HEALTH & RETIREMENT PROPERTIES TRUST
S-3, 1997-05-12
REAL ESTATE INVESTMENT TRUSTS
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      As filed with the Securities and Exchange Commission on May 12, 1997
                              Registration No. 333-

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                             -----------------------
                                    FORM S-3

             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
                             -----------------------
                     HEALTH AND RETIREMENT PROPERTIES TRUST
             (Exact name of registrant as specified in its charter)
                             -----------------------
                Maryland                                  04-6558834
        (State or other jurisdiction of               (I.R.S. Employer 
         incorporation or organization)             Identification Number)

                                400 Centre Street
                           Newton, Massachusetts 02158
                                 (617) 332-3990
       (Address, including zip code, and telephone number, including area
               code, of registrant's principal executive offices)
                              ---------------------
                           David J. Hegarty, President
                     Health and Retirement Properties Trust
                                400 Centre Street
                           Newton, Massachusetts 02158
                                 (617) 332-3990
              (Name, address, including zip code, telephone number,
                   including area code, of agent for service)
                              ---------------------
                                    Copy to:
                       Alexander A. Notopoulos, Jr., Esq.
                            Sullivan & Worcester LLP
                             One Post Office Square
                           Boston, Massachusetts 02109
                                 (617) 338-2800
                              ---------------------
         Approximate  date of commencement of proposed sale to the public:  From
time  to  time or at one  time  after  the  effective  date of the  Registration
Statement as determined by the Registrant.
         If the only securities  being registered on this Form are being offered
pursuant to dividend or interest  reinvestment plans, please check the following
box. |_|
         If any of the  securities  being  registered  on  this  Form  are to be
offered  on a  delayed  or  continuous  basis  pursuant  to Rule 415  under  the
Securities Act of 1933, check the following box. |X|
         If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the  Securities  Act,  check the following box and
list the Securities Act registration  statement number of the earlier  effective
registration statement for the same offering. |_| _____________
         If this  Form is a  post-effective  amendment  filed  pursuant  to Rule
462(c) under the Securities Act, check the following box and list the Securities
Act  registration   statement  number  of  the  earlier  effective  registration
statement for the same offering. |_| _____________
         If delivery of the  prospectus  is expected to be made pursuant to Rule
434, please check the following box. |_|
                             -----------------------
<TABLE>
<CAPTION>
                                                      CALCULATION OF REGISTRATION FEE
                                                                       Proposed Maximum   Proposed Maximum
                                                       Amount to        Offering Price   Aggregate Offering          Amount of
Title of Each Class of Securities to be Registered(1) be Registered      Per Unit(2)(3)       Price(4)(5)        Registration Fee(4)
<S>                                                  <C>         <C>                        <C>                  <C>
Debt Securities (6) ............................
Preferred Shares of Beneficial Interest, without par
value...........................................
Depositary Shares Representing Preferred Shares.
Common Shares of Beneficial Interest, par value
$.01 per share (7) .............................
Warrants........................................
Total                                                  $870,096,875                           $870,096,875          $263,666 (8)(9)
                                                                                                         (Footnotes on next page)
         The Registrant hereby amends this  Registration  Statement on such date
or dates as may be necessary to delay its  effective  date until the  Registrant
shall file a further amendment which specifically  states that this Registration
Statement shall  thereafter  become effective in accordance with Section 8(a) of
the Securities  Act of 1933 or until this  Registration  Statement  shall become
effective on such date as the Commission,  acting pursuant to said Section 8(a),
may determine.                                                             
<PAGE>


<FN>
(1)  The Debt  Securities,  Preferred  Shares,  Depositary  Shares,  Common  Shares  and/or  Warrants  (collectively,  the  "Offered
     Securities") covered hereby.  Offered Securities  registered hereunder may be sold separately,  together or as units with other
     Offered  Securities  registered  hereunder.  Subject to Footnote (4),  there are being  registered  hereunder an  indeterminate
     principal amount of Debt Securities,  Preferred Shares (and Depositary Shares with respect thereto), Common Shares and Warrants
     as may be sold from time to time by the Registrant. This Registration Statement also covers contracts that may be issued by the
     Registrant  under which the  counterparty may be required to purchase Debt Securities,  Preferred  Shares,  Depositary  Shares,
     Common Shares or Warrants.  Such contracts would be issued with Debt Securities,  Preferred Shares,  Depositary Shares,  Common
     Shares or Warrants.  There are also being registered hereunder an indeterminate principal amount of Debt Securities,  Preferred
     Shares,  Depositary  Shares,  Common  Shares and Warrants as may be issuable upon  conversion  or exchange of Debt  Securities,
     Preferred Shares or Warrants or pursuant to antidilution provisions thereof.

(2)  In U.S.  dollars or the  equivalent  thereof in one or more  foreign  currencies  or currency  units or  composite  currencies,
     including the European Currency Unit.

(3)  The proposed  maximum  offering price per unit will be determined  from time to time by the  Registrant in connection  with the
     issuance by the Registrant of the securities registered hereunder.

(4)  Estimated solely for the purpose of calculating the  registration  fee pursuant to Rule 457(o).  In no event will the aggregate
     initial offering price of the Debt Securities,  Preferred Shares,  Depositary  Shares,  Common Shares and Warrants issued under
     this Registration Statement exceed $870,096,875 or the equivalent thereof in one or more foreign or composite currencies.

(5)  No separate consideration will be received for (i) Debt Securities,  Common Shares,  Preferred Shares or Depositary Shares that
     are issued upon conversion of Debt Securities,  Preferred Shares or Depositary  Shares or (ii) Debt Securities,  Common Shares,
     Preferred Shares or Depositary Shares that are issued upon exercise of Warrants registered hereby.

(6)  If any such Debt  Securities  are issued at an original  issue  discount,  then the  offering  price  shall be in such  greater
     principal amount as shall result in an aggregate initial offering price of up to $870,096,875.

(7)  The aggregate amount of Common Shares  registered  hereunder is limited to that which is permissible under Rule 415(a)(4) under
     the Securities Act of 1933, as amended.

(8)  Calculated pursuant to Rule 457(o) of the rules and regulations under the Securities Act of 1933, as amended.

(9)  Pursuant to Rule 429(a) of the rules and  regulations  under the Securities Act of 1933, as amended,  the Prospectus  contained
     herein also relates to  $129,903,125  in Debt  Securities,  Common Shares,  Preferred  Shares,  Depository  Shares and Warrants
     included in the Company's Registration Statement on Form S-3 (File No. 333-02863). The amount of the filing fee associated with
     such securities that was previously paid with such registration statement was $44,794.
</FN>
</TABLE>

THE PROSPECTUS CONTAINED HEREIN IS A COMBINED PROSPECTUS PURSUANT TO RULE 429(A)
OF THE RULES AND REGULATIONS UNDER THE SECURITIES ACT OF 1933, AS AMENDED, WHICH
ALSO  RELATES TO  $129,903,125  IN DEBT  SECURITIES,  COMMON  SHARES,  PREFERRED
SHARES,  DEPOSITORY SHARES AND WARRANTS  INCLUDED IN THE COMPANY'S  REGISTRATION
STATEMENT ON FORM S-3 (FILE NO. 333-02863).



<PAGE>
Information   contained  herein  is  subject  to  completion  or  amendment.   A
registration  statement  relating  to these  securities  has been filed with the
Securities  and Exchange  Commission.  These  securities may not be sold nor may
offers to buy be accepted prior to the time the registration  statement  becomes
effective.  This  prospectus  shall  not  constitute  an  offer  to  sell or the
solicitation of an offer to buy nor shall there by any sale of these  securities
in any State in which such offer,  solicitation  or sale would be unlawful prior
to registration or qualification under the securities laws of any such State.

                              Subject to Completion
                    Preliminary Prospectus Dated May 12, 1997

PROSPECTUS

                                 $1,000,000,000
                     Health and Retirement Properties Trust
            Debt Securities, Preferred Shares of Beneficial Interest,
      Depositary Shares, Common Shares of Beneficial Interest and Warrants

                             ----------------------

     Health and  Retirement  Properties  Trust (the "Company" or "HRP") may from
time to time offer in one or more series (i) its unsecured debt  securities (the
"Debt Securities"),  (ii) its preferred shares of beneficial interest, par value
$.01  per  share  (the  "Preferred  Shares"),  (iii)  fractional  shares  of the
Preferred Shares (the "Depositary Shares"), (iv) its common shares of beneficial
interest,  par value $.01 per share (the  "Common  Shares"),  or (v) warrants to
purchase any of the above securities (the "Warrants"),  with an aggregate public
offering price of up to  $1,000,000,000 on terms to be determined at the time of
offering.  The Debt Securities,  Preferred  Shares,  Depositary  Shares,  Common
Shares and Warrants  (collectively,  the "Offered  Securities")  may be offered,
separately or together,  in separate series, in amounts,  at prices and on terms
to be set forth in a supplement to this Prospectus (a "Prospectus Supplement").

     The  specific  terms of the  Offered  Securities  in  respect of which this
Prospectus is being  delivered  will be set forth in the  applicable  Prospectus
Supplement  and  will  include,  where  applicable:  (i) in  the  case  of  Debt
Securities,  the specific title,  aggregate  principal  amount,  currency,  form
(which may be  registered  or bearer,  or  certificated  or global),  authorized
denominations,  maturity,  rate (or manner of  calculation  thereof) and time of
payment  of  interest,  terms for  redemption  at the  option of the  Company or
repayment at the option of the holder,  terms for sinking fund  payments,  terms
for conversion into Preferred Shares,  Depositary Shares or Common Shares, terms
for  subordination  to other  indebtedness  of the Company,  any original  issue
discount and any initial public  offering  price;  (ii) in the case of Preferred
Shares,  the  specific  title  and  stated  value,  any  dividend,  liquidation,
redemption, conversion, voting and other rights, and any initial public offering
price;  (iii)  in the  case of  Depositary  Shares,  the  fractional  shares  of
Preferred  Shares  represented  by each  Depositary  Share,  (iv) in the case of
Common  Shares,  any  offering  price;  and  (v) in the  case of  Warrants,  the
securities to which they relate,  duration,  offering price,  exercise price and
detachability.

     The applicable Prospectus  Supplement will also contain information,  where
applicable,  about  certain  United  States  federal  income tax  considerations
relating to, and any listing on a securities exchange of, the Offered Securities
covered by such Prospectus Supplement.
                             ----------------------

    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
       AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS
       THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COM-
        MISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS.
            ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
                             ----------------------

     The Offered  Securities may be offered directly,  through agents designated
from time to time by the Company or to or through  underwriters  or dealers.  If
any  agents  or  underwriters  are  involved  in the sale of any of the  Offered
Securities,  their names, and any applicable  purchase price, fee, commission or
discount  arrangement  between  or among  them,  will be set  forth,  or will be
calculable  from  the  information  set  forth,  in an  accompanying  Prospectus
Supplement.  See  "Plan of  Distribution."  No  Offered  Securities  may be sold
without delivery of a Prospectus  Supplement  describing the method and terms of
the offering of such Offered Securities.
                             ----------------------

              The date of this Prospectus is ______________, 1997.

<PAGE>

     No  person  has  been  authorized  to give any  information  or to make any
representations  other than those contained or incorporated by reference in this
Prospectus in connection  with the offer  contained in this  Prospectus  and, if
given or made, such  information or  representations  must not be relied upon as
having been  authorized by the Company or any  underwriters,  agents or dealers.
This Prospectus does not constitute an offer to sell or solicitation of an offer
to buy  securities in any  jurisdiction  to any person to whom it is unlawful to
make such offer or solicitation. Neither the delivery of this Prospectus nor any
sale made hereunder shall, under any  circumstances,  create an implication that
there has been no change in the  affairs  of the  Company  and its  subsidiaries
since the date hereof or the information  contained or incorporated by reference
herein is correct at any time subsequent to the date hereof.

                              AVAILABLE INFORMATION

     The Company has filed with the  Securities  and  Exchange  Commission  (the
"Commission")  in  Washington,  D.C.,  a  registration  statement  on  Form  S-3
(together with all exhibits, schedules and amendments thereto, the "Registration
Statement") under the Securities Act of 1933, as amended (the "Securities Act"),
with respect to the Offered Securities. This Prospectus,  which is a part of the
Registration Statement, does not contain all of the information set forth in the
Registration Statement.  Statements in this Prospectus as to the contents of any
contract or other document are not  necessarily  complete,  and in each instance
reference is made to the copy of such  contract or other  documents  filed as an
exhibit to the  Registration  Statement,  each such statement being qualified in
all  respects by such  reference  and the exhibits and  schedules  thereto.  For
further information concerning the Company and the Offered Securities, reference
is made to the Registration Statement.  Copies of the Registration Statement may
be obtained from the Commission at its principal office in Washington, D.C. upon
payment of the prescribed fee.

     The Company is subject to the informational  requirements of the Securities
Exchange  Act of 1934,  as amended  (the  "Exchange  Act"),  and, in  accordance
therewith,  files  reports  and  other  information  with  the  Commission.  The
Registration  Statement,  the exhibits and schedules  forming a part thereof and
the reports,  proxy statements and other  information  filed by the Company with
the  Commission  can be inspected  and copies  obtained at the public  reference
facilities maintained by the Commission at Judiciary Plaza, Room 1024, 450 Fifth
Street, N.W.,  Washington,  D.C. 20549, and at the following regional offices of
the Commission:  Chicago Regional  Office,  Suite 1400, 500 West Madison Street,
Chicago,  Illinois  60661-2511;  and New York Regional Office, Seven World Trade
Center,  New York,  New York 10048.  Copies of such  material can be obtained at
prescribed  rates from the Public  Reference  Section of the  Commission  at its
principal  office  at 450  Fifth  Street,  N.W.,  Washington,  D.C.  20549.  The
Commission  maintains  a World Wide Web site that  contains  reports,  proxy and
information  statements and other information regarding  registrants,  including
the Company,  that file electronically  with the Commission.  The address of the
site is  http://www.sec.gov.  The Company's  Common Shares are traded on the New
York Stock  Exchange  ("NYSE")  under the symbol "HRP," and similar  information
concerning  the Company may be  inspected  at the office of the NYSE at 20 Broad
Street, New York, New York 10005.

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

     The following documents, which have been filed with the Commission pursuant
to the Exchange Act, are hereby incorporated in this Prospectus and specifically
made a part hereof by reference:  (i) the  Company's  Annual Report on Form 10-K
for the fiscal year ended  December  31, 1996 (the  "Annual  Report"),  (ii) the
information  in Item 5, Other  Events,  under the  caption  "Legal  Proceedings"
contained in the Company's  Current  Report on Form 8-K dated February 13, 1997,
(iii) the  Company's  Current  Reports on Form 8-K dated  February  17, 1997 and
March  14,  1997,  (iv)  the  consolidated   financial  statements  of  Marriott
International,  Inc. ("MII"),  at and for the fiscal year ended January 3, 1997,
as contained in MII's Annual  Report on Form 10-K for the year ended  January 3,
1997  (Commission  File No.  1-12188),  and (v) the description of the Company's
Common  Shares  contained in the  Company's  Registration  Statement on Form 8-A
dated  November 8, 1986, as amended by Form 8 dated July 30, 1991. All documents
filed by the  Company  pursuant  to  Section  13(a),  13(c),  14 or 15(d) of the
Exchange  Act  subsequent  to the  date  of this  Prospectus  and  prior  to the
termination of the offering of the Offered Securities shall

                                      (ii)
<PAGE>

be deemed to be  incorporated by reference into this Prospectus and to be a part
hereof from the respective dates of filing of such documents.

     Any statement  contained herein or in a document  incorporated or deemed to
be incorporated herein by reference shall be deemed to be modified or superseded
for purposes of this Prospectus to the extent that a statement  contained herein
(or in the  applicable  Prospectus  Supplement),  or in any  subsequently  filed
document  that  also is or is  deemed to be  incorporated  herein by  reference,
modifies  or  supersedes  such  statement.  Any such  statement  so  modified or
superseded  shall  not be  deemed,  except  as so  modified  or  superseded,  to
constitute a part of this Prospectus.

     The Company hereby  undertakes to provide  without charge to each person to
whom this  Prospectus  is  delivered,  upon the written or oral  request of such
person, a copy of any and all of the information  that has been  incorporated by
reference  in this  Prospectus  (excluding  exhibits  unless such  exhibits  are
specifically incorporated by reference into the information that this Prospectus
incorporates).  Requests  for such  copies  should be made to the Company at its
principal executive offices,  400 Centre Street,  Newton,  Massachusetts  02158,
Attention: Investor Relations, telephone (617) 332-3990.


                                      (iii)

<PAGE>
                                   THE COMPANY

     The  Company is a real  estate  investment  trust  ("REIT")  which  invests
primarily in retirement  communities,  assisted living  centers,  long-term care
facilities  and other  income  producing  healthcare  related real estate and in
office buildings leased to various agencies of the United States government.  At
May 1, 1997, the Company had  investments  totaling (at cost) over $1.7 billion,
of which  approximately  68%  represented  healthcare  related  properties,  26%
represented U.S. Government-leased office buildings and 6% represented an equity
investment  in  Hospitality   Properties   Trust  ("HPT"),   a  New  York  Stock
Exchange-listed  REIT  founded by the  Company  which  invests  in  hotels.  The
Company's  investments  on such date were in over 200  properties  located in 32
states.  Additionally,  on May 1, 1997,  HPT owned and leased an aggregate of 92
hotels located in 29 states.

     The Company is organized as a Maryland real estate  investment  trust.  The
Company's   principal   place  of  business  is  400  Centre   Street,   Newton,
Massachusetts 02158 and its telephone number is (617) 332-3990.

                                 USE OF PROCEEDS

     Unless otherwise  described in the applicable  Prospectus  Supplement,  the
Company intends to use the net proceeds from the sale of the Offered  Securities
for general  business  purposes,  which may include the acquisition of, or other
investments in, retirement communities,  assisted living centers, long-term care
facilities or other health care related properties or government-leased or other
office  buildings and the repayment of indebtedness  outstanding at such time or
the  reduction of amounts  outstanding  under the Company's  credit  facilities.
Pending  utilization  as set  forth  above,  the  proceeds  from the sale of the
Offered  Securities  will be  invested  in  short  term  investments,  including
repurchase agreements. Such investments may not be investment grade.

                       RATIO OF EARNINGS TO FIXED CHARGES

     The  following  table  sets  forth  the  Company's  consolidated  ratios of
earnings to fixed charges for the periods indicated:
<TABLE>
<CAPTION>
                                                                       For the year ended December 31,
                                                      ------------------------------------------------------------------
                                                          1996         1995          1994          1993         1992
                                                          ----         ----          ----          ----         ----
<S>                                                      <C>          <C>           <C>           <C>          <C>
Ratio of earnings to fixed charges                        4.3x         3.4x          6.7x          6.8x         3.6x
</TABLE>

     The ratios of earnings to fixed  charges  presented  above were computed by
dividing the Company's  earnings by fixed  charges.  For this purpose,  earnings
have been  calculated  by adding fixed  charges to income  before  income taxes,
extraordinary items and gain or loss on the disposition of real property.  Fixed
charges consist of interest costs, whether expensed or capitalized, the interest
component of rental expense, if any, amortization of debt discounts and deferred
financing costs,  whether expensed or capitalized.  To date, the Company has not
issued any Preferred Shares;  therefore, the ratio of earnings to combined fixed
charges  and  Preferred  Shares  distributions  are the  same as the  ratios  of
earnings to fixed charges presented above.

                         DESCRIPTION OF DEBT SECURITIES

     The  Debt  Securities  will be  issued  under  one or more  indentures  (an
"Indenture")  between the Company and a trustee (an  "Indenture  Trustee").  Any
Indenture will be subject to, and governed by, the Trust  Indenture Act of 1939,
as amended (the "TIA"). The statements made hereunder relating to any Indentures
and the Debt  Securities  to be  issued  thereunder  are  summaries  of  certain
anticipated provisions thereof and do not purport to be complete and are subject
to, and are qualified in their  entirety by reference to, all  provisions of the
Indentures and such Debt Securities.

                                        1
<PAGE>

General

     The Company has filed with its  Registration  Statement with respect to the
Offered  Securities a form of Indenture (as supplemented  from time to time, the
"Senior Indenture") relating to the Senior Securities (as defined) and a form of
Indenture (as  supplemented  from time to time,  the  "Subordinated  Indenture")
relating to the Subordinated  Securities (as defined).  The Debt Securities will
be direct,  unsecured obligations of the Company and, if issued under the Senior
Indenture, will rank equally and ratably with other unsecured and unsubordinated
indebtedness of the Company (the "Senior  Securities"),  or, if issued under the
Subordinated  Indenture,  will be  subordinated in right of payment to the prior
payment in full of Senior Indebtedness (as defined in the applicable  Prospectus
Supplement)  ("Subordinated  Securities").   See  "--Subordination".   The  Debt
Securities may be issued without limit as to aggregate  principal amount, in one
or more series,  in each case as established from time to time in or pursuant to
authority  granted by a resolution  of the Board of Trustees of the Company (the
"Trustees")  or as  established in one or more  indentures  supplemental  to any
Indenture. All Debt Securities of one series need not be issued at the same time
and, unless otherwise provided, a series may be reopened, without the consent of
the holders of the Debt  Securities of such series,  for issuances of additional
Debt Securities of such series.

     It is anticipated that any Indenture will provide that the Company may, but
need  not,  designate  more than one  Indenture  Trustee  thereunder,  each with
respect to one or more series of Debt  Securities.  Any Indenture  Trustee under
any  Indenture  may resign or be removed  with  respect to one or more series of
Debt Securities,  and a successor Indenture Trustee may be appointed to act with
respect  to such  series.  In the event that two or more  persons  are acting as
Indenture Trustee with respect to different series of Debt Securities, each such
Indenture  Trustee shall be a trustee of a trust under the applicable  Indenture
separate and apart from the trust  administered by any other Indenture  Trustee,
and, except as otherwise  indicated  herein,  any action  described herein to be
taken by the Indenture  Trustee may be taken by each such Indenture Trustee with
respect to, and only with respect to, the one or more series of Debt  Securities
for which it is Indenture Trustee under the applicable Indenture.

     Reference is made to the  Prospectus  Supplement  relating to the series of
Debt Securities being offered for the specific terms thereof,  including,  where
applicable, the following:

     (1)  the title of such Debt Securities and whether such Debt Securities are
          Senior Securities or Subordinated Securities;

     (2)  the aggregate  principal  amount of such Debt Securities and any limit
          on such aggregate principal amount;

     (3)  the percentage of the principal  amount at which such Debt  Securities
          will be issued and, if other than the principal  amount  thereof,  the
          portion of the principal  amount thereof  payable upon  declaration of
          acceleration of the maturity  thereof,  or (if applicable) the portion
          of the principal  amount of such Debt Securities which is convertible,
          or the method by which any such portion shall be determined;

     (4)  if   convertible,   the  terms  on  which  such  Debt  Securities  are
          convertible,  including the initial  conversion  price or rate and the
          conversion  period and any applicable  limitations on the ownership or
          transferability  of the securities into which such Debt Securities are
          convertible;

     (5)  the date or dates, or the method for  determining  such date or dates,
          on which the principal of such Debt Securities will be payable;

     (6)  the rate or rates (which may be fixed or  variable),  or the method by
          which  such  rate or rates  shall be  determined,  at which  such Debt
          Securities will bear interest, if any;

                                        2
<PAGE>

     (7)  the date or dates, or the method for  determining  such date or dates,
          from  which  any  interest  will  accrue,  the dates on which any such
          interest will be payable,  the record dates for such interest  payment
          dates,  or the method by which any such date shall be determined,  the
          person to whom such  interest  shall be  payable,  and the basis  upon
          which  interest  shall be  calculated  if other than that of a 360-day
          year of 12 months consisting of 30 days each;

     (8)  the place or places where the  principal  of, any premium and interest
          on,  and any  additional  amounts  payable  in  respect  of such  Debt
          Securities  will be payable,  such Debt  Securities may be surrendered
          for conversion or  registration of transfer or exchange and notices or
          demands to or upon the Company in respect of such Debt  Securities and
          the applicable Indenture may be served;

     (9)  the period or periods  within which,  the price or prices at which and
          the terms and  conditions  upon  which  such  Debt  Securities  may be
          redeemed,  as a whole or in part, at the option of the Company, if the
          Company is to have such an option;

     (10) the  obligation,  if any, of the Company to redeem,  repay or purchase
          such  Debt  Securities  pursuant  to any  sinking  fund  or  analogous
          provision  or at the  option of a holder  thereof,  and the  period or
          periods  within which,  the price or prices at which and the terms and
          conditions upon which such Debt Securities will be redeemed, repaid or
          purchased, as a whole or in part, pursuant to such obligation;

     (11) if other than U.S.  dollars,  the currency or currencies in which such
          Debt Securities are  denominated  and payable,  which may be a foreign
          currency  or units of two or more  foreign  currencies  or a composite
          currency or currencies, and the terms and conditions relating thereto;

     (12) if the  principal  of or  premium,  if any,  or  interest on such Debt
          Securities  is to be  payable,  at the  election  of the  Company or a
          holder thereof, in one or more currencies or currency units other than
          that or those in which such Debt  Securities are stated to be payable,
          the  currency,  currencies  or currency  units in which payment of the
          principal of and premium,  if any, and interest on Debt  Securities of
          such series as to which such  election  is made shall be payable,  and
          the periods within which and the terms and conditions  upon which such
          election is to be made;

     (13) whether the amount of payments of principal of (and  premium,  if any)
          or interest,  if any, on such Debt  Securities may be determined  with
          reference to an index,  formula or other method (which index,  formula
          or method  may,  but need  not,  be based on a  currency,  currencies,
          currency unit or units or composite  currency or  currencies)  and the
          manner in which such amounts shall be determined;

     (14) the events of default or  covenants  of such Debt  Securities,  to the
          extent  different from or in addition to those described  herein,  and
          any  provisions  granting  special  rights to the holders of such Debt
          Securities upon the occurrence of events  specified in such Prospectus
          Supplement;

     (15) whether such Debt  Securities  will be issued in  certificated  and/or
          book-entry form;

     (16) whether such Debt Securities will be in registered or bearer form and,
          if in registered form, the denominations  thereof if other than $1,000
          and  any  integral  multiple  thereof  and,  if in  bearer  form,  the
          denominations thereof and terms and conditions relating thereto;

     (17) whether any of such Debt  Securities  are to be issuable in  permanent
          global  form  (a  "Global   Security")  and,  if  so,  the  terms  and
          conditions,  if any, upon which  interests in such Debt  Securities in
          global form may be exchanged,  in whole or in part, for the individual
          Debt Securities represented thereby;

                                        3
<PAGE>

     (18) the applicability,  if any, of the defeasance and covenant  defeasance
          provisions described herein or any modification thereof;

     (19) if such Debt  Securities  are to be issued  upon the  exercise of debt
          warrants,  the time,  manner and place for such Debt  Securities to be
          authenticated and delivered;

     (20) whether and under what  circumstances  the Company will pay additional
          amounts on such Debt  Securities in respect of any tax,  assessment or
          governmental  charge  and, if so,  whether  the Company  will have the
          option to redeem such Debt  Securities in lieu of making such payment;
          and

     (21) any other terms of such Debt Securities.

     The Debt Securities may provide for less than the entire  principal  amount
thereof to be payable upon  declaration of acceleration of the maturity  thereof
("Original Issue Discount Securities"). If material or applicable,  special U.S.
federal income tax, accounting and other  considerations  applicable to Original
Issue  Discount  Securities  will  be  described  in the  applicable  Prospectus
Supplement.

     Except as described under  "--Merger,  Consolidation  or Sale" or as may be
set forth in any Prospectus Supplement,  an Indenture will not contain any other
provisions that would limit the ability of the Company to incur  indebtedness or
that would afford  holders of the Debt  Securities  protection in the event of a
highly  leveraged  or  similar  transaction  involving  the  Company.   However,
restrictions on ownership and transfers of the Company's capital stock, designed
to  preserve  its  status as a REIT,  may act to  prevent  or hinder a change of
control. See "Redemption; Business Combinations and Control Share Acquisitions."
Reference is made to the applicable  Prospectus  Supplement for information with
respect to any deletions  from,  modifications  of or additions to the events of
default or  covenants  that are  described  below,  including  any addition of a
covenant or other provisions providing event risk or similar protection.

Denominations, Interest, Registration and Transfer

     Unless otherwise  described in the applicable  Prospectus  Supplement,  the
Debt  Securities  of any  series  which are  registered  securities,  other than
registered  securities issued in global form (which may be of any denomination),
shall be issuable in denominations of $1,000 and any integral multiple thereof.

     Unless otherwise  specified in the applicable  Prospectus  Supplement,  the
principal of (and premium, if any) and interest on any series of Debt Securities
will  be  payable  at the  corporate  trust  office  of the  Indenture  Trustee,
initially at the address  which will be set forth in the  applicable  Prospectus
Supplement; provided that, at the option of the Company, payment of interest may
be made by check  mailed to the  address  of the person  entitled  thereto as it
appears in the  applicable  register or by wire transfer of funds to such person
at an account maintained within the United States.

     Any  interest  not  punctually  paid or duly  provided  for on any interest
payment  date  with  respect  to a Debt  Security  ("Defaulted  Interest")  will
forthwith  cease to be payable to the holder on the  applicable  regular  record
date and may either be paid to the person in whose  name such Debt  Security  is
registered  at the close of  business  on a special  record  date (the  "Special
Record  Date") for the  payment of such  Defaulted  Interest  to be fixed by the
applicable  Indenture  Trustee,  notice  whereof shall be given to the holder of
such Debt  Security not less than 10 days prior to such Special  Record Date, or
may be paid at any  time in any  other  lawful  manner,  all as more  completely
described in the applicable Indenture.

     Subject to  certain  limitations  imposed  upon Debt  Securities  issued in
book-entry  form,  the Debt  Securities of any series will be  exchangeable  for
other Debt Securities of the same series and of a like aggregate principal

                                        4
<PAGE>

amount and tenor of different  authorized  denominations  upon surrender of such
Debt  Securities  at the  corporate  trust  office of the  applicable  Indenture
Trustee.  In  addition,   subject  to  certain  limitations  imposed  upon  Debt
Securities  issued in book-entry  form, the Debt Securities of any series may be
surrendered for conversion or registration of transfer  thereof at the corporate
trust  office  of  the  applicable   Indenture  Trustee.   Every  Debt  Security
surrendered for  conversion,  registration of transfer or exchange shall be duly
endorsed or accompanied by a written  instrument of transfer.  No service charge
will  be  made  for  any  registration  of  transfer  or  exchange  of any  Debt
Securities,  but the Indenture  Trustee or the Company may require  payment of a
sum  sufficient  to  cover  any tax or  other  governmental  charge  payable  in
connection  therewith.  If the applicable  Prospectus  Supplement  refers to any
transfer agent (in addition to the Indenture  Trustee)  initially  designated by
the Company  with respect to any series of Debt  Securities,  the Company may at
any time rescind the  designation of any such transfer agent or approve a change
in the location  through  which any such  transfer  agent acts,  except that the
Company  will be required to maintain a transfer  agent in each place of payment
for such  series.  The Company  may at any time  designate  additional  transfer
agents with respect to any series of Debt Securities.

     Neither  the  Company nor any  Indenture  Trustee  shall be required to (i)
issue, register the transfer of or exchange Debt Securities of any series during
a period  beginning  at the opening of business 15 days before any  selection of
Debt  Securities  of that  series  to be  redeemed  and  ending  at the close of
business  on (a) if  such  Debt  Securities  are  issuable  only  as  registered
securities,  the day of the mailing of the relevant notice of redemption and (b)
if such Debt Securities are issuable as bearer securities,  the day of the first
publication of the relevant notice of redemption or, if such Debt Securities are
also issuable as registered securities and there is no publication,  the mailing
of the  relevant  notice of  redemption,  or (ii) to register the transfer of or
exchange any registered security so selected for redemption in whole or in part,
except,  in the case of any  registered  security to be  redeemed  in part,  the
portion thereof not to be redeemed,  or (iii) to exchange any bearer security so
selected for redemption  except that such a bearer security may be exchanged for
a  registered  security  of that  series  and like  tenor;  provided  that  such
registered security shall be simultaneously  surrendered for redemption, or (iv)
to issue,  register the transfer of or exchange any Debt Security which has been
surrendered  for repayment at the option of the holder,  except the portion,  if
any, of such Debt Security not to be so repaid.

Merger, Consolidation or Sale

     The  Company  may  consolidate  with,  or  sell,  lease  or  convey  all or
substantially  all of its assets to, or merge  with or into,  any other  entity;
provided  that (i)  either the  Company  shall be the  continuing  entity or the
successor  entity (if other than the Company)  formed by or  resulting  from any
such  consolidation  or merger or which shall have received the transfer of such
assets shall expressly assume payment of the principal of (and premium,  if any)
and interest on all of the Debt Securities and the due and punctual  performance
and  observance  of  all  of  the  covenants  and  conditions  contained  in any
Indenture; (ii) immediately after giving effect to such transaction and treating
any indebtedness which becomes an obligation of the Company or any subsidiary as
a result  thereof as having been  incurred by the Company or such  subsidiary at
the time of such  transaction,  no event of default under any Indenture,  and no
event which,  after notice or the lapse of time,  or both,  would become such an
event of default, shall have occurred and be continuing;  and (iii) an officer's
certificate and legal opinion covering such conditions shall be delivered to the
Indenture Trustee.

Certain Covenants

     Existence. Except as permitted under "--Merger, Consolidation or Sale," the
Company  will be  required  to do or cause to be done all  things  necessary  to
preserve  and keep in full  force and  effect its  corporate  existence,  rights
(charter and  statutory) and  franchises;  provided,  however,  that the Company
shall not be required to preserve any right or franchise if it  determines  that
the preservation thereof is no longer desirable in the conduct of its business.

     Provision of Financial  Information.  Whether or not the Company is subject
to Section 13 or 15(d) of the  Exchange  Act,  the Company  will,  to the extent
permitted under the Exchange Act, file with the Commission the

                                        5
<PAGE>

annual  reports,  quarterly  reports and other documents which the Company would
have been  required to file with the  Commission  pursuant to such Section 13 or
15(d)  (the  "Financial  Statements")  if the  Company  were  so  subject,  such
documents to be filed with the  Commission on or prior to the  respective  dates
(the  "Required  Filing Dates") by which the Company would have been required so
to file such documents if the Company were so subject.  The Company will also in
any event (i) within 15 days of each  Required  Filing Date (a) transmit by mail
to all holders of Debt  Securities,  as their names and addresses  appear in the
Company's security register,  without cost to such holders, copies of the annual
reports and quarterly reports which the Company would have been required to file
with the  Commission  pursuant to Section 13 or 15(d) of the Exchange Act if the
Company  were  subject  to such  Sections,  and (b)  file  with  the  applicable
Indenture  Trustee  copies of the annual  reports,  quarterly  reports and other
documents which the Company would have been required to file with the Commission
pursuant to Section 13 or 15(d) of the  Exchange Act if the Company were subject
to such  Sections,  and (ii) if filing such  documents  by the Company  with the
Commission  is not  permitted  under the  Exchange  Act,  promptly  upon written
request and payment of the reasonable cost of duplication  and delivery,  supply
copies of such documents to any prospective holder of Debt Securities.

     Additional Covenants.  Any additional or different covenants of the Company
with  respect  to any  series  of  Debt  Securities  will  be set  forth  in the
applicable Prospectus Supplement.

Events of Default, Notice and Waiver

     Each  Indenture  will  provide  that the  following  events are  "Events of
Default" with respect to any series of Debt Securities  issued  thereunder;  (a)
default for 30 days in the payment of any  installment  on any Debt  Security of
such series; (b) default in the payment of the principal of (or premium, if any,
on) any Debt Security of such series at its maturity;  (c) default in making any
sinking  fund  payments as required for any Debt  Security of such  series;  (d)
default in the performance of any other covenant of the Company contained in the
applicable  Indenture  (other than a covenant added to such Indenture solely for
the benefit of a series of Debt  Securities  issued  thereunder  other than such
series),  such default  having  continued  for 60 days after  written  notice as
provided in such Indenture; (e) default in the payment of an aggregate principal
amount  exceeding a specified  dollar amount of any evidence of  indebtedness of
the Company or any  mortgage,  indenture  or other  instrument  under which such
indebtedness is issued or by which such  indebtedness  is secured,  such default
having  occurred after the expiration of any applicable  grace period and having
resulted in the acceleration of the maturity of such  indebtedness,  but only if
such  indebtedness  is not discharged or such  acceleration  is not rescinded or
annulled;  (f) certain events of bankruptcy,  insolvency or  reorganization,  or
court  appointment  of a receiver,  liquidator  or trustee of the Company or any
Significant  Subsidiary  (as  hereinafter  defined)  or any of their  respective
property;  and (g) any  other  event  of  default  provided  with  respect  to a
particular series of Debt Securities.  The term  "Significant  Subsidiary" means
each significant  subsidiary (as defined in Regulation S-X promulgated under the
Securities Act) of the Company.

     If an Event of Default (other than an Event of Default  described in clause
(f) above) under any Indenture with respect to Debt  Securities of any series at
the time  outstanding  occurs  and is  continuing,  then in every  such case the
applicable  Indenture  Trustee or the  holders  of not less than a  majority  in
principal  amount of the outstanding  Debt Securities of that series may declare
the  principal  amount (or, if the Debt  Securities  of that series are Original
Issue Discount Securities or indexed  securities,  such portion of the principal
amount as may be specified in the terms  thereof) of all of the Debt  Securities
of that series to be due and payable  immediately  by written  notice thereof to
the Company (and to the applicable  Indenture  Trustee if given by the holders).
If an Event of Default  described  in clause (f) above with  respect to the Debt
Securities  of any series at the time  outstanding  shall occur,  the  principal
amount of all the Debt  Securities  of that  series (or, in the case of any such
Original Issue Discount Security or other Debt Security,  such specified amount)
will  automatically,  and  without  any action by the  Indenture  Trustee or any
holder of such series of Debt  Securities,  become  immediately due and payable.
However,  at any time after such a declaration of  acceleration  with respect to
Debt Securities of such series (or of all Debt Securities then outstanding under
the  applicable  Indenture,  as the  case may be) has been  made,  but  before a
judgment  or  decree  for  payment  of the money  due has been  obtained  by the
applicable  Indenture  Trustee,  the  holders  of not less  than a  majority  in
principal  amount of outstanding  Debt Securities of such series (or of all Debt
Securities then

                                        6
<PAGE>

outstanding under the applicable Indenture,  as the case may be) may rescind and
annul  such  declaration  and its  consequences  if (i) the  Company  shall have
deposited with the  applicable  Indenture  Trustee all required  payments of the
principal of (and premium,  if any) and interest on the Debt  Securities of such
series  (or of  all  Debt  Securities  then  outstanding  under  the  applicable
Indenture,  as the case may be), plus certain fees, expenses,  disbursements and
advances of the applicable  Indenture  Trustee,  and (ii) all Events of Default,
other than the  non-payment  of  accelerated  principal  (or  specified  portion
thereof),  or premium, if any, or interest on the Debt Securities of such series
(or of all Debt Securities then outstanding under the applicable  Indenture,  as
the  case may be) have  been  cured or  waived  as  provided  in the  applicable
Indenture. Each of the Indentures will also provide that the holders of not less
than a majority in principal  amount of the  outstanding  Debt Securities of any
series  (or of  all  Debt  Securities  then  outstanding  under  the  applicable
Indenture,  as the case may be) may waive any past  default with respect to such
series  and  its  consequences,  except  a  default  (i) in the  payment  of the
principal  of (or  premium,  if any) or  interest  on any Debt  Security of such
series or (ii) in respect of a covenant or provision contained in the applicable
Indenture  that cannot be modified or amended  without the consent of the holder
of each outstanding Debt Security affected thereby.

     The  Indenture  Trustee  will be  required to give notice to the holders of
Debt  Securities  within 90 days of a default  under  the  applicable  Indenture
unless  such  default  has been cured or waived;  provided,  however,  that such
Indenture  Trustee  may  withhold  notice to the  holders  of any series of Debt
Securities  of any default with respect to such series  (except a default in the
payment  of the  principal  of (or  premium,  if any) or  interest  on any  Debt
Security of such series or in the payment of any  sinking  fund  installment  in
respect of any Debt Security of such series) if specified  responsible  officers
of such  Indenture  Trustee  consider such  withholding to be in the interest of
such holders.

     Each  Indenture  will  provide  that no holders of Debt  Securities  of any
series may institute any proceedings, judicial or otherwise, with respect to the
Indenture  or for any  remedy  thereunder,  except in the case of failure of the
Indenture  Trustee,  for 60 days, to act after it has received a written request
to institute  proceedings  in respect of an event of default from the holders of
not less than a majority in principal  amount of the outstanding Debt Securities
of such series, as well as an offer of reasonable indemnity. This provision will
not prevent,  however,  any holder of Debt Securities from  instituting suit for
the  enforcement  of  payment  of the  principal  of (and  premium,  if any) and
interest on such Debt Securities at the respective due dates thereof.

     Subject to provisions in the applicable Indenture relating to its duties in
case of default,  no Indenture  Trustee will be under any obligation to exercise
any of its rights or powers under such  Indenture at the request or direction of
any  holders  of any  series of Debt  Securities  then  outstanding  under  such
Indenture,  unless such  holders  shall have  offered to the  Indenture  Trustee
reasonable  security  or  indemnity.  The holders of not less than a majority in
principal  amount of the  outstanding  Debt  Securities of any series (or of all
Debt Securities then outstanding under the applicable Indenture, as the case may
be) shall have the right to direct the time,  method and place of conducting any
proceeding for any remedy available to the applicable  Indenture Trustee,  or of
exercising any trust or power conferred upon such Indenture Trustee.  However, a
Indenture  Trustee may refuse to follow any direction  which is in conflict with
any law or the Indenture,  which may involve such Indenture  Trustee in personal
liability or which may be unduly  prejudicial to the holders of Debt  Securities
of such series not joining therein.

     The Company will be required to deliver to each Indenture  Trustee annually
a  certificate,  signed by one of several  specified  officers  of the  Company,
stating  whether or not such  officer has  knowledge  of any  default  under the
applicable Indenture and, if so, specifying each such default and the nature and
status thereof.

Modification of the Indenture

     Modifications  and  amendments of an Indenture will be permitted to be made
only with the consent of the  holders of not less than a majority  in  principal
amount  of all  outstanding  Debt  Securities  or  series  of  outstanding  Debt
Securities  which are  affected by such  modification  or  amendment;  provided,
however,  that no such modification or amendment may, without the consent of the
holder of each such Debt Security affected thereby, (i)

                                        7
<PAGE>

change the stated  maturity of the principal of, or any  installment of interest
(or premium, if any) on any such Debt Security; (ii) reduce the principal amount
of, or the rate or amount of interest on, or any premium  payable on  redemption
of, any such Debt  Security,  or reduce the amount of  principal  of an Original
Issue  Discount  Security  that would be due and  payable  upon  declaration  of
acceleration  of the  maturity  thereof or would be provable in  bankruptcy,  or
adversely affect any right of repayment of the holder of any such Debt Security;
(iii)  change the place of  payment,  or the coin or  currency,  for  payment of
principal  of,  premium,  if any, or interest  on any such Debt  Security;  (iv)
impair the right to institute suit for the enforcement of any payment on or with
respect to any such Debt  Security;  (v) reduce the  above-stated  percentage of
outstanding  Debt  Securities  of any  series  necessary  to modify or amend the
Indenture,  to waive  compliance  with  certain  provisions  thereof  or certain
defaults  and  consequences  thereunder  or  to  reduce  the  quorum  or  voting
requirements  set forth in such  Indenture;  or (vi) modify any of the foregoing
provisions  or any of the  provisions  relating  to the waiver of  certain  past
defaults or certain  covenants,  except to increase the required  percentage  to
effect  such  action or to provide  that  certain  other  provisions  may not be
modified or waived without the consent of the holder of such Debt Security.

     Each Indenture will provide that the holders of not less than a majority in
principal  amount of a series of outstanding  Debt  Securities have the right to
waive compliance by the Company with certain  covenants  relating to such series
of Debt Securities in such Indenture.

     Modifications  and  amendments of an Indenture will be permitted to be made
by the Company  and the  applicable  Indenture  Trustee  thereunder  without the
consent of any holder of Debt Securities for any of the following purposes:  (i)
to evidence the  succession  of another  person to the Company as obligor  under
such  Indenture;  (ii) to add to the covenants of the Company for the benefit of
the holders of all or any series of Debt Securities or to surrender any right or
power  conferred  upon the  Company  in such  Indenture;  (iii) to add events of
default for the benefit of the holders of all or any series of Debt  Securities;
(iv) to add or change any provisions of the Indenture to facilitate the issuance
of, or to  liberalize  certain  terms of, Debt  Securities in bearer form, or to
permit or facilitate  the issuance of Debt  Securities in  uncertificated  form;
provided  that such  action  shall not  adversely  affect the  interests  of the
holders  of the Debt  Securities  in any  material  respect;  (v) to  change  or
eliminate  any  provisions  of the  Indenture;  provided that any such change or
elimination  shall  become  effective  only when  there  are no Debt  Securities
outstanding  of any series  created  prior  thereto  which are  entitled  to the
benefit  of such  provision;  (vi) to  secure  the  Debt  Securities;  (vii)  to
establish  the form or terms of Debt  Securities  of any series,  including  the
provisions  and  procedures,  if  applicable,  for the  conversion  of such Debt
Securities  into Common  Shares or Preferred  Shares;  (viii) to provide for the
acceptance of  appointment  by a successor  Indenture  Trustee or facilitate the
administration  of the  trusts  under an  Indenture  by more than one  Indenture
Trustee;  (ix) to cure any ambiguity,  defect or  inconsistency in an Indenture;
provided that such action shall not adversely affect the interests of holders of
Debt Securities of any series in any material respect;  or (x) to supplement any
of the  provisions  of an  Indenture  to  the  extent  necessary  to  permit  or
facilitate  defeasance  and  discharge  of any  series of such Debt  Securities;
provided  that such  action  shall not  adversely  affect the  interests  of the
holders of the Debt Securities of any series in any material respect.

     Each Indenture will provide that in determining  whether the holders of the
requisite principal amount of outstanding Debt Securities of a series have given
any  request,  demand,  authorization,  direction,  notice,  consent  or  waiver
thereunder  or  whether a quorum is  present  at a meeting  of  holders  of Debt
Securities, (i) the principal amount of an Original Issue Discount Security that
shall be deemed to be outstanding  shall be the amount of the principal  thereof
that  would  be due  and  payable  as of the  date of  such  determination  upon
declaration of acceleration of the maturity  thereof,  (ii) the principal amount
of a Debt  Security  denominated  in a  foreign  currency  that  shall be deemed
outstanding  shall be the U.S. dollar  equivalent,  determined on the issue date
for such Debt Security,  of the principal amount (or, in the case of an Original
Issue Discount  Security,  the U.S. dollar  equivalent on the issue date of such
Debt  Security of the amount  determined  as  provided in (i) above),  (iii) the
principal amount of an indexed security that shall be deemed  outstanding  shall
be the  principal  face amount of such  indexed  security at original  issuance,
unless  otherwise  provided  with  respect  to  such  indexed  security  in  the
applicable Indenture, and (iv) Debt Securities owned by the Company or any other
obligor  upon the Debt  Securities  or any  affiliate  of the Company or of such
other obligor shall be disregarded.

                                        8
<PAGE>

     Each  Indenture  will  contain  provisions  for  convening  meetings of the
holders of Debt  Securities of a series.  A meeting may be called at any time by
an Indenture Trustee,  and also, upon request,  by the Company or the holders of
at least 25% in principal  amount of the  outstanding  Debt  Securities  of such
series,  in any such case,  upon notice  given as  provided  in such  Indenture.
Except for any  consent  that must be given by the holder of each Debt  Security
affected by certain modifications and amendments of an Indenture, any resolution
presented at a meeting or adjourned meeting duly reconvened at which a quorum is
present may be adopted by the  affirmative  vote of the holders of a majority in
principal  amount of the outstanding  Debt Securities of that series;  provided,
however,  that,  except as referred to above, any resolution with respect to any
request,  demand,  authorization,  direction,  notice,  consent, waiver or other
action  that  may be  made,  given  or  taken  by  the  holders  of a  specified
percentage,  which  is  less  than  a  majority,  in  principal  amount  of  the
outstanding Debt Securities of a series may be adopted at a meeting or adjourned
meeting duly reconvened at which a quorum is present by the affirmative  vote of
the holders of such specified  percentage in principal amount of the outstanding
Debt Securities for that series.  Any resolution passed or decision taken at any
meeting of holders of Debt Securities of any series duly held in accordance with
the applicable  Indenture  will be binding on all holders of Debt  Securities of
that series. The quorum at any meeting called to adopt a resolution,  and at any
reconvened  meeting,  will be persons  holding  or  representing  a majority  in
principal  amount of the  outstanding  Debt  Securities  of a series;  provided,
however,  that if any action is to be taken at such  meeting  with  respect to a
consent or waiver which may be given by the holders of not less than a specified
percentage in principal  amount of the outstanding  Debt Securities of a series,
the persons  holding or  representing  such  specified  percentage  in principal
amount of the  outstanding  Debt  Securities  of such series will  constitute  a
quorum.

     Notwithstanding the foregoing provisions,  each Indenture will provide that
if any action is to be taken at a meeting of holders of Debt  Securities  of any
series with respect to any request, demand,  authorization,  direction,  notice,
consent,  waiver or other action that such Indenture  expressly  provides may be
made,  given or taken by the holders of such  series and one or more  additional
series:  (i) there shall be no minimum quorum  requirement  for such meeting and
(ii) the principal amount of the outstanding Debt Securities of such series that
vote in  favor  of  such  request,  demand,  authorization,  direction,  notice,
consent,  waiver or other  action  shall be taken into  account  in  determining
whether such request, demand, authorization,  direction, notice, consent, waiver
or other action has been made, given or taken under such Indenture.

Discharge, Defeasance and Covenant Defeasance

     The Company may discharge  certain  obligations to holders of any series of
Debt Securities that have not already been delivered to the applicable Indenture
Trustee  for  cancellation  and that  either have become due and payable or will
become due and payable within one year (or scheduled for  redemption  within one
year) by irrevocably  depositing with such Indenture Trustee, in trust, funds in
such currency or  currencies,  currency  unit or units or composite  currency or
currencies in which such Debt Securities are payable in an amount  sufficient to
pay the entire indebtedness on such Debt Securities in respect of principal (and
premium,  if any)  and  interest  to the  date of such  deposit  (if  such  Debt
Securities  have become due and payable) or to the stated maturity or redemption
date, as the case may be.

     An  Indenture  may provide  that,  if certain  provisions  thereof are made
applicable  to the  Debt  Securities  of or  within  a  series  pursuant  to the
Indenture,  the Company may elect either (i) to defease and be  discharged  from
any and all  obligations  with respect to such Debt  Securities  (except for the
obligation to pay  additional  amounts,  if any, upon the  occurrence of certain
events of tax,  assessment  or  governmental  charge with respect to payments on
such Debt Securities and the obligations to register the transfer or exchange of
such Debt  Securities,  to replace  temporary or mutilated,  destroyed,  lost or
stolen Debt Securities,  to maintain an office or agency in respect of such Debt
Securities and to hold moneys for payment in trust) ("defeasance") or (ii) to be
released from its obligations with respect to such Debt Securities under certain
sections  of  such  Indenture   (including  the  restrictions   described  under
"--Certain  Covenants")  and,  if  provided  pursuant  to  such  Indenture,  its
obligations with respect to any other covenant,  and any omission to comply with
such  obligations  shall not  constitute  a default or an event of default  with
respect to such Debt Securities ("covenant defeasance"), in either case upon the
irrevocable deposit by the Company

                                        9
<PAGE>

with the applicable  Indenture Trustee, in trust, of an amount, in such currency
or  currencies,  currency  unit or units of composite  currency or currencies in
which  such Debt  Securities  are  payable  at stated  maturity,  or  Government
Obligations  (as defined  below),  or both,  applicable to such Debt  Securities
which  through the scheduled  payment of principal  and interest,  in accordance
with their terms will provide money in an amount sufficient to pay the principal
of (and premium, if any) and interest on such Debt Securities, and any mandatory
sinking fund or analogous payments thereon, on the scheduled dates therefor.

     Such a trust may be  established  only if, among other things,  the Company
has  delivered  to the  applicable  Indenture  Trustee an opinion of counsel (as
specified in the  applicable  Indenture)  to the effect that the holders of such
Debt Securities will not recognize income,  gain or loss for U.S. federal income
tax purposes as a result of such  defeasance or covenant  defeasance and will be
subject to U.S.  federal income tax on the same amounts,  in the same manner and
at the same times as would  have been the case if such  defeasance  or  covenant
defeasance had not occurred.

     "Government  Obligations" means securities which are (i) direct obligations
of the United  States of  America or the  government  which  issued the  foreign
currency in which the Debt  Securities of a particular  series are payable,  for
the payment of which its full faith and credit is pledged or (ii) obligations of
a person controlled or supervised by and acting as an agency or  instrumentality
of the United  States of America or such  government  which  issued the  foreign
currency in which the Debt  Securities of a particular  series are payable,  the
payment  of which is  unconditionally  guaranteed  as a full  faith  and  credit
obligation by the United States of America or such other  government,  which, in
either case, are not callable or redeemable at the option of the issuer thereof,
and shall also include a depository receipt issued by a bank or trust company as
custodian with respect to any such Government  Obligation or a specific  payment
of interest  on or  principal  of any such  Government  Obligation  held by such
custodian for the account of the holder of a depository  receipt;  provided that
(except  as  required  by law)  such  custodian  is not  authorized  to make any
deduction from the amount payable to the holder of such depository  receipt from
any amount received by the custodian in respect of the Government Obligations or
the specific  payment of interest on or principal of the Government  Obligations
evidenced by such depository receipt.

     Unless otherwise provided in the applicable Prospectus Supplement, if after
the  Company  has  deposited  funds  and/or  Government  Obligations  to  effect
defeasance or covenant defeasance with respect to Debt Securities of any series,
(i) the holder of a Debt Security of such series is entitled to, and does, elect
pursuant  to the  applicable  Indenture  or the terms of such Debt  Security  to
receive  payment in a currency,  currency unit or composite  currency other than
that in which such  deposit has been made in respect of such Debt  Security,  or
(ii) a Conversion  Event (as defined  below)  occurs in respect of the currency,
currency  unit or composite  currency in which such  deposit has been made,  the
indebtedness represented by such Debt Security shall be deemed to have been, and
will be, fully discharged and satisfied  through the payment of the principal of
(and premium,  if any) and interest on such Debt Security as they become due out
of the proceeds yielded by converting the amount so deposited in respect of such
Debt Security into the  currency,  currency unit or composite  currency in which
such  Debt  Security  becomes  payable  as a  result  of such  election  or such
cessation of usage based on the applicable  market  exchange  rate.  "Conversion
Event" means the cessation of use of (i) a currency,  currency unit or composite
currency  both by the  government  of the country which issued such currency and
for  the  settlement  of   transactions  by  a  central  bank  or  other  public
institutions of or within the international banking community, (ii) the ECU both
within the European  Monetary  System and for the settlement of  transactions by
public institutions of or within the European  Communities or (iii) any currency
unit or composite  currency other than the ECU for the purposes for which it was
established.  Unless otherwise provided in the applicable Prospectus Supplement,
all  payments of  principal  of (and  premium,  if any) and interest on any Debt
Security  that is payable in a foreign  currency  that  ceases to be used by its
government of issuance shall be made in U.S. dollars.

     In the event the Company  effects  covenant  defeasance with respect to any
Debt Securities and such Debt Securities are declared due and payable because of
the occurrence of any event of default other than the event of default described
in clause (d) under  "--Events  of Default,  Notice and Waiver"  with respect to
certain sections of the applicable  Indenture (which sections would no longer be
applicable to such Debt Securities) or described in

                                       10
<PAGE>

clause (g) under  "--Events  of Default,  Notice and Waiver" with respect to any
other  covenant as to which there has been  covenant  defeasance,  the amount in
such currency, currency unit or composite currency in which such Debt Securities
are payable,  and Government  Obligations  on deposit with the Trustee,  will be
sufficient  to pay  amounts  due on such  Debt  Securities  at the time of their
stated  maturity  but may not be  sufficient  to pay  amounts  due on such  Debt
Securities at the time of the acceleration resulting from such event of default.
However,  the Company would remain liable to make payment of such amounts due at
the time of acceleration.

     Notwithstanding the description set forth under "--Subordination" below, in
the  event  that  the  Company  deposits  money  or  Government  Obligations  in
compliance  with the applicable  Indenture in order to defease all or certain of
its  obligations  with  respect to any  Subordinated  Securities,  the moneys or
Government  Obligations  so deposited  will not be subject to the  subordination
provisions of such Indenture and the indebtedness evidenced by such Subordinated
Securities will not be subordinated in right of payment to the holders of senior
indebtedness to the extent of the moneys or Government Obligations so deposited.

     The applicable  Prospectus  Supplement may further describe the provisions,
if any,  permitting  such  defeasance  or  covenant  defeasance,  including  any
modifications  to the  provisions  described  above,  with  respect  to the Debt
Securities of or within a particular series.

Conversion Rights

     The terms and  conditions,  if any,  upon  which  the Debt  Securities  are
convertible  into Common or Preferred Shares will be set forth in the Prospectus
Supplement  relating  thereto.   Such  terms  will  include  whether  such  Debt
Securities are convertible into Common or Preferred Shares, the conversion price
(or manner of  calculation  thereof),  the conversion  period,  provisions as to
whether  conversion  will be at the option of the  holders of the  Company,  the
events requiring an adjustment of the conversion price and provisions  affecting
conversion  in the  event of the  redemption  of such  Debt  Securities  and any
restrictions on conversion,  including  restrictions directed at maintaining the
Company's REIT status.

Subordination

     The terms and conditions,  if any, upon which Subordinated  Securities of a
series  are  subordinated  to  Debt  Securities  of  other  series  or to  other
indebtedness  of the  Company  will be set  forth in the  applicable  Prospectus
Supplement.  Such terms will include a description of the  indebtedness  ranking
senior to such  Subordinated  Securities,  the  restrictions  on payments to the
holders of such  Subordinated  Securities  while a default  with respect to such
senior indebtedness is continuing, the restrictions,  if any, on payments to the
holders of such  Subordinated  Securities  following  an Event of  Default,  and
provisions  requiring holders of such  Subordinated  Securities to remit certain
payments to holders of senior indebtedness.

Global Securities

     If  so  set  forth  in  the  applicable  Prospectus  Supplement,  the  Debt
Securities  of a series  may be issued in whole or in part in the form of one or
more  Global  Securities  that  will be  deposited  with,  or on  behalf  of,  a
depositary  identified in the applicable  Prospectus Supplement relating to such
series.  Global Securities may be issued in either registered or bearer form and
in either  temporary or permanent  form.  The specific  terms of the  depositary
arrangement with respect to any such series of Debt Securities will be described
in the applicable Prospectus Supplement.

                                       11
<PAGE>

                              DESCRIPTION OF SHARES

         The  Declaration  of Trust  ("Declaration")  authorizes  the Company to
issue an aggregate of 175,000,000  shares of beneficial  interest  ("Shares") in
the Company,  including (i) 125,000,000 Common Shares, par value $.01 per share,
and (ii) 50,000,000  Preferred Shares, par value $.01 per share. The Declaration
permits the  Trustees  to amend the  Declaration  to  increase  or decrease  the
authorized  Shares  of  the  Company  without  the  requirement  of  shareholder
approval.

     The Declaration authorizes the Trustees, without shareholder approval, from
time to time to divide the  Preferred  Shares into  classes or series and to set
(or  change,  if the class or series has been  previously  established)  the par
value,  if  any,  preferences,   conversion  or  other  rights,  voting  powers,
restrictions,   limitations  as  to  dividends,   qualifications  or  terms  and
conditions of redemption of such  Preferred  Shares as are not prohibited by the
Declaration or applicable  law. In connection with the adoption of the Company's
shareholders  rights plan (see  "Redemption;  Business  Combinations and Control
Share  Acquisitions  --  Rights  Plan,"  below),  the  Trustees  established  an
authorized but unissued class of 1,000,000  Preferred Shares, par value $.01 per
share (the "Junior Participating Preferred Shares"),  described more fully below
under  "Description  of  Preferred  Shares  --  Junior  Participating  Preferred
Shares," and as of May 1, 1997 no other class or series of Preferred  Shares had
been established.  The Trustees have under  consideration a proposal to increase
the number of authorized but unissued Junior Participating Preferred Shares from
1,000,000 to 1,250,000,  and the Company  expects such proposal to be adopted at
the annual meeting of the Trustees currently scheduled for May 13, 1997.

     As of May 1, 1997 there were 98,703,918  Shares  outstanding,  all of which
were Common  Shares.  The Company  also had  outstanding  as of such date $211.7
million  aggregate  principal  amount  convertible  subordinated  debentures  of
various series,  all of which are convertible  into Common Shares at an exercise
price  equal on such date to $18 per  share.  See  "Description  of  Convertible
Subordinated Debentures."

     The  following  descriptions  do not purport to be complete and are subject
to,  and  qualified  in their  entirety  by  reference  to,  the  more  complete
descriptions thereof set forth in the Declaration. Capitalized terms not defined
herein are as defined in the Declaration.

     Except as otherwise determined by the Trustees with respect to any class or
series  of  Preferred  Shares,  all  Shares:  (i) will  participate  equally  in
dividends  payable to shareholders  when, as and if declared by the Trustees and
ratably in net assets  available for distribution to shareholders on liquidation
or dissolution;  (ii) will have one vote per share on all matters submitted to a
vote of the  shareholders,  (iii) will not have cumulative  voting rights in the
election of Trustees;  and (iv) will have no preference,  conversion,  exchange,
sinking fund, redemption rights or preemptive or similar rights.

     Upon issuance in accordance  with the  Declaration,  applicable law and the
terms and conditions described in the related Prospectus Supplement,  the Shares
will be  fully  paid  and  nonassessable.  The  holders  of  Shares  do not have
preemptive  rights with  respect to the issuance of  additional  Shares or other
securities of the Company.

     The authorized but unissued Shares will be available for issuance from time
to time by the Company at the sole  discretion  of the  Trustees  for any proper
trust purpose,  which could include raising capital,  providing  compensation or
benefits to employees and others, paying stock dividends or acquiring companies,
businesses or  properties.  The issuance of such unissued  Shares could have the
effect of diluting  the earnings per share and book value per share of currently
outstanding Shares.

     For certain other  information with respect to the Shares,  see "Limitation
of Liabilities;  Shareholder  Liability" and "Redemption;  Business Combinations
and Control Share Acquisitions" below.

                                       12
<PAGE>

                         DESCRIPTION OF PREFERRED SHARES

     The Declaration authorizes the Trustees, without shareholder approval, from
time to time to divide the  Preferred  Shares into  classes or series and to set
(or  change,  if the class or series has been  previously  established)  the par
value,  if  any,  preferences,   conversion  or  other  rights,  voting  powers,
restrictions,   limitations  as  to  dividends,   qualifications  or  terms  and
conditions of redemption of such Preferred Shares that are not prohibited by the
Declaration or applicable law.

     The  following  description  of the  Preferred  Shares  sets forth  certain
general terms and  provisions of the  Preferred  Shares to which any  Prospectus
Supplement  may relate and a brief  summary  of certain  terms of the  Company's
Junior  Participating  Preferred  Shares.  The statements  below  describing the
Preferred  Shares are in all respects subject to and qualified in their entirety
by reference to the  applicable  provisions of the  Declaration  (including  any
applicable articles supplementary) and By-Laws.

General

     Subject to limitations prescribed by Maryland law and the Declaration,  the
Trustees are authorized to fix the number of shares  constituting each series of
Preferred  Shares and the  designations  and powers,  preferences  and relative,
participating, optional or other specific rights and qualifications, limitations
or restrictions thereof,  including such provisions as may be desired concerning
voting,  redemption,  dividends,  dissolution  or the  distribution  of  assets,
conversion  or exchange,  and such other  subjects or matters as may be fixed by
resolutions of the Trustees.

     Reference is made to the  Prospectus  Supplement  relating to the Preferred
Shares offered thereby for specific terms, including:

     (1)  the title of such Preferred Shares;

     (2)  the number of shares of such Preferred Shares offered,  the par value,
          the  liquidation  preference  per share and the offering price of such
          Preferred Shares;

     (3)  the dividend rate(s), period(s) and/or payment date(s) or method(s) of
          calculation thereof applicable to such Preferred Shares;

     (4)  the  date  from  which  dividends  on  such  Preferred   Shares  shall
          accumulate, if applicable;

     (5)  the  procedures  for any auction  and  remarketing,  if any,  for such
          Preferred Shares;

     (6)  the provision for a sinking fund, if any, for such Preferred Shares;

     (7)  the provision for redemption, if applicable, of such Preferred Shares;

     (8)  any listing of such Preferred Shares on any securities exchange;

     (9)  the terms and  conditions,  if  applicable,  upon which such Preferred
          Shares  will be  convertible  into  Common  Shares of the  Company  or
          another series of Offered  Securities,  including the conversion price
          (or manner of calculation thereof);

     (10) whether  interests in such  Preferred  Shares will be  represented  by
          Depositary Shares as more fully described below under  "Description of
          Depositary Shares";

     (11) any  other  specific  terms,  preferences,   rights,   limitations  or
          restrictions of such Preferred Shares;

                                       13
<PAGE>

     (12) a discussion of federal income tax  considerations  applicable to such
          Preferred Shares;

     (13) the relative  ranking and  preferences of such Preferred  Shares as to
          dividend rights and rights upon liquidation, dissolution or winding up
          of the affairs of the Company;

     (14) any limitations on issuance of any series of Preferred  Shares ranking
          senior to or on a parity  with such series of  Preferred  Shares as to
          dividend rights and rights upon liquidation, dissolution or winding up
          of the affairs of the Company; and

     (15) any limitations on direct or beneficial  ownership and restrictions on
          transfer.

     As described under "Description of Depositary  Shares," the Company may, at
its option,  elect to offer Depositary  Shares evidenced by depositary  receipts
("Depositary  Receipts"),   each  representing  a  fractional  interest  (to  be
specified in the Prospectus  Supplement relating to the particular series of the
Preferred  Shares) in a share of the particular  series of the Preferred  Shares
issued and deposited with a Depositary (as defined below).

Rank

     Unless otherwise determined by the Trustees and specified in the applicable
Prospectus  Supplement,  it is expected  that the  Preferred  Shares will,  with
respect to dividend rights and rights upon  liquidation,  dissolution or winding
up of the  Company,  rank (i)  senior to all  Common  Shares,  and to all equity
securities  ranking junior to such Preferred  Shares;  (ii) on a parity with all
equity securities issued by the Company the terms of which specifically  provide
that such equity  securities  rank on a parity with the  Preferred  Shares;  and
(iii) junior to all equity  securities  issued by the Company the terms of which
specifically  provide that such equity  securities  rank senior to the Preferred
Shares.

Dividends

     Holders of  Preferred  Shares of each series  shall be entitled to receive,
when, as and if declared by the Trustees,  out of assets of the Company  legally
available for payment, cash dividends at such rates and on such dates as will be
set forth in the applicable Prospectus  Supplement.  Each such dividend shall be
payable to holders of record as they appear on the stock  transfer  books of the
Company (or, if applicable,  on the records of the Depositary  referred to below
under "Description of Depositary Shares") on such record dates as shall be fixed
by the Trustees.

     Dividends  on any  series of the  Preferred  Shares  may be  cumulative  or
noncumulative,  as provided in the applicable Prospectus Supplement.  Dividends,
if  cumulative,  will be  cumulative  from and  after  the date set forth in the
applicable  Prospectus  Supplement.  If the Trustees  fail to declare a dividend
payable on a dividend  payment  date on any series of the  Preferred  Shares for
which  dividends  are  noncumulative,  then the  holders  of such  series of the
Preferred  Shares  will have no right to  receive a  dividend  in respect of the
dividend period ending on such dividend  payment date, and the Company will have
no  obligation  to pay the  dividend  accrued  for such  period,  whether or not
dividends on such series are  declared  payable on any future  dividend  payment
date.

     If Preferred Shares of any series are outstanding,  no full dividends shall
be  declared  or paid or set apart for  payment on the  Preferred  Shares of the
Company of any other series ranking, as to dividends, on a parity with or junior
to the Preferred  Shares of such series for any period unless (i) if such series
of Preferred Shares has a cumulative  dividend,  full cumulative  dividends have
been or contemporaneously are declared and paid or declared and a sum sufficient
for the payment  thereof set apart for such payment on the  Preferred  Shares of
such series for all past dividend  periods and the then current  dividend period
or (ii) if such series of Preferred Shares does not have a cumulative  dividend,
full   dividends   for  the  then   current   dividend   period   have  been  or
contemporaneously are declared and paid or declared and a sum sufficient for the
payment  thereof  set apart for such  payment  on the  Preferred  Shares of such
series.  When  dividends are not paid in full (or a sum sufficient for such full
payment is

                                       14
<PAGE>

not so set apart) upon the Preferred  Shares of any series and the shares of any
other series of Preferred  Shares  ranking on a parity as to dividends  with the
Preferred Shares of such series, all dividends declared upon Preferred Shares of
such series and any other series of Preferred  Shares shall in all cases bear to
each other the same  ratio that  accrued  dividends  per share on the  Preferred
Shares of such series  (which shall not include any  accumulation  in respect of
unpaid dividends for prior dividend periods if such Preferred Shares do not have
a cumulative  dividend)  and such other series of Preferred  Shares bear to each
other.  No interest,  or sum of money in lieu of  interest,  shall be payable in
respect of any dividend  payment or payments on Preferred  Shares of such series
which may be in arrears.

     Except as provided in the immediately  preceding  paragraph,  unless (i) if
such series of  Preferred  Shares has a  cumulative  dividend,  full  cumulative
dividends on the Preferred Shares of such series have been or  contemporaneously
are declared and paid or declared and a sum sufficient for the repayment thereof
set  apart  for  payment  for all past  dividend  periods  and the then  current
dividend  period,  and (ii) if such series of  Preferred  Shares does not have a
cumulative dividend,  full dividends on the Preferred Shares of such series have
been or contemporaneously are declared and paid or declared and a sum sufficient
for the payment  thereof set apart for  payment  for the then  current  dividend
period, no dividends (other than in Common Shares or other capital stock ranking
junior  to the  Preferred  Shares  of  such  series  as to  dividends  and  upon
liquidation)  shall  be  declared  or paid or set  aside  for  payment  or other
distribution  shall be  declared  or made  upon the  Common  Shares or any other
capital stock of the Company ranking junior to or on a parity with the Preferred
Shares of such series as to dividends or upon liquidation,  nor shall any Common
Shares or any  other  capital  stock of the  Company  ranking  junior to or on a
parity  with  the  Preferred  Shares  of such  series  as to  dividends  or upon
liquidation be redeemed,  purchased or otherwise  acquired for any consideration
(or any  moneys  be  paid  to or  made  available  for a  sinking  fund  for the
redemption of any shares of any such stock) by the Company (except by conversion
into or exchange for other  capital stock of the Company  ranking  junior to the
Preferred  Shares of such series as to dividends and upon liquidation and except
pursuant to certain pro rata offers to purchase or a  concurrent  redemption  of
all, or a pro rata portion of, the outstanding shares of the Preferred Shares of
such series and any other  series of Preferred  Shares  ranking on a parity with
such series as to dividends and liquidation).

     Any dividend  payment made on shares of a series of Preferred  Shares shall
first be credited  against the  earliest  accrued but unpaid  dividend  due with
respect to shares of such series which remains payable.

Redemption

     If so provided  in the  applicable  Prospectus  Supplement,  the  Preferred
Shares will be subject to mandatory  redemption  or  redemption at the option of
the Company,  as a whole or in part,  in each case upon the terms,  at the times
and at the redemption prices set forth in such Prospectus Supplement.

     The Prospectus  Supplement relating to a series of Preferred Shares that is
subject to mandatory redemption will specify the number of such Preferred Shares
that shall be redeemed by the Company in each year commencing after a date to be
specified,  at a redemption  price per share to be  specified,  together with an
amount equal to all accrued and unpaid  dividends  thereon  (which shall not, if
such  Preferred  Shares  do  not  have  a  cumulative   dividend,   include  any
accumulation in respect of unpaid  dividends for prior dividend  periods) to the
date of  redemption.  The  redemption  price  may be  payable  in cash or  other
property,  as  specified  in  the  applicable  Prospectus  Supplement.   If  the
redemption price for Preferred Shares of any series is payable only from the net
proceeds of the  issuance  of capital  stock of the  Company,  the terms of such
Preferred  Shares may provide  that,  if no such  capital  stock shall have been
issued or to the extent the net proceeds from any issuance are  insufficient  to
pay in full the aggregate redemption price then due, such Preferred Shares shall
automatically and mandatorily be converted into shares of the applicable capital
stock  of  the  Company  pursuant  to  conversion  provisions  specified  in the
applicable Prospectus Supplement.

     Notwithstanding  the  foregoing,  unless  (i) if such  series of  Preferred
Shares has a cumulative dividend, full cumulative dividends on all shares of any
series of Preferred Shares shall have been or contemporaneously are

                                       15
<PAGE>

declared and paid or declared and a sum sufficient  for the payment  thereof set
apart for payment for all past  dividend  periods and the then current  dividend
period,  and (ii) if such series of Preferred  Shares does not have a cumulative
dividend,  full  dividends  on the  Preferred  Shares of any series have been or
contemporaneously are declared and paid or declared and a sum sufficient for the
payment thereof set apart for payment for the then current dividend  period,  no
shares  of  any  series  of  Preferred  Shares  shall  be  redeemed  unless  all
outstanding  Preferred  Shares  of  such  series  are  simultaneously  redeemed;
provided,  however,  that the  foregoing  shall  not  prevent  the  purchase  or
acquisition  of  Preferred  Shares of such  series  pursuant  to a  purchase  or
exchange  offer made on the same terms to holders of all  outstanding  Preferred
Shares of such series,  and, unless (i) if such series of Preferred Shares has a
cumulative dividend,  full cumulative dividends on all outstanding shares of any
series of Preferred Shares have been or contemporaneously  are declared and paid
or declared and a sum sufficient  for the payment  thereof set apart for payment
for all past dividend periods and the then current dividend period,  and (ii) if
such  series of  Preferred  Shares  does not have a  cumulative  dividend,  full
dividends on the Preferred  Shares of any series have been or  contemporaneously
are declared and paid or declared and a sum sufficient  for the payment  thereof
set apart for payment for the then current  dividend  period,  the Company shall
not purchase or otherwise acquire directly or indirectly any Preferred Shares of
such series  (except by  conversion  into or exchange  for capital  stock of the
Company  ranking  junior to the Preferred  Shares of such series as to dividends
and upon liquidation).

     If fewer than all of the outstanding  Preferred Shares of any series are to
be redeemed, the number of Preferred Shares to be redeemed will be determined by
the Company and such shares may be redeemed  pro rata from the holders of record
of such shares in  proportion  to the number of such shares held by such holders
(with adjustments to avoid redemption of fractional  shares) or by lot in manner
determined by the Company.

     Notice of  redemption  will be mailed at least 30 days but not more than 60
days before the redemption date to each holder of record of Preferred  Shares of
any series to be redeemed at the address  shown on the stock  transfer  books of
the Company.  Each notice shall state:  (i) the redemption date; (ii) the number
of  shares  and  series  of the  Preferred  Shares  to be  redeemed;  (iii)  the
redemption price; (iv) the place or places where certificates for such Preferred
Shares are to be  surrendered  for  payment of the  redemption  price;  (v) that
dividends on the shares to be redeemed  will cease to accrue on such  redemption
date; and (vi) the date upon which the holder's conversion rights, if any, as to
such  shares  shall  terminate.  If fewer than all the  Preferred  Shares of any
series are to be redeemed,  the notice mailed to each such holder  thereof shall
also  specify  the  number of  Preferred  Shares to be  redeemed  from each such
holder.  If notice of redemption  of any Preferred  Shares has been given and if
the funds  necessary for such  redemption  have been set aside by the Company in
trust for the  benefit of the holders of any of the  Preferred  Shares so called
for redemption,  then from and after the redemption date dividends will cease to
accrue on such Preferred  Shares,  and any and all rights of the holders of such
shares will terminate, except the right to receive the redemption price.

Liquidation Preference

     Upon any voluntary or involuntary liquidation, dissolution or winding up of
the affairs of the Company,  then,  before any  distribution or payment shall be
made to the holders of any Common Shares or any other class or series of capital
stock of the Company ranking junior to the Preferred  Shares in the distribution
of assets upon any  liquidation,  dissolution or winding up of the Company,  the
holders of each series of  Preferred  Shares shall be entitled to receive out of
assets  of the  Company  legally  available  for  distribution  to  shareholders
liquidating  distributions in the amount of the liquidation preference per share
(set forth in the applicable Prospectus Supplement), plus an amount equal to all
dividends  accrued and unpaid thereon (which shall not include any  accumulation
in respect of unpaid  dividends  for prior  dividend  periods if such  Preferred
Shares do not have a cumulative  dividend).  After payment of the full amount of
the  liquidating  distributions  to which  they are  entitled,  the  holders  of
Preferred  Shares will have no right or claim to any of the remaining  assets of
the  Company.  In  the  event  that  upon  any  such  voluntary  or  involuntary
liquidation,  dissolution or winding up, the available assets of the Company are
insufficient  to  pay  the  amount  of  the  liquidating  distributions  on  all
outstanding Preferred Shares and the corresponding amounts payable on all shares
of other classes or series of capital  stock of the Company  ranking on a parity
with the Preferred Shares in the distribution of assets, then the holders of the
Preferred Shares and all

                                       16
<PAGE>

other such  classes or series of capital  stock shall share  ratably in any such
distribution of assets in proportion to the full  liquidating  distributions  to
which they would otherwise be respectively entitled.

     If liquidating distributions shall have been made in full to all holders of
Preferred Shares, the remaining assets of the Company shall be distributed among
the holders of any other classes or series of capital  stock  ranking  junior to
the Preferred Shares upon  liquidation,  dissolution or winding up, according to
their  respective  rights and  preferences  and in each case  according to their
respective number of shares.  For such purposes,  the consolidation or merger of
the Company with or into any other trust or corporation,  or the sale,  lease or
conveyance  of all or  substantially  all of the  property  or  business  of the
Company, shall not be deemed to constitute a liquidation, dissolution or winding
up of the Company.

Voting Rights

     Holders of the Preferred Shares will not have any voting rights,  except as
set  forth  below  or as  otherwise  from  time  to time  required  by law or as
indicated in the applicable Prospectus Supplement.

     Unless otherwise  specified in the related  Prospectus  Supplement,  at any
time dividends on any Preferred  Shares shall be in arrears for six  consecutive
quarterly periods,  the holders of such Preferred Shares (voting separately as a
class with all other  series of preferred  shares upon which like voting  rights
have  been  conferred  and are  exercisable)  will be  entitled  to vote for the
election of two additional trustees of the Company at the next annual meeting of
shareholders  and at  each  subsequent  meeting  until  (i) if  such  series  of
Preferred Shares has a cumulative  dividend,  all dividends  accumulated on such
Preferred  Shares for the past  dividend  periods and the then current  dividend
period  shall have been  fully paid or  declared  and a sum  sufficient  for the
payment thereof set aside for payment or (ii) if such series of Preferred Shares
does not have a cumulative dividend,  four consecutive quarterly dividends shall
have been fully paid or declared and a sum  sufficient  for the payment  thereof
set aside for payment.  In such case, the entire Trustees of the Company will be
increased by two trustees.

     Unless provided  otherwise for any series of Preferred  Shares,  so long as
any Preferred  Shares  remain  outstanding,  the Company shall not,  without the
affirmative  vote or consent of the  holders of a majority of the shares of each
series of Preferred Shares outstanding at the time, given in person or by proxy,
either in writing or at a meeting  (such series  voting  separately as a class),
(i)  authorize or create,  or increase the  authorized  or issued amount of, any
class or series of  capital  stock  ranking  prior to such  series of  Preferred
Shares with respect to payment of dividends or the  distribution  of assets upon
liquidation,  dissolution or winding up, or reclassify  any  authorized  capital
stock of the Company  into any such  shares,  or create,  authorize or issue any
obligation or security  convertible into or evidencing the right to purchase any
such shares; or (ii) amend, alter or repeal the provisions of the Declaration or
the certificate of designations for such series of Preferred Shares,  whether by
merger, consolidation or otherwise, so as to materially and adversely affect any
right, preference,  privilege or voting power of such series of Preferred Shares
or the holders thereof;  provided,  however,  that any increase in the amount of
the authorized  Preferred Shares or the creation or issuance of any other series
of Preferred  Shares, or any increase in the amount of authorized shares of such
series or any other series of Preferred Shares, in each case ranking on a parity
with or junior to the Preferred Shares of such series with respect to payment of
dividends or the distribution of assets upon liquidation, dissolution or winding
up,  shall  not be  deemed to  materially  and  adversely  affect  such  rights,
preferences, privileges or voting powers.

     The foregoing voting  provisions will not apply if, at or prior to the time
when the act with respect to which such vote would  otherwise be required  shall
be effected,  all  outstanding  shares of such series of Preferred  Shares shall
have been redeemed or called for redemption and sufficient funds shall have been
deposited in trust to effect such redemption.

     As more fully described under  "Description of Depositary Shares" below, if
the Company elects to issue Depositary  Shares,  each representing a fraction of
share of a series of the Preferred Shares,  each such Depositary will, in effect
be entitled to such fraction of a vote per Depositary Share.

                                       17
<PAGE>

Conversion Rights

     The  terms and  conditions,  if any,  upon  which  shares of any  series of
Preferred Shares may be converted into or exchanged for Common Shares or another
series of  Preferred  Shares or other series of Offered  Securities  will be set
forth in the Prospectus Supplement relating thereto. Such terms will include the
number of Common Shares or other  securities  into which the Preferred  Share is
convertible  or  exchangeable,  conversion  or  exchange  price  (or  manner  of
calculation  thereof),  the  conversion  or exchange  period,  provisions  as to
whether  conversion  or  exchange  will be at the  option of the  holders of the
Preferred  Shares or the  Company,  the events  requiring an  adjustment  of the
conversion or exchange price and provisions  affecting conversion or exchange in
the event of the redemption such Preferred Shares.

Junior Participating Preferred Shares

     In connection with the adoption of the Company's  shareholders rights plan,
the Trustees established an authorized but unissued class of 1,000,000 Preferred
Shares. See "Redemption;  Business  Combinations and Control Share Acquisitions"
below.  The Trustees have under  consideration a proposal to increase the number
of authorized but unissued Junior Participating  Preferred Shares from 1,000,000
to 1,250,000,  and the Company expects such proposal to be adopted at the annual
meeting of the Trustees  currently  scheduled for May 13, 1997.  Certain powers,
preferences and rights and certain qualifications,  limitations and restrictions
of the  Junior  Participating  Preferred  Shares,  when  and if  issued,  are as
follows. The statements below with respect to the Junior Participating Preferred
Shares  are in all  respects  subject  to and  qualified  in their  entirety  by
reference  to the  applicable  provisions  of  the  Declaration  (including  the
applicable articles supplementary) and By-Laws.

     The holder of each  Junior  Participating  Preferred  Share is  entitled to
quarterly  dividends in the greater  amount of $5.00 or 100 times the  quarterly
per share dividend, whether cash or otherwise,  declared upon the Common Shares.
Dividends on the Junior Participating Preferred Shares are cumulative.  Whenever
dividends  on the Junior  Participating  Preferred  Shares are in  arrears,  the
Company,  among other things,  is prohibited from declaring or paying dividends,
making other  distributions  on, or redeeming or  repurchasing  Common Shares or
other Shares ranking junior to the Junior  Participating  Preferred Shares,  and
upon failure of the Company to pay such dividends for six quarters,  the holders
of the Junior  Participating  Preferred  Shares  will be  entitled  to elect two
Trustees. The holder of each Junior Participating Preferred Share is entitled to
100 votes on all matters submitted to a vote of the shareholders, voting (unless
otherwise provided in the Declaration or by law) together with holders of Common
Shares as one class. Upon liquidation, dissolution or winding up of the Company,
the  holders  of  Junior  Participating  Preferred  Shares  are  entitled  to  a
liquidation  preference  of $100 per share  plus the amount of any  accrued  and
unpaid dividends and distributions thereon (the "Liquidation Preference"), prior
to payment  of any  distribution  in  respect of the Common  Shares or any other
Shares ranking junior to the Junior  Participating  Preferred Shares.  Following
payment of the  Liquidation  Preference,  the  holders  of Junior  Participating
Preferred Shares are not entitled to further  distributions until the holders of
Common  Shares  shall  have  received  an amount per share  (the  "Common  Share
Adjustment")  equal to the  Liquidation  Preference  divided by 100 (adjusted to
reflect  events such as stock  splits,  stock  dividends  and  recapitalizations
affected the Common Shares) (the "Adjustment Number").  Following the payment of
the full amount of the Liquidation  Preference and the Common Share  Adjustment,
holders of Junior  Participating  Preferred  Shares are entitled to  participate
proportionately  on a per share  basis  with  holders  of  Common  Shares in the
distribution  of the remaining  assets to be distributed in respect of Shares in
the ratio of the Adjustment Number to one, respectively. The powers, preferences
and  rights of the Junior  Participating  Preferred  Shares  are  subject to the
superior  powers,  preferences  and  rights  of any  senior  series  or class of
Preferred  Shares which the Trustees  shall,  from time to time,  authorize  and
issue.

                                       18
<PAGE>

                        DESCRIPTION OF DEPOSITARY SHARES

General

     The description set forth below and in any applicable Prospectus Supplement
of certain  provisions of any Deposit  Agreement  (as defined  below) and of the
Depositary  Shares  and  depositary  receipts  representing   Depositary  Shares
("Depositary  Receipts")  does not purport to be complete  and is subject to and
qualified in its entirety by  reference  to the forms of Deposit  Agreement  and
Depositary  Receipts  relating to each series of the Preferred Shares which have
been or will be  filed  with  the  Commission  at or  prior  to the  time of the
offering of such series of the Preferred Shares.

     The Company  may, at its option,  elect to offer  fractional  interests  in
shares of Preferred Shares, rather than shares of Preferred Shares. In the event
such  option is  exercised,  the  Company  will  provide  for the  issuance by a
Depositary (as defined  below) to the public of receipts for Depositary  Shares,
each of which  will  represent  a  fractional  interest  to be set  forth in the
Prospectus  Supplement  relating to a particular  series of the Preferred Shares
which will be filed with the  Commission at or prior to the time of the offering
of such series of the Preferred Shares as described  below.  Preferred Shares of
each series  represented by Depositary Shares will be deposited under a separate
deposit  agreement  (each,  a "Deposit  Agreement")  among the  Company  and the
depositary named therein (a "Depositary"). The Prospectus Supplement relating to
a series  of  Depositary  Shares  will set  forth  the name and  address  of the
Depositary. Subject to the terms of the applicable Deposit Agreement, each owner
of a Depositary Share will be entitled, in proportion to the fractional interest
of a share of a  particular  series  of  Preferred  Shares  represented  by such
Depositary  Share to all the  rights and  preferences  of the  Preferred  Shares
represented by such Depositary Shares (including dividend,  voting,  conversion,
redemption and liquidation rights).

     The  Depositary  Shares will be evidenced  by  Depositary  Receipts  issued
pursuant to the  applicable  Deposit  Agreement.  Upon  surrender of  Depositary
Receipts  at the  office  of the  Depositary  and upon  payment  of the  charges
provided in the Deposit Agreement and subject to the terms thereof,  a holder of
Depositary Shares is entitled to have the Depositary  deliver to such holder the
whole shares of Preferred Shares  underlying the Depositary  Shares evidenced by
the surrendered Depositary Receipts.

Dividends and Other Distributions

     A Depositary  will be required to  distribute  all cash  dividends or other
cash distributions received in respect of the applicable Preferred Shares to the
record holders of Depositary  Receipts  evidencing the related Depositary Shares
in proportion to the number of such  Depositary  Receipts owned by such holders,
subject to certain obligations of holders to file proofs, certificates and other
information  and to  pay  certain  charges  and  expenses  to  such  Depositary.
Fractions will be rounded down to the market whole cent.

     In the event of a  distribution  other than in cash, a  Depositary  will be
required  to  distribute  property  received  by it to  the  record  holders  of
Depositary Receipts entitled thereto,  subject to certain obligations of holders
to file proofs,  certificates  and other  information and to pay certain charges
and expenses to such  Depositary,  unless such Depositary  determines that it is
not feasible to make such distribution,  in which case such Depositary may, with
the approval of the Company,  sell such property and distribute the net proceeds
from such sale to such holders.

     No  distributions  will be made in respect of any  Depositary  Share to the
extent that it  represents  any  Preferred  Shares which have been  converted or
exchanged.  The Deposit Agreement will also contain  provisions  relating to the
manner in which any  subscription  or similar  rights  offered by the Company to
holders of the Preferred Shares shall be made available to holders of Depositary
Shares.
                                       19
<PAGE>

Redemption of Depositary Shares

     If a series of the Preferred  Shares  underlying the  Depositary  Shares is
subject to redemption,  the Depositary Shares will be redeemed from the proceeds
received by the Depositary  resulting from the redemption,  in whole or in part,
of such series of the Preferred  Shares held by the  Depositary.  The Depositary
shall mail notice of redemption not less than 30 and not more than 60 days prior
to the date  fixed  for  redemption  to the  record  holders  of the  Depositary
Receipts  evidencing the Depositary Shares to be so redeemed at their respective
addresses  appearing  in  the  Depositary's  books.  The  redemption  price  per
Depositary  Share will be equal to the  applicable  fraction  of the  redemption
price per share  payable  with respect to such series of the  Preferred  Shares.
Whenever the Company redeems shares of Preferred  Shares held by the Depositary,
the  Depositary  will  redeem  as of the  same  redemption  date the  number  of
Depositary  Shares relating to shares of Preferred  Shares so redeemed.  If less
than all of the Depositary  Shares are to be redeemed,  the Depositary Shares to
be  redeemed  will be selected  by lot or pro rata as may be  determined  by the
Depositary.

     After the date fixed for  redemption,  the Depositary  Shares so called for
redemption  will no longer be deemed  to be  outstanding  and all  rights of the
holders of the Depositary Shares and the related Depositary Receipts will cease,
except the right to receive  the moneys  payable  upon such  redemption  and any
money or other  property  to which the  holders of such  Depositary  Shares were
entitled upon such redemption upon surrender to the Depositary of the Depositary
Receipts evidencing such Depositary Shares.

Voting of the Preferred Shares

     Upon  receipt  of  notice  of any  meeting  at  which  the  holders  of the
applicable  Preferred Shares are entitled to vote, a Depositary will be required
to mail the  information  contained  in such  notice of  meeting  to the  record
holders of the  Depositary  Receipts  evidencing  the  Depositary  Shares  which
represent  such  Preferred  Shares.  Each record holder of  Depositary  Receipts
evidencing  Depositary Shares on the record date (which will be the same date as
the record date for the  Preferred  Shares)  will be  entitled to instruct  such
Depositary as to the exercise of the voting  rights  pertaining to the amount of
Preferred Shares represented by such holder's Depositary Shares. Such Depositary
will  endeavor,  insofar as  practical,  to vote the amount of Preferred  Shares
represented by such Depositary Shares in accordance with such instructions,  and
the  Company  will  agree to take all  reasonable  action  which  may be  deemed
necessary by such  Depositary in order to enable such  Depositary to do so. Such
Depositary  will be  required  to abstain  from  voting the amount of  Preferred
Shares  represented by such Depositary  Shares to the extent it does not receive
specific  instructions from the holders of Depositary  Receipts  evidencing such
Depositary  Shares.  The Depositary  will not be responsible  for any failure to
carry out any  instruction to vote, or for the manner or effect of any such vote
made,  as long as such action or non-action is in good faith and does not result
from gross negligence or willful misconduct of such Depositary.

Liquidation Preference

     In the event of the liquidation,  dissolution or winding up of the Company,
whether  voluntary or involuntary,  the holders of each Depositary Share will be
entitled to the fraction of the liquidation  preference  accorded each Preferred
Share  represented  by such  Depositary  Share,  as set forth in the  applicable
Prospectus Supplement.

Conversion of Preferred Shares

     The  Depositary   Shares,   as  such,  will  not  be  convertible  into  or
exchangeable  for Common  Shares,  Preferred  Shares or any other  securities or
property  of the  Company.  Nevertheless,  if so  specified  in  the  applicable
Prospectus  Supplement  relating  to  an  offering  of  Depositary  Shares,  the
Depositary  Receipts may be  surrendered  by holders  thereof to the  applicable
Depositary with written  instructions to such Depositary to instruct the company
to cause  conversion  or exchange of the  Preferred  Shares  represented  by the
Depositary Share evidenced by such Depositary Receipts into Common Shares, other
shares of Preferred Shares of the Company or such other securities

                                       20
<PAGE>

as shall be provided  therein,  and the Company  will agree that upon receipt of
such instruction and any amounts payable in respect  thereof,  it will cause the
conversion or exchange  thereof  utilizing the same procedures as those provided
for delivery of Preferred  Shares to effect such conversion or exchange.  If the
Depositary Shares evidenced by a Depositary  Receipt are to be converted in part
only, a new  Depositary  Receipt or  Depositary  Receipts will be issued for any
Depositary Shares not to be converted.

Amendment and Termination of a Deposit Agreement

     Any  form  of  Depositary  Receipt  evidencing  Depositary  Shares  and any
provision of a Deposit  Agreement will be permitted at any time to be amended by
agreement  between the  Company  and the  applicable  Depositary.  However,  any
amendment  that  materially  and  adversely  alters the rights of the holders of
Depositary  Shares will not be effective unless such amendment has been approved
by the  existing  holders of at least a majority  of the  applicable  Depositary
Shares then outstanding.  Every holder of an outstanding  Depositary  Receipt at
the time any such amendment  becomes effective shall be deemed, by continuing to
hold such Depositary  Receipt,  to consent and agree to such amendment and to be
bound by the applicable Deposit Agreement as amended thereby.

     Any Deposit  Agreement  may be terminated by the Company upon not less than
30  days'  prior  written  notice  to the  applicable  Depositary  if  (i)  such
termination  is necessary to preserve the  Company's  status as a REIT or (ii) a
majority  of each  series  of  Preferred  Shares  affected  by such  termination
consents to such  termination,  whereupon  such  Depositary  will be required to
deliver or make available to each holder of Depositary Receipts,  upon surrender
of the  Depositary  Receipts  held by such  holder,  such  number  of  whole  or
fractional  Preferred  Shares  as  are  represented  by  the  Depositary  Shares
evidenced by such Depositary  Receipts  together with any other property held by
such  Depositary  with receipts to such  Depositary  Receipts.  The Company will
agree in each Depositary  Agreement that if such Deposit Agreement is terminated
to preserve the Company's  status as a REIT,  then the Company will use its best
efforts to list the  Preferred  Shares  issued  upon  surrender  of the  related
Depositary  Shares on a national  securities  exchange.  In addition,  a Deposit
Agreement will automatically  terminate if (i) all outstanding Depositary Shares
thereunder  shall  have  been  redeemed;  (ii)  there  shall  have  been a final
distribution in respect of the related  Preferred  Shares in connection with any
liquidation,  dissolution  or winding up of the  Company  and such  distribution
shall have been distributed to the holders of Depositary Receipts evidencing the
Depositary Shares underlying such Preferred Shares; or (iii) each of the related
Preferred  Shares shall have been converted or exchanged into  securities not so
represented by Depositary Shares.

Charges of a Depositary

     The Company will pay all transfer and other taxes and governmental  charges
arising  solely from the  existence of a Deposit  Agreement.  In  addition,  the
Company will pay the fees and expenses of a Depositary  in  connection  with the
initial deposit of the Preferred Shares and any redemption of Preferred  Shares.
However,  holders  of  Depositary  Receipts  will  pay  any  transfer  or  other
governmental  charges and the fees and expenses of a  Depositary  for any duties
requested by such holders to be performed  which are outside of those  expressly
provided for in the applicable Deposit Agreement.

Resignation and Removal of Depositary

     A Depositary  may resign at any time by delivering to the Company notice of
its election to do so, and the Company may at any time remove a Depositary,  any
such  resignation or removal to take effect upon the  appointment of a successor
Depositary.  A successor  Depositary will be required to be appointed  within 60
days after delivery of the notice of resignation or removal and will be required
to be a bank or trust company  having its principal  office in the United States
and having a combined capital and surplus of at least $50 million.

                                       21
<PAGE>

Miscellaneous

     A Depositary will be required to forward to holders of Depositary  Receipts
any  reports and  communications  from the  Company  which are  received by such
Depositary with respect to the related Preferred Shares.

     Neither  Depositary  nor the Company will be liable if it is prevented from
or delayed in, by law or any  circumstances  beyond its control,  performing its
obligations  under a Deposit  Agreement.  The  obligations  of the Company and a
Depositary under a Deposit  Agreement will be limited to performing their duties
thereunder in good faith and without gross negligence or willful misconduct, and
neither the Company nor any applicable Depositary will be obligated to prosecute
or defend any legal proceeding in respect of any Depositary Receipts, Depositary
Shares or Preferred Shares represented thereby unless satisfactory  indemnity is
furnished.  The Company and any Depositary  will be permitted to rely on written
advice of counsel or accountants,  on information provided by persons presenting
Preferred Shares represented thereby for deposit, holders of Depositary Receipts
or  other  persons  believed  in  good  faith  to  be  competent  to  give  such
information, and on documents believed in good faith to be genuine and signed by
a proper party.

     In the event a Depositary  shall receive  conflicting  claims,  requests or
instructions from any holders of Depositary  Receipts,  on the one hand, and the
Company,  on the other hand,  such  Depositary  shall be entitled to act on such
claims, requests or instructions received from the Company.

                             DESCRIPTION OF WARRANTS

     The Company may issue, together with any other series of Offered Securities
or  separately,  Warrants  entitling  the holder to purchase from or sell to the
Company,  or to receive from the Company the cash value of the right to purchase
or sell, Debt Securities,  Preferred Shares, Depositary Shares or Common Shares.
The  Warrants  are to be  issued  under  Warrant  Agreements  (each  a  "Warrant
Agreement")  to be entered  into  between the  Company and a warrant  agent (the
"Warrant  Agent"),  all as set  forth in the  applicable  Prospectus  Supplement
relating to the particular issue of Warrants.

     In  the  case  of  each  series  of  Warrants,  the  applicable  Prospectus
Supplement  will  describe  the terms of the  Warrants  being  offered  thereby,
including  the  following,  if  applicable:  (i) the  offering  price;  (ii) the
currencies  in which  such  Warrants  are being  offered;  (iii)  the  number of
Warrants offered; (iv) the securities underlying the Warrants;  (v) the exercise
price,  the  procedures for exercise of the Warrants and the  circumstances,  if
any,  that will cause the Warrants to be deemed to be  automatically  exercised;
(vi) the date on which the right shall  expire;  (vii) U.S.  federal  income tax
consequences; and (viii) other terms of the Warrants.

     Warrants may be exercised at the appropriate office of the Warrant Agent or
any other office indicated in the applicable Prospectus Supplement. Prior to the
exercise of Warrants entitling the holder to purchase any securities, holders of
such  Warrants  will not have any of the  rights of  holders  of the  securities
purchasable  upon such  exercise  and will not be entitled  to payments  made to
holders of such securities.

     The Warrant  Agreements may be amended or supplemented  without the consent
of the holders of the Warrants issued  thereunder to effect changes that are not
inconsistent  with the  provisions  of the  Warrants  and that do not  adversely
affect the interests of the holders of the Warrants.

               DESCRIPTION OF CONVERTIBLE SUBORDINATED DEBENTURES

     In October 1996 the Company issued $240 million aggregate  principal amount
of  convertible   subordinated   debentures   (the   "Convertible   Subordinated
Debentures"),  consisting  of $70  million  aggregate  principal  amount of 7.5%
Convertible   Subordinated   Debentures  due  2003,  Series  A  (the  "Series  A
Debentures"),  $130  million  aggregate  principal  amount  of 7.5%  Convertible
Subordinated Debentures due 2003, Series B (the "Series B Debentures"),  and $40
million aggregate principal amount of 7.25% Convertible  Subordinated Debentures
due 2001 (the "7.25%

                                       22
<PAGE>

Debentures").  The Series A  Debentures  and the 7.25%  Debentures  were sold in
offerings  registered under the Securities Act, and the Series B Debentures were
sold in an  offering  outside of the United  States  pursuant  to  Regulation  S
promulgated under the Securities Act.

     The Convertible Subordinated Debentures are convertible into Common Shares,
initially at a conversion  price of $18 per Common  Share,  at any time prior to
maturity or earlier  redemption.  Such conversion price is subject to adjustment
in certain events,  including the payment of dividends or  distributions  on the
Company's  Shares in Common  Shares or certain  other  securities  issued by the
Company,  the  issuance  to all holders of Common  Shares of rights,  options or
warrants   entitling   them  to  subscribe  for  Common  Shares  (or  securities
convertible  into Common  Shares),  subdivisions  or  combinations of the Common
Shares into a greater or smaller  number of shares,  reclassification  of Common
Shares  resulting  in an  issuance  of any of the  Company's  Shares and certain
mergers or combination or sales of substantially all assets of the Company.

     As of May 1,  1997  $28.3  million  in  principal  amount  of the  Series A
Debentures had been converted into an aggregate of 1,573,879 Common Shares,  and
none of the 7.25% Debentures or Series B Debentures had been converted.

     The indebtedness  evidenced by the Convertible  Subordinated  Debentures is
subordinated  and  junior in right of  payment,  to the  extent set forth in the
trust indenture applicable thereto, to the prior payment in full of amounts then
due in respect of all indebtedness of the Company for borrowed money and certain
other indebtedness, excluding (i) indebtedness of the Company to a subsidiary or
an officer, director,  trustee or employee of the Company or a subsidiary,  (ii)
indebtedness  of the  Company  which,  pursuant  to the terms of the  instrument
creating or evidencing such  indebtedness,  is expressly made pari passu with or
subordinate in right of payment to the Convertible  Subordinated  Debentures and
(iii) any liability of the Company for taxes.

     The preceding  discussion of certain terms of the Convertible  Subordinated
Debentures is a summary of certain  provisions of the  Convertible  Subordinated
Debentures and the related trust indenture.  Such discussion does not purport to
be complete and is in all respects  subject to and  qualified in its entirety by
reference to the complete terms thereof and of such trust indenture.

                 LIMITATION OF LIABILITY; SHAREHOLDER LIABILITY

     Maryland law permits a REIT to provide, and the Declaration provides,  that
no trustee, officer, shareholder, employee or agent of the Company shall be held
to any personal liability,  jointly or severally, for any obligation of or claim
against the Company, and that, as far as practicable,  each written agreement of
the Company is to contain a  provision  to that  effect.  Despite  these  facts,
counsel  has  advised the Company  that in some  jurisdictions  the  possibility
exists that  shareholders of a  non-corporate  entity such as the Company may be
held  liable for acts or  obligations  of the  Company.  Counsel has advised the
Company  that the  State  of Texas  may not give  effect  to the  limitation  of
shareholder  liability afforded by Maryland law, but that Texas law would likely
recognize  contractual  limitations of liability such as those discussed  above.
The  Company  intends to conduct its  business in a manner  designed to minimize
potential  shareholder  liability by, among other things,  inserting appropriate
provisions in written  agreements of the Company;  however,  no assurance can be
given  that   shareholders   can  avoid   liability  in  all  instances  in  all
jurisdictions.

     The  Declaration  provides that,  upon payment by a shareholder of any such
liability,  the shareholder will be entitled to  indemnification by the Company.
There can be no assurance  that, at the time any such  liability  arises,  there
will  be  assets  of  the   Company   sufficient   to  satisfy   the   Company's
indemnification obligation. The Trustees intend to conduct the operations of the
Company,  with the advice of counsel,  in such a way as to minimize or avoid, as
far as practicable,  the ultimate  liability of the shareholders of the Company.
The  Trustees  do not intend to  provide  insurance  covering  such risks to the
shareholders.

                                       23
<PAGE>

        REDEMPTION; BUSINESS COMBINATIONS AND CONTROL SHARE ACQUISITIONS

Redemption and Business Combinations

     For the Company to qualify as a REIT under the Code,  in any taxable  year,
not more than 50% in value of its outstanding  Shares may be owned,  directly or
indirectly by five or fewer individuals during the last six months of such year,
and the shares must be owned by 100 or more persons  during at least 335 days of
a taxable year or a proportionate part of a taxable year less than 12 months. In
order to meet  these  and other  requirements,  the  Trustees  have the power to
redeem or prohibit the transfer of a sufficient  number of Shares to maintain or
bring the ownership of the Shares into  conformity  with such  requirements.  In
connection  with the foregoing,  if the Trustees  shall, at any time and in good
faith,  be  of  the  opinion  that  direct  or  indirect   ownership  of  shares
representing  more  than  8.5% in value of the  total  Shares  outstanding  (the
"Excess  Shares") has or may become  concentrated in the hands of one beneficial
owner,  other than Excepted  Persons,  the Trustees  shall have the power (i) to
purchase from any  shareholder  of the Company such Excess  Shares,  and (ii) to
refuse to  transfer  or issue  Shares to any person  whose  acquisition  of such
Shares would,  in the opinion of the Trustees,  result in the direct or indirect
beneficial  ownership  by any  person of Shares  representing  more than 8.5% in
value of the  outstanding  Shares.  Any  transfer of Shares,  options,  or other
securities  convertible  into Shares that would create a beneficial owner (other
than any of the Excepted Persons) of Shares representing more than 8.5% in value
of the total Shares outstanding shall be deemed void ab initio, and the intended
transferee  shall be deemed never to have had an interest  therein.  Further the
Declaration  provides  that  transfers  or  purported  acquisitions,   directly,
indirectly or by attribution,  of Shares, or securities convertible into Shares,
that could result in disqualification of the Company as a REIT are null and void
and permits the Trustees to repurchase  Shares or other securities to the extent
necessary to maintain the Company's status as a REIT. The purchase price for any
Shares  so  purchased  shall be  determined  by the  price of the  Shares on the
principal  exchange  on  which  they  are then  traded,  or if no such  price is
available, then the purchase price shall be equal to the net asset value of such
Shares as determined by the Trustees in accordance with applicable law. From and
after the date fixed for purchase by the Trustees, and so long as payment of the
purchase  price for the  Shares to be so  redeemed  shall have been made or duly
provided for, the holder of any Excess Shares so called for purchase shall cease
to be entitled to  distributions,  voting rights and any and all other  benefits
with respect to such Shares,  except the right to payment of the purchase  price
for the Shares.

     The  Declaration  also  requires  that  Business  Combinations  between the
Company  and a  beneficial  holder of 10% or more of the  outstanding  Shares (a
"Related Person") be approved by the affirmative vote of the holders of at least
75% of the Shares unless (1) the Trustees by unanimous  vote or written  consent
shall have  expressly  approved in advance the  acquisition  of the  outstanding
Shares that caused the Related  Person to become a Related  Person or shall have
approved the Business  Combination  prior to the Related Person  involved in the
Business  Combination  having  become  a  Related  Person;  or (2) the  Business
Combination  is solely  between the Company  and a 100% owned  affiliate  of the
Company.  As  permitted  by law,  the Company has elected to be governed by such
provisions  rather  than  the  provisions  of  Subtitle  6 of  Title  3  of  the
Corporations  and  Associations  Article  of  the  Annotated  Code  of  Maryland
regarding business combinations.

     Under the Declaration the number of trustees may be fixed from time to time
by  two-thirds  of the  Trustees or by an amendment  of the  Declaration  by the
shareholders  of the  Company,  with a  minimum  of three  and a  maximum  of 12
trustees, a majority of whom must be Independent Trustees. The Declaration fixes
the current  number of trustees of the Company at five and divides the  Trustees
into three groups.  Trustees in each group are elected to three-year  terms.  As
the  Trustees'  terms  expire,  replacements  are  elected by a majority  of the
outstanding  Shares.  The  classified  nature of the  Trustees  may make it more
difficult for the  shareholders  to remove the management of the Company than if
all  trustees  were  elected on an annual  basis.  Vacancies  may be filled by a
majority of the remaining trustees,  except that a vacancy among the Independent
Trustees must be filled by a majority of the remaining  Independent  Trustees or
by majority vote of the Company's  shareholders.  Any trustee may be removed for
cause by all the remaining  trustees,  or without cause by vote of two-thirds of
the Shares then outstanding and entitled to vote thereon.

                                       24
<PAGE>

     The provisions regarding business combinations and the classified nature of
the Trustees and certain  other  matters may not be repealed or amended  without
the affirmative  vote of at least 75% of the of the shareholders of the Company,
provided that the Trustees,  by two-thirds  vote,  may,  without the approval or
consent  of the  shareholders,  adopt  any  amendment  that  they in good  faith
determine  to be  necessary to permit the Company to qualify as a REIT under the
Code.

     The foregoing  provisions  may have the effect of  discouraging  unilateral
tender offers or other takeover proposals which certain  shareholders might deem
in their interests or pursuant to which they might receive a substantial premium
for their  Shares.  The  provisions  could  also have the  effect of  insulating
current  management  against the  possibility of removal and could,  by possibly
reducing  temporary  fluctuations  in market  price caused by  accumulations  of
Shares,  deprive  shareholders of opportunities to sell at a temporarily  higher
market  price.  However,  the Trustees  believe  that  inclusion of the business
combination  provisions  in the  Declaration  may help assure fair  treatment of
shareholders and preserve the assets of the Company.

Control Share Acquisition

     Maryland law provides for a limitation of voting rights in a "control share
acquisition."  The Maryland  statute defines a control share  acquisition at the
20%,  33 1/3%  and 50%  acquisition  levels,  and  requires  a  two-thirds  vote
(excluding  shares  owned  by  the  acquiring  person  and  certain  members  of
management)  to  accord  voting  rights to shares  acquired  in a control  share
acquisition.  The statute  would  require  the target  company to hold a special
meeting at the request of an actual or proposed  control share acquiror  subject
to compliance with certain conditions by such acquiror. In addition,  unless the
charter,  declaration of trust or by-laws provide  otherwise,  the statute gives
the company, within certain time limitations, various redemption rights if there
is a  shareholder  vote on the  issue  and the  grant of  voting  rights  is not
approved,  or if an "acquiring  person statement" is not delivered to the target
company within 10 days following a control share acquisition.  Moreover,  unless
the charter,  declaration  of trust or by-laws  provide  otherwise,  the statute
provides that if, before a control share acquisition  occurs,  voting rights for
control shares are approved at a shareholders'  meeting and the acquiror becomes
entitled  to vote a majority  of the  shares  entitled  to vote,  then all other
shareholders may exercise appraisal rights. The statute does not apply to shares
acquired in a merger,  consolidation or share exchange if the company is a party
to the  transaction.  An  acquisition of shares may be exempted from the control
share statute provided that a charter,  declaration of trust or by-law provision
is adopted for such purpose prior to the control share acquisition. There are no
such provisions in the Declaration or By-laws of the Company.

Rights Plan

     In October 1994 the Trustees adopted a shareholder rights plan (the "Rights
Plan") under which one Junior  Participating  Preferred  Share purchase right (a
"Right")  was  distributed  for each Common Share then  outstanding.  Each Right
entitles  the holder to buy 1/100th of a Junior  Participating  Preferred  Share
(or, in certain circumstances, to receive cash, property, Common Shares or other
securities  of the Company) at an exercise  price of $50 per 1/100th of a Junior
Participating  Preferred  Share.  Certain  powers,  preferences  and  rights and
certain qualifications, limitations and restrictions of the Junior Participating
Preferred Shares are summarized above under  "Description of Preferred Shares --
Junior Participating Preferred Shares."

     Initially,  the Rights  are  attached  to  certificates  representing  then
outstanding  Common Shares. The Rights will separate from such Common Shares and
a  "Distribution  Date" will occur upon the earlier of (1) 10 business  days (or
such later date as the Trustees may determine before a Distribution Date occurs)
following  a  public  announcement  by the  Company  that a  person  or group of
affiliated  or  associated  persons,  with  certain  exceptions  (an  "Acquiring
Person"),  has  acquired,  or has  obtained  the  right to  acquire,  beneficial
ownership  of 10% or more of the  outstanding  Common  Shares  (the date of such
announcement being a "Share Acquisition Date") or (ii) 10 business days (or such
later date as the  Trustees may  determine  before a  Distribution  Date occurs)
following the commencement of a tender offer or exchange offer that would result
in a person becoming an Acquiring Person.

                                       25
<PAGE>

     Until the  Distribution  Date,  (i) the  Rights  will be  evidenced  by the
certificates  for Common Shares and will be transferred  with and only with such
Common  Share  certificates,  (ii)  Common  Share  certificates  will  contain a
notation  incorporating  the rights agreement  pursuant to which the Rights were
issued  (the  "Rights  Agreement")  by  reference  and (iii) the  surrender  for
transfer of any certificates for Common Shares  outstanding will also constitute
the transfer of the Rights associated with the Common Shares represented by such
certificates.

     The Rights are not exercisable  until the Distribution Date and will expire
at the close of  business  on October  17,  2004,  unless  earlier  redeemed  or
exchanged by the Company as described  below.  Until a Right is  exercised,  the
holder  thereof,  as  such,  has no  rights  as a  shareholder  of the  Company,
including, without limitation, the right to vote or to receive dividends.

     In the event (a  "Flip-In  Event") a Person  becomes  an  Acquiring  Person
(except pursuant to a tender or exchange offer for all outstanding Common Shares
at a price and on terms which a majority of the Company's  Outside  Trustees (as
defined in the Rights  Agreement)  determines to be fair to and otherwise in the
best  interests  of the Company and its  shareholders  (a "fair  offer")),  each
holder of a Right will  thereafter  have the right to receive,  upon exercise of
such Right, Common Shares (or, in certain circumstances, cash, property or other
securities  of the  Company)  having a Current  Market  Price (as defined in the
Rights  Agreement)  equal  to  two  times  the  exercise  price  of  the  Right.
Notwithstanding  the  foregoing,  following the occurrence of any Flip-In Event,
all Rights that are, or (under  certain  circumstances  specified  in the Rights
Agreement)  were,  beneficially  owned by any  Acquiring  Person  (or by certain
related  parties)  will be null and void in the  circumstances  set forth in the
Rights  Agreement.  However,  Rights  will  not  be  exercisable  following  the
occurrence  of any  Flip-In  Event  until  such time as the Rights are no longer
redeemable by the Company as set forth below.

     In the event (a "Flip-Over  Event") that, at any time on or after the Share
Acquisition  Date, (i) the Company shall take part in a merger or other business
combination  transaction  (other than certain  mergers that follow a fair offer)
and the Company shall not be the surviving entity or (ii) the Company shall take
part in a merger or other business  combination  transaction in which the Common
Shares are changed or exchanged  (other than certain  mergers that follow a fair
offer) or (iii) 50% or more of the Company's  assets or earning power is sold or
transferred,  each holder of a Right (except Rights which  previously  have been
voided,  as set forth above) shall  thereafter  have the right to receive,  upon
exercise,  a number of shares of common stock of the acquiring  company having a
Current Market Price equal to two times the exercise price of the Right. Flip-In
Events and Flip-Over Events are collectively referred to as "Triggering Events."

     The Purchase Price payable and the number of Junior Participating Preferred
Shares (or the  amount of cash,  property  or other  securities)  issuable  upon
exercise  of the Rights are subject to  adjustment  from time to time to prevent
dilution (i) in the event of a share dividend on, or a subdivision,  combination
or  reclassification  of, the Junior  Participating  Preferred  Shares,  (ii) if
holders of the Junior Participating  Preferred Shares are granted certain rights
or  warrants  to  subscribe  for  Junior   Participating   Preferred  Shares  or
convertible  securities  at less than the  Current  Market  Price of the  Junior
Participating  Preferred Shares or (iii) upon the distribution to holders of the
Junior  Participating  Preferred  Shares of evidences of  indebtedness or assets
(excluding  regular  quarterly  cash  dividends)  or of  subscription  rights or
warrants  (other than those  referred to above).  With  certain  exceptions,  no
adjustment in the Purchase Price will be required until  cumulative  adjustments
amount to at least 1% of the  Purchase  Price.  The  Company is not  required to
issue fractional  Shares upon the exercise of any Right, and in lieu thereof,  a
cash payment will be made.

     At any time until 10 business days  following the Share  Acquisition  Date,
the Company may redeem the Rights in whole,  but not in part, at a price of $.01
per Right,  payable,  at the option of the Company,  in cash,  Common  Shares or
other  consideration  as  the  Trustees  may  determine.  Immediately  upon  the
effectiveness of the action of the Trustees  ordering  redemption of the Rights,
the Rights will terminate and the only right of the holders of Rights will be to
receive the $.01 per Right redemption price.

                                       26
<PAGE>

     The term of the  Rights,  other  than key  financial  terms and the date on
which  the  Rights  expire,  may  be  amended  by  the  Trustees  prior  to  the
Distribution  Date.  Thereafter,  the provisions of the Rights  Agreement may be
amended  by the  Trustees  only  in  order  to cure  any  ambiguity,  defect  or
inconsistency,  to make changes which do not  adversely  affect the interests of
holders of Rights  (excluding the interests of any Acquiring  Person and certain
other  related  parties)  or to shorten or lengthen  any time  period  under the
Rights  Agreement;  provided,  however,  that no  amendment to lengthen the time
period  governing  redemption is permitted to be made at such time as the Rights
are not redeemable.

                              PLAN OF DISTRIBUTION

     The Company may sell the Offered Securities to one or more underwriters for
public offering and sale by them or may sell the Offered Securities to investors
directly or through agents.  Any such underwriter or agent involved in the offer
and sale of the Offered  Securities  will be named in the applicable  Prospectus
Supplement.

     The distribution of Offered Securities may be effected from time to time in
one or more  transactions at a fixed price or prices,  which may be changed,  at
market prices  prevailing at the time of sale, at prices  related to such market
prices  or at  negotiated  prices.  In  connection  with  the  sale  of  Offered
Securities,  underwriters  or agents may  receive or be deemed to have  received
compensation  from the Company or from  purchasers  in the form of  underwriting
discounts, concessions or commissions.  Underwriters may sell Offered Securities
to or through dealers,  and such dealers may receive compensation in the form of
discounts, concessions or commissions from the underwriters or from purchasers.

     Any underwriting compensation paid by the Company to underwriters or agents
in  connection  with the  offering  of Offered  Securities,  and any  discounts,
concessions or commissions  allowed by  underwriters to  participating  dealers,
will be set forth in the applicable Prospectus Supplement. Underwriters, dealers
and agents  participating in the  distribution of the Offered  Securities may be
deemed  to be  underwriters,  and any  discounts,  concessions  and  commissions
received  by them and any  profit  realized  by them on  resale  of the  Offered
Securities may be deemed to be underwriting discounts and commissions, under the
Securities  Act.  Underwriters,  dealers  and  agents  may  be  entitled,  under
agreements  entered  into  with the  Company,  to  indemnification  against  and
contribution toward certain civil liabilities,  including  liabilities under the
Securities Act.

     If so indicated in the applicable Prospectus  Supplement,  the Company will
authorize  underwriters  or other  persons  acting  as the  Company's  agents to
solicit offers by certain  institutions to purchase Offered  Securities from the
Company at the public  offering  price set forth in such  Prospectus  Supplement
pursuant to  contracts  providing  for payment and  delivery on a future date or
dates.  Institutions  with whom such  contracts,  when  authorized,  may be made
include  commercial  and savings  banks,  insurance  companies,  pension  funds,
investment  companies,   educational  and  charitable  institutions,  and  other
institutions,  but will in all cases be subject to the  approval of the Company.
Any such  contracts  will be subject to the  condition  that the  purchase by an
institution of the Offered  Securities covered by its contracts shall not at the
time of delivery be prohibited  under the law of any  jurisdiction in the United
States to which such  institution  is subject  and,  if a portion of the Offered
Securities is being sold to  underwriters,  may be subject to the condition that
the Company shall have sold to such underwriters the Offered Securities not sold
for delayed delivery.  The underwriters and such other persons will not have any
responsibility in respect of the validity or performance of such contracts.

     Unless  otherwise  specified  in the related  Prospectus  Supplement,  each
series of Offered  Securities  will be a new issue with no  established  trading
market,  other  than  Common  Shares  which  are  listed  on the New York  Stock
Exchange.  Any Common  Shares sold pursuant to a Prospectus  Supplement  will be
listed on such  Exchange.  The  Company  may  elect to list any other  series of
Offered  Securities  on  an  exchange,  but  is  not  obligated  to do  so.  Any
underwriters  to whom  Offered  Securities  are sold by the  Company  for public
offering  and  sale  may  make a market  in such  Offered  Securities,  but such
underwriters  will not be  obligated  to do so and may  discontinue  any  market
making at any time without notice. No assurance can be given as to the liquidity
of or the trading markets for any Offered Securities.

                                       27
<PAGE>

     Certain of the  underwriters  and their  affiliates  may be  customers  of,
engage  in  transactions  with and  perform  services  for the  Company  and its
subsidiaries in the ordinary course of business.

     The specific terms and manner of sale of the Offered Securities will be set
forth or summarized in the applicable Prospectus Supplement.

                                  LEGAL MATTERS

     Certain legal matters with respect to the Offered Securities offered by the
Company will be passed upon for the Company by Sullivan & Worcester LLP, Boston,
Massachusetts.  Sullivan  &  Worcester  LLP,  will  rely,  as to all  matters of
Maryland law, upon one or more  opinions of Piper & Marbury  L.L.P.,  Baltimore,
Maryland.  Barry  M.  Portnoy,  a  retired  partner  of the firm of  Sullivan  &
Worcester LLP, is a Managing  Trustee of the Company and HPT, a director and 50%
shareholder of the HRPT Advisors, Inc., the advisor to the Company ("Advisors"),
and a director and/or significant  shareholder of certain lessees and mortgagors
of the Company.  Sullivan & Worcester LLP represents  Advisors,  HPT, certain of
such lessees and mortgagors  and certain  affiliates of each of the foregoing on
various matters.

                                     EXPERTS

     The consolidated  financial  statements of the Company  incorporated in the
Company's  Annual Report on Form 10-K for the year ended  December 31, 1996 have
been  audited by Ernst & Young LLP,  independent  auditors as set forth in their
report thereon  incorporated  by reference  therein and  incorporated  herein by
reference  which,  as to the year 1996, is based in part on the report of Arthur
Andersen LLP,  independent  public  accountants.  Such financial  statements are
incorporated  herein by reference in reliance  upon such reports  given upon the
authority of such firms as experts in accounting and auditing.

     The  consolidated  financial  statements  of Marriott  International,  Inc.
incorporated by reference in this  Prospectus and elsewhere in the  registration
statement  to the extent and for the periods  indicated in their  reports,  have
been audited by Arthur Andersen LLP,  independent  public  accountants,  and are
included herein in reliance upon the authority of said firm as experts in giving
said reports.

                                -----------------


THE AMENDED AND  RESTATED  DECLARATION  OF TRUST OF THE  COMPANY,  DATED JULY 1,
1994, A COPY OF WHICH, TOGETHER WITH ALL AMENDMENTS THERETO (THE "DECLARATION"),
IS DULY FILED IN THE OFFICE OF THE DEPARTMENT OF ASSESSMENTS AND TAXATION OF THE
STATE OF  MARYLAND,  PROVIDES  THAT THE NAME "HEALTH AND  RETIREMENT  PROPERTIES
TRUST" REFERS TO THE TRUSTEES UNDER THE  DECLARATION  COLLECTIVELY  AS TRUSTEES,
BUT NOT INDIVIDUALLY OR PERSONALLY,  AND THAT NO TRUSTEE, OFFICER,  SHAREHOLDER,
EMPLOYEE  OR  AGENT OF THE  COMPANY  SHALL  BE HELD TO ANY  PERSONAL  LIABILITY,
JOINTLY OR SEVERALLY,  FOR ANY OBLIGATION OF, OR CLAIM AGAINST, THE COMPANY. ALL
PERSONS  DEALING WITH THE COMPANY,  IN ANY WAY, SHALL LOOK ONLY TO THE ASSETS OF
THE COMPANY FOR THE PAYMENT OF ANY SUM OR THE PERFORMANCE OF ANY OBLIGATION.

                                       28
<PAGE>

                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution

     Set forth below is an estimate (except in the case of the registration fee)
of the  amount  of fees and  expenses  to be  incurred  in  connection  with the
issuance and distribution of the Offered  Securities  registered  hereby,  other
than underwriting discounts and commissions.


Registration Fee Under Securities Act                       $ 263,666
Blue Sky Fees and Expenses                                     10,000
Legal Fees and Expenses                                       700,000
Accounting Fees and Expenses                                  300,000
Printing and Engraving                                        200,000
Rating Agencies Fees                                           75,000
Trustee Fees (including counsel fees)                          35,000
Miscellaneous Fees and Expenses                               166,334
                                                           ----------
   Total:                                                  $1,750,000


Item 15. Indemnification of Directors and Officers

     Section 7.4 of the  Company's  Amended and Restated  Declaration  of Trust,
filed as an Exhibit to the Company's  Current  Report on Form 8-K dated July 10,
1996,  which  provides  for  indemnification  of  Trustees  and  officers of the
Company, is hereby incorporated by reference.

     Reference is made to the Underwriting  Agreements (Exhibits 1.1 through 1.5
hereto)  which  may  contain  certain  provisions  for  indemnification  by  the
Underwriters of the Company,  Trustees,  officers and controlling  persons under
certain circumstances.

Item 16. Exhibits

1.1   -  Form of Underwriting Agreement (for Debt Securities)*
1.2   -  Form of Underwriting Agreement (for Preferred Shares)*
1.3   -  Form of Underwriting Agreement (for Depositary Shares)*
1.4   -  Form of Underwriting Agreement (for Common Shares)*
1.5   -  Form of Underwriting Agreement (for Warrants)*
3.1   -  Amended and Restated Declaration of Trust as amended by the amendment
         approved by the shareholders  June 28, 1996 and filed with the Maryland
         Department of Assessments and Taxation on July 9, 1996 (Incorporated by
         reference to the Company's  Current  Report on Form 8-K, dated July 10,
         1996)
3.2   -  Amendment, effective March 3, 1997, to Health and Retirement Properties
         Trust's Amended and Restated Declaration of Trust providing for an 
         increase in the authorized common shares of beneficial interest,  $.01 
         par value per share, from 100,000,000 to 125,000,000. (Incorporated by
         reference to the Company's Current Report on Form 8-K, dated March 3, 
         1997)
3.3   -  Amended and Restated Bylaws (Incorporated by reference to the Company's
         Annual Report on Form 10-K for the year ended December 31, 1995)
4.1   -  Form of Senior Indenture
4.2   -  Form of Subordinated Indenture
4.3   -  Form of Senior Debt Security*
4.4   -  Form of Subordinated Debt Security*
4.5   -  Form of Articles Supplementary for the Preferred Shares*
4.6   -  Form of Deposit Agreement, including form of Depositary Receipt for 
         Depositary Shares*

                                      II-1

<PAGE>

4.7   -  Form of Preferred Shares Certificate*
4.8   -  Form of Debt Warrant Agreement, including form of Debt Warrant *
4.9   -  Form of Preferred Share Warrant Agreement, including form of Preferred
         Share Warrant* 
4.10  -  Form of Common Share Warrant Agreement,  including form of Common 
         Share Warrant* 
4.11  -  Rights Agreement dated October 17, 1994 between the Company and State 
         Street Bank and Trust Company, as Rights Agent (including the form of 
         Articles Supplementary relating to the Junior Participating Preferred
         Shares annexed as an exhibit thereto) (Incorporated by reference to the
         Company's Registration Statement on Form 8-A dated October 24, 1994)
4.12  -  Indenture  dated  September  20,  1996  between  the  Company and Fleet
         National Bank ("Fleet"),  as trustee  (Incorporated by reference to the
         form of Indenture  filed as Exhibit 4.1 to the  Company's  Registration
         Statement  on Form S-3,  No.  333-02863,  as modified by the  Company's
         Registration Statement on Form 8-A dated October 1, 1996)
4.13  -  First Supplemental Indenture between the Company and Fleet, as trustee,
         relating to the Company's 7.5% Senior Subordinated Debentures due 2003,
         Series A (including  form of debenture)  (Incorporated  by reference to
         the Company's Current Report on Form 8-K dated October 7, 1996)
4.14  -  Second  Supplemental  Indenture  between  the  Company  and  Fleet,  as
         trustee,  relating to the Company's 7.5% Senior Subordinated Debentures
         due 2003,  Series B  (including  form of  debenture)  (Incorporated  by
         reference to the Company's  Current Report on Form 8-K dated October 7,
         1996)
4.15  -  Third Supplemental Indenture between the Company and Fleet, as trustee,
         relating to the Company's 7.25% Senior Subordinated Debentures due 2001
         (including  form  of  debenture)  (Incorporated  by  reference  to  the
         Company's Current Report on Form 8-K dated October 7, 1996)
5.1   -  Opinion  of  Sullivan  &  Worcester  LLP 
5.2   -  Opinion  of Piper & Marbury L.L.P.
8     -  Opinion of Sullivan & Worcester LLP re: tax matters *
12    -  Statement Regarding Computation of Ratios of Earnings to Fixed Charges
23.1  -  Consent of Ernst & Young LLP
23.2  -  Consents of Arthur Andersen LLP
23.3  -  Consent of  Sullivan & Worcester  LLP  (included  in Exhibit  5.1) 
23.4  -  Consent  of Piper & Marbury  L.L.P.  (included  in  Exhibit  5.2) 
24    -  Powers of Attorney  (included at Page II-4) 
25.1  -  Statement of  Eligibility of Trustee on Form T-1*
- -------------
*    To be filed by amendment or  incorporated  by reference in connection  with
     the offering of Offered Securities, as appropriate.

Item 17. Undertakings

(a)  The undersigned Registrant hereby undertakes:

     (1) To file,  during any period in which  offers or sales are being made, a
     post-effective amendment to this registration statement:

          (i)  To include any  prospectus  required  by section  10(a)(3) of the
               Securities Act of 1933;

          (ii) To reflect in the  prospectus  any facts or events  arising after
               the  effective  date of the  registration  statement (or the most
               recent post-effective  amendment thereof) which,  individually or
               in  the  aggregate,   represent  a  fundamental   change  in  the
               information   set   forth   in   this   registration   statement.
               Notwithstanding the foregoing, any increase or decrease in volume
               of  securities  offered (if the total dollar value of  securities
               offered  would not  exceed  that  which was  registered)  and any
               deviation  from  the low or  high  end of the  estimated  maximum
               offering  range may be reflected in the form of prospectus  filed
               with the Commission  pursuant to Rule 424(b) (Section  230.424(b)
               of 17 C.F.R.)  if, in the  aggregate,  the  changes in volume and
               price  represent  no  more  than  a 20%  change  in  the  maximum
               aggregate  offering  price  set  forth  in  the  "Calculation  of
               Registration Fee" table in the effective registration  statement;
               and

                                      II-2

<PAGE>



          (iii)To include any material  information  with respect to the plan of
               distribution  not  previously   disclosed  in  this  registration
               statement  or any  material  change to such  information  in this
               registration statement;

         provided,  however, that subparagraphs (i) and (ii) do not apply if the
         information  required to be included in a  post-effective  amendment by
         those  paragraphs  is contained in the  periodic  reports  filed by the
         Registrant  pursuant to Section 13 or Section  15(d) of the  Securities
         and  Exchange  Act of 1934 that are  incorporated  by reference in this
         registration statement.

         (2) That  for the  purpose  of  determining  any  liability  under  the
         Securities Act of 1933,  each such  post-effective  amendment  shall be
         deemed to be a new  registration  statement  relating to the Securities
         offered herein,  and the offering of such Securities at that time shall
         be deemed to be the initial bona fide offering thereof.

         (3) To remove from registration by means of a post-effective  amendment
         any of the  Securities  being  registered  which  remain  unsold at the
         termination of the offering.

(b)      The  undersigned  Registrant  hereby further  undertakes  that, for the
         purposes of determining any liability under the Securities Act of 1933,
         each filing of the Registrant's annual report pursuant to Section 13(a)
         or  Section  15(d)  of  the   Securities   Exchange  of  1934  that  is
         incorporated  by  reference  in this  registration  statement  shall be
         deemed to be a new  registration  statement  relating to the Securities
         offered herein,  and the offering of such Securities at that time shall
         be deemed to be the initial bona fide offering thereof.

(c)      Insofar as indemnification for liabilities arising under the Securities
         Act of 1933 may be  permitted to  trustees,  officers  and  controlling
         persons of the Registrant  pursuant to the provisions  described  under
         Item  15 of this  registration  statement,  or  otherwise  (other  than
         insurance),  the Registrant has been advised that in the opinion of the
         Securities  and Exchange  Commission  such  indemnification  is against
         public   policy   as   expressed   in  such  Act  and  is,   therefore,
         unenforceable.  In the event that a claim for  indemnification  against
         such liabilities  (other than the payment by the Registrant of expenses
         incurred  or paid by a trustee,  officer or  controlling  person of the
         Registrant in the successful defense of any action, suit or proceeding)
         is  asserted  by  such  trustee,   officer  or  controlling  person  in
         connection with the Securities being  registered,  the Registrant will,
         unless in the  opinion of its  counsel  the matter has been  settled by
         controlling  precedent,  submit to a court of appropriate  jurisdiction
         the  question  whether  such  indemnification  by it is against  public
         policy  as  expressed  in such Act and will be  governed  by the  final
         adjudication of such issue.

(d)      The undersigned registrant hereby undertakes that:

         (1) For purposes of determining  any liability under the Securities Act
         of 1933, the information  omitted from the form of prospectus  filed as
         part of this  Registration  Statement  in  reliance  upon Rule 430A and
         contained in a form of prospectus filed by the Company pursuant to Rule
         424(b)(1) or (4) or 497(h) under the  Securities Act shall be deemed to
         be part of this  Registration  Statement as of the time it was declared
         effective; and

         (2) For purposes of determining  any liability under the Securities Act
         of  1933,  each  post-effective  amendment  that  contains  a  form  of
         prospectus shall be deemed to be a new registration  statement relating
         to the securities offered therein,  and the offering of such securities
         at that  time  shall be  deemed to be the  initial  bona fide  offering
         thereof.

(e)      The undersigned registrant hereby undertakes to file an application for
         the purpose of determining the eligibility of each Indenture Trustee to
         act under  subsection (a) of Section 310 of the Trust  Indenture Act in
         accordance with the rules and regulations  prescribed by the Commission
         under Section 305(b)(2) of the Trust Indenture Act.


                                      II-3

<PAGE>


                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, as amended,
the Registrant has duly caused this  registration  statement to be signed on its
behalf by the  undersigned,  thereunto duly  authorized,  in the City of Newton,
Commonwealth of Massachusetts, on May 12, 1997.

                                     HEALTH AND RETIREMENT PROPERTIES TRUST

                                     By:/s/David J. Hegarty
                                          David J. Hegarty
                                          President and Chief Operating Officer

         Pursuant to the requirements of the Securities Act of 1933, as amended,
this Registration  Statement on Form S-3 relating to Debt Securities,  Preferred
Shares,  Depositary Shares,  Common Shares and Warrants has been signed below on
May  12,  1997 by the  following  persons  in the  capacities  and on the  dates
indicated;  and each of the  undersigned  officers  and  trustees  of Health and
Retirement  Properties Trust,  hereby severally  constitute and appoint David J.
Hegarty,  Ajay  Saini,  Gerard M.  Martin,  Barry M.  Portnoy and  Alexander  A.
Notopoulos,  Jr.,  and  each of them,  to sign  for him,  and in his name in the
capacity  indicated  below,  this  Registration  Statement  for the  purpose  of
registering  such securities  under the Securities Act of 1933, as amended,  and
any and all amendments  thereto,  and any other Registration  Statement filed by
Health and Retirement  Properties  Trust pursuant to Rule 462(b) which registers
additional amounts of such securities for the offering or offerings contemplated
by this  Registration  Statement  (a  "462(b)  Registration  Statement")  hereby
ratifying and  confirming  our signatures as they may be signed by our attorneys
to this Registration  Statement,  any 462(b) Registration  Statement and any and
all amendments to either thereof.
<TABLE>
<CAPTION>

          Signature                                    Title                                      Date
<S>                                     <C>                                                   <C>

/s/David J. Hegarty                      President and Chief Operating                          May 12, 1997
David J. Hegarty                         Officer (principal executive officer)

/s/Ajay Saini                            Treasurer and Chief Financial                          May 12, 1997
Ajay Saini                               Officer

/s/ Bruce M. Gans, M.D.                  Trustee                                                May 12, 1997
Bruce M. Gans, M.D.

/s/Rev. Justinian Manning, C.P.          Trustee                                                May 12, 1997
Rev. Justinian Manning, C.P.

/s/Gerard M. Martin                      Managing Trustee                                       May 12, 1997
Gerard M. Martin

/s/ Barry M. Portnoy                     Managing Trustee                                       May 12, 1997
Barry M. Portnoy

/s/ Ralph J. Watts                       Trustee                                                May 12, 1997
Ralph J. Watts

</TABLE>

                                      II-4

                                                                  Exhibit 4.1



















                     HEALTH AND RETIREMENT PROPERTIES TRUST

                                       TO

                            ------------------------

                                     Trustee




                                    Indenture

                          Dated as of __________, 199_



                             Senior Debt Securities




<PAGE>





                               TABLE OF CONTENTS1

                                                                         PAGE

PARTIES.....................................................................1

RECITALS....................................................................1


                          ARTICLE ONE

    DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

SECTION 101.  Definitions...................................................1
              "Act"    .....................................................1
              "Additional Amounts"..........................................2
              "Affiliate"...................................................2
              "Authenticating Agent"........................................2
              "Authorized Newspaper"........................................2
              "Bankruptcy Law"..............................................2
              "Bearer Security".............................................2
              "Board"  .....................................................2
              "Board Resolution"............................................2
              "Business Day"................................................2
              "CEDEL"  .....................................................2
              "Commission"..................................................2
              "Common Depositary"...........................................2
              "Company".....................................................2
              "Company Request" and "Company Order".........................3
              "Conversion Event"............................................3
              "Corporate Trust Office"......................................3
              "corporation".................................................3
              "coupon" .....................................................3
              "Custodian"...................................................3
              "Declaration".................................................3
              "Defaulted Interest"..........................................3
              "Dollar" or "$"...............................................3
              "DTC"    .....................................................3
              "ECU"    .....................................................3
              "Euroclear"...................................................3
              "European Communities"........................................3
              "European Monetary System"....................................3
              "Event of Default"............................................3
              "Exchange Date"...............................................3
              "Foreign Currency"............................................3
              "Funds from Operations".......................................3
              "GAAP"   .....................................................4
              "Government Obligations"......................................4
              "Holder" .....................................................4
- --------
1        This Table of Contents shall not, for any purpose, be deemed to be
         part of this Indenture.

                                       -i-

<PAGE>



              "Indenture"...................................................4
              "Indexed Security"............................................4
              "interest"....................................................4
              "Interest Payment Date".......................................4
              "Maturity"....................................................4
              "Officers' Certificate".......................................5
              "Opinion of Counsel"..........................................5
              "Original Issue Discount Security"............................5
              "Outstanding".................................................5
              "Paying Agent"................................................6
              "Person" .....................................................6
              "Place of Payment"............................................6
              "Predecessor Security"........................................6
              "Redemption Date".............................................6
              "Redemption Price"............................................6
              "Registered Security".........................................6
              "Regular Record Date".........................................6
              "Repayment Date"..............................................6
              "Responsible Officer".........................................6
              "Security"....................................................6
              "Security Register" and "Security Registrar"..................7
              "Significant Subsidiary"......................................7
              "Special Record Date".........................................7
              "Stated Maturity".............................................7
              "Subsidiary"..................................................7
              "Trust Indenture Act" or "TIA"................................7
              "Trustee".....................................................7
              "United States"...............................................7
              "United States person"........................................7
              "Yield to Maturity"...........................................7
SECTION 102.  Compliance Certificates and Opinions..........................7
SECTION 103.  Form of Documents Delivered to Trustee........................8
SECTION 104.  Acts of Holders...............................................8
SECTION 105.  Notices, etc., to Trustee and Company.........................9
SECTION 106.  Notice to Holders; Waiver....................................10
SECTION 107.  Effect of Headings and Table of Contents.....................10
SECTION 108.  Successors and Assigns.......................................11
SECTION 109.  Separability Clause..........................................11
SECTION 110.  Benefits of Indenture........................................11
SECTION 111.  Governing Law................................................11
SECTION 112.  Legal Holidays...............................................11
SECTION 113.  No Personal Liability........................................11

                                   ARTICLE TWO

                                SECURITIES FORMS

SECTION 201.  Forms of Securities..........................................11
SECTION 202.  Form of Trustee's Certificate of Authentication..............12
SECTION 203.  Securities Issuable in Global Form...........................12


                                      -ii-

<PAGE>



                                  ARTICLE THREE

                                 THE SECURITIES

SECTION 301.  Amount Unlimited; Issuable in Series.........................13
SECTION 302.  Denominations................................................16
SECTION 303.  Execution, Authentication, Delivery and Dating...............16
SECTION 304.  Temporary Securities.........................................17
SECTION 305.  Registration, Registration of Transfer and Exchange..........19
SECTION 306.  Mutilated, Destroyed, Lost and Stolen Securities.............22
SECTION 307.  Payment of Interest; Interest Rights Preserved...............22
SECTION 308.  Persons Deemed Owners........................................24
SECTION 309.  Cancellation.................................................24
SECTION 310.  Computation of Interest......................................25

                                  ARTICLE FOUR

                           SATISFACTION AND DISCHARGE

SECTION 401.  Satisfaction and Discharge of Indenture......................25
SECTION 402.  Application of Trust Funds...................................26

                                  ARTICLE FIVE

                                    REMEDIES

SECTION 501.  Events of Default............................................26
SECTION 502.  Acceleration of Maturity; Rescission and Annulment...........28
SECTION 503.  Collection of Indebtedness and Suits for Enforcement 
                by Trustee.................................................28
SECTION 504.  Trustee May File Proofs of Claim.............................29
SECTION 505.  Trustee May Enforce Claims Without Possession of 
                Securities or Coupons......................................30
SECTION 506.  Application of Money Collected...............................30
SECTION 507.  Limitation on Suits..........................................30
SECTION 508.  Unconditional Right of Holders to Receive Principal, Premium,
                if any, Interest and Additional Amounts....................31
SECTION 509.  Restoration of Rights and Remedies...........................31
SECTION 510.  Rights and Remedies Cumulative...............................31
SECTION 511.  Delay or Omission Not Waiver.................................31
SECTION 512.  Control by Holders of Securities.............................31
SECTION 513.  Waiver of Past Defaults......................................32
SECTION 514.  Waiver of Usury, Stay or Extension Laws......................32
SECTION 515.  Undertaking for Costs........................................32

                                   ARTICLE SIX

                                   THE TRUSTEE

SECTION 601.  Notice of Defaults...........................................32
SECTION 602.  Certain Rights of Trustee....................................33
SECTION 603.  Not Responsible for Recitals or Issuance of Securities.......34
SECTION 604.  May Hold Securities..........................................34
SECTION 605.  Money Held in Trust..........................................34

                                      -iii-

<PAGE>



SECTION 606.  Compensation and Reimbursement...............................34
SECTION 607.  Corporate Trustee Required; Eligibility; Conflicting 
                Interests..................................................34
SECTION 608.  Resignation and Removal; Appointment of Successor............35
SECTION 609.  Acceptance of Appointment by Successor.......................36
SECTION 610.  Merger, Conversion, Consolidation or Succession to Business..36
SECTION 611.  Appointment of Authentication Agent..........................37

                                  ARTICLE SEVEN

                HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

SECTION 701.  Disclosure of Names and Addresses of Holders.................38
SECTION 702.  Reports by Trustee...........................................38
SECTION 703.  Reports by Company...........................................38
SECTION 704.  Company to Furnish to Trustee Names and Addresses of Holders.39

                                  ARTICLE EIGHT

                CONSOLIDATION, MERGER, SALE, LEASE OR CONVEYANCE

SECTION 801.  Consolidations and Mergers of Company and Sales, Leases 
               and Conveyances Permitted Subject to Certain Conditions.....39
SECTION 802.  Rights and Duties of Successor Corporation...................39
SECTION 803.  Officers' Certificate and Opinion of Counsel.................40

                                  ARTICLE NINE

                             SUPPLEMENTAL INDENTURES

SECTION 901.  Supplemental Indentures Without Consent of Holders...........40
SECTION 902.  Supplemental Indentures with Consent of Holders..............41
SECTION 903.  Execution of Supplemental Indentures.........................42
SECTION 904.  Effect of Supplemental Indentures............................42
SECTION 905.  Conformity with Trust Indenture Act..........................42
SECTION 906.  Reference in Securities to Supplemental Indentures...........42

                                   ARTICLE TEN

                                    COVENANTS

SECTION 1001.  Payment of Principal, Premium, if any, Interest and 
                  Additional Amounts.......................................42
SECTION 1003.  Money for Securities Payments to Be Held in Trust...........43
SECTION 1004.  Existence...................................................44
SECTION 1005.  Provision of Financial Information..........................45
SECTION 1006.  Statement as to Compliance..................................45
SECTION 1007.  Additional Amounts..........................................45
SECTION 1008.  Waiver of Certain Covenants.................................46


                                      -iv-

<PAGE>



                                 ARTICLE ELEVEN

                            REDEMPTION OF SECURITIES

SECTION 1101.  Applicability of Article....................................46
SECTION 1102.  Election to Redeem; Notice to Trustee.......................46
SECTION 1103.  Selection by Trustee of Securities to Be Redeemed...........47
SECTION 1104.  Notice of Redemption........................................47
SECTION 1105.  Deposit of Redemption Price.................................48
SECTION 1106.  Securities Payable on Redemption Date.......................48
SECTION 1107.  Securities Redeemed in Part.................................49

                                 ARTICLE TWELVE

                                  SINKING FUNDS

SECTION 1201.  Applicability of Article....................................49
SECTION 1202.  Satisfaction of Sinking Fund Payments with Securities.......49
SECTION 1203.  Redemption of Securities for Sinking Fund...................50

                                ARTICLE THIRTEEN

                       REPAYMENT AT THE OPTION OF HOLDERS

SECTION 1301.  Applicability of Article....................................50
SECTION 1302.  Repayment of Securities.....................................50
SECTION 1303.  Exercise of Option..........................................50
SECTION 1304.  When Securities Presented for Repayment Become Due 
                and Payable................................................51
SECTION 1305.  Securities Repaid in Part...................................51

                                ARTICLE FOURTEEN

                       DEFEASANCE AND COVENANT DEFEASANCE

SECTION 1401.  Applicability of Article; Company's Option to Effect 
                Defeasance or Covenant Defeasance..........................52
SECTION 1402.  Defeasance and Discharge....................................52
SECTION 1403.  Covenant Defeasance.........................................52
SECTION 1404.  Conditions to Defeasance or Covenant Defeasance.............53
SECTION 1405.  Deposited Money and Government Obligations to Be Held in 
                Trust; Other Miscellaneous Provisions......................54

                                 ARTICLE FIFTEEN

                        MEETINGS OF HOLDERS OF SECURITIES

SECTION 1501.  Purposes for Which Meetings May Be Called...................55
SECTION 1502.  Call, Notice and Place of Meetings..........................55
SECTION 1503.  Persons Entitled to Vote at Meetings........................55
SECTION 1504.  Quorum; Action..............................................55
SECTION 1505.  Determination of Voting Rights; Conduct and Adjournment 
                 of Meetings...............................................56
SECTION 1506.  Counting Votes and Recording Action of Meetings.............57

TESTIMONIUM................................................................
SIGNATURES AND SEALS.......................................................
ACKNOWLEDGMENTS............................................................
EXHIBIT A -- FORMS OF CERTIFICATION


                                      -v-

<PAGE>



                     HEALTH AND RETIREMENT PROPERTIES TRUST

         Reconciliation  and tie between Trust Indenture Act of 1939, as amended
(the "TIA"), and Indenture, dated as of __________, 199_.


               TIA Section                         Indenture Section
Sec. 310(a)(1)..........................                  607
        (a)(2)..........................                  607
        (b).............................               607, 608
Sec. 312(a).............................                  704
Sec. 312(c).............................                  701
Sec. 313(a).............................                  702
       (c)..............................                  702
Sec. 314(a).............................                 1006
       (a)(4)...........................                 1007
       (c)(1)...........................                  102
       (c)(2)...........................                  102
       (e)..............................                  102
Sec. 315(b).............................                  601
Sec. 316(a) (last sentence).............          101 ("Outstanding")
        (a)(1)(A).......................               502, 512
        (a)(1)(B).......................                  513
       (b)..............................                  508
Sec. 317(a)(1)..........................                  503
       (a)(2)...........................                  504
Sec. 318(a).............................                  111
       (c)..............................                  111

- -------------------

NOTE: This  reconciliation and tie shall not, for any purpose, be deemed to be a
part of the Indenture.

         Attention  should also be directed to Section  318(c) of the TIA, which
provides that the provisions of Sections 310 to and including 317 of the TIA are
a part of and  govern  every  qualified  indenture,  whether  or not  physically
contained therein.

                                      -vi-

<PAGE>




         INDENTURE, dated as of ___________, 199_, between HEALTH AND RETIREMENT
PROPERTIES  TRUST, a Maryland real estate investment trust  (hereinafter  called
the  "Company"),  having  its  principal  office at 400 Centre  Street,  Newton,
Massachusetts  02158  and,  _____________________________,   a  ___________,  as
Trustee  hereunder  (hereinafter  called  the  "Trustee"),  having  its  initial
Corporate Trust Office at ____________________________________.

                             RECITALS OF THE COMPANY

                  The Company  deems it necessary to issue from time to time for
lawful   purposes  its  unsecured  debt  securities   (hereinafter   called  the
"Securities") evidencing its unsecured indebtedness, and has duly authorized the
execution  and delivery of this  Indenture to provide for the issuance from time
to time of the Securities, unlimited as to principal amount, to bear interest at
the rates or formulas, to mature at such times and to have such other provisions
as shall be fixed as hereinafter provided.

                  This  Indenture  is  subject  to the  provisions  of the Trust
Indenture Act of 1939, as amended,  that are deemed to be incorporated into this
Indenture by such Act, and shall, to the extent applicable,  be governed by such
provisions.

                  All things  necessary to make this Indenture a valid agreement
of the Company, in accordance with its terms, have been done.

                  NOW, THEREFORE, THIS INDENTURE WITNESSETH:

                  For and in  consideration  of the premises and the purchase of
the Securities by the Holders thereof, it is mutually covenanted and agreed, for
the equal and  proportionate  benefit of all Holders of the  Securities  or of a
series thereof, as follows:

                                   ARTICLE ONE

             DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

                  SECTION 101. Definitions.  For all purposes of this Indenture,
except as otherwise expressly provided or unless the context otherwise requires:

                  (1) the  terms  defined  in this  Article  have  the  meanings
assigned  to  them  in this  Article,  and  include  the  plural  as well as the
singular;

                  (2) all other terms used herein  which are defined in the TIA,
either  directly or by reference  therein,  have the  meanings  assigned to them
therein, and the terms "cash transaction" and "self-liquidating  paper", as used
in TIA Section 311, shall have the meanings assigned to them in the rules of the
Commission adopted under the TIA;

                  (3) all accounting terms not otherwise defined herein have the
meanings assigned to them in accordance with GAAP; and

                  (4) the words  "herein",  "hereof" and  "hereunder"  and other
words of  similar  import  refer  to this  Indenture  as a whole  and not to any
particular Article, Section or other subdivision.

                  Certain terms,  used  principally  in Article  Three,  Article
Five, Article Six and Article Ten, are defined in those Articles.

                  "Act",  when used with respect to any Holder,  has the meaning
specified in Section 104.


                                                        

<PAGE>



                  "Additional  Amounts" means any  additional  amounts which are
required  by a  Security  or  by  or  pursuant  to  a  Board  Resolution,  under
circumstances specified therein, to be paid by the Company in respect of certain
taxes imposed on certain Holders and which are owing to such Holders.

                  "Affiliate"  of any  specified  Person  means any other Person
directly or indirectly  controlling or controlled by or under direct or indirect
common control with such specified Person.  For the purposes of this definition,
"control"  when used with  respect to any  specified  Person  means the power to
direct the  management  and  policies of such  Person,  directly or  indirectly,
whether  through the ownership of voting  securities,  by contract or otherwise;
and the terms  "controlling" and "controlled"  have meanings  correlative to the
foregoing.

                  "Authenticating   Agent"   means  any   authenticating   agent
appointed by the Trustee pursuant to Section 611.

                  "Authorized  Newspaper"  means  a  newspaper,  printed  in the
English  language  or in an official  language  of the  country of  publication,
customarily  published  on  each  Business  Day,  whether  or not  published  on
Saturdays,  Sundays or  holidays,  and of general  circulation  in each place in
connection  with which the term is used or in the  financial  community  of each
such  place.  Whenever  successive  publications  are  required  to be  made  in
Authorized Newspapers, the successive publications may be made in the same or in
different  Authorized   Newspapers  in  the  same  city  meeting  the  foregoing
requirements and in each case on any Business Day.

                  "Bankruptcy Law" has the meaning specified in Section 501.

                  "Bearer Security" means any Security  established  pursuant to
Section 201 which is payable to
bearer.

                  "Board"  means the board of  trustees  of the  Company  or any
committee of that board duly authorized to act hereunder.

                  "Board  Resolution" means a copy of a resolution  certified by
the Secretary or an Assistant Secretary of the Company to have been duly adopted
by  the  Board  and  to be in  full  force  and  effect  on  the  date  of  such
certification, and delivered to the Trustee.

                  "Business Day", when used with respect to any Place of Payment
or any  other  particular  location  referred  to in  this  Indenture  or in the
Securities,  means,  unless  otherwise  specified with respect to any Securities
pursuant  to Section  301,  any day,  other than a Saturday  or Sunday,  that is
neither a legal holiday nor a day on which banking institutions in that Place of
Payment or particular  location are authorized or required by law, regulation or
executive order to close.

                  "CEDEL" means CEDEL Bank, S.A., or its successor.

                  "Commission" means the Securities and Exchange Commission,  as
from time to time  constituted,  created  under the  Securities  Exchange Act of
1934, or, if at any time after  execution of this  instrument such Commission is
not  existing  and  performing  the  duties now  assigned  to it under the Trust
Indenture Act, then the body performing such duties on such date.

                  "Common Depositary" has the meaning specified in Section 304.

                  "Company" means the Person named as the "Company" in the first
paragraph of this Indenture until a successor shall have become such pursuant to
the applicable provisions of this Indenture, and thereafter "Company" shall mean
such successor.


                                        2

<PAGE>

                  "Company  Request" and "Company Order" mean,  respectively,  a
written request or order signed in the name of the Company by the President or a
Vice President,  and by its Treasurer, an Assistant Treasurer,  the Secretary or
an Assistant Secretary, of the Company, and delivered to the Trustee.

                  "Conversion Event" means the cessation of use of (i) a Foreign
Currency  both by the  government  of the country which issued such currency and
for the settlement of transactions by a central bank or other public institution
of or within the international  banking community,  (ii) the ECU both within the
European  Monetary  System  and for the  settlement  of  transactions  by public
institutions  of or within the European  Communities  or (iii) any currency unit
(or  composite  currency)  other than the ECU for the  purposes for which it was
established.

                  "Corporate  Trust  Office"  means the office of the Trustee at
which, at any particular time, its corporate trust business shall be principally
administered, which office at the date hereof is located at _____________.

                  "corporation" includes corporations,  associations,  companies
and business trusts.

                  "coupon" means any interest  coupon  appertaining  to a Bearer
Security.

                  "Custodian" has the meaning specified in Section 501.

                  "Declaration" has the meaning specified in Section 113.

                  "Defaulted Interest" has the meaning specified in Section 307.

                  "Dollar"  or "$"  means a dollar or other  equivalent  unit in
such coin or  currency  of the United  States of America as at the time shall be
legal tender for the payment of public and private debts.

                  "DTC" means The  Depository  Trust  Company,  or any successor
thereto.

                  "ECU" means the European  Currency Unit as defined and revised
from time to time by the Council of the European Communities.

                  "Euroclear"  means Morgan  Guaranty Trust Company of New York,
Brussels Office, or its successor as operator of the Euroclear System.

                  "European  Communities" means the European Economic Community,
the European Coal and Steel Community and the European Atomic Energy Community.

                  "European  Monetary System" means the European Monetary System
established by the Resolution of December 5, 1978 of the Council of the European
Communities.

                  "Event of Default" has the meaning specified in Article Five.

                  "Exchange Date" has the meaning specified in Section 304.

                  "Foreign  Currency"  means  any  currency,  currency  unit  or
composite  currency,  including,  without  limitation,  the ECU,  issued  by the
government of one or more  countries  other than the United States of America or
by any recognized confederation or association of such governments.

                  "Funds from  Operations" for any period means the consolidated
net income of the Company and its  Subsidiaries  for such period  without giving
effect to  depreciation  and  amortization,  gains or losses from  extraordinary
items,  gains or losses on sales of real estate,  gains or losses on investments
in marketable securities

                                        3

<PAGE>

and any  provision/benefit  for income  taxes for such  period,  plus funds from
operations of  unconsolidated  joint  ventures,  all  determined on a consistent
basis in accordance with GAAP.

                  "GAAP"  means  generally  accepted  accounting  principles  in
effect from time to time as used in the United  States  applied on a  consistent
basis.

                  "Government Obligations" means securities which are (i) direct
obligations of the United States of America or the  government  which issued the
Foreign Currency in which the Securities of a particular series are payable, for
the payment of which its full faith and credit is pledged or (ii) obligations of
a Person controlled or supervised by and acting as an agency or  instrumentality
of the United  States of America or such  government  which  issued the  Foreign
Currency  in which the  Securities  of such series are  payable,  the payment of
which is unconditionally guaranteed as a full faith and credit obligation by the
United States of America or such other  government,  which,  in either case, are
not callable or redeemable at the option of the issuer  thereof,  and shall also
include a depository receipt issued by a bank or trust company as custodian with
respect to any such Government  Obligation or a specific  payment of interest on
or principal of any such  Government  Obligation  held by such custodian for the
account of the holder of a depository receipt; provided that (except as required
by law) such  custodian is not  authorized to make any deduction from the amount
payable to the holder of such depository receipt from any amount received by the
custodian in respect of the  Government  Obligation  or the specific  payment of
interest  on or  principal  of  the  Government  Obligation  evidenced  by  such
depository receipt.

                  "Holder"  means,  in the case of a  Registered  Security,  the
Person in whose name a Security is registered  in the Security  Register and, in
the case of a Bearer Security, the bearer thereof and, when used with respect to
any coupon, shall mean the bearer thereof.

                  "Indenture" means this instrument as originally executed or as
it may from time to time be  supplemented  or amended by one or more  indentures
supplemental  hereto entered into pursuant to the applicable  provisions hereof,
and shall include the terms of particular  series of Securities  established  as
contemplated by Section 301; provided,  however,  that, if at any time more than
one Person is acting as Trustee under this instrument,  "Indenture"  shall mean,
with  respect to any one or more series of  Securities  for which such Person is
Trustee,  this instrument as originally  executed or as it may from time to time
be supplemented or amended by one or more applicable provisions hereof and shall
include the terms of the or those particular series of Securities for which such
Person is  Trustee  established  as  contemplated  by  Section  301,  exclusive,
however,  of any  provisions  or terms which  relate  solely to other  series of
Securities  for which such Person is Trustee,  regardless  of when such terms or
provisions  were adopted,  and  exclusive of any  provisions or terms adopted by
means of one or more indentures supplemental hereto executed and delivered after
such Person had become such Trustee but to which such Person,  as such  Trustee,
was not a party.

                  "Indexed Security" means a Security the terms of which provide
that the principal amount thereof payable at Stated Maturity may be more or less
than the principal face amount thereof at original issuance.

                  "interest",  when  used  with  respect  to an  Original  Issue
Discount  Security which by its terms bears interest only after Maturity,  shall
mean interest payable after Maturity,  and, when used with respect to a Security
which provides for the payment of Additional  Amounts  pursuant to Section 1007,
includes such Additional Amounts.

                  "Interest  Payment  Date",  when  used  with  respect  to  any
Security,  means the Stated  Maturity  of an  installment  of  interest  on such
Security.

                  "Maturity",  when used with respect to any Security, means the
date on which the  principal  of such  Security or an  installment  of principal
becomes  due and  payable as therein or herein  provided,  whether at the Stated
Maturity or by declaration  of  acceleration,  notice of  redemption,  notice of
option to elect repayment or otherwise.


                                        4
<PAGE>

                  "Officers'  Certificate"  means a  certificate  signed  by the
President or a Vice President and by the Treasurer, an Assistant Treasurer,  the
Secretary  or an  Assistant  Secretary  of the  Company,  and  delivered  to the
Trustee.

                  "Opinion of Counsel" means a written  opinion of counsel,  who
may be counsel  for the  Company  (including  counsel  who is an employee of the
Company) and who shall be acceptable to the Trustee.

                  "Original  Issue Discount  Security"  means any Security which
provides  for an amount  less than the  principal  amount  thereof to be due and
payable upon a declaration of acceleration of the Maturity  thereof  pursuant to
Section 502.

                  "Outstanding", when used with respect to Securities, means, as
of the date of  determination,  all  Securities  theretofore  authenticated  and
delivered under this Indenture, except:

                  (i)  Securities   theretofore  cancelled  by  the  Trustee  or
delivered to the Trustee for cancellation;

                  (ii)  Securities,  or portions  thereof,  for whose payment or
redemption  or  repayment  at the  option of the Holder  money in the  necessary
amount has been  theretofore  deposited  with the  Trustee  or any Paying  Agent
(other than the  Company) in trust or set aside and  segregated  in trust by the
Company  (if the Company  shall act as its own Paying  Agent) for the Holders of
such  Securities and any coupons  appertaining  thereto;  provided that, if such
Securities  are to be redeemed,  notice of such  redemption  has been duly given
pursuant to this Indenture or provision therefor satisfactory to the Trustee has
been made;

                  (iii)  Securities,  except to the extent  provided in Sections
1402 and 1403, with respect to which the Company has effected  defeasance and/or
covenant defeasance as provided in Article Fourteen;

                  (iv)  Securities  which have been paid pursuant to Section 306
or in exchange for or in lieu of which other Securities have been  authenticated
and  delivered  pursuant to this  Indenture,  other than any such  Securities in
respect  of  which  there  shall  have  been  presented  to  the  Trustee  proof
satisfactory  to it that such  Securities  are held by a bona fide  purchaser in
whose hands such Securities are valid obligations of the Company; and

                  (v) Securities converted into Common Shares,  Preferred Shares
or other  securities  of the  Company  pursuant  to or in  accordance  with this
Indenture if the terms of such Securities provide for convertibility pursuant to
Section 301;

provided,  however,  that in  determining  whether the Holders of the  requisite
principal amount of the Outstanding  Securities have given any request,  demand,
authorization,  direction, notice, consent or waiver hereunder or are present at
a meeting of  Holders  for quorum  purposes,  and for the  purpose of making the
calculations  required  by TIA  Section  313,  (i) the  principal  amount  of an
Original   Issue   Discount   Security  that  may  be  counted  in  making  such
determination or calculation and that shall be deemed to be Outstanding for such
purpose  shall be equal to the  amount of  principal  thereof  that would be (or
shall  have  been  declared  to be)  due  and  payable,  at  the  time  of  such
determination,  upon a  declaration  of  acceleration  of the  maturity  thereof
pursuant to Section 502, (ii) the principal  amount of any Security  denominated
in a Foreign  Currency  that may be  counted  in making  such  determination  or
calculation and that shall be deemed Outstanding for such purpose shall be equal
to the Dollar equivalent, determined pursuant to Section 301 as of the date such
Security is originally  issued by the Company,  of the principal  amount (or, in
the case of an Original Issue  Discount  Security,  the Dollar  equivalent as of
such date of original  issuance of the amount  determined  as provided in clause
(i) above) of such Security,  (iii) the principal amount of any Indexed Security
that may be counted in making such  determination  or calculation and that shall
be deemed  outstanding  for such purpose  shall be equal to the  principal  face
amount of such Indexed Security at original issuance,  unless otherwise provided
with respect to such Security pursuant to Section 301, and (iv) Securities owned
by the Company or any other obligor upon the  Securities or any Affiliate of the
Company  or of such  other  obligor  shall be  disregarded  and deemed not to be
Outstanding,  except that, in determining whether the Trustee shall be protected
in making such

                                        5
<PAGE>

calculation  or  in  relying  upon  any  such  request,  demand,  authorization,
direction, notice, consent or waiver, only Securities which the Trustee knows to
be so owned shall be so disregarded. Securities so owned which have been pledged
in good faith may be regarded as Outstanding  if the pledgee  establishes to the
satisfaction  of the Trustee the pledgee's  right so to act with respect to such
Securities and that the pledgee is not the Company or any other obligor upon the
Securities or any Affiliate of the Company or of such other obligor.

                  "Paying  Agent" means any Person  authorized by the Company to
pay the  principal of (and  premium,  if any) or interest on any  Securities  or
coupons on behalf of the Company.

                  "Person" means any individual, corporation, partnership, joint
venture,  association,  joint-stock  company,  trust, limited liability company,
unincorporated organization or government or any agency or political subdivision
thereof.

                  "Place of Payment",  when used with respect to the  Securities
of or within any series,  means the place or places where the  principal of (and
premium,  if any) and  interest on such  Securities  are payable as specified as
contemplated by Sections 301 and 1002.

                  "Predecessor  Security" of any particular Security means every
previous Security evidencing all or a portion of the same debt as that evidenced
by such  particular  Security;  and,  for the purposes of this  definition,  any
Security  authenticated  and  delivered  under Section 306 in exchange for or in
lieu of a mutilated, destroyed, lost or stolen Security or a Security to which a
mutilated,  destroyed,  lost or  stolen  coupon  appertains  shall be  deemed to
evidence the same debt as the mutilated,  destroyed,  lost or stolen Security or
the  Security  to  which  the  mutilated,   destroyed,  lost  or  stolen  coupon
appertains.

                  "Redemption  Date",  when used with respect to any Security to
be redeemed, in whole or in part, means the date fixed for such redemption by or
pursuant to this Indenture.

                  "Redemption  Price", when used with respect to any Security to
be  redeemed,  means the price at which it is to be  redeemed  pursuant  to this
Indenture.

                  "Registered  Security"  shall  mean any  Security  established
pursuant to Section 201 which is registered in the Security Register.

                  "Regular Record Date" for the interest payable on any Interest
Payment Date on the Registered Securities of or within any series means the date
specified  for that purpose as  contemplated  by Section  301,  whether or not a
Business Day.

                  "Repayment Date" means, when used with respect to any Security
to be repaid at the option of the Holder,  the date fixed for such  repayment by
or pursuant to this Indenture.

                  "Responsible Officer",  when used with respect to the Trustee,
means the chairman or vice-chairman  of the board of directors,  the chairman or
vice-chairman  of  the  executive  committee  of the  board  of  directors,  the
president,  any vice president  (whether or not designated by a number or a word
or words added before or after the title "vice president"),  the secretary,  any
assistant secretary,  the treasurer,  any assistant treasurer,  the cashier, any
assistant cashier, any trust officer, the controller or any other officer of the
Trustee  customarily  performing  functions similar to those performed by any of
the above  designated  officers  and also  means with  respect  to a  particular
corporate  trust  matter,  any other  officer  to whom such  matter is  referred
because of such officer's knowledge and familiarity with the particular subject.

                  "Security" has the meaning stated in the first recital of this
Indenture and, more particularly, means any Security or Securities authenticated
and delivered  under this  Indenture;  provided,  however,  that, if at any time
there  is  more  than  one  Person  acting  as  Trustee  under  this  Indenture,
"Securities" with respect to the Indenture as

                                        6
<PAGE>

to which such  Person is  Trustee  shall  have the  meaning  stated in the first
recital  of  this  Indenture  and  shall  more   particularly   mean  Securities
authenticated  and  delivered  under  this  Indenture,  exclusive,  however,  of
Securities of any series as to which such Person is not Trustee.

                  "Security   Register"  and  "Security   Registrar"   have  the
respective meanings specified in Section 305.

                  "Significant  Subsidiary"  means  any  Subsidiary  which  is a
"significant  subsidiary" (as defined in Article I, Rule 1-02 of Regulation S-X,
promulgated under the Securities Act of 1933, as amended) of the Company.

                  "Special  Record  Date"  for  the  payment  of  any  Defaulted
Interest on the Registered Securities of or within any series means a date fixed
by the Trustee pursuant to Section 307.

                  "Stated  Maturity",  when used with respect to any Security or
any  installment  of  principal  thereof  or  interest  thereon,  means the date
specified in such Security or a coupon representing such installment of interest
as the fixed date on which the principal of such Security or such installment of
principal or interest is due and payable.

                  "Subsidiary" means a corporation a majority of the outstanding
voting stock of which is owned, directly or indirectly, by the Company or by one
or more other Subsidiaries of the Company.  For the purposes of this definition,
"voting  stock" means stock having  voting power for the election of  directors,
whether at all times or only so long as no senior class of stock has such voting
power by reason of any contingency.

                  "Trust  Indenture Act" or "TIA" means the Trust  Indenture Act
of 1939,  as amended and as in force at the date as of which this  Indenture was
executed, except as provided in Section 905.

                  "Trustee" means the Person named as the "Trustee" in the first
paragraph of this  Indenture  until a successor  Trustee  shall have become such
pursuant  to  the  applicable  provisions  of  this  Indenture,  and  thereafter
"Trustee"  shall mean or include  each  Person who is then a Trustee  hereunder;
provided,  however,  that if at any  time  there is more  than one such  Person,
"Trustee" as used with respect to the  Securities  of any series shall mean only
the Trustee with respect to Securities of that series.

                  "United States" means, unless otherwise specified with respect
to any  Securities  pursuant  to  Section  301,  the  United  States of  America
(including  the states and the  District  of  Columbia),  its  territories,  its
possessions and other areas subject to its jurisdiction.

                  "United States person" means,  unless otherwise specified with
respect to any  Securities  pursuant  to Section  301,  an  individual  who is a
citizen or resident of the United States,  a  corporation,  partnership or other
entity created  organized in or under the laws of the United States or an estate
or trust the income of which is subject to United States federal income taxation
regardless of its source.

                  "Yield to Maturity"  means the yield to maturity,  computed at
the time of  issuance  of a Security  (or,  if  applicable,  at the most  recent
redetermination  of interest on such Security) and as set forth in such Security
in accordance  with  generally  accepted  United  States bond yield  computation
principles.

                  SECTION 102.  Compliance  Certificates and Opinions.  Upon any
application  or request by the Company to the  Trustee to take any action  under
any  provision of this  Indenture,  the Company  shall furnish to the Trustee an
Officers'  Certificate stating that all conditions  precedent,  if any, provided
for in this  Indenture  relating to the proposed  action have been complied with
and an Opinion of Counsel  stating  that in the opinion of such counsel all such
conditions  precedent,  if any, have been complied with, except that in the case
of any such  application or request as to which the furnishing of such documents
is  specifically  required by any provision of this  Indenture  relating to such
particular  application or request, no additional certificate or opinion need be
furnished.

                                        7
<PAGE>

                  Every certificate or opinion with respect to compliance with a
condition or covenant  provided for in this  Indenture  (including  certificates
delivered pursuant to Section 1006) shall include:

                           (1) a statement  that each  individual  signing  such
                  certificate or opinion has read such condition or covenant and
                  the definitions herein relating thereto;

                           (2) a brief  statement  as to the nature and scope of
                  the examination or investigation  upon which the statements or
                  opinions contained in such certificate or opinion are based;

                           (3) a  statement  that,  in the  opinion of each such
                  individual,  he has made such  examination or investigation as
                  is necessary  to enable him to express an informed  opinion as
                  to whether or not such condition or covenant has been complied
                  with; and

                           (4) a statement as to whether, in the opinion of each
                  such individual,  such condition or covenant has been complied
                  with.

                  SECTION 103.  Form of Documents  Delivered to Trustee.  In any
case where  several  matters are  required to be  certified  by or covered by an
opinion of any specified  Person,  it is not necessary  that all such matters be
certified  by, or covered by the opinion of, only one such Person,  or that they
be so certified or covered by only one document, but one such Person may certify
or give an opinion as to some  matters and one or more other such  Persons as to
other  matters,  and any such  Person may  certify or give an opinion as to such
matters in one or several documents.

                  Any certificate or opinion of an officer of the Company may be
based, insofar as it relates to legal matters,  upon an Opinion of Counsel, or a
certificate of or representations  by counsel,  unless such officer knows, or in
the exercise of reasonable  care should know,  that the opinion,  certificate or
representations  with  respect  to the  matters  upon which his  certificate  or
opinion is based are  erroneous.  Any such  Opinion of Counsel,  certificate  or
representations may be based,  insofar as it relates to factual matters,  upon a
certificate or opinion of, or representations  by, an officer or officers of the
Company  or any  Subsidiary  stating  that the  information  as to such  factual
matters is in the  possession  of the  Company or such  Subsidiary,  unless such
counsel  knows that the  certificate  or opinion or  representations  as to such
matters are erroneous.

                  Where any Person is required  to make,  give or execute two or
more applications,  requests, consents,  certificates,  statements,  opinions or
other instruments under this Indenture,  they may, but need not, be consolidated
and form one instrument.

                  SECTION  104.  Acts  of  Holders.  (a)  Any  request,  demand,
authorization,  direction,  notice,  consent, waiver or other action provided by
this Indenture to be given or taken by Holders of the Outstanding  Securities of
all series or one or more  series,  as the case may be, may be  embodied  in and
evidenced by one or more  instruments of  substantially  similar tenor signed by
such Holders in person or by agents duly appointed in writing.  If Securities of
a series are issuable as Bearer Securities, any request, demand,  authorization,
direction, notice, consent, waiver or other action provided by this Indenture to
be given or taken by Holders of Securities of such series may, alternatively, be
embodied in and  evidenced by the record of Holders of Securities of such series
voting  in favor  thereof,  either in person or by  proxies  duly  appointed  in
writing,  at any meeting of Holders of Securities of such series duly called and
held in accordance with the provisions of Article  Fifteen,  or a combination of
such  instruments  and any such  record.  Except as herein  otherwise  expressly
provided, such action shall become effective when such instrument or instruments
or record or both are delivered to the Trustee and, where it is hereby expressly
required,  to the Company.  Such  instrument or instruments  and any such record
(and the action  embodied  therein and evidenced  thereby) are herein  sometimes
referred to as the "Act" of the Holders  signing such  instrument or instruments
or so voting at any such meeting.  Proof of execution of any such  instrument or
of a writing  appointing  any such  agent,  or of the holding by any Person of a
Security,  shall be sufficient  for any purpose of this Indenture and conclusive
in favor of the  Trustee  and the  Company  and any agent of the  Trustee or the
Company, if made in

                                        8
<PAGE>

the manner  provided  in this  Section.  The record of any meeting of Holders of
Securities shall be proved in the manner provided in Section 1506.

                  (b) The fact and date of the  execution  by any  Person of any
such  instrument  or writing may be proved by the affidavit of a witness of such
execution or by a certificate of a notary public or other officer  authorized by
law to take  acknowledgments  of deeds,  certifying that the individual  signing
such instrument or writing acknowledged to him the execution thereof. Where such
execution  is by a  signer  acting  in a  capacity  other  than  his  individual
capacity,  such certificate or affidavit shall also constitute  sufficient proof
of his authority.  The fact and date of the execution of any such  instrument or
writing,  or the authority of the Person  executing the same, may also be proved
in any other reasonable manner which the Trustee deems sufficient.

                  (c) The ownership of Registered  Securities shall be proved by
the Security Register.

                  (d) The  ownership of Bearer  Securities  may be proved by the
production  of  such  Bearer  Securities  or  by  a  certificate   executed,  as
depositary,  by any trust company,  bank, banker or other  depositary,  wherever
situated, if such certificate shall be deemed by the Trustee to be satisfactory,
showing that at the date therein  mentioned such Person had on deposit with such
depositary, or exhibited to it, the Bearer Securities therein described; or such
facts may be proved by the  certificate  or affidavit of the Person holding such
Bearer Securities,  if such certificate or affidavit is deemed by the Trustee to
be  satisfactory.  The Trustee and the Company may assume that such ownership of
any Bearer Security continues until (1) another certificate or affidavit bearing
a later date issued in respect of the same Bearer  Security is produced,  or (2)
such Bearer  Security is  produced to the Trustee by some other  Person,  or (3)
such Bearer  Security is surrendered in exchange for a Registered  Security,  or
(4) such  Bearer  Security is no longer  Outstanding.  The  ownership  of Bearer
Securities  may also be proved  in any other  manner  which  the  Trustee  deems
sufficient.

                  (e)  If  the  Company   shall  solicit  from  the  Holders  of
Registered Securities any request,  demand,  authorization,  direction,  notice,
consent,  waiver or other Act, the Company may, at its option, in or pursuant to
a Board  Resolution,  fix in  advance  a record  date for the  determination  of
Holders entitled to give such request, demand, authorization, direction, notice,
consent, waiver or other Act, but the Company shall have no obligation to do so.
Notwithstanding  TIA Section  316(c),  such record date shall be the record date
specified  in or  pursuant to such Board  Resolution,  which shall be a date not
earlier  than  the date 30 days  prior  to the  first  solicitation  of  Holders
generally in connection  therewith and not later than the date such solicitation
is  completed.   If  such  a  record  date  is  fixed,  such  request,   demand,
authorization,  direction,  notice,  consent,  waiver  or other Act may be given
before or after such record date, but only the Holders of record at the close of
business on such  record date shall be deemed to be Holders for the  purposes of
determining   whether  Holders  of  the  requisite   proportion  of  Outstanding
Securities  have  authorized  or agreed or  consented to such  request,  demand,
authorization,  direction,  notice,  consent,  waiver or other Act, and for that
purpose the  Outstanding  Securities  shall be computed as of such record  date;
provided that no such authorization, agreement or consent by the Holders on such
record date shall be deemed effective unless it shall become effective  pursuant
to the  provisions  of this  Indenture  not later than eleven  months  after the
record date.

                  (f) Any request,  demand,  authorization,  direction,  notice,
consent,  waiver or other Act of the  Holder of any  Security  shall  bind every
future Holder of the same Security and the Holder of every Security  issued upon
the registration of transfer thereof or in exchange  therefor or in lieu thereof
in respect of anything done, omitted or suffered to be done by the Trustee,  any
Security Registrar, any Paying Agent, any Authenticating Agent or the Company in
reliance  thereon,  whether  or not  notation  of such  action is made upon such
Security.

                  SECTION  105.  Notices,  etc.,  to Trustee  and  Company.  Any
request,  demand,  authorization,  direction,  notice, consent, waiver or Act of
Holders or other  document  provided or permitted  by this  Indenture to be made
upon, given or furnished to, or filed with,


                                        9
<PAGE>

                           (1) the Trustee by any Holder or by the Company shall
                  be  sufficient  for every  purpose  hereunder if made,  given,
                  furnished  or filed in writing  to or with the  Trustee at its
                  Corporate Trust Office, Attention: ______________________, or

                           (2) the Company by the Trustee or by any Holder shall
                  be sufficient for every purpose  hereunder  (unless  otherwise
                  herein  expressly  provided)  if in writing and mailed,  first
                  class postage prepaid,  to the Company  addressed to it at the
                  address  of  its  principal  office  specified  in  the  first
                  paragraph of this Indenture or at any other address previously
                  furnished in writing to the Trustee by the Company.

                  SECTION 106. Notice to Holders;  Waiver.  Where this Indenture
provides  for  notice of any event to Holders of  Registered  Securities  by the
Company  or the  Trustee,  such  notice  shall  be  sufficiently  given  (unless
otherwise  herein  expressly  provided)  if in writing and  mailed,  first-class
postage  prepaid,  to each such Holder affected by such event, at his address as
it appears in the Security  Register,  not later than the latest  date,  and not
earlier than the earliest date, prescribed for the giving of such notice. In any
case where notice to Holders of Registered  Securities is given by mail, neither
the failure to mail such notice,  nor any defect in any notice so mailed, to any
particular  Holder shall affect the  sufficiency  of such notice with respect to
other  Holders of  Registered  Securities  or the  sufficiency  of any notice to
Holders of Bearer  Securities given as provided  herein.  Any notice mailed to a
Registered Holder in the manner herein  prescribed shall be conclusively  deemed
to have been  received  by such  Holder,  whether  or not such  Holder  actually
receives such notice.

                  If by reason of the suspension of or irregularities in regular
mail service or by reason of any other cause it shall be  impracticable  to give
such notice by mail, then such notification to Holders of Registered  Securities
as shall be made with the approval of the Trustee shall  constitute a sufficient
notification to such Holders for every purpose hereunder.

                  Except as  otherwise  expressly  provided  herein or otherwise
specified  with respect to any  Securities  pursuant to Section 301,  where this
Indenture provides for notice to Holders of Bearer Securities of any event, such
notice shall be  sufficiently  given if published in an Authorized  Newspaper in
The City of New York and in such  other  city or cities as may be  specified  in
such  Securities on a Business Day,  such  publication  to be not later than the
latest date, and not earlier than the earliest  date,  prescribed for the giving
of such  notice.  Any such notice shall be deemed to have been given on the date
of such  publication  or, if published  more than once, on the date of the first
such publication.

                  If  by  reason  of  the   suspension  of  publication  of  any
Authorized Newspaper or Authorized Newspapers or by reason of any other cause it
shall be impracticable to publish any notice to Holders of Bearer  Securities as
provided above,  then such notification to Holders of Bearer Securities as shall
be given with the approval of the Trustee shall constitute  sufficient notice to
such Holders for every purpose hereunder.  Neither the failure to give notice by
publication to any particular Holder of Bearer Securities as provided above, nor
any defect in any notice so  published,  shall  affect the  sufficiency  of such
notice with respect to other Holders of Bearer  Securities or the sufficiency of
any notice to Holders of Registered Securities given as provided herein.

                  Any request, demand, authorization, direction, notice, consent
or waiver  required or permitted  under this  Indenture  shall be in the English
language, except that any published notice may be in an official language of the
country of publication.

                  Where this Indenture  provides for notice in any manner,  such
notice may be waived in writing by the Person  entitled to receive  such notice,
either  before or after the event,  and such waiver shall be the  equivalent  of
such notice.  Waivers of notice by Holders shall be filed with the Trustee,  but
such filing  shall not be a condition  precedent  to the  validity of any action
taken in reliance upon such waiver.

                  SECTION 107.  Effect of Headings  and Table of  Contents.  The
Article  and  Section  headings  herein  and  the  Table  of  Contents  are  for
convenience only and shall not affect the construction hereof.

                                       10
<PAGE>

                  SECTION  108.  Successors  and  Assigns.   All  covenants  and
agreements  in this  Indenture  by the  Company  shall bind its  successors  and
assigns, whether so expressed or not.

                  SECTION 109.  Separability  Clause.  In case any  provision in
this  Indenture  or in any  Security  or coupon  shall be  invalid,  illegal  or
unenforceable,  the  validity,  legality  and  enforceability  of the  remaining
provisions shall not in any way be affected or impaired thereby.

                  SECTION 110. Benefits of Indenture.  Nothing in this Indenture
or in the Securities or coupons,  express or implied,  shall give to any Person,
other than the parties hereto,  any Security  Registrar,  any Paying Agent,  any
Authenticating  Agent and their successors hereunder and the Holders any benefit
or any legal or equitable right, remedy or claim under this Indenture.

                  SECTION 111.  Governing Law. This Indenture and the Securities
and coupons shall be governed by and construed in accordance with the law of The
Commonwealth  of  Massachusetts.  This Indenture is subject to the provisions of
the TIA that are required to be part of this Indenture and shall,  to the extent
applicable, be governed by such provisions.

                  SECTION 112.  Legal  Holidays.  In any case where any Interest
Payment Date, Redemption Date, Repayment Date, sinking fund payment date, Stated
Maturity or Maturity of any Security shall not be a Business Day at any Place of
Payment,  then  (notwithstanding  any other  provision of this  Indenture or any
Security or coupon other than a provision in the  Securities of any series which
specifically states that such provision shall apply in lieu hereof),  payment of
interest or any Additional Amounts or principal (and premium, if any) or sinking
fund payment need not be made at such Place of Payment on such date,  but may be
made on the next succeeding  Business Day at such Place of Payment with the same
force and  effect as if made on the  Interest  Payment  Date,  Redemption  Date,
Repayment  Date or sinking  fund  payment  date,  or at the Stated  Maturity  or
Maturity;  provided  that no interest  shall accrue on the amount so payable for
the period from and after such Interest Payment Date, Redemption Date, Repayment
Date,  sinking fund payment date,  Stated Maturity or Maturity,  as the case may
be.

                  SECTION 113. No Personal  Liability.  THE AMENDED AND RESTATED
DECLARATION  OF  TRUST OF THE  COMPANY  DATED  JULY 1,  1994,  A COPY OF  WHICH,
TOGETHER WITH ALL AMENDMENTS THERETO (THE  "DECLARATION"),  IS DULY FILED IN THE
OFFICE OF THE DEPARTMENT OF  ASSESSMENTS  AND TAXATION OF THE STATE OF MARYLAND,
PROVIDES THAT THE NAME "HEALTH AND  RETIREMENT  PROPERTIES  TRUST" REFERS TO THE
TRUSTEES UNDER THE DECLARATION COLLECTIVELY AS TRUSTEES, BUT NOT INDIVIDUALLY OR
PERSONALLY, AND THAT NO TRUSTEE, OFFICER, SHAREHOLDER,  EMPLOYEE OR AGENT OF THE
COMPANY SHALL BE HELD TO ANY PERSONAL LIABILITY,  JOINTLY OR SEVERALLY,  FOR ANY
OBLIGATION  OF, OR CLAIM  AGAINST,  THE  COMPANY.  ALL PERSONS  DEALING WITH THE
COMPANY,  IN ANY WAY,  SHALL  LOOK  ONLY TO THE  ASSETS OF THE  COMPANY  FOR THE
PAYMENT OF ANY SUM OR THE PERFORMANCE OF ANY OBLIGATION.

                                   ARTICLE TWO

                                SECURITIES FORMS

                  SECTION 201. Forms of Securities.  The Registered  Securities,
if any,  of each  series and the Bearer  Securities,  if any, of each series and
related coupons shall be in  substantially  the forms as shall be established in
one or more indentures  supplemental  hereto or approved from time to time by or
pursuant to a Board  Resolution in accordance  with Section 301, shall have such
appropriate  insertions,  omissions,  substitutions  and other variations as are
required or permitted by this  Indenture or any indenture  supplemental  hereto,
and may  have  such  letters,  numbers  or  other  marks  of  identification  or
designation and such legends or  endorsements  placed thereon as the Company may
deem  appropriate  and as are  not  inconsistent  with  the  provisions  of this
Indenture, or as may be

                                       11
<PAGE>

required to comply  with any law or with any rule or  regulation  made  pursuant
thereto or with any rule or regulation of any  securities  exchange on which the
Securities may be listed, or to conform to usage.

                  Unless  otherwise  specified as  contemplated  by Section 301,
Bearer Securities shall have interest coupons attached.

                  The  definitive  Securities  and  coupons  shall  be  printed,
lithographed  or engraved or produced by any  combination  of these methods on a
steel engraved border or steel engraved  borders or may be produced in any other
manner,  all  as  determined  by the  officers  of the  Company  executing  such
Securities  or coupons,  as evidenced by their  execution of such  Securities or
coupons.

                  SECTION 202. Form of Trustee's  Certificate of Authentication.
Subject to Section 611, the Trustee's  certificate of authentication shall be in
substantially the following form:

         This is one of the Securities of the series designated therein referred
to in the within-mentioned Indenture.

                           ---------------------------------
                                                as Trustee


                           By______________________________
                                        Authorized Officer

                  SECTION 203. Securities Issuable in Global Form. If Securities
of or within a series  are  issuable  in global  form,  as  specified  in and as
contemplated by Section 301, then, notwithstanding clause (8) of Section 301 and
the  provisions of Section 302, any such Security  shall  represent  such of the
Outstanding  Securities  of such  series as shall be  specified  therein and may
provide that it shall represent the aggregate  amount of Outstanding  Securities
of such series from time to time endorsed  thereon and that the aggregate amount
of Outstanding  Securities of such series  represented  thereby may from time to
time be  increased  or  decreased to reflect  exchanges.  Any  endorsement  of a
Security in global form to reflect  the amount,  or any  increase or decrease in
the amount, of Outstanding  Securities  represented thereby shall be made by the
Trustee in such manner and upon instructions  given by such Person or Persons as
shall be  specified  therein  or in the  Company  Order to be  delivered  to the
Trustee pursuant to Section 303 or 304. Subject to the provisions of Section 303
and, if  applicable,  Section 304, the Trustee  shall  deliver and redeliver any
Security in permanent global form in the manner and upon  instructions  given by
the Person or Persons specified therein or in the applicable Company Order. If a
Company  Order  pursuant to Section 303 or 304 has been, or  simultaneously  is,
delivered,  any  instructions  by the Company  with  respect to  endorsement  or
delivery or redelivery of a Security in global form shall be in writing but need
not  comply  with  Section  102 and need not be  accompanied  by an  Opinion  of
Counsel.

                  The provisions of the last sentence of Section 303 shall apply
to any Security  represented  by a Security in global form if such  Security was
never issued and sold by the Company and the Company delivers to the Trustee the
Security in global  form  together  with  written  instructions  (which need not
comply with  Section 102 and need not be  accompanied  by an Opinion of Counsel)
with regard to the reduction in the principal  amount of Securities  represented
thereby,  together with the written statement  contemplated by the last sentence
of Section 303.

                  Notwithstanding   the   provisions  of  Section  307,   unless
otherwise  specified as contemplated by Section 301, payment of principal of and
any premium and interest on any Security in permanent  global form shall be made
to the Person or Persons specified therein.

                  Notwithstanding  the  provisions  of Section 308 and except as
provided in the preceding  paragraph,  the Company, the Trustee and any agent of
the Company and the Trustee shall treat as the Holder of such  principal  amount
of Outstanding  Securities represented by a permanent global Security (i) in the
case of a permanent global

                                       12
<PAGE>

Security in registered  form,  the Holder of such permanent  global  Security in
registered  form or (ii) in the case of a  permanent  global  Security in bearer
form, Euroclear or CEDEL.


                                  ARTICLE THREE

                                 THE SECURITIES

                  SECTION  301.  Amount  Unlimited;   Issuable  in  Series.  The
aggregate  principal  amount  of  Securities  which  may  be  authenticated  and
delivered under this Indenture is unlimited.

                  The  Securities  may be  issued in one or more  series.  There
shall be established  in one or more Board  Resolutions or pursuant to authority
granted by one or more Board Resolutions and, subject to Section 303, set forth,
or  determined  in  the  manner  provided,  in  an  Officers'  Certificate,   or
established in one or more indentures supplemental hereto, prior to the issuance
of Securities of any series, any or all of the following, as applicable (each of
which (except for the matters set forth in clauses (1), (2) and (14) below),  if
so provided,  may be determined from time to time by the Company with respect to
unissued Securities of the series when issued from time to time):

                  (1) the title of the  Securities  of the series  (which  shall
         distinguish  the  Securities  of such series  from all other  series of
         Securities);

                  (2) any  limit  upon the  aggregate  principal  amount  of the
         Securities of the series that may be authenticated  and delivered under
         this Indenture (except for Securities  authenticated and delivered upon
         registration  of transfer of, or in exchange  for, or in lieu of, other
         Securities  of the series  pursuant to Section 304, 305, 306, 906, 1107
         or 1305);

                  (3) the date or dates,  or the  method  by which  such date or
         dates will be  determined,  on which the principal of the Securities of
         the series shall be payable;

                  (4) the rate or rates at which the  Securities  of the  series
         shall bear interest,  if any, or the method by which such rate or rates
         shall be  determined,  the date or dates from which such interest shall
         accrue or the method by which such date or dates  shall be  determined,
         the Interest  Payment  Dates on which such interest will be payable and
         the  Regular  Record  Date,  if any,  for the  interest  payable on any
         Registered  Security on any  Interest  Payment  Date,  or the method by
         which such date shall be determined,  and the basis upon which interest
         shall be  calculated  if other  than that of a  360-day  year of twelve
         30-day months;

                  (5) the place or places  where the  principal  of, any premium
         and  interest  on and any  Additional  Amounts  payable in respect  of,
         Securities of the series shall be payable, any Registered Securities of
         the series may be surrendered for registration of transfer, exchange or
         conversion  and notices or demands to or upon the Company in respect of
         the Securities of the series and this Indenture may be served;

                  (6) the period or periods within which or the date or dates on
         which,  the price or prices at which,  and other  terms and  conditions
         upon which  Securities  of the series may be  redeemed,  in whole or in
         part,  at the  option of the  Company,  if the  Company  is to have the
         option;

                  (7) the obligation, if any, of the Company to redeem, repay or
         purchase  Securities  of the series  pursuant  to any  sinking  fund or
         analogous  provision  or at the  option  of a Holder  thereof,  and the
         period or periods within which or the date or dates on which, the price
         or  prices  at  which,  and  other  terms  and  conditions  upon  which
         Securities  of the series shall be redeemed,  repaid or  purchased,  in
         whole or in part, pursuant to such obligation;

                                       13
<PAGE>

                  (8) if other than  denominations  of $1,000  and any  integral
         multiple thereof, the denominations in which any Registered  Securities
         of the series shall be issuable and the  denomination or  denominations
         in which any Bearer Securities of the series shall be issuable;

                  (9) if other than Dollars,  the Foreign Currency or Currencies
         in which payment of the principal of (and premium,  if any),  interest,
         if any, on, and  Additional  Amounts,  if any, on the Securities of the
         series shall be payable, in which the Securities of the series shall be
         redeemed or purchased or in which the Securities of the series shall be
         denominated;

                  (10) if other than the principal  amount thereof,  the portion
         of the  principal  amount of  Securities  of the  series  that shall be
         payable  upon  declaration  of  acceleration  of the  Maturity  thereof
         pursuant to Section 502 or, if applicable, the portion of the principal
         amount of  Securities of the series that is  convertible  in accordance
         with the  provisions  of this  Indenture,  or the  method by which such
         portion shall be determined;

                  (11)  whether  the amount of  payments  of  principal  of (and
         premium,  if any) or interest,  if any, on the Securities of the series
         may be determined  with reference to an index,  formula or other method
         (which index,  formula or method may be based,  without limitation,  on
         one  or  more  currencies,   currency  units,   composite   currencies,
         commodities,  equity indices or other indices), and the manner in which
         such amounts shall be determined;

                  (12)  whether  the  principal  of  (and  premium,  if  any) or
         interest, if any on or Additional Amounts, if any, on the Securities of
         the series  are to be  payable,  at the  election  of the  Company or a
         Holder thereof, in a currency or currencies,  currency unit or units or
         composite  currency  or  currencies  other  than  that  in  which  such
         Securities  are  denominated  or stated to be  payable,  the  period or
         periods  within which,  and the terms and conditions  upon which,  such
         election  may be made,  and the time and manner of, and identity of the
         exchange rate agent with  responsibility  for  determining the exchange
         rate  between the  currency or  currencies,  currency  unit or units or
         composite   currency  or  currencies  in  which  such   Securities  are
         denominated  or stated to be payable and the  currency  or  currencies,
         currency  unit or units or composite  currency or  currencies  in which
         such Securities are to be paid;

                  (13)  provisions,  if  any,  granting  special  rights  to the
         Holders of Securities of the series upon the  occurrence of such events
         as may be specified;

                  (14) any deletions from,  modifications of or additions to the
         Events  of  Default  or  covenants  of the  Company  set  forth in this
         Indenture with respect to Securities of the series (whether or not such
         Events of  Default  or  covenants  are  consistent  with the  Events of
         Default or covenants set forth herein);

                  (15)  whether  Securities  of the series are to be issuable as
         Registered  Securities,  Bearer Securities (with or without coupons) or
         both,  any  restrictions  applicable to the offer,  sale or delivery of
         Bearer  Securities  and the terms upon which Bearer  Securities  of the
         series may be exchanged  for  Registered  Securities  of the series and
         vice versa (if permitted by applicable laws and  regulations),  whether
         any Securities of the series are to be issuable  initially in temporary
         global form and whether any Securities of the series are to be issuable
         in permanent  global form with or without  coupons and, if so,  whether
         beneficial  owners of interests in any such permanent  global  Security
         may exchange such  interests for  Securities of such series and of like
         tenor of any authorized  form and  denomination  and the  circumstances
         under which any such  exchanges may occur,  if other than in the manner
         provided in Section 305,  and, if  Registered  Securities of the series
         are to be issuable as a global Security, the identity of the depositary
         for such series;

                  (16) the date as of which any Bearer  Securities of the series
         and any temporary global Security representing  Outstanding  Securities
         of the  series  shall  be dated  if  other  than  the date of  original
         issuance of the first Security of the series to be issued;

                                       14
<PAGE>

                  (17)  the  Person  to  whom  any  interest  on any  Registered
         Security of the series  shall be  payable,  if other than the Person in
         whose name that  Security (or one or more  Predecessor  Securities)  is
         registered at the close of business on the Regular Record Date for such
         interest,  the manner in which,  or the Person to whom, any interest on
         any Bearer  Security of the series shall be payable,  if otherwise than
         upon presentation and surrender of the coupons  appertaining thereto as
         they severally mature, and the extent to which, or the manner in which,
         any  interest  payable on a  temporary  global  Security on an Interest
         Payment  Date  will be paid if other  than in the  manner  provided  in
         Section 304;

                  (18) the  applicability,  if any, of Sections 1402 and/or 1403
         to the Securities of the series and any provisions in modification  of,
         in addition to or in lieu of any of the provisions of Article Fourteen;

                  (19) if the  Securities  of such  series are to be issuable in
         definitive  form  (whether  upon  original  issue or upon exchange of a
         temporary  Security  of such  series)  only  upon  receipt  of  certain
         certificates or other  documents or  satisfaction of other  conditions,
         then  the  form  and/or  terms  of  such  certificates,   documents  or
         conditions;

                  (20) if the Securities of the series are to be issued upon the
         exercise of warrants, the time, manner and place for such Securities to
         be authenticated and delivered;

                  (21) whether and under what circumstances the Company will pay
         Additional Amounts as contemplated by Section 1007 on the Securities of
         the series to any Holder who is not a United States  person  (including
         any modification to the definition of such term) in respect of any tax,
         assessment or governmental  charge and, if so, whether the Company will
         have  the  option  to  redeem  such  Securities  rather  than  pay such
         Additional Amounts (and the terms of any such option);

                  (22) the  obligation,  if any,  of the  Company  to permit the
         conversion  of the  Securities  of such series  into  Common  Shares or
         Preferred  Shares of the Company or other  securities,  as the case may
         be, and the terms and conditions  upon which such  conversion  shall be
         effected (including,  without limitation,  the initial conversion price
         or rate,  the  conversion  period,  any  adjustment  of the  applicable
         conversion  price and any  requirements  relative to the reservation of
         such shares for purposes of conversion);

                  (23) the terms and  conditions,  if any, upon which payment of
         the Securities of such series shall be  subordinated  to the Securities
         of another  series or other  indebtedness  of the  Company  (including,
         without limitation, indebtedness which ranks senior to such Securities;
         restrictions on payments to Holders of such Securities  while a default
         with respect to such senior  indebtedness is continuing;  restrictions,
         if any,  on payments to the  Holders of such  Securities  following  an
         Event of Default;  and any  requirements for Holders of such Securities
         to remit certain payments to the holders of such senior indebtedness);

                  (24) if the Securities of the series are to be guaranteed, the
         term and conditions of such guarantee;

                  (25) if other than the Trustee,  the identity of each Security
         Registrar and/or Paying Agent for the series; and

                  (26) any other terms of the series  (which  terms shall not be
         inconsistent with the provisions of this Indenture).

                  All Securities of any one series and the coupons  appertaining
to any Bearer Securities of such series shall be substantially identical except,
in the case of  Registered  Securities,  as to  denominations  and except as may
otherwise be provided in or pursuant to the Board  Resolution  establishing  the
series (subject to Section 303) and set

                                       15

<PAGE>

forth in an Officers'  Certificate or in any indenture  supplemental hereto. All
Securities  of any one  series  need not be issued at the same time and,  unless
otherwise  provided,  a series  may be  reopened,  without  the  consent  of the
Holders, for issuances of additional Securities of such series.

                  If any of  the  terms  of the  Securities  of any  series  are
established by action taken pursuant to one or more Board Resolutions, a copy of
an appropriate  record of such action(s)  shall be certified by the Secretary or
an Assistant  Secretary of the Company and  delivered to the Trustee at or prior
to the  delivery of the  Officers'  Certificate  setting  forth the terms of the
Securities of such series.

                  SECTION  302.  Denominations.  The  Securities  of each series
shall be issuable in such denominations as shall be specified as contemplated by
Section 301. With respect to Securities of any series denominated in Dollars, in
the absence of any such  provisions,  the Registered  Securities of such series,
other than  Registered  Securities  issued in global  form  (which may be of any
denomination),  shall be issuable in  denominations  of $1,000 and any  integral
multiple thereof.

                  SECTION 303. Execution,  Authentication,  Delivery and Dating.
The Securities and any coupons  appertaining thereto shall be executed on behalf
of the Company by its  President or one of its Vice  Presidents,  under its seal
reproduced  thereon,  and  attested  by its  Secretary  or one of its  Assistant
Secretaries.  The  signature  of any of these  officers  on the  Securities  and
coupons may be manual or facsimile  signatures of the present or any future such
authorized  officer  and  may  be  imprinted  or  otherwise  reproduced  on  the
Securities.

                  Securities   or  coupons   bearing  the  manual  or  facsimile
signatures  of  individuals  who  were at any time the  proper  officers  of the
Company shall bind the Company,  notwithstanding that such individuals or any of
them have ceased to hold such offices prior to the  authentication  and delivery
of such  Securities or did not hold such offices at the date of such  Securities
or coupons.

                  At any time and from  time to time  after  the  execution  and
delivery of this  Indenture,  the Company may deliver  Securities of any series,
together with any coupon  appertaining  thereto,  executed by the Company to the
Trustee for authentication, together with a Company Order for the authentication
and delivery of such Securities,  and the Trustee in accordance with the Company
Order shall authenticate and deliver such Securities;  provided,  however, that,
in connection with its original issuance,  no Bearer Security shall be mailed or
otherwise  delivered to any location in the United States;  and provided further
that,  unless  otherwise  specified  with  respect to any  series of  Securities
pursuant to Section 301, a Bearer  Security may be delivered in connection  with
its  original  issuance  only if the  Person  entitled  to receive  such  Bearer
Security shall have furnished a certificate in the form set forth in Exhibit A-1
to this Indenture or such other  certificate as may be specified with respect to
any series of Securities  pursuant to Section 301, dated no earlier than 15 days
prior to the earlier of the date on which such Bearer  Security is delivered and
the date on which any temporary  Security  first becomes  exchangeable  for such
Bearer Security in accordance with the terms of such temporary Security and this
Indenture.  If any Security shall be  represented  by a permanent  global Bearer
Security,  then, for purposes of this Section and Section 304, the notation of a
beneficial  owner's interest therein upon original  issuance of such Security or
upon exchange of a portion of a temporary  global Security shall be deemed to be
delivery in connection  with its original  issuance of such  beneficial  owner's
interest in such permanent global Security.  Except as permitted by Section 306,
the Trustee shall not  authenticate  and deliver any Bearer  Security unless all
appurtenant  coupons for interest then matured have been detached and cancelled.
If all the  Securities of any series are not to be issued at one time and if the
Board  Resolution or supplemental  indenture  establishing  such series shall so
permit,  such Company Order may set forth  procedures  acceptable to the Trustee
for the issuance of such  Securities  and  determining  the terms of  particular
Securities of such series, such as interest rate or formula, maturity date, date
of issuance and date from which interest shall accrue.  In  authenticating  such
Securities,  and accepting the additional  responsibilities under this Indenture
in relation to such  Securities,  the Trustee shall be entitled to receive,  and
(subject to TIA Sections  315(a)  through  315(d))  shall be fully  protected in
relying upon,

                           (i)      an Opinion of Counsel stating that

                                       16

<PAGE>

                                    (a)     the form or forms of such Securities
                  and any coupons have been established in conformity with the 
                  provisions of this Indenture;

                                    (b)     the terms of such Securities and any
                  coupons have been established in conformity with the 
                  provisions of this Indenture; and

                                    (c)  such  Securities,   together  with  any
                  coupons  appertaining  thereto,  when completed by appropriate
                  insertions  and executed  and  delivered by the Company to the
                  Trustee for  authentication in accordance with this Indenture,
                  authenticated  and delivered by the Trustee in accordance with
                  this  Indenture  and  issued by the  Company in the manner and
                  subject  to  any  conditions  specified  in  such  Opinion  of
                  Counsel,  will constitute legal, valid and binding obligations
                  of the Company,  enforceable  in accordance  with their terms,
                  subject to applicable bankruptcy,  insolvency,  reorganization
                  and other similar laws of general applicability relating to or
                  affecting the enforcement of creditors'  rights  generally and
                  to general equitable principles; and

                           (ii)  an  Officers'   Certificate  stating  that  all
         conditions  precedent  provided for in this  Indenture  relating to the
         issuance of the  Securities  have been  complied  with and that, to the
         best of the knowledge of the signers of such  certificate,  no Event of
         Default with respect to any of the  Securities  shall have occurred and
         be continuing.

If such  form or terms  have  been so  established,  the  Trustee  shall  not be
required  to  authenticate  such  Securities  if the  issue  of such  Securities
pursuant  to this  Indenture  will  affect the  Trustee's  own  rights,  duties,
obligations  or immunities  under the Securities and this Indenture or otherwise
in a manner which is not reasonably acceptable to the Trustee.

                  Notwithstanding  the  provisions  of  Section  301  and of the
preceding paragraph, if all the Securities of any series are not to be issued at
one  time,  it shall  not be  necessary  to  deliver  an  Officers'  Certificate
otherwise  required pursuant to Section 301 or a Company Order, or an Opinion of
Counsel or an Officers' Certificate otherwise required pursuant to the preceding
paragraph  at the time of issuance of each  Security  of such  series,  but such
order,  opinion and certificates,  with appropriate  modifications to cover such
future  issuances,  shall be  delivered at or before the time of issuance of the
first Security of such series.

                  Each  Registered  Security  shall  be  dated  the  date of its
authentication  and each Bearer Security shall be dated as of the date specified
as contemplated by Section 301.

                  No Security or coupon  shall be entitled to any benefit  under
this Indenture or be valid or obligatory for any purpose unless there appears on
such  Security  or Security to which such coupon  appertains  a  certificate  of
authentication  substantially  in the form  provided for herein duly executed by
the Trustee by manual signature of an authorized  officer,  and such certificate
upon any Security shall be conclusive evidence, and the only evidence, that such
Security has been duly authenticated and delivered  hereunder and is entitled to
the benefits of this Indenture.  Notwithstanding the foregoing,  if any Security
shall have been authenticated and delivered  hereunder but never issued and sold
by the Company,  and the Company  shall deliver such Security to the Trustee for
cancellation as provided in Section 309 together with a written statement (which
need not comply with  Section 102 and need not be  accompanied  by an Opinion of
Counsel)  stating  that such  Security  has never  been  issued  and sold by the
Company,  for all purposes of this Indenture such Security shall be deemed never
to have been  authenticated and delivered  hereunder and shall never be entitled
to the benefits of this Indenture.

                  SECTION 304. Temporary Securities. (a) Pending the preparation
of  definitive  Securities  of any series,  the Company  may  execute,  and upon
Company Order the Trustee shall authenticate and deliver,  temporary  Securities
which  are  printed,  lithographed,   typewritten,   mimeographed  or  otherwise
produced,  in any  authorized  denomination,  substantially  of the tenor of the
definitive  Securities in lieu of which they are issued, in registered form, or,
if authorized,  in bearer form with one or more coupons or without coupons,  and
with such appropriate

                                       17
<PAGE>

insertions,  omissions,  substitutions  and  other  variations  as the  officers
executing  such  Securities may determine,  as  conclusively  evidenced by their
execution of such  Securities.  In the case of  Securities  of any series,  such
temporary Securities may be in global form.

                  Except in the case of  temporary  Securities  in  global  form
(which  shall be  exchanged in  accordance  with Section  304(b) or as otherwise
provided in or pursuant to a Board Resolution),  if temporary  Securities of any
series are issued,  the Company will cause definitive  Securities of that series
to be prepared without  unreasonable  delay. After the preparation of definitive
Securities  of such series,  the  temporary  Securities  of such series shall be
exchangeable  for  definitive  Securities  of such series upon  surrender of the
temporary  Securities of such series at the office or agency of the Company in a
Place of Payment for that series,  without charge to the Holder.  Upon surrender
for  cancellation  of any  one  or  more  temporary  Securities  of  any  series
(accompanied by any non-matured coupons appertaining thereto), the Company shall
execute and the Trustee shall  authenticate  and deliver in exchange  therefor a
like principal amount of definitive  Securities of the same series of authorized
denominations;  provided,  however,  that no definitive Bearer Security shall be
delivered in exchange for a temporary Registered Security;  and provided further
that a definitive Bearer Security shall be delivered in exchange for a temporary
Bearer Security only in compliance with the conditions set forth in Section 303.
Until so exchanged, the temporary Securities of any series shall in all respects
be entitled to the same benefits under this  Indenture as definitive  Securities
of such series.

                  (b)  Unless  otherwise  provided  in or  pursuant  to a  Board
Resolution,   this  Section  304(b)  shall  govern  the  exchange  of  temporary
Securities  issued in global form other than through the  facilities  of DTC. If
any such temporary Security is issued in global form, then such temporary global
Security shall,  unless otherwise  provided therein,  be delivered to the London
office of a depositary or common depositary (the "Common  Depositary"),  for the
benefit of Euroclear  and CEDEL,  for credit to the  respective  accounts of the
beneficial  owners of such  Securities  (or to such other  accounts  as they may
direct).

                  Without  unnecessary delay but in any event not later than the
date  specified in, or determined  pursuant to the terms of, any such  temporary
global Security (the "Exchange Date"),  the Company shall deliver to the Trustee
definitive  Securities,  in aggregate  principal  amount equal to the  principal
amount of such temporary global Security,  executed by the Company.  On or after
the Exchange Date,  such temporary  global  Security shall be surrendered by the
Common Depositary to the Trustee, as the Company's agent for such purpose, to be
exchanged,  in whole or from  time to time in part,  for  definitive  Securities
without charge, and the Trustee shall authenticate and deliver,  in exchange for
each portion of such temporary  global  Security,  an equal aggregate  principal
amount of definitive  Securities of the same series of authorized  denominations
and of like  tenor  as the  portion  of such  temporary  global  Security  to be
exchanged.  The  definitive  Securities to be delivered in exchange for any such
temporary global Security shall be in bearer form,  registered  form,  permanent
global  bearer form or permanent  global  registered  form,  or any  combination
thereof,  as specified as  contemplated  by Section 301, and, if any combination
thereof is so specified, as requested by the beneficial owner thereof; provided,
however,  that,  unless  otherwise  specified in such temporary global Security,
upon such presentation by the Common Depositary,  such temporary global Security
is accompanied by a certificate dated the Exchange Date or a subsequent date and
signed by Euroclear as to the portion of such temporary global Security held for
its account then to be exchanged and a certificate  dated the Exchange Date or a
subsequent  date and signed by CEDEL as to the portion of such temporary  global
Security held for its account then to be  exchanged,  each in the form set forth
in Exhibit  A-2 to this  Indenture  or in such other form as may be  established
pursuant to Section 301; and provided further that definitive  Bearer Securities
shall be delivered in exchange for a portion of a temporary global Security only
in compliance with the requirements of Section 303.

                  Unless otherwise  specified in such temporary global Security,
the  interest of a  beneficial  owner of  Securities  of a series in a temporary
global Security shall be exchanged for definitive  Securities of the same series
and of like tenor following the Exchange Date when the account holder  instructs
Euroclear or CEDEL,  as the case may be, to request such  exchange on his behalf
and  delivers to Euroclear or CEDEL,  as the case may be, a  certificate  in the
form set forth in Exhibit A-1 to this  Indenture  (or in such other forms as may
be established  pursuant to Section 301), dated no earlier than 15 days prior to
the Exchange Date, copies of which certificate shall be available

                                       18
<PAGE>

from the offices of Euroclear and CEDEL, the Trustee,  any Authenticating  Agent
appointed for such series of Securities and each Paying Agent.  Unless otherwise
specified in such  temporary  global  Security,  any such exchange shall be made
free of  charge to the  beneficial  owners of such  temporary  global  Security,
except  that a Person  receiving  definitive  Securities  must  bear the cost of
insurance,  postage,  transportation  and the  like  unless  such  Person  takes
delivery of such definitive  Securities in person at the offices of Euroclear or
CEDEL.  Definitive Securities in bearer form to be delivered in exchange for any
portion of a temporary  global  Security  shall be  delivered  only  outside the
United States.

                  Until exchanged in full as hereinabove provided, the temporary
Securities  of any series shall in all respects be entitled to the same benefits
under this  Indenture as  definitive  Securities  of the same series and of like
tenor  authenticated  and delivered  hereunder,  except that,  unless  otherwise
specified as contemplated by Section 301, interest payable on a temporary global
Security on an Interest  Payment Date for  Securities  of such series  occurring
prior to the applicable Exchange Date shall be payable to Euroclear and CEDEL on
such  Interest  Payment Date upon delivery by Euroclear and CEDEL to the Trustee
of a certificate  or  certificates  in the form set forth in Exhibit A-2 to this
Indenture  (or in such other  forms as may be  established  pursuant  to Section
301), for credit without further interest on or after such Interest Payment Date
to the  respective  accounts  of persons who are the  beneficial  owners of such
temporary  global  Security  on such  Interest  Payment  Date and who have  each
delivered  to  Euroclear or CEDEL,  as the case may be, a  certificate  dated no
earlier than 15 days prior to the Interest  Payment Date occurring prior to such
Exchange Date in the form set forth as Exhibit A-1 to this Indenture (or in such
other  forms as may be  established  pursuant to Section  301).  Notwithstanding
anything to the contrary herein contained,  the certifications  made pursuant to
this paragraph shall satisfy the certification requirements of the preceding two
paragraphs of this Section 304 (b) and of the third  paragraph of Section 303 of
this Indenture and the interests of the Persons who are the beneficial owners of
a temporary  global Security with respect to which such  certification  was made
will be exchanged for definitive Securities of the same series and of like tenor
on the Exchange Date or the date of  certification if such date occurs after the
Exchange Date, without further act or deed by such beneficial owners.  Except as
otherwise provided in this paragraph, no payments of principal or interest owing
with respect to a beneficial  interest in a temporary  global  Security  will be
made unless and until such interest in such temporary global Security shall have
been  exchanged  for an  interest  in a  definitive  Security.  Any  interest so
received  by  Euroclear  and  CEDEL  and not paid as  herein  provided  shall be
returned to the Trustee prior to the expiration of two years after such Interest
Payment Date in order to be repaid to the Company.

                  SECTION  305.  Registration,   Registration  of  Transfer  and
Exchange.  The Company shall cause to be kept at the  Corporate  Trust Office of
the  Trustee or in any  office or agency of the  Company in a Place of Payment a
register for each series of Securities (the registers  maintained in such office
or in any such  office or  agency of the  Company  in a Place of  Payment  being
herein sometimes referred to collectively as the "Security  Register") in which,
subject to such  reasonable  regulations as it may prescribe,  the Company shall
provide for the  registration  of  Registered  Securities  and of  transfers  of
Registered  Securities.  The Security  Register  shall be in written form or any
other form  capable of being  converted  into  written  form within a reasonable
time. The Trustee,  at its Corporate Trust Office, is hereby initially appointed
"Security  Registrar" for the purpose of registering  Registered  Securities and
transfers of Registered Securities on such Security Register as herein provided.
In the event that the Trustee  shall cease to be  Security  Registrar,  it shall
have the right to examine the Security Register at all reasonable times.

                  Subject to the  provisions of this Section 305, upon surrender
for  registration  of transfer of any  Registered  Security of any series at any
office or agency of the  Company  in a Place of  Payment  for that  series,  the
Company shall execute,  and the Trustee shall  authenticate and deliver,  in the
name of the  designated  transferee or  transferees,  one or more new Registered
Securities of the same series,  of any  authorized  denominations  and of a like
aggregate principal amount, bearing a number not contemporaneously  outstanding,
and containing identical terms and provisions.

                  Subject to the  provisions  of this Section 305, at the option
of the Holder,  Registered  Securities  of any series may be exchanged for other
Registered Securities of the same series, of any authorized denomination or

                                       19
<PAGE>

denominations  and of a like aggregate  principal amount,  containing  identical
terms  and  provisions,  upon  surrender  of  the  Registered  Securities  to be
exchanged at any such office or agency.  Whenever any such Registered Securities
are so  surrendered  for exchange,  the Company shall  execute,  and the Trustee
shall  authenticate  and deliver,  the  Registered  Securities  which the Holder
making the  exchange is entitled to receive.  Unless  otherwise  specified  with
respect to any series of  Securities  as  contemplated  by Section  301,  Bearer
Securities may not be issued in exchange for Registered Securities.

                  If (but only if) permitted by the applicable  Board Resolution
and (subject to Section 303) set forth in the applicable Officers'  Certificate,
or in any indenture  supplemental  hereto,  delivered as contemplated by Section
301,  at the  option of the  Holder,  Bearer  Securities  of any  series  may be
exchanged  for  Registered  Securities  of the  same  series  of any  authorized
denominations and of a like aggregate principal amount and tenor, upon surrender
of the Bearer Securities to be exchanged at any such office or agency,  with all
unmatured  coupons and all matured coupons in default thereto  appertaining.  If
the Holder of a Bearer  Security is unable to produce any such unmatured  coupon
or coupons or matured coupon or coupons in default,  any such permitted exchange
may be effected if the Bearer  Securities  are  accompanied  by payment in funds
acceptable  to the Company in an amount equal to the face amount of such missing
coupon or coupons,  or the  surrender of such  missing  coupon or coupons may be
waived  by the  Company  and the  Trustee  if there is  furnished  to them  such
security  or  indemnity  as they may require to save each of them and any Paying
Agent harmless. If thereafter the Holder of such Security shall surrender to any
Paying  Agent any such missing  coupon in respect of which such a payment  shall
have been made,  such  Holder  shall be  entitled  to receive the amount of such
payment; provided,  however, that, except as otherwise provided in Section 1002,
interest  represented  by coupons  shall be payable only upon  presentation  and
surrender  of those  coupons at an office or agency  located  outside the United
States.  Notwithstanding the foregoing,  in case a Bearer Security of any series
is  surrendered  at any such  office  or agency in a  permitted  exchange  for a
Registered  Security  of the same  series  and like  tenor  after  the  close of
business at such office or agency on (i) any Regular  Record Date and before the
opening of business at such office or agency on the  relevant  Interest  Payment
Date, or (ii) any Special Record Date and before the opening of business at such
office or agency on the related proposed date for payment of Defaulted Interest,
such Bearer  Security shall be surrendered  without the coupon  relating to such
Interest  Payment  Date or proposed  date for  payment,  as the case may be, and
interest or Defaulted Interest,  as the case may be, will not be payable on such
Interest  Payment  Date or  proposed  date for  payment,  as the case may be, in
respect of the Registered  Security issued in exchange for such Bearer Security,
but will be payable  only to the Holder of such  coupon  when due in  accordance
with the  provisions of this  Indenture.  Whenever any Bearer  Securities are so
surrendered  for  exchange,  the Company  shall  execute,  and the Trustee shall
authenticate and deliver, the Securities which the Holder making the exchange is
entitled to receive.

                  Notwithstanding  the foregoing,  except as otherwise specified
as  contemplated  by  Section  301,  any  permanent  global  Security  shall  be
exchangeable  only as  provided in this  paragraph.  If the  depositary  for any
permanent global Security is DTC, then, unless the terms of such global Security
expressly  permit such global  Security to be  exchanged in whole or in part for
definitive Securities, a global Security may be transferred, in whole but not in
part, only to a nominee of DTC, or by a nominee of DTC to DTC, or to a successor
to DTC for such  global  Security  selected  or  approved by the Company or to a
nominee of such  successor  to DTC. If at any time DTC notifies the Company that
it is unwilling or unable to continue as depositary  for the  applicable  global
Security  or  Securities  or if at any time DTC ceases to be a  clearing  agency
registered under the Securities Exchange Act of 1934, as amended, if so required
by  applicable  law  or  regulation,  the  Company  shall  appoint  a  successor
depositary  with  respect  to  such  global  Security  or  Securities.  If (x) a
successor  depositary for such global Security or Securities is not appointed by
the  Company  within 90 days after the Company  receives  such notice or becomes
aware of such unwillingness, inability or ineligibility, (y) an Event of Default
has occurred and is continuing and the beneficial owners representing a majority
in principal amount of the applicable  series of Securities  represented by such
global Security or Securities  advise DTC to cease acting as depositary for such
global  Security  or  Securities  or (z) the  Company,  in its sole  discretion,
determines at any time that all  Outstanding  Securities (but not less than all)
of any series  issued or issuable  in the form of one or more global  Securities
shall no longer be represented by such global  Security or Securities,  then the
Company  shall  execute,   and  the  Trustee  shall  authenticate  and  deliver,
definitive  Securities of like series,  rank, tenor and terms in definitive form
in an aggregate principal amount equal to the

                                       20
<PAGE>

principal amount of such global Security or Securities.  If any beneficial owner
of an interest in a permanent global Security is otherwise  entitled to exchange
such  interest  for  Securities  of such series and of like tenor and  principal
amount of another authorized form and denomination, as specified as contemplated
by Section 301 and provided that any applicable notice provided in the permanent
global Security shall have been given, then without unnecessary delay but in any
event  no  later  than  the  earliest  date on  which  such  interest  may be so
exchanged,  the Company shall execute,  and the Trustee shall  authenticate  and
deliver,  definitive  Securities  in  aggregate  principal  amount  equal to the
principal  amount of such beneficial  owner's  interest in such permanent global
Security.  On or after  the  earliest  date on which  such  interests  may be so
exchanged,  such permanent  global Security shall be surrendered for exchange by
DTC or such other  depositary  as shall be specified  in the Company  Order with
respect  thereto  to the  Trustee,  as the  Company's  agent  for such  purpose;
provided, however, that no such exchanges may occur during a period beginning at
the  opening of  business  15 days  before any  selection  of  Securities  to be
redeemed  and ending on the relevant  Redemption  Date if the Security for which
exchange is requested may be among those selected for  redemption;  and provided
further  that no Bearer  Security  delivered  in  exchange  for a  portion  of a
permanent global Security shall be mailed or otherwise delivered to any location
in the United  States.  If a  Registered  Security is issued in exchange for any
portion of a permanent global Security after the close of business at the office
or agency where such exchange  occurs on (i) any Regular  Record Date and before
the  opening  of  business  at such  office or agency on the  relevant  Interest
Payment Date, or (ii) any Special Record Date and before the opening of business
at such office or agency on the related  proposed  date for payment of Defaulted
Interest,  interest  or  Defaulted  Interest,  as the case  may be,  will not be
payable on such Interest Payment Date or proposed date for payment,  as the case
may be, in  respect  of such  Registered  Security,  but will be payable on such
Interest Payment Date or proposed date for payment,  as the case may be, only to
the Person to whom interest in respect of such portion or such permanent  global
Security is payable in accordance with the provisions of this Indenture.

                  All  Securities  issued upon any  registration  of transfer or
exchange of Securities shall be the valid obligations of the Company, evidencing
the same debt,  and entitled to the same benefits under this  Indenture,  as the
Securities surrendered upon such registration of transfer or exchange.

                  Every  Registered   Security   presented  or  surrendered  for
registration of transfer or for exchange or redemption  shall (if so required by
the Company or the Security Registrar) be duly endorsed,  or be accompanied by a
written  instrument  of  transfer  in form  satisfactory  to the Company and the
Security  Registrar,  duly  executed by the Holder  thereof or his attorney duly
authorized in writing.

                  No  service  charge  shall  be made  for any  registration  of
transfer or exchange of Securities, but the Company may require payment of a sum
sufficient to cover any tax or other governmental  charge that may be imposed in
connection with any  registration  of transfer or exchange of Securities,  other
than  exchanges  pursuant to Section 304,  906,  1107 or 1305 not  involving any
transfer.

                  The  Company  or the  Trustee,  as  applicable,  shall  not be
required (i) to issue, register the transfer of or exchange any Security if such
Security may be among those selected for redemption during a period beginning at
the  opening of  business  15 days  before  selection  of the  Securities  to be
redeemed  under  Section 1103 and ending at the close of business on (A) if such
Securities are issuable only as Registered Securities, the day of the mailing of
the relevant  notice of redemption  and (B) if such  Securities  are issuable as
Bearer  Securities,  the day of the first  publication of the relevant notice of
redemption or, if such Securities are also issuable as Registered Securities and
there is no publication,  the mailing of the relevant  notice of redemption,  or
(ii) to register the transfer of or exchange any Registered Security so selected
for  redemption  in  whole  or in part,  except,  in the case of any  Registered
Security to be redeemed in part,  the  portion  thereof not to be  redeemed,  or
(iii) to exchange  any Bearer  Security so selected for  redemption  except that
such a Bearer Security may be exchanged for a Registered Security of that series
and  of  like  tenor;   provided  that  such   Registered   Security   shall  be
simultaneously  surrendered  for  redemption,  or (iv) to  issue,  register  the
transfer of or exchange any Security which has been surrendered for repayment at
the option of the Holder, except that portion, if any, of such Security which is
not to be so repaid.

                                       21
<PAGE>

                  SECTION 306. Mutilated, Destroyed, Lost and Stolen Securities.
If any mutilated Security or a Security with a mutilated coupon  appertaining to
it is surrendered to the Trustee or the Company, together with, in proper cases,
such  security or  indemnity as may be required by the Company or the Trustee to
save each of them or any agent of either of them  harmless,  the  Company  shall
execute and the Trustee shall  authenticate  and deliver in exchange  therefor a
new Security of the same series and principal amount, containing identical terms
and  provisions  and bearing a number not  contemporaneously  outstanding,  with
coupons  corresponding to the coupons,  if any,  appertaining to the surrendered
Security.

                  If there shall be  delivered to the Company and to the Trustee
(i)  evidence to their  satisfaction  of the  destruction,  loss or theft of any
Security or coupon,  and (ii) such  security or  indemnity as may be required by
them to save each of them and any agent of either of them harmless, then, in the
absence of written  notice to the Company or the Trustee  that such  Security or
coupon has been acquired by a bona fide purchaser, the Company shall execute and
upon its request the Trustee shall authenticate and deliver, in lieu of any such
destroyed,  lost or stolen  Security or in exchange  for the Security to which a
destroyed,  lost or stolen coupon  appertains (with all appurtenant  coupons not
destroyed,  lost or stolen),  a new  Security  of the same series and  principal
amount,  containing  identical  terms and  provisions  and  bearing a number not
contemporaneously  outstanding,  with coupons  corresponding to the coupons,  if
any, appertaining to such destroyed,  lost or stolen Security or to the Security
to which such destroyed, lost or stolen coupon appertains.

                  Notwithstanding the provisions of the previous two paragraphs,
in case any such  mutilated,  destroyed,  lost or stolen  Security or coupon has
become or is about to become due and payable, the Company in its discretion may,
instead of issuing a new Security, with coupons corresponding to the coupons, if
any, appertaining to such destroyed,  lost or stolen Security or to the Security
to which such destroyed, lost or stolen coupon appertains,  pay such Security or
coupon;  provided,  however, that payment of principal of (and premium, if any),
any interest on and any  Additional  Amounts with respect to, Bearer  Securities
shall,  except as  otherwise  provided in Section  1002,  be payable  only at an
office or agency  located  outside  the  United  States  and,  unless  otherwise
specified as  contemplated  by Section  301,  any interest on Bearer  Securities
shall  be  payable  only  upon   presentation   and  surrender  of  the  coupons
appertaining thereto.

                  Upon the issuance of any new Security under this Section,  the
Company may require  the payment of a sum  sufficient  to cover any tax or other
governmental  charge  that may be  imposed  in  relation  thereto  and any other
expenses (including the fees and expenses of the Trustee) connected therewith.

                  Every new  Security  of any series with its  coupons,  if any,
issued  pursuant  to  this  Section  in lieu of any  destroyed,  lost or  stolen
Security,  or in exchange  for a Security to which a  destroyed,  lost or stolen
coupon  appertains,   shall  constitute  an  original   additional   contractual
obligation of the Company, whether or not the destroyed, lost or stolen Security
and its coupons, if any, or the destroyed, lost or stolen coupon shall be at any
time  enforceable  by anyone,  and shall be entitled to all the benefits of this
Indenture equally and proportionately  with any and all other Securities of that
series and their coupons, if any, duly issued hereunder.

                  The  provisions  of  this  Section  are  exclusive  and  shall
preclude (to the extent  lawful) all other  rights and remedies  with respect to
the replacement or payment of mutilated, destroyed, lost or stolen Securities or
coupons.

                  SECTION 307. Payment of Interest;  Interest Rights  Preserved.
Except  as  otherwise  specified  with  respect  to a series  of  Securities  in
accordance  with the  provisions  of Section  301,  interest  on any  Registered
Security that is payable,  and is  punctually  paid or duly provided for, on any
Interest  Payment  Date shall be paid to the Person in whose name that  Security
(or one or more  Predecessor  Securities) is registered at the close of business
on the  Regular  Record  Date for such  interest  at the office or agency of the
Company maintained for such purpose pursuant to Section 1002; provided, however,
that  each  installment  of  interest  on  any  Registered  Security  may at the
Company's option be paid by (i) mailing a check for such interest, payable to or
upon the written order of the Person entitled  thereto  pursuant to Section 308,
to the  address of such  Person as it appears on the  Security  Register or (ii)
transfer to an account maintained by the payee located inside the United States.

                                       22
<PAGE>

                  Unless otherwise  provided as contemplated by Section 301 with
respect to the Securities of any series, payment of interest may be made, in the
case of a Bearer  Security,  by transfer to an account  maintained  by the payee
with a bank located outside the United States.

                  Unless  otherwise  provided as  contemplated  by Section  301,
every permanent  global Security will provide that interest,  if any, payable on
any Interest  Payment Date will be paid to DTC,  Euroclear  and/or CEDEL, as the
case may be, with respect to that portion of such permanent global Security held
for its account by Cede & Co. or the Common Depositary,  as the case may be, for
the purpose of  permitting  such party to credit the interest  received by it in
respect of such  permanent  global  Security to the  accounts of the  beneficial
owners thereof.

                  In case a Bearer  Security  of any  series is  surrendered  in
exchange  for a  Registered  Security of such series after the close of business
(at an office or agency in a Place of Payment  for such  series) on any  Regular
Record Date and before the opening of business (at such office or agency) on the
next succeeding Interest Payment Date, such Bearer Security shall be surrendered
without the coupon relating to such Interest  Payment Date and interest will not
be payable on such Interest  Payment Date in respect of the Registered  Security
issued in exchange  for such Bearer  Security,  but will be payable  only to the
Holder  of such  coupon  when  due in  accordance  with the  provisions  of this
Indenture.

                  Except as  otherwise  specified  with  respect  to a series of
Securities in accordance with the provisions of Section 301, any interest on any
Registered Security of any series that is payable, but is not punctually paid or
duly  provided  for, on any  Interest  Payment Date  (herein  called  "Defaulted
Interest") shall forthwith cease to be payable to the registered  Holder thereof
on the relevant  Regular  Record Date by virtue of having been such Holder,  and
such  Defaulted  Interest  may be paid by the  Company,  at its election in each
case, as provided in clause (1) or (2) below:

                           (1) The  Company  may  elect to make  payment  of any
         Defaulted  Interest  to the  Persons  in  whose  names  the  Registered
         Securities of such series (or their respective Predecessor  Securities)
         are  registered  at the close of business on a Special  Record Date for
         the  payment of such  Defaulted  Interest,  which shall be fixed in the
         following  manner.  The Company  shall notify the Trustee in writing of
         the amount of Defaulted Interest proposed to be paid on each Registered
         Security of such  series and the date of the  proposed  payment  (which
         shall not be less than 20 days after  such  notice is  received  by the
         Trustee),  and at the same  time the  Company  shall  deposit  with the
         Trustee an amount of money in the currency or currencies, currency unit
         or units or composite currency or currencies in which the Securities of
         such  series are payable  (except as  otherwise  specified  pursuant to
         Section 301 for the  Securities  of such series) equal to the aggregate
         amount  proposed  to be paid in respect of such  Defaulted  Interest or
         shall make arrangements satisfactory to the Trustee for such deposit on
         or prior to the date of the proposed payment, such money when deposited
         to be held in trust for the  benefit of the  Persons  entitled  to such
         Defaulted  Interest as in this clause  provided.  Thereupon the Trustee
         shall fix a  Special  Record  Date for the  payment  of such  Defaulted
         Interest which shall not be more than 15 days and not less than 10 days
         prior to the date of the  proposed  payment  and not less  than 10 days
         after the receipt by the Trustee of the notice of the proposed payment.
         The Trustee shall  promptly  notify the Company of such Special  Record
         Date and,  in the name and at the expense of the  Company,  shall cause
         notice of the  proposed  payment  of such  Defaulted  Interest  and the
         Special Record Date therefor to be mailed, first-class postage prepaid,
         to each Holder of  Registered  Securities of such series at his address
         as it appears in the  Security  Register not less than 10 days prior to
         such Special  Record Date. The Trustee may, in its  discretion,  in the
         name and at the expense of the  Company,  cause a similar  notice to be
         published  at least once in an  Authorized  Newspaper  in each Place of
         Payment,  but such publications  shall not be a condition  precedent to
         the  establishment of such Special Record Date.  Notice of the proposed
         payment of such Defaulted Interest and the Special Record Date therefor
         having been mailed as aforesaid,  such Defaulted Interest shall be paid
         to the Persons in whose names the Registered  Securities of such series
         (or their  respective  Predecessor  Securities)  are  registered at the
         close of  business on such  Special  Record Date and shall no longer be
         payable pursuant to the following clause (2). In case a Bearer Security
         of any series is surrendered for transfer or exchange at the office or

                                       23

<PAGE>



         agency  in a Place  of  Payment  for such  series  after  the  close of
         business at such office or agency on any Special Record Date and before
         the  opening  of  business  at such  office or  agency  on the  related
         proposed date for payment of Defaulted  Interest,  such Bearer Security
         shall be surrendered  without the coupon relating to such proposed date
         of payment and Defaulted  Interest will not be payable on such proposed
         date of  payment  in  respect  of the  Registered  Security  issued  in
         exchange  for such  Bearer  Security,  but will be payable  only to the
         Holder of such coupon when due in  accordance  with the  provisions  of
         this Indenture.

                           (2) The  Company  may make  payment of any  Defaulted
         Interest on the Registered Securities of any series in any other lawful
         manner  not  inconsistent  with  the  requirements  of  any  securities
         exchange on which such  Securities may be listed,  and upon such notice
         as may be required by such  exchange,  if,  after  notice  given by the
         Company to the Trustee of the proposed payment pursuant to this clause,
         such manner of payment shall be deemed practicable by the Trustee.

                  Subject  to the  foregoing  provisions  of  this  Section  and
Section 305, each Security  delivered under this Indenture upon  registration of
transfer of or in exchange for or in lieu of any other  Security shall carry the
rights to interest accrued and unpaid, and to accrue, which were carried by such
other Security.

                  SECTION 308.  Persons Deemed Owners.  Prior to due presentment
of a Registered Security for registration of transfer,  the Company, the Trustee
and any agent of the  Company or the  Trustee may treat the Person in whose name
such  Registered  Security is  registered  as the owner of such Security for the
purpose of receiving payment of principal of (and premium, if any), and (subject
to Sections 305 and 307) interest on, such Registered Security and for all other
purposes  whatsoever,  whether or not such Registered  Security is overdue,  and
neither  the  Company,  the  Trustee nor any agent of the Company or the Trustee
shall be affected by notice to the contrary.

                  Title to any  Bearer  Security  and any  coupons  appertaining
thereto  shall pass by delivery.  The Company,  the Trustee and any agent of the
Company  or the  Trustee  may treat the Holder of any  Bearer  Security  and the
Holder of any coupon as the  absolute  owner of such  Security or coupon for the
purpose of  receiving  payment  thereof or on account  thereof and for all other
purposes  whatsoever,  whether or not such  Security or coupon is  overdue,  and
neither  the  Company,  the  Trustee nor any agent of the Company or the Trustee
shall be affected by notice to the contrary.

                  None of the  Company,  the  Trustee,  any Paying  Agent or the
Security  Registrar will have any  responsibility or liability for any aspect of
the  records  relating to or payments  made on account of  beneficial  ownership
interests  of a  Security  in global  form or for  maintaining,  supervising  or
reviewing any records relating to such beneficial ownership interests.

                  Notwithstanding  the  foregoing,  with  respect  to any global
Security, nothing herein shall prevent the Company, the Trustee, or any agent of
the Company or the  Trustee,  from giving  effect to any written  certification,
proxy or other  authorization  furnished by any  depositary,  as a Holder,  with
respect to such global Security or impair, as between such depositary and owners
of  beneficial  interests in such global  Security,  the  operation of customary
practices  governing  the  exercise  of the  rights of such  depositary  (or its
nominee) as Holder of such global Security.

                  SECTION  309.   Cancellation.   All   Securities  and  coupons
surrendered  for  payment,  redemption,  repayment  at the option of the Holder,
registration  of transfer or  exchange  or for credit  against any sinking  fund
payment shall, if surrendered to any Person other than the Trustee, be delivered
to the Trustee,  and any such  Securities and coupons and Securities and coupons
surrendered  directly  to the  Trustee  for any such  purpose  shall be promptly
cancelled  by it.  The  Company  may at any  time  deliver  to the  Trustee  for
cancellation any Securities  previously  authenticated  and delivered  hereunder
which the Company may have acquired in any manner whatsoever, and may deliver to
the  Trustee  (or  to  any  other  Person  for  delivery  to  the  Trustee)  for
cancellation any Securities previously authenticated hereunder which the Company
has not issued and sold,  and all  Securities  so  delivered  shall be  promptly
cancelled by the Trustee. If the Company shall so acquire any of the Securities,
however, such

                                       24
<PAGE>

acquisition   shall  not  operate  as  a  redemption  or   satisfaction  of  the
indebtedness  represented  by such  Securities  unless  and  until  the same are
surrendered   to  the  Trustee  for   cancellation.   No  Securities   shall  be
authenticated in lieu of or in exchange for any Securities cancelled as provided
in this  Section,  except as expressly  permitted by this  Indenture.  Cancelled
Securities and coupons held by the Trustee shall be destroyed by the Trustee and
the Trustee  shall  deliver a certificate  of such  destruction  to the Company,
unless by a Company Order the Company directs their return to it.

                  SECTION  310.  Computation  of  Interest.  Except as otherwise
specified  as  contemplated  by Section 301 with  respect to  Securities  of any
series, interest on the Securities of each series shall be computed on the basis
of a 360-day year consisting of twelve 30-day months.


                                  ARTICLE FOUR

                           SATISFACTION AND DISCHARGE

                  SECTION 401.  Satisfaction  and Discharge of  Indenture.  This
Indenture  shall upon Company Request cease to be of further effect with respect
to any series of Securities  specified in such Company Request (except as to any
surviving  rights of  registration of transfer or exchange of Securities of such
series  herein  expressly  provided  for and any  right  to  receive  Additional
Amounts,  as provided  in Section  1007),  and the  Trustee,  upon  receipt of a
Company  Order,  and at  the  expense  of  the  Company,  shall  execute  proper
instruments  acknowledging  satisfaction  and discharge of this  Indenture as to
such series when

                           (1)  either

                                    (A)   all    Securities   of   such   series
                  theretofore  authenticated  and delivered and all coupons,  if
                  any, appertaining thereto (other than (i) coupons appertaining
                  to Bearer  Securities  surrendered for exchange for Registered
                  Securities and maturing after such exchange,  whose  surrender
                  is not required or has been waived as provided in Section 305,
                  (ii)  Securities  and coupons of such  series  which have been
                  destroyed, lost or stolen and which have been replaced or paid
                  as provided in Section  306,  (iii)  coupons  appertaining  to
                  Securities  called  for  redemption  and  maturing  after  the
                  relevant  Redemption  Date, whose surrender has been waived as
                  provided in Section 1106,  and (iv)  Securities and coupons of
                  such  series  for whose  payment  money has  theretofore  been
                  deposited  in  trust  or  segregated  and held in trust by the
                  Company and  thereafter  repaid to the  Company or  discharged
                  from such  trust,  as  provided  in  Section  1003)  have been
                  delivered to the Trustee for cancellation; or

                                    (B) all  Securities  of such  series and, in
                  the  case  of (i) or  (ii)  below,  any  coupons  appertaining
                  thereto,   not  theretofore   delivered  to  the  Trustee  for
                  cancellation

                                          (i)      have become due and payable, 
                                                   or

                                          (ii)     will become due and payable 
                                                   at their Stated Maturity 
                                                   within one year, or

                                          (iii)    if redeemable at the option
                                                   of the  Company,  are to be
                                                   called    for    redemption
                                                   within   one   year   under
                                                   arrangements   satisfactory
                                                   to  the   Trustee  for  the
                                                   giving    of    notice   of
                                                   redemption  by the  Trustee
                                                   in  the  name,  and  at the
                                                   expense, of the Company,

                  and the Company,  in the case of (i), (ii) or (iii) above, has
                  irrevocably  deposited  or  caused  to be  deposited  with the
                  Trustee  as funds in trust for such  purpose  an amount in the
                  currency or
                                       25
<PAGE>

                  currencies,  currency  unit or units or composite  currency or
                  currencies in which the Securities of such series are payable,
                  sufficient  to pay and discharge  the entire  indebtedness  on
                  such Securities and such coupons not theretofore  delivered to
                  the Trustee for cancellation,  for principal (and premium,  if
                  any) and  interest,  and any  Additional  Amounts with respect
                  thereto,  to  the  date  of  such  deposit  (in  the  case  of
                  Securities which have become due and payable) or to the Stated
                  Maturity or Redemption Date, as the case may be;

                           (2)  the Company has paid or caused to be paid all 
         other sums payable hereunder by the Company; and

                           (3) the  Company  has  delivered  to the  Trustee  an
         Officers'  Certificate and an Opinion of Counsel, each stating that all
         conditions  precedent  herein provided for relating to the satisfaction
         and  discharge of this  Indenture as to such series have been  complied
         with.

The obligations of the Company to the Trustee and any predecessor  Trustee under
Section 606, the  obligations of the Company to any  Authenticating  Agent under
Section 611 and, if money shall have been deposited with and held by the Trustee
pursuant to subclause (B) of clause (1) of this Section,  the obligations of the
Trustee under  Section 402 and the last  paragraph of Section 1003 shall survive
the satisfaction and discharge of this Indenture.

                  SECTION  402.  Application  of  Trust  Funds.  Subject  to the
provisions of the last paragraph of Section 1003,  all money  deposited with the
Trustee  pursuant  to Section  401 shall be held in trust and  applied by it, in
accordance  with  the  provisions  of  the  Securities,  the  coupons  and  this
Indenture,  to  the  payment,  either  directly  or  through  any  Paying  Agent
(including  the  Company  acting as its own  Paying  Agent) as the  Trustee  may
determine,  to the Persons entitled thereto,  of the principal (and premium,  if
any), and any interest and  Additional  Amounts for whose payment such money has
been  deposited  with or  received  by the  Trustee,  but such money need not be
segregated from other funds except to the extent required by law.


                                  ARTICLE FIVE

                                    REMEDIES

                  SECTION 501. Events of Default.  "Event of Default",  wherever
used herein with respect to any particular  series of Securities,  means any one
of the  following  events  (whatever  the reason  for such Event of Default  and
whether or not it shall be voluntary or  involuntary or be effected by operation
of law or pursuant to any  judgment,  decree or order of any court or any order,
rule or regulation of any administrative or governmental body):

                  (1)  default  in the  payment  of  any  interest  upon  or any
         Additional Amounts payable in respect of any Security of that series or
         of any coupon  appertaining  thereto,  when such  interest,  Additional
         Amounts or coupon  becomes due and  payable,  and  continuance  of such
         default for a period of 30 days; or

                  (2) default in the payment of the principal of (or premium, if
         any, on) any Security of that series when it becomes due and payable at
         its Maturity; or

                  (3) default in the deposit of any sinking fund  payment,  when
         and as due by the terms of any Security of that series; or

                  (4) default in the  performance of, or breach of, any covenant
         of the  Company in this  Indenture  (other than a covenant a default in
         whose  performance  or  whose  breach  is  elsewhere  in  this  Section
         specifically  dealt with or which has been  expressly  included in this
         Indenture  solely for the benefit of a series of Securities  other than
         that series), and continuance of such default or breach for a period of

                                       26

<PAGE>



         60 days after there has been given, by registered or certified mail, to
         the  Company by the  Trustee or to the  Company  and the Trustee by the
         Holders of at least a majority in principal  amount of the  Outstanding
         Securities of that series a written notice  specifying  such default or
         breach and  requiring it to be remedied and stating that such notice is
         a "Notice of Default" hereunder; or

                  (5) a  default  under  any  bond,  debenture,  note  or  other
         evidence  of  indebtedness  of the  Company,  or  under  any  mortgage,
         indenture or other instrument of the Company  (including a default with
         respect to Securities of any series other than that series) under which
         there may be issued or by which there may be secured  any  indebtedness
         of the  Company  (or by any  Subsidiary,  the  repayment  of which  the
         Company has guaranteed or for which the Company is directly responsible
         or liable as obligor  or  guarantor),  whether  such  indebtedness  now
         exists or shall hereafter be created,  which default shall constitute a
         failure to pay an aggregate  principal amount exceeding  $25,000,000 of
         such  indebtedness  when due and payable  after the  expiration  of any
         applicable grace period with respect thereto and shall have resulted in
         such   indebtedness  in  an  aggregate   principal   amount   exceeding
         $25,000,000  becoming or being  declared  due and payable  prior to the
         date on which it would  otherwise have become due and payable,  without
         such indebtedness  having been discharged,  or such acceleration having
         been  rescinded  or  annulled,  within a period of 10 days after  there
         shall have been given,  by registered or certified mail, to the Company
         by the  Trustee or to the  Company and the Trustee by the Holders of at
         least a majority in principal  amount of the Outstanding  Securities of
         that series a written notice  specifying such default and requiring the
         Company  to cause  such  indebtedness  to be  discharged  or cause such
         acceleration  to be  rescinded or annulled and stating that such notice
         is a "Notice of Default" hereunder; or

                  (6) the Company or any Significant  Subsidiary  pursuant to or
         within the meaning of any Bankruptcy Law:

                           (A) commences a voluntary case,

                           (B)  consents  to the  entry of an order  for  relief
                  against it in an involuntary case,

                           (C) consents to the  appointment of a Custodian of it
                  or for all or substantially all of its property, or

                           (D) makes a general assignment for the benefit of its
                  creditors; or

                  (7) a court  of  competent  jurisdiction  enters  an  order or
         decree under any Bankruptcy Law that:

                           (A)  is  for  relief   against  the  Company  or  any
                  Significant Subsidiary in an involuntary case,

                           (B)  appoints  a  Custodian  of  the  Company  or any
                  Significant  Subsidiary  or for  all or  substantially  all of
                  either of its property, or

                           (C)  orders  the  liquidation  of the  Company or any
                  Significant  Subsidiary,  and  the  order  or  decree  remains
                  unstayed and in effect for 90 days; or

                  (8) any  other  Event of  Default  provided  with  respect  to
         Securities of that series.


                                       27
<PAGE>

As used in this Section 501, the term "Bankruptcy Law" means Title 11, U.S. Code
or any  similar  Federal  or State law for the  relief of  debtors  and the term
"Custodian" means any receiver,  trustee, assignee,  liquidator or other similar
official under any Bankruptcy Law.

                  SECTION  502.   Acceleration   of  Maturity;   Rescission  and
Annulment.  If an Event of Default with respect to  Securities  of any series at
the time  Outstanding  occurs and is continuing  (other than an Event of Default
described in Section 501(6) or 501(7)),  then and in every such case the Trustee
or  the  Holders  of not  less  than  a  majority  in  principal  amount  of the
Outstanding  Securities  of that series may declare  the  principal  (or, if any
Securities are Original Issue Discount  Securities or Indexed  Securities,  such
portion of the  principal as may be  specified in the terms  thereof) of all the
Securities  of that  series to be due and  payable  immediately,  by a notice in
writing to the Company  (and to the Trustee if given by the  Holders),  and upon
any such  declaration  such principal or specified  portion thereof shall become
immediately due and payable.  If an Event of Default described in Section 501(6)
or 501(7)  with  respect to any  series of  Securities  at the time  outstanding
occurs, the principal amount of all of the Securities of that series (or, in the
case of any such Original Issue Discount Securities or Indexed Securities,  such
portion  of the  principal  as may be  specified  in  the  terms  thereof)  will
automatically,  and  without  any action by the  Trustee or any Holder  thereof,
become immediately due and payable.

                  At any time  after such a  declaration  of  acceleration  with
respect to  Securities  of any  series  has been made and  before a judgment  or
decree  for  payment  of the  money  due has been  obtained  by the  Trustee  as
hereinafter  in this  Article  provided,  the Holders of a majority in principal
amount of the  Outstanding  Securities of that series,  by written notice to the
Company  and the  Trustee,  may  rescind  and  annul  such  declaration  and its
consequences if:

                  (1) the Company has paid or  deposited  with the Trustee a sum
         sufficient to pay in the currency,  currency unit or composite currency
         in which the Securities of such series are payable (except as otherwise
         specified pursuant to Section 301 for the Securities of such series):

                           (A) all overdue  installments  of interest on and any
                  Additional  Amounts  payable  in  respect  of all  Outstanding
                  Securities of that series and any related coupons,

                           (B) the  principal of (and  premium,  if any, on) any
                  Outstanding  Securities  of that series  which have become due
                  otherwise  than  by  such   declaration  of  acceleration  and
                  interest thereon at the rate or rates borne by or provided for
                  in such Securities,

                           (C) to the extent  that  payment of such  interest is
                  lawful, interest upon overdue installments of interest and any
                  Additional  Amounts at the rate or rates  borne by or provided
                  for in such Securities, and

                           (D)  all  sums  paid  or   advanced  by  the  Trustee
                  hereunder   and   the   reasonable   compensation,   expenses,
                  disbursements  and  advances  of the  Trustee,  its agents and
                  counsel; and

                  (2) all Events of Default with respect to  Securities  of that
         series,  other than the nonpayment of the principal of (or premium,  if
         any) or interest  on  Securities  of that series  which have become due
         solely by such declaration of  acceleration,  have been cured or waived
         as provided in Section 513.

No such  rescission  shall  affect  any  subsequent  default or impair any right
consequent thereon.

                  SECTION  503.   Collection  of  Indebtedness   and  Suits  for
Enforcement by Trustee. The Company covenants that if:


                                       28
<PAGE>

                  (1)  default  is made in the  payment  of any  installment  of
         interest or Additional  Amounts,  if any, on any Security of any series
         and any related coupon when such interest or Additional  Amount becomes
         due and payable and such default continues for a period of 30 days, or

                  (2)  default is made in the  payment of the  principal  of (or
         premium, if any, on) any Security of any series at its Maturity,

then the Company will, upon demand of the Trustee,  pay to the Trustee,  for the
benefit of the Holders of such Securities of such series and coupons,  the whole
amount then due and payable on such  Securities  and coupons for principal  (and
premium, if any) and interest and Additional Amounts thereon, with interest upon
any overdue  principal (and premium,  if any) and, to the extent that payment of
such interest shall be legally  enforceable,  upon any overdue  installments  of
interest or Additional Amounts thereon, if any, at the rate or rates borne by or
provided for in such Securities,  and, in addition thereto,  such further amount
as shall be sufficient to cover the costs and expenses of collection,  including
the  reasonable  compensation,  expenses,  disbursements  and  advances  of  the
Trustee, its agents and counsel.

                  If the Company fails to pay such amounts  forthwith  upon such
demand,  the Trustee,  in its own name and as trustee of an express  trust,  may
institute  a  judicial  proceeding  for the  collection  of the  sums so due and
unpaid,  and may prosecute such proceeding to judgment or final decree,  and may
enforce the same against the Company or any other  obligor upon such  Securities
of such series and  collect the moneys  adjudged or decreed to be payable in the
manner  provided by law out of the property of the Company or any other  obligor
upon such Securities of such series, wherever situated.

                  If an Event of  Default  with  respect  to  Securities  of any
series occurs and is continuing,  the Trustee may in its  discretion  proceed to
protect and enforce  its rights and the rights of the Holders of  Securities  of
such series and any related coupons by such appropriate  judicial proceedings as
the Trustee  shall deem most  effectual  to protect and enforce any such rights,
whether  for the  specific  enforcement  of any  covenant or  agreement  in this
Indenture or in aid of the exercise of any power granted  herein,  or to enforce
any other proper remedy.

                  SECTION 504.  Trustee May File Proofs of Claim. In case of the
pendency   of   any   receivership,    insolvency,   liquidation,    bankruptcy,
reorganization,   arrangement,   adjustment,   composition   or  other  judicial
proceeding  relative to the Company or any other obligor upon the  Securities or
the  property of the Company or of such other  obligor or their  creditors,  the
Trustee  (irrespective  of whether the principal of the Securities of any series
shall  then be due  and  payable  as  therein  expressed  or by  declaration  or
otherwise and  irrespective of whether the Trustee shall have made any demand on
the  Company  for the payment of overdue  principal  of, or premium,  if any, or
interest on, the Securities) shall be entitled and empowered, by intervention in
such proceeding or otherwise:

                           (i) to file and prove a claim  for the whole  amount,
         or such lesser amount as may be provided for in the  Securities of such
         series, of principal (and premium,  if any) and interest and Additional
         Amount,  if any,  owing and unpaid in respect of the  Securities and to
         file such other papers or documents as may be necessary or advisable in
         order to have the claims of the  Trustee  (including  any claim for the
         reasonable  compensation,  expenses,  disbursements and advances of the
         Trustee,  its agents and  counsel)  and of the Holders  allowed in such
         judicial proceeding, and

                           (ii)     to collect and receive any moneys or other 
         property payable or deliverable on any such claims and to distribute 
         the same;

and any custodian,  receiver,  assignee, trustee,  liquidator,  sequestrator (or
other similar official) in any such judicial  proceeding is hereby authorized by
each Holder of  Securities  of such series and coupons to make such  payments to
the Trustee,  and in the event that the Trustee  shall  consent to the making of
such payments  directly to the Holders,  to pay to the Trustee any amount due to
it for the reasonable compensation, expenses, disbursements and advances

                                       29

<PAGE>



of the Trustee and any predecessor  Trustee,  their agents and counsel,  and any
other amounts due the Trustee or any predecessor Trustee under Section 606.

                  Nothing  herein  contained  shall be deemed to  authorize  the
Trustee to authorize or consent to or accept or adopt on behalf of any Holder of
a Security  or coupon any plan of  reorganization,  arrangement,  adjustment  or
composition  affecting  the  Securities  or  coupons or the rights of any Holder
thereof,  or to  authorize  the  Trustee  to vote in respect of the claim of any
Holder of a Security or coupon in any such proceeding.

                  SECTION 505. Trustee May Enforce Claims Without  Possession of
Securities or Coupons.  All rights of action and claims under this  Indenture or
any of the  Securities or coupons may be prosecuted  and enforced by the Trustee
without the  possession of any of the  Securities  or coupons or the  production
thereof in any proceeding relating thereto,  and any such proceeding  instituted
by the Trustee shall be brought in its own name as trustee of an express  trust,
and any  recovery  of judgment  shall,  after  provision  for the payment of the
reasonable  compensation,  expenses,  disbursements and advances of the Trustee,
its agents and counsel,  be for the ratable benefit of the Holders of Securities
and coupons in respect of which such judgment has been recovered.

                  SECTION  506.  Application  of  Money  Collected.   Any  money
collected  by the  Trustee  pursuant  to this  Article  shall be  applied in the
following  order,  at the date or dates fixed by the Trustee and, in case of the
distribution  of such money on  account of  principal  (or  premium,  if any) or
interest and any  Additional  Amounts,  upon  presentation  of the Securities or
coupons, or both, as the case may be, and the notation thereon of the payment if
only partially paid and upon surrender thereof if fully paid:

                           FIRST:  To the payment of all amounts due to the 
         Trustee and any predecessor Trustee under Section 606;

                           SECOND:  To the payment of the  amounts  then due and
         unpaid upon the Securities  and coupons for principal (and premium,  if
         any) and interest and any  Additional  Amounts  payable,  in respect of
         which  or for the  benefit  of which  such  money  has been  collected,
         ratably,  without preference or priority of any kind,  according to the
         aggregate  amounts due and payable on such  Securities  and coupons for
         principal  (and  premium,  if any),  interest and  Additional  Amounts,
         respectively; and

                           THIRD:  To the payment of the remainder, if any, to 
         the Company.

                  SECTION 507. Limitation on Suits. No Holder of any Security of
any  series  or any  related  coupon  shall  have  any  right to  institute  any
proceeding,  judicial or otherwise,  with respect to this Indenture,  or for the
appointment of a receiver or trustee, or for any other remedy hereunder, unless:

                  (1) such Holder has  previously  given  written  notice to the
         Trustee of a continuing Event of Default with respect to the Securities
         of that series;

                  (2) the  Holders  of not less  than a  majority  in  principal
         amount of the  Outstanding  Securities  of that series  shall have made
         written  request to the Trustee to institute  proceedings in respect of
         such Event of Default in its own name as Trustee hereunder;

                  (3)  such  Holder  or  Holders  have  offered  to the  Trustee
         reasonable indemnity against the costs,  expenses and liabilities to be
         incurred in compliance with such request;

                  (4) the Trustee for 60 days after its receipt of such  notice,
         request  and  offer of  indemnity  has  failed  to  institute  any such
         proceeding; and

                                       30
<PAGE>

                  (5) no direction  inconsistent  with such written  request has
         been given to the Trustee during such 60-day period by the Holders of a
         majority in  principal  amount of the  Outstanding  Securities  of that
         series;

it being  understood and intended that no one or more of such Holders shall have
any right in any manner  whatever by virtue of, or by availing of, any provision
of this  Indenture to affect,  disturb or  prejudice  the rights of any other of
such Holders,  or to obtain or to seek to obtain priority or preference over any
other of such  Holders or to enforce any right under this  Indenture,  except in
the manner  herein  provided  and for the equal and ratable  benefit of all such
Holders.

                  SECTION  508.   Unconditional  Right  of  Holders  to  Receive
Principal, Premium, if any, Interest and Additional Amounts. Notwithstanding any
other  provision in this  Indenture,  the Holder of any Security or coupon shall
have the right which is absolute  and  unconditional  to receive  payment of the
principal  of (and  premium,  if any)  and  (subject  to  Sections  305 and 307)
interest on, and any Additional  Amounts in respect of, such Security or payment
of such coupon on the respective due dates  expressed in such Security or coupon
(or, in the case of redemption,  on the  Redemption  Date) and to institute suit
for the  enforcement of any such payment,  and such rights shall not be impaired
without the consent of such Holder.

                  SECTION  509.  Restoration  of  Rights  and  Remedies.  If the
Trustee or any Holder of a Security or coupon has  instituted  any proceeding to
enforce any right or remedy under this  Indenture and such  proceeding  has been
discontinued or abandoned for any reason,  or has been  determined  adversely to
the  Trustee or to such  Holder,  then and in every such case the  Company,  the
Trustee  and the  Holders  of  Securities  and  coupons  shall,  subject  to any
determination  in such  proceeding,  be restored  severally and  respectively to
their former  positions  hereunder and thereafter all rights and remedies of the
Trustee and the Holders  shall  continue as though no such  proceeding  had been
instituted.

                  SECTION  510.  Rights  and  Remedies  Cumulative.   Except  as
otherwise  provided  with respect to the  replacement  or payment of  mutilated,
destroyed, lost or stolen Securities or coupons in the last paragraph of Section
306, no right or remedy herein  conferred  upon or reserved to the Trustee or to
the Holders of  Securities  or coupons is intended to be  exclusive of any other
right or remedy,  and every right and remedy shall,  to the extent  permitted by
law,  be  cumulative  and in  addition  to every  other  right and remedy  given
hereunder or now or  hereafter  existing at law or in equity or  otherwise.  The
assertion or employment of any right or remedy  hereunder,  or otherwise,  shall
not prevent the  concurrent  assertion or  employment  of any other  appropriate
right or remedy.

                  SECTION  511.  Delay  or  Omission  Not  Waiver.  No  delay or
omission of the  Trustee or of any Holder of any  Security or coupon to exercise
any right or remedy  accruing  upon any Event of Default  shall  impair any such
right or  remedy  or  constitute  a waiver of any such  Event of  Default  or an
acquiescence therein.  Every right and remedy given by this Article or by law to
the Trustee or to the Holders may be exercised  from time to time,  and as often
as may be deemed  expedient,  by the Trustee or by the Holders of  Securities or
coupons, as the case may be.

                  SECTION 512. Control by Holders of Securities.  The Holders of
not less than a majority in principal  amount of the  Outstanding  Securities of
any  series  shall  have the  right to  direct  the  time,  method  and place of
conducting any proceeding for any remedy  available to the Trustee or exercising
any trust or power  conferred on the Trustee with respect to the  Securities  of
such series; provided that

                  (1) such  direction  shall not be in conflict with any rule of
         law or with this Indenture,

                  (2) the Trustee may take any other action deemed proper by the
         Trustee which is not inconsistent with such direction, and

                                       31
<PAGE>

                  (3) the Trustee need not take any action which might expose it
         to  personal  liability  or be unduly  prejudicial  to the  Holders  of
         Securities of such series not joining therein.

                  SECTION 513. Waiver of Past Defaults.  The Holders of not less
than a majority in principal amount of the Outstanding  Securities of any series
may on  behalf of the  Holders  of all the  Securities  of such  series  and any
related coupons waive any past default hereunder with respect to such series and
its consequences, except a default

                  (1) in the payment of the principal of (or premium, if any) or
         interest on or Additional Amounts payable in respect of any Security of
         such series or any related coupons, or

                  (2) in respect of a covenant or  provision  hereof which under
         Article  Nine cannot be modified or amended  without the consent of the
         Holder of each Outstanding Security of such series affected.

         Upon any such waiver,  such default shall cease to exist, and any Event
of  Default  arising  therefrom  shall be deemed to have been  cured,  for every
purpose of this Indenture;  but no such waiver shall extend to any subsequent or
other default or Event of Default or impair any right consequent thereon.

                  SECTION  514.  Waiver of Usury,  Stay or Extension  Laws.  The
Company covenants (to the extent that it may lawfully do so) that it will not at
any time insist upon, or plead,  or in any manner  whatsoever  claim or take the
benefit or advantage of, any usury, stay or extension law wherever enacted,  now
or at any time  hereafter  in  force,  which may  affect  the  covenants  or the
performance  of this  Indenture;  and the  Company  (to the  extent  that it may
lawfully do so) hereby  expressly  waives all benefit or  advantage  of any such
law, and covenants that it will not hinder, delay or impede the execution of any
power herein granted to the Trustee, but will suffer and permit the execution of
every such power as though no such law had been enacted.

                  SECTION  515.  Undertaking  for  Costs.  All  parties  to this
Indenture agree, and each Holder of any Security by his acceptance thereof shall
be deemed to have agreed,  that any court may in its discretion  require, in any
suit for the enforcement of any right or remedy under this Indenture,  or in any
suit against the Trustee for any action  taken or omitted by it as Trustee,  the
filing by any party  litigant in such suit of an undertaking to pay the costs of
such suit, and that such court may in its discretion  assess  reasonable  costs,
including  reasonable  attorneys' fees,  against any party litigant in such suit
having due regard to the merits and good faith of the claims or defenses made by
such party  litigant;  but the provisions of this Section shall not apply to any
suit instituted by the Trustee,  to any suit instituted by any Holder,  or group
of Holders, holding in the aggregate more than a majority in principal amount of
the  Outstanding  Securities,  or to any suit  instituted  by any Holder for the
enforcement of the payment of the principal of (or premium,  if any) or interest
on any Security on or after the respective Stated  Maturities  expressed in such
Security (or, in the case of redemption, on or after the Redemption Date).


                                   ARTICLE SIX

                                   THE TRUSTEE

                  SECTION  601.  Notice of  Defaults.  Within 90 days  after the
occurrence  of any  default  hereunder  with  respect to the  Securities  of any
series,  the Trustee shall transmit in the manner and to the extent  provided in
TIA Section  313(c),  notice of such  default  hereunder  known to the  Trustee,
unless such default shall have been cured or waived;  provided,  however,  that,
except in the case of a default in the payment of the  principal of (or premium,
if any) or interest on or any  Additional  Amounts or sinking  fund  installment
with respect to the Securities of such series, the Trustee shall be protected in
withholding such notice if and so long as Responsible Officers of the Trustee in
good faith  determine that the  withholding of such notice is in the interest of
the Holders of the Securities and coupons of such series;  and provided  further
that in the case of any default or breach of the character  specified in Section
501(4) with respect to the Securities and coupons of such series, no such notice
to Holders shall be given

                                       32
<PAGE>

until at least 60 days after the  occurrence  thereof.  For the  purpose of this
Section,  the term "default"  means any event which is, or after notice or lapse
of time or both would become, an Event of Default with respect to the Securities
of such series.

                  SECTION  602.  Certain  Rights  of  Trustee.  Subject  to  the
provisions of TIA Section 315(a) through 315(d):

                           (1) the  Trustee may rely and shall be  protected  in
         acting or  refraining  from  acting upon any  resolution,  certificate,
         statement,  instrument,  opinion,  report, notice, request,  direction,
         consent,  order,  bond,  debenture,  note,  coupon  or  other  paper or
         document  believed  by it to be  genuine  and to have  been  signed  or
         presented by the proper party or parties;

                           (2) any request or direction of the Company mentioned
         herein shall be sufficiently  evidenced by a Company Request or Company
         Order (other than delivery of any  Security,  together with any coupons
         appertaining  thereto,  to the Trustee for  authentication and delivery
         pursuant  to  Section  303 which  shall be  sufficiently  evidenced  as
         provided  therein) and any  resolution of the Board of Directors may be
         sufficiently evidenced by a Board Resolution;

                           (3) whenever in the  administration of this Indenture
         the  Trustee  shall  deem it  desirable  that a  matter  be  proved  or
         established  prior to taking,  suffering or omitting to take any action
         hereunder,  the Trustee  (unless other evidence be herein  specifically
         prescribed)  may, in the absence of bad faith on its part, rely upon an
         Officers' Certificate;

                           (4) the  Trustee  may  consult  with  counsel and the
         advice of such  counsel or any  Opinion  of  Counsel  shall be full and
         complete  authorization  and protection in respect of any action taken,
         suffered  or omitted  by it  hereunder  in good  faith and in  reliance
         thereon;

                           (5) the  Trustee  shall  be under  no  obligation  to
         exercise any of the rights or powers vested in it by this  Indenture at
         the request or  direction  of any of the Holders of  Securities  of any
         series or any related coupons  pursuant to this Indenture,  unless such
         Holders  shall  have  offered to the  Trustee  reasonable  security  or
         indemnity  against the costs,  expenses and liabilities  which might be
         incurred by it in compliance with such request or direction;

                           (6) the  Trustee  shall  not be  bound  to  make  any
         investigation  into the  facts or  matters  stated  in any  resolution,
         certificate,  statement,  instrument, opinion, report, notice, request,
         direction, consent, order, bond, debenture, note, coupon or other paper
         or document, but the Trustee, in its discretion,  may make such further
         inquiry or investigation  into such facts or matters as it may see fit,
         and, if the Trustee  shall  determine to make such  further  inquiry or
         investigation,  it shall be entitled to examine the books,  records and
         premises of the Company, personally or by agent or attorney;

                           (7) the  Trustee  may  execute  any of the  trusts or
         powers  hereunder or perform any duties hereunder either directly or by
         or through agents or attorneys and the Trustee shall not be responsible
         for any  misconduct  or negligence on the part of any agent or attorney
         appointed with due care by it hereunder; and

                           (8) the  Trustee  shall not be liable  for any action
         taken,  suffered or omitted by it in good faith and reasonably believed
         by it to be  authorized  or within the  discretion  or rights or powers
         conferred upon it by this Indenture.

                  The  Trustee  shall not be  required to expend or risk its own
funds or otherwise  incur any financial  liability in the  performance of any of
its duties hereunder, or in the exercise of any of its rights or powers.


                                       33
<PAGE>

                  SECTION  603.  Not  Responsible  for  Recitals  or Issuance of
Securities.  The recitals  contained  herein and in the  Securities,  except the
Trustee's  certificate of  authentication,  and in any coupons shall be taken as
the  statements of the Company,  and neither the Trustee nor any  Authenticating
Agent assumes any  responsibility  for their  correctness.  The Trustee makes no
representations  as to the validity or  sufficiency  of this Indenture or of the
Securities  or  coupons,  except  that the  Trustee  represents  that it is duly
authorized to execute and deliver this  Indenture,  authenticate  the Securities
and   perform   its   obligations   hereunder.   Neither  the  Trustee  nor  the
Authenticating  Agent shall be  accountable  for the use or  application  by the
Company of Securities or the proceeds thereof.

                  SECTION 604.  May Hold  Securities.  The  Trustee,  any Paying
Agent,  Security  Registrar,  Authenticating  Agent  or any  other  agent of the
Company,  in its  individual  or any other  capacity,  may  become  the owner or
pledgee of Securities and coupons and,  subject to TIA Sections  310(b) and 311,
may  otherwise  deal with the  Company  with the same rights it would have if it
were not Trustee, Paying Agent, Security Registrar, Authenticating Agent or such
other agent.

                  SECTION 605. Money Held in Trust. Money held by the Trustee in
trust  hereunder  need not be  segregated  from other funds except to the extent
required by law.  The Trustee  shall be under no  liability  for interest on any
money received by it hereunder except as otherwise agreed with the Company.

                  SECTION  606.  Compensation  and  Reimbursement.  The  Company
agrees:

                           (1)  to  pay  to  the  Trustee   from  time  to  time
         reasonable  compensation  for all  services  rendered  by it  hereunder
         (which  compensation  shall not be limited by any  provision  of law in
         regard to the compensation of a trustee of an express trust);

                           (2) except as otherwise expressly provided herein, to
         reimburse  each of the Trustee  and any  predecessor  Trustee  upon its
         request  for  all  reasonable  expenses,   disbursements  and  advances
         incurred or made by the Trustee in  accordance  with any  provision  of
         this Indenture (including the reasonable  compensation and the expenses
         and disbursements of its agents and counsel),  except any such expense,
         disbursement or advance as may be attributable to its negligence or bad
         faith; and

                           (3)  to  indemnify   each  of  the  Trustee  and  any
         predecessor  Trustee  for, and to hold it harmless  against,  any loss,
         liability or expense  incurred  without  negligence or bad faith on its
         own  part,  arising  out of or in  connection  with the  acceptance  or
         administration  of the trust or trusts  hereunder,  including the costs
         and  expenses of  defending  itself  against any claim or  liability in
         connection  with the  exercise or  performance  of any of its powers or
         duties hereunder.

                  When the  Trustee  incurs  expenses  or  renders  services  in
connection  with an Event of  Default  specified  in  Section  501(6) or Section
501(7),  the  expenses  (including  the  reasonable  charges and expenses of its
counsel)  and the  compensation  for the  services  are  intended to  constitute
expenses of  administration  under any applicable  Federal or state  bankruptcy,
insolvency or other similar law.

                  As security  for the  performance  of the  obligations  of the
Company  under  this  Section,  the  Trustee  shall  have  a lien  prior  to the
Securities upon all property and funds held or collected by the Trustee as such,
except funds held in trust for the payment of principal of (or premium,  if any)
or interest on particular Securities or coupons.

                  The  provisions of this Section shall survive the  termination
of this Indenture.

                  SECTION  607.   Corporate   Trustee   Required;   Eligibility;
Conflicting  Interests.  There shall at all times be a Trustee  hereunder  which
shall be eligible to act as Trustee under TIA Section 310(a)(1) and shall have a
combined  capital  and  surplus  of at least  $50,000,000.  If such  corporation
publishes reports of condition at least

                                       34
<PAGE>

annually,  pursuant to law or the requirements of Federal, state, Territorial or
District of Columbia supervising or examining  authority,  then for the purposes
of this Section,  the combined capital and surplus of such corporation  shall be
deemed to be its  combined  capital  and surplus as set forth in its most recent
report of condition so  published.  If at any time the Trustee shall cease to be
eligible in accordance  with the  provisions  of this  Section,  it shall resign
immediately  in the  manner and with the effect  hereinafter  specified  in this
Article.

                  SECTION  608.   Resignation   and  Removal;   Appointment   of
Successor.  (a) No resignation or removal of the Trustee and no appointment of a
successor  Trustee  pursuant to this Article  shall become  effective  until the
acceptance  of  appointment  by the  successor  Trustee in  accordance  with the
applicable requirements of Section 609.

                  (b) The  Trustee  may  resign at any time with  respect to the
Securities  of one or more  series  by  giving  written  notice  thereof  to the
Company.  If an instrument  of acceptance by a successor  Trustee shall not have
been  delivered to the Trustee within 30 days after the giving of such notice of
resignation,   the  resigning  Trustee  may  petition  any  court  of  competent
jurisdiction for the appointment of a successor Trustee.

                  (c) The Trustee may be removed at any time with respect to the
Securities of any series by Act of the Holders of a majority in principal amount
of the Outstanding Securities of such series delivered to the Trustee and to the
Company.

                  (d)       If at any time:

                           (1)  the  Trustee  shall  fail  to  comply  with  the
         provisions of TIA Section 310(b) after written request  therefor by the
         Company or by any Holder of a Security  who has been a bona fide Holder
         of a Security for at least six months, or

                           (2) the  Trustee  shall  cease to be  eligible  under
         Section 607(a) and shall fail to resign after written request  therefor
         by the Company or by any Holder of a Security  who has been a bona fide
         Holder of a Security for at least six months, or

                           (3) the Trustee  shall become  incapable of acting or
         shall be adjudged a bankrupt or  insolvent or a receiver of the Trustee
         or of its property  shall be appointed or any public officer shall take
         charge or control of the Trustee or of its  property or affairs for the
         purpose of rehabilitation, conservation or liquidation,

then, in any such case, (i) the Company by or pursuant to a Board Resolution may
remove  the  Trustee  and  appoint  a  successor  Trustee  with  respect  to all
Securities,  or (ii) subject to TIA Section 315(e), any Holder of a Security who
has been a bona fide Holder of a Security for at least six months may, on behalf
of himself and all others  similarly  situated,  petition any court of competent
jurisdiction  for the removal of the Trustee with respect to all  Securities and
the appointment of a successor Trustee or Trustees.

                  (e)  If  the  Trustee  shall  resign,  be  removed  or  become
incapable  of acting,  or if a vacancy  shall occur in the office of Trustee for
any reason with respect to the Securities of one or more series, the Company, by
or pursuant to a Board Resolution, shall promptly appoint a successor Trustee or
Trustees  with  respect  to the  Securities  of that or those  series  (it being
understood that any such successor  Trustee may be appointed with respect to the
Securities of one or more or all of such series and that at any time there shall
be only one Trustee with respect to the  Securities of any  particular  series).
If,  within one year after such  resignation,  removal or  incapability,  or the
occurrence of such vacancy,  a successor  Trustee with respect to the Securities
of any  series  shall  be  appointed  by Act of the  Holders  of a  majority  in
principal  amount of the Outstanding  Securities of such series delivered to the
Company and the retiring  Trustee,  the  successor  Trustee so appointed  shall,
forthwith upon its acceptance of such appointment,  become the successor Trustee
with respect to the  Securities of such series and to that extent  supersede the
successor Trustee appointed by the Company. If no successor Trustee with respect
to the Securities of any series

                                       35
<PAGE>

shall have been so  appointed  by the Company or the Holders of  Securities  and
accepted appointment in the manner hereinafter provided any Holder of a Security
who has been a bona fide  Holder of a Security  of such  series for at least six
months may, on behalf of himself and all others similarly situated, petition any
court of competent  jurisdiction for the appointment of a successor Trustee with
respect to Securities of such series.

                  (f) The Company shall give notice of each resignation and each
removal of the Trustee  with  respect to the  Securities  of any series and each
appointment of a successor  Trustee with respect to the Securities of any series
in the manner  provided for notices to the Holders of Securities in Section 106.
Each notice shall include the name of the successor  Trustee with respect to the
Securities of such series and the address of its Corporate Trust Office.

                  SECTION 609.  Acceptance of Appointment  by Successor.  (a) In
case of the  appointment  hereunder  of a successor  Trustee with respect to all
Securities,  every such successor Trustee shall execute, acknowledge and deliver
to  the  Company  and to the  retiring  Trustee  an  instrument  accepting  such
appointment,  and thereupon the  resignation or removal of the retiring  Trustee
shall become effective and such successor Trustee, without any further act, deed
or  conveyance,  shall  become  vested with all the rights,  powers,  trusts and
duties  of the  retiring  Trustee;  but,  upon  request  of the  Company  or the
successor  Trustee,  such retiring  Trustee shall,  upon payment of its charges,
execute and deliver an instrument transferring to such successor Trustee all the
rights,  powers  and trusts of the  retiring  Trustee,  and shall  duly  assign,
transfer  and deliver to such  successor  Trustee all property and money held by
such retiring  Trustee  hereunder,  subject  nevertheless  to its claim, if any,
provided for in Section 606.

                  (b)  In  case  of the  appointment  hereunder  of a  successor
Trustee with respect to the Securities of one or more (but not all) series,  the
Company,  the retiring  Trustee and each  successor  Trustee with respect to the
Securities  of one or  more  series  shall  execute  and  deliver  an  indenture
supplemental  hereto,  pursuant to Article Nine hereof,  wherein each  successor
Trustee  shall  accept  such  appointment  and  which  (1)  shall  contain  such
provisions as shall be necessary or desirable to transfer and confirm to, and to
vest in, each successor Trustee all the rights, powers, trusts and duties of the
retiring Trustee with respect to the Securities of that or those series to which
the appointment of such successor  Trustee relates,  (2) if the retiring Trustee
is not retiring with respect to all Securities, shall contain such provisions as
shall be deemed  necessary or desirable to confirm that all the rights,  powers,
trusts and duties of the retiring Trustee with respect to the Securities of that
or those series as to which the retiring  Trustee is not retiring shall continue
to be vested in the retiring Trustee,  and (3) shall add to or change any of the
provisions of this  Indenture as shall be necessary to provide for or facilitate
the  administration  of the trusts hereunder by more than one Trustee,  it being
understood  that  nothing  herein  or  in  such  supplemental   indenture  shall
constitute  such  Trustees  co-trustees  of the same  trust  and that  each such
Trustee shall be trustee of a trust or trusts hereunder  separate and apart from
any trust or trusts hereunder  administered by any other such Trustee;  and upon
the execution and delivery of such  supplemental  indenture the  resignation  or
removal of the retiring  Trustee shall become  effective to the extent  provided
therein  and each such  successor  Trustee,  without any  further  act,  deed or
conveyance,  shall become vested with all the rights,  powers, trusts and duties
of the retiring  Trustee with respect to the  Securities of that or those series
to which the appointment of such successor  Trustee relates;  but, on request of
the Company or any successor  Trustee,  such retiring Trustee shall duly assign,
transfer  and deliver to such  successor  Trustee all property and money held by
such retiring Trustee  hereunder with respect to the Securities of that or those
series to which the appointment of such successor Trustee relates.

                  (c) Upon request of any such  successor  Trustee,  the Company
shall execute any and all instruments  for more fully and certainly  vesting in,
and  confirming  to such  successor  Trustee all such rights,  powers and trusts
referred to in paragraph (a) or (b) of this Section, as the case may be.

                  (d) No successor  Trustee shall accept its appointment  unless
at the time of such  acceptance  such  successor  Trustee shall be qualified and
eligible under this Article.

                  SECTION 610. Merger,  Conversion,  Consolidation or Succession
to Business.  Any corporation  into which the Trustee may be merged or converted
or with which it may be consolidated, or any corporation

                                       36
<PAGE>

resulting  from any merger,  conversion  or  consolidation  to which the Trustee
shall be a party, or any corporation  succeeding to all or substantially  all of
the  corporate  trust  business of the  Trustee,  shall be the  successor of the
Trustee  hereunder;  provided such corporation shall be otherwise  qualified and
eligible under this Article, without the execution or filing of any paper or any
further act on the part of any of the parties hereto.  In case any Securities or
coupons shall have been authenticated, but not delivered, by the Trustee then in
office,   any  successor  by  merger,   conversion  or   consolidation  to  such
authenticating  Trustee may adopt such authentication and deliver the Securities
or coupons so  authenticated  with the same effect as if such successor  Trustee
had itself  authenticated such Securities or coupons.  In case any Securities or
coupons shall not have been authenticated by such predecessor  Trustee, any such
successor  Trustee may authenticate  and deliver such Securities or coupons,  in
either its own name or that of its predecessor Trustee,  with the full force and
effect which this Indenture  provides for the certificate of  authentication  of
the Trustee.

                  SECTION 611. Appointment of Authentication  Agent. At any time
when any of the  Securities  remain  Outstanding,  the  Trustee  may  appoint an
Authenticating  Agent or Agents with respect to one or more series of Securities
which  shall be  authorized  to act on behalf  of the  Trustee  to  authenticate
Securities  of such series  issued upon  exchange,  registration  of transfer or
partial redemption or repayment thereof,  and Securities so authenticated  shall
be entitled to the benefits of this  Indenture and shall be valid and obligatory
for  all  purposes  as if  authenticated  by the  Trustee  hereunder.  Any  such
appointment  shall  be  evidenced  by  an  instrument  in  writing  signed  by a
Responsible Officer of the Trustee, a copy of which instrument shall be promptly
furnished to the Company.  Wherever  reference is made in this  Indenture to the
authentication  and  delivery  of  Securities  by the  Trustee or the  Trustee's
certificate  of  authentication,  such  reference  shall be  deemed  to  include
authentication and delivery on behalf of the Trustee by an Authenticating  Agent
and a  certificate  of  authentication  executed  on behalf of the Trustee by an
Authenticating  Agent.  Each  Authenticating  Agent shall be  acceptable  to the
Company and, except as may other wise be provided pursuant to Section 301, shall
at all  times be a bank or trust  company  or  corporation  organized  and doing
business and in good standing  under the laws of the United States of America or
of any State or the District of Columbia,  authorized  under such laws to act as
Authenticating  Agent,  having a combined  capital  and surplus of not less than
$50,000,000  and  subject  to  supervision  or  examination  by federal or state
authorities.  If such  Authenticating  Agent  publishes  reports of condition at
least annually, pursuant to law or the requirements of the aforesaid supervising
or  examining  authority,  then for the purposes of this  Section,  the combined
capital  and  surplus  of such  Authenticating  Agent  shall be deemed to be its
combined capital and surplus as set forth in its most recent report of condition
so  published.  In case at any time an  Authenticating  Agent  shall cease to be
eligible in accordance with the provisions of this Section,  such Authenticating
Agent shall resign  immediately  in the manner and with the effect  specified in
this Section.

                  Any  corporation  into  which an  Authenticating  Agent may be
merged or converted  or with which it may be  consolidated,  or any  corporation
resulting  from  any  merger,   conversion  or   consolidation   to  which  such
Authenticating  Agent shall be a party,  or any  corporation  succeeding  to the
corporate agency or corporate trust business of an Authenticating  Agent,  shall
continue to be an  Authenticating  Agent,  provided  such  corporation  shall be
otherwise  eligible  under this Section,  without the execution or filing of any
paper or further act on the part of the Trustee or the Authenticating Agent.

                  An  Authenticating  Agent for any series of Securities  may at
any time resign by giving  written notice of resignation to the Trustee for such
series and to the Company.  The Trustee for any series of Securities  may at any
time terminate the agency of an Authenticating Agent by giving written notice of
termination to such Authenticating Agent and to the Company. Upon receiving such
a notice of resignation or upon such a termination,  or in case at any time such
Authenticating  Agent  shall  cease  to  be  eligible  in  accordance  with  the
provisions of this Section,  the Trustee for such series may appoint a successor
Authenticating  Agent  which shall be  acceptable  to the Company and shall give
notice of such  appointment  to all  Holders of  Securities  of the series  with
respect to which such Authenticating Agent will serve in the manner set forth in
Section  106.  Any  successor   Authenticating  Agent  upon  acceptance  of  its
appointment hereunder shall become vested with all the rights, powers and duties
of its  predecessor  hereunder,  with like effect as if  originally  named as an
Authenticating  Agent  herein.  No  successor   Authenticating  Agent  shall  be
appointed unless eligible under the provisions of this Section.

                                       37
<PAGE>

                  The Company  agrees to pay to each  Authenticating  Agent from
time to time reasonable  compensation including  reimbursement of its reasonable
expenses for its services under this Section.

                  If an  appointment  with respect to one or more series is made
pursuant  to this  Section,  the  Securities  of such  series may have  endorsed
thereon,   in  addition  to  or  in  lieu  of  the  Trustee's   certificate   of
authentication,  an alternate certificate of authentication substantially in the
following form:

                                    This is one of the  Securities of the series
                  designated   therein  referred  to  in  the   within-mentioned
                  Indenture.

                           -----------------------------------
                                               as Trustee


                           By:_________________________________
                                       as Authenticating Agent


                           By:__________________________________
                                           Authorized Officer


                                  ARTICLE SEVEN

                HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

                  SECTION  701.  Disclosure  of Names and  Addresses of Holders.
Every Holder of Securities or coupons, by receiving and holding the same, agrees
with the Company and the  Trustee  that  neither the Company nor the Trustee nor
any  Authenticating  Agent nor any Paying Agent nor any Security Registrar shall
be held  accountable  by reason of the  disclosure of any  information as to the
names and addresses of the Holders of Securities in accordance  with TIA Section
312, regardless of the source from which such information was derived,  and that
the Trustee  shall not be held  accountable  by reason of mailing  any  material
pursuant to a request made under TIA Section 312(b).

                  SECTION 702.  Reports by Trustee.  Within 60 days after May 15
of each year  commencing  with the first  May 15 after  the  first  issuance  of
Securities pursuant to this Indenture, the Trustee shall transmit by mail to all
Holders of Securities as provided in TIA Section  313(c) a brief report dated as
of such May 15 if required by TIA Section 313(a).

                  SECTION 703.  Reports by Company.  The Company will:

                           (1) file with the  Trustee,  within 15 days after the
         Company is required to file the same with the Commission, copies of the
         annual reports and of the information,  documents and other reports (or
         copies of such portions of any of the foregoing as the  Commission  may
         from time to time by rules and regulations prescribe) which the Company
         may be required to file with the  Commission  pursuant to Section 13 or
         Section  15(d)  of the  Securities  Exchange  Act of 1934;  or,  if the
         Company  is not  required  to file  information,  documents  or reports
         pursuant to either of such Sections, then it will file with the Trustee
         and the Commission, in accordance with rules and regulations prescribed
         from  time to time by the  Commission,  such of the  supplementary  and
         periodic  information,  documents  and  reports  which may be  required
         pursuant  to  Section  13 of the  Securities  Exchange  Act of  1934 in
         respect of a security  listed and  registered on a national  securities
         exchange  as may be  prescribed  from  time to time in such  rules  and
         regulations;


                                       38

<PAGE>



                           (2) file  with the  Trustee  and the  Commission,  in
         accordance with rules and  regulations  prescribed from time to time by
         the Commission, such additional information, documents and reports with
         respect to compliance by the Company with the  conditions and covenants
         of this  Indenture  as may be required  from time to time by such rules
         and regulations; and

                           (3)  transmit by mail to the  Holders of  Securities,
         within 30 days after the filing thereof with the Trustee, in the manner
         and to the extent provided in TIA Section 313(c), such summaries of any
         information,  documents and reports required to be filed by the Company
         pursuant to  paragraphs  (1) and (2) of this section as may be required
         by  rules  and  regulations   prescribed  from  time  to  time  by  the
         Commission.

                  SECTION 704. Company to Furnish to Trustee Names and Addresses
of Holders. The Company will furnish or cause to be furnished to the Trustee:

                  (a)  semi-annually,  not later than 25 days after the  Regular
Record Date for interest for each series of Securities,  a list, in such form as
the Trustee may reasonably require, of the names and addresses of the Holders of
Registered Securities of such series as of such Regular Record Date, or if there
is  no  Regular  Record  Date  for  interest  for  such  series  of  Securities,
semiannually,  upon  such  dates as are set  forth in the  Board  Resolution  or
indenture supplemental hereto authorizing such series, and

                  (b) at such other times as the Trustee may request in writing,
within 30 days after the receipt by the Company of any such  request,  a list of
similar  form and  content  as of a date not more than 15 days prior to the time
such list is furnished;

provided,  however,  that, so long as the Trustee is the Security Registrar,  no
such list shall be required to be furnished.

                                  ARTICLE EIGHT

                CONSOLIDATION, MERGER, SALE, LEASE OR CONVEYANCE

                  SECTION 801.  Consolidations and Mergers of Company and Sales,
Leases and Conveyances Permitted Subject to Certain Conditions.  The Company may
consolidate  with,  or sell,  lease or convey  all or  substantially  all of its
assets to, or merge  with or into any other  corporation;  provided  that in any
such case,  (i) either the Company shall be the continuing  corporation,  or the
successor  corporation  shall be a corporation  organized and existing under the
laws of the United  States or a State  thereof  and such  successor  corporation
shall  expressly  assume the due and punctual  payment of the  principal of (and
premium,  if any) and any interest  (including all Additional  Amounts,  if any,
payable  pursuant to Section 1007) on all of the Securities,  according to their
tenor,  and  the due  and  punctual  performance  and  observance  of all of the
covenants  and  conditions  of this  Indenture to be performed by the Company by
supplemental indenture,  complying with Article Nine hereof, satisfactory to the
Trustee,  executed  and  delivered to the Trustee by such  corporation  and (ii)
immediately   after  giving  effect  to  such   transaction   and  treating  any
indebtedness  which becomes an obligation of the Company or any  Subsidiary as a
result thereof as having been incurred by the Company or such  Subsidiary at the
time of such transaction,  no Event of Default, and no event which, after notice
or the lapse of time,  or both,  would  become an Event of  Default,  shall have
occurred and be continuing.

                  SECTION 802.  Rights and Duties of Successor  Corporation.  In
case of any such consolidation,  merger,  sale, lease or conveyance and upon any
such assumption by the successor  corporation,  such successor corporation shall
succeed to and be substituted for the Company, with the same effect as if it had
been  named  herein  as the  party  of  the  first  part,  and  the  predecessor
corporation,  except in the event of a lease,  shall be  relieved of any further
obligation under this Indenture and the Securities.  Such successor  corporation
thereupon may cause to be signed, and may issue either in its own name or in the
name of the Company, any or all of the Securities issuable

                                       39
<PAGE>

hereunder  which  theretofore  shall not have been  signed  by the  Company  and
delivered to the Trustee;  and,  upon the order of such  successor  corporation,
instead of the Company, and subject to all the terms, conditions and limitations
in this Indenture  prescribed,  the Trustee shall authenticate and shall deliver
any  Securities  which  previously  shall have been signed and  delivered by the
officers of the Company to the Trustee for  authentication,  and any  Securities
which  such  successor  corporation  thereafter  shall  cause to be  signed  and
delivered to the Trustee for that purpose. All the Securities so issued shall in
all respects  have the same legal rank and benefit  under this  Indenture as the
Securities theretofore or thereafter issued in accordance with the terms of this
Indenture  as though all of such  Securities  had been issued at the date of the
execution hereof.

                  In case of any  such  consolidation,  merger,  sale,  lease or
conveyance,  such changes in phraseology  and form (but not in substance) may be
made in the Securities thereafter to be issued as may be appropriate.

                  SECTION 803. Officers' Certificate and Opinion of Counsel. Any
consolidation,  merger, sale, lease or conveyance permitted under Section 801 is
also subject to the condition that the Trustee receive an Officers'  Certificate
and an Opinion of Counsel  to the effect  that any such  consolidation,  merger,
sale, lease or conveyance, and the assumption of the Company's obligations under
this  Indenture by any successor  corporation,  complies with the  provisions of
this Article and that all conditions  precedent  herein provided for relating to
such transaction have been complied with.

                                  ARTICLE NINE

                             SUPPLEMENTAL INDENTURES

                  SECTION  901.  Supplemental   Indentures  Without  Consent  of
Holders.  Without  the  consent of any Holders of  Securities  or  coupons,  the
Company, when authorized by or pursuant to a Board Resolution,  and the Trustee,
at any  time  and  from  time to time,  may  enter  into one or more  indentures
supplemental  hereto,  in  form  satisfactory  to the  Trustee,  for  any of the
following purposes:

                  (1) to  evidence  the  succession  of  another  Person  to the
         Company and the  assumption  by any such  successor of the covenants of
         the Company herein and in the Securities contained; or

                  (2) to add to the  covenants of the Company for the benefit of
         the Holders of all or any series of Securities  (and if such  covenants
         are to be for the  benefit  of less  than  all  series  of  Securities,
         stating that such covenants are expressly being included solely for the
         benefit  of such  series)  or to  surrender  any right or power  herein
         conferred upon the Company; or

                  (3) to add any additional Events of Default for the benefit of
         the Holders of all or any series of  Securities  (and if such Events of
         Default  are  to be  for  the  benefit  of  less  than  all  series  of
         Securities,  stating  that such Events of Default are  expressly  being
         included  solely for the benefit of such  series);  provided,  however,
         that  in  respect  of  any  such  additional  Events  of  Default  such
         supplemental  indenture  may provide for a  particular  period of grace
         after default  (which period may be shorter or longer than that allowed
         in the  case  of  other  defaults)  or  may  provide  for an  immediate
         enforcement  upon such default or may limit the  remedies  available to
         the Trustee  upon such default or may limit the right of the Holders of
         a majority in  aggregate  principal  amount of that or those  series of
         Securities  to which such  additional  Events of Default apply to waive
         such default; or

                  (4)  to add  to or  change  any  of  the  provisions  of  this
         Indenture to provide that Bearer  Securities  may be  registrable as to
         principal,  to change or eliminate any  restrictions  on the payment of
         principal of or any premium or interest on Bearer Securities, to permit
         Bearer  Securities to be issued in exchange for Registered  Securities,
         to  permit  Bearer  Securities  to be  issued in  exchange  for  Bearer
         Securities of other authorized denominations or to permit or facilitate
         the issuance of Securities in

                                       40
<PAGE>

         uncertificated form; provided, that any such action shall not adversely
         affect the  interests of the Holders of Securities of any series or any
         related coupons in any material respect; or

                  (5) to  change  or  eliminate  any of the  provisions  of this
         Indenture;  provided that any such change or  elimination  shall become
         effective  only when  there is no  Security  Outstanding  of any series
         created prior to the execution of such supplemental  indenture which is
         entitled to the benefit of such provision; or

                  (6) to secure the Securities; or

                  (7) to establish the form or terms of Securities of any series
         and any related coupons as permitted by Sections 201 and 301, including
         the provisions and procedures  relating to Securities  convertible into
         Common Shares or Preferred  Shares of the Company,  as the case may be;
         or

                  (8) to evidence and provide for the  acceptance of appointment
         hereunder by a successor  Trustee with respect to the Securities of one
         or more  series and to add to or change any of the  provisions  of this
         Indenture  as shall be  necessary  to  provide  for or  facilitate  the
         administration of the trusts hereunder by more than one Trustee; or

                  (9) to cure  any  ambiguity,  to  correct  or  supplement  any
         provision herein which may be defective or inconsistent  with any other
         provision  herein,  or to make any other  provisions  with  respect  to
         matters or questions  arising under this  Indenture  which shall not be
         inconsistent  with the  provisions  of this  Indenture;  provided  such
         provisions  shall not adversely  affect the interests of the Holders of
         Securities  of  any  series  or any  related  coupons  in any  material
         respect; or

                  (10) to supplement  any of the provisions of this Indenture to
         such  extent  as  shall  be  necessary  to  permit  or  facilitate  the
         defeasance  and  discharge  of any  series of  Securities  pursuant  to
         Sections  401,  1402 and 1403;  provided that any such action shall not
         adversely  affect the  interests of the Holders of  Securities  of such
         series and any related coupons or any other series of Securities in any
         material respect.

                  SECTION 902. Supplemental  Indentures with Consent of Holders.
With the consent of the Holders of not less than a majority in principal  amount
of all Outstanding Securities affected by such supplemental indenture, by Act of
said  Holders  delivered  to the  Company and the  Trustee,  the  Company,  when
authorized by or pursuant to a Board Resolution,  and the Trustee may enter into
an indenture  or  indentures  supplemental  hereto for the purpose of adding any
provisions to or changing in any manner or eliminating  any of the provisions of
this  Indenture  or of  modifying  in any manner  the  rights of the  Holders of
Securities and any related coupons under this Indenture; provided, however, that
no such supplemental  indenture shall, without the consent of the Holder of each
Outstanding Security affected thereby:

                  (1)  change  the  Stated  Maturity  of  the  principal  of (or
         premium, if any, on) or any installment of principal of or interest on,
         any  Security;  or reduce the principal  amount  thereof or the rate or
         amount of interest thereon or any Additional Amounts payable in respect
         thereof,  or any premium payable upon the redemption thereof, or change
         any  obligation of the Company to pay  Additional  Amounts  pursuant to
         Section 1007 (except as contemplated by Section 801(i) and permitted by
         Section  901(1)),  or reduce the amount of the principal of an Original
         Issue  Discount   Security  that  would  be  due  and  payable  upon  a
         declaration of acceleration of the Maturity thereof pursuant to Section
         502 or the amount  thereof  provable in bankruptcy  pursuant to Section
         504, or  adversely  affect any right of  repayment at the option of the
         Holder of any Security,  or change any Place of Payment  where,  or the
         currency or currencies, currency unit or units or composite currency or
         currencies  in which,  any  Security  or any  premium  or the  interest
         thereon  is  payable,  or impair  the right to  institute  suit for the
         enforcement of any such payment on or after the Stated Maturity thereof
         (or,  in the case of  redemption  or  repayment  at the  option  of the
         Holder,  on or after the Redemption  Date or the Repayment Date, as the
         case may be), or

                                       41
<PAGE>

                  (2)  reduce  the   percentage  in  principal   amount  of  the
         Outstanding  Securities of any series,  the consent of whose Holders is
         required for any such supplemental  indenture,  or the consent of whose
         Holders is  required  for any waiver  with  respect to such  series (or
         compliance  with  certain  provisions  of  this  Indenture  or  certain
         defaults  hereunder  and  their  consequences)  provided  for  in  this
         Indenture,  or reduce the  requirements  of Section  1504 for quorum or
         voting, or

                  (3) modify any of the provisions of this Section,  Section 513
         or Section 1008,  except to increase the required  percentage to effect
         such  action  or to  provide  that  certain  other  provisions  of this
         Indenture  cannot be  modified  or waived  without  the  consent of the
         Holder of each Outstanding Security affected thereby.

                  It shall not be  necessary  for any Act of Holders  under this
Section to approve the particular form of any proposed  supplemental  indenture,
but it shall be sufficient if such Act shall approve the substance thereof.

                  A  supplemental  indenture  which  changes or  eliminates  any
covenant or other  provision of this Indenture which has expressly been included
solely for the benefit of one or more particular series of Securities,  or which
modifies the rights of the Holders of  Securities of such series with respect to
such covenant or other provision, shall be deemed not to affect the rights under
this Indenture of the Holders of Securities of any other series.

                  SECTION  903.   Execution  of  Supplemental   Indentures.   In
executing,  or accepting  the  additional  trusts  created by, any  supplemental
indenture  permitted by this Article or the  modification  thereby of the trusts
created by this Indenture,  the Trustee shall be entitled to receive,  and shall
be fully  protected  in relying  upon,  an Opinion of Counsel  stating  that the
execution  of such  supplemental  indenture is  authorized  or permitted by this
Indenture.  The Trustee may, but shall not be obligated  to, enter into any such
supplemental  indenture  which  affects  the  Trustee's  own  rights,  duties or
immunities under this Indenture or otherwise.

                  SECTION  904.  Effect  of  Supplemental  Indentures.  Upon the
execution of any supplemental indenture under this Article, this Indenture shall
be modified in accordance therewith and such supplemental indenture shall form a
part  of this  Indenture  for all  purposes;  and  every  Holder  of  Securities
theretofore  or  thereafter  authenticated  and  delivered  hereunder and of any
coupon appertaining thereto shall be bound thereby.

                  SECTION  905.  Conformity  with  Trust  Indenture  Act.  Every
supplemental  indenture  executed  pursuant to this Article shall conform to the
requirements of the Trust Indenture Act as then in effect.

                  SECTION  906.   Reference  in   Securities   to   Supplemental
Indentures.  Securities  of any series  authenticated  and  delivered  after the
execution of any supplemental indenture pursuant to this Article may, and shall,
if required by the Trustee,  bear a notation in form  approved by the Trustee as
to any matter provided for in such supplemental  indenture. If the Company shall
so determine,  new  Securities  of any series so modified as to conform,  in the
opinion of the Trustee and the Company,  to any such supplemental  indenture may
be prepared and executed by the Company and  authenticated  and delivered by the
Trustee in exchange for Outstanding Securities of such series.

                                   ARTICLE TEN

                                    COVENANTS

                  SECTION 1001. Payment of Principal,  Premium, if any, Interest
and Additional Amounts.  The Company covenants and agrees for the benefit of the
Holders of each series of Securities  that it will duly and  punctually  pay the
principal of (and premium,  if any) and interest on and any  Additional  Amounts
payable in respect of the Securities of that series in accordance with the terms
of such  series  of  Securities,  any  coupons  appertaining  thereto  and  this
Indenture.  Unless  otherwise  specified  as  contemplated  by Section  301 with
respect to any series of  Securities,  any  interest  due on and any  Additional
Amounts  payable in respect of Bearer  Securities on or before  Maturity,  other
than Additional  Amounts, if any, payable as provided in Section 1007 in respect
of principal of (or

                                       42
<PAGE>

premium,  if any, on) such a Security,  shall be payable only upon  presentation
and  surrender  of the several  coupons for such  interest  installments  as are
evidenced  thereby as they severally  mature.  Unless  otherwise  specified with
respect to  Securities  of any series  pursuant to Section 301, at the option of
the Company,  all payments of principal  may be paid by check to the  registered
Holder of the  Registered  Security or other  person  entitled  thereto  against
surrender of such Security.

                  SECTION 1002.  Maintenance of Office or Agency.  If Securities
of a series are  issuable  only as  Registered  Securities,  the  Company  shall
maintain  in each Place of Payment  for any  series of  Securities  an office or
agency  where  Securities  of that series may be presented  or  surrendered  for
payment or conversion,  where  Securities of that series may be surrendered  for
registration  of transfer or exchange,  and where notices and demands to or upon
the Company in respect of the  Securities of that series and this  Indenture may
be served.  If  Securities  of a series are issuable as Bearer  Securities,  the
Company will maintain: (A) in the Borough of Manhattan, The City of New York, an
office or agency where any Registered Securities of that series may be presented
or  surrendered  for payment or conversion,  where any Registered  Securities of
that series may be surrendered for registration of transfer, where Securities of
that series may be  surrendered  for  exchange,  where notices and demands to or
upon the Company in respect of the  Securities of that series and this Indenture
may be served and where Bearer Securities of that series and related coupons may
be presented  or  surrendered  for payment or  conversion  in the  circumstances
described in the following  paragraph  (and not  otherwise);  (B) subject to any
laws or regulations  applicable  thereto,  in a Place of Payment for that series
which is located outside the United States, an office or agency where Securities
of that series and related  coupons may be presented and surrendered for payment
(including  payment of any  Additional  Amounts  payable on  Securities  of that
series pursuant to Section 1007) or conversion;  provided,  however, that if the
Securities  of that series are listed on the  Luxembourg  Stock  Exchange or any
other stock exchange  located  outside the United States and such stock exchange
shall so require, the Company will maintain a Paying Agent for the Securities of
that series in Luxembourg or any other required city located  outside the United
States,  as the case may be, so long as the Securities of that series are listed
on such exchange; and (C) subject to any laws or regulations applicable thereto,
in a Place of Payment  for that  series  located  outside  the United  States an
office  or  agency  where  any  Registered  Securities  of  that  series  may be
surrendered for registration of transfer, where Securities of that series may be
surrendered for exchange and where notices and demands to or upon the Company in
respect of the Securities of that series and this  Indenture may be served.  The
Company will give prompt written notice to the Trustee of the location,  and any
change in the  location,  of each  such  office  or  agency.  If at any time the
Company shall fail to maintain any such required  office or agency or shall fail
to furnish the Trustee with the address thereof, such presentations, surrenders,
notices and demands may be made or served at the  Corporate  Trust Office of the
Trustee,  except that Bearer  Securities of that series and the related  coupons
may  be  presented  and  surrendered  for  payment  (including  payment  of  any
Additional  Amounts  payable on Bearer  Securities  of that  series  pursuant to
Section 1007) or conversion at the offices  specified in the Security in London,
England,  and the Company hereby  appoints the same as its agent to receive such
respective  presentations,  surrenders,  notices  and  demands,  and the Company
hereby  appoints  the  Trustee  its  agent to  receive  all such  presentations,
surrenders, notices and demands.

                  Unless  otherwise  specified  with  respect to any  Securities
pursuant  to Section  301,  no payment of  principal,  premium or interest on or
Additional  Amounts in respect of Bearer  Securities shall be made at any office
or agency of the Company in the United  States or by check mailed to any address
in the United States or by transfer to an account maintained with a bank located
in the United States; provided, however, that, if the Securities of a series are
payable in Dollars,  payment of principal of and any premium and interest on any
Bearer Security  (including any Additional Amounts payable on Securities of such
series  pursuant to Section  1007) shall be made at the office of the  Company's
Paying  Agent in the City of Boston,  if (but only if) payment in Dollars of the
full amount of such principal,  premium,  interest or Additional Amounts, as the
case may be, at all offices or agencies outside the United States maintained for
such purpose by the Company in  accordance  with this  Indenture,  is illegal or
effectively precluded by exchange controls or other similar restrictions.

                  The Company may from time to time  designate one or more other
offices or agencies  where the Securities of one or more series may be presented
or  surrendered  for any or all of such  purposes,  and  may  from  time to time
rescind  such  designation;  provided,  however,  that  no such  designation  or
rescission shall in any manner

                                       43
<PAGE>

relieve  the  Company  of its  obligation  to  maintain  an  office or agency in
accordance  with the  requirements  set forth above for Securities of any series
for such purposes. The Company will give prompt written notice to the Trustee of
any such designation or rescission and of any change in the location of any such
other  office  or  agency.  Unless  otherwise  specified  with  respect  to  any
Securities  pursuant to Section 301 with respect to a series of Securities,  the
Company  hereby  designates  as a Place of Payment for each series of Securities
the  office  or agency  of the  Company  in the City of  Boston,  and  initially
appoints the Trustee at its Corporate  Trust Office as Paying Agent in such city
and as its agent to receive  all such  presentations,  surrenders,  notices  and
demands.

                  Unless  otherwise  specified  with  respect to any  Securities
pursuant to Section 302, if and so long as the  Securities of any series (i) are
denominated in a Foreign  Currency or (ii) may be payable in a Foreign  Currency
or so long as it is required under any other provision of this  Indenture,  then
the Company will maintain with respect to each such series of Securities,  or as
so required, at least one exchange rate agent.

                  SECTION  1003.  Money for  Securities  Payments  to Be Held in
Trust. If the Company shall at any time act as its own Paying Agent with respect
to any series of any  Securities and any related  coupons,  it will, by no later
than 11:00 am (Boston  time) on each due date of the  principal of (and premium,
if any),  or  interest  on or  Additional  Amounts  in  respect  of,  any of the
Securities  of that series,  segregate  and hold in trust for the benefit of the
Persons entitled  thereto a sum in the currency or currencies,  currency unit or
units or composite currency or currencies in which the Securities of such series
are  payable  (except as  otherwise  specified  pursuant  to Section 301 for the
Securities of such series) sufficient to pay the principal (and premium, if any)
or interest or Additional  Amounts so becoming due until such sums shall be paid
to such Persons or otherwise  disposed of as herein provided,  and will promptly
notify the Trustee of its action or failure so to act.

                  Whenever the Company  shall have one or more Paying Agents for
any series of Securities and any related coupons, it will, on or before each due
date of the  principal of (and  premium,  if any),  or interest on or Additional
Amounts in respect of, any  Securities  of that  series,  deposit  with a Paying
Agent a sum (in the currency or currencies,  currency unit or units or composite
currency or currencies described in the preceding  paragraph)  sufficient to pay
the  principal  (and  premium,  if any) or interest or  Additional  Amounts,  so
becoming  due,  such  sum to be held in trust  for the  benefit  of the  Persons
entitled  to such  principal,  premium or  interest  or  Additional  Amounts and
(unless such Paying Agent is the Trustee) the Company will  promptly  notify the
Trustee of its action or failure so to act.

                  The  Company  will  cause  each  Paying  Agent  other than the
Trustee to execute and deliver to the Trustee an instrument in which such Paying
Agent shall agree with the Trustee,  subject to the  provisions of this Section,
that such Paying Agent will

                           (1)  hold  all  sums  held by it for the  payment  of
         principal of (and  premium,  if any) or interest on Securities in trust
         for the benefit of the Persons  entitled  thereto until such sums shall
         be paid to such Persons or otherwise disposed of as herein provided;

                           (2) give the  Trustee  notice of any  default  by the
         Company (or any other obligor upon the Securities) in the making of any
         such payment of principal (and premium, if any) or interest; and

                           (3) at any time  during the  continuance  of any such
         default, upon the written request of the Trustee,  forthwith pay to the
         Trustee all sums so held in trust by such Paying Agent.

                  The Company may at any time,  for the purpose of obtaining the
satisfaction  and discharge of this Indenture or for any other purpose,  pay, or
by Company Order direct any Paying Agent to pay, to the Trustee all sums held in
trust by the Company or such Paying  Agent,  such sums to be held by the Trustee
upon the same  trusts as those upon which such sums were held by the  Company or
such Paying  Agent;  and,  upon such payment by any Paying Agent to the Trustee,
such Paying Agent shall be released from all further  liability  with respect to
such sums.

                                       44
<PAGE>

                  Except as otherwise  provided in the Securities of any series,
any money  deposited  with the Trustee or any Paying Agent,  or then held by the
Company,  in trust for the payment of the principal of (and premium,  if any) or
interest on, or any Additional Amounts in respect of, any Security of any series
and remaining  unclaimed  for two years after such  principal  (and premium,  if
any), interest or Additional Amounts has become due and payable shall be paid to
the  Company  upon  Company  Request or (if then held by the  Company)  shall be
discharged from such trust; and the Holder of such Security shall thereafter, as
an  unsecured  general  creditor,  look only to the  Company for payment of such
principal of (and premium,  if any) or interest on, or any Additional Amounts in
respect of, such Security,  without interest  thereon,  and all liability of the
Trustee or such Paying Agent with respect to such trust money, and all liability
of the Company as trustee  thereof,  shall thereupon cease;  provided,  however,
that the Trustee or such Paying  Agent,  before being  required to make any such
repayment,  may at the expense of the Company cause to be published  once, in an
Authorized Newspaper, notice that such money remains unclaimed and that, after a
date  specified  therein,  which shall not be less than 30 days from the date of
such  publication,  any unclaimed  balance of such money then  remaining will be
repaid to the Company.

                  SECTION 1004. Existence. Subject to Article Eight, the Company
will do or cause to be done all things  necessary  to preserve  and keep in full
force  and  effect  its  existence,   rights  (declaration  and  statutory)  and
franchises;  provided,  however,  that the  Company  shall  not be  required  to
preserve  any  right  or  franchise  if  the  Board  shall  determine  that  the
preservation  thereof is no longer  desirable  in the conduct of the business of
the Company.

                  SECTION 1005. Provision of Financial  Information.  Whether or
not the Company is subject to Section 13 or 15(d) of the Securities Exchange Act
of 1934,  as  amended,  the  Company  will,  to the extent  permitted  under the
Securities Exchange Act of 1934, as amended, file with the Commission the annual
reports, quarterly reports and other documents which the Company would have been
required to file with the  Commission  pursuant to such Section 13 or 15(d) (the
"Financial  Statements")  if the Company were so subject,  such  documents to be
filed with the  Commission on or prior to the  respective  dates (the  "Required
Filing  Dates") by which the  Company  would have been  required so to file such
documents if the Company were so subject.

                  The Company  will also in any event (x) within 15 days of each
Required  Filing Date (i)  transmit by mail to all  Holders,  as their names and
addresses appear in the Security  Register,  without cost to such Holders copies
of the annual  reports and  quarterly  reports which the Company would have been
required  to file with the  Commission  pursuant  to  Section 13 or 15(d) of the
Securities Exchange Act of 1934, as amended, if the Company were subject to such
Sections, and (ii) file with the Trustee copies of the annual reports, quarterly
reports and other  documents  which the Company would have been required to file
with the Commission  pursuant to Section 13 or 15(d) of the Securities  Exchange
Act of 1934, as amended, if the Company were subject to such Sections and (y) if
filing such documents by the Company with the Commission is not permitted  under
the Securities  Exchange Act of 1934, as amended,  promptly upon written request
and payment of the reasonable cost of duplication and delivery, supply copies of
such documents to any prospective Holder.

                  SECTION  1006.  Statement as to  Compliance.  The Company will
deliver to the  Trustee,  within 120 days after the end of each fiscal  year,  a
brief  certificate from the principal  executive  officer,  principal  financial
officer  or  principal  accounting  officer  as to his or her  knowledge  of the
Company's compliance with all conditions and covenants under this Indenture and,
in the event of any noncompliance,  specifying such noncompliance and the nature
and status thereof.  For purposes of this Section 1006, such compliance shall be
determined  without regard to any period of grace or requirement of notice under
this Indenture.

                  SECTION  1007.  Additional  Amounts.  If any  Securities  of a
series  provide for the payment of Additional  Amounts,  the Company will pay to
the Holder of any  Security  of such series or any coupon  appertaining  thereto
Additional  Amounts as may be specified as contemplated by Section 301. Whenever
in this  Indenture  there is  mentioned,  in any  context  except in the case of
Section  502(1),  the payment of the principal of or any premium or interest on,
or in respect of, any Security of any series or payment of any related coupon or
the net proceeds received on the sale or exchange of any Security of any series,
such  mention  shall be deemed to include  mention of the payment of  Additional
Amounts provided by the terms of such series established pursuant to Section 301
to

                                       45
<PAGE>

the extent that,  in such  context,  Additional  Amounts  are,  were or would be
payable in respect  thereof  pursuant to such terms and  express  mention of the
payment of Additional Amounts (if applicable) in any provisions hereof shall not
be construed as excluding  Additional  Amounts in those provisions  hereof where
such express mention is not made.

                  Except as otherwise  specified as contemplated by Section 301,
if the Securities of a series provide for the payment of Additional  Amounts, at
least 20 days  prior to the first  Interest  Payment  Date with  respect to that
series of Securities (or if the Securities of that series will not bear interest
prior to Maturity, the first day on which a payment of principal and any premium
is made),  and at least 10 days prior to each date of payment of  principal  and
any premium or interest if there has been any change with respect to the matters
set forth in the below-mentioned Officers' Certificate, the Company will furnish
the Trustee and the Company's  principal Paying Agent or Paying Agents, if other
than the Trustee, with an Officers' Certificate instructing the Trustee and such
Paying  Agent or Paying  Agents  whether  such  payment of  principal of and any
premium or interest on the Securities of that series shall be made to Holders of
Securities  of that  series or any  related  coupons  who are not United  States
persons without  withholding  for or on account of any tax,  assessment or other
governmental  charge  described  in the  Securities  of the series.  If any such
withholding shall be required,  then such Officers' Certificate shall specify by
country the  amount,  if any,  required to be withheld on such  payments to such
Holders of Securities of that series or related coupons and the Company will pay
to the Trustee or such Paying Agent the Additional Amounts required by the terms
of such  Securities.  In the event that the Trustee or any Paying Agent,  as the
case may be,  shall not so receive  the  above-mentioned  certificate,  then the
Trustee  or such  Paying  Agent  shall be  entitled  (i) to assume  that no such
withholding or deduction is required with respect to any payment of principal or
interest with respect to any Securities of a series or related  coupons until it
shall  have  received  a  certificate  advising  otherwise  and (ii) to make all
payments of principal and interest with respect to the Securities of a series or
related coupons without  withholding or deductions until otherwise advised.  The
Company covenants to indemnify the Trustee and any Paying Agent for, and to hold
them  harmless  against,  any loss,  liability  or expense  reasonably  incurred
without  negligence  or bad faith on their part arising out of or in  connection
with  actions  taken or omitted by any of them or in reliance  on any  Officers'
Certificate  furnished  pursuant to this Section or in reliance on the Company's
not furnishing such an Officers' Certificate.

                  SECTION  1008.  Waiver of Certain  Covenants.  The Company may
omit in any particular instance to comply with any term,  provision or condition
set  forth  in  Sections  1004 or 1005,  if  before  or after  the time for such
compliance  the  Holders  of at least a  majority  in  principal  amount  of all
outstanding Securities of such series, by Act of such Holders, either waive such
compliance in such instance or generally waive  compliance with such covenant or
condition,  but no such  waiver  shall  extend to or  affect  such  covenant  or
condition except to the extent so expressly waived, and, until such waiver shall
become  effective,  the obligations of the Company and the duties of the Trustee
in respect of any such term,  provision or condition  shall remain in full force
and effect.

                                 ARTICLE ELEVEN

                            REDEMPTION OF SECURITIES

                  SECTION  1101.  Applicability  of Article.  Securities  of any
series which are redeemable  before their Stated Maturity shall be redeemable in
accordance  with their terms and (except as otherwise  specified as contemplated
by Section 301 for Securities of any series) in accordance with this Article.

                  SECTION  1102.  Election  to Redeem;  Notice to  Trustee.  The
election  of the  Company  to redeem any  Securities  shall be  evidenced  by or
pursuant to a Board Resolution. In case of any redemption at the election of the
Company of less than all of the Securities of any series,  the Company shall, at
least 45 days prior to the giving of the notice of  redemption  in Section  1104
(unless a shorter  notice  shall be  satisfactory  to the  Trustee),  notify the
Trustee of such  Redemption  Date and of the  principal  amount of Securities of
such series to be redeemed. In the case of any redemption of Securities prior to
the expiration of any restriction on such redemption provided in the

                                       46
<PAGE>

terms of such  Securities  or elsewhere  in this  Indenture,  the Company  shall
furnish the Trustee with an Officers'  Certificate  evidencing  compliance  with
such restriction.

                  SECTION  1103.  Selection  by  Trustee  of  Securities  to  Be
Redeemed.  If less than all the  Securities of any series issued on the same day
with the same terms are to be redeemed, the particular Securities to be redeemed
shall be  selected  not more than 60 days  prior to the  Redemption  Date by the
Trustee, from the Outstanding Securities of such series issued on such date with
the same terms not  previously  called  for  redemption,  by such  method as the
Trustee shall deem fair and  appropriate and which may provide for the selection
for redemption of portions  (equal to the minimum  authorized  denomination  for
Securities  of that series or any integral  multiple  thereof) of the  principal
amount of  Securities of such series of a  denomination  larger than the minimum
authorized denomination for Securities of that series.

                  The Trustee shall promptly notify the Company and the Security
Registrar  (if other than  itself) in writing  of the  Securities  selected  for
redemption and, in the case of any Securities  selected for partial  redemption,
the principal amount thereof to be redeemed.

                  For  all  purposes  of  this  Indenture,  unless  the  context
otherwise  requires,  all  provisions  relating to the  redemption of Securities
shall  relate,  in the case of any Security  redeemed or to be redeemed  only in
part, to the portion of the principal  amount of such Security which has been or
is to be redeemed.

                  SECTION 1104. Notice of Redemption. Notice of redemption shall
be given in the manner  provided in Section 106 and as may be further  specified
in an indenture supplemental hereto, not less than 30 days nor more than 60 days
prior to the Redemption Date,  unless a shorter period is specified by the terms
of such series established pursuant to Section 301, to each Holder of Securities
to be redeemed, but failure to give such notice in the manner herein provided to
the Holder of any Security  designated  for redemption as a whole or in part, or
any defect in the notice to any such  Holder,  shall not affect the  validity of
the  proceedings  for the  redemption  of any other  such  Security  or  portion
thereof.

                  Any  notice  that  is  mailed  to the  Holders  of  Registered
Securities in the manner herein provided shall be conclusively  presumed to have
been duly given, whether or not such Holders receive such notice.

                  All notices of redemption shall state:

                  (1) the Redemption Date,

                  (2) the Redemption  Price,  accrued interest to the Redemption
         Date  payable as  provided  in Section  1106,  if any,  and  Additional
         Amounts, if any,

                  (3) if less than all Outstanding  Securities of any series are
         to be  redeemed,  the  identification  (and,  in the  case  of  partial
         redemption,  the  principal  amount)  of  the  particular  Security  or
         Securities to be redeemed,

                  (4) in case any  Security is to be redeemed in part only,  the
         notice which relates to such Security shall state that on and after the
         Redemption  Date,  upon  surrender  of such  Security,  the holder will
         receive,  without  charge,  a new Security or  Securities of authorized
         denominations for the principal amount thereof remaining unredeemed,

                  (5) that on the  Redemption  Date  the  Redemption  Price  and
         accrued  interest to the Redemption Date payable as provided in Section
         1106, if any, will become due and payable upon each such  Security,  or
         the portion thereof,  to be redeemed and, if applicable,  that interest
         thereon shall cease to accrue on and after said date,

                                       47
<PAGE>

                  (6) the Place or  Places of  Payment  where  such  Securities,
         together in the case of Bearer Securities with all coupons appertaining
         thereto,  if  any,  maturing  after  the  Redemption  Date,  are  to be
         surrendered for payment of the Redemption  Price and accrued  interest,
         if any, or for conversion,

                  (7) that the  redemption is for a sinking fund, if such is the
         case,

                  (8) that unless  otherwise  specified in such  notice,  Bearer
         Securities of any series,  if any,  surrendered  for redemption must be
         accompanied by all coupons  maturing  subsequent to the Redemption Date
         or the amount of any such  missing  coupon or coupons  will be deducted
         from the Redemption Price, unless security or indemnity satisfactory to
         the  Company,  the  Trustee  for such  series and any  Paying  Agent is
         furnished,

                  (9) if Bearer  Securities of any series are to be redeemed and
         any Registered Securities of such series are not to be redeemed, and if
         such Bearer  Securities may be exchanged for Registered  Securities not
         subject to redemption on this  Redemption  Date pursuant to Section 305
         or otherwise,  the last date,  as  determined by the Company,  on which
         such exchanges may be made,

                  (10) the CUSIP number of such Security, if any, and

                  (11) if applicable, that a Holder of Securities who desires to
         convert  Securities for redemption  must satisfy the  requirements  for
         conversion  contained in such Securities,  the then existing conversion
         price or rate,  and the date and time when the option to convert  shall
         expire.

                  Notice of redemption  of  Securities  to be redeemed  shall be
given by the Company or, at the  Company's  request,  by the Trustee in the name
and at the expense of the Company.

                  SECTION  1105.  Deposit of  Redemption  Price.  On or prior to
11:00 am (Boston time) on any  Redemption  Date,  the Company shall deposit with
the  Trustee  or with a Paying  Agent (or,  if the  Company is acting as its own
Paying  Agent,  which it may not do in the case of a sinking fund payment  under
Article  Twelve,  segregate  and hold in trust as provided  in Section  1003) an
amount  of  money  in the  currency  or  currencies,  currency  unit or units or
composite  currency or  currencies  in which the  Securities  of such series are
payable  (except  as  otherwise  specified  pursuant  to  Section  301  for  the
Securities  of  such  series)  sufficient  to  pay on the  Redemption  Date  the
Redemption  Price of, and  (except if the  Redemption  Date shall be an Interest
Payment Date) accrued  interest on, all the Securities or portions thereof which
are to be redeemed on that date.

                  SECTION 1106. Securities Payable on Redemption Date. Notice of
redemption  having been given as  aforesaid,  the  Securities  so to be redeemed
shall, on the Redemption  Date,  become due and payable at the Redemption  Price
therein  specified  in the  currency or  currencies,  currency  unit or units or
composite  currency or  currencies  in which the  Securities  of such series are
payable  (except  as  otherwise  specified  pursuant  to  Section  301  for  the
Securities  of such  series)  (together  with accrued  interest,  if any, to the
Redemption Date), and from and after such date (unless the Company shall default
in the payment of the Redemption  Price and accrued  interest)  such  Securities
shall, if the same were interest-bearing, cease to bear interest and the coupons
for such  interest  appertaining  to any Bearer  Securities  so to be  redeemed,
except to the extent provided  below,  shall be void. Upon surrender of any such
Security  for  redemption  in  accordance  with said notice,  together  with all
coupons, if any,  appertaining  thereto maturing after the Redemption Date, such
Security  shall be paid by the Company at the  Redemption  Price,  together with
accrued  interest,  if any, to the  Redemption  Date;  provided,  however,  that
installments  of interest on Bearer  Securities  whose Stated  Maturity is on or
prior to the  Redemption  Date  shall be  payable  only at an  office  or agency
located outside the United States (except as otherwise provided in Section 1002)
and,  unless  otherwise  specified as  contemplated  by Section  301,  only upon
presentation  and surrender of coupons for such interest;  and provided  further
that, except as otherwise  provided with respect to Securities  convertible into
Common Shares or Preferred  Shares of the Company,  installments  of interest on
Registered  Securities  whose Stated  Maturity is on or prior to the  Redemption
Date  shall  be  payable  to the  Holders  of  such  Securities,  or one or more
Predecessor

                                       48
<PAGE>

Securities,  registered as such at the close of business on the relevant  Record
Dates according to their terms and the provisions of Section 307.

                  If any Bearer Security surrendered for redemption shall not be
accompanied by all appurtenant  coupons maturing after the Redemption Date, such
Security may be paid after  deducting from the Redemption  Price an amount equal
to the face amount of all such missing coupons, or the surrender of such missing
coupon or  coupons  may be waived by the  Company  and the  Trustee  if there be
furnished to them such security or indemnity as they may require to save each of
them and any Paying Agent  harmless.  If thereafter  the Holder of such Security
shall  surrender to the Trustee or any Paying  Agent any such missing  coupon in
respect of which a  deduction  shall have been made from the  Redemption  Price,
such  Holder  shall be entitled  to receive  the amount so  deducted;  provided,
however, that interest represented by coupons shall be payable only at an office
or agency  located  outside the United States  (except as otherwise  provided in
Section 1002) and,  unless  otherwise  specified as contemplated by Section 301,
only upon presentation and surrender of those coupons.

                   If any Security  called for  redemption  shall not be so paid
upon  surrender  thereof for  redemption,  the principal  (and premium,  if any)
shall,  until paid,  bear interest from the Redemption Date at the rate borne by
the Security.

                  SECTION  1107.  Securities  Redeemed in Part.  Any  Registered
Security  which is to be redeemed  only in part  (pursuant to the  provisions of
this Article or of Article  Twelve) shall be  surrendered  at a Place of Payment
therefor (with,  if the Company or the Trustee so requires,  due endorsement by,
or a written  instrument of transfer in form satisfactory to the Company and the
Trustee duly executed by, the Holder thereof or his attorney duly  authorized in
writing) and the Company shall execute and the Trustee  shall  authenticate  and
deliver to the Holder of such Security  without service charge a new Security or
Securities of the same series,  of any authorized  denomination  as requested by
such Holder in  aggregate  principal  amount  equal to and in  exchange  for the
unredeemed portion of the principal of the Security so surrendered.

                                 ARTICLE TWELVE

                                  SINKING FUNDS

                  SECTION 1201. Applicability of Article. The provisions of this
Article shall be applicable to any sinking fund for the retirement of Securities
of a series  except as otherwise  specified as  contemplated  by Section 301 for
Securities of such series.

                  The minimum amount of any sinking fund payment provided for by
the terms of  Securities  of any series is herein  referred  to as a  "mandatory
sinking fund payment", and any payment in excess of such minimum amount provided
for by the terms of such  Securities  of any series is herein  referred to as an
"optional sinking fund payment".  If provided for by the terms of any Securities
of any series,  the cash amount of any  mandatory  sinking  fund  payment may be
subject to  reduction  as provided in Section  1202.  Each  sinking fund payment
shall be applied to the  redemption  of Securities of any series as provided for
by the terms of Securities of such series.

                  SECTION  1202.  Satisfaction  of Sinking  Fund  Payments  with
Securities. The Company may, in satisfaction of all or any part of any mandatory
sinking fund payment with  respect to the  Securities  of a series,  (1) deliver
Outstanding  Securities  of such series  (other than any  previously  called for
redemption)  together in the case of any Bearer  Securities  of such series with
all unmatured coupons  appertaining thereto and (2) apply as a credit Securities
of such series  which have been  redeemed  either at the election of the Company
pursuant to the terms of such Securities or through the application of permitted
optional  sinking fund  payments  pursuant to the terms of such  Securities,  as
provided  for by the terms of such  Securities,  or which  have  otherwise  been
acquired by the Company;  provided that such  Securities so delivered or applied
as a credit have not been  previously  so  credited.  Such  Securities  shall be
received  and  credited  for  such  purpose  by the  Trustee  at the  applicable
Redemption Price specified in such

                                       49
<PAGE>

Securities for redemption  through  operation of the sinking fund and the amount
of such mandatory sinking fund payment shall be reduced accordingly.

                  SECTION 1203.  Redemption of Securities  for Sinking Fund. Not
less than 60 days prior to each sinking fund payment date for  Securities of any
series,  the  Company  will  deliver  to the  Trustee an  Officers'  Certificate
specifying  the amount of the next  ensuing  mandatory  sinking fund payment for
that series pursuant to the terms of that series,  the portion thereof,  if any,
which is to be  satisfied  by payment  of cash in the  currency  or  currencies,
currency  unit or  units or  composite  currency  or  currencies  in  which  the
Securities of such series are payable (except as otherwise specified pursuant to
Section 301 for the Securities of such series) and the portion thereof,  if any,
which is to be satisfied by delivering  and crediting  Securities of that series
pursuant to Section 1202, and the optional  amount,  if any, to be added in cash
to the next ensuing mandatory sinking fund payment, and will also deliver to the
Trustee any  Securities  to be so  delivered  and  credited.  If such  Officers'
Certificate  shall  specify an  optional  amount to be added in cash to the next
ensuing mandatory sinking fund payment, the Company shall thereupon be obligated
to pay the amount  therein  specified.  Not less than 30 days  before  each such
sinking fund payment date the Trustee shall select the Securities to be redeemed
upon such sinking fund payment date in the manner  specified in Section 1103 and
cause  notice of the  redemption  thereof  to be given in the name of and at the
expense of the  Company in the manner  provided  in Section  1104.  Such  notice
having been duly given, the redemption of such Securities shall be made upon the
terms and in the manner stated in Sections 1106 and 1107.

                                ARTICLE THIRTEEN

                       REPAYMENT AT THE OPTION OF HOLDERS

                  SECTION   1301.   Applicability   of  Article.   Repayment  of
Securities of any series  before their Stated  Maturity at the option of Holders
thereof shall be made in accordance with the terms of such  Securities,  if any,
and  (except as  otherwise  specified  by the terms of such  series  established
pursuant to Section 301) in accordance with this Article.

                  SECTION  1302.  Repayment  of  Securities.  Securities  of any
series  subject to  repayment  in whole or in part at the option of the  Holders
thereof will,  unless  otherwise  provided in the terms of such  Securities,  be
repaid at a price equal to the principal amount thereof, together with interest,
if any,  thereon  accrued to the Repayment  Date specified in or pursuant to the
terms of such Securities.  The Company covenants that on or before the Repayment
Date it will deposit with the Trustee or with a Paying Agent (or, if the Company
is acting as its own Paying  Agent,  segregate  and hold in trust as provided in
Section 1003) an amount of money in the currency or currencies, currency unit or
units or composite currency or currencies in which the Securities of such series
are  payable  (except as  otherwise  specified  pursuant  to Section 301 for the
Securities of such series)  sufficient to pay the principal  (or, if so provided
by the terms of the Securities of any series, a percentage of the principal) of,
and (except if the  Repayment  Date shall be an Interest  Payment  Date) accrued
interest on, all the Securities or portions  thereof,  as the case may be, to be
repaid on such date.

                  SECTION  1303.  Exercise of Option.  Securities  of any series
subject  to  repayment  at the option of the  Holders  thereof  will  contain an
"Option to Elect Repayment" form on the reverse of such Securities. In order for
any Security to be repaid at the option of the Holder,  the Trustee must receive
at the Place of Payment therefor  specified in the terms of such Security (or at
such other place or places of which the  Company  shall from time to time notify
the Holders of such  Securities) not earlier than 60 days nor later than 30 days
prior to the  Repayment  Date (1) the Security so providing  for such  repayment
together with the "Option to Elect  Repayment"  form on the reverse thereof duly
completed by the Holder or by the Holder's  attorney duly  authorized in writing
or (2) a telegram,  telex, facsimile transmission or a letter from a member of a
national securities exchange, or the National Association of Securities Dealers,
Inc.  ("NASD"),  or a  commercial  bank or trust  company in the  United  States
setting  forth the name of the Holder of the Security,  the principal  amount of
the  Security,  the  principal  amount of the  Security to be repaid,  the CUSIP
number,  if any,  or a  description  of the tenor and terms of the  Security,  a
statement that the option to elect  repayment is being  exercised  thereby and a
guarantee that the Security to be repaid, together

                                       50
<PAGE>

with the duly completed form entitled "Option to Elect Repayment" on the reverse
of the  Security,  will be  received  by the  Trustee  not later  than the fifth
Business Day after the date of such telegram,  telex,  facsimile transmission or
letter; provided,  however, that such telegram, telex, facsimile transmission or
letter  shall only be effective if such  Security  and form duly  completed  are
received  by the  Trustee by such fifth  Business  Day.  If less than the entire
principal  amount of such Security is to be repaid in accordance  with the terms
of such  Security,  the  principal  amount of such  Security  to be  repaid,  in
increments of the minimum  denomination  for Securities of such series,  and the
denomination or  denominations of the Security or Securities to be issued to the
Holder for the portion of the principal amount of such Security surrendered that
is not to be repaid,  must be specified.  The  principal  amount of any security
providing for repayment at the option of the Holder thereof may not be repaid in
part if, following such repayment,  the unpaid principal amount of such Security
would be less than the minimum  authorized  denomination  of  Securities  of the
series of which such Security to be repaid is a part. Except as otherwise may be
provided by the terms of any Security  providing  for repayment at the option of
the Holder  thereof,  exercise of the  repayment  option by the Holder  shall be
irrevocable unless waived by the Company.

                  SECTION 1304. When Securities  Presented for Repayment  Become
Due and Payable.  If  Securities  of any series  providing  for repayment at the
option of the Holders  thereof shall have been  surrendered  as provided in this
Article and as provided  by or  pursuant to the terms of such  Securities,  such
Securities  or the  portions  thereof,  as the case may be, to be  repaid  shall
become due and payable and shall be paid by the  Company on the  Repayment  Date
therein  specified,  and on and after such  Repayment  Date  (unless the Company
shall  default in the payment of such  Securities on such  Repayment  Date) such
Securities shall, if the same were interest-bearing,  cease to bear interest and
the coupons for such  interest  appertaining  to any Bearer  Securities so to be
repaid,  except to the extent provided  below,  shall be void. Upon surrender of
any such  Security for repayment in accordance  with such  provisions,  together
with all coupons,  if any,  appertaining  thereto  maturing  after the Repayment
Date, the principal amount of such Security so to be repaid shall be paid by the
Company,  together  with  accrued  interest,  if  any,  to the  Repayment  Date;
provided,  however,  that coupons  whose  Stated  Maturity is on or prior to the
Repayment Date shall be payable only at an office or agency located  outside the
United  States  (except  as  otherwise  provided  in Section  1002) and,  unless
otherwise  specified  pursuant  to  Section  301,  only  upon  presentation  and
surrender of such coupons;  and provided further that, in the case of Registered
Securities,  installments  of interest,  if any, whose Stated  Maturity is on or
prior to the  Repayment  Date shall be payable  (but without  interest  thereon,
unless the Company shall default in the payment  thereof) to the Holders of such
Securities,  or one or more  Predecessor  Securities,  registered as such at the
close of business on the relevant  Record Dates according to their terms and the
provisions of Section 307.

                  If any Bearer Security  surrendered for repayment shall not be
accompanied by all appurtenant  coupons  maturing after the Repayment Date, such
Security  may be paid  after  deducting  from the  amount  payable  therefor  as
provided in Section  1302 an amount equal to the face amount of all such missing
coupons, or the surrender of such missing coupon or coupons may be waived by the
Company and the Trustee if there be furnished to them such security or indemnity
as they may  require  to save each of them and any  Paying  Agent  harmless.  If
thereafter  the Holder of such  Security  shall  surrender to the Trustee or any
Paying Agent any such missing coupon in respect of which a deduction  shall have
been made as provided in the preceding  sentence,  such Holder shall be entitled
to receive the amount so deducted;  provided, however, that interest represented
by coupons  shall be payable  only at an office or agency  located  outside  the
United  States  (except  as  otherwise  provided  in Section  1002) and,  unless
otherwise  specified as contemplated by Section 301, only upon  presentation and
surrender of those coupons.

                  If the  principal  amount  of  any  Security  surrendered  for
repayment shall not be so repaid upon surrender  thereof,  such principal amount
(together with interest,  if any, thereon accrued to such Repayment Date) shall,
until paid,  bear interest  from the  Repayment  Date at the rate of interest or
Yield to Maturity (in the case of Original Issue Discount  Securities) set forth
in such Security.

                  SECTION 1305. Securities Repaid in Part. Upon surrender of any
Registered  Security  which is to be  repaid in part  only,  the  Company  shall
execute and the  Trustee  shall  authenticate  and deliver to the Holder of such
Security,  without  service  charge  and at the  expense of the  Company,  a new
Registered Security or Securities

                                       51
<PAGE>


of the same series, of any authorized  denomination  specified by the Holder, in
an  aggregate  principal  amount equal to and in exchange for the portion of the
principal of such Security so surrendered which is not to be repaid.


                                ARTICLE FOURTEEN

                       DEFEASANCE AND COVENANT DEFEASANCE

                  SECTION 1401.  Applicability  of Article;  Company's Option to
Effect Defeasance or Covenant Defeasance. If, pursuant to Section 301, provision
is made for either or both of (a)  defeasance  of the  Securities of or within a
series under  Section 1402 or (b) covenant  defeasance  of the  Securities of or
within a series  under  Section  1403,  then the  provisions  of such Section or
Sections, as the case may be, together with the other provisions of this Article
(with such  modifications  thereto as may be  specified  pursuant to Section 301
with respect to any Securities),  shall be applicable to such Securities and any
coupons  appertaining  thereto,  and the  Company  may at its  option  by  Board
Resolution,  at any  time,  with  respect  to such  Securities  and any  coupons
appertaining thereto, elect to have Section 1402 (if applicable) or Section 1403
(if  applicable)  be  applied to such  Outstanding  Securities  and any  coupons
appertaining thereto upon compliance with the conditions set forth below in this
Article.

                  SECTION 1402.  Defeasance  and  Discharge.  Upon the Company's
exercise of the above  option  applicable  to this  Section  with respect to any
Securities  of or  within a  series,  the  Company  shall be deemed to have been
discharged from its obligations with respect to such Outstanding  Securities and
any coupons appertaining thereto on the date the conditions set forth in Section
1404  are  satisfied  (hereinafter,   "defeasance").   For  this  purpose,  such
defeasance  means that the Company  shall be deemed to have paid and  discharged
the entire  indebtedness  represented  by such  Outstanding  Securities  and any
coupons   appertaining   thereto,   which  shall  thereafter  be  deemed  to  be
"Outstanding"  only for the purposes of Section  1405 and the other  Sections of
this Indenture  referred to in clauses (A) and (B) below,  and to have satisfied
all of its other obligations under such Securities and any coupons  appertaining
thereto  and  this  Indenture   insofar  as  such  Securities  and  any  coupons
appertaining  thereto  are  concerned  (and the  Trustee,  at the expense of the
Company,  shall execute proper instruments  acknowledging the same),  except for
the  following  which shall  survive  until  otherwise  terminated or discharged
hereunder:  (A) the  rights of Holders of such  Outstanding  Securities  and any
coupons appertaining thereto to receive, solely from the trust fund described in
Section 1404 and as more fully set forth in such Section, payments in respect of
the principal of (and premium, if any) and interest,  if any, on such Securities
and any  coupons  appertaining  thereto  when  such  payments  are due,  (B) the
Company's  obligations  with respect to such Securities under Sections 305, 306,
1002 and 1003 and with respect to the payment of Additional  Amounts, if any, on
such Securities as contemplated by Section 1007, (C) the rights, powers, trusts,
duties and  immunities of the Trustee  hereunder and (D) this Article  Fourteen.
Subject to compliance with this Article  Fourteen,  the Company may exercise its
option under this Section notwithstanding the prior exercise of its option under
Section  1403 with  respect  to such  Securities  and any  coupons  appertaining
thereto.

                  SECTION 1403. Covenant Defeasance. Upon the Company's exercise
of the above option applicable to this Section with respect to any Securities of
or within a series,  the Company  shall be released from its  obligations  under
Sections  1004  and  1005  and,  if  specified  pursuant  to  Section  301,  its
obligations  under  any  other  covenant,   with  respect  to  such  Outstanding
Securities  and any  coupons  appertaining  thereto  on and  after  the date the
conditions  set forth in  Section  1404 are  satisfied  (hereinafter,  "covenant
defeasance"),  and such  Securities and any coupons  appertaining  thereto shall
thereafter be deemed to be not  "Outstanding" for the purposes of any direction,
waiver,  consent or declaration or Act of Holders (and the  consequences  of any
thereof) in connection with Sections 1004 and 1005 or such other  covenant,  but
shall continue to be deemed "Outstanding" for all other purposes hereunder.  For
this  purpose,  such  covenant  defeasance  means  that,  with  respect  to such
Outstanding  Securities and any coupons  appertaining  thereto,  the Company may
omit to  comply  with and  shall  have no  liability  in  respect  of any  term,
condition or  limitation  set forth in any such Section or such other  covenant,
whether directly or indirectly,  by reason of any reference  elsewhere herein to
any such  Section or such other  covenant or by reason of  reference in any such
Section or such other  covenant  to any other  provision  herein or in any other
document and such omission to comply shall not  constitute a default or an Event
of Default under Section 501(4) or 501(9) or otherwise, as the

                                       52
<PAGE>

case may be, but except as specified  above, the remainder of this Indenture and
such  Securities  and any  coupons  appertaining  thereto  shall  be  unaffected
thereby.

                  SECTION 1404. Conditions to Defeasance or Covenant Defeasance.
The following  shall be the conditions to application of Section 1402 or Section
1403 to any  Outstanding  Securities  of or  within  a  series  and any  coupons
appertaining thereto:

                           (a) The Company shall  irrevocably  have deposited or
         caused to be deposited with the Trustee (or another trustee  satisfying
         the  requirements  of Section  607 who shall  agree to comply  with the
         provisions of this Article Fourteen applicable to it) as trust funds in
         trust for the purpose of making the  following  payments,  specifically
         pledged as security  for, and  dedicated  solely to, the benefit of the
         Holders of such Securities and any coupons appertaining thereto, (1) an
         amount in such  currency,  currencies  or  currency  unit in which such
         Securities and any coupons  appertaining  thereto are then specified as
         payable at Stated  Maturity)  which  through the  scheduled  payment of
         principal  and  interest in respect  thereof in  accordance  with their
         terms will  provide,  not later than one day before the due date of any
         payment of principal of (and premium, if any) and interest,  if any, on
         such Securities and any coupons appertaining thereto, or (2) Government
         Obligations  applicable  to such  Securities  and coupons  appertaining
         thereto  (determined  on the  basis  of  the  currency,  currencies  or
         currency unit in which such Securities and coupons appertaining thereto
         are then  specified as payable at Stated  Maturity)  which  through the
         scheduled  payment of  principal  and  interest  in respect  thereof in
         accordance with their terms will provide, not later than one day before
         the due date of any payment of principal of (and  premium,  if any) and
         interest,  if any,  on such  Securities  and any  coupons  appertaining
         thereto, money in an amount, or (3) a combination thereof in an amount,
         sufficient,   in  the  opinion  of  a  nationally  recognized  firm  of
         independent  public  accountants  expressed in a written  certification
         thereof delivered to the Trustee, to pay and discharge, and which shall
         be applied by the  Trustee  (or other  qualifying  trustee)  to pay and
         discharge,  (i) the principal of (and premium, if any) and interest, if
         any,  on  such  Outstanding  Securities  and any  coupons  appertaining
         thereto on the Stated  Maturity of such  principal  or  installment  of
         principal or interest and (ii) any  mandatory  sinking fund payments or
         analogous  payments  applicable to such Outstanding  Securities and any
         coupons  appertaining thereto on the day on which such payments are due
         and payable in accordance  with the terms of this Indenture and of such
         Securities and any coupons appertaining thereto.

                           (b) Such defeasance or covenant  defeasance shall not
         result in a breach or violation of, or constitute a default under, this
         Indenture or any other  material  agreement or  instrument to which the
         Company is a party or by which it is bound.

                           (c) No Event of Default or event which with notice or
         lapse of time or both would  become an Event of Default with respect to
         such  Securities  and  any  coupons  appertaining  thereto  shall  have
         occurred and be continuing  on the date of such deposit or,  insofar as
         Sections 501(6) and 501(7) are concerned, at any time during the period
         ending  on the  91st  day  after  the date of such  deposit  (it  being
         understood that this condition shall not be deemed  satisfied until the
         expiration of such period).

                           (d) In the case of an election  under  Section  1402,
         the Company  shall have  delivered to the Trustee an Opinion of Counsel
         stating  that (i) the  Company  has  received  from,  or there has been
         published by, the Internal Revenue Service a ruling,  or (ii) since the
         date of  execution  of this  Indenture,  there has been a change in the
         applicable  Federal  income tax law, in either case to the effect that,
         and based thereon such opinion shall confirm that,  the Holders of such
         Outstanding  Securities and any coupons  appertaining  thereto will not
         recognize  income,  gain or loss for Federal  income tax  purposes as a
         result of such  defeasance and will be subject to Federal income tax on
         the same  amounts,  in the same  manner  and at the same times as would
         have been the case if such defeasance had not occurred.

                           (e) In the case of an election  under  Section  1403,
         the Company  shall have  delivered to the Trustee an Opinion of Counsel
         to the effect that the Holders of such Outstanding Securities and any

                                       53
<PAGE>

         coupons  appertaining  thereto will not recognize income,  gain or loss
         for Federal income tax purposes as a result of such covenant defeasance
         and will be subject to Federal  income tax on the same amounts,  in the
         same  manner  and at the same times as would have been the case if such
         covenant defeasance had not occurred.

                           (f) The Company  shall have  delivered to the Trustee
         an Officers'  Certificate and an Opinion of Counsel,  each stating that
         all conditions  precedent to the  defeasance  under Section 1402 or the
         covenant  defeasance  under Section 1403 (as the case may be) have been
         complied  with and an Opinion of Counsel to the effect  that either (i)
         as a result  of a  deposit  pursuant  to  subsection  (a) above and the
         related  exercise of the Company's option under Section 1402 or Section
         1403 (as the  case may be),  registration  is not  required  under  the
         Investment  Company  Act of 1940,  as  amended,  by the  Company,  with
         respect to the trust funds  representing such deposit or by the Trustee
         for such trust funds or (ii) all necessary registrations under said Act
         have been effected.

                           (g)  Notwithstanding  any  other  provisions  of this
         Section,  such defeasance or covenant  defeasance  shall be effected in
         compliance  with any  additional  or  substitute  terms,  conditions or
         limitations which may be imposed on the Company in connection therewith
         pursuant to Section 301.

                  SECTION 1405. Deposited Money and Government Obligations to Be
Held in Trust; Other Miscellaneous Provisions.  Subject to the provisions of the
last paragraph of Section 1003, all money and Government  Obligations  (or other
property as may be provided  pursuant to Section  301)  (including  the proceeds
thereof) deposited with the Trustee (or other qualifying  trustee,  collectively
for purposes of this Section 1405,  the  "Trustee")  pursuant to Section 1404 in
respect of any Outstanding Securities of any series and any coupons appertaining
thereto shall be held in trust and applied by the Trustee,  in  accordance  with
the provisions of such Securities and any coupons  appertaining thereto and this
Indenture,  to  the  payment,  either  directly  or  through  any  Paying  Agent
(including  the  Company  acting as its own  Paying  Agent) as the  Trustee  may
determine,  to the  Holders  of such  Securities  and any  coupons  appertaining
thereto of all sums due and to become due thereon in respect of  principal  (and
premium,  if any) and interest and  Additional  Amounts,  if any, but such money
need not be segregated from other funds except to the extent required by law.

                  Unless  otherwise  specified  with  respect  to  any  Security
pursuant to Section 301, if, after a deposit  referred to in Section 1404(a) has
been made,  (a) the Holder of a Security  in respect of which such  deposit  was
made is  entitled  to, and does,  elect  pursuant to Section 301 or the terms of
such Security to receive  payment in a currency or currency unit other than that
in which the  deposit  pursuant  to Section  1404(a) has been made in respect of
such  Security,  or (b) a Conversion  Event occurs in respect of the currency or
currency  unit in which the deposit  pursuant to Section  1404(a) has been made,
the  indebtedness  represented  by such  Security  and any coupons  appertaining
thereto  shall  be  deemed  to have  been,  and will be,  fully  discharged  and
satisfied  through the payment of the  principal of (and premium,  if any),  and
interest,  if any, on such  Security as the same becomes due out of the proceeds
yielded by converting  (from time to time as specified  below in the case of any
such  election)  the  amount or other  property  deposited  in  respect  of such
Security  into the  currency or  currency  unit in which such  Security  becomes
payable as a result of such election or Conversion Event based on the applicable
market  exchange rate for such currency or currency unit in effect on the second
Business Day prior to each payment  date,  in the case of such an election,  or,
the applicable market exchange rate in effect for such currency or currency unit
(as nearly as feasible), in the case of such Conversion Event.

                  The Company shall pay and  indemnify  the Trustee  against any
tax,  fee  or  other  charge  imposed  on or  assessed  against  the  Government
Obligations  deposited  pursuant to Section 1404 or the  principal  and interest
received in respect  thereof  other than any such tax, fee or other charge which
by law is for the account of the Holders of such Outstanding  Securities and any
coupons appertaining thereto.

                  Anything in this Article to the contrary notwithstanding,  the
Trustee  shall  deliver  or pay to the  Company  from time to time upon  Company
Request any money or Government Obligations (or other property and

                                       54
<PAGE>

any proceeds  therefrom)  held by it as provided in Section  1404 which,  in the
opinion  of a  nationally  recognized  firm of  independent  public  accountants
expressed in a written  certification  thereof delivered to the Trustee,  are in
excess of the amount  thereof  which would then be required to be  deposited  to
effect a defeasance or covenant  defeasance,  as applicable,  in accordance with
this Article.


                                 ARTICLE FIFTEEN

                        MEETINGS OF HOLDERS OF SECURITIES

                  SECTION  1501.  Purposes for Which  Meetings May Be Called.  A
meeting  of Holders  of  Securities  of any series may be called at any time and
from time to time  pursuant to this  Article to make,  give or take any request,
demand,  authorization,  direction,  notice,  consent,  waiver  or other  action
provided by this  Indenture to be made,  given or taken by Holders of Securities
of such series.

                  SECTION  1502.  Call,  Notice and Place of  Meetings.  (a) The
Trustee  may at any time call a meeting of Holders of  Securities  of any series
for any purpose  specified in Section  1501, to be held at such time and at such
place in the City of Boston, or in London as the Trustee shall determine. Notice
of every meeting of Holders of Securities of any series,  setting forth the time
and the place of such  meeting  and in general  terms the action  proposed to be
taken at such meeting,  shall be given,  in the manner  provided in Section 106,
not less than 21 nor more than 180 days prior to the date fixed for the meeting.

                  (b) In case  at any  time  the  Company,  pursuant  to a Board
Resolution,  or  the  Holders  of at  least  25%  in  principal  amount  of  the
Outstanding  Securities of any series shall have requested the Trustee to call a
meeting of the Holders of Securities of such series for any purpose specified in
Section 1501, by written request  setting forth in reasonable  detail the action
proposed to be taken at the  meeting,  and the  Trustee  shall not have made the
first  publication of the notice of such meeting within 21 days after receipt of
such request or shall not thereafter  proceed to cause the meeting to be held as
provided herein, then the Company or the Holders of Securities of such series in
the amount above  specified,  as the case may be, may determine the time and the
place in the City of  Boston,  or in London for such  meeting  and may call such
meeting for such purposes by giving notice thereof as provided in subsection (a)
of this Section.

                  SECTION  1503.  Persons  Entitled to Vote at  Meetings.  To be
entitled to vote at any meeting of Holders of Securities of any series, a Person
shall be (1) a Holder of one or more Outstanding  Securities of such series,  or
(2) a Person  appointed  by an  instrument  in  writing as proxy for a Holder or
Holders of one or more  Outstanding  Securities of such series by such Holder or
Holders. The only Persons who shall be entitled to be present or to speak at any
meeting of Holders of Securities of any series shall be the Persons  entitled to
vote at such meeting and their counsel,  any  representatives of the Trustee and
its counsel and any representatives of the Company and its counsel.

                  SECTION 1504.  Quorum;  Action. The Persons entitled to vote a
majority in principal  amount of the  Outstanding  Securities  of a series shall
constitute  a quorum  for a meeting of Holders  of  Securities  of such  series;
provided,  however,  that if any  action  is to be  taken at such  meeting  with
respect to a consent or waiver which this  Indenture  expressly  provides may be
given by the Holders of not less than a specified percentage in principal amount
of the  Outstanding  Securities of a series,  the Persons  entitled to vote such
specified  percentage in principal amount of the Outstanding  Securities of such
series shall  constitute a quorum.  In the absence of a quorum within 30 minutes
after the time appointed for any such meeting, the meeting shall, if convened at
the request of Holders of Securities of such series, be dissolved.  In any other
case  the  meeting  may be  adjourned  for a  period  of not  less  than 10 days
determined  by the  chairman of the  meeting  prior to the  adjournment  of such
meeting.  In the  absence  of a  quorum  at any  such  adjourned  meeting,  such
adjourned meeting may be further adjourned for a period of not less than 10 days
as determined by the chairman of the meeting  prior to the  adjournment  of such
adjourned  meeting.  Notice of the reconvening of any adjourned meeting shall be
given as provided in Section 1502(a), except that such

                                       55
<PAGE>

notice  need be given  only once not less  than  five days  prior to the date on
which the meeting is scheduled to be  reconvened.  Notice of the  reconvening of
any adjourned  meeting shall state expressly the percentage,  as provided above,
of the principal amount of the Outstanding Securities of such series which shall
constitute a quorum.

                  Except  as  limited  by  the  proviso  to  Section   902,  any
resolution  presented to a meeting or adjourned meeting duly reconvened at which
a quorum is present as aforesaid may be adopted by the  affirmative  vote of the
Holders of a majority in principal amount of the Outstanding  Securities of that
series;  provided,  however,  that,  except as limited by the proviso to Section
902,  any  resolution  with  respect  to  any  request,  demand,  authorization,
direction,  notice,  consent,  waiver  or  other  action  which  this  Indenture
expressly  provides  may be made,  given or taken by the  Holders of a specified
percentage,  which  is  less  than  a  majority,  in  principal  amount  of  the
Outstanding  Securities  of a series may be adopted at a meeting or an adjourned
meeting  duly  reconvened  and at which a quorum is present as  aforesaid by the
affirmative vote of the Holders of such specified percentage in principal amount
of the Outstanding Securities of that series.

                  Any  resolution  passed or  decision  taken at any  meeting of
Holders of Securities  of any series duly held in  accordance  with this Section
shall be binding on all the Holders of Securities of such series and the related
coupons, whether or not present or represented at the meeting.

                  Notwithstanding the foregoing provisions of this Section 1504,
if any action is to be taken at a meeting of Holders of Securities of any series
with respect to any request, demand, authorization,  direction, notice, consent,
waiver or other action that this Indenture expressly provides may be made, given
or taken by the Holders of a specified  percentage  in  principal  amount of all
Outstanding  Securities  affected thereby,  or of the Holders of such series and
one or more additional series:

                           (i)  there shall be no minimum quorum requirement for
         such meeting; and

                           (ii)  the   principal   amount  of  the   Outstanding
         Securities of such series that vote in favor of such  request,  demand,
         authorization, direction, notice, consent, waiver or other action shall
         be taken into  account in  determining  whether such  request,  demand,
         authorization,  direction,  notice, consent, waiver or other action has
         been made, given or taken under this Indenture.

                  SECTION  1505.  Determination  of Voting  Rights;  Conduct and
Adjournment of Meetings.  (a)  Notwithstanding any provisions of this Indenture,
the Trustee may make such  reasonable  regulations  as it may deem advisable for
any  meeting  of  Holders  of  Securities  of a series in regard to proof of the
holding of  Securities of such series and of the  appointment  of proxies and in
regard to the appointment and duties of inspectors of votes,  the submission and
examination  of proxies,  certificates  and other evidence of the right to vote,
and such other  matters  concerning  the conduct of the meeting as it shall deem
appropriate.  Except as otherwise permitted or required by any such regulations,
the holding of Securities shall be proved in the manner specified in Section 104
and the  appointment  of any proxy  shall be proved in the manner  specified  in
Section  104 or by  having  the  signature  of the  Person  executing  the proxy
witnessed or  guaranteed  by any trust  company,  bank or banker  authorized  by
Section 104 to certify to the holding of Bearer Securities. Such regulations may
provide that written instruments appointing proxies,  regular on their face, may
be presumed  valid and genuine  without  the proof  specified  in Section 104 or
other proof.

                  (b) The Trustee shall,  by an instrument in writing  appoint a
temporary chairman of the meeting,  unless the meeting shall have been called by
the Company or by Holders of Securities as provided in Section 1502(b), in which
case the Company or the Holders of Securities of the series calling the meeting,
as the case  may be,  shall in like  manner  appoint  a  temporary  chairman.  A
permanent chairman and a permanent  secretary of the meeting shall be elected by
vote of the  Persons  entitled  to vote a majority  in  principal  amount of the
Outstanding Securities of such series represented at the meeting.

                                       56
<PAGE>

                  (c) At any meeting each Holder of a Security of such series or
proxy  shall be entitled  to one vote for each  $1,000  principal  amount of the
Outstanding  Securities  of such series held or  represented  by him;  provided,
however,  that no vote shall be cast or counted at any meeting in respect of any
Security  challenged as not Outstanding and ruled by the chairman of the meeting
to be not Outstanding.  The chairman of the meeting shall have no right to vote,
except as a Holder of a Security of such series or proxy.

                  (d) Any  meeting of Holders of  Securities  of any series duly
called  pursuant to Section  1502 at which a quorum is present may be  adjourned
from time to time by Persons  entitled to vote a majority in principal amount of
the Outstanding  Securities of such series  represented at the meeting,  and the
meeting may be held as so adjourned without further notice.

                  SECTION 1506. Counting Votes and Recording Action of Meetings.
The vote upon any  resolution  submitted to any meeting of Holders of Securities
of any series  shall be by  written  ballots on which  shall be  subscribed  the
signatures   of  the  Holders  of   Securities   of  such  series  or  of  their
representatives  by proxy and the  principal  amounts and serial  numbers of the
Outstanding Securities of such series held or represented by them. The permanent
chairman of the meeting  shall  appoint two  inspectors of votes who shall count
all votes cast at the meeting for or against any  resolution  and who shall make
and file with the secretary of the meeting  their  verified  written  reports in
duplicate of all votes cast at the meeting. A record, at least in duplicate,  of
the  proceedings of each meeting of Holders of Securities of any Series shall be
prepared  by the  secretary  of the  meeting and there shall be attached to said
record the  original  reports of the  inspectors  of votes on any vote by ballot
taken  thereat and  affidavits  by one or more persons  having  knowledge of the
fact,  setting  forth a copy of the notice of the meeting and showing  that said
notice was given as provided in Section 1502 and, if  applicable,  Section 1504.
Each copy  shall be signed  and  verified  by the  affidavits  of the  permanent
chairman  and  secretary  of the meeting and one such copy shall be delivered to
the  Company  and another to the Trustee to be  preserved  by the  Trustee,  the
latter to have attached thereto the ballots voted at the meeting.  Any record so
signed and verified shall be conclusive evidence of the matters therein stated.

                                       57
<PAGE>

                  This Indenture may be executed in any number of  counterparts,
each of which when so executed  shall be deemed to be an original,  but all such
counterparts shall together constitute but one and the same Indenture.

                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Indenture  to be duly  executed,  and  their  respective  corporate  seals to be
hereunto affixed and attested, all as of the day and year first above written.

                                  HEALTH AND RETIREMENT PROPERTIES TRUST


                                  By:___________________________
                                     Title:
[SEAL]

Attest:


- ----------------------------
Title:


                                  ----------------------------


                                  By:___________________________
                                     Title:

[SEAL]
Attest:


- ----------------------------
Title:




                                       58
<PAGE>



[COMMONWEALTH/STATE] OF                              )
                                                     ) ss:
COUNTY OF                                            )

         On the ___________ day of  ______________,  199_,  before me personally
came  ______________________,  to me known,  who,  being by me duly  sworn,  did
depose  and say that  he/she  is the  ______________  of HEALTH  AND  RETIREMENT
PROPERTIES  TRUST,  one of the  persons  described  in and  which  executed  the
foregoing  instrument;  that he/she knows the seal of said trust;  that the seal
affixed to said  instrument is such seal; that it was so affixed by authority of
the Board of said trust,  and that he/she  signed  his/her  name thereto by like
authority.

[Notarial Seal]


                                                     -----------------------
                                                     Notary Public
                                                     COMMISSION EXPIRES




[COMMONWEALTH/STATE] OF                              )
                                                     ) ss:
COUNTY OF                                            )

                  On the ______ day of _____________, 199_, before me personally
came ________________,  to me known, who, being by me duly sworn, did depose and
say that he/she is a _________________ of _________________,  one of the persons
described in and which executed the foregoing instrument;  that he/she knows the
seal of said corporation; that the seal affixed to said instrument is such seal;
that  it was so  affixed  by  authority  of  the  Board  of  Directors  of  said
corporation, and that he/she signed his/her name thereto by likely authority.

[Notarial Seal]

                                                     ---------------------------
                                                     Notary Public
                                                     COMMISSION EXPIRES



                                       59
<PAGE>

                                    EXHIBIT A

                             FORMS OF CERTIFICATION


                                   EXHIBIT A-1

               FORM OF CERTIFICATE TO BE GIVEN BY PERSON ENTITLED
                TO RECEIVE BEARER SECURITY OR TO OBTAIN INTEREST
                       PAYABLE PRIOR TO THE EXCHANGE DATE


[Insert title or sufficient description of Securities to be delivered]

                  This is to certify that, as of the date hereof,  and except as
set forth below, the above-captioned  Securities held by you for our account (i)
are owned by person(s)  that are not citizens or residents of the United States,
domestic  partnerships,  domestic corporations or any estate or trust the income
of which is subject to United States federal income  taxation  regardless of its
source ("United States  person(s)"),  (ii) are owned by United States  person(s)
that are (a) foreign branches of United States financial institutions (financial
institutions,   as  defined  in  United  States  Treasury   Regulations  Section
2.165-12(c)(1)(v) are herein referred to as "financial institutions") purchasing
for their own account or for resale, or (b) United States person(s) who acquired
the Securities through foreign branches of United States financial  institutions
and who hold the Securities through such United States financial institutions on
the  date  hereof  (and in  either  case (a) or (b),  each  such  United  States
financial  institutions  hereby agrees,  on its own behalf or through its agent,
that you may advise Health and Rehabilitation Properties Trust or its agent that
such  financial  institutions  will  comply  with the  requirements  of  Section
165(j)(3)(A),  (B) or (C) of the United States Internal Revenue Code of 1986, as
amended, and the regulations thereunder), or (iii) are owned by United States or
foreign  financial  institution(s)  for purposes of resale during the restricted
period   (as   defined   in   United   States   Treasury   Regulations   Section
1.163-5(c)(1)(i)(D)(7),  and, in  addition,  if the owner is a United  States or
foreign financial  institutions  described in clause (iii) above (whether or not
also  described  in clause (i) or (ii)),  this is to further  certify  that such
financial  institutions  has not acquired the  Securities for purposes of resale
directly  or  indirectly  to a United  States  person or to a person  within the
United States or its possessions.

                  As used herein,  "United  States"  means the United  States of
America   (including  the  States  and  the  District  of  Columbia);   and  its
"possessions"  include  Puerto Rico, the U.S.  Virgin  Islands,  Guam,  American
Samoa, Wake Island and the Northern Mariana Islands.

                  We  undertake  to advise you  promptly  by tested  telex on or
prior to the date on which you intend to submit your  certification  relating to
the  above-captioned  Securities  held by you for our account in accordance with
your Operating  Procedures if any applicable  statement herein is not correct on
such date,  and in the absence of any such  notification  it may be assumed that
this certification applies as of such date.

                  This  certificate  excepts  and does  not  relate  to  (U.S.$)
_______________ of such interest in the above-captioned Securities in respect of
which we are not able to certify and as to which we  understand  an exchange for
an interest in a Permanent  Global  Security or an exchange  for and delivery of
definitive  Securities (or, if relevant,  collection of any interest)  cannot be
made until we do so certify.

                  We  understand  that  this  certificate  may  be  required  in
connection with certain tax legislation in the United States.  If administrative
or legal  proceedings  are commenced or threatened in connection with which this
certificate  is or would be relevant,  we  irrevocably  authorize you to produce
this certificate or a copy thereof to any interested party in such proceedings.



                                       A-1

<PAGE>



Dated:                   , 19

[To be dated no earlier than the 15th day prior
to (i) the Exchange Date or (ii) the relevant
Interest Payment Date occurring prior to the
Exchange Date, as applicable]

                                       [Name of Person Making Certification]



                                       (Authorized Signatory)
                                       Name:
                                       Title:



                                       A-2

<PAGE>

                                   EXHIBIT A-2

                  FORM OF CERTIFICATE TO BE GIVEN BY EUROCLEAR
                AND CEDEL S.A. IN CONNECTION WITH THE EXCHANGE OF
                 A PORTION OF A TEMPORARY GLOBAL SECURITY OR TO
               OBTAIN INTEREST PAYABLE PRIOR TO THE EXCHANGE DATE

                                   CERTIFICATE

[Insert title or sufficient description of Securities to be delivered]

                  This  is  to   certify   that,   based   solely   on   written
certifications  that  we  have  received  in  writing,  by  tested  telex  or by
electronic  transmission  from each of the persons  appearing  in our records as
persons  entitled  to a portion of the  principal  amount  set forth  below (our
"Member  Organizations")  substantially in the form attached  hereto,  as of the
date hereof,  [U.S.$) principal amount of the above-captioned  Securities (i) is
owned by person(s)  that are not  citizens or  residents  of the United  States,
domestic  partnerships,  domestic corporations or any estate or trust the income
of which is subject to United States Federal income  taxation  regardless of its
source ("United  States  person(s)"),  (ii) is owned by United States  person(s)
that are (a) foreign branches of United States financial institutions (financial
institutions, as defined in U.S. Treasury Regulations Section 1.165- 12(c)(1)(v)
are herein  referred to as "financial  institutions")  purchasing  for their own
account  or  for  resale,  or (b)  United  States  person(s)  who  acquired  the
Securities through foreign branches of United States financial  institutions and
who hold the Securities through such United States financial institutions on the
date  hereof (and in either case (a) or (b),  each such  financial  institutions
will comply with the  requirements  of Section  165(j)(3)(A),  (B) or (C) of the
Internal Revenue Code of 1986, as amended, and the regulations  thereunder),  or
(iii) is owned by United States or foreign financial institution(s) for purposes
of resale during the  restricted  period (as defined in United  States  Treasury
Regulations  Section  1.163-5(c)(2)(i)(D)(7)),  and, to the further effect, that
financial  institutions  described  in clause  (iii) above  (whether or not also
described in clause (i) or (ii)) have  certified that they have not acquired the
Securities  for purposes of resale  directly or  indirectly  to a United  States
person or to a person within the United States or its possessions.

                  As used herein,  "United  States"  means the United  States of
America   (including  the  States  and  the  District  of  Columbia);   and  its
"possessions"  include  Puerto Rico, the U.S.  Virgin  Islands,  Guam,  American
Samoa, Wake Island and the Northern Mariana Islands.

                  We  further  certify  that  (i) we are  not  making  available
herewith for exchange (or, if relevant,  collection of any interest) any portion
of the temporary  global Security  representing the  above-captioned  Securities
excepted in the  above-referenced  certificates of Member Organizations and (ii)
as of the date  hereof we have not  received  any  notification  from any of our
Member  Organizations  to the effect  that the  statements  made by such  Member
Organizations  with  respect to any portion of the part  submitted  herewith for
exchange  (or, if relevant,  collection  of any interest) are no longer true and
cannot be relied upon as of the date hereof.

                  We  understand   that  this   certification   is  required  in
connection with certain tax legislation in the United States.  If administrative
or legal  proceedings  are commenced or threatened in connection with which this
certificate  is or would be relevant,  we  irrevocably  authorize you to produce
this certificate or a copy thereof to any interested party in such proceedings.


Date:                19

[To be dated no earlier than the Exchange Date
or the relevant  Interest Payment Date occurring 
prior to the Exchange Date, as applicable]

                                                      

                                  [Morgan Guaranty Trust Company
                                    New York, Brussels Office,]
                                       as Operator of the Euroclear System
                                  [Cedel S.A.]


                                       A-3


                                                                  Exhibit 4.2



















                     HEALTH AND RETIREMENT PROPERTIES TRUST

                                       TO

                            ------------------------

                                     Trustee




                                    Indenture

                          Dated as of __________, 199_



                             Subordinated Debt Securities




<PAGE>





                               TABLE OF CONTENTS1

                                                                         PAGE

PARTIES.....................................................................1

RECITALS....................................................................1


                          ARTICLE ONE

    DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

SECTION 101.  Definitions...................................................1
              "Act"    .....................................................1
              "Additional Amounts"..........................................2
              "Affiliate"...................................................2
              "Authenticating Agent"........................................2
              "Authorized Newspaper"........................................2
              "Bankruptcy Law"..............................................2
              "Bearer Security".............................................2
              "Board"  .....................................................2
              "Board Resolution"............................................2
              "Business Day"................................................2
              "CEDEL"  .....................................................2
              "Commission"..................................................2
              "Common Depositary"...........................................2
              "Company".....................................................2
              "Company Request" and "Company Order".........................3
              "Conversion Event"............................................3
              "Corporate Trust Office"......................................3
              "corporation".................................................3
              "coupon" .....................................................3
              "Custodian"...................................................3
              "Declaration".................................................3
              "Defaulted Interest"..........................................3
              "Dollar" or "$"...............................................3
              "DTC"    .....................................................3
              "ECU"    .....................................................3
              "Euroclear"...................................................3
              "European Communities"........................................3
              "European Monetary System"....................................3
              "Event of Default"............................................3
              "Exchange Date"...............................................3
              "Foreign Currency"............................................3
              "Funds from Operations".......................................3
              "GAAP"   .....................................................4
              "Government Obligations"......................................4
              "Holder" .....................................................4
- --------
1        This Table of Contents shall not, for any purpose, be deemed to be
         part of this Indenture.

                                       -i-

<PAGE>



              "Indenture"...................................................4
              "Indexed Security"............................................4
              "interest"....................................................4
              "Interest Payment Date".......................................4
              "Maturity"....................................................4
              "Officers' Certificate".......................................5
              "Opinion of Counsel"..........................................5
              "Original Issue Discount Security"............................5
              "Outstanding".................................................5
              "Paying Agent"................................................6
              "Person" .....................................................6
              "Place of Payment"............................................6
              "Predecessor Security"........................................6
              "Redemption Date".............................................6
              "Redemption Price"............................................6
              "Registered Security".........................................6
              "Regular Record Date".........................................6
              "Repayment Date"..............................................6
              "Responsible Officer".........................................6
              "Security"....................................................6
              "Security Register" and "Security Registrar"..................7
              "Significant Subsidiary"......................................7
              "Special Record Date".........................................7
              "Stated Maturity".............................................7
              "Subsidiary"..................................................7
              "Trust Indenture Act" or "TIA"................................7
              "Trustee".....................................................7
              "United States"...............................................7
              "United States person"........................................7
              "Yield to Maturity"...........................................7
SECTION 102.  Compliance Certificates and Opinions..........................7
SECTION 103.  Form of Documents Delivered to Trustee........................8
SECTION 104.  Acts of Holders...............................................8
SECTION 105.  Notices, etc., to Trustee and Company.........................9
SECTION 106.  Notice to Holders; Waiver....................................10
SECTION 107.  Effect of Headings and Table of Contents.....................10
SECTION 108.  Successors and Assigns.......................................11
SECTION 109.  Separability Clause..........................................11
SECTION 110.  Benefits of Indenture........................................11
SECTION 111.  Governing Law................................................11
SECTION 112.  Legal Holidays...............................................11
SECTION 113.  No Personal Liability........................................11

                                   ARTICLE TWO

                                SECURITIES FORMS

SECTION 201.  Forms of Securities..........................................11
SECTION 202.  Form of Trustee's Certificate of Authentication..............12
SECTION 203.  Securities Issuable in Global Form...........................12


                                      -ii-

<PAGE>



                                  ARTICLE THREE

                                 THE SECURITIES

SECTION 301.  Amount Unlimited; Issuable in Series.........................13
SECTION 302.  Denominations................................................16
SECTION 303.  Execution, Authentication, Delivery and Dating...............16
SECTION 304.  Temporary Securities.........................................17
SECTION 305.  Registration, Registration of Transfer and Exchange..........19
SECTION 306.  Mutilated, Destroyed, Lost and Stolen Securities.............22
SECTION 307.  Payment of Interest; Interest Rights Preserved...............22
SECTION 308.  Persons Deemed Owners........................................24
SECTION 309.  Cancellation.................................................24
SECTION 310.  Computation of Interest......................................25

                                  ARTICLE FOUR

                           SATISFACTION AND DISCHARGE

SECTION 401.  Satisfaction and Discharge of Indenture......................25
SECTION 402.  Application of Trust Funds...................................26

                                  ARTICLE FIVE

                                    REMEDIES

SECTION 501.  Events of Default............................................26
SECTION 502.  Acceleration of Maturity; Rescission and Annulment...........28
SECTION 503.  Collection of Indebtedness and Suits for Enforcement 
                by Trustee.................................................28
SECTION 504.  Trustee May File Proofs of Claim.............................29
SECTION 505.  Trustee May Enforce Claims Without Possession of 
                Securities or Coupons......................................30
SECTION 506.  Application of Money Collected...............................30
SECTION 507.  Limitation on Suits..........................................30
SECTION 508.  Unconditional Right of Holders to Receive Principal, Premium,
                if any, Interest and Additional Amounts....................31
SECTION 509.  Restoration of Rights and Remedies...........................31
SECTION 510.  Rights and Remedies Cumulative...............................31
SECTION 511.  Delay or Omission Not Waiver.................................31
SECTION 512.  Control by Holders of Securities.............................31
SECTION 513.  Waiver of Past Defaults......................................32
SECTION 514.  Waiver of Usury, Stay or Extension Laws......................32
SECTION 515.  Undertaking for Costs........................................32

                                   ARTICLE SIX

                                   THE TRUSTEE

SECTION 601.  Notice of Defaults...........................................32
SECTION 602.  Certain Rights of Trustee....................................33
SECTION 603.  Not Responsible for Recitals or Issuance of Securities.......34
SECTION 604.  May Hold Securities..........................................34
SECTION 605.  Money Held in Trust..........................................34

                                      -iii-

<PAGE>



SECTION 606.  Compensation and Reimbursement...............................34
SECTION 607.  Corporate Trustee Required; Eligibility; Conflicting 
                Interests..................................................34
SECTION 608.  Resignation and Removal; Appointment of Successor............35
SECTION 609.  Acceptance of Appointment by Successor.......................36
SECTION 610.  Merger, Conversion, Consolidation or Succession to Business..36
SECTION 611.  Appointment of Authentication Agent..........................37

                                  ARTICLE SEVEN

                HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

SECTION 701.  Disclosure of Names and Addresses of Holders.................38
SECTION 702.  Reports by Trustee...........................................38
SECTION 703.  Reports by Company...........................................38
SECTION 704.  Company to Furnish to Trustee Names and Addresses of Holders.39

                                  ARTICLE EIGHT

                CONSOLIDATION, MERGER, SALE, LEASE OR CONVEYANCE

SECTION 801.  Consolidations and Mergers of Company and Sales, Leases 
               and Conveyances Permitted Subject to Certain Conditions.....39
SECTION 802.  Rights and Duties of Successor Corporation...................39
SECTION 803.  Officers' Certificate and Opinion of Counsel.................40

                                  ARTICLE NINE

                             SUPPLEMENTAL INDENTURES

SECTION 901.  Supplemental Indentures Without Consent of Holders...........40
SECTION 902.  Supplemental Indentures with Consent of Holders..............41
SECTION 903.  Execution of Supplemental Indentures.........................42
SECTION 904.  Effect of Supplemental Indentures............................42
SECTION 905.  Conformity with Trust Indenture Act..........................42
SECTION 906.  Reference in Securities to Supplemental Indentures...........42

                                   ARTICLE TEN

                                    COVENANTS

SECTION 1001.  Payment of Principal, Premium, if any, Interest and 
                  Additional Amounts.......................................42
SECTION 1003.  Money for Securities Payments to Be Held in Trust...........43
SECTION 1004.  Existence...................................................44
SECTION 1005.  Provision of Financial Information..........................45
SECTION 1006.  Statement as to Compliance..................................45
SECTION 1007.  Additional Amounts..........................................45
SECTION 1008.  Waiver of Certain Covenants.................................46


                                      -iv-

<PAGE>



                                 ARTICLE ELEVEN

                            REDEMPTION OF SECURITIES

SECTION 1101.  Applicability of Article....................................46
SECTION 1102.  Election to Redeem; Notice to Trustee.......................46
SECTION 1103.  Selection by Trustee of Securities to Be Redeemed...........47
SECTION 1104.  Notice of Redemption........................................47
SECTION 1105.  Deposit of Redemption Price.................................48
SECTION 1106.  Securities Payable on Redemption Date.......................48
SECTION 1107.  Securities Redeemed in Part.................................49

                                 ARTICLE TWELVE

                                  SINKING FUNDS

SECTION 1201.  Applicability of Article....................................49
SECTION 1202.  Satisfaction of Sinking Fund Payments with Securities.......49
SECTION 1203.  Redemption of Securities for Sinking Fund...................50

                                ARTICLE THIRTEEN

                       REPAYMENT AT THE OPTION OF HOLDERS

SECTION 1301.  Applicability of Article....................................50
SECTION 1302.  Repayment of Securities.....................................50
SECTION 1303.  Exercise of Option..........................................50
SECTION 1304.  When Securities Presented for Repayment Become Due 
                and Payable................................................51
SECTION 1305.  Securities Repaid in Part...................................51

                                ARTICLE FOURTEEN

                       DEFEASANCE AND COVENANT DEFEASANCE

SECTION 1401.  Applicability of Article; Company's Option to Effect 
                Defeasance or Covenant Defeasance..........................52
SECTION 1402.  Defeasance and Discharge....................................52
SECTION 1403.  Covenant Defeasance.........................................52
SECTION 1404.  Conditions to Defeasance or Covenant Defeasance.............53
SECTION 1405.  Deposited Money and Government Obligations to Be Held in 
                Trust; Other Miscellaneous Provisions......................54

                                 ARTICLE FIFTEEN

                        MEETINGS OF HOLDERS OF SECURITIES

SECTION 1501.  Purposes for Which Meetings May Be Called...................55
SECTION 1502.  Call, Notice and Place of Meetings..........................55
SECTION 1503.  Persons Entitled to Vote at Meetings........................55
SECTION 1504.  Quorum; Action..............................................55
SECTION 1505.  Determination of Voting Rights; Conduct and Adjournment 
                 of Meetings...............................................56
SECTION 1506.  Counting Votes and Recording Action of Meetings.............57

TESTIMONIUM................................................................
SIGNATURES AND SEALS.......................................................
ACKNOWLEDGMENTS............................................................
EXHIBIT A -- FORMS OF CERTIFICATION


                                      -v-

<PAGE>



                     HEALTH AND RETIREMENT PROPERTIES TRUST

         Reconciliation  and tie between Trust Indenture Act of 1939, as amended
(the "TIA"), and Indenture, dated as of __________, 199_.


               TIA Section                         Indenture Section
Sec. 310(a)(1)..........................                  607
        (a)(2)..........................                  607
        (b).............................               607, 608
Sec. 312(a).............................                  704
Sec. 312(c).............................                  701
Sec. 313(a).............................                  702
       (c)..............................                  702
Sec. 314(a).............................                 1006
       (a)(4)...........................                 1007
       (c)(1)...........................                  102
       (c)(2)...........................                  102
       (e)..............................                  102
Sec. 315(b).............................                  601
Sec. 316(a) (last sentence).............          101 ("Outstanding")
        (a)(1)(A).......................               502, 512
        (a)(1)(B).......................                  513
       (b)..............................                  508
Sec. 317(a)(1)..........................                  503
       (a)(2)...........................                  504
Sec. 318(a).............................                  111
       (c)..............................                  111

- -------------------

NOTE: This  reconciliation and tie shall not, for any purpose, be deemed to be a
part of the Indenture.

         Attention  should also be directed to Section  318(c) of the TIA, which
provides that the provisions of Sections 310 to and including 317 of the TIA are
a part of and  govern  every  qualified  indenture,  whether  or not  physically
contained therein.

                                      -vi-

<PAGE>




         INDENTURE, dated as of ___________, 199_, between HEALTH AND RETIREMENT
PROPERTIES  TRUST, a Maryland real estate investment trust  (hereinafter  called
the  "Company"),  having  its  principal  office at 400 Centre  Street,  Newton,
Massachusetts  02158  and,  _____________________________,   a  ___________,  as
Trustee  hereunder  (hereinafter  called  the  "Trustee"),  having  its  initial
Corporate Trust Office at ____________________________________.

                             RECITALS OF THE COMPANY

                  The Company  deems it necessary to issue from time to time for
lawful   purposes  its  unsecured  debt  securities   (hereinafter   called  the
"Securities") evidencing its unsecured indebtedness, and has duly authorized the
execution  and delivery of this  Indenture to provide for the issuance from time
to time of the Securities, unlimited as to principal amount, to bear interest at
the rates or formulas, to mature at such times and to have such other provisions
as shall be fixed as hereinafter provided.

                  This  Indenture  is  subject  to the  provisions  of the Trust
Indenture Act of 1939, as amended,  that are deemed to be incorporated into this
Indenture by such Act, and shall, to the extent applicable,  be governed by such
provisions.

                  All things  necessary to make this Indenture a valid agreement
of the Company, in accordance with its terms, have been done.

                  NOW, THEREFORE, THIS INDENTURE WITNESSETH:

                  For and in  consideration  of the premises and the purchase of
the Securities by the Holders thereof, it is mutually covenanted and agreed, for
the equal and  proportionate  benefit of all Holders of the  Securities  or of a
series thereof, as follows:

                                   ARTICLE ONE

             DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

                  SECTION 101. Definitions.  For all purposes of this Indenture,
except as otherwise expressly provided or unless the context otherwise requires:

                  (1) the  terms  defined  in this  Article  have  the  meanings
assigned  to  them  in this  Article,  and  include  the  plural  as well as the
singular;

                  (2) all other terms used herein  which are defined in the TIA,
either  directly or by reference  therein,  have the  meanings  assigned to them
therein, and the terms "cash transaction" and "self-liquidating  paper", as used
in TIA Section 311, shall have the meanings assigned to them in the rules of the
Commission adopted under the TIA;

                  (3) all accounting terms not otherwise defined herein have the
meanings assigned to them in accordance with GAAP; and

                  (4) the words  "herein",  "hereof" and  "hereunder"  and other
words of  similar  import  refer  to this  Indenture  as a whole  and not to any
particular Article, Section or other subdivision.

                  Certain terms,  used  principally  in Article  Three,  Article
Five, Article Six and Article Ten, are defined in those Articles.

                  "Act",  when used with respect to any Holder,  has the meaning
specified in Section 104.


                                                        

<PAGE>



                  "Additional  Amounts" means any  additional  amounts which are
required  by a  Security  or  by  or  pursuant  to  a  Board  Resolution,  under
circumstances specified therein, to be paid by the Company in respect of certain
taxes imposed on certain Holders and which are owing to such Holders.

                  "Affiliate"  of any  specified  Person  means any other Person
directly or indirectly  controlling or controlled by or under direct or indirect
common control with such specified Person.  For the purposes of this definition,
"control"  when used with  respect to any  specified  Person  means the power to
direct the  management  and  policies of such  Person,  directly or  indirectly,
whether  through the ownership of voting  securities,  by contract or otherwise;
and the terms  "controlling" and "controlled"  have meanings  correlative to the
foregoing.

                  "Authenticating   Agent"   means  any   authenticating   agent
appointed by the Trustee pursuant to Section 611.

                  "Authorized  Newspaper"  means  a  newspaper,  printed  in the
English  language  or in an official  language  of the  country of  publication,
customarily  published  on  each  Business  Day,  whether  or not  published  on
Saturdays,  Sundays or  holidays,  and of general  circulation  in each place in
connection  with which the term is used or in the  financial  community  of each
such  place.  Whenever  successive  publications  are  required  to be  made  in
Authorized Newspapers, the successive publications may be made in the same or in
different  Authorized   Newspapers  in  the  same  city  meeting  the  foregoing
requirements and in each case on any Business Day.

                  "Bankruptcy Law" has the meaning specified in Section 501.

                  "Bearer Security" means any Security  established  pursuant to
Section 201 which is payable to
bearer.

                  "Board"  means the board of  trustees  of the  Company  or any
committee of that board duly authorized to act hereunder.

                  "Board  Resolution" means a copy of a resolution  certified by
the Secretary or an Assistant Secretary of the Company to have been duly adopted
by  the  Board  and  to be in  full  force  and  effect  on  the  date  of  such
certification, and delivered to the Trustee.

                  "Business Day", when used with respect to any Place of Payment
or any  other  particular  location  referred  to in  this  Indenture  or in the
Securities,  means,  unless  otherwise  specified with respect to any Securities
pursuant  to Section  301,  any day,  other than a Saturday  or Sunday,  that is
neither a legal holiday nor a day on which banking institutions in that Place of
Payment or particular  location are authorized or required by law, regulation or
executive order to close.

                  "CEDEL" means CEDEL Bank, S.A., or its successor.

                  "Commission" means the Securities and Exchange Commission,  as
from time to time  constituted,  created  under the  Securities  Exchange Act of
1934, or, if at any time after  execution of this  instrument such Commission is
not  existing  and  performing  the  duties now  assigned  to it under the Trust
Indenture Act, then the body performing such duties on such date.

                  "Common Depositary" has the meaning specified in Section 304.

                  "Company" means the Person named as the "Company" in the first
paragraph of this Indenture until a successor shall have become such pursuant to
the applicable provisions of this Indenture, and thereafter "Company" shall mean
such successor.


                                        2

<PAGE>

                  "Company  Request" and "Company Order" mean,  respectively,  a
written request or order signed in the name of the Company by the President or a
Vice President,  and by its Treasurer, an Assistant Treasurer,  the Secretary or
an Assistant Secretary, of the Company, and delivered to the Trustee.

                  "Conversion Event" means the cessation of use of (i) a Foreign
Currency  both by the  government  of the country which issued such currency and
for the settlement of transactions by a central bank or other public institution
of or within the international  banking community,  (ii) the ECU both within the
European  Monetary  System  and for the  settlement  of  transactions  by public
institutions  of or within the European  Communities  or (iii) any currency unit
(or  composite  currency)  other than the ECU for the  purposes for which it was
established.

                  "Corporate  Trust  Office"  means the office of the Trustee at
which, at any particular time, its corporate trust business shall be principally
administered, which office at the date hereof is located at _____________.

                  "corporation" includes corporations,  associations,  companies
and business trusts.

                  "coupon" means any interest  coupon  appertaining  to a Bearer
Security.

                  "Custodian" has the meaning specified in Section 501.

                  "Declaration" has the meaning specified in Section 113.

                  "Defaulted Interest" has the meaning specified in Section 307.

                  "Dollar"  or "$"  means a dollar or other  equivalent  unit in
such coin or  currency  of the United  States of America as at the time shall be
legal tender for the payment of public and private debts.

                  "DTC" means The  Depository  Trust  Company,  or any successor
thereto.

                  "ECU" means the European  Currency Unit as defined and revised
from time to time by the Council of the European Communities.

                  "Euroclear"  means Morgan  Guaranty Trust Company of New York,
Brussels Office, or its successor as operator of the Euroclear System.

                  "European  Communities" means the European Economic Community,
the European Coal and Steel Community and the European Atomic Energy Community.

                  "European  Monetary System" means the European Monetary System
established by the Resolution of December 5, 1978 of the Council of the European
Communities.

                  "Event of Default" has the meaning specified in Article Five.

                  "Exchange Date" has the meaning specified in Section 304.

                  "Foreign  Currency"  means  any  currency,  currency  unit  or
composite  currency,  including,  without  limitation,  the ECU,  issued  by the
government of one or more  countries  other than the United States of America or
by any recognized confederation or association of such governments.

                  "Funds from  Operations" for any period means the consolidated
net income of the Company and its  Subsidiaries  for such period  without giving
effect to  depreciation  and  amortization,  gains or losses from  extraordinary
items,  gains or losses on sales of real estate,  gains or losses on investments
in marketable securities

                                        3

<PAGE>

and any  provision/benefit  for income  taxes for such  period,  plus funds from
operations of  unconsolidated  joint  ventures,  all  determined on a consistent
basis in accordance with GAAP.

                  "GAAP"  means  generally  accepted  accounting  principles  in
effect from time to time as used in the United  States  applied on a  consistent
basis.

                  "Government Obligations" means securities which are (i) direct
obligations of the United States of America or the  government  which issued the
Foreign Currency in which the Securities of a particular series are payable, for
the payment of which its full faith and credit is pledged or (ii) obligations of
a Person controlled or supervised by and acting as an agency or  instrumentality
of the United  States of America or such  government  which  issued the  Foreign
Currency  in which the  Securities  of such series are  payable,  the payment of
which is unconditionally guaranteed as a full faith and credit obligation by the
United States of America or such other  government,  which,  in either case, are
not callable or redeemable at the option of the issuer  thereof,  and shall also
include a depository receipt issued by a bank or trust company as custodian with
respect to any such Government  Obligation or a specific  payment of interest on
or principal of any such  Government  Obligation  held by such custodian for the
account of the holder of a depository receipt; provided that (except as required
by law) such  custodian is not  authorized to make any deduction from the amount
payable to the holder of such depository receipt from any amount received by the
custodian in respect of the  Government  Obligation  or the specific  payment of
interest  on or  principal  of  the  Government  Obligation  evidenced  by  such
depository receipt.

                  "Holder"  means,  in the case of a  Registered  Security,  the
Person in whose name a Security is registered  in the Security  Register and, in
the case of a Bearer Security, the bearer thereof and, when used with respect to
any coupon, shall mean the bearer thereof.

                  "Indenture" means this instrument as originally executed or as
it may from time to time be  supplemented  or amended by one or more  indentures
supplemental  hereto entered into pursuant to the applicable  provisions hereof,
and shall include the terms of particular  series of Securities  established  as
contemplated by Section 301; provided,  however,  that, if at any time more than
one Person is acting as Trustee under this instrument,  "Indenture"  shall mean,
with  respect to any one or more series of  Securities  for which such Person is
Trustee,  this instrument as originally  executed or as it may from time to time
be supplemented or amended by one or more applicable provisions hereof and shall
include the terms of the or those particular series of Securities for which such
Person is  Trustee  established  as  contemplated  by  Section  301,  exclusive,
however,  of any  provisions  or terms which  relate  solely to other  series of
Securities  for which such Person is Trustee,  regardless  of when such terms or
provisions  were adopted,  and  exclusive of any  provisions or terms adopted by
means of one or more indentures supplemental hereto executed and delivered after
such Person had become such Trustee but to which such Person,  as such  Trustee,
was not a party.

                  "Indexed Security" means a Security the terms of which provide
that the principal amount thereof payable at Stated Maturity may be more or less
than the principal face amount thereof at original issuance.

                  "interest",  when  used  with  respect  to an  Original  Issue
Discount  Security which by its terms bears interest only after Maturity,  shall
mean interest payable after Maturity,  and, when used with respect to a Security
which provides for the payment of Additional  Amounts  pursuant to Section 1007,
includes such Additional Amounts.

                  "Interest  Payment  Date",  when  used  with  respect  to  any
Security,  means the Stated  Maturity  of an  installment  of  interest  on such
Security.

                  "Maturity",  when used with respect to any Security, means the
date on which the  principal  of such  Security or an  installment  of principal
becomes  due and  payable as therein or herein  provided,  whether at the Stated
Maturity or by declaration  of  acceleration,  notice of  redemption,  notice of
option to elect repayment or otherwise.


                                        4
<PAGE>

                  "Officers'  Certificate"  means a  certificate  signed  by the
President or a Vice President and by the Treasurer, an Assistant Treasurer,  the
Secretary  or an  Assistant  Secretary  of the  Company,  and  delivered  to the
Trustee.

                  "Opinion of Counsel" means a written  opinion of counsel,  who
may be counsel  for the  Company  (including  counsel  who is an employee of the
Company) and who shall be acceptable to the Trustee.

                  "Original  Issue Discount  Security"  means any Security which
provides  for an amount  less than the  principal  amount  thereof to be due and
payable upon a declaration of acceleration of the Maturity  thereof  pursuant to
Section 502.

                  "Outstanding", when used with respect to Securities, means, as
of the date of  determination,  all  Securities  theretofore  authenticated  and
delivered under this Indenture, except:

                  (i)  Securities   theretofore  cancelled  by  the  Trustee  or
delivered to the Trustee for cancellation;

                  (ii)  Securities,  or portions  thereof,  for whose payment or
redemption  or  repayment  at the  option of the Holder  money in the  necessary
amount has been  theretofore  deposited  with the  Trustee  or any Paying  Agent
(other than the  Company) in trust or set aside and  segregated  in trust by the
Company  (if the Company  shall act as its own Paying  Agent) for the Holders of
such  Securities and any coupons  appertaining  thereto;  provided that, if such
Securities  are to be redeemed,  notice of such  redemption  has been duly given
pursuant to this Indenture or provision therefor satisfactory to the Trustee has
been made;

                  (iii)  Securities,  except to the extent  provided in Sections
1402 and 1403, with respect to which the Company has effected  defeasance and/or
covenant defeasance as provided in Article Fourteen;

                  (iv)  Securities  which have been paid pursuant to Section 306
or in exchange for or in lieu of which other Securities have been  authenticated
and  delivered  pursuant to this  Indenture,  other than any such  Securities in
respect  of  which  there  shall  have  been  presented  to  the  Trustee  proof
satisfactory  to it that such  Securities  are held by a bona fide  purchaser in
whose hands such Securities are valid obligations of the Company; and

                  (v) Securities converted into Common Shares,  Preferred Shares
or other  securities  of the  Company  pursuant  to or in  accordance  with this
Indenture if the terms of such Securities provide for convertibility pursuant to
Section 301;

provided,  however,  that in  determining  whether the Holders of the  requisite
principal amount of the Outstanding  Securities have given any request,  demand,
authorization,  direction, notice, consent or waiver hereunder or are present at
a meeting of  Holders  for quorum  purposes,  and for the  purpose of making the
calculations  required  by TIA  Section  313,  (i) the  principal  amount  of an
Original   Issue   Discount   Security  that  may  be  counted  in  making  such
determination or calculation and that shall be deemed to be Outstanding for such
purpose  shall be equal to the  amount of  principal  thereof  that would be (or
shall  have  been  declared  to be)  due  and  payable,  at  the  time  of  such
determination,  upon a  declaration  of  acceleration  of the  maturity  thereof
pursuant to Section 502, (ii) the principal  amount of any Security  denominated
in a Foreign  Currency  that may be  counted  in making  such  determination  or
calculation and that shall be deemed Outstanding for such purpose shall be equal
to the Dollar equivalent, determined pursuant to Section 301 as of the date such
Security is originally  issued by the Company,  of the principal  amount (or, in
the case of an Original Issue  Discount  Security,  the Dollar  equivalent as of
such date of original  issuance of the amount  determined  as provided in clause
(i) above) of such Security,  (iii) the principal amount of any Indexed Security
that may be counted in making such  determination  or calculation and that shall
be deemed  outstanding  for such purpose  shall be equal to the  principal  face
amount of such Indexed Security at original issuance,  unless otherwise provided
with respect to such Security pursuant to Section 301, and (iv) Securities owned
by the Company or any other obligor upon the  Securities or any Affiliate of the
Company  or of such  other  obligor  shall be  disregarded  and deemed not to be
Outstanding,  except that, in determining whether the Trustee shall be protected
in making such

                                        5
<PAGE>

calculation  or  in  relying  upon  any  such  request,  demand,  authorization,
direction, notice, consent or waiver, only Securities which the Trustee knows to
be so owned shall be so disregarded. Securities so owned which have been pledged
in good faith may be regarded as Outstanding  if the pledgee  establishes to the
satisfaction  of the Trustee the pledgee's  right so to act with respect to such
Securities and that the pledgee is not the Company or any other obligor upon the
Securities or any Affiliate of the Company or of such other obligor.

                  "Paying  Agent" means any Person  authorized by the Company to
pay the  principal of (and  premium,  if any) or interest on any  Securities  or
coupons on behalf of the Company.

                  "Person" means any individual, corporation, partnership, joint
venture,  association,  joint-stock  company,  trust, limited liability company,
unincorporated organization or government or any agency or political subdivision
thereof.

                  "Place of Payment",  when used with respect to the  Securities
of or within any series,  means the place or places where the  principal of (and
premium,  if any) and  interest on such  Securities  are payable as specified as
contemplated by Sections 301 and 1002.

                  "Predecessor  Security" of any particular Security means every
previous Security evidencing all or a portion of the same debt as that evidenced
by such  particular  Security;  and,  for the purposes of this  definition,  any
Security  authenticated  and  delivered  under Section 306 in exchange for or in
lieu of a mutilated, destroyed, lost or stolen Security or a Security to which a
mutilated,  destroyed,  lost or  stolen  coupon  appertains  shall be  deemed to
evidence the same debt as the mutilated,  destroyed,  lost or stolen Security or
the  Security  to  which  the  mutilated,   destroyed,  lost  or  stolen  coupon
appertains.

                  "Redemption  Date",  when used with respect to any Security to
be redeemed, in whole or in part, means the date fixed for such redemption by or
pursuant to this Indenture.

                  "Redemption  Price", when used with respect to any Security to
be  redeemed,  means the price at which it is to be  redeemed  pursuant  to this
Indenture.

                  "Registered  Security"  shall  mean any  Security  established
pursuant to Section 201 which is registered in the Security Register.

                  "Regular Record Date" for the interest payable on any Interest
Payment Date on the Registered Securities of or within any series means the date
specified  for that purpose as  contemplated  by Section  301,  whether or not a
Business Day.

                  "Repayment Date" means, when used with respect to any Security
to be repaid at the option of the Holder,  the date fixed for such  repayment by
or pursuant to this Indenture.

                  "Responsible Officer",  when used with respect to the Trustee,
means the chairman or vice-chairman  of the board of directors,  the chairman or
vice-chairman  of  the  executive  committee  of the  board  of  directors,  the
president,  any vice president  (whether or not designated by a number or a word
or words added before or after the title "vice president"),  the secretary,  any
assistant secretary,  the treasurer,  any assistant treasurer,  the cashier, any
assistant cashier, any trust officer, the controller or any other officer of the
Trustee  customarily  performing  functions similar to those performed by any of
the above  designated  officers  and also  means with  respect  to a  particular
corporate  trust  matter,  any other  officer  to whom such  matter is  referred
because of such officer's knowledge and familiarity with the particular subject.

                  "Security" has the meaning stated in the first recital of this
Indenture and, more particularly, means any Security or Securities authenticated
and delivered  under this  Indenture;  provided,  however,  that, if at any time
there  is  more  than  one  Person  acting  as  Trustee  under  this  Indenture,
"Securities" with respect to the Indenture as

                                        6
<PAGE>

to which such  Person is  Trustee  shall  have the  meaning  stated in the first
recital  of  this  Indenture  and  shall  more   particularly   mean  Securities
authenticated  and  delivered  under  this  Indenture,  exclusive,  however,  of
Securities of any series as to which such Person is not Trustee.

                  "Security   Register"  and  "Security   Registrar"   have  the
respective meanings specified in Section 305.

                  "Significant  Subsidiary"  means  any  Subsidiary  which  is a
"significant  subsidiary" (as defined in Article I, Rule 1-02 of Regulation S-X,
promulgated under the Securities Act of 1933, as amended) of the Company.

                  "Special  Record  Date"  for  the  payment  of  any  Defaulted
Interest on the Registered Securities of or within any series means a date fixed
by the Trustee pursuant to Section 307.

                  "Stated  Maturity",  when used with respect to any Security or
any  installment  of  principal  thereof  or  interest  thereon,  means the date
specified in such Security or a coupon representing such installment of interest
as the fixed date on which the principal of such Security or such installment of
principal or interest is due and payable.

                  "Subsidiary" means a corporation a majority of the outstanding
voting stock of which is owned, directly or indirectly, by the Company or by one
or more other Subsidiaries of the Company.  For the purposes of this definition,
"voting  stock" means stock having  voting power for the election of  directors,
whether at all times or only so long as no senior class of stock has such voting
power by reason of any contingency.

                  "Trust  Indenture Act" or "TIA" means the Trust  Indenture Act
of 1939,  as amended and as in force at the date as of which this  Indenture was
executed, except as provided in Section 905.

                  "Trustee" means the Person named as the "Trustee" in the first
paragraph of this  Indenture  until a successor  Trustee  shall have become such
pursuant  to  the  applicable  provisions  of  this  Indenture,  and  thereafter
"Trustee"  shall mean or include  each  Person who is then a Trustee  hereunder;
provided,  however,  that if at any  time  there is more  than one such  Person,
"Trustee" as used with respect to the  Securities  of any series shall mean only
the Trustee with respect to Securities of that series.

                  "United States" means, unless otherwise specified with respect
to any  Securities  pursuant  to  Section  301,  the  United  States of  America
(including  the states and the  District  of  Columbia),  its  territories,  its
possessions and other areas subject to its jurisdiction.

                  "United States person" means,  unless otherwise specified with
respect to any  Securities  pursuant  to Section  301,  an  individual  who is a
citizen or resident of the United States,  a  corporation,  partnership or other
entity created  organized in or under the laws of the United States or an estate
or trust the income of which is subject to United States federal income taxation
regardless of its source.

                  "Yield to Maturity"  means the yield to maturity,  computed at
the time of  issuance  of a Security  (or,  if  applicable,  at the most  recent
redetermination  of interest on such Security) and as set forth in such Security
in accordance  with  generally  accepted  United  States bond yield  computation
principles.

                  SECTION 102.  Compliance  Certificates and Opinions.  Upon any
application  or request by the Company to the  Trustee to take any action  under
any  provision of this  Indenture,  the Company  shall furnish to the Trustee an
Officers'  Certificate stating that all conditions  precedent,  if any, provided
for in this  Indenture  relating to the proposed  action have been complied with
and an Opinion of Counsel  stating  that in the opinion of such counsel all such
conditions  precedent,  if any, have been complied with, except that in the case
of any such  application or request as to which the furnishing of such documents
is  specifically  required by any provision of this  Indenture  relating to such
particular  application or request, no additional certificate or opinion need be
furnished.

                                        7
<PAGE>

                  Every certificate or opinion with respect to compliance with a
condition or covenant  provided for in this  Indenture  (including  certificates
delivered pursuant to Section 1006) shall include:

                           (1) a statement  that each  individual  signing  such
                  certificate or opinion has read such condition or covenant and
                  the definitions herein relating thereto;

                           (2) a brief  statement  as to the nature and scope of
                  the examination or investigation  upon which the statements or
                  opinions contained in such certificate or opinion are based;

                           (3) a  statement  that,  in the  opinion of each such
                  individual,  he has made such  examination or investigation as
                  is necessary  to enable him to express an informed  opinion as
                  to whether or not such condition or covenant has been complied
                  with; and

                           (4) a statement as to whether, in the opinion of each
                  such individual,  such condition or covenant has been complied
                  with.

                  SECTION 103.  Form of Documents  Delivered to Trustee.  In any
case where  several  matters are  required to be  certified  by or covered by an
opinion of any specified  Person,  it is not necessary  that all such matters be
certified  by, or covered by the opinion of, only one such Person,  or that they
be so certified or covered by only one document, but one such Person may certify
or give an opinion as to some  matters and one or more other such  Persons as to
other  matters,  and any such  Person may  certify or give an opinion as to such
matters in one or several documents.

                  Any certificate or opinion of an officer of the Company may be
based, insofar as it relates to legal matters,  upon an Opinion of Counsel, or a
certificate of or representations  by counsel,  unless such officer knows, or in
the exercise of reasonable  care should know,  that the opinion,  certificate or
representations  with  respect  to the  matters  upon which his  certificate  or
opinion is based are  erroneous.  Any such  Opinion of Counsel,  certificate  or
representations may be based,  insofar as it relates to factual matters,  upon a
certificate or opinion of, or representations  by, an officer or officers of the
Company  or any  Subsidiary  stating  that the  information  as to such  factual
matters is in the  possession  of the  Company or such  Subsidiary,  unless such
counsel  knows that the  certificate  or opinion or  representations  as to such
matters are erroneous.

                  Where any Person is required  to make,  give or execute two or
more applications,  requests, consents,  certificates,  statements,  opinions or
other instruments under this Indenture,  they may, but need not, be consolidated
and form one instrument.

                  SECTION  104.  Acts  of  Holders.  (a)  Any  request,  demand,
authorization,  direction,  notice,  consent, waiver or other action provided by
this Indenture to be given or taken by Holders of the Outstanding  Securities of
all series or one or more  series,  as the case may be, may be  embodied  in and
evidenced by one or more  instruments of  substantially  similar tenor signed by
such Holders in person or by agents duly appointed in writing.  If Securities of
a series are issuable as Bearer Securities, any request, demand,  authorization,
direction, notice, consent, waiver or other action provided by this Indenture to
be given or taken by Holders of Securities of such series may, alternatively, be
embodied in and  evidenced by the record of Holders of Securities of such series
voting  in favor  thereof,  either in person or by  proxies  duly  appointed  in
writing,  at any meeting of Holders of Securities of such series duly called and
held in accordance with the provisions of Article  Fifteen,  or a combination of
such  instruments  and any such  record.  Except as herein  otherwise  expressly
provided, such action shall become effective when such instrument or instruments
or record or both are delivered to the Trustee and, where it is hereby expressly
required,  to the Company.  Such  instrument or instruments  and any such record
(and the action  embodied  therein and evidenced  thereby) are herein  sometimes
referred to as the "Act" of the Holders  signing such  instrument or instruments
or so voting at any such meeting.  Proof of execution of any such  instrument or
of a writing  appointing  any such  agent,  or of the holding by any Person of a
Security,  shall be sufficient  for any purpose of this Indenture and conclusive
in favor of the  Trustee  and the  Company  and any agent of the  Trustee or the
Company, if made in

                                        8
<PAGE>

the manner  provided  in this  Section.  The record of any meeting of Holders of
Securities shall be proved in the manner provided in Section 1506.

                  (b) The fact and date of the  execution  by any  Person of any
such  instrument  or writing may be proved by the affidavit of a witness of such
execution or by a certificate of a notary public or other officer  authorized by
law to take  acknowledgments  of deeds,  certifying that the individual  signing
such instrument or writing acknowledged to him the execution thereof. Where such
execution  is by a  signer  acting  in a  capacity  other  than  his  individual
capacity,  such certificate or affidavit shall also constitute  sufficient proof
of his authority.  The fact and date of the execution of any such  instrument or
writing,  or the authority of the Person  executing the same, may also be proved
in any other reasonable manner which the Trustee deems sufficient.

                  (c) The ownership of Registered  Securities shall be proved by
the Security Register.

                  (d) The  ownership of Bearer  Securities  may be proved by the
production  of  such  Bearer  Securities  or  by  a  certificate   executed,  as
depositary,  by any trust company,  bank, banker or other  depositary,  wherever
situated, if such certificate shall be deemed by the Trustee to be satisfactory,
showing that at the date therein  mentioned such Person had on deposit with such
depositary, or exhibited to it, the Bearer Securities therein described; or such
facts may be proved by the  certificate  or affidavit of the Person holding such
Bearer Securities,  if such certificate or affidavit is deemed by the Trustee to
be  satisfactory.  The Trustee and the Company may assume that such ownership of
any Bearer Security continues until (1) another certificate or affidavit bearing
a later date issued in respect of the same Bearer  Security is produced,  or (2)
such Bearer  Security is  produced to the Trustee by some other  Person,  or (3)
such Bearer  Security is surrendered in exchange for a Registered  Security,  or
(4) such  Bearer  Security is no longer  Outstanding.  The  ownership  of Bearer
Securities  may also be proved  in any other  manner  which  the  Trustee  deems
sufficient.

                  (e)  If  the  Company   shall  solicit  from  the  Holders  of
Registered Securities any request,  demand,  authorization,  direction,  notice,
consent,  waiver or other Act, the Company may, at its option, in or pursuant to
a Board  Resolution,  fix in  advance  a record  date for the  determination  of
Holders entitled to give such request, demand, authorization, direction, notice,
consent, waiver or other Act, but the Company shall have no obligation to do so.
Notwithstanding  TIA Section  316(c),  such record date shall be the record date
specified  in or  pursuant to such Board  Resolution,  which shall be a date not
earlier  than  the date 30 days  prior  to the  first  solicitation  of  Holders
generally in connection  therewith and not later than the date such solicitation
is  completed.   If  such  a  record  date  is  fixed,  such  request,   demand,
authorization,  direction,  notice,  consent,  waiver  or other Act may be given
before or after such record date, but only the Holders of record at the close of
business on such  record date shall be deemed to be Holders for the  purposes of
determining   whether  Holders  of  the  requisite   proportion  of  Outstanding
Securities  have  authorized  or agreed or  consented to such  request,  demand,
authorization,  direction,  notice,  consent,  waiver or other Act, and for that
purpose the  Outstanding  Securities  shall be computed as of such record  date;
provided that no such authorization, agreement or consent by the Holders on such
record date shall be deemed effective unless it shall become effective  pursuant
to the  provisions  of this  Indenture  not later than eleven  months  after the
record date.

                  (f) Any request,  demand,  authorization,  direction,  notice,
consent,  waiver or other Act of the  Holder of any  Security  shall  bind every
future Holder of the same Security and the Holder of every Security  issued upon
the registration of transfer thereof or in exchange  therefor or in lieu thereof
in respect of anything done, omitted or suffered to be done by the Trustee,  any
Security Registrar, any Paying Agent, any Authenticating Agent or the Company in
reliance  thereon,  whether  or not  notation  of such  action is made upon such
Security.

                  SECTION  105.  Notices,  etc.,  to Trustee  and  Company.  Any
request,  demand,  authorization,  direction,  notice, consent, waiver or Act of
Holders or other  document  provided or permitted  by this  Indenture to be made
upon, given or furnished to, or filed with,


                                        9
<PAGE>

                           (1) the Trustee by any Holder or by the Company shall
                  be  sufficient  for every  purpose  hereunder if made,  given,
                  furnished  or filed in writing  to or with the  Trustee at its
                  Corporate Trust Office, Attention: ______________________, or

                           (2) the Company by the Trustee or by any Holder shall
                  be sufficient for every purpose  hereunder  (unless  otherwise
                  herein  expressly  provided)  if in writing and mailed,  first
                  class postage prepaid,  to the Company  addressed to it at the
                  address  of  its  principal  office  specified  in  the  first
                  paragraph of this Indenture or at any other address previously
                  furnished in writing to the Trustee by the Company.

                  SECTION 106. Notice to Holders;  Waiver.  Where this Indenture
provides  for  notice of any event to Holders of  Registered  Securities  by the
Company  or the  Trustee,  such  notice  shall  be  sufficiently  given  (unless
otherwise  herein  expressly  provided)  if in writing and  mailed,  first-class
postage  prepaid,  to each such Holder affected by such event, at his address as
it appears in the Security  Register,  not later than the latest  date,  and not
earlier than the earliest date, prescribed for the giving of such notice. In any
case where notice to Holders of Registered  Securities is given by mail, neither
the failure to mail such notice,  nor any defect in any notice so mailed, to any
particular  Holder shall affect the  sufficiency  of such notice with respect to
other  Holders of  Registered  Securities  or the  sufficiency  of any notice to
Holders of Bearer  Securities given as provided  herein.  Any notice mailed to a
Registered Holder in the manner herein  prescribed shall be conclusively  deemed
to have been  received  by such  Holder,  whether  or not such  Holder  actually
receives such notice.

                  If by reason of the suspension of or irregularities in regular
mail service or by reason of any other cause it shall be  impracticable  to give
such notice by mail, then such notification to Holders of Registered  Securities
as shall be made with the approval of the Trustee shall  constitute a sufficient
notification to such Holders for every purpose hereunder.

                  Except as  otherwise  expressly  provided  herein or otherwise
specified  with respect to any  Securities  pursuant to Section 301,  where this
Indenture provides for notice to Holders of Bearer Securities of any event, such
notice shall be  sufficiently  given if published in an Authorized  Newspaper in
The City of New York and in such  other  city or cities as may be  specified  in
such  Securities on a Business Day,  such  publication  to be not later than the
latest date, and not earlier than the earliest  date,  prescribed for the giving
of such  notice.  Any such notice shall be deemed to have been given on the date
of such  publication  or, if published  more than once, on the date of the first
such publication.

                  If  by  reason  of  the   suspension  of  publication  of  any
Authorized Newspaper or Authorized Newspapers or by reason of any other cause it
shall be impracticable to publish any notice to Holders of Bearer  Securities as
provided above,  then such notification to Holders of Bearer Securities as shall
be given with the approval of the Trustee shall constitute  sufficient notice to
such Holders for every purpose hereunder.  Neither the failure to give notice by
publication to any particular Holder of Bearer Securities as provided above, nor
any defect in any notice so  published,  shall  affect the  sufficiency  of such
notice with respect to other Holders of Bearer  Securities or the sufficiency of
any notice to Holders of Registered Securities given as provided herein.

                  Any request, demand, authorization, direction, notice, consent
or waiver  required or permitted  under this  Indenture  shall be in the English
language, except that any published notice may be in an official language of the
country of publication.

                  Where this Indenture  provides for notice in any manner,  such
notice may be waived in writing by the Person  entitled to receive  such notice,
either  before or after the event,  and such waiver shall be the  equivalent  of
such notice.  Waivers of notice by Holders shall be filed with the Trustee,  but
such filing  shall not be a condition  precedent  to the  validity of any action
taken in reliance upon such waiver.

                  SECTION 107.  Effect of Headings  and Table of  Contents.  The
Article  and  Section  headings  herein  and  the  Table  of  Contents  are  for
convenience only and shall not affect the construction hereof.

                                       10
<PAGE>

                  SECTION  108.  Successors  and  Assigns.   All  covenants  and
agreements  in this  Indenture  by the  Company  shall bind its  successors  and
assigns, whether so expressed or not.

                  SECTION 109.  Separability  Clause.  In case any  provision in
this  Indenture  or in any  Security  or coupon  shall be  invalid,  illegal  or
unenforceable,  the  validity,  legality  and  enforceability  of the  remaining
provisions shall not in any way be affected or impaired thereby.

                  SECTION 110. Benefits of Indenture.  Nothing in this Indenture
or in the Securities or coupons,  express or implied,  shall give to any Person,
other than the parties hereto,  any Security  Registrar,  any Paying Agent,  any
Authenticating  Agent and their successors hereunder and the Holders any benefit
or any legal or equitable right, remedy or claim under this Indenture.

                  SECTION 111.  Governing Law. This Indenture and the Securities
and coupons shall be governed by and construed in accordance with the law of The
Commonwealth  of  Massachusetts.  This Indenture is subject to the provisions of
the TIA that are required to be part of this Indenture and shall,  to the extent
applicable, be governed by such provisions.

                  SECTION 112.  Legal  Holidays.  In any case where any Interest
Payment Date, Redemption Date, Repayment Date, sinking fund payment date, Stated
Maturity or Maturity of any Security shall not be a Business Day at any Place of
Payment,  then  (notwithstanding  any other  provision of this  Indenture or any
Security or coupon other than a provision in the  Securities of any series which
specifically states that such provision shall apply in lieu hereof),  payment of
interest or any Additional Amounts or principal (and premium, if any) or sinking
fund payment need not be made at such Place of Payment on such date,  but may be
made on the next succeeding  Business Day at such Place of Payment with the same
force and  effect as if made on the  Interest  Payment  Date,  Redemption  Date,
Repayment  Date or sinking  fund  payment  date,  or at the Stated  Maturity  or
Maturity;  provided  that no interest  shall accrue on the amount so payable for
the period from and after such Interest Payment Date, Redemption Date, Repayment
Date,  sinking fund payment date,  Stated Maturity or Maturity,  as the case may
be.

                  SECTION 113. No Personal  Liability.  THE AMENDED AND RESTATED
DECLARATION  OF  TRUST OF THE  COMPANY  DATED  JULY 1,  1994,  A COPY OF  WHICH,
TOGETHER WITH ALL AMENDMENTS THERETO (THE  "DECLARATION"),  IS DULY FILED IN THE
OFFICE OF THE DEPARTMENT OF  ASSESSMENTS  AND TAXATION OF THE STATE OF MARYLAND,
PROVIDES THAT THE NAME "HEALTH AND  RETIREMENT  PROPERTIES  TRUST" REFERS TO THE
TRUSTEES UNDER THE DECLARATION COLLECTIVELY AS TRUSTEES, BUT NOT INDIVIDUALLY OR
PERSONALLY, AND THAT NO TRUSTEE, OFFICER, SHAREHOLDER,  EMPLOYEE OR AGENT OF THE
COMPANY SHALL BE HELD TO ANY PERSONAL LIABILITY,  JOINTLY OR SEVERALLY,  FOR ANY
OBLIGATION  OF, OR CLAIM  AGAINST,  THE  COMPANY.  ALL PERSONS  DEALING WITH THE
COMPANY,  IN ANY WAY,  SHALL  LOOK  ONLY TO THE  ASSETS OF THE  COMPANY  FOR THE
PAYMENT OF ANY SUM OR THE PERFORMANCE OF ANY OBLIGATION.

                                   ARTICLE TWO

                                SECURITIES FORMS

                  SECTION 201. Forms of Securities.  The Registered  Securities,
if any,  of each  series and the Bearer  Securities,  if any, of each series and
related coupons shall be in  substantially  the forms as shall be established in
one or more indentures  supplemental  hereto or approved from time to time by or
pursuant to a Board  Resolution in accordance  with Section 301, shall have such
appropriate  insertions,  omissions,  substitutions  and other variations as are
required or permitted by this  Indenture or any indenture  supplemental  hereto,
and may  have  such  letters,  numbers  or  other  marks  of  identification  or
designation and such legends or  endorsements  placed thereon as the Company may
deem  appropriate  and as are  not  inconsistent  with  the  provisions  of this
Indenture, or as may be

                                       11
<PAGE>

required to comply  with any law or with any rule or  regulation  made  pursuant
thereto or with any rule or regulation of any  securities  exchange on which the
Securities may be listed, or to conform to usage.

                  Unless  otherwise  specified as  contemplated  by Section 301,
Bearer Securities shall have interest coupons attached.

                  The  definitive  Securities  and  coupons  shall  be  printed,
lithographed  or engraved or produced by any  combination  of these methods on a
steel engraved border or steel engraved  borders or may be produced in any other
manner,  all  as  determined  by the  officers  of the  Company  executing  such
Securities  or coupons,  as evidenced by their  execution of such  Securities or
coupons.

                  SECTION 202. Form of Trustee's  Certificate of Authentication.
Subject to Section 611, the Trustee's  certificate of authentication shall be in
substantially the following form:

         This is one of the Securities of the series designated therein referred
to in the within-mentioned Indenture.

                           ---------------------------------
                                                as Trustee


                           By______________________________
                                        Authorized Officer

                  SECTION 203. Securities Issuable in Global Form. If Securities
of or within a series  are  issuable  in global  form,  as  specified  in and as
contemplated by Section 301, then, notwithstanding clause (8) of Section 301 and
the  provisions of Section 302, any such Security  shall  represent  such of the
Outstanding  Securities  of such  series as shall be  specified  therein and may
provide that it shall represent the aggregate  amount of Outstanding  Securities
of such series from time to time endorsed  thereon and that the aggregate amount
of Outstanding  Securities of such series  represented  thereby may from time to
time be  increased  or  decreased to reflect  exchanges.  Any  endorsement  of a
Security in global form to reflect  the amount,  or any  increase or decrease in
the amount, of Outstanding  Securities  represented thereby shall be made by the
Trustee in such manner and upon instructions  given by such Person or Persons as
shall be  specified  therein  or in the  Company  Order to be  delivered  to the
Trustee pursuant to Section 303 or 304. Subject to the provisions of Section 303
and, if  applicable,  Section 304, the Trustee  shall  deliver and redeliver any
Security in permanent global form in the manner and upon  instructions  given by
the Person or Persons specified therein or in the applicable Company Order. If a
Company  Order  pursuant to Section 303 or 304 has been, or  simultaneously  is,
delivered,  any  instructions  by the Company  with  respect to  endorsement  or
delivery or redelivery of a Security in global form shall be in writing but need
not  comply  with  Section  102 and need not be  accompanied  by an  Opinion  of
Counsel.

                  The provisions of the last sentence of Section 303 shall apply
to any Security  represented  by a Security in global form if such  Security was
never issued and sold by the Company and the Company delivers to the Trustee the
Security in global  form  together  with  written  instructions  (which need not
comply with  Section 102 and need not be  accompanied  by an Opinion of Counsel)
with regard to the reduction in the principal  amount of Securities  represented
thereby,  together with the written statement  contemplated by the last sentence
of Section 303.

                  Notwithstanding   the   provisions  of  Section  307,   unless
otherwise  specified as contemplated by Section 301, payment of principal of and
any premium and interest on any Security in permanent  global form shall be made
to the Person or Persons specified therein.

                  Notwithstanding  the  provisions  of Section 308 and except as
provided in the preceding  paragraph,  the Company, the Trustee and any agent of
the Company and the Trustee shall treat as the Holder of such  principal  amount
of Outstanding  Securities represented by a permanent global Security (i) in the
case of a permanent global

                                       12
<PAGE>

Security in registered  form,  the Holder of such permanent  global  Security in
registered  form or (ii) in the case of a  permanent  global  Security in bearer
form, Euroclear or CEDEL.


                                  ARTICLE THREE

                                 THE SECURITIES

                  SECTION  301.  Amount  Unlimited;   Issuable  in  Series.  The
aggregate  principal  amount  of  Securities  which  may  be  authenticated  and
delivered under this Indenture is unlimited.

                  The  Securities  may be  issued in one or more  series.  There
shall be established  in one or more Board  Resolutions or pursuant to authority
granted by one or more Board Resolutions and, subject to Section 303, set forth,
or  determined  in  the  manner  provided,  in  an  Officers'  Certificate,   or
established in one or more indentures supplemental hereto, prior to the issuance
of Securities of any series, any or all of the following, as applicable (each of
which (except for the matters set forth in clauses (1), (2) and (14) below),  if
so provided,  may be determined from time to time by the Company with respect to
unissued Securities of the series when issued from time to time):

                  (1) the title of the  Securities  of the series  (which  shall
         distinguish  the  Securities  of such series  from all other  series of
         Securities);

                  (2) any  limit  upon the  aggregate  principal  amount  of the
         Securities of the series that may be authenticated  and delivered under
         this Indenture (except for Securities  authenticated and delivered upon
         registration  of transfer of, or in exchange  for, or in lieu of, other
         Securities  of the series  pursuant to Section 304, 305, 306, 906, 1107
         or 1305);

                  (3) the date or dates,  or the  method  by which  such date or
         dates will be  determined,  on which the principal of the Securities of
         the series shall be payable;

                  (4) the rate or rates at which the  Securities  of the  series
         shall bear interest,  if any, or the method by which such rate or rates
         shall be  determined,  the date or dates from which such interest shall
         accrue or the method by which such date or dates  shall be  determined,
         the Interest  Payment  Dates on which such interest will be payable and
         the  Regular  Record  Date,  if any,  for the  interest  payable on any
         Registered  Security on any  Interest  Payment  Date,  or the method by
         which such date shall be determined,  and the basis upon which interest
         shall be  calculated  if other  than that of a  360-day  year of twelve
         30-day months;

                  (5) the place or places  where the  principal  of, any premium
         and  interest  on and any  Additional  Amounts  payable in respect  of,
         Securities of the series shall be payable, any Registered Securities of
         the series may be surrendered for registration of transfer, exchange or
         conversion  and notices or demands to or upon the Company in respect of
         the Securities of the series and this Indenture may be served;

                  (6) the period or periods within which or the date or dates on
         which,  the price or prices at which,  and other  terms and  conditions
         upon which  Securities  of the series may be  redeemed,  in whole or in
         part,  at the  option of the  Company,  if the  Company  is to have the
         option;

                  (7) the obligation, if any, of the Company to redeem, repay or
         purchase  Securities  of the series  pursuant  to any  sinking  fund or
         analogous  provision  or at the  option  of a Holder  thereof,  and the
         period or periods within which or the date or dates on which, the price
         or  prices  at  which,  and  other  terms  and  conditions  upon  which
         Securities  of the series shall be redeemed,  repaid or  purchased,  in
         whole or in part, pursuant to such obligation;

                                       13
<PAGE>

                  (8) if other than  denominations  of $1,000  and any  integral
         multiple thereof, the denominations in which any Registered  Securities
         of the series shall be issuable and the  denomination or  denominations
         in which any Bearer Securities of the series shall be issuable;

                  (9) if other than Dollars,  the Foreign Currency or Currencies
         in which payment of the principal of (and premium,  if any),  interest,
         if any, on, and  Additional  Amounts,  if any, on the Securities of the
         series shall be payable, in which the Securities of the series shall be
         redeemed or purchased or in which the Securities of the series shall be
         denominated;

                  (10) if other than the principal  amount thereof,  the portion
         of the  principal  amount of  Securities  of the  series  that shall be
         payable  upon  declaration  of  acceleration  of the  Maturity  thereof
         pursuant to Section 502 or, if applicable, the portion of the principal
         amount of  Securities of the series that is  convertible  in accordance
         with the  provisions  of this  Indenture,  or the  method by which such
         portion shall be determined;

                  (11)  whether  the amount of  payments  of  principal  of (and
         premium,  if any) or interest,  if any, on the Securities of the series
         may be determined  with reference to an index,  formula or other method
         (which index,  formula or method may be based,  without limitation,  on
         one  or  more  currencies,   currency  units,   composite   currencies,
         commodities,  equity indices or other indices), and the manner in which
         such amounts shall be determined;

                  (12)  whether  the  principal  of  (and  premium,  if  any) or
         interest, if any on or Additional Amounts, if any, on the Securities of
         the series  are to be  payable,  at the  election  of the  Company or a
         Holder thereof, in a currency or currencies,  currency unit or units or
         composite  currency  or  currencies  other  than  that  in  which  such
         Securities  are  denominated  or stated to be  payable,  the  period or
         periods  within which,  and the terms and conditions  upon which,  such
         election  may be made,  and the time and manner of, and identity of the
         exchange rate agent with  responsibility  for  determining the exchange
         rate  between the  currency or  currencies,  currency  unit or units or
         composite   currency  or  currencies  in  which  such   Securities  are
         denominated  or stated to be payable and the  currency  or  currencies,
         currency  unit or units or composite  currency or  currencies  in which
         such Securities are to be paid;

                  (13)  provisions,  if  any,  granting  special  rights  to the
         Holders of Securities of the series upon the  occurrence of such events
         as may be specified;

                  (14) any deletions from,  modifications of or additions to the
         Events  of  Default  or  covenants  of the  Company  set  forth in this
         Indenture with respect to Securities of the series (whether or not such
         Events of  Default  or  covenants  are  consistent  with the  Events of
         Default or covenants set forth herein);

                  (15)  whether  Securities  of the series are to be issuable as
         Registered  Securities,  Bearer Securities (with or without coupons) or
         both,  any  restrictions  applicable to the offer,  sale or delivery of
         Bearer  Securities  and the terms upon which Bearer  Securities  of the
         series may be exchanged  for  Registered  Securities  of the series and
         vice versa (if permitted by applicable laws and  regulations),  whether
         any Securities of the series are to be issuable  initially in temporary
         global form and whether any Securities of the series are to be issuable
         in permanent  global form with or without  coupons and, if so,  whether
         beneficial  owners of interests in any such permanent  global  Security
         may exchange such  interests for  Securities of such series and of like
         tenor of any authorized  form and  denomination  and the  circumstances
         under which any such  exchanges may occur,  if other than in the manner
         provided in Section 305,  and, if  Registered  Securities of the series
         are to be issuable as a global Security, the identity of the depositary
         for such series;

                  (16) the date as of which any Bearer  Securities of the series
         and any temporary global Security representing  Outstanding  Securities
         of the  series  shall  be dated  if  other  than  the date of  original
         issuance of the first Security of the series to be issued;

                                       14
<PAGE>

                  (17)  the  Person  to  whom  any  interest  on any  Registered
         Security of the series  shall be  payable,  if other than the Person in
         whose name that  Security (or one or more  Predecessor  Securities)  is
         registered at the close of business on the Regular Record Date for such
         interest,  the manner in which,  or the Person to whom, any interest on
         any Bearer  Security of the series shall be payable,  if otherwise than
         upon presentation and surrender of the coupons  appertaining thereto as
         they severally mature, and the extent to which, or the manner in which,
         any  interest  payable on a  temporary  global  Security on an Interest
         Payment  Date  will be paid if other  than in the  manner  provided  in
         Section 304;

                  (18) the  applicability,  if any, of Sections 1402 and/or 1403
         to the Securities of the series and any provisions in modification  of,
         in addition to or in lieu of any of the provisions of Article Fourteen;

                  (19) if the  Securities  of such  series are to be issuable in
         definitive  form  (whether  upon  original  issue or upon exchange of a
         temporary  Security  of such  series)  only  upon  receipt  of  certain
         certificates or other  documents or  satisfaction of other  conditions,
         then  the  form  and/or  terms  of  such  certificates,   documents  or
         conditions;

                  (20) if the Securities of the series are to be issued upon the
         exercise of warrants, the time, manner and place for such Securities to
         be authenticated and delivered;

                  (21) whether and under what circumstances the Company will pay
         Additional Amounts as contemplated by Section 1007 on the Securities of
         the series to any Holder who is not a United States  person  (including
         any modification to the definition of such term) in respect of any tax,
         assessment or governmental  charge and, if so, whether the Company will
         have  the  option  to  redeem  such  Securities  rather  than  pay such
         Additional Amounts (and the terms of any such option);

                  (22) the  obligation,  if any,  of the  Company  to permit the
         conversion  of the  Securities  of such series  into  Common  Shares or
         Preferred  Shares of the Company or other  securities,  as the case may
         be, and the terms and conditions  upon which such  conversion  shall be
         effected (including,  without limitation,  the initial conversion price
         or rate,  the  conversion  period,  any  adjustment  of the  applicable
         conversion  price and any  requirements  relative to the reservation of
         such shares for purposes of conversion);

                  (23) the terms and  conditions,  if any, upon which payment of
         the Securities of such series shall be  subordinated  to the Securities
         of another  series or other  indebtedness  of the  Company  (including,
         without limitation, indebtedness which ranks senior to such Securities;
         restrictions on payments to Holders of such Securities  while a default
         with respect to such senior  indebtedness is continuing;  restrictions,
         if any,  on payments to the  Holders of such  Securities  following  an
         Event of Default;  and any  requirements for Holders of such Securities
         to remit certain payments to the holders of such senior indebtedness);

                  (24) if the Securities of the series are to be guaranteed, the
         term and conditions of such guarantee;

                  (25) if other than the Trustee,  the identity of each Security
         Registrar and/or Paying Agent for the series; and

                  (26) any other terms of the series  (which  terms shall not be
         inconsistent with the provisions of this Indenture).

                  All Securities of any one series and the coupons  appertaining
to any Bearer Securities of such series shall be substantially identical except,
in the case of  Registered  Securities,  as to  denominations  and except as may
otherwise be provided in or pursuant to the Board  Resolution  establishing  the
series (subject to Section 303) and set

                                       15

<PAGE>

forth in an Officers'  Certificate or in any indenture  supplemental hereto. All
Securities  of any one  series  need not be issued at the same time and,  unless
otherwise  provided,  a series  may be  reopened,  without  the  consent  of the
Holders, for issuances of additional Securities of such series.

                  If any of  the  terms  of the  Securities  of any  series  are
established by action taken pursuant to one or more Board Resolutions, a copy of
an appropriate  record of such action(s)  shall be certified by the Secretary or
an Assistant  Secretary of the Company and  delivered to the Trustee at or prior
to the  delivery of the  Officers'  Certificate  setting  forth the terms of the
Securities of such series.

                  SECTION  302.  Denominations.  The  Securities  of each series
shall be issuable in such denominations as shall be specified as contemplated by
Section 301. With respect to Securities of any series denominated in Dollars, in
the absence of any such  provisions,  the Registered  Securities of such series,
other than  Registered  Securities  issued in global  form  (which may be of any
denomination),  shall be issuable in  denominations  of $1,000 and any  integral
multiple thereof.

                  SECTION 303. Execution,  Authentication,  Delivery and Dating.
The Securities and any coupons  appertaining thereto shall be executed on behalf
of the Company by its  President or one of its Vice  Presidents,  under its seal
reproduced  thereon,  and  attested  by its  Secretary  or one of its  Assistant
Secretaries.  The  signature  of any of these  officers  on the  Securities  and
coupons may be manual or facsimile  signatures of the present or any future such
authorized  officer  and  may  be  imprinted  or  otherwise  reproduced  on  the
Securities.

                  Securities   or  coupons   bearing  the  manual  or  facsimile
signatures  of  individuals  who  were at any time the  proper  officers  of the
Company shall bind the Company,  notwithstanding that such individuals or any of
them have ceased to hold such offices prior to the  authentication  and delivery
of such  Securities or did not hold such offices at the date of such  Securities
or coupons.

                  At any time and from  time to time  after  the  execution  and
delivery of this  Indenture,  the Company may deliver  Securities of any series,
together with any coupon  appertaining  thereto,  executed by the Company to the
Trustee for authentication, together with a Company Order for the authentication
and delivery of such Securities,  and the Trustee in accordance with the Company
Order shall authenticate and deliver such Securities;  provided,  however, that,
in connection with its original issuance,  no Bearer Security shall be mailed or
otherwise  delivered to any location in the United States;  and provided further
that,  unless  otherwise  specified  with  respect to any  series of  Securities
pursuant to Section 301, a Bearer  Security may be delivered in connection  with
its  original  issuance  only if the  Person  entitled  to receive  such  Bearer
Security shall have furnished a certificate in the form set forth in Exhibit A-1
to this Indenture or such other  certificate as may be specified with respect to
any series of Securities  pursuant to Section 301, dated no earlier than 15 days
prior to the earlier of the date on which such Bearer  Security is delivered and
the date on which any temporary  Security  first becomes  exchangeable  for such
Bearer Security in accordance with the terms of such temporary Security and this
Indenture.  If any Security shall be  represented  by a permanent  global Bearer
Security,  then, for purposes of this Section and Section 304, the notation of a
beneficial  owner's interest therein upon original  issuance of such Security or
upon exchange of a portion of a temporary  global Security shall be deemed to be
delivery in connection  with its original  issuance of such  beneficial  owner's
interest in such permanent global Security.  Except as permitted by Section 306,
the Trustee shall not  authenticate  and deliver any Bearer  Security unless all
appurtenant  coupons for interest then matured have been detached and cancelled.
If all the  Securities of any series are not to be issued at one time and if the
Board  Resolution or supplemental  indenture  establishing  such series shall so
permit,  such Company Order may set forth  procedures  acceptable to the Trustee
for the issuance of such  Securities  and  determining  the terms of  particular
Securities of such series, such as interest rate or formula, maturity date, date
of issuance and date from which interest shall accrue.  In  authenticating  such
Securities,  and accepting the additional  responsibilities under this Indenture
in relation to such  Securities,  the Trustee shall be entitled to receive,  and
(subject to TIA Sections  315(a)  through  315(d))  shall be fully  protected in
relying upon,

                           (i)      an Opinion of Counsel stating that

                                       16

<PAGE>

                                    (a)     the form or forms of such Securities
                  and any coupons have been established in conformity with the 
                  provisions of this Indenture;

                                    (b)     the terms of such Securities and any
                  coupons have been established in conformity with the 
                  provisions of this Indenture; and

                                    (c)  such  Securities,   together  with  any
                  coupons  appertaining  thereto,  when completed by appropriate
                  insertions  and executed  and  delivered by the Company to the
                  Trustee for  authentication in accordance with this Indenture,
                  authenticated  and delivered by the Trustee in accordance with
                  this  Indenture  and  issued by the  Company in the manner and
                  subject  to  any  conditions  specified  in  such  Opinion  of
                  Counsel,  will constitute legal, valid and binding obligations
                  of the Company,  enforceable  in accordance  with their terms,
                  subject to applicable bankruptcy,  insolvency,  reorganization
                  and other similar laws of general applicability relating to or
                  affecting the enforcement of creditors'  rights  generally and
                  to general equitable principles; and

                           (ii)  an  Officers'   Certificate  stating  that  all
         conditions  precedent  provided for in this  Indenture  relating to the
         issuance of the  Securities  have been  complied  with and that, to the
         best of the knowledge of the signers of such  certificate,  no Event of
         Default with respect to any of the  Securities  shall have occurred and
         be continuing.

If such  form or terms  have  been so  established,  the  Trustee  shall  not be
required  to  authenticate  such  Securities  if the  issue  of such  Securities
pursuant  to this  Indenture  will  affect the  Trustee's  own  rights,  duties,
obligations  or immunities  under the Securities and this Indenture or otherwise
in a manner which is not reasonably acceptable to the Trustee.

                  Notwithstanding  the  provisions  of  Section  301  and of the
preceding paragraph, if all the Securities of any series are not to be issued at
one  time,  it shall  not be  necessary  to  deliver  an  Officers'  Certificate
otherwise  required pursuant to Section 301 or a Company Order, or an Opinion of
Counsel or an Officers' Certificate otherwise required pursuant to the preceding
paragraph  at the time of issuance of each  Security  of such  series,  but such
order,  opinion and certificates,  with appropriate  modifications to cover such
future  issuances,  shall be  delivered at or before the time of issuance of the
first Security of such series.

                  Each  Registered  Security  shall  be  dated  the  date of its
authentication  and each Bearer Security shall be dated as of the date specified
as contemplated by Section 301.

                  No Security or coupon  shall be entitled to any benefit  under
this Indenture or be valid or obligatory for any purpose unless there appears on
such  Security  or Security to which such coupon  appertains  a  certificate  of
authentication  substantially  in the form  provided for herein duly executed by
the Trustee by manual signature of an authorized  officer,  and such certificate
upon any Security shall be conclusive evidence, and the only evidence, that such
Security has been duly authenticated and delivered  hereunder and is entitled to
the benefits of this Indenture.  Notwithstanding the foregoing,  if any Security
shall have been authenticated and delivered  hereunder but never issued and sold
by the Company,  and the Company  shall deliver such Security to the Trustee for
cancellation as provided in Section 309 together with a written statement (which
need not comply with  Section 102 and need not be  accompanied  by an Opinion of
Counsel)  stating  that such  Security  has never  been  issued  and sold by the
Company,  for all purposes of this Indenture such Security shall be deemed never
to have been  authenticated and delivered  hereunder and shall never be entitled
to the benefits of this Indenture.

                  SECTION 304. Temporary Securities. (a) Pending the preparation
of  definitive  Securities  of any series,  the Company  may  execute,  and upon
Company Order the Trustee shall authenticate and deliver,  temporary  Securities
which  are  printed,  lithographed,   typewritten,   mimeographed  or  otherwise
produced,  in any  authorized  denomination,  substantially  of the tenor of the
definitive  Securities in lieu of which they are issued, in registered form, or,
if authorized,  in bearer form with one or more coupons or without coupons,  and
with such appropriate

                                       17
<PAGE>

insertions,  omissions,  substitutions  and  other  variations  as the  officers
executing  such  Securities may determine,  as  conclusively  evidenced by their
execution of such  Securities.  In the case of  Securities  of any series,  such
temporary Securities may be in global form.

                  Except in the case of  temporary  Securities  in  global  form
(which  shall be  exchanged in  accordance  with Section  304(b) or as otherwise
provided in or pursuant to a Board Resolution),  if temporary  Securities of any
series are issued,  the Company will cause definitive  Securities of that series
to be prepared without  unreasonable  delay. After the preparation of definitive
Securities  of such series,  the  temporary  Securities  of such series shall be
exchangeable  for  definitive  Securities  of such series upon  surrender of the
temporary  Securities of such series at the office or agency of the Company in a
Place of Payment for that series,  without charge to the Holder.  Upon surrender
for  cancellation  of any  one  or  more  temporary  Securities  of  any  series
(accompanied by any non-matured coupons appertaining thereto), the Company shall
execute and the Trustee shall  authenticate  and deliver in exchange  therefor a
like principal amount of definitive  Securities of the same series of authorized
denominations;  provided,  however,  that no definitive Bearer Security shall be
delivered in exchange for a temporary Registered Security;  and provided further
that a definitive Bearer Security shall be delivered in exchange for a temporary
Bearer Security only in compliance with the conditions set forth in Section 303.
Until so exchanged, the temporary Securities of any series shall in all respects
be entitled to the same benefits under this  Indenture as definitive  Securities
of such series.

                  (b)  Unless  otherwise  provided  in or  pursuant  to a  Board
Resolution,   this  Section  304(b)  shall  govern  the  exchange  of  temporary
Securities  issued in global form other than through the  facilities  of DTC. If
any such temporary Security is issued in global form, then such temporary global
Security shall,  unless otherwise  provided therein,  be delivered to the London
office of a depositary or common depositary (the "Common  Depositary"),  for the
benefit of Euroclear  and CEDEL,  for credit to the  respective  accounts of the
beneficial  owners of such  Securities  (or to such other  accounts  as they may
direct).

                  Without  unnecessary delay but in any event not later than the
date  specified in, or determined  pursuant to the terms of, any such  temporary
global Security (the "Exchange Date"),  the Company shall deliver to the Trustee
definitive  Securities,  in aggregate  principal  amount equal to the  principal
amount of such temporary global Security,  executed by the Company.  On or after
the Exchange Date,  such temporary  global  Security shall be surrendered by the
Common Depositary to the Trustee, as the Company's agent for such purpose, to be
exchanged,  in whole or from  time to time in part,  for  definitive  Securities
without charge, and the Trustee shall authenticate and deliver,  in exchange for
each portion of such temporary  global  Security,  an equal aggregate  principal
amount of definitive  Securities of the same series of authorized  denominations
and of like  tenor  as the  portion  of such  temporary  global  Security  to be
exchanged.  The  definitive  Securities to be delivered in exchange for any such
temporary global Security shall be in bearer form,  registered  form,  permanent
global  bearer form or permanent  global  registered  form,  or any  combination
thereof,  as specified as  contemplated  by Section 301, and, if any combination
thereof is so specified, as requested by the beneficial owner thereof; provided,
however,  that,  unless  otherwise  specified in such temporary global Security,
upon such presentation by the Common Depositary,  such temporary global Security
is accompanied by a certificate dated the Exchange Date or a subsequent date and
signed by Euroclear as to the portion of such temporary global Security held for
its account then to be exchanged and a certificate  dated the Exchange Date or a
subsequent  date and signed by CEDEL as to the portion of such temporary  global
Security held for its account then to be  exchanged,  each in the form set forth
in Exhibit  A-2 to this  Indenture  or in such other form as may be  established
pursuant to Section 301; and provided further that definitive  Bearer Securities
shall be delivered in exchange for a portion of a temporary global Security only
in compliance with the requirements of Section 303.

                  Unless otherwise  specified in such temporary global Security,
the  interest of a  beneficial  owner of  Securities  of a series in a temporary
global Security shall be exchanged for definitive  Securities of the same series
and of like tenor following the Exchange Date when the account holder  instructs
Euroclear or CEDEL,  as the case may be, to request such  exchange on his behalf
and  delivers to Euroclear or CEDEL,  as the case may be, a  certificate  in the
form set forth in Exhibit A-1 to this  Indenture  (or in such other forms as may
be established  pursuant to Section 301), dated no earlier than 15 days prior to
the Exchange Date, copies of which certificate shall be available

                                       18
<PAGE>

from the offices of Euroclear and CEDEL, the Trustee,  any Authenticating  Agent
appointed for such series of Securities and each Paying Agent.  Unless otherwise
specified in such  temporary  global  Security,  any such exchange shall be made
free of  charge to the  beneficial  owners of such  temporary  global  Security,
except  that a Person  receiving  definitive  Securities  must  bear the cost of
insurance,  postage,  transportation  and the  like  unless  such  Person  takes
delivery of such definitive  Securities in person at the offices of Euroclear or
CEDEL.  Definitive Securities in bearer form to be delivered in exchange for any
portion of a temporary  global  Security  shall be  delivered  only  outside the
United States.

                  Until exchanged in full as hereinabove provided, the temporary
Securities  of any series shall in all respects be entitled to the same benefits
under this  Indenture as  definitive  Securities  of the same series and of like
tenor  authenticated  and delivered  hereunder,  except that,  unless  otherwise
specified as contemplated by Section 301, interest payable on a temporary global
Security on an Interest  Payment Date for  Securities  of such series  occurring
prior to the applicable Exchange Date shall be payable to Euroclear and CEDEL on
such  Interest  Payment Date upon delivery by Euroclear and CEDEL to the Trustee
of a certificate  or  certificates  in the form set forth in Exhibit A-2 to this
Indenture  (or in such other  forms as may be  established  pursuant  to Section
301), for credit without further interest on or after such Interest Payment Date
to the  respective  accounts  of persons who are the  beneficial  owners of such
temporary  global  Security  on such  Interest  Payment  Date and who have  each
delivered  to  Euroclear or CEDEL,  as the case may be, a  certificate  dated no
earlier than 15 days prior to the Interest  Payment Date occurring prior to such
Exchange Date in the form set forth as Exhibit A-1 to this Indenture (or in such
other  forms as may be  established  pursuant to Section  301).  Notwithstanding
anything to the contrary herein contained,  the certifications  made pursuant to
this paragraph shall satisfy the certification requirements of the preceding two
paragraphs of this Section 304 (b) and of the third  paragraph of Section 303 of
this Indenture and the interests of the Persons who are the beneficial owners of
a temporary  global Security with respect to which such  certification  was made
will be exchanged for definitive Securities of the same series and of like tenor
on the Exchange Date or the date of  certification if such date occurs after the
Exchange Date, without further act or deed by such beneficial owners.  Except as
otherwise provided in this paragraph, no payments of principal or interest owing
with respect to a beneficial  interest in a temporary  global  Security  will be
made unless and until such interest in such temporary global Security shall have
been  exchanged  for an  interest  in a  definitive  Security.  Any  interest so
received  by  Euroclear  and  CEDEL  and not paid as  herein  provided  shall be
returned to the Trustee prior to the expiration of two years after such Interest
Payment Date in order to be repaid to the Company.

                  SECTION  305.  Registration,   Registration  of  Transfer  and
Exchange.  The Company shall cause to be kept at the  Corporate  Trust Office of
the  Trustee or in any  office or agency of the  Company in a Place of Payment a
register for each series of Securities (the registers  maintained in such office
or in any such  office or  agency of the  Company  in a Place of  Payment  being
herein sometimes referred to collectively as the "Security  Register") in which,
subject to such  reasonable  regulations as it may prescribe,  the Company shall
provide for the  registration  of  Registered  Securities  and of  transfers  of
Registered  Securities.  The Security  Register  shall be in written form or any
other form  capable of being  converted  into  written  form within a reasonable
time. The Trustee,  at its Corporate Trust Office, is hereby initially appointed
"Security  Registrar" for the purpose of registering  Registered  Securities and
transfers of Registered Securities on such Security Register as herein provided.
In the event that the Trustee  shall cease to be  Security  Registrar,  it shall
have the right to examine the Security Register at all reasonable times.

                  Subject to the  provisions of this Section 305, upon surrender
for  registration  of transfer of any  Registered  Security of any series at any
office or agency of the  Company  in a Place of  Payment  for that  series,  the
Company shall execute,  and the Trustee shall  authenticate and deliver,  in the
name of the  designated  transferee or  transferees,  one or more new Registered
Securities of the same series,  of any  authorized  denominations  and of a like
aggregate principal amount, bearing a number not contemporaneously  outstanding,
and containing identical terms and provisions.

                  Subject to the  provisions  of this Section 305, at the option
of the Holder,  Registered  Securities  of any series may be exchanged for other
Registered Securities of the same series, of any authorized denomination or

                                       19
<PAGE>

denominations  and of a like aggregate  principal amount,  containing  identical
terms  and  provisions,  upon  surrender  of  the  Registered  Securities  to be
exchanged at any such office or agency.  Whenever any such Registered Securities
are so  surrendered  for exchange,  the Company shall  execute,  and the Trustee
shall  authenticate  and deliver,  the  Registered  Securities  which the Holder
making the  exchange is entitled to receive.  Unless  otherwise  specified  with
respect to any series of  Securities  as  contemplated  by Section  301,  Bearer
Securities may not be issued in exchange for Registered Securities.

                  If (but only if) permitted by the applicable  Board Resolution
and (subject to Section 303) set forth in the applicable Officers'  Certificate,
or in any indenture  supplemental  hereto,  delivered as contemplated by Section
301,  at the  option of the  Holder,  Bearer  Securities  of any  series  may be
exchanged  for  Registered  Securities  of the  same  series  of any  authorized
denominations and of a like aggregate principal amount and tenor, upon surrender
of the Bearer Securities to be exchanged at any such office or agency,  with all
unmatured  coupons and all matured coupons in default thereto  appertaining.  If
the Holder of a Bearer  Security is unable to produce any such unmatured  coupon
or coupons or matured coupon or coupons in default,  any such permitted exchange
may be effected if the Bearer  Securities  are  accompanied  by payment in funds
acceptable  to the Company in an amount equal to the face amount of such missing
coupon or coupons,  or the  surrender of such  missing  coupon or coupons may be
waived  by the  Company  and the  Trustee  if there is  furnished  to them  such
security  or  indemnity  as they may require to save each of them and any Paying
Agent harmless. If thereafter the Holder of such Security shall surrender to any
Paying  Agent any such missing  coupon in respect of which such a payment  shall
have been made,  such  Holder  shall be  entitled  to receive the amount of such
payment; provided,  however, that, except as otherwise provided in Section 1002,
interest  represented  by coupons  shall be payable only upon  presentation  and
surrender  of those  coupons at an office or agency  located  outside the United
States.  Notwithstanding the foregoing,  in case a Bearer Security of any series
is  surrendered  at any such  office  or agency in a  permitted  exchange  for a
Registered  Security  of the same  series  and like  tenor  after  the  close of
business at such office or agency on (i) any Regular  Record Date and before the
opening of business at such office or agency on the  relevant  Interest  Payment
Date, or (ii) any Special Record Date and before the opening of business at such
office or agency on the related proposed date for payment of Defaulted Interest,
such Bearer  Security shall be surrendered  without the coupon  relating to such
Interest  Payment  Date or proposed  date for  payment,  as the case may be, and
interest or Defaulted Interest,  as the case may be, will not be payable on such
Interest  Payment  Date or  proposed  date for  payment,  as the case may be, in
respect of the Registered  Security issued in exchange for such Bearer Security,
but will be payable  only to the Holder of such  coupon  when due in  accordance
with the  provisions of this  Indenture.  Whenever any Bearer  Securities are so
surrendered  for  exchange,  the Company  shall  execute,  and the Trustee shall
authenticate and deliver, the Securities which the Holder making the exchange is
entitled to receive.

                  Notwithstanding  the foregoing,  except as otherwise specified
as  contemplated  by  Section  301,  any  permanent  global  Security  shall  be
exchangeable  only as  provided in this  paragraph.  If the  depositary  for any
permanent global Security is DTC, then, unless the terms of such global Security
expressly  permit such global  Security to be  exchanged in whole or in part for
definitive Securities, a global Security may be transferred, in whole but not in
part, only to a nominee of DTC, or by a nominee of DTC to DTC, or to a successor
to DTC for such  global  Security  selected  or  approved by the Company or to a
nominee of such  successor  to DTC. If at any time DTC notifies the Company that
it is unwilling or unable to continue as depositary  for the  applicable  global
Security  or  Securities  or if at any time DTC ceases to be a  clearing  agency
registered under the Securities Exchange Act of 1934, as amended, if so required
by  applicable  law  or  regulation,  the  Company  shall  appoint  a  successor
depositary  with  respect  to  such  global  Security  or  Securities.  If (x) a
successor  depositary for such global Security or Securities is not appointed by
the  Company  within 90 days after the Company  receives  such notice or becomes
aware of such unwillingness, inability or ineligibility, (y) an Event of Default
has occurred and is continuing and the beneficial owners representing a majority
in principal amount of the applicable  series of Securities  represented by such
global Security or Securities  advise DTC to cease acting as depositary for such
global  Security  or  Securities  or (z) the  Company,  in its sole  discretion,
determines at any time that all  Outstanding  Securities (but not less than all)
of any series  issued or issuable  in the form of one or more global  Securities
shall no longer be represented by such global  Security or Securities,  then the
Company  shall  execute,   and  the  Trustee  shall  authenticate  and  deliver,
definitive  Securities of like series,  rank, tenor and terms in definitive form
in an aggregate principal amount equal to the

                                       20
<PAGE>

principal amount of such global Security or Securities.  If any beneficial owner
of an interest in a permanent global Security is otherwise  entitled to exchange
such  interest  for  Securities  of such series and of like tenor and  principal
amount of another authorized form and denomination, as specified as contemplated
by Section 301 and provided that any applicable notice provided in the permanent
global Security shall have been given, then without unnecessary delay but in any
event  no  later  than  the  earliest  date on  which  such  interest  may be so
exchanged,  the Company shall execute,  and the Trustee shall  authenticate  and
deliver,  definitive  Securities  in  aggregate  principal  amount  equal to the
principal  amount of such beneficial  owner's  interest in such permanent global
Security.  On or after  the  earliest  date on which  such  interests  may be so
exchanged,  such permanent  global Security shall be surrendered for exchange by
DTC or such other  depositary  as shall be specified  in the Company  Order with
respect  thereto  to the  Trustee,  as the  Company's  agent  for such  purpose;
provided, however, that no such exchanges may occur during a period beginning at
the  opening of  business  15 days  before any  selection  of  Securities  to be
redeemed  and ending on the relevant  Redemption  Date if the Security for which
exchange is requested may be among those selected for  redemption;  and provided
further  that no Bearer  Security  delivered  in  exchange  for a  portion  of a
permanent global Security shall be mailed or otherwise delivered to any location
in the United  States.  If a  Registered  Security is issued in exchange for any
portion of a permanent global Security after the close of business at the office
or agency where such exchange  occurs on (i) any Regular  Record Date and before
the  opening  of  business  at such  office or agency on the  relevant  Interest
Payment Date, or (ii) any Special Record Date and before the opening of business
at such office or agency on the related  proposed  date for payment of Defaulted
Interest,  interest  or  Defaulted  Interest,  as the case  may be,  will not be
payable on such Interest Payment Date or proposed date for payment,  as the case
may be, in  respect  of such  Registered  Security,  but will be payable on such
Interest Payment Date or proposed date for payment,  as the case may be, only to
the Person to whom interest in respect of such portion or such permanent  global
Security is payable in accordance with the provisions of this Indenture.

                  All  Securities  issued upon any  registration  of transfer or
exchange of Securities shall be the valid obligations of the Company, evidencing
the same debt,  and entitled to the same benefits under this  Indenture,  as the
Securities surrendered upon such registration of transfer or exchange.

                  Every  Registered   Security   presented  or  surrendered  for
registration of transfer or for exchange or redemption  shall (if so required by
the Company or the Security Registrar) be duly endorsed,  or be accompanied by a
written  instrument  of  transfer  in form  satisfactory  to the Company and the
Security  Registrar,  duly  executed by the Holder  thereof or his attorney duly
authorized in writing.

                  No  service  charge  shall  be made  for any  registration  of
transfer or exchange of Securities, but the Company may require payment of a sum
sufficient to cover any tax or other governmental  charge that may be imposed in
connection with any  registration  of transfer or exchange of Securities,  other
than  exchanges  pursuant to Section 304,  906,  1107 or 1305 not  involving any
transfer.

                  The  Company  or the  Trustee,  as  applicable,  shall  not be
required (i) to issue, register the transfer of or exchange any Security if such
Security may be among those selected for redemption during a period beginning at
the  opening of  business  15 days  before  selection  of the  Securities  to be
redeemed  under  Section 1103 and ending at the close of business on (A) if such
Securities are issuable only as Registered Securities, the day of the mailing of
the relevant  notice of redemption  and (B) if such  Securities  are issuable as
Bearer  Securities,  the day of the first  publication of the relevant notice of
redemption or, if such Securities are also issuable as Registered Securities and
there is no publication,  the mailing of the relevant  notice of redemption,  or
(ii) to register the transfer of or exchange any Registered Security so selected
for  redemption  in  whole  or in part,  except,  in the case of any  Registered
Security to be redeemed in part,  the  portion  thereof not to be  redeemed,  or
(iii) to exchange  any Bearer  Security so selected for  redemption  except that
such a Bearer Security may be exchanged for a Registered Security of that series
and  of  like  tenor;   provided  that  such   Registered   Security   shall  be
simultaneously  surrendered  for  redemption,  or (iv) to  issue,  register  the
transfer of or exchange any Security which has been surrendered for repayment at
the option of the Holder, except that portion, if any, of such Security which is
not to be so repaid.

                                       21
<PAGE>

                  SECTION 306. Mutilated, Destroyed, Lost and Stolen Securities.
If any mutilated Security or a Security with a mutilated coupon  appertaining to
it is surrendered to the Trustee or the Company, together with, in proper cases,
such  security or  indemnity as may be required by the Company or the Trustee to
save each of them or any agent of either of them  harmless,  the  Company  shall
execute and the Trustee shall  authenticate  and deliver in exchange  therefor a
new Security of the same series and principal amount, containing identical terms
and  provisions  and bearing a number not  contemporaneously  outstanding,  with
coupons  corresponding to the coupons,  if any,  appertaining to the surrendered
Security.

                  If there shall be  delivered to the Company and to the Trustee
(i)  evidence to their  satisfaction  of the  destruction,  loss or theft of any
Security or coupon,  and (ii) such  security or  indemnity as may be required by
them to save each of them and any agent of either of them harmless, then, in the
absence of written  notice to the Company or the Trustee  that such  Security or
coupon has been acquired by a bona fide purchaser, the Company shall execute and
upon its request the Trustee shall authenticate and deliver, in lieu of any such
destroyed,  lost or stolen  Security or in exchange  for the Security to which a
destroyed,  lost or stolen coupon  appertains (with all appurtenant  coupons not
destroyed,  lost or stolen),  a new  Security  of the same series and  principal
amount,  containing  identical  terms and  provisions  and  bearing a number not
contemporaneously  outstanding,  with coupons  corresponding to the coupons,  if
any, appertaining to such destroyed,  lost or stolen Security or to the Security
to which such destroyed, lost or stolen coupon appertains.

                  Notwithstanding the provisions of the previous two paragraphs,
in case any such  mutilated,  destroyed,  lost or stolen  Security or coupon has
become or is about to become due and payable, the Company in its discretion may,
instead of issuing a new Security, with coupons corresponding to the coupons, if
any, appertaining to such destroyed,  lost or stolen Security or to the Security
to which such destroyed, lost or stolen coupon appertains,  pay such Security or
coupon;  provided,  however, that payment of principal of (and premium, if any),
any interest on and any  Additional  Amounts with respect to, Bearer  Securities
shall,  except as  otherwise  provided in Section  1002,  be payable  only at an
office or agency  located  outside  the  United  States  and,  unless  otherwise
specified as  contemplated  by Section  301,  any interest on Bearer  Securities
shall  be  payable  only  upon   presentation   and  surrender  of  the  coupons
appertaining thereto.

                  Upon the issuance of any new Security under this Section,  the
Company may require  the payment of a sum  sufficient  to cover any tax or other
governmental  charge  that may be  imposed  in  relation  thereto  and any other
expenses (including the fees and expenses of the Trustee) connected therewith.

                  Every new  Security  of any series with its  coupons,  if any,
issued  pursuant  to  this  Section  in lieu of any  destroyed,  lost or  stolen
Security,  or in exchange  for a Security to which a  destroyed,  lost or stolen
coupon  appertains,   shall  constitute  an  original   additional   contractual
obligation of the Company, whether or not the destroyed, lost or stolen Security
and its coupons, if any, or the destroyed, lost or stolen coupon shall be at any
time  enforceable  by anyone,  and shall be entitled to all the benefits of this
Indenture equally and proportionately  with any and all other Securities of that
series and their coupons, if any, duly issued hereunder.

                  The  provisions  of  this  Section  are  exclusive  and  shall
preclude (to the extent  lawful) all other  rights and remedies  with respect to
the replacement or payment of mutilated, destroyed, lost or stolen Securities or
coupons.

                  SECTION 307. Payment of Interest;  Interest Rights  Preserved.
Except  as  otherwise  specified  with  respect  to a series  of  Securities  in
accordance  with the  provisions  of Section  301,  interest  on any  Registered
Security that is payable,  and is  punctually  paid or duly provided for, on any
Interest  Payment  Date shall be paid to the Person in whose name that  Security
(or one or more  Predecessor  Securities) is registered at the close of business
on the  Regular  Record  Date for such  interest  at the office or agency of the
Company maintained for such purpose pursuant to Section 1002; provided, however,
that  each  installment  of  interest  on  any  Registered  Security  may at the
Company's option be paid by (i) mailing a check for such interest, payable to or
upon the written order of the Person entitled  thereto  pursuant to Section 308,
to the  address of such  Person as it appears on the  Security  Register or (ii)
transfer to an account maintained by the payee located inside the United States.

                                       22
<PAGE>

                  Unless otherwise  provided as contemplated by Section 301 with
respect to the Securities of any series, payment of interest may be made, in the
case of a Bearer  Security,  by transfer to an account  maintained  by the payee
with a bank located outside the United States.

                  Unless  otherwise  provided as  contemplated  by Section  301,
every permanent  global Security will provide that interest,  if any, payable on
any Interest  Payment Date will be paid to DTC,  Euroclear  and/or CEDEL, as the
case may be, with respect to that portion of such permanent global Security held
for its account by Cede & Co. or the Common Depositary,  as the case may be, for
the purpose of  permitting  such party to credit the interest  received by it in
respect of such  permanent  global  Security to the  accounts of the  beneficial
owners thereof.

                  In case a Bearer  Security  of any  series is  surrendered  in
exchange  for a  Registered  Security of such series after the close of business
(at an office or agency in a Place of Payment  for such  series) on any  Regular
Record Date and before the opening of business (at such office or agency) on the
next succeeding Interest Payment Date, such Bearer Security shall be surrendered
without the coupon relating to such Interest  Payment Date and interest will not
be payable on such Interest  Payment Date in respect of the Registered  Security
issued in exchange  for such Bearer  Security,  but will be payable  only to the
Holder  of such  coupon  when  due in  accordance  with the  provisions  of this
Indenture.

                  Except as  otherwise  specified  with  respect  to a series of
Securities in accordance with the provisions of Section 301, any interest on any
Registered Security of any series that is payable, but is not punctually paid or
duly  provided  for, on any  Interest  Payment Date  (herein  called  "Defaulted
Interest") shall forthwith cease to be payable to the registered  Holder thereof
on the relevant  Regular  Record Date by virtue of having been such Holder,  and
such  Defaulted  Interest  may be paid by the  Company,  at its election in each
case, as provided in clause (1) or (2) below:

                           (1) The  Company  may  elect to make  payment  of any
         Defaulted  Interest  to the  Persons  in  whose  names  the  Registered
         Securities of such series (or their respective Predecessor  Securities)
         are  registered  at the close of business on a Special  Record Date for
         the  payment of such  Defaulted  Interest,  which shall be fixed in the
         following  manner.  The Company  shall notify the Trustee in writing of
         the amount of Defaulted Interest proposed to be paid on each Registered
         Security of such  series and the date of the  proposed  payment  (which
         shall not be less than 20 days after  such  notice is  received  by the
         Trustee),  and at the same  time the  Company  shall  deposit  with the
         Trustee an amount of money in the currency or currencies, currency unit
         or units or composite currency or currencies in which the Securities of
         such  series are payable  (except as  otherwise  specified  pursuant to
         Section 301 for the  Securities  of such series) equal to the aggregate
         amount  proposed  to be paid in respect of such  Defaulted  Interest or
         shall make arrangements satisfactory to the Trustee for such deposit on
         or prior to the date of the proposed payment, such money when deposited
         to be held in trust for the  benefit of the  Persons  entitled  to such
         Defaulted  Interest as in this clause  provided.  Thereupon the Trustee
         shall fix a  Special  Record  Date for the  payment  of such  Defaulted
         Interest which shall not be more than 15 days and not less than 10 days
         prior to the date of the  proposed  payment  and not less  than 10 days
         after the receipt by the Trustee of the notice of the proposed payment.
         The Trustee shall  promptly  notify the Company of such Special  Record
         Date and,  in the name and at the expense of the  Company,  shall cause
         notice of the  proposed  payment  of such  Defaulted  Interest  and the
         Special Record Date therefor to be mailed, first-class postage prepaid,
         to each Holder of  Registered  Securities of such series at his address
         as it appears in the  Security  Register not less than 10 days prior to
         such Special  Record Date. The Trustee may, in its  discretion,  in the
         name and at the expense of the  Company,  cause a similar  notice to be
         published  at least once in an  Authorized  Newspaper  in each Place of
         Payment,  but such publications  shall not be a condition  precedent to
         the  establishment of such Special Record Date.  Notice of the proposed
         payment of such Defaulted Interest and the Special Record Date therefor
         having been mailed as aforesaid,  such Defaulted Interest shall be paid
         to the Persons in whose names the Registered  Securities of such series
         (or their  respective  Predecessor  Securities)  are  registered at the
         close of  business on such  Special  Record Date and shall no longer be
         payable pursuant to the following clause (2). In case a Bearer Security
         of any series is surrendered for transfer or exchange at the office or

                                       23

<PAGE>



         agency  in a Place  of  Payment  for such  series  after  the  close of
         business at such office or agency on any Special Record Date and before
         the  opening  of  business  at such  office or  agency  on the  related
         proposed date for payment of Defaulted  Interest,  such Bearer Security
         shall be surrendered  without the coupon relating to such proposed date
         of payment and Defaulted  Interest will not be payable on such proposed
         date of  payment  in  respect  of the  Registered  Security  issued  in
         exchange  for such  Bearer  Security,  but will be payable  only to the
         Holder of such coupon when due in  accordance  with the  provisions  of
         this Indenture.

                           (2) The  Company  may make  payment of any  Defaulted
         Interest on the Registered Securities of any series in any other lawful
         manner  not  inconsistent  with  the  requirements  of  any  securities
         exchange on which such  Securities may be listed,  and upon such notice
         as may be required by such  exchange,  if,  after  notice  given by the
         Company to the Trustee of the proposed payment pursuant to this clause,
         such manner of payment shall be deemed practicable by the Trustee.

                  Subject  to the  foregoing  provisions  of  this  Section  and
Section 305, each Security  delivered under this Indenture upon  registration of
transfer of or in exchange for or in lieu of any other  Security shall carry the
rights to interest accrued and unpaid, and to accrue, which were carried by such
other Security.

                  SECTION 308.  Persons Deemed Owners.  Prior to due presentment
of a Registered Security for registration of transfer,  the Company, the Trustee
and any agent of the  Company or the  Trustee may treat the Person in whose name
such  Registered  Security is  registered  as the owner of such Security for the
purpose of receiving payment of principal of (and premium, if any), and (subject
to Sections 305 and 307) interest on, such Registered Security and for all other
purposes  whatsoever,  whether or not such Registered  Security is overdue,  and
neither  the  Company,  the  Trustee nor any agent of the Company or the Trustee
shall be affected by notice to the contrary.

                  Title to any  Bearer  Security  and any  coupons  appertaining
thereto  shall pass by delivery.  The Company,  the Trustee and any agent of the
Company  or the  Trustee  may treat the Holder of any  Bearer  Security  and the
Holder of any coupon as the  absolute  owner of such  Security or coupon for the
purpose of  receiving  payment  thereof or on account  thereof and for all other
purposes  whatsoever,  whether or not such  Security or coupon is  overdue,  and
neither  the  Company,  the  Trustee nor any agent of the Company or the Trustee
shall be affected by notice to the contrary.

                  None of the  Company,  the  Trustee,  any Paying  Agent or the
Security  Registrar will have any  responsibility or liability for any aspect of
the  records  relating to or payments  made on account of  beneficial  ownership
interests  of a  Security  in global  form or for  maintaining,  supervising  or
reviewing any records relating to such beneficial ownership interests.

                  Notwithstanding  the  foregoing,  with  respect  to any global
Security, nothing herein shall prevent the Company, the Trustee, or any agent of
the Company or the  Trustee,  from giving  effect to any written  certification,
proxy or other  authorization  furnished by any  depositary,  as a Holder,  with
respect to such global Security or impair, as between such depositary and owners
of  beneficial  interests in such global  Security,  the  operation of customary
practices  governing  the  exercise  of the  rights of such  depositary  (or its
nominee) as Holder of such global Security.

                  SECTION  309.   Cancellation.   All   Securities  and  coupons
surrendered  for  payment,  redemption,  repayment  at the option of the Holder,
registration  of transfer or  exchange  or for credit  against any sinking  fund
payment shall, if surrendered to any Person other than the Trustee, be delivered
to the Trustee,  and any such  Securities and coupons and Securities and coupons
surrendered  directly  to the  Trustee  for any such  purpose  shall be promptly
cancelled  by it.  The  Company  may at any  time  deliver  to the  Trustee  for
cancellation any Securities  previously  authenticated  and delivered  hereunder
which the Company may have acquired in any manner whatsoever, and may deliver to
the  Trustee  (or  to  any  other  Person  for  delivery  to  the  Trustee)  for
cancellation any Securities previously authenticated hereunder which the Company
has not issued and sold,  and all  Securities  so  delivered  shall be  promptly
cancelled by the Trustee. If the Company shall so acquire any of the Securities,
however, such

                                       24
<PAGE>

acquisition   shall  not  operate  as  a  redemption  or   satisfaction  of  the
indebtedness  represented  by such  Securities  unless  and  until  the same are
surrendered   to  the  Trustee  for   cancellation.   No  Securities   shall  be
authenticated in lieu of or in exchange for any Securities cancelled as provided
in this  Section,  except as expressly  permitted by this  Indenture.  Cancelled
Securities and coupons held by the Trustee shall be destroyed by the Trustee and
the Trustee  shall  deliver a certificate  of such  destruction  to the Company,
unless by a Company Order the Company directs their return to it.

                  SECTION  310.  Computation  of  Interest.  Except as otherwise
specified  as  contemplated  by Section 301 with  respect to  Securities  of any
series, interest on the Securities of each series shall be computed on the basis
of a 360-day year consisting of twelve 30-day months.


                                  ARTICLE FOUR

                           SATISFACTION AND DISCHARGE

                  SECTION 401.  Satisfaction  and Discharge of  Indenture.  This
Indenture  shall upon Company Request cease to be of further effect with respect
to any series of Securities  specified in such Company Request (except as to any
surviving  rights of  registration of transfer or exchange of Securities of such
series  herein  expressly  provided  for and any  right  to  receive  Additional
Amounts,  as provided  in Section  1007),  and the  Trustee,  upon  receipt of a
Company  Order,  and at  the  expense  of  the  Company,  shall  execute  proper
instruments  acknowledging  satisfaction  and discharge of this  Indenture as to
such series when

                           (1)  either

                                    (A)   all    Securities   of   such   series
                  theretofore  authenticated  and delivered and all coupons,  if
                  any, appertaining thereto (other than (i) coupons appertaining
                  to Bearer  Securities  surrendered for exchange for Registered
                  Securities and maturing after such exchange,  whose  surrender
                  is not required or has been waived as provided in Section 305,
                  (ii)  Securities  and coupons of such  series  which have been
                  destroyed, lost or stolen and which have been replaced or paid
                  as provided in Section  306,  (iii)  coupons  appertaining  to
                  Securities  called  for  redemption  and  maturing  after  the
                  relevant  Redemption  Date, whose surrender has been waived as
                  provided in Section 1106,  and (iv)  Securities and coupons of
                  such  series  for whose  payment  money has  theretofore  been
                  deposited  in  trust  or  segregated  and held in trust by the
                  Company and  thereafter  repaid to the  Company or  discharged
                  from such  trust,  as  provided  in  Section  1003)  have been
                  delivered to the Trustee for cancellation; or

                                    (B) all  Securities  of such  series and, in
                  the  case  of (i) or  (ii)  below,  any  coupons  appertaining
                  thereto,   not  theretofore   delivered  to  the  Trustee  for
                  cancellation

                                          (i)      have become due and payable, 
                                                   or

                                          (ii)     will become due and payable 
                                                   at their Stated Maturity 
                                                   within one year, or

                                          (iii)    if redeemable at the option
                                                   of the  Company,  are to be
                                                   called    for    redemption
                                                   within   one   year   under
                                                   arrangements   satisfactory
                                                   to  the   Trustee  for  the
                                                   giving    of    notice   of
                                                   redemption  by the  Trustee
                                                   in  the  name,  and  at the
                                                   expense, of the Company,

                  and the Company,  in the case of (i), (ii) or (iii) above, has
                  irrevocably  deposited  or  caused  to be  deposited  with the
                  Trustee  as funds in trust for such  purpose  an amount in the
                  currency or
                                       25
<PAGE>

                  currencies,  currency  unit or units or composite  currency or
                  currencies in which the Securities of such series are payable,
                  sufficient  to pay and discharge  the entire  indebtedness  on
                  such Securities and such coupons not theretofore  delivered to
                  the Trustee for cancellation,  for principal (and premium,  if
                  any) and  interest,  and any  Additional  Amounts with respect
                  thereto,  to  the  date  of  such  deposit  (in  the  case  of
                  Securities which have become due and payable) or to the Stated
                  Maturity or Redemption Date, as the case may be;

                           (2)  the Company has paid or caused to be paid all 
         other sums payable hereunder by the Company; and

                           (3) the  Company  has  delivered  to the  Trustee  an
         Officers'  Certificate and an Opinion of Counsel, each stating that all
         conditions  precedent  herein provided for relating to the satisfaction
         and  discharge of this  Indenture as to such series have been  complied
         with.

The obligations of the Company to the Trustee and any predecessor  Trustee under
Section 606, the  obligations of the Company to any  Authenticating  Agent under
Section 611 and, if money shall have been deposited with and held by the Trustee
pursuant to subclause (B) of clause (1) of this Section,  the obligations of the
Trustee under  Section 402 and the last  paragraph of Section 1003 shall survive
the satisfaction and discharge of this Indenture.

                  SECTION  402.  Application  of  Trust  Funds.  Subject  to the
provisions of the last paragraph of Section 1003,  all money  deposited with the
Trustee  pursuant  to Section  401 shall be held in trust and  applied by it, in
accordance  with  the  provisions  of  the  Securities,  the  coupons  and  this
Indenture,  to  the  payment,  either  directly  or  through  any  Paying  Agent
(including  the  Company  acting as its own  Paying  Agent) as the  Trustee  may
determine,  to the Persons entitled thereto,  of the principal (and premium,  if
any), and any interest and  Additional  Amounts for whose payment such money has
been  deposited  with or  received  by the  Trustee,  but such money need not be
segregated from other funds except to the extent required by law.


                                  ARTICLE FIVE

                                    REMEDIES

                  SECTION 501. Events of Default.  "Event of Default",  wherever
used herein with respect to any particular  series of Securities,  means any one
of the  following  events  (whatever  the reason  for such Event of Default  and
whether or not it shall be voluntary or  involuntary or be effected by operation
of law or pursuant to any  judgment,  decree or order of any court or any order,
rule or regulation of any administrative or governmental body):

                  (1)  default  in the  payment  of  any  interest  upon  or any
         Additional Amounts payable in respect of any Security of that series or
         of any coupon  appertaining  thereto,  when such  interest,  Additional
         Amounts or coupon  becomes due and  payable,  and  continuance  of such
         default for a period of 30 days; or

                  (2) default in the payment of the principal of (or premium, if
         any, on) any Security of that series when it becomes due and payable at
         its Maturity; or

                  (3) default in the deposit of any sinking fund  payment,  when
         and as due by the terms of any Security of that series; or

                  (4) default in the  performance of, or breach of, any covenant
         of the  Company in this  Indenture  (other than a covenant a default in
         whose  performance  or  whose  breach  is  elsewhere  in  this  Section
         specifically  dealt with or which has been  expressly  included in this
         Indenture  solely for the benefit of a series of Securities  other than
         that series), and continuance of such default or breach for a period of

                                       26

<PAGE>



         60 days after there has been given, by registered or certified mail, to
         the  Company by the  Trustee or to the  Company  and the Trustee by the
         Holders of at least a majority in principal  amount of the  Outstanding
         Securities of that series a written notice  specifying  such default or
         breach and  requiring it to be remedied and stating that such notice is
         a "Notice of Default" hereunder; or

                  (5) a  default  under  any  bond,  debenture,  note  or  other
         evidence  of  indebtedness  of the  Company,  or  under  any  mortgage,
         indenture or other instrument of the Company  (including a default with
         respect to Securities of any series other than that series) under which
         there may be issued or by which there may be secured  any  indebtedness
         of the  Company  (or by any  Subsidiary,  the  repayment  of which  the
         Company has guaranteed or for which the Company is directly responsible
         or liable as obligor  or  guarantor),  whether  such  indebtedness  now
         exists or shall hereafter be created,  which default shall constitute a
         failure to pay an aggregate  principal amount exceeding  $25,000,000 of
         such  indebtedness  when due and payable  after the  expiration  of any
         applicable grace period with respect thereto and shall have resulted in
         such   indebtedness  in  an  aggregate   principal   amount   exceeding
         $25,000,000  becoming or being  declared  due and payable  prior to the
         date on which it would  otherwise have become due and payable,  without
         such indebtedness  having been discharged,  or such acceleration having
         been  rescinded  or  annulled,  within a period of 10 days after  there
         shall have been given,  by registered or certified mail, to the Company
         by the  Trustee or to the  Company and the Trustee by the Holders of at
         least a majority in principal  amount of the Outstanding  Securities of
         that series a written notice  specifying such default and requiring the
         Company  to cause  such  indebtedness  to be  discharged  or cause such
         acceleration  to be  rescinded or annulled and stating that such notice
         is a "Notice of Default" hereunder; or

                  (6) the Company or any Significant  Subsidiary  pursuant to or
         within the meaning of any Bankruptcy Law:

                           (A) commences a voluntary case,

                           (B)  consents  to the  entry of an order  for  relief
                  against it in an involuntary case,

                           (C) consents to the  appointment of a Custodian of it
                  or for all or substantially all of its property, or

                           (D) makes a general assignment for the benefit of its
                  creditors; or

                  (7) a court  of  competent  jurisdiction  enters  an  order or
         decree under any Bankruptcy Law that:

                           (A)  is  for  relief   against  the  Company  or  any
                  Significant Subsidiary in an involuntary case,

                           (B)  appoints  a  Custodian  of  the  Company  or any
                  Significant  Subsidiary  or for  all or  substantially  all of
                  either of its property, or

                           (C)  orders  the  liquidation  of the  Company or any
                  Significant  Subsidiary,  and  the  order  or  decree  remains
                  unstayed and in effect for 90 days; or

                  (8) any  other  Event of  Default  provided  with  respect  to
         Securities of that series.


                                       27
<PAGE>

As used in this Section 501, the term "Bankruptcy Law" means Title 11, U.S. Code
or any  similar  Federal  or State law for the  relief of  debtors  and the term
"Custodian" means any receiver,  trustee, assignee,  liquidator or other similar
official under any Bankruptcy Law.

                  SECTION  502.   Acceleration   of  Maturity;   Rescission  and
Annulment.  If an Event of Default with respect to  Securities  of any series at
the time  Outstanding  occurs and is continuing  (other than an Event of Default
described in Section 501(6) or 501(7)),  then and in every such case the Trustee
or  the  Holders  of not  less  than  a  majority  in  principal  amount  of the
Outstanding  Securities  of that series may declare  the  principal  (or, if any
Securities are Original Issue Discount  Securities or Indexed  Securities,  such
portion of the  principal as may be  specified in the terms  thereof) of all the
Securities  of that  series to be due and  payable  immediately,  by a notice in
writing to the Company  (and to the Trustee if given by the  Holders),  and upon
any such  declaration  such principal or specified  portion thereof shall become
immediately due and payable.  If an Event of Default described in Section 501(6)
or 501(7)  with  respect to any  series of  Securities  at the time  outstanding
occurs, the principal amount of all of the Securities of that series (or, in the
case of any such Original Issue Discount Securities or Indexed Securities,  such
portion  of the  principal  as may be  specified  in  the  terms  thereof)  will
automatically,  and  without  any action by the  Trustee or any Holder  thereof,
become immediately due and payable.

                  At any time  after such a  declaration  of  acceleration  with
respect to  Securities  of any  series  has been made and  before a judgment  or
decree  for  payment  of the  money  due has been  obtained  by the  Trustee  as
hereinafter  in this  Article  provided,  the Holders of a majority in principal
amount of the  Outstanding  Securities of that series,  by written notice to the
Company  and the  Trustee,  may  rescind  and  annul  such  declaration  and its
consequences if:

                  (1) the Company has paid or  deposited  with the Trustee a sum
         sufficient to pay in the currency,  currency unit or composite currency
         in which the Securities of such series are payable (except as otherwise
         specified pursuant to Section 301 for the Securities of such series):

                           (A) all overdue  installments  of interest on and any
                  Additional  Amounts  payable  in  respect  of all  Outstanding
                  Securities of that series and any related coupons,

                           (B) the  principal of (and  premium,  if any, on) any
                  Outstanding  Securities  of that series  which have become due
                  otherwise  than  by  such   declaration  of  acceleration  and
                  interest thereon at the rate or rates borne by or provided for
                  in such Securities,

                           (C) to the extent  that  payment of such  interest is
                  lawful, interest upon overdue installments of interest and any
                  Additional  Amounts at the rate or rates  borne by or provided
                  for in such Securities, and

                           (D)  all  sums  paid  or   advanced  by  the  Trustee
                  hereunder   and   the   reasonable   compensation,   expenses,
                  disbursements  and  advances  of the  Trustee,  its agents and
                  counsel; and

                  (2) all Events of Default with respect to  Securities  of that
         series,  other than the nonpayment of the principal of (or premium,  if
         any) or interest  on  Securities  of that series  which have become due
         solely by such declaration of  acceleration,  have been cured or waived
         as provided in Section 513.

No such  rescission  shall  affect  any  subsequent  default or impair any right
consequent thereon.

                  SECTION  503.   Collection  of  Indebtedness   and  Suits  for
Enforcement by Trustee. The Company covenants that if:


                                       28
<PAGE>

                  (1)  default  is made in the  payment  of any  installment  of
         interest or Additional  Amounts,  if any, on any Security of any series
         and any related coupon when such interest or Additional  Amount becomes
         due and payable and such default continues for a period of 30 days, or

                  (2)  default is made in the  payment of the  principal  of (or
         premium, if any, on) any Security of any series at its Maturity,

then the Company will, upon demand of the Trustee,  pay to the Trustee,  for the
benefit of the Holders of such Securities of such series and coupons,  the whole
amount then due and payable on such  Securities  and coupons for principal  (and
premium, if any) and interest and Additional Amounts thereon, with interest upon
any overdue  principal (and premium,  if any) and, to the extent that payment of
such interest shall be legally  enforceable,  upon any overdue  installments  of
interest or Additional Amounts thereon, if any, at the rate or rates borne by or
provided for in such Securities,  and, in addition thereto,  such further amount
as shall be sufficient to cover the costs and expenses of collection,  including
the  reasonable  compensation,  expenses,  disbursements  and  advances  of  the
Trustee, its agents and counsel.

                  If the Company fails to pay such amounts  forthwith  upon such
demand,  the Trustee,  in its own name and as trustee of an express  trust,  may
institute  a  judicial  proceeding  for the  collection  of the  sums so due and
unpaid,  and may prosecute such proceeding to judgment or final decree,  and may
enforce the same against the Company or any other  obligor upon such  Securities
of such series and  collect the moneys  adjudged or decreed to be payable in the
manner  provided by law out of the property of the Company or any other  obligor
upon such Securities of such series, wherever situated.

                  If an Event of  Default  with  respect  to  Securities  of any
series occurs and is continuing,  the Trustee may in its  discretion  proceed to
protect and enforce  its rights and the rights of the Holders of  Securities  of
such series and any related coupons by such appropriate  judicial proceedings as
the Trustee  shall deem most  effectual  to protect and enforce any such rights,
whether  for the  specific  enforcement  of any  covenant or  agreement  in this
Indenture or in aid of the exercise of any power granted  herein,  or to enforce
any other proper remedy.

                  SECTION 504.  Trustee May File Proofs of Claim. In case of the
pendency   of   any   receivership,    insolvency,   liquidation,    bankruptcy,
reorganization,   arrangement,   adjustment,   composition   or  other  judicial
proceeding  relative to the Company or any other obligor upon the  Securities or
the  property of the Company or of such other  obligor or their  creditors,  the
Trustee  (irrespective  of whether the principal of the Securities of any series
shall  then be due  and  payable  as  therein  expressed  or by  declaration  or
otherwise and  irrespective of whether the Trustee shall have made any demand on
the  Company  for the payment of overdue  principal  of, or premium,  if any, or
interest on, the Securities) shall be entitled and empowered, by intervention in
such proceeding or otherwise:

                           (i) to file and prove a claim  for the whole  amount,
         or such lesser amount as may be provided for in the  Securities of such
         series, of principal (and premium,  if any) and interest and Additional
         Amount,  if any,  owing and unpaid in respect of the  Securities and to
         file such other papers or documents as may be necessary or advisable in
         order to have the claims of the  Trustee  (including  any claim for the
         reasonable  compensation,  expenses,  disbursements and advances of the
         Trustee,  its agents and  counsel)  and of the Holders  allowed in such
         judicial proceeding, and

                           (ii)     to collect and receive any moneys or other 
         property payable or deliverable on any such claims and to distribute 
         the same;

and any custodian,  receiver,  assignee, trustee,  liquidator,  sequestrator (or
other similar official) in any such judicial  proceeding is hereby authorized by
each Holder of  Securities  of such series and coupons to make such  payments to
the Trustee,  and in the event that the Trustee  shall  consent to the making of
such payments  directly to the Holders,  to pay to the Trustee any amount due to
it for the reasonable compensation, expenses, disbursements and advances

                                       29

<PAGE>



of the Trustee and any predecessor  Trustee,  their agents and counsel,  and any
other amounts due the Trustee or any predecessor Trustee under Section 606.

                  Nothing  herein  contained  shall be deemed to  authorize  the
Trustee to authorize or consent to or accept or adopt on behalf of any Holder of
a Security  or coupon any plan of  reorganization,  arrangement,  adjustment  or
composition  affecting  the  Securities  or  coupons or the rights of any Holder
thereof,  or to  authorize  the  Trustee  to vote in respect of the claim of any
Holder of a Security or coupon in any such proceeding.

                  SECTION 505. Trustee May Enforce Claims Without  Possession of
Securities or Coupons.  All rights of action and claims under this  Indenture or
any of the  Securities or coupons may be prosecuted  and enforced by the Trustee
without the  possession of any of the  Securities  or coupons or the  production
thereof in any proceeding relating thereto,  and any such proceeding  instituted
by the Trustee shall be brought in its own name as trustee of an express  trust,
and any  recovery  of judgment  shall,  after  provision  for the payment of the
reasonable  compensation,  expenses,  disbursements and advances of the Trustee,
its agents and counsel,  be for the ratable benefit of the Holders of Securities
and coupons in respect of which such judgment has been recovered.

                  SECTION  506.  Application  of  Money  Collected.   Any  money
collected  by the  Trustee  pursuant  to this  Article  shall be  applied in the
following  order,  at the date or dates fixed by the Trustee and, in case of the
distribution  of such money on  account of  principal  (or  premium,  if any) or
interest and any  Additional  Amounts,  upon  presentation  of the Securities or
coupons, or both, as the case may be, and the notation thereon of the payment if
only partially paid and upon surrender thereof if fully paid:

                           FIRST:  To the payment of all amounts due to the 
         Trustee and any predecessor Trustee under Section 606;

                           SECOND:  To the payment of the  amounts  then due and
         unpaid upon the Securities  and coupons for principal (and premium,  if
         any) and interest and any  Additional  Amounts  payable,  in respect of
         which  or for the  benefit  of which  such  money  has been  collected,
         ratably,  without preference or priority of any kind,  according to the
         aggregate  amounts due and payable on such  Securities  and coupons for
         principal  (and  premium,  if any),  interest and  Additional  Amounts,
         respectively; and

                           THIRD:  To the payment of the remainder, if any, to 
         the Company.

                  SECTION 507. Limitation on Suits. No Holder of any Security of
any  series  or any  related  coupon  shall  have  any  right to  institute  any
proceeding,  judicial or otherwise,  with respect to this Indenture,  or for the
appointment of a receiver or trustee, or for any other remedy hereunder, unless:

                  (1) such Holder has  previously  given  written  notice to the
         Trustee of a continuing Event of Default with respect to the Securities
         of that series;

                  (2) the  Holders  of not less  than a  majority  in  principal
         amount of the  Outstanding  Securities  of that series  shall have made
         written  request to the Trustee to institute  proceedings in respect of
         such Event of Default in its own name as Trustee hereunder;

                  (3)  such  Holder  or  Holders  have  offered  to the  Trustee
         reasonable indemnity against the costs,  expenses and liabilities to be
         incurred in compliance with such request;

                  (4) the Trustee for 60 days after its receipt of such  notice,
         request  and  offer of  indemnity  has  failed  to  institute  any such
         proceeding; and

                                       30
<PAGE>

                  (5) no direction  inconsistent  with such written  request has
         been given to the Trustee during such 60-day period by the Holders of a
         majority in  principal  amount of the  Outstanding  Securities  of that
         series;

it being  understood and intended that no one or more of such Holders shall have
any right in any manner  whatever by virtue of, or by availing of, any provision
of this  Indenture to affect,  disturb or  prejudice  the rights of any other of
such Holders,  or to obtain or to seek to obtain priority or preference over any
other of such  Holders or to enforce any right under this  Indenture,  except in
the manner  herein  provided  and for the equal and ratable  benefit of all such
Holders.

                  SECTION  508.   Unconditional  Right  of  Holders  to  Receive
Principal, Premium, if any, Interest and Additional Amounts. Notwithstanding any
other  provision in this  Indenture,  the Holder of any Security or coupon shall
have the right which is absolute  and  unconditional  to receive  payment of the
principal  of (and  premium,  if any)  and  (subject  to  Sections  305 and 307)
interest on, and any Additional  Amounts in respect of, such Security or payment
of such coupon on the respective due dates  expressed in such Security or coupon
(or, in the case of redemption,  on the  Redemption  Date) and to institute suit
for the  enforcement of any such payment,  and such rights shall not be impaired
without the consent of such Holder.

                  SECTION  509.  Restoration  of  Rights  and  Remedies.  If the
Trustee or any Holder of a Security or coupon has  instituted  any proceeding to
enforce any right or remedy under this  Indenture and such  proceeding  has been
discontinued or abandoned for any reason,  or has been  determined  adversely to
the  Trustee or to such  Holder,  then and in every such case the  Company,  the
Trustee  and the  Holders  of  Securities  and  coupons  shall,  subject  to any
determination  in such  proceeding,  be restored  severally and  respectively to
their former  positions  hereunder and thereafter all rights and remedies of the
Trustee and the Holders  shall  continue as though no such  proceeding  had been
instituted.

                  SECTION  510.  Rights  and  Remedies  Cumulative.   Except  as
otherwise  provided  with respect to the  replacement  or payment of  mutilated,
destroyed, lost or stolen Securities or coupons in the last paragraph of Section
306, no right or remedy herein  conferred  upon or reserved to the Trustee or to
the Holders of  Securities  or coupons is intended to be  exclusive of any other
right or remedy,  and every right and remedy shall,  to the extent  permitted by
law,  be  cumulative  and in  addition  to every  other  right and remedy  given
hereunder or now or  hereafter  existing at law or in equity or  otherwise.  The
assertion or employment of any right or remedy  hereunder,  or otherwise,  shall
not prevent the  concurrent  assertion or  employment  of any other  appropriate
right or remedy.

                  SECTION  511.  Delay  or  Omission  Not  Waiver.  No  delay or
omission of the  Trustee or of any Holder of any  Security or coupon to exercise
any right or remedy  accruing  upon any Event of Default  shall  impair any such
right or  remedy  or  constitute  a waiver of any such  Event of  Default  or an
acquiescence therein.  Every right and remedy given by this Article or by law to
the Trustee or to the Holders may be exercised  from time to time,  and as often
as may be deemed  expedient,  by the Trustee or by the Holders of  Securities or
coupons, as the case may be.

                  SECTION 512. Control by Holders of Securities.  The Holders of
not less than a majority in principal  amount of the  Outstanding  Securities of
any  series  shall  have the  right to  direct  the  time,  method  and place of
conducting any proceeding for any remedy  available to the Trustee or exercising
any trust or power  conferred on the Trustee with respect to the  Securities  of
such series; provided that

                  (1) such  direction  shall not be in conflict with any rule of
         law or with this Indenture,

                  (2) the Trustee may take any other action deemed proper by the
         Trustee which is not inconsistent with such direction, and

                                       31
<PAGE>

                  (3) the Trustee need not take any action which might expose it
         to  personal  liability  or be unduly  prejudicial  to the  Holders  of
         Securities of such series not joining therein.

                  SECTION 513. Waiver of Past Defaults.  The Holders of not less
than a majority in principal amount of the Outstanding  Securities of any series
may on  behalf of the  Holders  of all the  Securities  of such  series  and any
related coupons waive any past default hereunder with respect to such series and
its consequences, except a default

                  (1) in the payment of the principal of (or premium, if any) or
         interest on or Additional Amounts payable in respect of any Security of
         such series or any related coupons, or

                  (2) in respect of a covenant or  provision  hereof which under
         Article  Nine cannot be modified or amended  without the consent of the
         Holder of each Outstanding Security of such series affected.

         Upon any such waiver,  such default shall cease to exist, and any Event
of  Default  arising  therefrom  shall be deemed to have been  cured,  for every
purpose of this Indenture;  but no such waiver shall extend to any subsequent or
other default or Event of Default or impair any right consequent thereon.

                  SECTION  514.  Waiver of Usury,  Stay or Extension  Laws.  The
Company covenants (to the extent that it may lawfully do so) that it will not at
any time insist upon, or plead,  or in any manner  whatsoever  claim or take the
benefit or advantage of, any usury, stay or extension law wherever enacted,  now
or at any time  hereafter  in  force,  which may  affect  the  covenants  or the
performance  of this  Indenture;  and the  Company  (to the  extent  that it may
lawfully do so) hereby  expressly  waives all benefit or  advantage  of any such
law, and covenants that it will not hinder, delay or impede the execution of any
power herein granted to the Trustee, but will suffer and permit the execution of
every such power as though no such law had been enacted.

                  SECTION  515.  Undertaking  for  Costs.  All  parties  to this
Indenture agree, and each Holder of any Security by his acceptance thereof shall
be deemed to have agreed,  that any court may in its discretion  require, in any
suit for the enforcement of any right or remedy under this Indenture,  or in any
suit against the Trustee for any action  taken or omitted by it as Trustee,  the
filing by any party  litigant in such suit of an undertaking to pay the costs of
such suit, and that such court may in its discretion  assess  reasonable  costs,
including  reasonable  attorneys' fees,  against any party litigant in such suit
having due regard to the merits and good faith of the claims or defenses made by
such party  litigant;  but the provisions of this Section shall not apply to any
suit instituted by the Trustee,  to any suit instituted by any Holder,  or group
of Holders, holding in the aggregate more than a majority in principal amount of
the  Outstanding  Securities,  or to any suit  instituted  by any Holder for the
enforcement of the payment of the principal of (or premium,  if any) or interest
on any Security on or after the respective Stated  Maturities  expressed in such
Security (or, in the case of redemption, on or after the Redemption Date).


                                   ARTICLE SIX

                                   THE TRUSTEE

                  SECTION  601.  Notice of  Defaults.  Within 90 days  after the
occurrence  of any  default  hereunder  with  respect to the  Securities  of any
series,  the Trustee shall transmit in the manner and to the extent  provided in
TIA Section  313(c),  notice of such  default  hereunder  known to the  Trustee,
unless such default shall have been cured or waived;  provided,  however,  that,
except in the case of a default in the payment of the  principal of (or premium,
if any) or interest on or any  Additional  Amounts or sinking  fund  installment
with respect to the Securities of such series, the Trustee shall be protected in
withholding such notice if and so long as Responsible Officers of the Trustee in
good faith  determine that the  withholding of such notice is in the interest of
the Holders of the Securities and coupons of such series;  and provided  further
that in the case of any default or breach of the character  specified in Section
501(4) with respect to the Securities and coupons of such series, no such notice
to Holders shall be given

                                       32
<PAGE>

until at least 60 days after the  occurrence  thereof.  For the  purpose of this
Section,  the term "default"  means any event which is, or after notice or lapse
of time or both would become, an Event of Default with respect to the Securities
of such series.

                  SECTION  602.  Certain  Rights  of  Trustee.  Subject  to  the
provisions of TIA Section 315(a) through 315(d):

                           (1) the  Trustee may rely and shall be  protected  in
         acting or  refraining  from  acting upon any  resolution,  certificate,
         statement,  instrument,  opinion,  report, notice, request,  direction,
         consent,  order,  bond,  debenture,  note,  coupon  or  other  paper or
         document  believed  by it to be  genuine  and to have  been  signed  or
         presented by the proper party or parties;

                           (2) any request or direction of the Company mentioned
         herein shall be sufficiently  evidenced by a Company Request or Company
         Order (other than delivery of any  Security,  together with any coupons
         appertaining  thereto,  to the Trustee for  authentication and delivery
         pursuant  to  Section  303 which  shall be  sufficiently  evidenced  as
         provided  therein) and any  resolution of the Board of Directors may be
         sufficiently evidenced by a Board Resolution;

                           (3) whenever in the  administration of this Indenture
         the  Trustee  shall  deem it  desirable  that a  matter  be  proved  or
         established  prior to taking,  suffering or omitting to take any action
         hereunder,  the Trustee  (unless other evidence be herein  specifically
         prescribed)  may, in the absence of bad faith on its part, rely upon an
         Officers' Certificate;

                           (4) the  Trustee  may  consult  with  counsel and the
         advice of such  counsel or any  Opinion  of  Counsel  shall be full and
         complete  authorization  and protection in respect of any action taken,
         suffered  or omitted  by it  hereunder  in good  faith and in  reliance
         thereon;

                           (5) the  Trustee  shall  be under  no  obligation  to
         exercise any of the rights or powers vested in it by this  Indenture at
         the request or  direction  of any of the Holders of  Securities  of any
         series or any related coupons  pursuant to this Indenture,  unless such
         Holders  shall  have  offered to the  Trustee  reasonable  security  or
         indemnity  against the costs,  expenses and liabilities  which might be
         incurred by it in compliance with such request or direction;

                           (6) the  Trustee  shall  not be  bound  to  make  any
         investigation  into the  facts or  matters  stated  in any  resolution,
         certificate,  statement,  instrument, opinion, report, notice, request,
         direction, consent, order, bond, debenture, note, coupon or other paper
         or document, but the Trustee, in its discretion,  may make such further
         inquiry or investigation  into such facts or matters as it may see fit,
         and, if the Trustee  shall  determine to make such  further  inquiry or
         investigation,  it shall be entitled to examine the books,  records and
         premises of the Company, personally or by agent or attorney;

                           (7) the  Trustee  may  execute  any of the  trusts or
         powers  hereunder or perform any duties hereunder either directly or by
         or through agents or attorneys and the Trustee shall not be responsible
         for any  misconduct  or negligence on the part of any agent or attorney
         appointed with due care by it hereunder; and

                           (8) the  Trustee  shall not be liable  for any action
         taken,  suffered or omitted by it in good faith and reasonably believed
         by it to be  authorized  or within the  discretion  or rights or powers
         conferred upon it by this Indenture.

                  The  Trustee  shall not be  required to expend or risk its own
funds or otherwise  incur any financial  liability in the  performance of any of
its duties hereunder, or in the exercise of any of its rights or powers.


                                       33
<PAGE>

                  SECTION  603.  Not  Responsible  for  Recitals  or Issuance of
Securities.  The recitals  contained  herein and in the  Securities,  except the
Trustee's  certificate of  authentication,  and in any coupons shall be taken as
the  statements of the Company,  and neither the Trustee nor any  Authenticating
Agent assumes any  responsibility  for their  correctness.  The Trustee makes no
representations  as to the validity or  sufficiency  of this Indenture or of the
Securities  or  coupons,  except  that the  Trustee  represents  that it is duly
authorized to execute and deliver this  Indenture,  authenticate  the Securities
and   perform   its   obligations   hereunder.   Neither  the  Trustee  nor  the
Authenticating  Agent shall be  accountable  for the use or  application  by the
Company of Securities or the proceeds thereof.

                  SECTION 604.  May Hold  Securities.  The  Trustee,  any Paying
Agent,  Security  Registrar,  Authenticating  Agent  or any  other  agent of the
Company,  in its  individual  or any other  capacity,  may  become  the owner or
pledgee of Securities and coupons and,  subject to TIA Sections  310(b) and 311,
may  otherwise  deal with the  Company  with the same rights it would have if it
were not Trustee, Paying Agent, Security Registrar, Authenticating Agent or such
other agent.

                  SECTION 605. Money Held in Trust. Money held by the Trustee in
trust  hereunder  need not be  segregated  from other funds except to the extent
required by law.  The Trustee  shall be under no  liability  for interest on any
money received by it hereunder except as otherwise agreed with the Company.

                  SECTION  606.  Compensation  and  Reimbursement.  The  Company
agrees:

                           (1)  to  pay  to  the  Trustee   from  time  to  time
         reasonable  compensation  for all  services  rendered  by it  hereunder
         (which  compensation  shall not be limited by any  provision  of law in
         regard to the compensation of a trustee of an express trust);

                           (2) except as otherwise expressly provided herein, to
         reimburse  each of the Trustee  and any  predecessor  Trustee  upon its
         request  for  all  reasonable  expenses,   disbursements  and  advances
         incurred or made by the Trustee in  accordance  with any  provision  of
         this Indenture (including the reasonable  compensation and the expenses
         and disbursements of its agents and counsel),  except any such expense,
         disbursement or advance as may be attributable to its negligence or bad
         faith; and

                           (3)  to  indemnify   each  of  the  Trustee  and  any
         predecessor  Trustee  for, and to hold it harmless  against,  any loss,
         liability or expense  incurred  without  negligence or bad faith on its
         own  part,  arising  out of or in  connection  with the  acceptance  or
         administration  of the trust or trusts  hereunder,  including the costs
         and  expenses of  defending  itself  against any claim or  liability in
         connection  with the  exercise or  performance  of any of its powers or
         duties hereunder.

                  When the  Trustee  incurs  expenses  or  renders  services  in
connection  with an Event of  Default  specified  in  Section  501(6) or Section
501(7),  the  expenses  (including  the  reasonable  charges and expenses of its
counsel)  and the  compensation  for the  services  are  intended to  constitute
expenses of  administration  under any applicable  Federal or state  bankruptcy,
insolvency or other similar law.

                  As security  for the  performance  of the  obligations  of the
Company  under  this  Section,  the  Trustee  shall  have  a lien  prior  to the
Securities upon all property and funds held or collected by the Trustee as such,
except funds held in trust for the payment of principal of (or premium,  if any)
or interest on particular Securities or coupons.

                  The  provisions of this Section shall survive the  termination
of this Indenture.

                  SECTION  607.   Corporate   Trustee   Required;   Eligibility;
Conflicting  Interests.  There shall at all times be a Trustee  hereunder  which
shall be eligible to act as Trustee under TIA Section 310(a)(1) and shall have a
combined  capital  and  surplus  of at least  $50,000,000.  If such  corporation
publishes reports of condition at least

                                       34
<PAGE>

annually,  pursuant to law or the requirements of Federal, state, Territorial or
District of Columbia supervising or examining  authority,  then for the purposes
of this Section,  the combined capital and surplus of such corporation  shall be
deemed to be its  combined  capital  and surplus as set forth in its most recent
report of condition so  published.  If at any time the Trustee shall cease to be
eligible in accordance  with the  provisions  of this  Section,  it shall resign
immediately  in the  manner and with the effect  hereinafter  specified  in this
Article.

                  SECTION  608.   Resignation   and  Removal;   Appointment   of
Successor.  (a) No resignation or removal of the Trustee and no appointment of a
successor  Trustee  pursuant to this Article  shall become  effective  until the
acceptance  of  appointment  by the  successor  Trustee in  accordance  with the
applicable requirements of Section 609.

                  (b) The  Trustee  may  resign at any time with  respect to the
Securities  of one or more  series  by  giving  written  notice  thereof  to the
Company.  If an instrument  of acceptance by a successor  Trustee shall not have
been  delivered to the Trustee within 30 days after the giving of such notice of
resignation,   the  resigning  Trustee  may  petition  any  court  of  competent
jurisdiction for the appointment of a successor Trustee.

                  (c) The Trustee may be removed at any time with respect to the
Securities of any series by Act of the Holders of a majority in principal amount
of the Outstanding Securities of such series delivered to the Trustee and to the
Company.

                  (d)       If at any time:

                           (1)  the  Trustee  shall  fail  to  comply  with  the
         provisions of TIA Section 310(b) after written request  therefor by the
         Company or by any Holder of a Security  who has been a bona fide Holder
         of a Security for at least six months, or

                           (2) the  Trustee  shall  cease to be  eligible  under
         Section 607(a) and shall fail to resign after written request  therefor
         by the Company or by any Holder of a Security  who has been a bona fide
         Holder of a Security for at least six months, or

                           (3) the Trustee  shall become  incapable of acting or
         shall be adjudged a bankrupt or  insolvent or a receiver of the Trustee
         or of its property  shall be appointed or any public officer shall take
         charge or control of the Trustee or of its  property or affairs for the
         purpose of rehabilitation, conservation or liquidation,

then, in any such case, (i) the Company by or pursuant to a Board Resolution may
remove  the  Trustee  and  appoint  a  successor  Trustee  with  respect  to all
Securities,  or (ii) subject to TIA Section 315(e), any Holder of a Security who
has been a bona fide Holder of a Security for at least six months may, on behalf
of himself and all others  similarly  situated,  petition any court of competent
jurisdiction  for the removal of the Trustee with respect to all  Securities and
the appointment of a successor Trustee or Trustees.

                  (e)  If  the  Trustee  shall  resign,  be  removed  or  become
incapable  of acting,  or if a vacancy  shall occur in the office of Trustee for
any reason with respect to the Securities of one or more series, the Company, by
or pursuant to a Board Resolution, shall promptly appoint a successor Trustee or
Trustees  with  respect  to the  Securities  of that or those  series  (it being
understood that any such successor  Trustee may be appointed with respect to the
Securities of one or more or all of such series and that at any time there shall
be only one Trustee with respect to the  Securities of any  particular  series).
If,  within one year after such  resignation,  removal or  incapability,  or the
occurrence of such vacancy,  a successor  Trustee with respect to the Securities
of any  series  shall  be  appointed  by Act of the  Holders  of a  majority  in
principal  amount of the Outstanding  Securities of such series delivered to the
Company and the retiring  Trustee,  the  successor  Trustee so appointed  shall,
forthwith upon its acceptance of such appointment,  become the successor Trustee
with respect to the  Securities of such series and to that extent  supersede the
successor Trustee appointed by the Company. If no successor Trustee with respect
to the Securities of any series

                                       35
<PAGE>

shall have been so  appointed  by the Company or the Holders of  Securities  and
accepted appointment in the manner hereinafter provided any Holder of a Security
who has been a bona fide  Holder of a Security  of such  series for at least six
months may, on behalf of himself and all others similarly situated, petition any
court of competent  jurisdiction for the appointment of a successor Trustee with
respect to Securities of such series.

                  (f) The Company shall give notice of each resignation and each
removal of the Trustee  with  respect to the  Securities  of any series and each
appointment of a successor  Trustee with respect to the Securities of any series
in the manner  provided for notices to the Holders of Securities in Section 106.
Each notice shall include the name of the successor  Trustee with respect to the
Securities of such series and the address of its Corporate Trust Office.

                  SECTION 609.  Acceptance of Appointment  by Successor.  (a) In
case of the  appointment  hereunder  of a successor  Trustee with respect to all
Securities,  every such successor Trustee shall execute, acknowledge and deliver
to  the  Company  and to the  retiring  Trustee  an  instrument  accepting  such
appointment,  and thereupon the  resignation or removal of the retiring  Trustee
shall become effective and such successor Trustee, without any further act, deed
or  conveyance,  shall  become  vested with all the rights,  powers,  trusts and
duties  of the  retiring  Trustee;  but,  upon  request  of the  Company  or the
successor  Trustee,  such retiring  Trustee shall,  upon payment of its charges,
execute and deliver an instrument transferring to such successor Trustee all the
rights,  powers  and trusts of the  retiring  Trustee,  and shall  duly  assign,
transfer  and deliver to such  successor  Trustee all property and money held by
such retiring  Trustee  hereunder,  subject  nevertheless  to its claim, if any,
provided for in Section 606.

                  (b)  In  case  of the  appointment  hereunder  of a  successor
Trustee with respect to the Securities of one or more (but not all) series,  the
Company,  the retiring  Trustee and each  successor  Trustee with respect to the
Securities  of one or  more  series  shall  execute  and  deliver  an  indenture
supplemental  hereto,  pursuant to Article Nine hereof,  wherein each  successor
Trustee  shall  accept  such  appointment  and  which  (1)  shall  contain  such
provisions as shall be necessary or desirable to transfer and confirm to, and to
vest in, each successor Trustee all the rights, powers, trusts and duties of the
retiring Trustee with respect to the Securities of that or those series to which
the appointment of such successor  Trustee relates,  (2) if the retiring Trustee
is not retiring with respect to all Securities, shall contain such provisions as
shall be deemed  necessary or desirable to confirm that all the rights,  powers,
trusts and duties of the retiring Trustee with respect to the Securities of that
or those series as to which the retiring  Trustee is not retiring shall continue
to be vested in the retiring Trustee,  and (3) shall add to or change any of the
provisions of this  Indenture as shall be necessary to provide for or facilitate
the  administration  of the trusts hereunder by more than one Trustee,  it being
understood  that  nothing  herein  or  in  such  supplemental   indenture  shall
constitute  such  Trustees  co-trustees  of the same  trust  and that  each such
Trustee shall be trustee of a trust or trusts hereunder  separate and apart from
any trust or trusts hereunder  administered by any other such Trustee;  and upon
the execution and delivery of such  supplemental  indenture the  resignation  or
removal of the retiring  Trustee shall become  effective to the extent  provided
therein  and each such  successor  Trustee,  without any  further  act,  deed or
conveyance,  shall become vested with all the rights,  powers, trusts and duties
of the retiring  Trustee with respect to the  Securities of that or those series
to which the appointment of such successor  Trustee relates;  but, on request of
the Company or any successor  Trustee,  such retiring Trustee shall duly assign,
transfer  and deliver to such  successor  Trustee all property and money held by
such retiring Trustee  hereunder with respect to the Securities of that or those
series to which the appointment of such successor Trustee relates.

                  (c) Upon request of any such  successor  Trustee,  the Company
shall execute any and all instruments  for more fully and certainly  vesting in,
and  confirming  to such  successor  Trustee all such rights,  powers and trusts
referred to in paragraph (a) or (b) of this Section, as the case may be.

                  (d) No successor  Trustee shall accept its appointment  unless
at the time of such  acceptance  such  successor  Trustee shall be qualified and
eligible under this Article.

                  SECTION 610. Merger,  Conversion,  Consolidation or Succession
to Business.  Any corporation  into which the Trustee may be merged or converted
or with which it may be consolidated, or any corporation

                                       36
<PAGE>

resulting  from any merger,  conversion  or  consolidation  to which the Trustee
shall be a party, or any corporation  succeeding to all or substantially  all of
the  corporate  trust  business of the  Trustee,  shall be the  successor of the
Trustee  hereunder;  provided such corporation shall be otherwise  qualified and
eligible under this Article, without the execution or filing of any paper or any
further act on the part of any of the parties hereto.  In case any Securities or
coupons shall have been authenticated, but not delivered, by the Trustee then in
office,   any  successor  by  merger,   conversion  or   consolidation  to  such
authenticating  Trustee may adopt such authentication and deliver the Securities
or coupons so  authenticated  with the same effect as if such successor  Trustee
had itself  authenticated such Securities or coupons.  In case any Securities or
coupons shall not have been authenticated by such predecessor  Trustee, any such
successor  Trustee may authenticate  and deliver such Securities or coupons,  in
either its own name or that of its predecessor Trustee,  with the full force and
effect which this Indenture  provides for the certificate of  authentication  of
the Trustee.

                  SECTION 611. Appointment of Authentication  Agent. At any time
when any of the  Securities  remain  Outstanding,  the  Trustee  may  appoint an
Authenticating  Agent or Agents with respect to one or more series of Securities
which  shall be  authorized  to act on behalf  of the  Trustee  to  authenticate
Securities  of such series  issued upon  exchange,  registration  of transfer or
partial redemption or repayment thereof,  and Securities so authenticated  shall
be entitled to the benefits of this  Indenture and shall be valid and obligatory
for  all  purposes  as if  authenticated  by the  Trustee  hereunder.  Any  such
appointment  shall  be  evidenced  by  an  instrument  in  writing  signed  by a
Responsible Officer of the Trustee, a copy of which instrument shall be promptly
furnished to the Company.  Wherever  reference is made in this  Indenture to the
authentication  and  delivery  of  Securities  by the  Trustee or the  Trustee's
certificate  of  authentication,  such  reference  shall be  deemed  to  include
authentication and delivery on behalf of the Trustee by an Authenticating  Agent
and a  certificate  of  authentication  executed  on behalf of the Trustee by an
Authenticating  Agent.  Each  Authenticating  Agent shall be  acceptable  to the
Company and, except as may other wise be provided pursuant to Section 301, shall
at all  times be a bank or trust  company  or  corporation  organized  and doing
business and in good standing  under the laws of the United States of America or
of any State or the District of Columbia,  authorized  under such laws to act as
Authenticating  Agent,  having a combined  capital  and surplus of not less than
$50,000,000  and  subject  to  supervision  or  examination  by federal or state
authorities.  If such  Authenticating  Agent  publishes  reports of condition at
least annually, pursuant to law or the requirements of the aforesaid supervising
or  examining  authority,  then for the purposes of this  Section,  the combined
capital  and  surplus  of such  Authenticating  Agent  shall be deemed to be its
combined capital and surplus as set forth in its most recent report of condition
so  published.  In case at any time an  Authenticating  Agent  shall cease to be
eligible in accordance with the provisions of this Section,  such Authenticating
Agent shall resign  immediately  in the manner and with the effect  specified in
this Section.

                  Any  corporation  into  which an  Authenticating  Agent may be
merged or converted  or with which it may be  consolidated,  or any  corporation
resulting  from  any  merger,   conversion  or   consolidation   to  which  such
Authenticating  Agent shall be a party,  or any  corporation  succeeding  to the
corporate agency or corporate trust business of an Authenticating  Agent,  shall
continue to be an  Authenticating  Agent,  provided  such  corporation  shall be
otherwise  eligible  under this Section,  without the execution or filing of any
paper or further act on the part of the Trustee or the Authenticating Agent.

                  An  Authenticating  Agent for any series of Securities  may at
any time resign by giving  written notice of resignation to the Trustee for such
series and to the Company.  The Trustee for any series of Securities  may at any
time terminate the agency of an Authenticating Agent by giving written notice of
termination to such Authenticating Agent and to the Company. Upon receiving such
a notice of resignation or upon such a termination,  or in case at any time such
Authenticating  Agent  shall  cease  to  be  eligible  in  accordance  with  the
provisions of this Section,  the Trustee for such series may appoint a successor
Authenticating  Agent  which shall be  acceptable  to the Company and shall give
notice of such  appointment  to all  Holders of  Securities  of the series  with
respect to which such Authenticating Agent will serve in the manner set forth in
Section  106.  Any  successor   Authenticating  Agent  upon  acceptance  of  its
appointment hereunder shall become vested with all the rights, powers and duties
of its  predecessor  hereunder,  with like effect as if  originally  named as an
Authenticating  Agent  herein.  No  successor   Authenticating  Agent  shall  be
appointed unless eligible under the provisions of this Section.

                                       37
<PAGE>

                  The Company  agrees to pay to each  Authenticating  Agent from
time to time reasonable  compensation including  reimbursement of its reasonable
expenses for its services under this Section.

                  If an  appointment  with respect to one or more series is made
pursuant  to this  Section,  the  Securities  of such  series may have  endorsed
thereon,   in  addition  to  or  in  lieu  of  the  Trustee's   certificate   of
authentication,  an alternate certificate of authentication substantially in the
following form:

                                    This is one of the  Securities of the series
                  designated   therein  referred  to  in  the   within-mentioned
                  Indenture.

                           -----------------------------------
                                               as Trustee


                           By:_________________________________
                                       as Authenticating Agent


                           By:__________________________________
                                           Authorized Officer


                                  ARTICLE SEVEN

                HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

                  SECTION  701.  Disclosure  of Names and  Addresses of Holders.
Every Holder of Securities or coupons, by receiving and holding the same, agrees
with the Company and the  Trustee  that  neither the Company nor the Trustee nor
any  Authenticating  Agent nor any Paying Agent nor any Security Registrar shall
be held  accountable  by reason of the  disclosure of any  information as to the
names and addresses of the Holders of Securities in accordance  with TIA Section
312, regardless of the source from which such information was derived,  and that
the Trustee  shall not be held  accountable  by reason of mailing  any  material
pursuant to a request made under TIA Section 312(b).

                  SECTION 702.  Reports by Trustee.  Within 60 days after May 15
of each year  commencing  with the first  May 15 after  the  first  issuance  of
Securities pursuant to this Indenture, the Trustee shall transmit by mail to all
Holders of Securities as provided in TIA Section  313(c) a brief report dated as
of such May 15 if required by TIA Section 313(a).

                  SECTION 703.  Reports by Company.  The Company will:

                           (1) file with the  Trustee,  within 15 days after the
         Company is required to file the same with the Commission, copies of the
         annual reports and of the information,  documents and other reports (or
         copies of such portions of any of the foregoing as the  Commission  may
         from time to time by rules and regulations prescribe) which the Company
         may be required to file with the  Commission  pursuant to Section 13 or
         Section  15(d)  of the  Securities  Exchange  Act of 1934;  or,  if the
         Company  is not  required  to file  information,  documents  or reports
         pursuant to either of such Sections, then it will file with the Trustee
         and the Commission, in accordance with rules and regulations prescribed
         from  time to time by the  Commission,  such of the  supplementary  and
         periodic  information,  documents  and  reports  which may be  required
         pursuant  to  Section  13 of the  Securities  Exchange  Act of  1934 in
         respect of a security  listed and  registered on a national  securities
         exchange  as may be  prescribed  from  time to time in such  rules  and
         regulations;


                                       38

<PAGE>



                           (2) file  with the  Trustee  and the  Commission,  in
         accordance with rules and  regulations  prescribed from time to time by
         the Commission, such additional information, documents and reports with
         respect to compliance by the Company with the  conditions and covenants
         of this  Indenture  as may be required  from time to time by such rules
         and regulations; and

                           (3)  transmit by mail to the  Holders of  Securities,
         within 30 days after the filing thereof with the Trustee, in the manner
         and to the extent provided in TIA Section 313(c), such summaries of any
         information,  documents and reports required to be filed by the Company
         pursuant to  paragraphs  (1) and (2) of this section as may be required
         by  rules  and  regulations   prescribed  from  time  to  time  by  the
         Commission.

                  SECTION 704. Company to Furnish to Trustee Names and Addresses
of Holders. The Company will furnish or cause to be furnished to the Trustee:

                  (a)  semi-annually,  not later than 25 days after the  Regular
Record Date for interest for each series of Securities,  a list, in such form as
the Trustee may reasonably require, of the names and addresses of the Holders of
Registered Securities of such series as of such Regular Record Date, or if there
is  no  Regular  Record  Date  for  interest  for  such  series  of  Securities,
semiannually,  upon  such  dates as are set  forth in the  Board  Resolution  or
indenture supplemental hereto authorizing such series, and

                  (b) at such other times as the Trustee may request in writing,
within 30 days after the receipt by the Company of any such  request,  a list of
similar  form and  content  as of a date not more than 15 days prior to the time
such list is furnished;

provided,  however,  that, so long as the Trustee is the Security Registrar,  no
such list shall be required to be furnished.

                                  ARTICLE EIGHT

                CONSOLIDATION, MERGER, SALE, LEASE OR CONVEYANCE

                  SECTION 801.  Consolidations and Mergers of Company and Sales,
Leases and Conveyances Permitted Subject to Certain Conditions.  The Company may
consolidate  with,  or sell,  lease or convey  all or  substantially  all of its
assets to, or merge  with or into any other  corporation;  provided  that in any
such case,  (i) either the Company shall be the continuing  corporation,  or the
successor  corporation  shall be a corporation  organized and existing under the
laws of the United  States or a State  thereof  and such  successor  corporation
shall  expressly  assume the due and punctual  payment of the  principal of (and
premium,  if any) and any interest  (including all Additional  Amounts,  if any,
payable  pursuant to Section 1007) on all of the Securities,  according to their
tenor,  and  the due  and  punctual  performance  and  observance  of all of the
covenants  and  conditions  of this  Indenture to be performed by the Company by
supplemental indenture,  complying with Article Nine hereof, satisfactory to the
Trustee,  executed  and  delivered to the Trustee by such  corporation  and (ii)
immediately   after  giving  effect  to  such   transaction   and  treating  any
indebtedness  which becomes an obligation of the Company or any  Subsidiary as a
result thereof as having been incurred by the Company or such  Subsidiary at the
time of such transaction,  no Event of Default, and no event which, after notice
or the lapse of time,  or both,  would  become an Event of  Default,  shall have
occurred and be continuing.

                  SECTION 802.  Rights and Duties of Successor  Corporation.  In
case of any such consolidation,  merger,  sale, lease or conveyance and upon any
such assumption by the successor  corporation,  such successor corporation shall
succeed to and be substituted for the Company, with the same effect as if it had
been  named  herein  as the  party  of  the  first  part,  and  the  predecessor
corporation,  except in the event of a lease,  shall be  relieved of any further
obligation under this Indenture and the Securities.  Such successor  corporation
thereupon may cause to be signed, and may issue either in its own name or in the
name of the Company, any or all of the Securities issuable

                                       39
<PAGE>

hereunder  which  theretofore  shall not have been  signed  by the  Company  and
delivered to the Trustee;  and,  upon the order of such  successor  corporation,
instead of the Company, and subject to all the terms, conditions and limitations
in this Indenture  prescribed,  the Trustee shall authenticate and shall deliver
any  Securities  which  previously  shall have been signed and  delivered by the
officers of the Company to the Trustee for  authentication,  and any  Securities
which  such  successor  corporation  thereafter  shall  cause to be  signed  and
delivered to the Trustee for that purpose. All the Securities so issued shall in
all respects  have the same legal rank and benefit  under this  Indenture as the
Securities theretofore or thereafter issued in accordance with the terms of this
Indenture  as though all of such  Securities  had been issued at the date of the
execution hereof.

                  In case of any  such  consolidation,  merger,  sale,  lease or
conveyance,  such changes in phraseology  and form (but not in substance) may be
made in the Securities thereafter to be issued as may be appropriate.

                  SECTION 803. Officers' Certificate and Opinion of Counsel. Any
consolidation,  merger, sale, lease or conveyance permitted under Section 801 is
also subject to the condition that the Trustee receive an Officers'  Certificate
and an Opinion of Counsel  to the effect  that any such  consolidation,  merger,
sale, lease or conveyance, and the assumption of the Company's obligations under
this  Indenture by any successor  corporation,  complies with the  provisions of
this Article and that all conditions  precedent  herein provided for relating to
such transaction have been complied with.

                                  ARTICLE NINE

                             SUPPLEMENTAL INDENTURES

                  SECTION  901.  Supplemental   Indentures  Without  Consent  of
Holders.  Without  the  consent of any Holders of  Securities  or  coupons,  the
Company, when authorized by or pursuant to a Board Resolution,  and the Trustee,
at any  time  and  from  time to time,  may  enter  into one or more  indentures
supplemental  hereto,  in  form  satisfactory  to the  Trustee,  for  any of the
following purposes:

                  (1) to  evidence  the  succession  of  another  Person  to the
         Company and the  assumption  by any such  successor of the covenants of
         the Company herein and in the Securities contained; or

                  (2) to add to the  covenants of the Company for the benefit of
         the Holders of all or any series of Securities  (and if such  covenants
         are to be for the  benefit  of less  than  all  series  of  Securities,
         stating that such covenants are expressly being included solely for the
         benefit  of such  series)  or to  surrender  any right or power  herein
         conferred upon the Company; or

                  (3) to add any additional Events of Default for the benefit of
         the Holders of all or any series of  Securities  (and if such Events of
         Default  are  to be  for  the  benefit  of  less  than  all  series  of
         Securities,  stating  that such Events of Default are  expressly  being
         included  solely for the benefit of such  series);  provided,  however,
         that  in  respect  of  any  such  additional  Events  of  Default  such
         supplemental  indenture  may provide for a  particular  period of grace
         after default  (which period may be shorter or longer than that allowed
         in the  case  of  other  defaults)  or  may  provide  for an  immediate
         enforcement  upon such default or may limit the  remedies  available to
         the Trustee  upon such default or may limit the right of the Holders of
         a majority in  aggregate  principal  amount of that or those  series of
         Securities  to which such  additional  Events of Default apply to waive
         such default; or

                  (4)  to add  to or  change  any  of  the  provisions  of  this
         Indenture to provide that Bearer  Securities  may be  registrable as to
         principal,  to change or eliminate any  restrictions  on the payment of
         principal of or any premium or interest on Bearer Securities, to permit
         Bearer  Securities to be issued in exchange for Registered  Securities,
         to  permit  Bearer  Securities  to be  issued in  exchange  for  Bearer
         Securities of other authorized denominations or to permit or facilitate
         the issuance of Securities in

                                       40
<PAGE>

         uncertificated form; provided, that any such action shall not adversely
         affect the  interests of the Holders of Securities of any series or any
         related coupons in any material respect; or

                  (5) to  change  or  eliminate  any of the  provisions  of this
         Indenture;  provided that any such change or  elimination  shall become
         effective  only when  there is no  Security  Outstanding  of any series
         created prior to the execution of such supplemental  indenture which is
         entitled to the benefit of such provision; or

                  (6) to secure the Securities; or

                  (7) to establish the form or terms of Securities of any series
         and any related coupons as permitted by Sections 201 and 301, including
         the provisions and procedures  relating to Securities  convertible into
         Common Shares or Preferred  Shares of the Company,  as the case may be;
         or

                  (8) to evidence and provide for the  acceptance of appointment
         hereunder by a successor  Trustee with respect to the Securities of one
         or more  series and to add to or change any of the  provisions  of this
         Indenture  as shall be  necessary  to  provide  for or  facilitate  the
         administration of the trusts hereunder by more than one Trustee; or

                  (9) to cure  any  ambiguity,  to  correct  or  supplement  any
         provision herein which may be defective or inconsistent  with any other
         provision  herein,  or to make any other  provisions  with  respect  to
         matters or questions  arising under this  Indenture  which shall not be
         inconsistent  with the  provisions  of this  Indenture;  provided  such
         provisions  shall not adversely  affect the interests of the Holders of
         Securities  of  any  series  or any  related  coupons  in any  material
         respect; or

                  (10) to supplement  any of the provisions of this Indenture to
         such  extent  as  shall  be  necessary  to  permit  or  facilitate  the
         defeasance  and  discharge  of any  series of  Securities  pursuant  to
         Sections  401,  1402 and 1403;  provided that any such action shall not
         adversely  affect the  interests of the Holders of  Securities  of such
         series and any related coupons or any other series of Securities in any
         material respect.

                  SECTION 902. Supplemental  Indentures with Consent of Holders.
With the consent of the Holders of not less than a majority in principal  amount
of all Outstanding Securities affected by such supplemental indenture, by Act of
said  Holders  delivered  to the  Company and the  Trustee,  the  Company,  when
authorized by or pursuant to a Board Resolution,  and the Trustee may enter into
an indenture  or  indentures  supplemental  hereto for the purpose of adding any
provisions to or changing in any manner or eliminating  any of the provisions of
this  Indenture  or of  modifying  in any manner  the  rights of the  Holders of
Securities and any related coupons under this Indenture; provided, however, that
no such supplemental  indenture shall, without the consent of the Holder of each
Outstanding Security affected thereby:

                  (1)  change  the  Stated  Maturity  of  the  principal  of (or
         premium, if any, on) or any installment of principal of or interest on,
         any  Security;  or reduce the principal  amount  thereof or the rate or
         amount of interest thereon or any Additional Amounts payable in respect
         thereof,  or any premium payable upon the redemption thereof, or change
         any  obligation of the Company to pay  Additional  Amounts  pursuant to
         Section 1007 (except as contemplated by Section 801(i) and permitted by
         Section  901(1)),  or reduce the amount of the principal of an Original
         Issue  Discount   Security  that  would  be  due  and  payable  upon  a
         declaration of acceleration of the Maturity thereof pursuant to Section
         502 or the amount  thereof  provable in bankruptcy  pursuant to Section
         504, or  adversely  affect any right of  repayment at the option of the
         Holder of any Security,  or change any Place of Payment  where,  or the
         currency or currencies, currency unit or units or composite currency or
         currencies  in which,  any  Security  or any  premium  or the  interest
         thereon  is  payable,  or impair  the right to  institute  suit for the
         enforcement of any such payment on or after the Stated Maturity thereof
         (or,  in the case of  redemption  or  repayment  at the  option  of the
         Holder,  on or after the Redemption  Date or the Repayment Date, as the
         case may be), or

                                       41
<PAGE>

                  (2)  reduce  the   percentage  in  principal   amount  of  the
         Outstanding  Securities of any series,  the consent of whose Holders is
         required for any such supplemental  indenture,  or the consent of whose
         Holders is  required  for any waiver  with  respect to such  series (or
         compliance  with  certain  provisions  of  this  Indenture  or  certain
         defaults  hereunder  and  their  consequences)  provided  for  in  this
         Indenture,  or reduce the  requirements  of Section  1504 for quorum or
         voting, or

                  (3) modify any of the provisions of this Section,  Section 513
         or Section 1008,  except to increase the required  percentage to effect
         such  action  or to  provide  that  certain  other  provisions  of this
         Indenture  cannot be  modified  or waived  without  the  consent of the
         Holder of each Outstanding Security affected thereby.

                  It shall not be  necessary  for any Act of Holders  under this
Section to approve the particular form of any proposed  supplemental  indenture,
but it shall be sufficient if such Act shall approve the substance thereof.

                  A  supplemental  indenture  which  changes or  eliminates  any
covenant or other  provision of this Indenture which has expressly been included
solely for the benefit of one or more particular series of Securities,  or which
modifies the rights of the Holders of  Securities of such series with respect to
such covenant or other provision, shall be deemed not to affect the rights under
this Indenture of the Holders of Securities of any other series.

                  SECTION  903.   Execution  of  Supplemental   Indentures.   In
executing,  or accepting  the  additional  trusts  created by, any  supplemental
indenture  permitted by this Article or the  modification  thereby of the trusts
created by this Indenture,  the Trustee shall be entitled to receive,  and shall
be fully  protected  in relying  upon,  an Opinion of Counsel  stating  that the
execution  of such  supplemental  indenture is  authorized  or permitted by this
Indenture.  The Trustee may, but shall not be obligated  to, enter into any such
supplemental  indenture  which  affects  the  Trustee's  own  rights,  duties or
immunities under this Indenture or otherwise.

                  SECTION  904.  Effect  of  Supplemental  Indentures.  Upon the
execution of any supplemental indenture under this Article, this Indenture shall
be modified in accordance therewith and such supplemental indenture shall form a
part  of this  Indenture  for all  purposes;  and  every  Holder  of  Securities
theretofore  or  thereafter  authenticated  and  delivered  hereunder and of any
coupon appertaining thereto shall be bound thereby.

                  SECTION  905.  Conformity  with  Trust  Indenture  Act.  Every
supplemental  indenture  executed  pursuant to this Article shall conform to the
requirements of the Trust Indenture Act as then in effect.

                  SECTION  906.   Reference  in   Securities   to   Supplemental
Indentures.  Securities  of any series  authenticated  and  delivered  after the
execution of any supplemental indenture pursuant to this Article may, and shall,
if required by the Trustee,  bear a notation in form  approved by the Trustee as
to any matter provided for in such supplemental  indenture. If the Company shall
so determine,  new  Securities  of any series so modified as to conform,  in the
opinion of the Trustee and the Company,  to any such supplemental  indenture may
be prepared and executed by the Company and  authenticated  and delivered by the
Trustee in exchange for Outstanding Securities of such series.

                                   ARTICLE TEN

                                    COVENANTS

                  SECTION 1001. Payment of Principal,  Premium, if any, Interest
and Additional Amounts.  The Company covenants and agrees for the benefit of the
Holders of each series of Securities  that it will duly and  punctually  pay the
principal of (and premium,  if any) and interest on and any  Additional  Amounts
payable in respect of the Securities of that series in accordance with the terms
of such  series  of  Securities,  any  coupons  appertaining  thereto  and  this
Indenture.  Unless  otherwise  specified  as  contemplated  by Section  301 with
respect to any series of  Securities,  any  interest  due on and any  Additional
Amounts  payable in respect of Bearer  Securities on or before  Maturity,  other
than Additional  Amounts, if any, payable as provided in Section 1007 in respect
of principal of (or

                                       42
<PAGE>

premium,  if any, on) such a Security,  shall be payable only upon  presentation
and  surrender  of the several  coupons for such  interest  installments  as are
evidenced  thereby as they severally  mature.  Unless  otherwise  specified with
respect to  Securities  of any series  pursuant to Section 301, at the option of
the Company,  all payments of principal  may be paid by check to the  registered
Holder of the  Registered  Security or other  person  entitled  thereto  against
surrender of such Security.

                  SECTION 1002.  Maintenance of Office or Agency.  If Securities
of a series are  issuable  only as  Registered  Securities,  the  Company  shall
maintain  in each Place of Payment  for any  series of  Securities  an office or
agency  where  Securities  of that series may be presented  or  surrendered  for
payment or conversion,  where  Securities of that series may be surrendered  for
registration  of transfer or exchange,  and where notices and demands to or upon
the Company in respect of the  Securities of that series and this  Indenture may
be served.  If  Securities  of a series are issuable as Bearer  Securities,  the
Company will maintain: (A) in the Borough of Manhattan, The City of New York, an
office or agency where any Registered Securities of that series may be presented
or  surrendered  for payment or conversion,  where any Registered  Securities of
that series may be surrendered for registration of transfer, where Securities of
that series may be  surrendered  for  exchange,  where notices and demands to or
upon the Company in respect of the  Securities of that series and this Indenture
may be served and where Bearer Securities of that series and related coupons may
be presented  or  surrendered  for payment or  conversion  in the  circumstances
described in the following  paragraph  (and not  otherwise);  (B) subject to any
laws or regulations  applicable  thereto,  in a Place of Payment for that series
which is located outside the United States, an office or agency where Securities
of that series and related  coupons may be presented and surrendered for payment
(including  payment of any  Additional  Amounts  payable on  Securities  of that
series pursuant to Section 1007) or conversion;  provided,  however, that if the
Securities  of that series are listed on the  Luxembourg  Stock  Exchange or any
other stock exchange  located  outside the United States and such stock exchange
shall so require, the Company will maintain a Paying Agent for the Securities of
that series in Luxembourg or any other required city located  outside the United
States,  as the case may be, so long as the Securities of that series are listed
on such exchange; and (C) subject to any laws or regulations applicable thereto,
in a Place of Payment  for that  series  located  outside  the United  States an
office  or  agency  where  any  Registered  Securities  of  that  series  may be
surrendered for registration of transfer, where Securities of that series may be
surrendered for exchange and where notices and demands to or upon the Company in
respect of the Securities of that series and this  Indenture may be served.  The
Company will give prompt written notice to the Trustee of the location,  and any
change in the  location,  of each  such  office  or  agency.  If at any time the
Company shall fail to maintain any such required  office or agency or shall fail
to furnish the Trustee with the address thereof, such presentations, surrenders,
notices and demands may be made or served at the  Corporate  Trust Office of the
Trustee,  except that Bearer  Securities of that series and the related  coupons
may  be  presented  and  surrendered  for  payment  (including  payment  of  any
Additional  Amounts  payable on Bearer  Securities  of that  series  pursuant to
Section 1007) or conversion at the offices  specified in the Security in London,
England,  and the Company hereby  appoints the same as its agent to receive such
respective  presentations,  surrenders,  notices  and  demands,  and the Company
hereby  appoints  the  Trustee  its  agent to  receive  all such  presentations,
surrenders, notices and demands.

                  Unless  otherwise  specified  with  respect to any  Securities
pursuant  to Section  301,  no payment of  principal,  premium or interest on or
Additional  Amounts in respect of Bearer  Securities shall be made at any office
or agency of the Company in the United  States or by check mailed to any address
in the United States or by transfer to an account maintained with a bank located
in the United States; provided, however, that, if the Securities of a series are
payable in Dollars,  payment of principal of and any premium and interest on any
Bearer Security  (including any Additional Amounts payable on Securities of such
series  pursuant to Section  1007) shall be made at the office of the  Company's
Paying  Agent in the City of Boston,  if (but only if) payment in Dollars of the
full amount of such principal,  premium,  interest or Additional Amounts, as the
case may be, at all offices or agencies outside the United States maintained for
such purpose by the Company in  accordance  with this  Indenture,  is illegal or
effectively precluded by exchange controls or other similar restrictions.

                  The Company may from time to time  designate one or more other
offices or agencies  where the Securities of one or more series may be presented
or  surrendered  for any or all of such  purposes,  and  may  from  time to time
rescind  such  designation;  provided,  however,  that  no such  designation  or
rescission shall in any manner

                                       43
<PAGE>

relieve  the  Company  of its  obligation  to  maintain  an  office or agency in
accordance  with the  requirements  set forth above for Securities of any series
for such purposes. The Company will give prompt written notice to the Trustee of
any such designation or rescission and of any change in the location of any such
other  office  or  agency.  Unless  otherwise  specified  with  respect  to  any
Securities  pursuant to Section 301 with respect to a series of Securities,  the
Company  hereby  designates  as a Place of Payment for each series of Securities
the  office  or agency  of the  Company  in the City of  Boston,  and  initially
appoints the Trustee at its Corporate  Trust Office as Paying Agent in such city
and as its agent to receive  all such  presentations,  surrenders,  notices  and
demands.

                  Unless  otherwise  specified  with  respect to any  Securities
pursuant to Section 302, if and so long as the  Securities of any series (i) are
denominated in a Foreign  Currency or (ii) may be payable in a Foreign  Currency
or so long as it is required under any other provision of this  Indenture,  then
the Company will maintain with respect to each such series of Securities,  or as
so required, at least one exchange rate agent.

                  SECTION  1003.  Money for  Securities  Payments  to Be Held in
Trust. If the Company shall at any time act as its own Paying Agent with respect
to any series of any  Securities and any related  coupons,  it will, by no later
than 11:00 am (Boston  time) on each due date of the  principal of (and premium,
if any),  or  interest  on or  Additional  Amounts  in  respect  of,  any of the
Securities  of that series,  segregate  and hold in trust for the benefit of the
Persons entitled  thereto a sum in the currency or currencies,  currency unit or
units or composite currency or currencies in which the Securities of such series
are  payable  (except as  otherwise  specified  pursuant  to Section 301 for the
Securities of such series) sufficient to pay the principal (and premium, if any)
or interest or Additional  Amounts so becoming due until such sums shall be paid
to such Persons or otherwise  disposed of as herein provided,  and will promptly
notify the Trustee of its action or failure so to act.

                  Whenever the Company  shall have one or more Paying Agents for
any series of Securities and any related coupons, it will, on or before each due
date of the  principal of (and  premium,  if any),  or interest on or Additional
Amounts in respect of, any  Securities  of that  series,  deposit  with a Paying
Agent a sum (in the currency or currencies,  currency unit or units or composite
currency or currencies described in the preceding  paragraph)  sufficient to pay
the  principal  (and  premium,  if any) or interest or  Additional  Amounts,  so
becoming  due,  such  sum to be held in trust  for the  benefit  of the  Persons
entitled  to such  principal,  premium or  interest  or  Additional  Amounts and
(unless such Paying Agent is the Trustee) the Company will  promptly  notify the
Trustee of its action or failure so to act.

                  The  Company  will  cause  each  Paying  Agent  other than the
Trustee to execute and deliver to the Trustee an instrument in which such Paying
Agent shall agree with the Trustee,  subject to the  provisions of this Section,
that such Paying Agent will

                           (1)  hold  all  sums  held by it for the  payment  of
         principal of (and  premium,  if any) or interest on Securities in trust
         for the benefit of the Persons  entitled  thereto until such sums shall
         be paid to such Persons or otherwise disposed of as herein provided;

                           (2) give the  Trustee  notice of any  default  by the
         Company (or any other obligor upon the Securities) in the making of any
         such payment of principal (and premium, if any) or interest; and

                           (3) at any time  during the  continuance  of any such
         default, upon the written request of the Trustee,  forthwith pay to the
         Trustee all sums so held in trust by such Paying Agent.

                  The Company may at any time,  for the purpose of obtaining the
satisfaction  and discharge of this Indenture or for any other purpose,  pay, or
by Company Order direct any Paying Agent to pay, to the Trustee all sums held in
trust by the Company or such Paying  Agent,  such sums to be held by the Trustee
upon the same  trusts as those upon which such sums were held by the  Company or
such Paying  Agent;  and,  upon such payment by any Paying Agent to the Trustee,
such Paying Agent shall be released from all further  liability  with respect to
such sums.

                                       44
<PAGE>

                  Except as otherwise  provided in the Securities of any series,
any money  deposited  with the Trustee or any Paying Agent,  or then held by the
Company,  in trust for the payment of the principal of (and premium,  if any) or
interest on, or any Additional Amounts in respect of, any Security of any series
and remaining  unclaimed  for two years after such  principal  (and premium,  if
any), interest or Additional Amounts has become due and payable shall be paid to
the  Company  upon  Company  Request or (if then held by the  Company)  shall be
discharged from such trust; and the Holder of such Security shall thereafter, as
an  unsecured  general  creditor,  look only to the  Company for payment of such
principal of (and premium,  if any) or interest on, or any Additional Amounts in
respect of, such Security,  without interest  thereon,  and all liability of the
Trustee or such Paying Agent with respect to such trust money, and all liability
of the Company as trustee  thereof,  shall thereupon cease;  provided,  however,
that the Trustee or such Paying  Agent,  before being  required to make any such
repayment,  may at the expense of the Company cause to be published  once, in an
Authorized Newspaper, notice that such money remains unclaimed and that, after a
date  specified  therein,  which shall not be less than 30 days from the date of
such  publication,  any unclaimed  balance of such money then  remaining will be
repaid to the Company.

                  SECTION 1004. Existence. Subject to Article Eight, the Company
will do or cause to be done all things  necessary  to preserve  and keep in full
force  and  effect  its  existence,   rights  (declaration  and  statutory)  and
franchises;  provided,  however,  that the  Company  shall  not be  required  to
preserve  any  right  or  franchise  if  the  Board  shall  determine  that  the
preservation  thereof is no longer  desirable  in the conduct of the business of
the Company.

                  SECTION 1005. Provision of Financial  Information.  Whether or
not the Company is subject to Section 13 or 15(d) of the Securities Exchange Act
of 1934,  as  amended,  the  Company  will,  to the extent  permitted  under the
Securities Exchange Act of 1934, as amended, file with the Commission the annual
reports, quarterly reports and other documents which the Company would have been
required to file with the  Commission  pursuant to such Section 13 or 15(d) (the
"Financial  Statements")  if the Company were so subject,  such  documents to be
filed with the  Commission on or prior to the  respective  dates (the  "Required
Filing  Dates") by which the  Company  would have been  required so to file such
documents if the Company were so subject.

                  The Company  will also in any event (x) within 15 days of each
Required  Filing Date (i)  transmit by mail to all  Holders,  as their names and
addresses appear in the Security  Register,  without cost to such Holders copies
of the annual  reports and  quarterly  reports which the Company would have been
required  to file with the  Commission  pursuant  to  Section 13 or 15(d) of the
Securities Exchange Act of 1934, as amended, if the Company were subject to such
Sections, and (ii) file with the Trustee copies of the annual reports, quarterly
reports and other  documents  which the Company would have been required to file
with the Commission  pursuant to Section 13 or 15(d) of the Securities  Exchange
Act of 1934, as amended, if the Company were subject to such Sections and (y) if
filing such documents by the Company with the Commission is not permitted  under
the Securities  Exchange Act of 1934, as amended,  promptly upon written request
and payment of the reasonable cost of duplication and delivery, supply copies of
such documents to any prospective Holder.

                  SECTION  1006.  Statement as to  Compliance.  The Company will
deliver to the  Trustee,  within 120 days after the end of each fiscal  year,  a
brief  certificate from the principal  executive  officer,  principal  financial
officer  or  principal  accounting  officer  as to his or her  knowledge  of the
Company's compliance with all conditions and covenants under this Indenture and,
in the event of any noncompliance,  specifying such noncompliance and the nature
and status thereof.  For purposes of this Section 1006, such compliance shall be
determined  without regard to any period of grace or requirement of notice under
this Indenture.

                  SECTION  1007.  Additional  Amounts.  If any  Securities  of a
series  provide for the payment of Additional  Amounts,  the Company will pay to
the Holder of any  Security  of such series or any coupon  appertaining  thereto
Additional  Amounts as may be specified as contemplated by Section 301. Whenever
in this  Indenture  there is  mentioned,  in any  context  except in the case of
Section  502(1),  the payment of the principal of or any premium or interest on,
or in respect of, any Security of any series or payment of any related coupon or
the net proceeds received on the sale or exchange of any Security of any series,
such  mention  shall be deemed to include  mention of the payment of  Additional
Amounts provided by the terms of such series established pursuant to Section 301
to

                                       45
<PAGE>

the extent that,  in such  context,  Additional  Amounts  are,  were or would be
payable in respect  thereof  pursuant to such terms and  express  mention of the
payment of Additional Amounts (if applicable) in any provisions hereof shall not
be construed as excluding  Additional  Amounts in those provisions  hereof where
such express mention is not made.

                  Except as otherwise  specified as contemplated by Section 301,
if the Securities of a series provide for the payment of Additional  Amounts, at
least 20 days  prior to the first  Interest  Payment  Date with  respect to that
series of Securities (or if the Securities of that series will not bear interest
prior to Maturity, the first day on which a payment of principal and any premium
is made),  and at least 10 days prior to each date of payment of  principal  and
any premium or interest if there has been any change with respect to the matters
set forth in the below-mentioned Officers' Certificate, the Company will furnish
the Trustee and the Company's  principal Paying Agent or Paying Agents, if other
than the Trustee, with an Officers' Certificate instructing the Trustee and such
Paying  Agent or Paying  Agents  whether  such  payment of  principal of and any
premium or interest on the Securities of that series shall be made to Holders of
Securities  of that  series or any  related  coupons  who are not United  States
persons without  withholding  for or on account of any tax,  assessment or other
governmental  charge  described  in the  Securities  of the series.  If any such
withholding shall be required,  then such Officers' Certificate shall specify by
country the  amount,  if any,  required to be withheld on such  payments to such
Holders of Securities of that series or related coupons and the Company will pay
to the Trustee or such Paying Agent the Additional Amounts required by the terms
of such  Securities.  In the event that the Trustee or any Paying Agent,  as the
case may be,  shall not so receive  the  above-mentioned  certificate,  then the
Trustee  or such  Paying  Agent  shall be  entitled  (i) to assume  that no such
withholding or deduction is required with respect to any payment of principal or
interest with respect to any Securities of a series or related  coupons until it
shall  have  received  a  certificate  advising  otherwise  and (ii) to make all
payments of principal and interest with respect to the Securities of a series or
related coupons without  withholding or deductions until otherwise advised.  The
Company covenants to indemnify the Trustee and any Paying Agent for, and to hold
them  harmless  against,  any loss,  liability  or expense  reasonably  incurred
without  negligence  or bad faith on their part arising out of or in  connection
with  actions  taken or omitted by any of them or in reliance  on any  Officers'
Certificate  furnished  pursuant to this Section or in reliance on the Company's
not furnishing such an Officers' Certificate.

                  SECTION  1008.  Waiver of Certain  Covenants.  The Company may
omit in any particular instance to comply with any term,  provision or condition
set  forth  in  Sections  1004 or 1005,  if  before  or after  the time for such
compliance  the  Holders  of at least a  majority  in  principal  amount  of all
outstanding Securities of such series, by Act of such Holders, either waive such
compliance in such instance or generally waive  compliance with such covenant or
condition,  but no such  waiver  shall  extend to or  affect  such  covenant  or
condition except to the extent so expressly waived, and, until such waiver shall
become  effective,  the obligations of the Company and the duties of the Trustee
in respect of any such term,  provision or condition  shall remain in full force
and effect.

                                 ARTICLE ELEVEN

                            REDEMPTION OF SECURITIES

                  SECTION  1101.  Applicability  of Article.  Securities  of any
series which are redeemable  before their Stated Maturity shall be redeemable in
accordance  with their terms and (except as otherwise  specified as contemplated
by Section 301 for Securities of any series) in accordance with this Article.

                  SECTION  1102.  Election  to Redeem;  Notice to  Trustee.  The
election  of the  Company  to redeem any  Securities  shall be  evidenced  by or
pursuant to a Board Resolution. In case of any redemption at the election of the
Company of less than all of the Securities of any series,  the Company shall, at
least 45 days prior to the giving of the notice of  redemption  in Section  1104
(unless a shorter  notice  shall be  satisfactory  to the  Trustee),  notify the
Trustee of such  Redemption  Date and of the  principal  amount of Securities of
such series to be redeemed. In the case of any redemption of Securities prior to
the expiration of any restriction on such redemption provided in the

                                       46
<PAGE>

terms of such  Securities  or elsewhere  in this  Indenture,  the Company  shall
furnish the Trustee with an Officers'  Certificate  evidencing  compliance  with
such restriction.

                  SECTION  1103.  Selection  by  Trustee  of  Securities  to  Be
Redeemed.  If less than all the  Securities of any series issued on the same day
with the same terms are to be redeemed, the particular Securities to be redeemed
shall be  selected  not more than 60 days  prior to the  Redemption  Date by the
Trustee, from the Outstanding Securities of such series issued on such date with
the same terms not  previously  called  for  redemption,  by such  method as the
Trustee shall deem fair and  appropriate and which may provide for the selection
for redemption of portions  (equal to the minimum  authorized  denomination  for
Securities  of that series or any integral  multiple  thereof) of the  principal
amount of  Securities of such series of a  denomination  larger than the minimum
authorized denomination for Securities of that series.

                  The Trustee shall promptly notify the Company and the Security
Registrar  (if other than  itself) in writing  of the  Securities  selected  for
redemption and, in the case of any Securities  selected for partial  redemption,
the principal amount thereof to be redeemed.

                  For  all  purposes  of  this  Indenture,  unless  the  context
otherwise  requires,  all  provisions  relating to the  redemption of Securities
shall  relate,  in the case of any Security  redeemed or to be redeemed  only in
part, to the portion of the principal  amount of such Security which has been or
is to be redeemed.

                  SECTION 1104. Notice of Redemption. Notice of redemption shall
be given in the manner  provided in Section 106 and as may be further  specified
in an indenture supplemental hereto, not less than 30 days nor more than 60 days
prior to the Redemption Date,  unless a shorter period is specified by the terms
of such series established pursuant to Section 301, to each Holder of Securities
to be redeemed, but failure to give such notice in the manner herein provided to
the Holder of any Security  designated  for redemption as a whole or in part, or
any defect in the notice to any such  Holder,  shall not affect the  validity of
the  proceedings  for the  redemption  of any other  such  Security  or  portion
thereof.

                  Any  notice  that  is  mailed  to the  Holders  of  Registered
Securities in the manner herein provided shall be conclusively  presumed to have
been duly given, whether or not such Holders receive such notice.

                  All notices of redemption shall state:

                  (1) the Redemption Date,

                  (2) the Redemption  Price,  accrued interest to the Redemption
         Date  payable as  provided  in Section  1106,  if any,  and  Additional
         Amounts, if any,

                  (3) if less than all Outstanding  Securities of any series are
         to be  redeemed,  the  identification  (and,  in the  case  of  partial
         redemption,  the  principal  amount)  of  the  particular  Security  or
         Securities to be redeemed,

                  (4) in case any  Security is to be redeemed in part only,  the
         notice which relates to such Security shall state that on and after the
         Redemption  Date,  upon  surrender  of such  Security,  the holder will
         receive,  without  charge,  a new Security or  Securities of authorized
         denominations for the principal amount thereof remaining unredeemed,

                  (5) that on the  Redemption  Date  the  Redemption  Price  and
         accrued  interest to the Redemption Date payable as provided in Section
         1106, if any, will become due and payable upon each such  Security,  or
         the portion thereof,  to be redeemed and, if applicable,  that interest
         thereon shall cease to accrue on and after said date,

                                       47
<PAGE>

                  (6) the Place or  Places of  Payment  where  such  Securities,
         together in the case of Bearer Securities with all coupons appertaining
         thereto,  if  any,  maturing  after  the  Redemption  Date,  are  to be
         surrendered for payment of the Redemption  Price and accrued  interest,
         if any, or for conversion,

                  (7) that the  redemption is for a sinking fund, if such is the
         case,

                  (8) that unless  otherwise  specified in such  notice,  Bearer
         Securities of any series,  if any,  surrendered  for redemption must be
         accompanied by all coupons  maturing  subsequent to the Redemption Date
         or the amount of any such  missing  coupon or coupons  will be deducted
         from the Redemption Price, unless security or indemnity satisfactory to
         the  Company,  the  Trustee  for such  series and any  Paying  Agent is
         furnished,

                  (9) if Bearer  Securities of any series are to be redeemed and
         any Registered Securities of such series are not to be redeemed, and if
         such Bearer  Securities may be exchanged for Registered  Securities not
         subject to redemption on this  Redemption  Date pursuant to Section 305
         or otherwise,  the last date,  as  determined by the Company,  on which
         such exchanges may be made,

                  (10) the CUSIP number of such Security, if any, and

                  (11) if applicable, that a Holder of Securities who desires to
         convert  Securities for redemption  must satisfy the  requirements  for
         conversion  contained in such Securities,  the then existing conversion
         price or rate,  and the date and time when the option to convert  shall
         expire.

                  Notice of redemption  of  Securities  to be redeemed  shall be
given by the Company or, at the  Company's  request,  by the Trustee in the name
and at the expense of the Company.

                  SECTION  1105.  Deposit of  Redemption  Price.  On or prior to
11:00 am (Boston time) on any  Redemption  Date,  the Company shall deposit with
the  Trustee  or with a Paying  Agent (or,  if the  Company is acting as its own
Paying  Agent,  which it may not do in the case of a sinking fund payment  under
Article  Twelve,  segregate  and hold in trust as provided  in Section  1003) an
amount  of  money  in the  currency  or  currencies,  currency  unit or units or
composite  currency or  currencies  in which the  Securities  of such series are
payable  (except  as  otherwise  specified  pursuant  to  Section  301  for  the
Securities  of  such  series)  sufficient  to  pay on the  Redemption  Date  the
Redemption  Price of, and  (except if the  Redemption  Date shall be an Interest
Payment Date) accrued  interest on, all the Securities or portions thereof which
are to be redeemed on that date.

                  SECTION 1106. Securities Payable on Redemption Date. Notice of
redemption  having been given as  aforesaid,  the  Securities  so to be redeemed
shall, on the Redemption  Date,  become due and payable at the Redemption  Price
therein  specified  in the  currency or  currencies,  currency  unit or units or
composite  currency or  currencies  in which the  Securities  of such series are
payable  (except  as  otherwise  specified  pursuant  to  Section  301  for  the
Securities  of such  series)  (together  with accrued  interest,  if any, to the
Redemption Date), and from and after such date (unless the Company shall default
in the payment of the Redemption  Price and accrued  interest)  such  Securities
shall, if the same were interest-bearing, cease to bear interest and the coupons
for such  interest  appertaining  to any Bearer  Securities  so to be  redeemed,
except to the extent provided  below,  shall be void. Upon surrender of any such
Security  for  redemption  in  accordance  with said notice,  together  with all
coupons, if any,  appertaining  thereto maturing after the Redemption Date, such
Security  shall be paid by the Company at the  Redemption  Price,  together with
accrued  interest,  if any, to the  Redemption  Date;  provided,  however,  that
installments  of interest on Bearer  Securities  whose Stated  Maturity is on or
prior to the  Redemption  Date  shall be  payable  only at an  office  or agency
located outside the United States (except as otherwise provided in Section 1002)
and,  unless  otherwise  specified as  contemplated  by Section  301,  only upon
presentation  and surrender of coupons for such interest;  and provided  further
that, except as otherwise  provided with respect to Securities  convertible into
Common Shares or Preferred  Shares of the Company,  installments  of interest on
Registered  Securities  whose Stated  Maturity is on or prior to the  Redemption
Date  shall  be  payable  to the  Holders  of  such  Securities,  or one or more
Predecessor

                                       48
<PAGE>

Securities,  registered as such at the close of business on the relevant  Record
Dates according to their terms and the provisions of Section 307.

                  If any Bearer Security surrendered for redemption shall not be
accompanied by all appurtenant  coupons maturing after the Redemption Date, such
Security may be paid after  deducting from the Redemption  Price an amount equal
to the face amount of all such missing coupons, or the surrender of such missing
coupon or  coupons  may be waived by the  Company  and the  Trustee  if there be
furnished to them such security or indemnity as they may require to save each of
them and any Paying Agent  harmless.  If thereafter  the Holder of such Security
shall  surrender to the Trustee or any Paying  Agent any such missing  coupon in
respect of which a  deduction  shall have been made from the  Redemption  Price,
such  Holder  shall be entitled  to receive  the amount so  deducted;  provided,
however, that interest represented by coupons shall be payable only at an office
or agency  located  outside the United States  (except as otherwise  provided in
Section 1002) and,  unless  otherwise  specified as contemplated by Section 301,
only upon presentation and surrender of those coupons.

                   If any Security  called for  redemption  shall not be so paid
upon  surrender  thereof for  redemption,  the principal  (and premium,  if any)
shall,  until paid,  bear interest from the Redemption Date at the rate borne by
the Security.

                  SECTION  1107.  Securities  Redeemed in Part.  Any  Registered
Security  which is to be redeemed  only in part  (pursuant to the  provisions of
this Article or of Article  Twelve) shall be  surrendered  at a Place of Payment
therefor (with,  if the Company or the Trustee so requires,  due endorsement by,
or a written  instrument of transfer in form satisfactory to the Company and the
Trustee duly executed by, the Holder thereof or his attorney duly  authorized in
writing) and the Company shall execute and the Trustee  shall  authenticate  and
deliver to the Holder of such Security  without service charge a new Security or
Securities of the same series,  of any authorized  denomination  as requested by
such Holder in  aggregate  principal  amount  equal to and in  exchange  for the
unredeemed portion of the principal of the Security so surrendered.

                                 ARTICLE TWELVE

                                  SINKING FUNDS

                  SECTION 1201. Applicability of Article. The provisions of this
Article shall be applicable to any sinking fund for the retirement of Securities
of a series  except as otherwise  specified as  contemplated  by Section 301 for
Securities of such series.

                  The minimum amount of any sinking fund payment provided for by
the terms of  Securities  of any series is herein  referred  to as a  "mandatory
sinking fund payment", and any payment in excess of such minimum amount provided
for by the terms of such  Securities  of any series is herein  referred to as an
"optional sinking fund payment".  If provided for by the terms of any Securities
of any series,  the cash amount of any  mandatory  sinking  fund  payment may be
subject to  reduction  as provided in Section  1202.  Each  sinking fund payment
shall be applied to the  redemption  of Securities of any series as provided for
by the terms of Securities of such series.

                  SECTION  1202.  Satisfaction  of Sinking  Fund  Payments  with
Securities. The Company may, in satisfaction of all or any part of any mandatory
sinking fund payment with  respect to the  Securities  of a series,  (1) deliver
Outstanding  Securities  of such series  (other than any  previously  called for
redemption)  together in the case of any Bearer  Securities  of such series with
all unmatured coupons  appertaining thereto and (2) apply as a credit Securities
of such series  which have been  redeemed  either at the election of the Company
pursuant to the terms of such Securities or through the application of permitted
optional  sinking fund  payments  pursuant to the terms of such  Securities,  as
provided  for by the terms of such  Securities,  or which  have  otherwise  been
acquired by the Company;  provided that such  Securities so delivered or applied
as a credit have not been  previously  so  credited.  Such  Securities  shall be
received  and  credited  for  such  purpose  by the  Trustee  at the  applicable
Redemption Price specified in such

                                       49
<PAGE>

Securities for redemption  through  operation of the sinking fund and the amount
of such mandatory sinking fund payment shall be reduced accordingly.

                  SECTION 1203.  Redemption of Securities  for Sinking Fund. Not
less than 60 days prior to each sinking fund payment date for  Securities of any
series,  the  Company  will  deliver  to the  Trustee an  Officers'  Certificate
specifying  the amount of the next  ensuing  mandatory  sinking fund payment for
that series pursuant to the terms of that series,  the portion thereof,  if any,
which is to be  satisfied  by payment  of cash in the  currency  or  currencies,
currency  unit or  units or  composite  currency  or  currencies  in  which  the
Securities of such series are payable (except as otherwise specified pursuant to
Section 301 for the Securities of such series) and the portion thereof,  if any,
which is to be satisfied by delivering  and crediting  Securities of that series
pursuant to Section 1202, and the optional  amount,  if any, to be added in cash
to the next ensuing mandatory sinking fund payment, and will also deliver to the
Trustee any  Securities  to be so  delivered  and  credited.  If such  Officers'
Certificate  shall  specify an  optional  amount to be added in cash to the next
ensuing mandatory sinking fund payment, the Company shall thereupon be obligated
to pay the amount  therein  specified.  Not less than 30 days  before  each such
sinking fund payment date the Trustee shall select the Securities to be redeemed
upon such sinking fund payment date in the manner  specified in Section 1103 and
cause  notice of the  redemption  thereof  to be given in the name of and at the
expense of the  Company in the manner  provided  in Section  1104.  Such  notice
having been duly given, the redemption of such Securities shall be made upon the
terms and in the manner stated in Sections 1106 and 1107.

                                ARTICLE THIRTEEN

                       REPAYMENT AT THE OPTION OF HOLDERS

                  SECTION   1301.   Applicability   of  Article.   Repayment  of
Securities of any series  before their Stated  Maturity at the option of Holders
thereof shall be made in accordance with the terms of such  Securities,  if any,
and  (except as  otherwise  specified  by the terms of such  series  established
pursuant to Section 301) in accordance with this Article.

                  SECTION  1302.  Repayment  of  Securities.  Securities  of any
series  subject to  repayment  in whole or in part at the option of the  Holders
thereof will,  unless  otherwise  provided in the terms of such  Securities,  be
repaid at a price equal to the principal amount thereof, together with interest,
if any,  thereon  accrued to the Repayment  Date specified in or pursuant to the
terms of such Securities.  The Company covenants that on or before the Repayment
Date it will deposit with the Trustee or with a Paying Agent (or, if the Company
is acting as its own Paying  Agent,  segregate  and hold in trust as provided in
Section 1003) an amount of money in the currency or currencies, currency unit or
units or composite currency or currencies in which the Securities of such series
are  payable  (except as  otherwise  specified  pursuant  to Section 301 for the
Securities of such series)  sufficient to pay the principal  (or, if so provided
by the terms of the Securities of any series, a percentage of the principal) of,
and (except if the  Repayment  Date shall be an Interest  Payment  Date) accrued
interest on, all the Securities or portions  thereof,  as the case may be, to be
repaid on such date.

                  SECTION  1303.  Exercise of Option.  Securities  of any series
subject  to  repayment  at the option of the  Holders  thereof  will  contain an
"Option to Elect Repayment" form on the reverse of such Securities. In order for
any Security to be repaid at the option of the Holder,  the Trustee must receive
at the Place of Payment therefor  specified in the terms of such Security (or at
such other place or places of which the  Company  shall from time to time notify
the Holders of such  Securities) not earlier than 60 days nor later than 30 days
prior to the  Repayment  Date (1) the Security so providing  for such  repayment
together with the "Option to Elect  Repayment"  form on the reverse thereof duly
completed by the Holder or by the Holder's  attorney duly  authorized in writing
or (2) a telegram,  telex, facsimile transmission or a letter from a member of a
national securities exchange, or the National Association of Securities Dealers,
Inc.  ("NASD"),  or a  commercial  bank or trust  company in the  United  States
setting  forth the name of the Holder of the Security,  the principal  amount of
the  Security,  the  principal  amount of the  Security to be repaid,  the CUSIP
number,  if any,  or a  description  of the tenor and terms of the  Security,  a
statement that the option to elect  repayment is being  exercised  thereby and a
guarantee that the Security to be repaid, together

                                       50
<PAGE>

with the duly completed form entitled "Option to Elect Repayment" on the reverse
of the  Security,  will be  received  by the  Trustee  not later  than the fifth
Business Day after the date of such telegram,  telex,  facsimile transmission or
letter; provided,  however, that such telegram, telex, facsimile transmission or
letter  shall only be effective if such  Security  and form duly  completed  are
received  by the  Trustee by such fifth  Business  Day.  If less than the entire
principal  amount of such Security is to be repaid in accordance  with the terms
of such  Security,  the  principal  amount of such  Security  to be  repaid,  in
increments of the minimum  denomination  for Securities of such series,  and the
denomination or  denominations of the Security or Securities to be issued to the
Holder for the portion of the principal amount of such Security surrendered that
is not to be repaid,  must be specified.  The  principal  amount of any security
providing for repayment at the option of the Holder thereof may not be repaid in
part if, following such repayment,  the unpaid principal amount of such Security
would be less than the minimum  authorized  denomination  of  Securities  of the
series of which such Security to be repaid is a part. Except as otherwise may be
provided by the terms of any Security  providing  for repayment at the option of
the Holder  thereof,  exercise of the  repayment  option by the Holder  shall be
irrevocable unless waived by the Company.

                  SECTION 1304. When Securities  Presented for Repayment  Become
Due and Payable.  If  Securities  of any series  providing  for repayment at the
option of the Holders  thereof shall have been  surrendered  as provided in this
Article and as provided  by or  pursuant to the terms of such  Securities,  such
Securities  or the  portions  thereof,  as the case may be, to be  repaid  shall
become due and payable and shall be paid by the  Company on the  Repayment  Date
therein  specified,  and on and after such  Repayment  Date  (unless the Company
shall  default in the payment of such  Securities on such  Repayment  Date) such
Securities shall, if the same were interest-bearing,  cease to bear interest and
the coupons for such  interest  appertaining  to any Bearer  Securities so to be
repaid,  except to the extent provided  below,  shall be void. Upon surrender of
any such  Security for repayment in accordance  with such  provisions,  together
with all coupons,  if any,  appertaining  thereto  maturing  after the Repayment
Date, the principal amount of such Security so to be repaid shall be paid by the
Company,  together  with  accrued  interest,  if  any,  to the  Repayment  Date;
provided,  however,  that coupons  whose  Stated  Maturity is on or prior to the
Repayment Date shall be payable only at an office or agency located  outside the
United  States  (except  as  otherwise  provided  in Section  1002) and,  unless
otherwise  specified  pursuant  to  Section  301,  only  upon  presentation  and
surrender of such coupons;  and provided further that, in the case of Registered
Securities,  installments  of interest,  if any, whose Stated  Maturity is on or
prior to the  Repayment  Date shall be payable  (but without  interest  thereon,
unless the Company shall default in the payment  thereof) to the Holders of such
Securities,  or one or more  Predecessor  Securities,  registered as such at the
close of business on the relevant  Record Dates according to their terms and the
provisions of Section 307.

                  If any Bearer Security  surrendered for repayment shall not be
accompanied by all appurtenant  coupons  maturing after the Repayment Date, such
Security  may be paid  after  deducting  from the  amount  payable  therefor  as
provided in Section  1302 an amount equal to the face amount of all such missing
coupons, or the surrender of such missing coupon or coupons may be waived by the
Company and the Trustee if there be furnished to them such security or indemnity
as they may  require  to save each of them and any  Paying  Agent  harmless.  If
thereafter  the Holder of such  Security  shall  surrender to the Trustee or any
Paying Agent any such missing coupon in respect of which a deduction  shall have
been made as provided in the preceding  sentence,  such Holder shall be entitled
to receive the amount so deducted;  provided, however, that interest represented
by coupons  shall be payable  only at an office or agency  located  outside  the
United  States  (except  as  otherwise  provided  in Section  1002) and,  unless
otherwise  specified as contemplated by Section 301, only upon  presentation and
surrender of those coupons.

                  If the  principal  amount  of  any  Security  surrendered  for
repayment shall not be so repaid upon surrender  thereof,  such principal amount
(together with interest,  if any, thereon accrued to such Repayment Date) shall,
until paid,  bear interest  from the  Repayment  Date at the rate of interest or
Yield to Maturity (in the case of Original Issue Discount  Securities) set forth
in such Security.

                  SECTION 1305. Securities Repaid in Part. Upon surrender of any
Registered  Security  which is to be  repaid in part  only,  the  Company  shall
execute and the  Trustee  shall  authenticate  and deliver to the Holder of such
Security,  without  service  charge  and at the  expense of the  Company,  a new
Registered Security or Securities

                                       51
<PAGE>


of the same series, of any authorized  denomination  specified by the Holder, in
an  aggregate  principal  amount equal to and in exchange for the portion of the
principal of such Security so surrendered which is not to be repaid.


                                ARTICLE FOURTEEN

                       DEFEASANCE AND COVENANT DEFEASANCE

                  SECTION 1401.  Applicability  of Article;  Company's Option to
Effect Defeasance or Covenant Defeasance. If, pursuant to Section 301, provision
is made for either or both of (a)  defeasance  of the  Securities of or within a
series under  Section 1402 or (b) covenant  defeasance  of the  Securities of or
within a series  under  Section  1403,  then the  provisions  of such Section or
Sections, as the case may be, together with the other provisions of this Article
(with such  modifications  thereto as may be  specified  pursuant to Section 301
with respect to any Securities),  shall be applicable to such Securities and any
coupons  appertaining  thereto,  and the  Company  may at its  option  by  Board
Resolution,  at any  time,  with  respect  to such  Securities  and any  coupons
appertaining thereto, elect to have Section 1402 (if applicable) or Section 1403
(if  applicable)  be  applied to such  Outstanding  Securities  and any  coupons
appertaining thereto upon compliance with the conditions set forth below in this
Article.

                  SECTION 1402.  Defeasance  and  Discharge.  Upon the Company's
exercise of the above  option  applicable  to this  Section  with respect to any
Securities  of or  within a  series,  the  Company  shall be deemed to have been
discharged from its obligations with respect to such Outstanding  Securities and
any coupons appertaining thereto on the date the conditions set forth in Section
1404  are  satisfied  (hereinafter,   "defeasance").   For  this  purpose,  such
defeasance  means that the Company  shall be deemed to have paid and  discharged
the entire  indebtedness  represented  by such  Outstanding  Securities  and any
coupons   appertaining   thereto,   which  shall  thereafter  be  deemed  to  be
"Outstanding"  only for the purposes of Section  1405 and the other  Sections of
this Indenture  referred to in clauses (A) and (B) below,  and to have satisfied
all of its other obligations under such Securities and any coupons  appertaining
thereto  and  this  Indenture   insofar  as  such  Securities  and  any  coupons
appertaining  thereto  are  concerned  (and the  Trustee,  at the expense of the
Company,  shall execute proper instruments  acknowledging the same),  except for
the  following  which shall  survive  until  otherwise  terminated or discharged
hereunder:  (A) the  rights of Holders of such  Outstanding  Securities  and any
coupons appertaining thereto to receive, solely from the trust fund described in
Section 1404 and as more fully set forth in such Section, payments in respect of
the principal of (and premium, if any) and interest,  if any, on such Securities
and any  coupons  appertaining  thereto  when  such  payments  are due,  (B) the
Company's  obligations  with respect to such Securities under Sections 305, 306,
1002 and 1003 and with respect to the payment of Additional  Amounts, if any, on
such Securities as contemplated by Section 1007, (C) the rights, powers, trusts,
duties and  immunities of the Trustee  hereunder and (D) this Article  Fourteen.
Subject to compliance with this Article  Fourteen,  the Company may exercise its
option under this Section notwithstanding the prior exercise of its option under
Section  1403 with  respect  to such  Securities  and any  coupons  appertaining
thereto.

                  SECTION 1403. Covenant Defeasance. Upon the Company's exercise
of the above option applicable to this Section with respect to any Securities of
or within a series,  the Company  shall be released from its  obligations  under
Sections  1004  and  1005  and,  if  specified  pursuant  to  Section  301,  its
obligations  under  any  other  covenant,   with  respect  to  such  Outstanding
Securities  and any  coupons  appertaining  thereto  on and  after  the date the
conditions  set forth in  Section  1404 are  satisfied  (hereinafter,  "covenant
defeasance"),  and such  Securities and any coupons  appertaining  thereto shall
thereafter be deemed to be not  "Outstanding" for the purposes of any direction,
waiver,  consent or declaration or Act of Holders (and the  consequences  of any
thereof) in connection with Sections 1004 and 1005 or such other  covenant,  but
shall continue to be deemed "Outstanding" for all other purposes hereunder.  For
this  purpose,  such  covenant  defeasance  means  that,  with  respect  to such
Outstanding  Securities and any coupons  appertaining  thereto,  the Company may
omit to  comply  with and  shall  have no  liability  in  respect  of any  term,
condition or  limitation  set forth in any such Section or such other  covenant,
whether directly or indirectly,  by reason of any reference  elsewhere herein to
any such  Section or such other  covenant or by reason of  reference in any such
Section or such other  covenant  to any other  provision  herein or in any other
document and such omission to comply shall not  constitute a default or an Event
of Default under Section 501(4) or 501(9) or otherwise, as the

                                       52
<PAGE>

case may be, but except as specified  above, the remainder of this Indenture and
such  Securities  and any  coupons  appertaining  thereto  shall  be  unaffected
thereby.

                  SECTION 1404. Conditions to Defeasance or Covenant Defeasance.
The following  shall be the conditions to application of Section 1402 or Section
1403 to any  Outstanding  Securities  of or  within  a  series  and any  coupons
appertaining thereto:

                           (a) The Company shall  irrevocably  have deposited or
         caused to be deposited with the Trustee (or another trustee  satisfying
         the  requirements  of Section  607 who shall  agree to comply  with the
         provisions of this Article Fourteen applicable to it) as trust funds in
         trust for the purpose of making the  following  payments,  specifically
         pledged as security  for, and  dedicated  solely to, the benefit of the
         Holders of such Securities and any coupons appertaining thereto, (1) an
         amount in such  currency,  currencies  or  currency  unit in which such
         Securities and any coupons  appertaining  thereto are then specified as
         payable at Stated  Maturity)  which  through the  scheduled  payment of
         principal  and  interest in respect  thereof in  accordance  with their
         terms will  provide,  not later than one day before the due date of any
         payment of principal of (and premium, if any) and interest,  if any, on
         such Securities and any coupons appertaining thereto, or (2) Government
         Obligations  applicable  to such  Securities  and coupons  appertaining
         thereto  (determined  on the  basis  of  the  currency,  currencies  or
         currency unit in which such Securities and coupons appertaining thereto
         are then  specified as payable at Stated  Maturity)  which  through the
         scheduled  payment of  principal  and  interest  in respect  thereof in
         accordance with their terms will provide, not later than one day before
         the due date of any payment of principal of (and  premium,  if any) and
         interest,  if any,  on such  Securities  and any  coupons  appertaining
         thereto, money in an amount, or (3) a combination thereof in an amount,
         sufficient,   in  the  opinion  of  a  nationally  recognized  firm  of
         independent  public  accountants  expressed in a written  certification
         thereof delivered to the Trustee, to pay and discharge, and which shall
         be applied by the  Trustee  (or other  qualifying  trustee)  to pay and
         discharge,  (i) the principal of (and premium, if any) and interest, if
         any,  on  such  Outstanding  Securities  and any  coupons  appertaining
         thereto on the Stated  Maturity of such  principal  or  installment  of
         principal or interest and (ii) any  mandatory  sinking fund payments or
         analogous  payments  applicable to such Outstanding  Securities and any
         coupons  appertaining thereto on the day on which such payments are due
         and payable in accordance  with the terms of this Indenture and of such
         Securities and any coupons appertaining thereto.

                           (b) Such defeasance or covenant  defeasance shall not
         result in a breach or violation of, or constitute a default under, this
         Indenture or any other  material  agreement or  instrument to which the
         Company is a party or by which it is bound.

                           (c) No Event of Default or event which with notice or
         lapse of time or both would  become an Event of Default with respect to
         such  Securities  and  any  coupons  appertaining  thereto  shall  have
         occurred and be continuing  on the date of such deposit or,  insofar as
         Sections 501(6) and 501(7) are concerned, at any time during the period
         ending  on the  91st  day  after  the date of such  deposit  (it  being
         understood that this condition shall not be deemed  satisfied until the
         expiration of such period).

                           (d) In the case of an election  under  Section  1402,
         the Company  shall have  delivered to the Trustee an Opinion of Counsel
         stating  that (i) the  Company  has  received  from,  or there has been
         published by, the Internal Revenue Service a ruling,  or (ii) since the
         date of  execution  of this  Indenture,  there has been a change in the
         applicable  Federal  income tax law, in either case to the effect that,
         and based thereon such opinion shall confirm that,  the Holders of such
         Outstanding  Securities and any coupons  appertaining  thereto will not
         recognize  income,  gain or loss for Federal  income tax  purposes as a
         result of such  defeasance and will be subject to Federal income tax on
         the same  amounts,  in the same  manner  and at the same times as would
         have been the case if such defeasance had not occurred.

                           (e) In the case of an election  under  Section  1403,
         the Company  shall have  delivered to the Trustee an Opinion of Counsel
         to the effect that the Holders of such Outstanding Securities and any

                                       53
<PAGE>

         coupons  appertaining  thereto will not recognize income,  gain or loss
         for Federal income tax purposes as a result of such covenant defeasance
         and will be subject to Federal  income tax on the same amounts,  in the
         same  manner  and at the same times as would have been the case if such
         covenant defeasance had not occurred.

                           (f) The Company  shall have  delivered to the Trustee
         an Officers'  Certificate and an Opinion of Counsel,  each stating that
         all conditions  precedent to the  defeasance  under Section 1402 or the
         covenant  defeasance  under Section 1403 (as the case may be) have been
         complied  with and an Opinion of Counsel to the effect  that either (i)
         as a result  of a  deposit  pursuant  to  subsection  (a) above and the
         related  exercise of the Company's option under Section 1402 or Section
         1403 (as the  case may be),  registration  is not  required  under  the
         Investment  Company  Act of 1940,  as  amended,  by the  Company,  with
         respect to the trust funds  representing such deposit or by the Trustee
         for such trust funds or (ii) all necessary registrations under said Act
         have been effected.

                           (g)  Notwithstanding  any  other  provisions  of this
         Section,  such defeasance or covenant  defeasance  shall be effected in
         compliance  with any  additional  or  substitute  terms,  conditions or
         limitations which may be imposed on the Company in connection therewith
         pursuant to Section 301.

                  SECTION 1405. Deposited Money and Government Obligations to Be
Held in Trust; Other Miscellaneous Provisions.  Subject to the provisions of the
last paragraph of Section 1003, all money and Government  Obligations  (or other
property as may be provided  pursuant to Section  301)  (including  the proceeds
thereof) deposited with the Trustee (or other qualifying  trustee,  collectively
for purposes of this Section 1405,  the  "Trustee")  pursuant to Section 1404 in
respect of any Outstanding Securities of any series and any coupons appertaining
thereto shall be held in trust and applied by the Trustee,  in  accordance  with
the provisions of such Securities and any coupons  appertaining thereto and this
Indenture,  to  the  payment,  either  directly  or  through  any  Paying  Agent
(including  the  Company  acting as its own  Paying  Agent) as the  Trustee  may
determine,  to the  Holders  of such  Securities  and any  coupons  appertaining
thereto of all sums due and to become due thereon in respect of  principal  (and
premium,  if any) and interest and  Additional  Amounts,  if any, but such money
need not be segregated from other funds except to the extent required by law.

                  Unless  otherwise  specified  with  respect  to  any  Security
pursuant to Section 301, if, after a deposit  referred to in Section 1404(a) has
been made,  (a) the Holder of a Security  in respect of which such  deposit  was
made is  entitled  to, and does,  elect  pursuant to Section 301 or the terms of
such Security to receive  payment in a currency or currency unit other than that
in which the  deposit  pursuant  to Section  1404(a) has been made in respect of
such  Security,  or (b) a Conversion  Event occurs in respect of the currency or
currency  unit in which the deposit  pursuant to Section  1404(a) has been made,
the  indebtedness  represented  by such  Security  and any coupons  appertaining
thereto  shall  be  deemed  to have  been,  and will be,  fully  discharged  and
satisfied  through the payment of the  principal of (and premium,  if any),  and
interest,  if any, on such  Security as the same becomes due out of the proceeds
yielded by converting  (from time to time as specified  below in the case of any
such  election)  the  amount or other  property  deposited  in  respect  of such
Security  into the  currency or  currency  unit in which such  Security  becomes
payable as a result of such election or Conversion Event based on the applicable
market  exchange rate for such currency or currency unit in effect on the second
Business Day prior to each payment  date,  in the case of such an election,  or,
the applicable market exchange rate in effect for such currency or currency unit
(as nearly as feasible), in the case of such Conversion Event.

                  The Company shall pay and  indemnify  the Trustee  against any
tax,  fee  or  other  charge  imposed  on or  assessed  against  the  Government
Obligations  deposited  pursuant to Section 1404 or the  principal  and interest
received in respect  thereof  other than any such tax, fee or other charge which
by law is for the account of the Holders of such Outstanding  Securities and any
coupons appertaining thereto.

                  Anything in this Article to the contrary notwithstanding,  the
Trustee  shall  deliver  or pay to the  Company  from time to time upon  Company
Request any money or Government Obligations (or other property and

                                       54
<PAGE>

any proceeds  therefrom)  held by it as provided in Section  1404 which,  in the
opinion  of a  nationally  recognized  firm of  independent  public  accountants
expressed in a written  certification  thereof delivered to the Trustee,  are in
excess of the amount  thereof  which would then be required to be  deposited  to
effect a defeasance or covenant  defeasance,  as applicable,  in accordance with
this Article.


                                 ARTICLE FIFTEEN

                        MEETINGS OF HOLDERS OF SECURITIES

                  SECTION  1501.  Purposes for Which  Meetings May Be Called.  A
meeting  of Holders  of  Securities  of any series may be called at any time and
from time to time  pursuant to this  Article to make,  give or take any request,
demand,  authorization,  direction,  notice,  consent,  waiver  or other  action
provided by this  Indenture to be made,  given or taken by Holders of Securities
of such series.

                  SECTION  1502.  Call,  Notice and Place of  Meetings.  (a) The
Trustee  may at any time call a meeting of Holders of  Securities  of any series
for any purpose  specified in Section  1501, to be held at such time and at such
place in the City of Boston, or in London as the Trustee shall determine. Notice
of every meeting of Holders of Securities of any series,  setting forth the time
and the place of such  meeting  and in general  terms the action  proposed to be
taken at such meeting,  shall be given,  in the manner  provided in Section 106,
not less than 21 nor more than 180 days prior to the date fixed for the meeting.

                  (b) In case  at any  time  the  Company,  pursuant  to a Board
Resolution,  or  the  Holders  of at  least  25%  in  principal  amount  of  the
Outstanding  Securities of any series shall have requested the Trustee to call a
meeting of the Holders of Securities of such series for any purpose specified in
Section 1501, by written request  setting forth in reasonable  detail the action
proposed to be taken at the  meeting,  and the  Trustee  shall not have made the
first  publication of the notice of such meeting within 21 days after receipt of
such request or shall not thereafter  proceed to cause the meeting to be held as
provided herein, then the Company or the Holders of Securities of such series in
the amount above  specified,  as the case may be, may determine the time and the
place in the City of  Boston,  or in London for such  meeting  and may call such
meeting for such purposes by giving notice thereof as provided in subsection (a)
of this Section.

                  SECTION  1503.  Persons  Entitled to Vote at  Meetings.  To be
entitled to vote at any meeting of Holders of Securities of any series, a Person
shall be (1) a Holder of one or more Outstanding  Securities of such series,  or
(2) a Person  appointed  by an  instrument  in  writing as proxy for a Holder or
Holders of one or more  Outstanding  Securities of such series by such Holder or
Holders. The only Persons who shall be entitled to be present or to speak at any
meeting of Holders of Securities of any series shall be the Persons  entitled to
vote at such meeting and their counsel,  any  representatives of the Trustee and
its counsel and any representatives of the Company and its counsel.

                  SECTION 1504.  Quorum;  Action. The Persons entitled to vote a
majority in principal  amount of the  Outstanding  Securities  of a series shall
constitute  a quorum  for a meeting of Holders  of  Securities  of such  series;
provided,  however,  that if any  action  is to be  taken at such  meeting  with
respect to a consent or waiver which this  Indenture  expressly  provides may be
given by the Holders of not less than a specified percentage in principal amount
of the  Outstanding  Securities of a series,  the Persons  entitled to vote such
specified  percentage in principal amount of the Outstanding  Securities of such
series shall  constitute a quorum.  In the absence of a quorum within 30 minutes
after the time appointed for any such meeting, the meeting shall, if convened at
the request of Holders of Securities of such series, be dissolved.  In any other
case  the  meeting  may be  adjourned  for a  period  of not  less  than 10 days
determined  by the  chairman of the  meeting  prior to the  adjournment  of such
meeting.  In the  absence  of a  quorum  at any  such  adjourned  meeting,  such
adjourned meeting may be further adjourned for a period of not less than 10 days
as determined by the chairman of the meeting  prior to the  adjournment  of such
adjourned  meeting.  Notice of the reconvening of any adjourned meeting shall be
given as provided in Section 1502(a), except that such

                                       55
<PAGE>

notice  need be given  only once not less  than  five days  prior to the date on
which the meeting is scheduled to be  reconvened.  Notice of the  reconvening of
any adjourned  meeting shall state expressly the percentage,  as provided above,
of the principal amount of the Outstanding Securities of such series which shall
constitute a quorum.

                  Except  as  limited  by  the  proviso  to  Section   902,  any
resolution  presented to a meeting or adjourned meeting duly reconvened at which
a quorum is present as aforesaid may be adopted by the  affirmative  vote of the
Holders of a majority in principal amount of the Outstanding  Securities of that
series;  provided,  however,  that,  except as limited by the proviso to Section
902,  any  resolution  with  respect  to  any  request,  demand,  authorization,
direction,  notice,  consent,  waiver  or  other  action  which  this  Indenture
expressly  provides  may be made,  given or taken by the  Holders of a specified
percentage,  which  is  less  than  a  majority,  in  principal  amount  of  the
Outstanding  Securities  of a series may be adopted at a meeting or an adjourned
meeting  duly  reconvened  and at which a quorum is present as  aforesaid by the
affirmative vote of the Holders of such specified percentage in principal amount
of the Outstanding Securities of that series.

                  Any  resolution  passed or  decision  taken at any  meeting of
Holders of Securities  of any series duly held in  accordance  with this Section
shall be binding on all the Holders of Securities of such series and the related
coupons, whether or not present or represented at the meeting.

                  Notwithstanding the foregoing provisions of this Section 1504,
if any action is to be taken at a meeting of Holders of Securities of any series
with respect to any request, demand, authorization,  direction, notice, consent,
waiver or other action that this Indenture expressly provides may be made, given
or taken by the Holders of a specified  percentage  in  principal  amount of all
Outstanding  Securities  affected thereby,  or of the Holders of such series and
one or more additional series:

                           (i)  there shall be no minimum quorum requirement for
         such meeting; and

                           (ii)  the   principal   amount  of  the   Outstanding
         Securities of such series that vote in favor of such  request,  demand,
         authorization, direction, notice, consent, waiver or other action shall
         be taken into  account in  determining  whether such  request,  demand,
         authorization,  direction,  notice, consent, waiver or other action has
         been made, given or taken under this Indenture.

                  SECTION  1505.  Determination  of Voting  Rights;  Conduct and
Adjournment of Meetings.  (a)  Notwithstanding any provisions of this Indenture,
the Trustee may make such  reasonable  regulations  as it may deem advisable for
any  meeting  of  Holders  of  Securities  of a series in regard to proof of the
holding of  Securities of such series and of the  appointment  of proxies and in
regard to the appointment and duties of inspectors of votes,  the submission and
examination  of proxies,  certificates  and other evidence of the right to vote,
and such other  matters  concerning  the conduct of the meeting as it shall deem
appropriate.  Except as otherwise permitted or required by any such regulations,
the holding of Securities shall be proved in the manner specified in Section 104
and the  appointment  of any proxy  shall be proved in the manner  specified  in
Section  104 or by  having  the  signature  of the  Person  executing  the proxy
witnessed or  guaranteed  by any trust  company,  bank or banker  authorized  by
Section 104 to certify to the holding of Bearer Securities. Such regulations may
provide that written instruments appointing proxies,  regular on their face, may
be presumed  valid and genuine  without  the proof  specified  in Section 104 or
other proof.

                  (b) The Trustee shall,  by an instrument in writing  appoint a
temporary chairman of the meeting,  unless the meeting shall have been called by
the Company or by Holders of Securities as provided in Section 1502(b), in which
case the Company or the Holders of Securities of the series calling the meeting,
as the case  may be,  shall in like  manner  appoint  a  temporary  chairman.  A
permanent chairman and a permanent  secretary of the meeting shall be elected by
vote of the  Persons  entitled  to vote a majority  in  principal  amount of the
Outstanding Securities of such series represented at the meeting.

                                       56
<PAGE>

                  (c) At any meeting each Holder of a Security of such series or
proxy  shall be entitled  to one vote for each  $1,000  principal  amount of the
Outstanding  Securities  of such series held or  represented  by him;  provided,
however,  that no vote shall be cast or counted at any meeting in respect of any
Security  challenged as not Outstanding and ruled by the chairman of the meeting
to be not Outstanding.  The chairman of the meeting shall have no right to vote,
except as a Holder of a Security of such series or proxy.

                  (d) Any  meeting of Holders of  Securities  of any series duly
called  pursuant to Section  1502 at which a quorum is present may be  adjourned
from time to time by Persons  entitled to vote a majority in principal amount of
the Outstanding  Securities of such series  represented at the meeting,  and the
meeting may be held as so adjourned without further notice.

                  SECTION 1506. Counting Votes and Recording Action of Meetings.
The vote upon any  resolution  submitted to any meeting of Holders of Securities
of any series  shall be by  written  ballots on which  shall be  subscribed  the
signatures   of  the  Holders  of   Securities   of  such  series  or  of  their
representatives  by proxy and the  principal  amounts and serial  numbers of the
Outstanding Securities of such series held or represented by them. The permanent
chairman of the meeting  shall  appoint two  inspectors of votes who shall count
all votes cast at the meeting for or against any  resolution  and who shall make
and file with the secretary of the meeting  their  verified  written  reports in
duplicate of all votes cast at the meeting. A record, at least in duplicate,  of
the  proceedings of each meeting of Holders of Securities of any Series shall be
prepared  by the  secretary  of the  meeting and there shall be attached to said
record the  original  reports of the  inspectors  of votes on any vote by ballot
taken  thereat and  affidavits  by one or more persons  having  knowledge of the
fact,  setting  forth a copy of the notice of the meeting and showing  that said
notice was given as provided in Section 1502 and, if  applicable,  Section 1504.
Each copy  shall be signed  and  verified  by the  affidavits  of the  permanent
chairman  and  secretary  of the meeting and one such copy shall be delivered to
the  Company  and another to the Trustee to be  preserved  by the  Trustee,  the
latter to have attached thereto the ballots voted at the meeting.  Any record so
signed and verified shall be conclusive evidence of the matters therein stated.

                                       57
<PAGE>

                  This Indenture may be executed in any number of  counterparts,
each of which when so executed  shall be deemed to be an original,  but all such
counterparts shall together constitute but one and the same Indenture.

                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Indenture  to be duly  executed,  and  their  respective  corporate  seals to be
hereunto affixed and attested, all as of the day and year first above written.

                                  HEALTH AND RETIREMENT PROPERTIES TRUST


                                  By:___________________________
                                     Title:
[SEAL]

Attest:


- ----------------------------
Title:


                                  ----------------------------


                                  By:___________________________
                                     Title:

[SEAL]
Attest:


- ----------------------------
Title:




                                       58
<PAGE>



[COMMONWEALTH/STATE] OF                              )
                                                     ) ss:
COUNTY OF                                            )

         On the ___________ day of  ______________,  199_,  before me personally
came  ______________________,  to me known,  who,  being by me duly  sworn,  did
depose  and say that  he/she  is the  ______________  of HEALTH  AND  RETIREMENT
PROPERTIES  TRUST,  one of the  persons  described  in and  which  executed  the
foregoing  instrument;  that he/she knows the seal of said trust;  that the seal
affixed to said  instrument is such seal; that it was so affixed by authority of
the Board of said trust,  and that he/she  signed  his/her  name thereto by like
authority.

[Notarial Seal]


                                                     -----------------------
                                                     Notary Public
                                                     COMMISSION EXPIRES




[COMMONWEALTH/STATE] OF                              )
                                                     ) ss:
COUNTY OF                                            )

                  On the ______ day of _____________, 199_, before me personally
came ________________,  to me known, who, being by me duly sworn, did depose and
say that he/she is a _________________ of _________________,  one of the persons
described in and which executed the foregoing instrument;  that he/she knows the
seal of said corporation; that the seal affixed to said instrument is such seal;
that  it was so  affixed  by  authority  of  the  Board  of  Directors  of  said
corporation, and that he/she signed his/her name thereto by likely authority.

[Notarial Seal]

                                                     ---------------------------
                                                     Notary Public
                                                     COMMISSION EXPIRES



                                       59
<PAGE>

                                    EXHIBIT A

                             FORMS OF CERTIFICATION


                                   EXHIBIT A-1

               FORM OF CERTIFICATE TO BE GIVEN BY PERSON ENTITLED
                TO RECEIVE BEARER SECURITY OR TO OBTAIN INTEREST
                       PAYABLE PRIOR TO THE EXCHANGE DATE


[Insert title or sufficient description of Securities to be delivered]

                  This is to certify that, as of the date hereof,  and except as
set forth below, the above-captioned  Securities held by you for our account (i)
are owned by person(s)  that are not citizens or residents of the United States,
domestic  partnerships,  domestic corporations or any estate or trust the income
of which is subject to United States federal income  taxation  regardless of its
source ("United States  person(s)"),  (ii) are owned by United States  person(s)
that are (a) foreign branches of United States financial institutions (financial
institutions,   as  defined  in  United  States  Treasury   Regulations  Section
2.165-12(c)(1)(v) are herein referred to as "financial institutions") purchasing
for their own account or for resale, or (b) United States person(s) who acquired
the Securities through foreign branches of United States financial  institutions
and who hold the Securities through such United States financial institutions on
the  date  hereof  (and in  either  case (a) or (b),  each  such  United  States
financial  institutions  hereby agrees,  on its own behalf or through its agent,
that you may advise Health and Rehabilitation Properties Trust or its agent that
such  financial  institutions  will  comply  with the  requirements  of  Section
165(j)(3)(A),  (B) or (C) of the United States Internal Revenue Code of 1986, as
amended, and the regulations thereunder), or (iii) are owned by United States or
foreign  financial  institution(s)  for purposes of resale during the restricted
period   (as   defined   in   United   States   Treasury   Regulations   Section
1.163-5(c)(1)(i)(D)(7),  and, in  addition,  if the owner is a United  States or
foreign financial  institutions  described in clause (iii) above (whether or not
also  described  in clause (i) or (ii)),  this is to further  certify  that such
financial  institutions  has not acquired the  Securities for purposes of resale
directly  or  indirectly  to a United  States  person or to a person  within the
United States or its possessions.

                  As used herein,  "United  States"  means the United  States of
America   (including  the  States  and  the  District  of  Columbia);   and  its
"possessions"  include  Puerto Rico, the U.S.  Virgin  Islands,  Guam,  American
Samoa, Wake Island and the Northern Mariana Islands.

                  We  undertake  to advise you  promptly  by tested  telex on or
prior to the date on which you intend to submit your  certification  relating to
the  above-captioned  Securities  held by you for our account in accordance with
your Operating  Procedures if any applicable  statement herein is not correct on
such date,  and in the absence of any such  notification  it may be assumed that
this certification applies as of such date.

                  This  certificate  excepts  and does  not  relate  to  (U.S.$)
_______________ of such interest in the above-captioned Securities in respect of
which we are not able to certify and as to which we  understand  an exchange for
an interest in a Permanent  Global  Security or an exchange  for and delivery of
definitive  Securities (or, if relevant,  collection of any interest)  cannot be
made until we do so certify.

                  We  understand  that  this  certificate  may  be  required  in
connection with certain tax legislation in the United States.  If administrative
or legal  proceedings  are commenced or threatened in connection with which this
certificate  is or would be relevant,  we  irrevocably  authorize you to produce
this certificate or a copy thereof to any interested party in such proceedings.



                                       A-1

<PAGE>



Dated:                   , 19

[To be dated no earlier than the 15th day prior
to (i) the Exchange Date or (ii) the relevant
Interest Payment Date occurring prior to the
Exchange Date, as applicable]

                                       [Name of Person Making Certification]



                                       (Authorized Signatory)
                                       Name:
                                       Title:



                                       A-2

<PAGE>

                                   EXHIBIT A-2

                  FORM OF CERTIFICATE TO BE GIVEN BY EUROCLEAR
                AND CEDEL S.A. IN CONNECTION WITH THE EXCHANGE OF
                 A PORTION OF A TEMPORARY GLOBAL SECURITY OR TO
               OBTAIN INTEREST PAYABLE PRIOR TO THE EXCHANGE DATE

                                   CERTIFICATE

[Insert title or sufficient description of Securities to be delivered]

                  This  is  to   certify   that,   based   solely   on   written
certifications  that  we  have  received  in  writing,  by  tested  telex  or by
electronic  transmission  from each of the persons  appearing  in our records as
persons  entitled  to a portion of the  principal  amount  set forth  below (our
"Member  Organizations")  substantially in the form attached  hereto,  as of the
date hereof,  [U.S.$) principal amount of the above-captioned  Securities (i) is
owned by person(s)  that are not  citizens or  residents  of the United  States,
domestic  partnerships,  domestic corporations or any estate or trust the income
of which is subject to United States Federal income  taxation  regardless of its
source ("United  States  person(s)"),  (ii) is owned by United States  person(s)
that are (a) foreign branches of United States financial institutions (financial
institutions, as defined in U.S. Treasury Regulations Section 1.165- 12(c)(1)(v)
are herein  referred to as "financial  institutions")  purchasing  for their own
account  or  for  resale,  or (b)  United  States  person(s)  who  acquired  the
Securities through foreign branches of United States financial  institutions and
who hold the Securities through such United States financial institutions on the
date  hereof (and in either case (a) or (b),  each such  financial  institutions
will comply with the  requirements  of Section  165(j)(3)(A),  (B) or (C) of the
Internal Revenue Code of 1986, as amended, and the regulations  thereunder),  or
(iii) is owned by United States or foreign financial institution(s) for purposes
of resale during the  restricted  period (as defined in United  States  Treasury
Regulations  Section  1.163-5(c)(2)(i)(D)(7)),  and, to the further effect, that
financial  institutions  described  in clause  (iii) above  (whether or not also
described in clause (i) or (ii)) have  certified that they have not acquired the
Securities  for purposes of resale  directly or  indirectly  to a United  States
person or to a person within the United States or its possessions.

                  As used herein,  "United  States"  means the United  States of
America   (including  the  States  and  the  District  of  Columbia);   and  its
"possessions"  include  Puerto Rico, the U.S.  Virgin  Islands,  Guam,  American
Samoa, Wake Island and the Northern Mariana Islands.

                  We  further  certify  that  (i) we are  not  making  available
herewith for exchange (or, if relevant,  collection of any interest) any portion
of the temporary  global Security  representing the  above-captioned  Securities
excepted in the  above-referenced  certificates of Member Organizations and (ii)
as of the date  hereof we have not  received  any  notification  from any of our
Member  Organizations  to the effect  that the  statements  made by such  Member
Organizations  with  respect to any portion of the part  submitted  herewith for
exchange  (or, if relevant,  collection  of any interest) are no longer true and
cannot be relied upon as of the date hereof.

                  We  understand   that  this   certification   is  required  in
connection with certain tax legislation in the United States.  If administrative
or legal  proceedings  are commenced or threatened in connection with which this
certificate  is or would be relevant,  we  irrevocably  authorize you to produce
this certificate or a copy thereof to any interested party in such proceedings.


Date:                19

[To be dated no earlier than the Exchange Date
or the relevant  Interest Payment Date occurring 
prior to the Exchange Date, as applicable]

                                                      

                                  [Morgan Guaranty Trust Company
                                    New York, Brussels Office,]
                                       as Operator of the Euroclear System
                                  [Cedel S.A.]


                                       A-3


                                                                     Exhibit 5.1




                                SULLIVAN & WORCESTER LLP
                                ONE POST OFFICE SQUARE
                              BOSTON, MASSACHUSETTS 02109
                                    (617) 338-2800
                                 FAX NO. 617-338-2880
    IN WASHINGTON, D.C.                                    IN NEW YORK CITY
1025 CONNECTICUT AVENUE, N.W.                              767 THIRD AVENUE
   WASHINGTON, D.C. 20036                              NEW YORK, NEW YORK 10017
      (202) 775-8190                                         (212) 486-8200
   FAX NO. 202-293-2275                                    FAX NO. 212-758-2151


                                                          





                                  May 12, 1997


Health and Retirement Properties Trust
400 Centre Street
Newton, Massachusetts 02158

Ladies and Gentlemen:

         In connection with the registration by Health and Retirement Properties
Trust,  a  Maryland  real  estate  investment  trust (the  "Company"),  of up to
$870,096,875 in aggregate amount of (i) one or more series of debt securities of
the Company (the "Debt Securities"), (ii) one or more series of preferred shares
of  beneficial  interest,  without  par value,  of the Company  (the  "Preferred
Shares"),  (iii) depositary shares representing whole or fractional interests in
Preferred Shares ("Depositary Shares") evidenced by depositary receipts therefor
("Depositary  Receipts"),  (iv) common shares of beneficial  interest,  $.01 par
value,  of the Company (the "Common  Shares"),  or (v) warrants to purchase Debt
Securities, Preferred Shares, Depositary Shares or Common Shares (the "Warrants"
and, together with the Debt Securities,  Preferred Shares and Common Shares, the
"Registered Securities"),  for offering by the Company from time to time, as set
forth in the final prospectus which forms a part of the Registration  Statement,
as defined below (the "Prospectus"), and as to be set forth in one or more final
supplements to the Prospectus (each, a "Prospectus  Supplement"),  the following
opinion is furnished to the Company to be filed with the Securities and Exchange
Commission  (the  "Commission")  as Exhibit  5.1 to the  Company's  Registration
Statement  on Form S-3,  under  the  Securities  Act of 1933,  as  amended  (the
"Securities  Act"),  to be filed on or about  the date  hereof.  As used in this
opinion, the term "Registration  Statement" means, unless otherwise stated, such
Registration  Statement,  as amended when declared  effective by the  Commission
(including  any  necessary   post-effective   amendments   thereto);   the  term
"Convertible  Registered  Securities"  means  Registered  Securities  which  are
convertible   into,   exchangeable  for  or  exercisable  for  other  Registered
Securities, and the term "Underlying Registered Securities" means any Registered
Securities  which  are  issuable  upon  conversion,   exchange  or  exercise  of
Convertible Registered Securities.

         In  connection  with this  opinion,  we have examined and relied upon a
copy of the  Registration  Statement to be filed with the Commission on or about
the date hereof. We


<PAGE>


Health and Retirement Properties Trust
May 12, 1997
Page 2



have also  examined  and  relied  upon  originals  or  copies  of such  records,
agreements and instruments of the Company,  certificates of public officials and
of  officers  of the  Company and such other  documents  and  records,  and such
matters  of law,  as we  have  deemed  necessary  as a  basis  for the  opinions
hereinafter  expressed.  In  making  such  examination,   we  have  assumed  the
genuineness  of all  signatures,  the legal  capacity  of natural  persons,  the
authenticity of all documents submitted to us as originals and the conformity to
the  originals of all documents  submitted to us as copies,  which facts we have
not independently verified.

         We have necessarily  assumed in connection with the opinions  expressed
below that the terms and conditions of the Registered Securities and any related
indentures,  agreements and  instruments,  except to the extent described in the
Registration Statement and the form of preliminary prospectus contained therein,
as originally  filed,  will be, and that any related  proceedings of the Company
conducted  after the date hereof will be conducted,  (i) in accordance  with all
applicable laws and the Company's Amended and Restated  Declaration of Trust (as
currently  in effect,  the  "Declaration  of Trust") and By-laws and (ii) not in
conflict with any  contractual  or other  restrictions  which are binding on the
Company,  and that,  without limiting the generality of the foregoing,  that any
agreements or instruments which are hereafter required to be filed as an exhibit
to the Registration  Statement will be properly filed by an amendment thereto or
by the filing of a Form 8-K by the Company under the Securities  Exchange Act of
1934, as amended,  and properly  incorporated  by reference in the  Registration
Statement,  as permitted by the Securities Act and the rules and  regulations of
the Commission  thereunder.  We have also necessarily assumed in connection with
such  opinions  with  respect to any Common  Shares or  Preferred  Shares or any
Convertible  Registered Securities as to which Common Shares or Preferred Shares
are the related Underlying Securities that, at the time of the issuance thereof,
the Company will have a sufficient  number of shares of authorized Common Shares
or Preferred  Shares,  as the case may be, under the  Declaration of Trust which
will be unissued and not otherwise reserved for issuance.

         To the extent that the  obligations  of the Company under the Indenture
or any Warrant Agreement or Depositary  Agreement (each as defined below) may be
dependent  upon such matters,  we have assumed for purposes of this opinion that
the Trustee and each Warrant Agent and  Depositary  (each as defined  below) are
duly  organized,  validly  existing and in good standing under the laws of their
respective  jurisdictions of  organization,  and are duly qualified to engage in
the activities contemplated by, and have the requisite  organizational and legal
power and authority to perform their respective obligations under, the Indenture
and each Warrant  Agreement and Depositary  Agreement to which they are parties,
that the Trustee and each Warrant Agent and  Depositary  will be in  compliance,
generally  with respect to acting as a trustee or agent under the  Indenture and
each applicable Warrant Agreement and Depositary Agreement,  with all applicable
laws and  regulations,  and that the  Indenture  and any Warrant  Agreement  and
Depositary  Agreement  will be the valid and  binding  agreements  of each party
thereto  (other  than,  in the case of an indenture in the form filed as Exhibit
4.1 or 4.2 to the Registration Statement when appropriately completed, the


<PAGE>


Health and Retirement Properties Trust
May 12, 1997
Page 3



Company),  enforceable  against such parties in accordance with their respective
terms.

         We express no opinion herein as to the laws of any  jurisdiction  other
than the Commonwealth of Massachusetts and the federal law of the United States,
and we express no opinion as to state  securities  or blue sky laws.  Insofar as
this opinion  involves  matters of Maryland law we have,  with your  permission,
relied solely on the opinion of Piper & Marbury L.L.P., a copy of which is being
filed herewith as Exhibit 5.2 to the Registration Statement,  and our opinion is
subject to the exceptions, qualifications and limitations therein expressed.

         Our  opinions  set forth below with  respect to the validity or binding
effect of any  security or  obligation  are subject to (i)  limitations  arising
under applicable bankruptcy, insolvency, reorganization,  fraudulent conveyance,
moratorium or other  similar laws  affecting  the  enforcement  generally of the
rights and  remedies of  creditors  and secured  parties or the  obligations  of
debtors,  (ii) general principles of equity (regardless of whether considered in
a proceeding at law or in equity), including, without limitation, the discretion
of any court of  competent  jurisdiction  in granting  specific  performance  or
injunctive or other equitable  relief,  and (iii) an implied duty on the part of
the  party  seeking  to  enforce  rights or  remedies  to take  action  and make
determinations on a reasonable basis and in good faith to the extent required by
applicable law.

         Based on and subject to the  foregoing,  we are of the opinion that, as
of the date hereof:

                  1. Each series of Debt  Securities  will be validly issued and
         binding obligations of the Company when (i) the Registration  Statement
         shall have become effective under the Securities Act and the indentures
         filed as Exhibit 4.1 and 4.2 to the Registration  Statement,  including
         any necessary supplemental indenture, or any other indenture, including
         any necessary  supplemental  indenture thereto,  filed as an exhibit to
         the  Registration  Statement,  as  the  case  may  be  (the  applicable
         indenture, as so filed and supplemented,  the "Indenture"),  shall have
         been qualified under the Trust  Indenture Act of 1939, as amended,  and
         the Indenture shall have been duly  authorized,  executed and delivered
         by the Company and a trustee named thereunder (the  "Trustee"),  (ii) a
         Prospectus  Supplement with respect to such Debt Securities  shall have
         been  filed  with  the  Commission  pursuant  to  Rule  424  under  the
         Securities  Act,  (iii)  the  Company's  Board  of  Trustees  or a duly
         authorized  committee thereof shall have duly adopted final resolutions
         (the "Final Debt  Resolutions")  authorizing  the  issuance and sale of
         such Debt Securities as contemplated by the Registration Statement, the
         Prospectus, the applicable Prospectus Supplement and the Indenture, and
         (iv) such series of Debt  Securities  shall have been (A) duly executed
         by the  Company  and  authenticated  by the  Trustee as provided in the
         Indenture and the Final


<PAGE>


Health and Retirement Properties Trust
May 12, 1997
Page 4



         Debt  Resolutions  and  (B)  shall  have  been  duly  delivered  to the
         purchasers   thereof  against  payment  of  the  agreed   consideration
         therefor,  as provided in the Registration  Statement,  the Prospectus,
         the applicable Prospectus Supplement,  the Indenture and the Final Debt
         Resolutions.   If  such  Debt  Securities  are  Underlying   Registered
         Securities,  the opinion set forth in this  paragraph is subject to the
         further condition that the Convertible  Registered  Securities relating
         to such Debt Securities, at the time of the issuance thereof and of the
         conversion,  exchange or exercise  thereof,  are validly issued,  fully
         paid and  non-assessable  by the  Company  or are  validly  issued  and
         binding obligations of the Company, as applicable.

                  2. Each series of  Preferred  Shares  will be validly  issued,
         fully paid and  non-assessable by the Company when (i) the Registration
         Statement shall have become  effective under the Securities Act, (ii) a
         Prospectus  Supplement with respect to such Preferred Shares shall have
         been  filed  with  the  Commission  pursuant  to  Rule  424  under  the
         Securities  Act,  (iii)  the  Company's  Board  of  Trustees  or a duly
         authorized  committee thereof shall have duly adopted final resolutions
         (the "Final Preferred Shares Resolutions") authorizing the issuance and
         sale of such  Preferred  Shares  as  contemplated  by the  Registration
         Statement,  the Prospectus and the  applicable  Prospectus  Supplement,
         (iv) Articles  Supplementary  to the Declaration of Trust setting forth
         the terms of such series of Preferred Shares,  including establishing a
         sufficient   quantity   thereof  and  setting  forth  the  preferences,
         restrictions, limitations as to dividends, qualifications and terms and
         conditions of redemption,  consistent with the Final  Preferred  Shares
         Resolutions,  shall have been duly executed and filed with and accepted
         for record by the Department of  Assessments  and Taxation of the State
         of Maryland,  and (v)  certificates  evidencing  such Preferred  Shares
         shall have been duly  executed,  countersigned  and registered and duly
         delivered  to the  purchasers  thereof  against  payment  of the agreed
         consideration  therefor  (and in any event an amount at least  equal to
         the par  value,  if any,  thereof),  as  provided  in the  Registration
         Statement, the Prospectus, the applicable Prospectus Supplement and the
         Final  Preferred  Shares  Resolutions.  If such  Preferred  Shares  are
         Underlying  Registered  Securities,  the  opinion  set  forth  in  this
         paragraph  is subject to the  further  condition  that the  Convertible
         Registered Securities relating to such Preferred Shares, at the time of
         the  issuance  thereof  and of the  conversion,  exchange  or  exercise
         thereof,  are  validly  issued,  fully paid and  non-assessable  by the
         Company or are validly  issued and binding  obligations of the Company,
         as applicable.

                  3. The Depositary  Shares will be validly  issued,  fully paid
         and  non-assessable by the Company and the Depositary  Receipts will be
         validly  issued  and will  entitle  the  holders  thereof to the rights
         specified therein and in the applicable Depositary Agreement,  when (i)
         the  conditions  set forth in  paragraph  2 above  with  respect to the
         related  Preferred Shares are met, (ii) the Company's Board of Trustees
         or  a  duly  authorized  committee  thereof  shall  have  duly  adopted
         resolutions (the "Final


<PAGE>


Health and Retirement Properties Trust
May 12, 1997
Page 5



         Depositary  Shares  Resolutions")  approving  one  or  more  depositary
         agreements, including a form of Depositary Receipt set forth therein or
         related  thereto  (each,  a "Depositary  Agreement"),  relating to such
         Depositary  Shares,  between the  Company  and a financial  institution
         identified  therein as depositary  (each,  a  "Depositary"),  (iii) the
         applicable  Depositary  Agreement  shall  have been duly  executed  and
         delivered by the Company and the Depositary, (iv) the related Preferred
         Shares shall have been duly  deposited  with the  Depositary  under the
         Depositary and (v) the applicable  Depositary  Receipts shall have been
         duly  executed  by  the   Depositary  as  provided  in  the  applicable
         Depositary  Agreement and the Final Depositary  Shares  Resolutions and
         registered and shall have been duly delivered to the purchasers thereof
         against payment of the agreed  consideration  therefor,  as provided in
         the Registration Statement,  the Prospectus,  the applicable Prospectus
         Supplement,   the  applicable   Depositary   Agreement  and  the  Final
         Depositary Shares Resolutions.

                  4. The Common  Shares will be validly  issued,  fully paid and
         non-assessable by the Company when (i) the Registration Statement shall
         have become  effective  under the  Securities  Act,  (ii) a  Prospectus
         Supplement  with  respect to such Common  Shares  shall have been filed
         with the  Commission  pursuant  to Rule 424 under the  Securities  Act,
         (iii) the Company's  Board of Trustees or a duly  authorized  committee
         thereof  shall have duly adopted final  resolutions  (the "Final Common
         Shares  Resolutions")  authorizing the issuance and sale of such Common
         Shares as contemplated by the  Registration  Statement,  the Prospectus
         and  the  applicable  Prospectus  Supplement,   and  (iv)  certificates
         evidencing   such  Common   Shares  shall  have  been  duly   executed,
         countersigned  and  registered  and duly  delivered  to the  purchasers
         thereof  against payment of the agreed  consideration  therefor (and in
         any  event an  amount  at least  equal to the par  value  thereof),  as
         provided in the Registration Statement, the Prospectus,  the applicable
         Prospectus Supplement and the Final Common Shares Resolutions.  If such
         Common Shares are  Underlying  Registered  Securities,  the opinion set
         forth in this  paragraph is subject to the further  condition  that the
         Convertible  Registered  Securities  relating to such Common Shares, at
         the time of the  issuance  thereof and of the  conversion,  exchange or
         exercise thereof,  are validly issued, fully paid and non-assessable by
         the  Company or are  validly  issued  and  binding  obligations  of the
         Company, as applicable.

                  5. The Warrants will be duly authorized and validly issued and
         binding obligations of the Company when (i) the Registration  Statement
         shall have become effective under the Securities Act, (ii) a Prospectus
         Supplement with respect to such Warrants shall have been filed with the
         Commission  pursuant to Rule 424 under the  Securities  Act,  (iii) the
         Company's  Board of Trustees  or a duly  authorized  committee  thereof
         shall  have  duly  adopted  final   resolutions   (the  "Final  Warrant
         Resolutions")  authorizing  the issuance  and sale of such  Warrants as
         contemplated  by the  Registration  Statement,  the  Prospectus and the
         applicable Prospectus Supplement and


<PAGE>


Health and Retirement Properties Trust
May 12, 1997
Page 6


         approving one or more warrant  agreements,  including a form of warrant
         set forth therein or related  thereto  (each,  a "Warrant  Agreement"),
         establishing  the terms and  conditions of such  Warrants,  between the
         Company and a financial institution identified therein as warrant agent
         (each, a "Warrant Agent"),  (iv) the applicable Warrant Agreement shall
         have been duly  executed  and  delivered by the Company and the Warrant
         Agent,  and (v) such  Warrants  shall  have been duly  executed  by the
         Company  and  authenticated  by the  Warrant  Agent as  provided in the
         applicable  Warrant  Agreement  and the Final Warrant  Resolutions  and
         registered and shall have been duly delivered to the purchasers thereof
         against payment of the agreed  consideration  therefor,  as provided in
         the Registration Statement,  the Prospectus,  the applicable Prospectus
         Supplement,  the  applicable  Warrant  Agreement  and the Final Warrant
         Resolutions. If such Warrants are Underlying Registered Securities, the
         opinion set forth in this paragraph is subject to the further condition
         that the Convertible  Registered  Securities relating to such Warrants,
         at the time of the issuance thereof and of the conversion,  exchange or
         exercise thereof,  are validly issued, fully paid and non-assessable by
         the  Company or are  validly  issued  and  binding  obligations  of the
         Company, as applicable.

         With  respect  to  personal  liability  attaching  to  the  holders  of
Preferred  Shares,  Depositary  Shares or  Common  Shares,  we note the  matters
described in the Company's  Registration Statement on Form 8-A dated November 8,
1986,  as amended by the Company's  Form 8 dated July 30, 1991,  with respect to
Common Shares and  incorporated by reference into the Prospectus  forming a part
of the Registration Statement.

         We hereby  consent to the  filing of this  opinion as an exhibit to the
Registration  Statement  and to the  reference  to our  firm  in the  Prospectus
forming a part of the Registration  Statement. In giving such consent, we do not
thereby  admit that we come  within the  category  of persons  whose  consent is
required  under Section 7 of the Act or under the rules and  regulations  of the
Commission promulgated thereunder.

                                Very truly yours,

                                 /s/ Sullivan & Worcester LLP

                                 SULLIVAN & WORCESTER LLP



                                                                     EXHIBIT 5.2


                                 PIPER & MARBURY
                                     L.L.P.
                              CHARLES CENTER SOUTH
                             36 SOUTH CHARLES STREET
                         BALTIMORE, MARYLAND 21201-3018
                                  410-539-2530                  WASHINGTON
                                FAX: 410-539-0489                NEW YORK
                                                               PHILADELPHIA
                                                                  EASTON


                                   May 9, 1997


Health and Retirement Properties Trust
400 Centre Street
Newton, Massachusetts  02158

Sullivan & Worcester LLP
One Post Office Square
Boston, Massachusetts  02109

                  Re:      Registration Statement on Form S-3 of
                           Health and Retirement Properties Trust

Ladies and Gentlemen:

         We have acted as counsel to Health and Retirement  Properties  Trust, a
Maryland real estate  investment trust (the  "Company"),  in connection with the
preparation  of  a  Registration   Statement  on  Form  S-3  (the  "Registration
Statement") filed with the Securities and Exchange Commission (the "Commission")
under the  Securities  Act of 1933,  as amended  (the  "Securities  Act"),  with
respect to the  contemplated  issuance by the Company from time to time of up to
$1,000,000,000  aggregate public offering price of (i) unsecured debt securities
("Debt  Securities");  (ii)  preferred  shares  of  beneficial  interest  of the
Company,  par value $.01 per share ("Preferred  Shares") (iii) depositary shares
representing  whole or fractional  shares of the Preferred  Shares  ("Depositary
Shares")  evidenced by Depositary  Receipts therefor  ("Receipts");  (iv) common
shares of  beneficial  interest of the  Company,  par value $.01 share  ("Common
Shares");  and  (v)  warrants  of the  Company  to  purchase  any  of the  above
securities  ("Warrants,"  and  together  with Debt  Securities,  Common  Shares,
Preferred Shares and Depositary Shares, "Securities").

         In our capacity as Maryland counsel, we have reviewed the following:

         (a)      The  Declaration  of  Trust  of the  Company  certified  by an
                  officer of the Company,  as amended to date (the  "Declaration
                  of Trust");


<PAGE>
                                                                 Piper & Marbury
                                                                          L.L.P.

Health and Retirement Properties Trust
Sullivan & Worcester
May 9, 1997
Page 2




         (b)      A copy of the By-laws of the Company  certified  by an officer
                  of  the  Company,  as  in  effect  on  the  date  hereof  (the
                  "By-laws");

         (c)      The Registration Statement;

         (d)      Certified  resolutions of the Board of Trustees of the Company
                  authorizing the Registration Statement;

         (e)      A good  standing  certificate  for the  Company,  dated May 7,
                  1997,  issued by the Maryland State  Department of Assessments
                  and Taxation;

         (f)      An Officer's  Certificate  of the Company dated as of the date
                  hereof  as  to  certain   factual   matters  (the   "Officer's
                  Certificate"); and

         (g)      Such other  documents as we have  considered  necessary to the
                  rendering of the opinions expressed below.

         In   such   examination,   we   have   assumed,   without   independent
investigation,  the  genuineness  of all  signatures,  the legal capacity of all
individuals who have executed any of the aforesaid  documents,  the authenticity
of all documents submitted to us as originals,  the conformity with originals of
all documents submitted to us as copies and that all public records received are
accurate and complete. As to any facts material to this opinion which we did not
independently  establish  or verify,  we have relied  solely upon the  Officer's
Certificate.  In addition,  this opinion is based upon the  assumption  that the
Registration Statement and any required  post-effective  amendments thereto have
become effective under the Securities Act.

         On the basis of the foregoing we are of the opinion that:

         1. The  Company  has been duly  formed and is validly  existing in good
standing  as a real  estate  investment  trust  under  the laws of the  State of
Maryland.

         2. When (i) the terms of the Debt  Securities and of their issuance and
sale have been duly established in conformity with the Indenture relating to the
Debt  Securities  (the  "Indenture")  so as not to violate any applicable law or
result in a default under or breach of any agreement or instrument  binding upon
the Company and so as to comply with any requirement or restriction


<PAGE>


                                                                 Piper & Marbury
                                                                          L.L.P.

Health and Retirement Properties Trust
Sullivan & Worcester
May 9, 1997
Page 3



imposed by any court or governmental or regulatory body having jurisdiction over
the  Company;  and  (ii)  the  Debt  Securities  have  been  duly  executed  and
authenticated  in  accordance  with the  Indenture,  and duly issued and sold as
contemplated  by  the  Registration  Statement  and  any  prospectus  supplement
relating thereto, the Debt Securities (including any Debt Securities duly issued
upon exercise,  conversion or exchange of any other Securities  exercisable for,
convertible  into or exchangeable for Debt Securities) will constitute valid and
legally binding  obligations of the Company enforceable in accordance with their
terms,  subject  to  (a)  bankruptcy,  insolvency,  reorganization,   fraudulent
transfer,  moratorium and other similar laws now or hereafter in effect relating
to or affecting creditors rights generally, and (b) general principles of equity
(regardless of whether considered in a proceeding at law or in equity).

         3. When (i) the terms of the Preferred Shares and of their issuance and
sale  have  been  duly  established,  the  Preferred  Shares  have been duly and
properly authorized for issuance,  and Articles Supplementary to the Declaration
of Trust of the Company  classifying the Preferred  Shares and setting forth the
terms  thereof have been filed;  and (ii) such  Preferred  Shares have been duly
issued, sold and delivered as contemplated in the Registration Statement and any
prospectus  supplement  relating  thereto,  such Preferred Shares (including any
Preferred Shares duly issued upon exercise,  conversion or exchange of any other
Securities  exercisable  for,  convertible  into or  exchangeable  for Preferred
Shares) will be validly issued, fully paid and nonassessable.

         4. When (i) the Common  Shares have been duly and  properly  authorized
for  issuance;  and (ii) the  Common  Shares  have  been duly  issued,  sold and
delivered as  contemplated  in the  Registration  Statement  and any  prospectus
supplement relating thereto, the Common Shares (including any Common Shares duly
issued  upon the  exercise,  conversion  or  exchange  of any  other  Securities
exercisable for,  convertible  into or exchangeable for Common Shares),  will be
validly issued, fully paid and nonassessable.

         5. When (i) the Deposit  Agreement  relating to the  Depositary  Shares
(the "Deposit  Agreement") has been duly executed and delivered;  (ii) the terms
of the  Depositary  Shares  and of  their  issuance  and  sale  have  been  duly
established in conformity with the Deposit Agreement relating to such Depositary
Shares so as not to violate any  applicable  law or result in a default under or
breach of any  agreement  or  instrument  binding  upon the Company and so as to
comply with any requirement or restriction  imposed by any court or governmental
or regulatory body having jurisdiction over the Company;  (iii) the terms of the
Preferred Shares underlying the Depositary Shares and of their issuance and sale
have been duly  established,  the  Preferred  Shares have been duly and properly
authorized for issuance, and Articles Supplementary to the Declaration of Trust


<PAGE>


                                                                 Piper & Marbury
                                                                          L.L.P.

Health and Retirement Properties Trust
Sullivan & Worcester
May 9, 1997
Page 4


of the Company  classifying  the  Preferred  Shares and setting  forth the terms
thereof have been filed;  (iv) such Preferred  Shares have been duly authorized,
issued and paid for in the manner contemplated in the Registration Statement and
any prospectus  supplement relating thereto; and (v) the Receipts evidencing the
Depositary  Shares  have been duly issued  against the deposit of the  Preferred
Shares  in  accordance  with  the  Deposit  Agreement,  such  Depositary  Shares
(including  any  Depositary  Shares  duly issued upon  exercise,  conversion  or
exchange  of  any  other  Securities   exercisable  for,   convertible  into  or
exchangeable   for  Depositary   Shares)  will  be  validly  issued,   paid  and
nonassessable,  and such  Receipts  will be validly  issued and will entitle the
holders thereof to the rights specified therein and in the Deposit Agreement.

         6.  When  (i) the  Warrant  Agreement  relating  to the  Warrants  (the
"Warrant Agreement") has been duly executed and delivered; (ii) the terms of the
Warrants and of their issuance and sale have been duly established in conformity
with the Warrant  Agreement so as not to violate any applicable law or result in
a default  under or breach  of any  agreement  or  instrument  binding  upon the
Company and so as to comply with any  requirement or restriction  imposed by any
court or governmental or regulatory body having  jurisdiction  over the Company;
and (iii) the Warrants have been duly executed and  countersigned  in accordance
with the  Warrant  Agreement,  and issued and sold in the form and in the manner
contemplated  in  the  Registration  Statement  and  any  prospectus  supplement
relating  thereto,  such  Warrants  (including  any  Warrants  duly  issued upon
exercise,  conversion  or  exchange  of any other  Securities  exercisable  for,
convertible  into or exchangeable  for such Warrants) will constitute  valid and
legally binding  obligations of the Company enforceable in accordance with their
terms,  subject  to  (a)  bankruptcy,  insolvency,  reorganization,   fraudulent
transfer,  moratorium and other similar laws now or hereafter in effect relating
to or affecting  creditors'  rights  generally,  and (b) general  principles  of
equity (regardless of whether considered in a proceeding at law or in equity).

         The  foregoing  opinions  are  limited  to the  laws  of the  State  of
Maryland,  exclusive  of the  securities  or  "blue  sky"  laws of the  State of
Maryland.  We assume no obligation to supplement  this opinion if any applicable
laws change  after the date hereof or if we become aware of any facts that might
change the opinions expressed herein after the date hereof. We hereby consent to
the filing of this opinion as Exhibit 5 to the Registration Statement and to the
reference to our firm in the Registration Statement.

                                             Very truly yours,

                                             /s/ Piper& Marbury L.L.P.

                     HEALTH AND RETIREMENT PROPERTIES TRUST

                                   Exhibit 12
                    Computation of Earnings to Fixed Charges
                             (dollars in thousands)
<TABLE>
<CAPTION>


                                                                     YEARS ENDED DECEMBER 31,
                                                -------------------------------------------------------------------
                                                    1992          1993         1994          1995         1996
                                                    ----          ----         ----          ----         ----
<S>                                               <C>            <C>          <C>           <C>         <C>

EARNINGS:

INCOME BEFORE GAIN ON SALE OF
PROPERTIES AND
EXTRAORDINARY ITEMS                                  $27,243       $37,738      $57,578       $61,760      $ 77,164
ADJUSTMENT FOR FIXED CHARGES                          10,419        66,529       10,096        26,218        23,279
                                                    --------      --------     --------      --------     ---------
         TOTAL EARNINGS                              $37,662       $44,267      $67,974       $87,978      $100,443

FIXED CHARGES:

INTEREST EXPENSE                                     $ 9,466        $6,217      $ 8,965       $24,274       $22,545
AMORTIZATION                                             953           312        1,131         1,944           734
                                                   ---------      --------     --------      --------     ---------
         TOTAL FIXED CHARGES                         $10,419        $6,529      $10,096       $26,218       $23,279
RATIO OF EARNINGS TO FIXED
CHARGES                                                  3.6           6.8          6.7           3.4           4.3

</TABLE>



                                                            Exhibit 23.1


                         Consent of Independent Auditors

We  consent to the  reference  to our firm under the  caption  "Experts"  in the
Registration   Statement  (Form  S-3)  and  related  Prospectus  of  Health  and
Retirement  Properties Trust for the registration of  $1,000,000,000 of "Offered
Securities" and to the  incorporation  by reference  therein of our report dated
February 6, 1997,  with  respect to the  consolidated  financial  statements  of
Health and Retirement  Properties Trust  incorporated by reference in its Annual
Report  (Form  10-K)  for the year  ended  December  31,  1996  and the  related
financial  statement  schedules  included  therein filed with the Securities and
Exchange Commission.

                                                   /s/ Ernst & Young LLP
                                                   ERNST & YOUNG LLP

Boston, Massachusetts
May 9, 1997



                                                                   Exhibit 23.2

                  CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

         As   independent   public   accountants,   we  hereby  consent  to  the
incorporation  by reference in this  registration  statement of our report dated
January  10,  1997 on  Hospitality  Properties  Trust  included  in  Health  and
Retirement Properties Trust's Form 10-K for the year ended December 31, 1996 and
to all references to our Firm included in this registration statement.

                                               /s/ Arthur Andersen LLP

Washington, D.C.
May 9, 1997




<PAGE>






                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent  public  accountants,  we hereby consent to the  incorporation by
reference in Health and Retirement Properties Trust's registration  statement on
Form  S-3  of  our  report  dated   February  24,  1997   included  in  Marriott
International,  Inc.'s  Form 10-K for the year  ended  January 3, 1997 (File No.
1-12188)  and to all  references  to our  Firm  included  in  this  Registration
Statement.

                                                    /s/ Arthur Andersen LLP

Washington, D.C.
May 8, 1997




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