MAGMA COPPER CO
8-K, 1995-05-24
PRIMARY SMELTING & REFINING OF NONFERROUS METALS
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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    Form 8-K

                                 Current Report

                     Pursuant to Section 13 or 15(d) of the
                        Securities Exchange Act of 1934



Date of Report (Date of earliest event reported) May 15, 1995


                         MAGMA COPPER COMPANY 
------------------------------------------------------------------------------- 
     (Exact name of  registrant  as  specified in its charter)



     Delaware                       1-10122                  86-0219794    
------------------------------------------------------------------------------- 
(State or other jurisdiction       (Commission              (IRS Employer
of incorporation)                  File Number)             Identification No.)



 7400 North Oracle Road, Suite 200, Tucson, Arizona            85704     
-------------------------------------------------------------------------------
     (Address of principal executive offices)                 (Zip Code)



Registrant's telephone number, including area code   (520) 575-5600
                                                   ----------------------------


                           Not Applicable   
------------------------------------------------------------------------------- 
(Former name or former address, if changed since last report.)



<PAGE>


Item 5.  Other Events.

                  Goldman, Sachs & Co. and Merrill Lynch, Pierce, Fenner & Smith
Incorporated (the  "Underwriters") have agreed to underwrite an offering of $200
million  principal amount of the Company's 8.70% Senior  Subordinated  Notes due
May 15, 2005 (the "Notes").  This  transaction is being made pursuant to a shelf
registration  statement (File No.  33-53021) under which the Company may sell up
to an  aggregate  of $300  million of its  securities,  of which $200 million is
being sold as described above. The closing is expected to occur on May 25, 1995.

                  On May 16, 1995,  the Company  announced its offer to purchase
any and all of its outstanding Common Stock Warrants,  $8.50 Exercise Price (the
"Warrants"),  listed on the New York Stock  Exchange,  for $8.25 per  Warrant in
cash.  The offer and purchase of Warrants  tendered  will be made in  accordance
with an Offer to Purchase and Letter of Transmittal dated May 16, 1995.



Item 7.  Financial Statements, Pro Forma Financial Information and Exhibits.

    (c)           Exhibits.

    Exhibit
    Number        Description                                          Page

     1.0          Underwriting Agreement dated May 18, 1995
                  between the Registrant and Goldman, Sachs & Co.
                  and Merrill Lynch, Pierce, Fenner & Smith
                  Incorporated

     1.1          Pricing Agreement dated May 18, 1995 between
                  the Registrant, Goldman, Sachs & Co., and
                  Merrill Lynch, Pierce, Fenner & Smith
                  Incorporated

    12.0          Statement re computation of ratios

    15.0          Letter re unaudited interim financial information

    23.0          Consent of Independent Public Accountants

    99.1          Indenture dated as of May 15, 1995
                  between the Registrant and State Street Bank
                  and Trust Company

    99.2          Supplemental Indenture dated as of May 15, 1995
                  between the Registrant and State Street Bank
                  and Trust Company

    99.3          Form of Note Certificate




<PAGE>


                                   SIGNATURES


                  Pursuant to the requirements of the Securities Exchange Act of
1934,  the  registrant has duly caused this report to be signed on its behalf by
the undersigned hereunto duly authorized.

Date: May 23, 1995

                                             MAGMA COPPER COMPANY,
                                             a Delaware corporation


                                             By:      s/s Douglas J. Purdom
                                                -------------------------------
                                             Its: Vice President and
                                                  Chief Financial Officer







                              Magma Copper Company
                                Debt Securities

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


                             Underwriting Agreement



                                                                   May 18, 1995

Goldman, Sachs & Co.
Merrill Lynch, Pierce, Fenner
  & Smith Incorporated
c/o Goldman, Sachs & Co.
85 Broad Street
New York, New York  10004


Dear Sirs:

                  From time to time Magma Copper Company, a Delaware corporation
(the "Company"),  proposes to enter into one or more Pricing  Agreements (each a
"Pricing  Agreement")  in the form of Annex I hereto,  with such  additions  and
deletions as the parties  thereto may determine,  and,  subject to the terms and
conditions  stated  herein and therein,  to issue and sell to the firms named in
Schedule I to the applicable  Pricing  Agreement  (such firms  constituting  the
"Underwriters"  with  respect  to such  Pricing  Agreement  and  the  securities
specified   therein)  certain  of  its  debt  securities  ("Debt   Securities"),
convertible  debt  securities  (the   "Convertible   Securities")   and/or  Debt
Securities  to which  warrants  (the  "Warrants")  for the purchase of shares of
capital stock ("Stock") of the Company will be attached specified in Schedule II
to such Pricing  Agreement.  The Debt  Securities,  Convertible  Securities  and
Warrants  are  herein  called  the  Securities,  and the  Securities  which  the
Underwriters  elect to purchase  pursuant to such Pricing  Agreement  are herein
called the "Designated Securities."

                  The terms and rights of any particular  issuance of Designated
Securities shall be as specified in the Pricing  Agreement  relating thereto and
in or pursuant to the indenture (the  "Indenture") or the warrant agreement (the
"Warrant Agreement") identified in such Pricing Agreement.

                  1. Particular sales of Designated  Securities may be made from
time  to  time to the  Underwriters  of such  Securities,  for  whom  the  firms
designated as  representatives  of the  Underwriters  of such  Securities in the
Pricing   Agreement   relating   thereto  will  act  as   representatives   (the
"Representatives").  The term  "Representatives"  also  refers to a single  firm
acting as sole  representative  of the  Underwriters and to Underwriters who act
without any firm being  designated as their  representative.  This  Underwriting
Agreement  shall not be construed as an obligation of the Company to sell any of
the  Securities or as an obligation of any of the  Underwriters  to purchase the
Securities.  The  obligation  of  the  Company  to  issue  and  sell  any of the
Securities and the obligation of any of the  Underwriters to purchase any of the
Securities  shall be  evidenced  by the Pricing  Agreement  with  respect to the
Designated  Securities specified therein.  Each Pricing Agreement shall specify,
as applicable, the aggregate principal amount of such Designated Securities, the
initial public offering price of such Designated Securities,  the purchase price
to the Underwriters of such Designated Securities, the names of the Underwriters
of  such  Designated  Securities,  the  names  of the  Representatives  of  such
Underwriters  and the  principal  amount  of such  Designated  Securities  to be
purchased  by each  Underwriter  and the  commission,  if  any,  payable  to the
Underwriters  with respect thereto and shall set forth the date, time and manner
of delivery of such  Designated  Securities  and payment  therefor.  The Pricing
Agreement  shall also  specify (to the extent not set forth in the  Indenture or
Warrant  Agreement and the  registration  statement and prospectus  with respect
thereto) the terms of such Designated  Securities.  A Pricing Agreement shall be
in the form of an executed  writing (which may be in  counterparts),  and may be
evidenced  by an  exchange  of  telegraphic  communications  or any other  rapid
transmission  device  designed  to  produce a written  record of  communications
transmitted.  The obligations of the Underwriters  under this Agreement and each
Pricing Agreement shall be several and not joint.

                  2. The Company  represents  and  warrants to, and agrees with,
each of the Underwriters that:

                  (a) A registration  statement in respect of the Securities and
         shares of Stock issuable upon conversion of the Convertible  Securities
         or upon  exercise of the  Warrants,  as the case may be, has been filed
         with the Securities and Exchange  Commission (the  "Commission");  such
         registration  statement and any post-effective  amendment thereto, each
         in  the  form   heretofore   delivered   or  to  be  delivered  to  the
         Representatives and, excluding exhibits to such registration statement,
         but including all documents incorporated by reference in the prospectus
         contained  therein,  to the  Representatives  for  each  of  the  other
         Underwriters,  have been declared  effective by the  Commission in such
         form; no other document with respect to such registration  statement or
         document  incorporated by reference  therein has heretofore been filed,
         or  transmitted  for  filing,  with the  Commission;  and no stop order
         suspending the  effectiveness of such  registration  statement has been
         issued and no proceeding for that purpose has been initiated or, to the
         Company's  knowledge,  threatened by the  Commission  (any  preliminary
         prospectus  included in such  registration  statement or filed with the
         Commission  pursuant to Rule 424(a) of the rules and regulations of the
         Commission  under the  Securities  Act of 1933, as amended (the "Act"),
         being hereinafter called a "Preliminary Prospectus";  the various parts
         of such registration statement,  including all exhibits thereto and the
         documents  incorporated by reference in the prospectus contained in the
         registration  statement  at the  time  such  part  of the  registration
         statement  became  effective but excluding Form T-1, each as amended at
         the time  such part of the  registration  statement  became  effective,
         being hereinafter called the "Registration  Statement";  the prospectus
         relating to the  Securities,  in the form in which it has most recently
         been filed, or transmitted for filing,  with the Commission on or prior
         to  the  date  of  this  Agreement,   being   hereinafter   called  the
         "Prospectus"; any reference herein to any Preliminary Prospectus or the
         Prospectus  shall  be  deemed  to refer to and  include  the  documents
         incorporated by reference therein pursuant to the applicable form under
         the Act, as of the date of such  Preliminary  Prospectus or Prospectus,
         as the case may be; any reference to any amendment or supplement to any
         Preliminary  Prospectus or the  Prospectus  shall be deemed to refer to
         and include  any  documents  filed  after the date of such  Preliminary
         Prospectus  or  Prospectus,  as the case may be,  under the  Securities
         Exchange Act of 1934, as amended (the "Exchange Act"), and incorporated
         by reference in such Preliminary Prospectus or Prospectus,  as the case
         may be; any  reference to any amendment to the  Registration  Statement
         shall be  deemed  to refer to and  include  any  annual  report  of the
         Company  filed  pursuant to Section  13(a) or 15(d) of the Exchange Act
         after  the  effective  date  of  the  Registration  Statement  that  is
         incorporated  by  reference  in the  Registration  Statement;  and  any
         reference to the Prospectus as amended or supplemented  shall be deemed
         to refer to the  Prospectus as amended or  supplemented  in relation to
         the applicable  Designated  Securities in the form in which it is filed
         with the Commission pursuant to Rule 424(b) under the Act in accordance
         with Section 5(a)  hereof,  including  any  documents  incorporated  by
         reference therein as of the date of such filing);

                  (b) The documents incorporated by reference in the Prospectus,
         when they became  effective or were filed with the  Commission,  as the
         case may be, conformed in all material  respects to the requirements of
         the  Act  or the  Exchange  Act,  as  applicable,  and  the  rules  and
         regulations  of the Commission  thereunder,  and none of such documents
         contained an untrue  statement of a material fact or omitted to state a
         material  fact  required to be stated  therein or necessary to make the
         statements  therein not misleading;  and any further documents so filed
         and  incorporated  by  reference  in  the  Prospectus  or  any  further
         amendment or supplement  thereto,  when such documents become effective
         or are filed with the  Commission,  as the case may be, will conform in
         all material  respects to the  requirements  of the Act or the Exchange
         Act, as  applicable,  and the rules and  regulations  of the Commission
         thereunder and will not contain an untrue  statement of a material fact
         or omit to state a  material  fact  required  to be stated  therein  or
         necessary  to make the  statements  therein not  misleading;  provided,
         however,  that this  representation and warranty shall not apply to any
         statements or omissions  made in reliance  upon and in conformity  with
         information  furnished in writing to the Company by an  Underwriter  of
         Designated Securities through the Representatives  expressly for use in
         the Prospectus as amended or supplemented relating to such Securities;

                  (c)  No  order   preventing  or  suspending  the  use  of  any
         Preliminary  Prospectus  has been  issued by the  Commission,  and each
         Preliminary Prospectus, at the time of filing thereof, conformed in all
         material  respects  to  the  requirements  of the  Act  and  the  Trust
         Indenture Act of 1939, as amended (the "Trust  Indenture Act"), and the
         rules and regulations of the Commission thereunder, and did not contain
         an untrue statement of a material fact or omit to state a material fact
         required  to be stated  therein  or  necessary  to make the  statements
         therein,  in the light of the circumstances under which they were made,
         not  misleading;   provided,  however,  that  this  representation  and
         warranty  shall  not  apply  to any  statements  or  omissions  made in
         reliance upon and in conformity with  information  furnished in writing
         to the Company by an Underwriter of Designated  Securities  through the
         Representatives expressly for use therein;

                  (d) The Registration Statement and the Prospectus conform, and
         any further amendments or supplements to the Registration  Statement or
         the  Prospectus  will  conform,   in  all  material   respects  to  the
         requirements  of the Act and the Trust  Indenture Act and the rules and
         regulations of the Commission thereunder and do not and will not, as of
         the applicable effective date as to the Registration  Statement and any
         amendment  thereto  and  as of the  applicable  filing  date  as to the
         Prospectus and any amendment or supplement  thereto,  contain an untrue
         statement of a material  fact or omit to state a material fact required
         to be stated  therein or necessary to make the  statements  therein not
         misleading;  provided,  however,  that this representation and warranty
         shall not apply to any  statements  or omissions  made in reliance upon
         and in conformity with information  furnished in writing to the Company
         by an Underwriter of Designated  Securities through the Representatives
         expressly for use in the Prospectus as amended or supplemented relating
         to such Securities;

                  (e)  Neither  the  Company  nor  any of its  subsidiaries  has
         sustained  since the date of the latest  audited  financial  statements
         included or  incorporated  by reference in the  Prospectus any material
         loss or interference with its business from fire,  explosion,  flood or
         other calamity,  whether or not covered by insurance, or from any labor
         dispute or court or  governmental  action,  order or decree,  otherwise
         than as set forth or  contemplated  in the  Prospectus;  and, since the
         respective  dates as of which  information is given in the Registration
         Statement  and the  Prospectus,  there  has not been any  change in the
         capital  stock  or  long-term  debt  of  the  Company  or  any  of  its
         subsidiaries  or  any  material  adverse  change,  or  any  development
         involving a prospective  material  adverse change,  in or affecting the
         general affairs, management,  financial position,  stockholders' equity
         or results of operations of the Company and its subsidiaries taken as a
         whole, otherwise than as set forth or contemplated in the Prospectus;

                  (f)  The  Company  and  its  subsidiaries  hold  rights  to or
         interest  in the lands,  minerals  and  improvements  upon which  their
         material  operations  are located,  either in fee simple,  under valid,
         subsisting and enforceable leases, or through unpatented mining claims,
         contracts,  licenses or permits,  as the case may be, together with any
         necessary easements, rights-of-way or other surface access rights, with
         such  exceptions as are described in the Prospectus and, to the best of
         the Company's  knowledge,  free and clear of all liens and encumbrances
         created by,  through or under the Company  (except as to such liens and
         encumbrances  which do not materially affect the value of such property
         or materially  interfere  with uses made or proposed to be made of such
         property);

                  (g) The  Company  has been duly  incorporated  and is  validly
         existing as a corporation  in good standing under the laws of Delaware,
         with power and authority  (corporate  and other) to own its  properties
         and conduct its business as described in the  Prospectus,  and has been
         duly qualified as a foreign corporation for the transaction of business
         and is in good standing  under the laws of each other  jurisdiction  in
         which it owns or leases properties,  or conducts any business, so as to
         require such  qualification,  or is subject to no material liability or
         disability  by reason of the  failure  to be so  qualified  in any such
         jurisdiction;  and  each  subsidiary  of  the  Company  has  been  duly
         incorporated  and is validly existing as a corporation in good standing
         under the laws of its jurisdiction of incorporation;

                  (h) The Company has an authorized  capitalization as set forth
         in the Prospectus, and all of the issued shares of capital stock of the
         Company have been duly and validly  authorized and issued and are fully
         paid and non-assessable,  and all of the issued shares of capital stock
         of each subsidiary of the Company have been duly and validly authorized
         and issued, are fully paid and non-assessable and are owned directly or
         indirectly by the Company, free and clear of all liens, encumbrances or
         claims;

                  (i) The  Securities  have  been  duly  authorized,  and,  when
         Designated  Securities  are  issued  and  delivered  pursuant  to  this
         Agreement  and the Pricing  Agreement  with respect to such  Designated
         Securities,  such  Designated  Securities will have been duly executed,
         authenticated or, in the case of Warrants, countersigned by the Warrant
         Agent as provided in the Warrant  Agreement,  issued and  delivered and
         will constitute  valid and legally  binding  obligations to the Company
         entitled  to the  benefits  provided  by the  Indenture  or the Warrant
         Agreement,  as the case may be, each of which will be  substantially in
         the form filed as an exhibit to the Registration Statement; the Warrant
         Agreement  has been duly  authorized  and the  Indenture  has been duly
         authorized and duly qualified under the Trust Indenture Act and, at the
         Time of Delivery for such Designated  Securities (as defined in Section
         4 hereof), the Indenture or the Warrant Agreement,  as the case may be,
         will constitute a valid and legally binding instrument,  enforceable in
         accordance with its terms,  subject, as to enforcement,  to bankruptcy,
         insolvency,  reorganization  and other  laws of  general  applicability
         relating  to or  affecting  creditors'  rights  and to  general  equity
         principles;  and  each  of the  Indenture  and  the  Warrant  Agreement
         conforms,   and  the  Designated   Securities  will  conform,   to  the
         descriptions   thereof  contained  in  the  Prospectus  as  amended  or
         supplemented  with respect to such Designated  Securities to the extent
         described therein;

                  (j) The issue and sale of the Securities and the compliance by
         the Company with all of the provisions of the Securities, the Indenture
         or the Warrant  Agreement,  as the case may be, this  Agreement and any
         Pricing Agreement,  and the consummation of the transactions herein and
         therein  contemplated  will not conflict  with or result in a breach or
         violation of any of the terms or provisions of, or constitute a default
         under,  any  indenture,  warrant  agreement,  mortgage,  deed of trust,
         sale/leaseback  agreement,  loan  agreement or other similar  financing
         agreement  or other  material  agreement  or  instrument  to which  the
         Company is a party or by which the  Company is bound or to which any of
         the property or assets of the Company is subject,  nor will such action
         result  in any  violation  of the  provisions  of  the  Certificate  of
         Incorporation  or By-laws of the  Company or any  statute or any order,
         rule or regulation of any court or  governmental  agency or body having
         jurisdiction over the Company or any of its properties; and no consent,
         approval,  authorization,  order,  registration or  qualification of or
         with any such court or governmental  agency or body is required for the
         issue and sale of the Securities or the  consummation by the Company of
         the  transactions   contemplated  by  this  Agreement  or  any  Pricing
         Agreement  or the  Indenture or the Warrant  Agreement,  except such as
         have been,  or will have been prior to the Time of  Delivery,  obtained
         under the Act and the Trust Indenture Act and such consents, approvals,
         authorizations,  registrations  or  qualifications  as may be  required
         under state securities or Blue Sky laws in connection with the purchase
         and distribution of the Securities by the Underwriters;

                  (k) Other  than as set forth in the  Prospectus,  there are no
         legal or governmental  proceedings  pending to which the Company or any
         of its  subsidiaries is a party or of which any property of the Company
         or  any of  its  subsidiaries  is the  subject,  which,  if  determined
         adversely to the Company or any of its subsidiaries, would individually
         or in the aggregate have a material  adverse effect on the consolidated
         financial  position,  stockholders'  equity or results of operations of
         the  Company,and  its  subsidiaries;  and, to the best of the Company's
         knowledge,  no such  proceedings  are  threatened  or  contemplated  by
         governmental authorities or threatened by others;

                  (l) Except as described in the Prospectus, the Company and its
         subsidiaries  each owns,  possesses  or has  obtained  all  patents and
         licenses, franchises, permits, certificates,  consents, orders, grants,
         easements,   approvals  and  other   authorizations  of  any  court  or
         governmental  agency or body or other  third  party  necessary  to own,
         lease,  stake or maintain  material claims and other material  property
         interests,  as the case may be, and to operate its material  properties
         and carry on its  business as  presently  conducted,  except (i) to the
         extent  that the  failure to so own,  possess or obtain  such  patents,
         licenses, franchises, permits, certificates, orders, grants, easements,
         approvals or authorizations would not have a material adverse effect on
         the Company and its subsidiaries, taken as a whole and (ii) for permits
         for which the  Company has timely made  application  and is  diligently
         pursuing  and with  respect  to which the  Company is  carrying  on its
         business with the  acquiescence of applicable  regulatory  authorities;
         and

                  (m)  Arthur  Andersen  &  Co.,  who  have  certified   certain
         financial   statements  of  the  Company  and  its  subsidiaries,   are
         independent public accountants as required by the Act and the rules and
         regulations of the Commission thereunder.

                  3. Upon the execution of the Pricing  Agreement  applicable to
any  Designated  Securities  and  authorization  by the  Representatives  of the
release of such Designated Securities, the several Underwriters propose to offer
such  Designated  Securities for sale upon the terms and conditions set forth in
the Prospectus as amended or supplemented.

                  4. Designated  Securities to be purchased by each  Underwriter
pursuant to the Pricing Agreement  relating  thereto,  in definitive form to the
extent practicable,  and in such authorized denominations and registered in such
names as the  Representatives may request upon at least forty-eight hours' prior
notice to the Company,  shall be delivered by or on behalf of the Company to the
Representatives  for the account of such  Underwriter,  against  payment by such
Underwriter  or on its behalf of the  purchase  price  therefor by  certified or
official bank check or checks,  payable to the order of the Company in the funds
specified  in such  Pricing  Agreement,  all at the  place  and  time  and  date
specified in such Pricing  Agreement or at such other place and time and date as
the  Representatives  and the Company  may agree upon in writing,  such time and
date  being  herein  called the "Time of  Delivery"  for such  Securities.  Such
certificates  will be  made  available  for  checking  and  packaging  at  least
twenty-four  hours  prior  to  the  Time  of  Delivery  at  the  office  of  the
Representatives specified in the Pricing Agreement.

                  5. The  Company  agrees with each of the  Underwriters  of any
Designated Securities:

                  (a) To prepare the Prospectus as amended and  supplemented  in
         relation to the applicable  Designated Securities in a form approved by
         the Representatives and to file such Prospectus pursuant to Rule 424(b)
         under the Act not later than the Commission's  close of business on the
         second business day following the execution and delivery of the Pricing
         Agreement  relating  to the  applicable  Designated  Securities  or, if
         applicable,  such earlier  time as may be required by Rule  424(b);  to
         make  no  further  amendment  or any  supplement  to  the  Registration
         Statement or  Prospectus as amended or  supplemented  after the date of
         the Pricing Agreement relating to such Securities and prior to the Time
         of  Delivery  for such  Securities  which shall be  disapproved  by the
         Representatives  for such Securities  promptly after reasonable  notice
         thereof; to advise the  Representatives  promptly of any such amendment
         or   supplement   after  such  Time  of   Delivery   and   furnish  the
         Representatives  with copies thereof;  to file promptly all reports and
         any definitive proxy or information  statements required to be filed by
         the Company with the Commission pursuant to Section 13(a), 13(c), 14 or
         15(d) of the  Exchange  Act for so long as the delivery of a prospectus
         is required in connection with the offering or sale of such Securities,
         and during  such same  period to advise the  Representatives,  promptly
         after it receives notice thereof, of the time when any amendment to the
         Registration  Statement  has  been  filed  or  becomes effective or any
         supplement to the  Prospectus or any amended  Prospectus has been filed
         with the  Commission,  of the  issuance by the  Commission  of any stop
         order  or of  any  order  preventing  or  suspending  the  use  of  any
         prospectus  relating  to the  Securities,  including,  in the  case  of
         Convertible  Securities or Warrants,  the shares of Stock issuable upon
         conversion  of the  Convertible  Securities  or  upon  exercise  of the
         Warrants,  of the suspension of the qualification of such Securities or
         Stock for offering or sale in any  jurisdiction,  of the  initiation or
         threatening of any  proceeding for any such purpose,  or of any request
         by the Commission for the amending or supplementing of the Registration
         Statement or  Prospectus  or for  additional  information;  and, in the
         event of the  issuance  of any  such  stop  order or of any such  order
         preventing  or  suspending  the use of any  prospectus  relating to the
         Securities  or  Stock or  suspending  any  such  qualification,  to use
         promptly its best efforts to obtain its withdrawal;

                  (b)  Promptly  from  time to time to take  such  action as the
         Representatives  may  reasonably  request  to qualify  the  Securities,
         including in the case of Convertible Securities or Warrants, the shares
         of Stock issuable upon conversion of the Convertible Securities or upon
         exercise of the Warrants  for  offering  and sale under the  securities
         laws of such  jurisdictions as the  Representatives  may request and to
         comply  with  such laws so as to permit  the  continuance  of sales and
         dealings therein in such  jurisdictions for as long as may be necessary
         to complete  the  distribution  of such  Securities,  provided  that in
         connection  therewith the Company shall not be required to qualify as a
         foreign  corporation or to file a general consent to service of process
         in any jurisdiction;

                  (c) To furnish the Underwriters  with copies of the Prospectus
         as amended or supplemented  in such  quantities as the  Representatives
         may from time to time  reasonably  request,  and, if the  delivery of a
         prospectus is required at any time in  connection  with the offering or
         sale of the Securities, including in the case of Convertible Securities
         or  Warrants,  the  shares of Stock  issuable  upon  conversion  of the
         Convertible  Securities or upon exercise of the Warrants and if at such
         time any event shall have occurred as a result of which the  Prospectus
         as then amended or supplemented  would include an untrue statement of a
         material fact or omit to state any material fact  necessary in order to
         make the statements  therein,  in the light of the circumstances  under
         which they were made when such Prospectus is delivered, not misleading,
         or, if for any  other  reason it shall be  necessary  during  such same
         period  to amend or  supplement  the  Prospectus  or to file  under the
         Exchange Act any document  incorporated  by reference in the Prospectus
         in  order  to  comply  with  the Act,  the  Exchange  Act or the  Trust
         Indenture Act, to notify the  Representatives and upon their request to
         file such  document and to prepare and furnish  without  charge to each
         Underwriter  and to any  dealer  in  securities  as many  copies as the
         Representatives  may from time to time reasonably request of an amended
         Prospectus  or a supplement to the  Prospectus  which will correct such
         statement or omission or effect such compliance;

                  (d) To make generally available to its securityholders as soon
         as  practicable,  but in any event not later than eighteen months after
         the effective  date of the  Registration  Statement (as defined in Rule
         158(c)),  an earning  statement  of the  Company  and its  subsidiaries
         (which need not be audited) complying with Section 11(a) of the Act and
         the rules and  regulations of the Commission  thereunder  (including at
         the option of the Company Rule 158);

                  (e) During the period  beginning  from the date of the Pricing
         Agreement  for  such  Designated   Securities  and  continuing  to  and
         including the later of (i) the termination of trading  restrictions for
         such  Designated  Securities,   as  notified  to  the  Company  by  the
         Representatives  and  (ii)  the Time of  Delivery  for such  Designated
         Securities,  not to offer, sell,  contract to sell or otherwise dispose
         of any securities of the Company (other than pursuant to employee stock
         option plans existing or on the  conversion of  convertible  securities
         outstanding  on  the  date  of  such  Pricing   Agreement)   which  are
         substantially similar to such Designated Securities,  without the prior
         written consent of the Representatives;

                  (f) During a period of five years from the  effective  date of
         the Registration  Statement,  to furnish to the Underwriters  copies of
         all reports or other  communications  (financial or other) furnished to
         stockholders,  and deliver to the  Underwriters (i) as soon as they are
         available,  copies of any reports and financial statements furnished to
         or filed with the  Commission  or any national  securities  exchange on
         which the  Securities  or any class of  securities  of the  Company  is
         listed,  and (ii) such additional  information  concerning the business
         and financial  condition of the Company as the Representatives may from
         time to time reasonably  request (such financial  statements to be on a
         consolidated  basis to the extent the  accounts  of the Company and its
         subsidiaries  are  consolidated  in reports  furnished to  stockholders
         generally or to the Commission);

                  (g) To use its best efforts to maintain the  effectiveness  of
         the  Registration  Statement  during the entire period during which the
         Convertible  Securities  may  be  convertible  or the  Warrants  may be
         exercised; and

                  (h) To  reserve  and  keep  available  at all  times,  free of
         preemptive  rights,  shares of Stock for the  purpose of  enabling  the
         Company to satisfy any  obligations  to issue  shares of its Stock upon
         conversion of the Convertible Securities or exercise of the Warrants.


                  6.  The  Company   covenants   and  agrees  with  the  several
Underwriters  that the Company will pay or cause to be paid the  following:  (i)
the fees, disbursements and expenses of the Company's counsel and accountants in
connection  with the  registration  of the  Securities  and the  shares of Stock
issuable upon conversion of the  Convertible  Securities or upon exercise of the
Warrants  under  the  Act  and  all  other  expenses  in  connection   with  the
preparation,  printing and filing of the Registration Statement, any Preliminary
Prospectus and the Prospectus  and  amendments and  supplements  thereto and the
mailing and delivering of copies thereof to the Underwriters  and dealers;  (ii)
the cost of  printing  or  producing  any  Agreement  among  Underwriters,  this
Agreement, any Pricing Agreement, any Indenture, any Warrant Agreement, any Blue
Sky and Legal  Investment  Memoranda and any other  documents in connection with
the offering,  purchase, sale and delivery of the Securities; (iii) all expenses
in connection with the  qualification  of the Securities and the Shares issuable
upon conversion of the  Convertible  Securities or upon exercise of the Warrants
for  offering and sale under state  securities  laws as provided in Section 5(b)
hereof,  including the fees and disbursements of counsel for the Underwriters in
connection with such qualification and in connection with the Blue Sky and legal
investment  survey(s);  (iv) any fees charged by securities  rating services for
rating the  Securities;  (v) any filing fees incident to any required  review by
the National Association of Securities Dealers, Inc. of the terms of the sale of
the Securities;  (vi) the cost of preparing the  Securities;  (vii) the fees and
expenses of any Trustee or Warrant Agent and any agent of any Trustee or Warrant
Agent and the fees and disbursements of counsel for any Trustee or Warrant Agent
in connection with any Indenture or Warrant  Agreement and the  Securities,  and
the cost and charges of any transfer  agent or registrar or dividend  disbursing
agent;  and (viii) all other costs and expenses  incident to the  performance of
its obligations  hereunder which are not otherwise  specifically provided for in
this  Section.  It is  understood,  however,  that,  except as  provided in this
Section, Section 8 and Section 11 hereof, the Underwriters will pay all of their
own costs and expenses,  including the fees of their counsel,  transfer taxes on
resale of any of the Securities by them, and any advertising  expenses connected
with any offers they may make.

                  7.  The  obligations  of the  Underwriters  of any  Designated
Securities under the Pricing  Agreement  relating to such Designated  Securities
shall be subject,  in the  discretion of the  Representatives,  to the condition
that all  representations  and warranties and other statements of the Company in
or  incorporated  by  reference  in  the  Pricing  Agreement  relating  to  such
Designated Securities are, at and as of the Time of Delivery for such Designated
Securities,  true and  correct,  the  condition  that  the  Company  shall  have
performed all of its obligations hereunder theretofore to be performed,  and the
following additional conditions:

                  (a) The Prospectus as amended or  supplemented  in relation to
         the  applicable  Designated  Securities  shall have been filed with the
         Commission  pursuant to Rule 424(b) within the  applicable  time period
         prescribed for such filing by the rules and  regulations  under the Act
         and in accordance  with Section 5(a) hereof;  no stop order  suspending
         the  effectiveness  of the  Registration  Statement or any part thereof
         shall have been issued and no  proceeding  for that purpose  shall have
         been  initiated or threatened by the  Commission;  and all requests for
         additional  information on the part of the  Commission  shall have been
         complied with to the Representatives' reasonable satisfaction;

                  (b) Counsel for the  Underwriters  shall have furnished to the
         Representatives  such opinion or  opinions,  dated the Time of Delivery
         for such Designated  Securities,  with respect to the  incorporation of
         the Company, the validity of the Indenture,  the Warrant Agreement, the
         Designated Securities,  the shares of Stock issuable upon conversion of
         the  Convertible  Securities  or upon  exercise  of the  Warrants,  the
         Registration  Statement,  the Prospectus as amended or supplemented and
         other related matters as the  Representatives  may reasonably  request,
         and such counsel  shall have received  such papers and  information  as
         they may reasonably request to enable them to pass upon such matters;

                  (c) (I) Counsel for the Company reasonably satisfactory to the
         Representatives  shall  have  furnished  to the  Representatives  their
         written  opinion,  dated  the  Time of  Delivery  for  such  Designated
         Securities,  in form and substance satisfactory to the Representatives,
         to the effect that:

                      (i) The Company has been duly  incorporated and is validly
                  existing as a corporation  in good standing  under the laws of
                  the  jurisdiction of its  incorporation,  with corporate power
                  and authority to own its  properties  and conduct its business
                  as described in the Prospectus as amended or supplemented;

                     (ii) The Company has an  authorized  capitalization  as set
                  forth in the Prospectus as amended or supplemented, and all of
                  the issued  shares of capital  stock of the Company  have been
                  duly and validly  authorized and issued and are fully paid and
                  non-assessable;  and the  shares of Stock  initially  issuable
                  upon  conversion  or upon  exercise of the Warrants  have been
                  duly and validly  authorized  and reserved  for issuance  and,
                  when issued and delivered in accordance with the provisions of
                  the Securities and the Indenture or the Warrant Agreement,  as
                  the case may be,  will be duly and  validly  issued  and fully
                  paid and  non-assessable,  and will conform to the description
                  of the  Stock  contained  in  the  Prospectus  to  the  extent
                  described therein;

                    (iii)  The  Company  has been  duly  qualified  as a foreign
                  corporation  for the  transaction  of business  and is in good
                  standing under the laws of each other jurisdiction in which it
                  owns or leases properties,  or conducts any business, so as to
                  require  such  qualification,  or is  subject  to no  material
                  liability  or  disability  by reason of the  failure  to be so
                  qualified  in  any  such  jurisdiction   (such  counsel  being
                  entitled to rely in respect of the opinion in this clause upon
                  opinions  of local  counsel or  certificates  of  governmental
                  officials  or agencies  and in respect of matters of fact upon
                  certificates  of officers of the Company,  provided  that such
                  counsel   shall  state  that  they   believe   that  both  the
                  Representatives  and they are  justified  in relying upon such
                  opinions and certificates);

                     (iv) To such  counsel's  knowledge  and  other  than as set
                  forth in the Prospectus as amended or supplemented,  there are
                  no legal or  governmental  proceedings  pending  to which  the
                  Company or any of its  subsidiaries is a party or of which any
                  property  of the  Company  or any of its  subsidiaries  is the
                  subject which,  if determined  adversely to the Company or any
                  of its  subsidiaries,  would  individually or in the aggregate
                  have a material adverse effect on the  consolidated  financial
                  position, stockholders' equity or results of operations of the
                  Company  and  its   subsidiaries;   and,  to  such   counsel's
                  knowledge,  no such proceedings are threatened or contemplated
                  by governmental authorities or threatened by others;

                      (v) This Agreement and the Pricing  Agreement with respect
                  to  the  Designated  Securities  have  been  duly  authorized,
                  executed and delivered by the Company;

                     (vi) The Designated  Securities have been duly  authorized,
                  executed,   authenticated   or,  in  the  case  of   Warrants,
                  countersigned  by the Warrant Agent as provided in the Warrant
                  Agreement,  issued  and  delivered  and  constitute  valid and
                  legally  binding  obligations  of the Company  entitled to the
                  benefits  provided by the Indenture or the Warrant  Agreement,
                  as the  case may be;  and the  Designated  Securities  and the
                  Indenture  or the  Warrant  Agreement,  as the  case  may  be,
                  conform  to the  descriptions  thereof  in the  Prospectus  as
                  amended or supplemented;

                    (vii) The  Indenture or the Warrant  Agreement,  as the case
                  may be, has been duly  authorized,  executed and  delivered by
                  the  parties  thereto  and  constitutes  a valid  and  legally
                  binding  instrument of the Company,  enforceable in accordance
                  with its terms,  subject,  as to  enforcement,  to bankruptcy,
                  insolvency,   reorganization   and  other   laws  of   general
                  applicability  relating to or affecting  creditors' rights and
                  to general equity principles;  and the Indenture has been duly
                  qualified under the Trust Indenture Act;

                   (viii) The issue and sale of the  Designated  Securities  and
                  the  compliance  by the Company with all of the  provisions of
                  the  Designated  Securities,  the  Indenture  or  the  Warrant
                  Agreement,  as the case may be, this Agreement and the Pricing
                  Agreement  with respect to the  Designated  Securities and the
                  consummation   of  the   transactions   herein   and   therein
                  contemplated  will not conflict  with or result in a breach or
                  violation of any of the terms or provisions  of, or constitute
                  a  default  under,  any  indenture  or loan  agreement  or any
                  material mortgage,  deed of trust or sale/leaseback  agreement
                  or  other  material  agreement  or  instrument  known  to such
                  counsel  to which  the  Company  is a party  or by  which  the
                  Company is bound or to which any of the  property or assets of
                  the  Company is subject,  nor will such  action  result in any
                  violation   of   the   provisions   of  the   Certificate   of
                  Incorporation  or By-laws of the Company or any statute or, to
                  such counsel's knowledge after reasonable  investigation,  any
                  order, rule or regulation of any court or governmental  agency
                  or body  having  jurisdiction  over the  Company or any of its
                  subsidiaries or any of their properties;

                     (ix)  To  such   counsel's   knowledge   after   reasonable
                  investigation,  no consent,  approval,  authorization,  order,
                  registration  or  qualification  of or with any such  court or
                  governmental agency or body is required for the issue and sale
                  of  the  Designated  Securities  or  the  consummation  by the
                  Company of the transactions  contemplated by this Agreement or
                  such  Pricing  Agreement  or  the  Indenture  or  the  Warrant
                  Agreement, except such as have been obtained under the Act and
                  the  Trust   Indenture  Act  and  such  consents,   approvals,
                  authorizations,  registrations  or  qualifications  as  may be
                  required under state securities or Blue Sky laws in connection
                  with  the  purchase  and   distribution   of  the   Designated
                  Securities by the Underwriters;

                      (x)  The  documents   incorporated  by  reference  in  the
                  Prospectus  as  amended  or   supplemented   (other  than  the
                  financial  statements  and  related  schedules  and any  other
                  financial or reserves information or data therein, as to which
                  such  counsel  need  express  no  opinion),  when they  became
                  effective or were filed with the  Commission,  as the case may
                  be,  complied  as to form in all  material  respects  with the
                  requirements  of the Act or the Exchange  Act, as  applicable,
                  and the rules and  regulations of the  Commission  thereunder;
                  and they have no reason to believe that any of such  documents
                  (other than the financial statements and related schedules and
                  any other  financial or reserves  information or data therein,
                  as to which such counsel  need express no opinion),  when they
                  became  effective  or  were  so  filed,  as the  case  may be,
                  contained,  in the  case  of a  registration  statement  which
                  became  effective  under  the Act,  an untrue  statement  of a
                  material  fact or omitted to state a material fact required to
                  be stated therein or necessary to make the statements  therein
                  not misleading,  or, in the case of other documents which were
                  filed under the Act or the Exchange  Act with the  Commission,
                  an untrue  statement of a material  fact or omitted to state a
                  material  fact  necessary  in  order  to make  the  statements
                  therein,  in the light of the  circumstances  under which they
                  were made when such documents were so filed,  not  misleading;
                  and

                     (xi)  The  Registration  Statement  and the  Prospectus  as
                  amended  or  supplemented  and  any  further   amendments  and
                  supplements  thereto made by the Company  prior to the Time of
                  Delivery  for  the  Designated   Securities  (other  than  the
                  financial  statements  and  related  schedules  and any  other
                  financial or reserves information or data therein, as to which
                  such counsel need express no opinion) comply as to form in all
                  material  respects  with the  requirements  of the Act and the
                  Trust Indenture Act and the rules and regulations  thereunder;
                  they have no reason to believe that, as of its effective date,
                  the Registration  Statement or any further  amendment  thereto
                  made by the Company prior to the Time of Delivery  (other than
                  the financial  statements and related  schedules and any other
                  financial or reserves information or data therein, as to which
                  such  counsel  need  express no opinion)  contained  an untrue
                  statement  of a  material  fact or omitted to state a material
                  fact  required to be stated  therein or  necessary to make the
                  statements therein not misleading or that, as of its date, the
                  Prospectus as amended or supplemented or any further amendment
                  or supplement thereto made by the Company prior to the Time of
                  Delivery  (other  than the  financial  statements  and related
                  schedules and any other  financial or reserves  information or
                  data  therein,  as to  which  such  counsel  need  express  no
                  opinion)  contained an untrue  statement of a material fact or
                  omitted  to  state a  material  fact  necessary  to  make  the
                  statements  therein,  in light of the  circumstances  in which
                  they were  made,  not  misleading  or that,  as of the Time of
                  Delivery,  either the Registration Statement or the Prospectus
                  as  amended  or  supplemented  or  any  further  amendment  or
                  supplement  thereto  made by the Company  prior to the Time of
                  Delivery  (other  than the  financial  statements  and related
                  schedules and any other  financial or reserves  information or
                  data  therein,  as to  which  such  counsel  need  express  no
                  opinion)  contains an untrue  statement of a material  fact or
                  omits  to  state  a  material  fact   necessary  to  make  the
                  statements  therein,  in light of the  circumstances  in which
                  they were made,  not  misleading;  and they do not know of any
                  amendment to the Registration  Statement  required to be filed
                  or any contracts or other documents of a character required to
                  be  filed  as an  exhibit  to the  Registration  Statement  or
                  required to be  incorporated  by reference into the Prospectus
                  as amended or  supplemented or required to be described in the
                  Registration   Statement  or  the  Prospectus  as  amended  or
                  supplemented  which are not filed or incorporated by reference
                  or described as required;

                     (II) General  Counsel for the Company shall have  furnished
         to the Underwriters such counsel's  written opinion,  dated the Time of
         Delivery, in form and substance satisfactory to the Representatives, to
         the effect that:

                            Insofar  as  information  or data  with  respect  to
                  reserves is set forth in or  incorporated  by reference in the
                  Registration Statement, (A) the Registration Statement and the
                  Prospectus  as  amended  or   supplemented   and  any  further
                  amendments and  supplements  thereto made by the Company prior
                  to the  Time of  Delivery  comply  as to form in all  material
                  respects  with  the  requirements  of the Act  and  the  Trust
                  Indenture Act and the rules and regulations thereunder and (B)
                  such  counsel  has  no  reason  to  believe  that,  as of  its
                  effective  date,  the  Registration  Statement  or any further
                  amendment  thereto  made by the  Company  prior to the Time of
                  Delivery  contained an untrue  statement of a material fact or
                  omitted to state a material fact required to be stated therein
                  or necessary to make the statements  therein not misleading or
                  that,   as  of  its  date,   the   Prospectus  as  amended  or
                  supplemented  or any further  amendment or supplement  thereto
                  made by the Company prior to the Time of Delivery contained an
                  untrue  statement  of a  material  fact or  omitted to state a
                  material fact  necessary to make the  statements  therein,  in
                  light  of the  circumstances  in which  they  were  made,  not
                  misleading,  or that,  as of the Time of Delivery,  either the
                  Registration   Statement  or  the  Prospectus  as  amended  or
                  supplemented  or any further  amendment or supplement  thereto
                  made by the Company prior to the Time of Delivery  contains an
                  untrue  statement  of a  material  fact or  omits  to  state a
                  material fact  necessary to make the  statements  therein,  in
                  light  of the  circumstances  in which  they  were  made,  not
                  misleading;

                  (d) On the date of the Pricing  Agreement for such  Designated
         Securities and at the Time of Delivery for such Designated  Securities,
         the  independent  accountants  of the  Company who have  certified  the
         financial  statements of the Company and its  subsidiaries  included or
         incorporated  by reference  in the  Registration  Statement  shall have
         furnished to the Representatives a letter,  dated the effective date of
         the Registration  Statement or the date of the most recent report filed
         with the Commission containing financial statements and incorporated by
         reference in the Registration  Statement, if the date of such report is
         later  than  such  effective  date,  and a letter  dated  such  Time of
         Delivery, respectively, to the effect set forth in Annex II hereto, and
         with  respect to such letter  dated such Time of  Delivery,  as to such
         other matters as the Representatives may reasonably request and in form
         and substance satisfactory to the Representatives;

                  (e) (i) Neither the Company nor any of its subsidiaries  shall
         have  sustained  since  the  date  of  the  latest  audited   financial
         statements  included or  incorporated by reference in the Prospectus as
         amended or supplemented any loss or interference with its business from
         fire,  explosion,  flood or other  calamity,  whether or not covered by
         insurance,  or from any labor dispute or court or governmental  action,
         order or decree,  otherwise  than as set forth or  contemplated  in the
         Prospectus as amended or  supplemented,  and (ii) since the  respective
         dates as of which  information is given in the Prospectus as amended or
         supplemented  there shall not have been any change in the capital stock
         or  long-term  debt of the  Company or any of its  subsidiaries  or any
         change,  or any  development  involving  a  prospective  change,  in or
         affecting  the  general  affairs,   management,   financial   position,
         stockholders'  equity or results of  operations  of the Company and its
         subsidiaries,  otherwise  than  as set  forth  or  contemplated  in the
         Prospectus as amended or supplemented, the effect of which, in any such
         case  described  in  Clause  (i) or  (ii),  is in the  judgment  of the
         Representatives  so material and adverse as to make it impracticable or
         inadvisable to proceed with the public  offering or the delivery of the
         Designated  Securities on the terms and in the manner  contemplated  in
         the Prospectus as amended or supplemented;

                  (f) On or after the date of the Pricing Agreement  relating to
         the Designated Securities (i) no downgrading shall have occurred in the
         rating  accorded  the  Company's  debt  securities  by any  "nationally
         recognized statistical rating organization," as that term is defined by
         the Commission for purposes of Rule 436(g)(2) under the Act and (ii) no
         such  organization  shall  have  publicly  announced  that it has under
         surveillance or review, with possible negative implications, its rating
         of any of the Company's debt securities;

                  (g) On or after the date of the Pricing Agreement  relating to
         the  Designated  Securities  there shall not have  occurred  any of the
         following:  (i) a  suspension  or  material  limitation  in  trading in
         securities  generally  on the New York Stock  Exchange;  (ii) a general
         moratorium  on  commercial  banking activities  in New York declared by
         either  Federal or New York State  authorities;  (iii) the  outbreak or
         escalation   of   hostilities   involving  the  United  States  or  the
         declaration by the United States of a national emergency or war, if the
         effect of any such event specified in this clause (iii) in the judgment
         of the Representatives makes it impracticable or inadvisable to proceed
         with the public  offering or the delivery of the Designated  Securities
         on the  terms  and in the  manner  contemplated  by the  Prospectus  as
         amended or supplemented; or (iv) the occurrence of any material adverse
         change in the existing  financial,  political or economic conditions in
         the  United  States  or  elsewhere   which,  in  the  judgment  of  the
         Representatives  would  materially  and adversely  affect the financial
         markets  or the  market for the  Designated  Securities  and other debt
         securities; and

                  (h) The Company shall have furnished or caused to be furnished
         to the  Representatives  at the  Time of  Delivery  for the  Designated
         Securities a  certificate  or  certificates  of officers of the Company
         satisfactory  to  the   Representatives  as  to  the  accuracy  of  the
         representations  and warranties of the Company herein at and as of such
         Time of Delivery,  as to the performance by the Company in all material
         respects of all of its  obligations  hereunder  to be  performed  at or
         prior  to  such  Time of  Delivery,  as to the  matters  set  forth  in
         subsections (a) and (e) of this Section and as to such other matters as
         the Representatives may reasonably request.

                  8. (a) The  Company  will  indemnify  and hold  harmless  each
         Underwriter against any losses, claims,  damages or liabilities,  joint
         or several, to which such Underwriter may become subject, under the Act
         or otherwise,  insofar as such losses,  claims,  damages or liabilities
         (or  actions  in  respect  thereof)  arise out of or are based  upon an
         untrue  statement  or  alleged  untrue  statement  of a  material  fact
         contained in any Preliminary  Prospectus,  any  preliminary  prospectus
         supplement,  the Registration  Statement,  the Prospectus as amended or
         supplemented  and any other prospectus  relating to the Securities,  or
         any amendment or supplement  thereto, or arise out of or are based upon
         the  omission  or alleged  omission  to state  therein a material  fact
         required  to be stated  therein  or  necessary  to make the  statements
         therein not  misleading,  and will reimburse each  Underwriter  for any
         legal or other  expenses  reasonably  incurred by such  Underwriter  in
         connection with  investigating or defending any such action or claim as
         such expenses are incurred;  provided,  however, that the Company shall
         not be liable in any such case to the extent that any such loss, claim,
         damage or liability  arises out of or is based upon an untrue statement
         or alleged untrue statement or omission or alleged omission made in any
         Preliminary  Prospectus,  any preliminary  prospectus  supplement,  the
         Registration  Statement,  the Prospectus as amended or supplemented and
         any other prospectus relating to the Securities,  or any such amendment
         or  supplement  in  reliance  upon  and  in  conformity   with  written
         information  furnished to the Company by any  Underwriter of Designated
         Securities  through  the  Representatives  expressly  for  use  in  the
         Prospectus as amended or supplemented relating to such Securities.

                  (b) Each  Underwriter  will  indemnify  and hold  harmless the
         Company against any losses, claims, damages or liabilities to which the
         Company may become subject, under the Act or otherwise, insofar as such
         losses,  claims, damages or liabilities (or actions in respect thereof)
         arise out of or are based upon an untrue  statement  or alleged  untrue
         statement of a material fact contained in any  Preliminary  Prospectus,
         any preliminary prospectus supplement,  the Registration Statement, the
         Prospectus as amended or supplemented and any other prospectus relating
         to the Securities, or any amendment or supplement thereto, or arise out
         of or are based upon the omission or alleged  omission to state therein
         a material fact required to be stated  therein or necessary to make the
         statements therein not misleading, in each case to the extent, but only
         to the extent,  that such untrue  statement or alleged untrue statement
         or omission or alleged omission was made in any Preliminary Prospectus,
         any preliminary prospectus supplement,  the Registration Statement, the
         Prospectus as amended or supplemented and any other prospectus relating
         to the Securities, or any such amendment or supplement in reliance upon
         and in conformity with written information  furnished to the Company by
         such Underwriter through the Representatives expressly for use therein;
         and  will  reimburse  the  Company  for any  legal  or  other  expenses
         reasonably  incurred by the Company in connection with investigating or
         defending any such action or claim as such expenses are incurred.

                  (c)  Promptly  after  receipt by an  indemnified  party  under
         subsection  (a) or (b)  above  of  notice  of the  commencement  of any
         action,  such indemnified party shall, if a claim in respect thereof is
         to be made against the indemnifying party under such subsection, notify
         the indemnifying party in writing of the commencement  thereof; but the
         omission so to notify the indemnifying  party shall not relieve it from
         any liability which it may have to any indemnified party otherwise than
         under such subsection. In case any such action shall be brought against
         any indemnified party and it shall notify the indemnifying party of the
         commencement  thereof,  the  indemnifying  party  shall be  entitled to
         participate therein and, to the extent that it shall wish, jointly with
         any other indemnifying party similarly notified,  to assume the defense
         thereof, with counsel reasonably satisfactory to such indemnified party
         (who shall not,  except with the consent of the  indemnified  party, be
         counsel  to  the  indemnifying  party),  and,  after  notice  from  the
         indemnifying  party to such  indemnified  party of its  election  so to
         assume the defense thereof,  the indemnifying party shall not be liable
         to such indemnified  party under such subsection for any legal expenses
         of other  counsel  or any other  expenses,  in each  case  subsequently
         incurred by such  indemnified  party,  in  connection  with the defense
         thereof other than reasonable costs of investigation.

                  (d) If the  indemnification  provided for in this Section 8 is
         unavailable to or  insufficient  to hold harmless an indemnified  party
         under  subsection  (a) or (b) above in respect of any  losses,  claims,
         damages or  liabilities  (or  actions in respect  thereof)  referred to
         therein,  then each  indemnifying  party shall contribute to the amount
         paid or payable by such  indemnified  party as a result of such losses,
         claims,  damages or liabilities (or actions in respect thereof) in such
         proportion as is appropriate to reflect the relative  benefits received
         by the Company on the one hand and the  Underwriters  of the Designated
         Securities on the other from the offering of the Designated  Securities
         to which such loss,  claim,  damage or liability  (or action in respect
         thereof)  relates.   If,  however,   the  allocation  provided  by  the
         immediately preceding sentence is not permitted by applicable law or if
         the  indemnified  party  failed  to  give  the  notice  required  under
         subsection (c) above, then each indemnifying  party shall contribute to
         such  amount  paid  or  payable  by  such  indemnified  party  in  such
         proportion as is appropriate to reflect not only such relative benefits
         but also the  relative  fault  of the  Company  on the one hand and the
         Underwriters  of the  Designated  Securities on the other in connection
         with the statements or omissions which resulted in such losses, claims,
         damages or liabilities (or actions in respect thereof),  as well as any
         other relevant equitable considerations. The relative benefits received
         by the Company on the one hand and such Underwriters on the other shall
         be deemed to be in the same  proportion  as the total net proceeds from
         such offering (before deducting  expenses) received by the Company bear
         to  the  total  underwriting  discounts  and  commissions  received  by
         such Underwriters.  The relative fault shall be determined by reference
         to, among other things,  whether the untrue or alleged untrue statement
         of a  material  fact or the  omission  or alleged  omission  to state a
         material fact relates to information supplied by the Company on the one
         hand or such  Underwriters  on the  other  and  the  parties'  relative
         intent, knowledge,  access to information and opportunity to correct or
         prevent such  statement or omission.  The Company and the  Underwriters
         agree that it would not be just and equitable if contributions pursuant
         to this subsection (d) were determined by pro rata allocation  (even if
         the Underwriters were treated as one entity for such purpose) or by any
         other method of allocation which does not take account of the equitable
         considerations  referred to above in this  subsection  (d).  The amount
         paid or  payable  by an  indemnified  party as a result of the  losses,
         claims, damages or liabilities (or actions in respect thereof) referred
         to above in this subsection (d) shall be deemed to include any legal or
         other  expenses  reasonably  incurred  by  such  indemnified  party  in
         connection  with  investigating  or defending any such action or claim.
         Notwithstanding  the provisions of this  subsection (d), no Underwriter
         shall be required to  contribute  any amount in excess of the amount by
         which the total  price at which the  applicable  Designated  Securities
         underwritten  by it and  distributed  to the public were offered to the
         public  exceeds the amount of any damages  which such  Underwriter  has
         otherwise  been  required  to pay by reason of such  untrue or  alleged
         untrue statement or omission or alleged  omission.  No person guilty of
         fraudulent  misrepresentation  (within the meaning of Section  11(f) of
         the Act) shall be entitled to contribution  from any person who was not
         guilty of such  fraudulent  misrepresentation.  The  obligations of the
         Underwriters  of  Designated  Securities  in  this  subsection  (d)  to
         contribute are several in proportion to their  respective  underwriting
         obligations with respect to such Securities and not joint.

                  (e) The  obligations of the Company under this Section 8 shall
         be in addition to any liability  which the Company may  otherwise  have
         and shall extend,  upon the same terms and conditions,  to each person,
         if any, who controls any Underwriter within the meaning of the Act; and
         the  obligations of the  Underwriters  under this Section 8 shall be in
         addition  to  any  liability  which  the  respective  Underwriters  may
         otherwise have and shall extend, upon the same terms and conditions, to
         each officer and  director of the Company and to each  person,  if any,
         who controls the Company within the meaning of the Act.

                  9. (a) If any  Underwriter  shall default in its obligation to
         purchase  the  Designated  Securities  which it has agreed to  purchase
         under the Pricing Agreement relating to such Designated Securities, the
         Representatives  may in their  discretion  arrange  for  themselves  or
         another party or other parties to purchase such  Designated  Securities
         on the terms contained  herein.  If within  thirty-six hours after such
         default by any Underwriter the  Representatives  do not arrange for the
         purchase  of such  Designated  Securities,  then the  Company  shall be
         entitled  to a  further  period of  thirty-six  hours  within  which to
         procure   another   party  or  other   parties   satisfactory   to  the
         non-defaulting  Representatives to purchase such Designated  Securities
         on such terms.  In the event  that,  within the  respective  prescribed
         period,  the  Representatives  notify  the  Company  that  they have so
         arranged for the purchase of such Designated Securities, or the Company
         notifies the  Representatives  that it has so arranged for the purchase
         of such Designated Securities, the Representatives or the Company shall
         have the right to  postpone  the Time of Delivery  for such  Designated
         Securities for a period of not more than seven days, in order to effect
         whatever  changes may  thereby be made  necessary  in the  Registration
         Statement or the Prospectus as amended or supplemented, or in any other
         documents or arrangements,  and the Company agrees to file promptly any
         amendments  or  supplements  to  the  Registration   Statement  or  the
         Prospectus which in the opinion of the  Representatives  may thereby be
         made necessary.  The term "Underwriter" as used in this Agreement shall
         include any person  substituted  under this Section with like effect as
         if such person had  originally  been a party to the  Pricing  Agreement
         with respect to such Designated Securities.

                  (b)  If,  after  giving  effect  to any  arrangements  for the
         purchase of the  Designated  Securities of a defaulting  Underwriter or
         Underwriters  by the  Representatives  and the  Company as  provided in
         subsection (a) above, the aggregate principal amount of such Designated
         Securities which remains  unpurchased  does not exceed  one-eleventh of
         the aggregate principal amount of the Designated  Securities,  then the
         Company shall have the right to require each non-defaulting Underwriter
         to purchase the principal  amount of Designated  Securities  which such
         Underwriter  agreed to purchase under the Pricing Agreement relating to
         such  Designated   Securities   and,  in  addition,   to  require  each
         non-defaulting Underwriter to purchase its pro rata share (based on the
         principal amount of Designated Securities which such Underwriter agreed
         to purchase under such Pricing Agreement) of the Designated  Securities
         of  such  defaulting   Underwriter  or  Underwriters   for  which  such
         arrangements  have not been made;  but nothing  herein shall  relieve a
         defaulting Underwriter from liability for its default.

                  (c)  If,  after  giving  effect  to any  arrangements  for the
         purchase of the  Designated  Securities of a defaulting  Underwriter or
         Underwriters  by the  Representatives  and the  Company as  provided in
         subsection  (a) above,  the  aggregate  principal  amount of Designated
         Securities  which  remains  unpurchased  exceeds  one-eleventh  of  the
         aggregate principal amount of the Designated Securities, as referred to
         in subsection (b) above, or if the Company shall not exercise the right
         described   in   subsection   (b)  above  to   require   non-defaulting
         Underwriters  to  purchase   Designated   Securities  of  a  defaulting
         Underwriter or  Underwriters,  then the Pricing  Agreement  relating to
         such Designated Securities shall thereupon terminate, without liability
         on the part of any  non-defaulting  Underwriter or the Company,  except
         for the  expenses to be borne by the Company  and the  Underwriters  as
         provided  in  Section  6  hereof  and the  indemnity  and  contribution
         agreements  in Section 8 hereof;  but nothing  herein  shall  relieve a
         defaulting Underwriter from liability for its default.

                  10. The respective indemnities,  agreements,  representations,
warranties and other statements of the Company and the several Underwriters,  as
set  forth in this  Agreement  or made by or on  behalf  of them,  respectively,
pursuant to this Agreement, shall remain in full force and effect, regardless of
any  investigation  (or any  statement as to the results  thereof) made by or on
behalf of any Underwriter or any controlling  person of any Underwriter,  or the
Company,  or any officer or director or controlling  person of the Company,  and
shall survive delivery of and payment for the Securities.

                  11. If any Pricing  Agreement shall be terminated  pursuant to
Section 9 hereof,  the  Company  shall  not then be under any  liability  to any
Underwriter  with respect to the Designated  Securities  covered by such Pricing
Agreement except as provided in Section 6 and Section 8 hereof;  but, if for any
other  reason  Designated  Securities  are not  delivered by or on behalf of the
Company as provided herein, the Company will reimburse the Underwriters  through
the  Representatives  for all out-of-pocket  expenses approved in writing by the
Representatives,   including  fees  and  disbursements  of  counsel,  reasonably
incurred by the Underwriters in making  preparations for the purchase,  sale and
delivery of such Designated  Securities,  but the Company shall then be under no
further liability to any Underwriter with respect to such Designated  Securities
except as provided in Section 6 and Section 8 hereof.

                  12. In all  dealings  hereunder,  the  Representatives  of the
Underwriters  of  Designated  Securities  shall  act on  behalf  of each of such
Underwriters,  and the parties hereto shall be entitled to act and rely upon any
statement,  request,  notice or agreement on behalf of any  Underwriter  made or
given by such Representatives jointly or by such of the Representatives, if any,
as may be designated for such purpose in the Pricing Agreement.

                  All  statements,  requests,  notices and agreements  hereunder
shall be in writing,  and if to the  Underwriters  shall be delivered or sent by
mail, telex or facsimile  transmission to the address of the  Representatives as
set forth in the Pricing Agreement;  and if to the Company shall be delivered or
sent by mail, telex or facsimile  transmission to the address of the Company set
forth in the Registration Statement,  Attention:  Secretary;  provided, however,
that any notice to an  Underwriter  pursuant  to Section  8(c)  hereof  shall be
delivered or sent by mail,  telex or facsimile  transmission to such Underwriter
at  its  address  set  forth  in  its  Underwriters'  Questionnaire,   or  telex
constituting such  Questionnaire,  which address will be supplied to the Company
by the Representatives upon request. Any such statements,  requests,  notices or
agreements shall take effect upon receipt thereof.

                  13. This Agreement and each Pricing Agreement shall be binding
upon, and inure solely to the benefit of, the Underwriters,  the Company and, to
the extent  provided  in  Section 8 and  Section 10  hereof,  the  officers  and
directors  of the  Company  and each  person  who  controls  the  Company or any
Underwriter, and their respective heirs, executors,  administrators,  successors
and assigns,  and no other  person  shall  acquire or have any right under or by
virtue of this Agreement or any such Pricing  Agreement.  No purchaser of any of
the  Securities  from any  Underwriter  shall be deemed a successor or assign by
reason merely of such purchase.

                  14. Time shall be of the essence of each Pricing Agreement. As
used herein,  "business day" shall mean any day when the Commission's  office in
Washington, D.C. is open for business.

                  15.  This  Agreement  and  each  Pricing  Agreement  shall  be
governed by and construed in accordance with the laws of the State of New York.

                  16. This Agreement and each Pricing  Agreement may be executed
by any  one  or  more  of the  parties  hereto  and  thereto  in any  number  of
counterparts,  each of which  shall be  deemed to be an  original,  but all such
respective counterparts shall together constitute one and the same instrument.

                  If the  foregoing is in  accordance  with your  understanding,
please sign and return to us five counterparts  hereof,  and upon the acceptance
hereof  by the  Underwriters,  this  letter  and such  acceptance  hereof  shall
constitute a binding agreement between each of the Underwriters and the Company.

                                         Very truly yours,

                                         Magma Copper Company

                                         By:
                                            ----------------------------------
                                            Name:
                                            Title:

Accepted as of the date hereof:

Goldman, Sachs & Co.


--------------------------------
       (Goldman, Sachs & Co.)


Merrill Lynch, Pierce, Fenner
  & Smith Incorporated


By:
    -----------------------------
     Name:
     Title:

                                                                        ANNEX I






                               Pricing Agreement



[Name(s) of Representative(s)]
[Name(s) of Co-Representative(s)]
As Representatives of the several
Underwriters named in Schedule I hereto,
c/o [Name and Address
      of Representatives]





                                                                ........., 19..



Dear Sirs:

                  Magma Copper Company, a Delaware  corporation (the "Company"),
proposes,  subject  to  the  terms  and  conditions  stated  herein  and  in the
Underwriting  Agreement,  dated  May 18,  1995 (the  "Underwriting  Agreement"),
between the Company on the one hand and Goldman,  Sachs & Co. and Merrill Lynch,
Pierce,  Fenner & Smith Incorporated on the other hand, to issue and sell to the
Underwriters  named in Schedule I hereto  (the  "Underwriters")  the  Securities
specified  in  Schedule  II hereto (the  "Designated  Securities").  Each of the
provisions of the Underwriting  Agreement is incorporated herein by reference in
its  entirety,  and shall be deemed to be a part of this  Agreement  to the same
extent as if such provisions had been set forth in full herein;  and each of the
representations  and  warranties  set forth therein shall be deemed to have been
made  at and as of  the  date  of  this  Pricing  Agreement,  except  that  each
representation  and warranty  which refers to the Prospectus in Section 2 of the
Underwriting  Agreement shall be deemed to be a representation or warranty as of
the date of the Underwriting Agreement in relation to the Prospectus (as therein
defined),  and also a representation and warranty as of the date of this Pricing
Agreement in relation to the Prospectus as amended or  supplemented  relating to
the Designated Securities which are the subject of this Pricing Agreement.  Each
reference  to  the   Representatives   herein  and  in  the  provisions  of  the
Underwriting  Agreement so incorporated by reference shall be deemed to refer to
you.  Unless  otherwise  defined  herein,  terms  defined  in  the  Underwriting
Agreement are used herein as therein defined. The Representatives  designated to
act on behalf of the  Representatives  and on behalf of each of the Underwriters
of  the  Designated  Securities  pursuant  to  Section  12 of  the  Underwriting
Agreement and the address of the Representatives  referred to in such Section 12
are set forth at the end of Schedule II hereto.

                  An amendment to the Registration Statement, or a supplement to
the Prospectus,  as the case may be, relating to the Designated  Securities,  in
the form  heretofore  delivered  to you is now  proposed  to be  filed  with the
Commission.

                  Subject to the terms and  conditions  set forth  herein and in
the Underwriting Agreement incorporated herein by reference,  the Company agrees
to issue  and  sell to each of the  Underwriters,  and each of the  Underwriters
agrees, severally and not jointly, to purchase from the Company, at the time and
place and at the  purchase  price to the  Underwriters  set forth in Schedule II
hereto,  the principal  amount of Designated  Securities  set forth opposite the
name of such Underwriter in Schedule I hereto.

                  If the  foregoing is in  accordance  with your  understanding,
please  sign  and  return  to us  [one  for  the  Issuer  and  for  each  of the
Representatives  plus  one for  each  counsel]  counterparts  hereof,  and  upon
acceptance hereof by you, on behalf of each of the Underwriters, this letter and
such acceptance hereof,  including the provisions of the Underwriting  Agreement
incorporated  herein by reference,  shall constitute a binding agreement between
each of the Underwriters and the Company.  It is understood that your acceptance
of this letter on behalf of each of the  Underwriters  is or will be pursuant to
the authority set forth in a form of Agreement among  Underwriters,  the form of
which shall be  submitted  to the  Company for  examination  upon  request,  but
without warranty on the part of the  Representatives  as to the authority of the
signers thereof.

                                               Very truly yours,

                                               Magma Copper Company


                                               By:
                                                  -----------------------------
                                                  Name:
                                                  Title:



Accepted as of the date hereof:

[Name(s) of Representative(s)]
[Name(s) of Co-Representative(s)]


By:
    -----------------------------
    [Name(s) of Representative(s)]


[Name(s) of Co-Representative(s)]


By:
   -----------------------------



         On behalf of each of the Underwriters



                                   SCHEDULE I


                                                                    Principal
                                                                    Amount of
                                                                    Designated
                                                                    Securities
                                                                      to be
                                     Underwriters                   Purchased 
                                    ---------------               -------------

              

[Name(s) of Representative(s)] ................................   $
[Name(s) of Co-Representative(s)]
[Names of other Underwriters]







                                                                  -------------
Total .........................................................   $
                                                                  =============




                                               SCHEDULE II


Title of Designated Securities:

    [   %][Floating Rate] [Zero Coupon] [Convertible] [Senior Subordinated]
    [Subordinated] [Notes] [Debentures] due

Aggregate principal amount:

    [$]

Price to Public:

    __% of the principal amount of the Designated
    Securities, plus accrued interest from            
    to     [and accrued amortization, if any, from
             to                    ]

Purchase Price by Underwriters:

    __% of the principal amount of the Designated
    Securities, plus accrued interest from            
    to     [and accrued amortization, if any, from
             to                ]

Specified funds for payment of purchase price:

    [New York] Clearing House funds

Indenture:

    Indenture, dated            , 19  , between the Company
    and                      , as Trustee

Warrant Agreement:

   Warrant Agreement, dated        , 19  , between the Company
   and                      , as Warrant Agent

Maturity:


Interest Rate:

    [   %] [Zero Coupon] [See Floating Rate Provisions]

Interest Payment Dates:

    [months and dates]

Redemption Provisions:

    [No provisions for redemption]

    [The  Designated  Securities  may be  redeemed,  otherwise  than through the
    sinking  fund,  in whole or in part at the  option  of the  Company,  in the
    amount of [$]           or an integral multiple thereof,

    [on or after              ,      at the following redemption prices 
    (expressed in percentages of principal amount).  If [redeemed on or before 
           ,    %, and if] redeemed during the 12-month period beginning 
                ,

                                                           Redemption
                        Year                                 Price
                        ----                               ----------


    and thereafter at 100% of their principal amount, together in each case with
    accrued interest to the redemption date.]

    [on any interest payment date falling in or after , , at the election of the
    Company,  at a redemption price equal to the principal amount thereof,  plus
    accrued interest to the date of redemption.]

    [Other possible  redemption  provisions,  such as mandatory  redemption upon
    occurrence of certain events or redemption for changes in tax law]

    [Restriction on refunding]

Sinking Fund Provisions:

    [No sinking fund provisions]

    [The Designated  Securities are entitled to the benefit of a sinking fund to
    retire [$] principal amount of Designated Securities on in each of the years
    through at 100% of their principal  amount plus accrued  interest][,together
    with [cumulative]  [noncumulative]  redemptions at the option of the Company
    to retire an additional [$]
    principal amount of Designated Securities in the years  
        through      at 100% of their principal amount plus accrued interest].

    [If Securities are extendable debt Securities, insert--

Extendable provisions:

    Securities are repayable on , [insert date and years],  at the option of the
    holder,  at their  principal  amount with accrued  interest.  Initial annual
    interest  rate  will be %,  and  thereafter  annual  interest  rate  will be
    adjusted on , and to a rate not less than % of the effective annual interest
    rate on U.S.  Treasury  obligations  with -year maturities as of the [insert
    date 15 days prior to maturity date] prior to such [insert maturity date].]


    [If Securities are Floating Rate debt Securities, insert--

Floating rate provisions:

    Initial  annual  interest  rate will be %  through  and  thereafter  will be
    adjusted [monthly] [on each , , ________________ and ] [to an annual rate of
    % above the average rate for -year  [month]  [securities]  [certificates  of
    deposit]  issued by and [insert names of banks].]  [and the annual  interest
    rate  [thereafter]  [from through ] will be the interest yield equivalent of
    the weekly average per annum market  discount rate for -month Treasury bills
    plus % of Interest  Differential  (the  excess,  if any, of (i) then current
    weekly average per annum secondary market yield for
        -month  certificates  of deposit over (ii) then current  interest  yield
    equivalent of the weekly  average per annum market  discount rate for -month
    Treasury  bills);  [from and  thereafter  the rate will be the then  current
    interest yield equivalent plus % of Interest Differential].]


Conversion or Exchange Provisions:




Defeasance provisions:




Time of Delivery:




Closing Location:





Names and addresses of Representatives:

    Designated Representatives:

    Address for Notices, etc.:

[Other Terms]*:
--------
*   A description of particular tax,  accounting or other unusual features (such
    as the addition of event risk  provisions) of the  Securities  should be set
    forth,  or  referenced  to an  attached  and  accompanying  description,  if
    necessary  to  ensure  agreement  as to the  terms of the  Securities  to be
    purchased and sold. Such a description might appropriately be in the form in
    which such features will be described in the  Prospectus  Supplement for the
    offering.

 

                                                                       ANNEX II






                  Pursuant to Section 7(d) of the  Underwriting  Agreement,  the
accountants shall furnish letters to the Underwriters to the effect that:

                 (i) They are  independent  certified  public  accountants  with
         respect to the Company and its  subsidiaries  within the meaning of the
         Act and the applicable published rules and regulations thereunder;

                (ii)  In  their  opinion,   the  financial  statements  and  any
         supplementary  financial information and schedules (and, if applicable,
         prospective   financial   statements   and/or   pro   forma   financial
         information) examined by them and included or incorporated by reference
         in the  Registration  Statement or the Prospectus  comply as to form in
         all material  respects with the applicable  accounting  requirements of
         the Act or the Exchange Act, as applicable,  and the related  published
         rules and regulations thereunder;  and, if applicable, they have made a
         review  in  accordance  with  standards  established  by  the  American
         Institute of Certified Public  Accountants of the consolidated  interim
         financial  statements,  selected  financial  data, pro forma  financial
         information,   prospective   financial   statements   and/or  condensed
         financial  statements derived from audited financial  statements of the
         Company for the periods specified in such letter, as indicated in their
         reports   thereon,   copies  of  which  have  been   furnished  to  the
         representatives of the Underwriters (the "Representatives");

               (iii) The unaudited selected  financial  information with respect
         to the consolidated results of operations and financial position of the
         Company  for  the  five  most  recent  fiscal  years  included  in  the
         Prospectus and included or  incorporated  by reference in item 6 of the
         Company's  Annual  Report on Form 10-K for the most recent  fiscal year
         agrees  with  the  corresponding   amounts  (after   restatement  where
         applicable) in the audited  consolidated  financial statements for such
         five fiscal years which were included or  incorporated  by reference in
         the Company's Annual Reports on Form 10-K for such fiscal years;

                (iv) On the basis of limited  procedures,  not  constituting  an
         audit  in  accordance  with  generally  accepted  auditing   standards,
         consisting of a reading of the unaudited financial statements and other
         information  referred  to below,  a  reading  of the  latest  available
         interim  financial  statements  of the  Company  and its  subsidiaries,
         inspection  of the minute  books of the  Company  and its  subsidiaries
         since the date of the latest audited financial  statements  included or
         incorporated by reference in the Prospectus,  inquiries of officials of
         the  Company  and  its  subsidiaries   responsible  for  financial  and
         accounting  matters and such other  inquiries and  procedures as may be
         specified in such letter,  nothing came to their  attention that caused
         them to believe that:

                      (A)  the  unaudited  consolidated  statements  of  income,
                  consolidated  balance  sheets and  consolidated  statements of
                  cash  flows  included  or  incorporated  by  reference  in the
                  Company's  Quarterly  Reports  on Form  10-Q  incorporated  by
                  reference  in the  Prospectus  do not comply as to form in all
                  material respects with the applicable accounting  requirements
                  of the Exchange Act as it applies to Form 10-Q and the related
                  published  rules  and  regulations  thereunder  or are  not in
                  conformity  with  generally  accepted  accounting   principles
                  applied on a basis substantially consistent with the basis for
                  the audited  consolidated  statements of income,  consolidated
                  balance  sheets  and  consolidated  statements  of cash  flows
                  included or incorporated by reference in the Company's  Annual
                  Report on Form 10-K for the most recent fiscal year;

                      (B) any other unaudited  income statement data and balance
                  sheet items  included in the  Prospectus do not agree with the
                  corresponding  items in the unaudited  consolidated  financial
                  statements  from which such data and items were  derived,  and
                  any such  unaudited  data and items were not  determined  on a
                  basis   substantially   consistent  with  the  basis  for  the
                  corresponding  amounts in the audited  consolidated  financial
                  statements  included  or  incorporated  by  reference  in  the
                  Company's  Annual  Report  on Form  10-K for the  most  recent
                  fiscal year;

                      (C) the  unaudited  financial  statements  which  were not
                  included  in the  Prospectus  but from which were  derived the
                  unaudited condensed financial statements referred to in Clause
                  (A) and any unaudited  income statement data and balance sheet
                  items included in the Prospectus and referred to in Clause (B)
                  were not determined on a basis  substantially  consistent with
                  the basis for the  audited  financial  statements  included or
                  incorporated  by reference in the  Company's  Annual Report on
                  Form 10-K for the most recent fiscal year;

                      (D)  any  unaudited  pro  forma   consolidated   condensed
                  financial  statements included or incorporated by reference in
                  the  Prospectus  do not  comply  as to  form  in all  material
                  respects with the applicable  accounting  requirements  of the
                  Act and the published rules and regulations  thereunder or the
                  pro forma  adjustments  have not been properly  applied to the
                  historical amounts in the compilation of those statements;

                      (E) as of a  specified  date not more than five days prior
                  to the date of such letter, there have been any changes in the
                  consolidated  capital  stock (other than  issuances of capital
                  stock  upon   exercise   of   options,   warrants   and  stock
                  appreciation  rights, upon earn-outs of performance shares and
                  upon conversions of convertible securities, in each case which
                  were  outstanding  on the  date of the  latest  balance  sheet
                  included or  incorporated  by reference in the  Prospectus) or
                  any increase in the consolidated long-term debt of the Company
                  and its  subsidiaries,  or any decreases in  consolidated  net
                  current  assets or net assets or other items  specified by the
                  Representatives,  or any  increases in any items  specified by
                  the  Representatives,  in each case as compared  with  amounts
                  shown in the latest balance sheet included or  incorporated by
                  reference in the Prospectus,  except in each case for changes,
                  increases or decreases  which the  Prospectus  discloses  have
                  occurred or may occur or which are  described  in such letter;
                  and

                      (F) for the period  from the date of the latest  financial
                  statements  included  or  incorporated  by  reference  in  the
                  Prospectus  to the  specified  date  referred to in Clause (E)
                  there were any  decreases  in  consolidated  net  revenues  or
                  operating  profit  or  the  total  or  per  share  amounts  of
                  consolidated  net  income  or  other  items  specified  by the
                  Representatives,  or any  increases in any items  specified by
                  the  Representatives,  in  each  case  as  compared  with  the
                  comparable  period  of the  preceding  year and with any other
                  period   of    corresponding    length    specified   by   the
                  Representatives,   except  in  each  case  for   increases  or
                  decreases which the Prospectus  discloses have occurred or may
                  occur or which are described in such letter; and

                  (v) In  addition to the audit  referred to in their  report(s)
         included or incorporated by reference in the Prospectus and the limited
         procedures,  inspection of minute books, inquiries and other procedures
         referred to in paragraphs  (iii) and (iv) above,  they have carried out
         certain specified  procedures,  not constituting an audit in accordance
         with generally  accepted  auditing  standards,  with respect to certain
         amounts,   percentages  and  financial  information  specified  by  the
         Representatives,  which are derived from the general accounting records
         of the Company and its  subsidiaries,  which  appear in the  Prospectus
         (excluding documents  incorporated by reference),  or in Part II of, or
         in exhibits and schedules to, the Registration  Statement  specified by
         the  Representatives  or in documents  incorporated by reference in the
         Prospectus specified by the Representatives,  and have compared certain
         of  such  amounts,  percentages  and  financial  information  with  the
         accounting  records of the Company and its  subsidiaries and have found
         them to be in agreement.

                  All  reference  in this  Annex II to the  Prospectus  shall be
deemed to refer to the  Prospectus  (including  the  documents  incorporated  by
reference  therein) as defined in the  Underwriting  Agreement as of the date of
the letter  delivered on the date of the Pricing  Agreement for purposes of such
letter and to the Prospectus as amended or supplemented (including the documents
incorporated  therein) in relation to the applicable  Designated  Securities for
purposes of the letter  delivered  at the Time of  Delivery  of such  Designated
Securities.



                           

                             Pricing Agreement



Goldman, Sachs & Co.
Merrill Lynch, Pierce, Fenner
  & Smith Incorporated As  Representatives of the several  Underwriters named in
Schedule I hereto, c/o Goldman, Sachs & Co.
      85 Broad Street
      New York, New York  10004



                                                                    May 18, 1995



Dear Sirs:

                  Magma Copper Company, a Delaware  corporation (the "Company"),
proposes,  subject  to  the  terms  and  conditions  stated  herein  and  in the
Underwriting  Agreement,  dated  May 18,  1995 (the  "Underwriting  Agreement"),
between the Company on the one hand and Goldman,  Sachs & Co. and Merrill Lynch,
Pierce,  Fenner & Smith Incorporated on the other hand, to issue and sell to the
Underwriters  named in Schedule I hereto  (the  "Underwriters")  the  Securities
specified  in  Schedule  II hereto (the  "Designated  Securities").  Each of the
provisions of the Underwriting  Agreement is incorporated herein by reference in
its  entirety,  and shall be deemed to be a part of this  Agreement  to the same
extent as if such provisions had been set forth in full herein;  and each of the
representations  and  warranties  set forth therein shall be deemed to have been
made  at and as of  the  date  of  this  Pricing  Agreement,  except  that  each
representation  and warranty  which refers to the Prospectus in Section 2 of the
Underwriting  Agreement shall be deemed to be a representation or warranty as of
the date of the Underwriting Agreement in relation to the Prospectus (as therein
defined),  and also a representation and warranty as of the date of this Pricing
Agreement in relation to the Prospectus as amended or  supplemented  relating to
the Designated Securities which are the subject of this Pricing Agreement.  Each
reference  to  the   Representatives   herein  and  in  the  provisions  of  the
Underwriting  Agreement so incorporated by reference shall be deemed to refer to
you.  Unless  otherwise  defined  herein,  terms  defined  in  the  Underwriting
Agreement are used herein as therein defined. The Representatives  designated to
act on behalf of the  Representatives  and on behalf of each of the Underwriters
of  the  Designated  Securities  pursuant  to  Section  12 of  the  Underwriting
Agreement and the address of the Representatives  referred to in such Section 12
are set forth at the end of Schedule II hereto.

                  An amendment to the Registration Statement, or a supplement to
the Prospectus,  as the case may be, relating to the Designated  Securities,  in
the form  heretofore  delivered  to you is now  proposed  to be  filed  with the
Commission.

                  Subject to the terms and  conditions  set forth  herein and in
the Underwriting Agreement incorporated herein by reference,  the Company agrees
to issue  and  sell to each of the  Underwriters,  and each of the  Underwriters
agrees, severally and not jointly, to purchase from the Company, at the time and
place and at the  purchase  price to the  Underwriters  set forth in Schedule II
hereto,  the principal  amount of Designated  Securities  set forth opposite the
name of such Underwriter in Schedule I hereto.

                  If the  foregoing is in  accordance  with your  understanding,
please  sign and  return to us five  counterparts  hereof,  and upon  acceptance
hereof by you,  on  behalf of each of the  Underwriters,  this  letter  and such
acceptance  hereof,  including  the  provisions  of the  Underwriting  Agreement
incorporated  herein by reference,  shall constitute a binding agreement between
each of the Underwriters and the Company.  It is understood that your acceptance
of this letter on behalf of each of the  Underwriters  is or will be pursuant to
the authority set forth in a form of Agreement among  Underwriters,  the form of
which shall be  submitted  to the  Company for  examination  upon  request,  but
without warranty on the part of the  Representatives  as to the authority of the
signers thereof.

                                                   Very truly yours,

                                                   Magma Copper Company


                                                   By:
                                                      -------------------------
                                                       Name:
                                                       Title:



Accepted as of the date hereof:

Goldman, Sachs & Co.


-------------------------------
     (Goldman, Sachs & Co.)


Merrill Lynch, Pierce, Fenner
  & Smith Incorporated


By:
   -----------------------------
     Name:
     Title:



                                   SCHEDULE I


                                                                   Principal
                                                                   Amount of
                                                                   Designated
                                                                   Securities
                                                                     to be
                        Underwriters                               Purchased
                        ------------                               ----------

Goldman, Sachs & Co........................................      $ 130,000,000
Merrill Lynch, Pierce, Fenner & Smith Incorporated.........         70,000,000

                                                                 -------------
                  Total....................................      $ 200,000,000
                                                                 =============



                                  SCHEDULE II


Title of Designated Securities:

    8.70% Senior Subordinated Notes due May 15, 2005

Aggregate principal amount:

    $200,000,000

Price to Public:

    99.732% of the principal amount of the Designated
    Securities, plus accrued interest from May 15, 1995

Purchase Price by Underwriters:

    98.232% of the principal amount of the Designated
    Securities, plus accrued interest from May 15, 1995

Specified funds for payment of purchase price:

    Same day funds

Indenture:

    Indenture, dated May 15, 1995, between the Company
    and State Street Bank and Trust Company, as Trustee

Maturity:

    May 15, 2005

Interest Rate:

    8.70%

Interest Payment Dates:

    May 15 and November 15

Redemption Provisions:

    No provisions for redemption

Sinking Fund Provisions:

    No sinking fund provisions

Conversion or Exchange Provisions:

    No provisions for conversion or exchange

Defeasance provisions:

    As described in the Prospectus Supplement

Time of Delivery:

      6:30 A.M., Arizona time


Closing Location:

         Magma Copper Company
         7400 North Oracle Road
         Tucson, Arizona  85704



Names and addresses of Representatives:

    Designated Representatives:

         Goldman, Sachs & Co.
         Merrill Lynch, Pierce, Fenner
            & Smith Incorporated

    Address for Notices, etc.:

         Goldman, Sachs & Co.
         85 Broad Street
         New York, New York  10004





                              FIXED CHARGE RATIOS

WITH PREFERRED DIVIDENDS
                                          Year          3 Mos          3 mos
                                          1994            '94            '95
Fixed Charges: 
  Interest Charges:
    Expensed ......................     24,598          5,861          5,233
    Capitalized ...................     17,714          4,755          5,804
                                      --------       --------       --------
  Total Interest Charges ..........     42,312         10,616         11,037

Ammortization of Debt Expense .....        446            105            127
Write-off of Loan Costs ...........       --             --             --
Rental Expense Considered Interest       1,906            469            496
Preferred Stock Dividends of
    Subsidiaries ..................     14,530          3,981          3,875
Guarantees of Other Debt ..........       --             --             --
  Total Fixed Charges(A) ..........     59,194         15,171         15,535

Fixed Charges Added to Income:
  Fixed Charges ...................     59,194         15,171         15,535
  Write-off of Loan Costs .........       --             --             --
  Capitalized Interest Amortization        796            175            226

  Less: Preferred Stock Dividends .    (14,530)        (3,981)        (3,875)
          Capitalized Interest ....    (17,714)        (4,755)        (5,804)
                                      --------       --------       --------
    Total Fixed Charges Added
      to Income ...................     27,746          6,610          6,082

Pre-tax Income (Loss) .............    109,760         10,427         68,611
Earnings(B) .......................    137,506         17,037         74,693
Ratio of Earnings to Fixed
      Charges(B)/(A) ..............        2.3            1.1            4.8

Earnings Deficiency ...............       --             --             --

Supporting Calculations:
  Interest Charges
    Expensed ......................     25,044          5,966          5,360
    Amortization of Debt Expense ..       (446)          (105)          (127)
    Total Expensed Interest Charges     24,598          5,861          5,233

Preferred Dividends Calculation

Effective Rate, 10-K or Calculated          20%            27%            25%

Preferred Stock Dividends .........     11,624          2,906          2,906

Preferred Stock Adjusted for Taxes      14,530          3,981          3,875


<PAGE>

                                                 Year        3 Mos        3 mos
                                                 1994          '94          '95
Fixed Charges: 
  Interest Charges:
    Expensed ............................      24,598        5,861        5,233
    Capitalized .........................      17,714        4,755        5,804
  Total Interest Charges ................      42,312       10,616       11,037

Ammortization of Debt Expense ...........         446          105          127
Write-off of Loan Costs .................        --           --           --
Rental Expense Considered Interest ......       1,906          469          496
Preferred Stock Dividends of
    Subsidiaries ........................        --           --           --
Guarantees of other Debt ................        --           --           --
  Total Fixed Charges(A) ................      44,664       11,190       11,660

Fixed Charges Added to Income:
  Fixed Charges .........................      44,664       11,190       11,660
  Write-off of Loan Costs ...............        --           --           --
  Capitalized Interest Amortization .....         796          175          226

  Less Capitalized Interest .............     (17,714)      (4,755)      (5,804)
    Total Fixed Charges Added
      to Income .........................      27,746        6,610        6,082

Pre-tax Income (excluding
      $14 million SFAS 106) .............     109,760       10,427       68,611
Earnings(B) .............................     137,506       17,037       74,693
Ratio of Earnings to Fixed
      Charges(B)/(A) ....................         3.1          1.5          6.4

Earnings Deficiency .....................        --           --           --

Supporting Calculations:
  Interest Charges
    Expensed ............................      25,044        5,966        5,360
    Amortization of Debt Expense ........        (446)        (105)        (127)
    Total Expensed Interest Charges .....      24,598        5,861        5,233



May 12, 1995






To Magma Copper Company:

We are aware that Magma  Copper  Company  will  incorporate  by reference in its
Prospectus  Supplement for $200,000,000 in Senior  Subordinated Notes related to
Registration  Statement File No. 33-53021,  to be filed on or about May 15, 1995
its Form 10-Q for the quarter  ended March 31, 1995,  which  includes our report
dated  April 14, 1995  covering  the  unaudited  interim  financial  information
contained therein.  Pursuant to Regulation C of the Securities Act of 1933, (the
Act) that report is not considered a part of the Prospectus  Supplement prepared
or  certified  by our firm or a report  prepared or certified by our firm within
the meaning of Sections 7 and 11 of the Act.

Very truly yours,

ARTHUR ANDERSEN LLP





                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


As independent  public  accountants,  we hereby consent to the  incorporation by
reference in the Prospectus  Supplement for $200,000,000 in Senior  Subordinated
Notes  related to  Registration  Statement  File No.  33-53021  for Magma Copper
Company, of our report dated January 27, 1995 included in Magma Copper Company's
Form 10-K for the year ended  December 31, 1994,  and to all  references  to our
firm incorporated by reference in this registration statement.


ARTHUR ANDERSEN LLP

Tucson, Arizona,
May 12, 1995.







                                                           Draft of May 17, 1995










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

                              MAGMA COPPER COMPANY

                                       TO

                      STATE STREET BANK AND TRUST COMPANY,
                                              Trustee



                                   ----------


                                   INDENTURE

                            Dated as of May 15, 1995


                                   ----------



                         Senior Subordinated Securities


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


<PAGE>


                              Magma Copper Company
                 Certain Sections of this Indenture relating to
                    Sections 310 through 318, inclusive, of
                        the Trust Indenture Act of 1939:

Trust Indenture
  Act Section                                                 Indenture Section

ss.310(a)(1) ...........   ...............................................   609
         (a)(2) ........   ...............................................   609
         (a)(3) ........   ....................................   Not Applicable
         (a)(4) ........   ....................................   Not Applicable
         (b) ...........   ...............................................   608
                                                                             610
ss.311(a) ..............   ...............................................   613
         (b) ...........   ...............................................   613
ss.312(a) ..............   ...............................................   701
                                                                             702
         (b) ...........   ...............................................   702
         (c) ...........   ...............................................   702
ss.313(a) ..............   ...............................................   703
         (b) ...........   ...............................................   703
         (c) ...........   ...............................................   703
         (d) ...........   ...............................................   703
ss.314(a) ..............   ...............................................   704
         (a)(4) ........   ...............................................   101
                                                                            1004
         (b) ...........   ....................................   Not Applicable
         (c)(1) ........   ...............................................   102
         (c)(2) ........   ...............................................   102
         (c)(3) ........   ....................................   Not Applicable
         (d) ...........   ....................................   Not Applicable
         (e) ...........   ...............................................   102
ss.315(a) ..............   ...............................................   601
         (b) ...........   ...............................................   602
         (c) ...........   ...............................................   601
         (d) ...........   ...............................................   601
         (e) ...........   ...............................................   514
ss.316(a) ..............   ...............................................   101
         (a)(1)(A) .....                                                     502
                                                                             512
         (a)(1)(B) .....                                                     513
         (a)(2) ........   ....................................   Not Applicable
         (b) ...........   ...............................................   508
         (c) ...........   ...............................................   104
ss.317(a)(1) ...........   ...............................................   503
         (a)(2) ........   ...............................................   504
         (b) ...........   ...............................................  1003
ss.318(a) ..............   ...............................................   107

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

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


<PAGE>



                               TABLE OF CONTENTS
                               -----------------

                                                                            Page

PARTIES..................................................................      1
RECITALS OF THE COMPANY..................................................      1

                                  ARTICLE ONE

                        Definitions and Other Provisions
                             of General Application

Section 101             Definitions......................................      1
                           Act ..........................................      2
                           Affiliate ....................................      2
                           Authenticating Agent .........................      2
                           Board of Directors ...........................      2
                           Board Resolution .............................      3
                           Business Day .................................      3
                           Capital Stock ................................      3
                           Commission ...................................      3
                           Common Stock .................................      3
                           Company ......................................      3
                           Company Request or Company Order .............      3
                           Consolidated Assets ..........................      3
                           Corporate Trust Office .......................      3
                           Covenant Defeasance ..........................      4
                           Debt .........................................      4
                           Defaulted Interest ...........................      4
                           Defeasance ....................................     4
                           Defeasible Series .............................     4
                           Depositary ....................................     4
                           Event of Default ..............................     4
                           Exchange Act ..................................     4
                           Global Security ...............................     4
                           Holder ........................................     4
                           Indenture .....................................     4
                           interest ......................................     5
                           Interest Payment Date .........................     5
                           Maturity ......................................     5
                           Mortgage ......................................     5
                           Nonrecourse Obligation ........................     5
                           Notice of Default .............................     5
                           Officers' Certificate .........................     5
                           Opinion of Counsel ............................     5
                           Original Issue Discount Security ..............     5
                           Outstanding ...................................     5

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

NOTE:  This table of contents shall not, for any purpose, be
           deemed to be a part of the Indenture.

<PAGE>


                                      -ii-

                                                                           Page


                           Paying Agent ..................................     7
                           Person ........................................     7
                           Place of Payment ..............................     7
                           Predecessor Security ..........................     7
                           Principal Property ............................     7
                           Redemption Date ...............................     8
                           Redemption Price ..............................     8
                           Regular Record Date ...........................     8
                           Responsible Officer ...........................     8
                           Securities ....................................     8
                           Security Register and Security
                             Registrar ...................................     8
                           Senior Indebtedness ...........................     8
                           Significant Subsidiary ........................     9
                           Special Record Date ...........................     9
                           Stated Maturity ...............................     9
                           Subsidiary ....................................     9
                           Trading Day ...................................     9
                           Trust Indenture Act ...........................     9
                           Trustee .......................................    10
                           U.S. Government Obligations ...................    10
                           Vice President ................................    10
Section 102  .             Compliance Certificates and Opinions...........    10
Section 103  .             Form of Documents Delivered to Trustee.........    11
Section 104  .             Acts of Holders; Record Dates..................    11
Section 105  .             Notices, Etc., to Trustee and Company..........    14
Section 106  .             Notice to Holders; Waiver......................    15
Section 107  .             Conflict with Trust Indenture Act..............    15
Section 108  .             Effect of Headings and Table of
                             Contents ....................................    16
Section 109  .             Successors and Assigns.........................    16
Section 110  .             Separability Clause............................    16
Section 111  .             Benefits of Indenture..........................    16
Section 112  .             Governing Law..................................    16
Section 113  .             Legal Holidays.................................    17


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

NOTE:  This table of contents shall not, for any purpose, be
           deemed to be a part of the Indenture.



<PAGE>


                                     -iii-

                                                                            Page


                                  ARTICLE TWO

                                 Security Forms

Section 201.   Forms Generally.............................................   17
Section 202.   Form of Face of Security....................................   18
Section 203.   Form of Reverse of Security.................................   20
Section 204.   Form of Legend for Global Securities........................   29
Section 205.   Form of Trustee's Certificate of
                 Authentication............................................   29

                                 ARTICLE THREE

                                 The Securities

Section 301.   Amount Unlimited; Issuable in Series........................   29
Section 302.   Denominations...............................................   33
Section 303.   Execution, Authentication, Delivery
                 and Dating................................................   33
Section 304.   Temporary Securities........................................   35
Section 305.   Registration, Registration of Transfer
                 and Exchange..............................................   36
Section 306.   Mutilated, Destroyed, Lost and Stolen
                 Securities................................................   38
Section 307.   Payment of Interest; Interest Rights
                 Preserved.................................................   39
Section 308.   Persons Deemed Owners.......................................   41
Section 309.   Cancellation................................................   41
Section 310.   Computation of Interest.....................................   41

                                  ARTICLE FOUR

                           Satisfaction and Discharge

Section 401.   Satisfaction and Discharge of Indenture.....................   42
Section 402.   Application of Trust Money..................................   43


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

NOTE:  This table of contents shall not, for any purpose, be
           deemed to be a part of the Indenture.



<PAGE>


                                      -iv-

                                                                            Page


                                  ARTICLE FIVE

                                    Remedies

Section 501.   Events of Default...........................................   43
Section 502.   Acceleration of Maturity; Rescission
                 and Annulment.............................................   46
Section 503.   Collection of Indebtedness and Suits
                 for Enforcement by Trustee................................   47
Section 504.   Trustee May File Proofs of Claim............................   48
Section 505.   Trustee May Enforce Claims Without
                 Possession of Securities..................................   49
Section 506.   Application of Money Collected..............................   49
Section 507.   Limitation on Suits.........................................   49
Section 508.   Unconditional Right of Holders to
                 Receive Principal, Premium and
                 Interest and to Convert...................................   50
Section 509.   Restoration of Rights and Remedies..........................   51
Section 510.   Rights and Remedies Cumulative..............................   51
Section 511.   Delay or Omission Not Waiver................................   51
Section 512.   Control by Holders..........................................   51
Section 513.   Waiver of Past Defaults.....................................   52
Section 514.   Undertaking for Costs.......................................   52
Section 515.   Waiver of Usury, Stay or
                 Extension Laws............................................   53

                                  ARTICLE SIX

                                  The Trustee

Section 601.   Certain Duties and Responsibilities.........................   53
Section 602.   Notice of Defaults..........................................   53
Section 603.   Certain Rights of Trustee...................................   54
Section 604.   Not Responsible for Recitals or
                 Issuance of Securities....................................   55
Section 605.   May Hold Securities.........................................   55
Section 606.   Money Held in Trust.........................................   55
Section 607.   Compensation and Reimbursement..............................   56
Section 608.   Disqualification; Conflicting
                 Interests.................................................   56

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

NOTE:  This table of contents shall not, for any purpose, be
           deemed to be a part of the Indenture.




<PAGE>


                                      -v-

                                                                            Page


Section 609.   Corporate Trustee Required;
                 Eligibility...............................................   57
Section 610.   Resignation and Removal;
                 Appointment of Successor..................................   57
Section 611.   Acceptance of Appointment by
                 Successor.................................................   59
Section 612.   Merger, Conversion, Consolidation
                 or Succession to Business.................................   60
Section 613.   Preferential Collection of Claims
                 Against Company...........................................   61
Section 614.   Appointment of Authenticating Agent.........................   61

                                 ARTICLE SEVEN

               Holders' Lists and Reports by Trustee and Company

Section 701.   Company to Furnish Trustee
                 Names and Addresses of Holders............................   63
Section 702.   Preservation of Information;
                 Communications to Holders.................................   64
Section 703.   Reports by Trustee..........................................   64
Section 704.   Reports by Company..........................................   65

                                 ARTICLE EIGHT

              Consolidation, Merger, Conveyance, Transfer or Lease

Section 801.   Company May Consolidate, Etc., Only
                 on Certain Terms..........................................   65
Section 802.   Successor Substituted.......................................   66

                                  ARTICLE NINE

                            Supplemental Indentures

Section 901.   Supplemental Indentures Without
                 Consent of Holders........................................   67
Section 902.   Supplemental Indentures with Consent
                 of Holders................................................   68
Section 903.   Execution of Supplemental Indentures........................   69
Section 904.   Effect of Supplemental Indentures...........................   70

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NOTE:  This table of contents shall not, for any purpose, be
           deemed to be a part of the Indenture.

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                                      -vi-

                                                                            Page


Section 905.   Conformity with Trust Indenture Act.........................   70
Section 906.   Reference in Securities to
                 Supplemental Indentures...................................   70

                                  ARTICLE TEN

                                   Covenants

Section 1001.  Payment of Principal, Premium and
                 Interest..................................................   70
Section 1002.  Maintenance of Office or Agency.............................   71
Section 1003.  Money for Securities Payments to
                 Be Held in Trust..........................................   71
Section 1004.  Statement by Officers as to Default.........................   73
Section 1005.  Existence...................................................   73
Section 1006.  Limitation on Liens.........................................   74
Section 1007.  Limitation on Certain Debt..................................   77
Section 1008.  Provision of Financial Information..........................   77
Section 1009.  Waiver of Certain Covenants.................................   77

                                 ARTICLE ELEVEN

                             Redemption of Securities

Section 1101.  Applicability of Article....................................   78
Section 1102.  Election to Redeem; Notice to Trustee.......................   78
Section 1103.  Selection by Trustee of Securities
                 to Be Redeemed............................................   78
Section 1104.  Notice of Redemption........................................   79
Section 1105.  Deposit of Redemption Price.................................   80
Section 1106.  Securities Payable on Redemption Date.......................   81
Section 1107.  Securities Redeemed in Part.................................   81

                                 ARTICLE TWELVE

                                 Sinking Funds

Section 1201.  Applicability of Article....................................   82
Section 1202.  Satisfaction of Sinking Fund Payments
                 with Securities...........................................   82
Section 1203.  Redemption of Securities for Sinking Fund...................   83

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NOTE:  This table of contents shall not, for any purpose, be
           deemed to be a part of the Indenture.



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                                     -vii-

                                                                            Page



                                ARTICLE THIRTEEN


                       Defeasance and Covenant Defeasance

Section 1301.  Company's Option to Effect Defeasance
                 or Covenant Defeasance....................................   83
Section 1302.  Defeasance and Discharge....................................   83
Section 1303.  Covenant Defeasance.........................................   84
Section 1304.  Conditions to Defeasance or Covenant
                 Defeasance................................................   85
Section 1305.  Deposited Money and U.S. Government
                 Obligations to be Held in Trust; Other
               Miscellaneous Provisions....................................   87
Section 1306.  Reinstatement...............................................   88

                                ARTICLE FOURTEEN

                            Conversion of Securities

Section 1401.  Applicability; Conversion Privilege
                 and Conversion Price......................................   88
Section 1402.  Exercise of Conversion Privilege............................   89
Section 1403.  Fractions of Shares.........................................   90
Section 1404.  Adjustment of Conversion Price..............................   91
Section 1405.  Notice of Adjustments of Conversion
                 Price.....................................................   96
Section 1406.  Notice of Certain Corporate Action..........................   96
Section 1407.  Company to Reserve Common Stock.............................   97
Section 1408.  Taxes on Conversions........................................   97
Section 1409.  Covenant as to Common Stock.................................   98
Section 1410.  Cancellation of Converted Securities........................   98
Section 1411.  Provisions in Case of Reclassification,
                 Consolidation, Merger or Sale of
                 Assets....................................................   98
Section 1412.  Responsibility of Trustee and
                 Conversion Agent..........................................   99



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NOTE:  This table of contents shall not, for any purpose, be
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                                     -viii-

                                                                            Page


                                ARTICLE FIFTEEN

                          Subordination of Securities

Section 1501.  Securities Subordinate to Senior
                 Indebtedness..............................................  100
Section 1502.  Priority of Senior Indebtedness Upon
                 Dissolution of the Company................................  100
Section 1503.  Notice to Senior Indebtedness of
                 Acceleration on Event of Default..........................  102
Section 1504.  Certain Distributions of Company
                 Assets to the Trustee or Holders
                 of the Securities to be Held in Trust
                 for Holders of Senior
                 Indebtedness..............................................  102
Section 1505.  Subrogation of Security Holders to
                 Rights of Holders of Senior
                 Indebtedness..............................................  103
Section 1506.  Obligation of Company to Pay Security
                 Holders Not Impaired......................................  104
Section 1507.  Payments on Securities Not to be Made
                 During Continuance of Defaults in
                 Respect of Senior Indebtedness............................  104
Section 1508.  Obligation of Company to Pay Security
                 Holders; Application by Trustee of
                 Moneys Deposited with it to Payment
                 of Security Holders.......................................  105
Section 1509.  Trustee as Holder of Senior
                 Indebtedness..............................................  106
Section 1510.  Security Holders Authorize Trustee to
                 Effectuate Subordination..................................  106
Section 1511.  Securities to Rank Pari Passu...............................  106


TESTIMONIUM................................................................  107
SIGNATURES AND SEALS.......................................................  107
ACKNOWLEDGMENTS............................................................  108


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NOTE:  This table of contents shall not, for any purpose, be
           deemed to be a part of the Indenture.



<PAGE>


                  INDENTURE,  dated as of May 15,  1995,  between  Magma  Copper
Company,  a corporation  duly organized and existing under the laws of the State
of Delaware  (herein called the "Company"),  having its principal office at 7400
North Oracle Road, Suite 200,  Tucson,  Arizona 85704, and State Street Bank and
Trust Company, a banking  corporation duly organized and existing under the laws
of The Commonwealth of Massachusetts, as Trustee (herein called the "Trustee").


                            RECITALS OF THE COMPANY

                  The Company has duly  authorized the execution and delivery of
this  Indenture to provide for the issuance  from time to time of its  unsecured
debentures,  notes  or  other  evidences  of  indebtedness  (herein  called  the
"Securities"), to be issued in one or more series as in this Indenture provided.

                  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 agreed, for the equal and
proportionate  benefit of all Holders of the Securities or of 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 Trust
         Indenture  Act,  either  directly  or by  reference  therein,  have the
         meanings assigned to them therein;

                 (3)  all accounting terms not otherwise defined herein have the
         meanings  assigned  to  them  in  accordance  with  generally  accepted
         accounting  principles,  and,  except  as  otherwise  herein  expressly
         provided,  the term "generally  accepted  accounting  principles"  with
         respect to any computation  required or permitted  hereunder shall mean
         such  accounting  principles as are  generally  accepted at the date of
         such computation;

                 (4)  the words  "Article"  and  "Section"  refer to an  Article
         and Section, respectively, of this Indenture; and

                 (5)  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  Articles  Six,  Ten and
Thirteen, are defined in those Articles.

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

                  "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.  The  Trustee  shall  not be  deemed  to know  that any  Person is an
affiliate of another  unless it has received  written notice of such fact or one
of its Responsible Officers has actual knowledge thereof.

                  "Authenticating  Agent"  means any  Person  authorized  by the
Trustee  pursuant to Section 614 to act on behalf of the Trustee to authenticate
Securities of one or more series.

                  "Board of  Directors"  means  either the board of directors of
the Company or any duly authorized committee of that board.

                  "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 of Directors and to be in full force and effect on the date of such
cer- tification, and delivered to the Trustee.

                  "Business  Day",  when  used  with  respect  to any  Place  of
Payment, means each Monday, Tuesday, Wednesday, Thursday and Friday which is not
a day on which banking  institutions  in that Place of Payment are authorized or
obligated by law or executive order to close.

                  "Capital   Stock"   means  any  and  all  shares,   interests,
participations or other equivalents  (however  designated) of corporate stock of
the Company.

                  "Commission"  means the  Securities  and Exchange  Commission,
from time to time constituted, created under the Exchange Act or, if at any time
after the  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 at such time.

                  "Common  Stock"  means any  stock of any class of the  Company
which has no  preference  in respect of dividends  or of amounts  payable in the
event of any voluntary or involuntary liquidation,  dissolution or winding-up of
the Company and which is not subject to redemption by the Company.

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

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

                  "Consolidated  Assets" means the  aggregate  amount of assets,
all as set  forth on the  most  recent  balance  sheet  of the  Company  and its
consolidated  Subsidiaries  and computed in accordance  with generally  accepted
accounting principles.

                  "Corporate  Trust Office"  means the  principal  office of the
Trustee located on the date of this Indenture in Boston,  Massachusetts at which
at any particular time its corporate trust business shall be administered.

                  "Covenant Defeasance" has the meaning specified in 
Section 1303.

                  "Debt" has the meaning specified in Section 1006.

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

                  "Defeasance" has the meaning specified in Section 1302.

                  "Defeasible Series" has the meaning specified in Section 1301.

                  "Depositary"  means,  with respect to Securities of any series
issuable  in whole or in part in the form of one or more  Global  Securities,  a
clearing agency  registered  under the Exchange Act that is designated to act as
Depositary for such Securities as contemplated by Section 301.

                  "Event of Default" has the meaning specified in Section 501.

                  "Exchange Act" means the  Securities  Exchange Act of 1934, as
amended from time to time, and any statute successor thereto.

                  "Global  Security" means a Security that evidences all or part
of the  Securities  of any series and is  authenticated  and  delivered  to, and
registered  in the name of,  the  Depositary  for such  Securities  or a nominee
thereof.

                  "Holder" means a Person in whose name a Security
is registered in the Security Register.

                  "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,
including,  for all  purposes  of this  instrument,  and any  such  supplemental
indenture,  the  provisions  of the Trust  Indenture Act that are deemed to be a
part  of and  govern  this  instrument  and  any  such  supplemental  indenture,
respectively.  The term  "Indenture"  shall also include the terms of particular
series of Securities established as contemplated by Section 301.

                  "interest",  when  used  with  respect  to an  Original  Issue
Discount  Security which by its terms bears interest only after Maturity,  means
interest payable after Maturity.

                  "Interest  Payment  Date",  when  used  with  respect  to  any
Security,  means the  Stated  Maturity  of an  instalment  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  instalment  of  principal
becomes  due and  payable as therein or herein  provided,  whether at the Stated
Maturity or by declaration of acceleration, call for redemption or otherwise.

                  "Mortgage" has the meaning specified in Section 1006.

                  "Nonrecourse Obligation"  has the meaning specified in Section
1006.

                  "Notice of Default" means a written notice of the
kind specified in Section 501(4).

                  "Officers'  Certificate"  means a  certificate  signed  by the
Chairman of the Board,  a Vice  Chairman of the Board,  the  President or a Vice
President, and by the Treasurer, an Assistant Treasurer or Director of Treasury,
the Secretary or an Assistant  Secretary,  of the Company,  and delivered to the
Trustee. One of the officers signing an Officers'  Certificate given pursuant to
Section 1004 shall be the principal  executive,  financial or accounting officer
of the Company.

                  "Opinion of Counsel" means a written  opinion of counsel,  who
may be counsel for 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:

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

                  (2)  Securities  for whose payment or redemption  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 Securi- ties;  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;

                  (3)  Securities as to which Defeasance has been
         effected pursuant to Section 1302; and

                  (4) 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;

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, (A) the principal
amount  of an  Original  Issue  Discount  Security  that  shall be  deemed to be
Outstanding shall be the amount of the principal thereof  (excluding  premium or
penalty,  if  any)  that  would  be due  and  payable  as of the  date  of  such
determination upon acceleration of the Maturity thereof to such date pursuant to
Section 502, (B) the principal  amount of a Security  denominated in one or more
foreign  currencies  or  currency  units that shall be deemed to be  Outstanding
shall be the  U.S.  dollar  equivalent,  determined  as of the date of  original
issuance of such Security in the manner provided as contemplated in Section 301,
of the principal amount (or, in the case of an Original Issue Discount Security,
the U.S. dollar  equivalent on the date of original issuance of such Security of
the amount determined as provided in Clause (A) above) of such Security,  (C) if
the  principal  amount  payable  at  Stated  Maturity  of  any  Security  is not
determinable upon original issuance,  the principal amount of such Security that
shall be deemed to be Outstanding shall be the amount as specified or determined
as contemplated  by Section 301, and (D) 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 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 or any premium or interest on any  Securities on behalf of
the Company.

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

                  "Place of Payment",  when used with respect to the  Securities
of any series,  means the place or places where the principal of and any premium
and  interest  on the  Securities  of that series are  payable as  specified  as
contemplated by Section 301.

                  "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  shall be deemed to
evidence the same debt as the mutilated, destroyed, lost or stolen Security.

                  "Principal  Property" means any smelters,  refineries,  mines,
concentrators or other  facilities,  located within the present 50 States of the
United States of America  (excluding  the  territories  and  possessions  of the
United  States of America) and owned by the Company or any  Subsidiary,  in each
case the gross book value (without  deduction of any  depreciation  reserves) of
which on the date as of which the  determination  is being  made  exceeds  3% of
Consolidated  Assets,  other than any such  portion  thereof  which is pollution
control or other equipment or facility financed by obligations issued by a State
or local government unit,  provided,  however that Principal  Property shall not
include any  smelters,  refineries,  mines,  concentrators  or facilities or any
portions  thereof  which the  Board of  Directors  of the  Company  declares  by
resolution are not of material importance to the total business conducted by the
Company and its Subsidiaries as an entirety.

                  "Redemption  Date",  when used with respect to any Security to
be  redeemed,  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.

                  "Regular Record Date" for the interest payable on any Interest
Payment Date on the  Securities of any series means the date  specified for that
purpose as contemplated by Section 301.

                  "Responsible Officer",  when used with respect to the Trustee,
means any officer of the Trustee in its  corporate  trust  department or similar
group  administering  the  trusts  hereunder  customarily  performing  functions
similar to those performed by the Persons who at the time shall be such officers
or, with respect to a particular  corporate  trust matter,  any other officer to
whom such matter is referred  because of his knowledge of and  familiarity  with
the particular subject.

                  "Securities"  has the meaning  stated in the first  recital of
this  Indenture and more  particularly  means any Securities  authenticated  and
delivered under this Indenture.

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

                  "Senior  Indebtedness"  means  indebtedness of the Company and
indebtedness  guaranteed  by the  Company for (a) money  borrowed  from banks or
other  lending  institutions,  whether  outstanding  on the date of the  initial
issuance of any of the  Securities  or  thereafter  incurred,  and (b) any other
indebtedness  or obligation of the Company,  whether  outstanding on the date of
the initial issuance of any of the Securities or thereafter  created,  incurred,
assumed or guaranteed, which is evidenced by a note or other similar instrument,
unless by the terms of such note or other  instrument  it is provided  that such
indebtedness  is not superior in right of payment to the  Securities;  provided,
however, that Senior Indebtedness shall not include (w) any series of Securities
issued pursuant to this Indenture,  the Company's 12% Senior  Subordinated Notes
due 2001 or the  Company's  11.5% Senior  Subordinated  Notes due 2002,  (x) any
trade payables or notes or other  instruments  evidencing the same, (y) notes or
other  obligations  issued  in lieu of cash  dividends  on, or in  exchange  for
Capital Stock or (z) any liability for federal, state, local or other taxes owed
or owing  by the  Company.  The term  "Senior  Indebtedness"  includes,  without
limitation,  (i) any and all interest accruing on any of the Senior Indebtedness
after the commencement of any bankruptcy,  insolvency,  reorganization  or other
similar  proceeding,  notwithstanding  any  provision or rule of law which might
restrict the rights of any holder  thereof as to such  interest and (ii) any and
all claims for principal  and premium of,  interest on, and fees and expenses in
respect of, Senior Indebtedness  described in clause (a) above,  notwithstanding
any disallowance, avoidance or subordination of such claim under any insolvency,
fraudulent conveyance or equitable subordination law.

                  "Significant  Subsidiary"  means any Subsidiary of the Company
which  owns a  Principal  Property  and any  Subsidiary  that owns  directly  or
indirectly stock of a Significant Subsidiary.

                  "Special  Record  Date"  for  the  payment  of  any  Defaulted
Interest means a date fixed by the Company pursuant to Section 307.

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

                  "Subsidiary"   means  a  corporation  more  than  50%  of  the
outstanding  voting  stock of which is owned,  directly  or  indirectly,  by the
Company or by one or more other Subsidiaries,  or by the Company and one or more
other  Subsidiaries.  For the purposes of this definition,  "voting stock" means
stock which  ordinarily has 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.

                  "Trading Day" means each Monday, Tuesday, Wednesday,  Thursday
and  Friday,  other  than  any day on which  securities  are not  traded  on the
exchange or in the quotation  system that is the principal market for the Common
Stock.

                  "Trust Indenture Act" means the Trust Indenture Act of 1939 as
amended and as in force at the date as of which this  instrument  was  executed;
provided,  however, that in the event the Trust Indenture Act of 1939 is amended
after such date, "Trust Indenture Act" means, to the extent required by any such
amendment, the Trust Indenture Act of 1939 as so amended.


                  "Trustee"  means the Person  named as the Trustee in the first
paragraph of this  instrument  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, and
if at any time  there  is more  than one such  Person,  "Trustee"  as used  with
respect to the  Securities of any series shall mean each Trustee with respect to
Securities of that series.

                  "U. S. Government  Obligations" has  the  meaning specified in
Section 1304.

                  "Vice President", when used with respect to the Company or the
Trustee,  means any vice  president,  whether or not designated by a number or a
word or words added before or after the title "vice president".


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 such  certificates  and opinions as may be required under
the Trust Indenture Act. Each such  certificate or opinion shall be given in the
form of an Officers'  Certificate,  if to be given by an officer of the Company,
or an Opinion of Counsel,  if to be given by counsel,  and shall comply with the
requirements of the Trust Indenture Act and any other  requirements set forth in
this Indenture.

                  Every certificate or opinion with respect to compliance with a
condition or covenant  provided for in this  Indenture  (including  certificates
provided for in Section 1004) shall include

                  (1) a statement that each individual  signing such certificate
         or opinion has read such  covenant  or  condition  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  covenant
         or condition 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  with respect 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 a certificate or opinion of,
or representations by, counsel, unless such officer knows, or in the exercise of
reasonable care should know, that the certificate or opinion or  representations
with respect to the matters upon which his  certificate  or opinion is based are
erroneous.  Any such certificate or opinion of counsel 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  stating  that the
information  with respect to such factual  matters is in the  possession  of the
Company, unless such counsel knows, or in the exercise of reasonable care should
know,  that the certificate or opinion or  representations  with respect 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; Record Dates.

                  Any  request,  demand,   authorization,   direction,   notice,
consent,  waiver or other action  provided or permitted by this  Indenture to be
given  or taken by  Holders  may be  embodied  in and  evidenced  by one or more
instruments of  substantially  similar tenor signed by such Holders in person or
by agent duly appointed in writing;  and, except as herein  otherwise  expressly
provided, such action shall become effective when such instrument or instruments
are delivered to the Trustee and, where it is hereby expressly required,  to the
Company.  Such instrument or instruments  (and the action  embodied  therein and
evidenced  thereby) are herein sometimes referred to as the "Act" of the Holders
signing  such  instrument  or  instruments.  Proof  of  execution  of  any  such
instrument or of a writing appointing any such agent shall be sufficient for any
purpose of this  Indenture  and (subject to Section 601)  conclusive in favor of
the Trustee and the Company, if made in the manner provided in this Section.

                  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 manner which the Trustee deems sufficient.

                  The  ownership of  Securities  shall be proved by the Security
Register.

                  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 or
the Company in reliance thereon,  whether or not notation of such action is made
upon such Security.

                  The Company may, in the  circumstances  permitted by the Trust
Indenture Act, set any day as the record date for the purpose of determining the
Holders of Outstanding Securities of any series entitled to give or take any Act
provided  or  permitted  by this  Indenture  to be given or taken by  Holders of
Securities  of such series.  With regard to any record date set pursuant to this
paragraph,  the Holders of Outstanding Securities of the relevant series on such
record date (or their duly appointed  agents),  and only such Persons,  shall be
entitled to give or take the relevant action, whether or not such Holders remain
Holders  after such  record date.  With  regard to  any  Act  that may  be given
or  taken  hereunder  only  by  Holders  of  a  requisite  principal  amount  of
Outstanding  Securities of any series (or their duly  appointed  agents) and for
which a record date is set pursuant to this  paragraph,  the Company may, at its
option,  set an expiration date after which no such action purported to be given
or taken by any Holder shall be effective  hereunder unless given or taken on or
prior to such  expiration date by Holders of the requisite  principal  amount of
Outstanding  Securities  of such  series  on such  record  date (or  their  duly
appointed  agents).  On or prior to any  expiration  date set  pursuant  to this
paragraph,  the Company may, on one or more occasions at its option, extend such
date to any later date.  Nothing in this paragraph  shall prevent any Holder (or
any duly  appointed  agent  thereof)  from  giving  or  taking,  after  any such
expiration  date,  any  action  identical  to, or, at any time,  contrary  to or
different  from, the action or purported  action to which such  expiration  date
relates,  in which event the  Company  may set a record date in respect  thereof
pursuant to this  paragraph.  Nothing in this  paragraph  shall be  construed to
render  ineffective  any action  taken at any time by the Holders (or their duly
appointed agents) of the requisite principal amount of Outstanding Securities of
the  relevant  series on the date such action is so taken.  Notwithstanding  the
foregoing or the Trust  Indenture  Act, the Company  shall not set a record date
for, and the provisions of this  paragraph  shall not apply with respect to, any
notice, declaration or direction referred to in the next paragraph.

                  Upon receipt by the Trustee from any Holder of Securities of a
particular  series of (i) any written notice of default or breach referred to in
Section  501(4) or 501(5) with respect to  Securities  of such  series,  if such
default or breach has occurred and is continuing  and the Trustee shall not have
given such written notice to the Company,  (ii) any  declaration of acceleration
referred to in Section 502, if an Event of Default with respect to Securities of
such series has occurred and is continuing  and the Trustee shall not have given
such a declaration to the Company, or (iii) any direction referred to in Section
512 with respect to  Securities  of such series,  if the Trustee  shall not have
taken  the  action  specified  in  such  direction,  then a  record  date  shall
automatically  and  without  any action by the Company or the Trustee be set for
determining  the Holders of  Outstanding  Securities of such series  entitled to
join in such notice,  declaration  or direction,  which record date shall be the
close of  business  on the tenth  day  following  the day on which  the  Trustee
receives such notice,  declaration or direction.  Promptly after such receipt by
the  Trustee,  and in any case not  later  than the fifth  day  thereafter,  the
Trustee  shall notify the Company and the Holders of  Outstanding  Securities of
such  series  of any such  record  date so fixed.  The  Holders  of  Outstanding
Securities of such series on such record date (or their duly appointed  agents),
and only such Persons, shall be entitled to join in such notice,  declaration or
direction,  whether or not such Holders  remain  Holders after such record date;
provided that,  unless such notice,  declaration or direction  shall have become
effective by virtue of Holders of the requisite  principal amount of Outstanding
Securities of such series on such record date (or their duly  appointed  agents)
having joined  therein on or prior to the 90th day after such record date,  such
notice,  declaration or direction shall  automatically and without any action by
any Person be  cancelled  and of no further  effect.  Nothing in this  paragraph
shall be construed to prevent a Holder (or a duly appointed  agent thereof) from
giving,  before  or after  the  expiration  of such  90-day  period,  a  notice,
declaration or direction contrary to or different from, or, after the expiration
of such period, identical to, the notice, declaration or direction to which such
record date relates,  in which event a new record date in respect  thereof shall
be set pursuant to this paragraph.  Nothing in this paragraph shall be construed
to render ineffective any notice,  declaration or direction of the type referred
to in this paragraph given at any time to the Trustee and the Company by Holders
(or  their  duly  appointed  agents)  of  the  requisite   principal  amount  of
Outstanding  Securities  of  the  relevant  series  on  the  date  such  notice,
declaration or direction is so given.

                  Without limiting the foregoing, a Holder entitled hereunder to
give or take any action hereunder with regard to any particular  Security may do
so with regard to all or any part of the principal amount of such Security or by
one or more  duly  appointed  agents  each of which may do so  pursuant  to such
appointment with regard to all or any different part of such principal amount.


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,

                  (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:
         Corporate Trust Administration, 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  instrument 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 to Holders of any
event,  such  notice  shall  be  sufficiently  given  (unless  otherwise  herein
expressly  provided) if in writing and mailed,  first-class  postage prepaid, to
each Holder affected by such event, at his address as it appears in the Security
Register,  not later than the latest  date (if any),  and not  earlier  than the
earliest date (if any),  prescribed  for the giving of such notice.  In any case
where  notice to  Holders  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.  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.

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


Section 107.   Conflict with Trust Indenture Act.

                  If any provision hereof limits,  qualifies or conflicts with a
provision  of the Trust  Indenture  Act that is required  under such Act to be a
part of and govern this Indenture,  the latter  provision shall control.  If any
provision  of this  Indenture  modifies or excludes  any  provision of the Trust
Indenture Act that may be so modified or excluded, the latter provision shall be
deemed to apply to this Indenture as so modified or to be excluded,  as the case
may be.

Section 108.   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.


Section 109.   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 110.   Separability Clause.

                  In case any provision in this  Indenture or in the  Securities
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 111.   Benefits of Indenture.

                  Nothing in this  Indenture  or in the  Securities,  express or
implied,  shall  give to any  Person,  other than the  parties  hereto and their
successors  hereunder,  the holders of Senior Indebtedness and the Holders,  any
benefit or any legal or equitable right, remedy or claim under this Indenture.


Section 112.   Governing Law.

                  This  Indenture  and the  Securities  shall be governed by and
construed  in  accordance  with the law of the  State of New York,  but  without
regard to principles of conflicts of laws.


Section 113.   Legal Holidays.

                  In any case where any Interest  Payment Date,  Redemption Date
or Stated  Maturity  of any  Security or the last date on which a Holder has the
right to convert  his  Securities  shall not be a  Business  Day at any Place of
Payment,  then  (notwithstanding any other provision of this Indenture or of the
Securities  (other than a provision of any Security  which  specifically  states
that such provision shall apply in lieu of this Section)) payment of interest or
principal (and premium, if any) or conversion of the Securities 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 or Redemption  Date, or at the Stated Maturity,  or
on such last date for conversion, provided that no interest shall accrue for the
period from and after such  Interest  Payment  Date,  Redemption  Date or Stated
Maturity, as the case may be.


                                  ARTICLE TWO

                                 Security Forms

Section 201.   Forms Generally.

                  The  Securities of each series shall be in  substantially  the
form set forth in this Article, or in such other form as shall be established by
or  pursuant to a Board  Resolution  or in one or more  indentures  supplemental
hereto, in each case with such appropriate insertions, omissions,  substitutions
and other  variations  as are required or permitted by this  Indenture,  and may
have such letters,  numbers or other marks of identification and such legends or
endorsements  placed  thereon as may be required to comply with the rules of any
securities  exchange or as may,  consistently  herewith,  be  determined  by the
officers executing such Securities,  as evidenced by their execution thereof. If
the form of Securities of any series is  established by action taken pursuant to
a Board  Resolution,  a copy of an  appropriate  record of such action  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  Company  Order
contemplated  by  Section  303  for  the  authentication  and  delivery  of such
Securities.

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

Section 202.  Form of Face of Security.

                  [Insert any legend required by the Internal
Revenue Code and the regulations thereunder.]

                              MAGMA COPPER COMPANY

                  ............................................

No. .........                                                        $ ........

                  Magma  Copper  Company,   a  corporation  duly  organized  and
existing under the laws of Delaware  (herein  called the  "Company",  which term
includes any successor Person under the Indenture  hereinafter referred to), for
value received, hereby promises to pay  to.................................,  or
registered  assigns,  the principal sum  of................  ...................
Dollars  on  ............................  ...........................  [if  the
Security is to bear interest prior to Maturity,  insert -- , and to pay interest
thereon  from  .............  or from the most recent  Interest  Payment Date to
which  interest  has  been  paid  or  duly  pro-  vided  for,  semi-annually  on
............ and ............ in each year, commencing ........., at the rate of
....% per  annum,  until the  principal  hereof  is paid or made  available  for
payment [if applicable, insert -- , provided that any principal and premium, and
any such  installment  of interest,  which is overdue shall bear interest at the
rate of ....% per annum (to the extent that the payment of such  interest  shall
be legally enforceable), from the dates such amounts are due until they are paid
or made  available for payment,  and such interest  shall be payable on demand].
The  interest so  payable,  and  punctually  paid or duly  provided  for, on any
Interest Payment Date will, as provided in such Indenture, be paid to the Person
in  whose  name  this  Security  (or  one or  more  Predecessor  Securities)  is
registered  at the  close  of  business  on the  Regular  Record  Date  for such
interest, which shall be the ....... or ....... (whether or not a Business Day),
as the case may be, next preceding such Interest Payment Date. Any such interest
not so punctually  paid or duly provided for will forthwith  cease to be payable
to the Holder on such  Regular  Record Date and may either be paid to the Person
in  whose  name  this  Security  (or  one or  more  Predecessor  Securities)  is
registered at the close of business on a Special  Record Date for the payment of
such  Defaulted  Interest to be fixed by the Trustee,  notice  whereof  shall be
given to Holders  of  Securities  of this  series not less than 10 days prior to
such Special  Record Date, or be paid at any time in any other lawful manner not
inconsistent  with the  requirements  of any  securities  exchange  on which the
Securities of this series may be listed, and upon such notice as may be required
by such exchange, all as more fully provided in said Indenture].

                  [If the  Security is not to bear  interest  prior to Maturity,
insert -- The principal of this Security  shall not bear interest  except in the
case of a default in payment of principal upon acceleration,  upon redemption or
at  Stated  Maturity  and in such case the  overdue  principal  and any  overdue
premium  shall bear  interest at the rate of ....% per annum (to the extent that
the payment of such interest shall be legally enforceable),  from the dates such
amounts are due until they are paid or made  available for payment.  Interest on
any overdue  principal or premium shall be payable on demand.  Any such interest
on any overdue  principal  or premium  which is not so paid on demand shall bear
interest  at the rate of ......%  per annum (to the extent  that the  payment of
such interest shall be legally enforceable), from the dates such amounts are due
until they are paid or made  available  for  payment.  Interest  on any  overdue
interest shall be payable on demand.]

                  Payment  of the  principal  of (and  premium,  if any) and [if
applicable,  insert -- any such] interest on this Security will be made upon its
presentation for notation of any principal  payment,  or, in the case of a final
payment,  its  surrender at the office or agency of the Company  maintained  for
that purpose in  ............,  in such coin or currency of the United States of
America  as at the time of payment  is legal  tender  for  payment of public and
private debts [if applicable,  insert -- ; provided, however, 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 such  address  shall  appear in the  Security
Register].

                  Reference  is hereby  made to the further  provisions  of this
Security set forth on the reverse hereof, which further provisions shall for all
purposes have the same effect as if set forth at this place.

                  Unless  the  certificate  of  authentication  hereon  has been
executed by the Trustee  referred to on the reverse hereof by manual  signature,
this  Security  shall not be entitled to any benefit  under the  Indenture or be
valid or obligatory for any purpose.

                  IN WITNESS WHEREOF,  the Company has caused this instrument to
be duly executed under its corporate seal.

Dated:


                                                       MAGMA COPPER COMPANY

                                                       By
                                                          ----------------------
Attest:

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

Section 203.   Form of Reverse of Security.

                  This Security is one of a duly authorized  issue of securities
of the Company (herein called the "Securities"),  issued and to be issued in one
or more series under an Indenture,  dated as of May 15, 1995 (herein  called the
"Indenture",  which  term  shall  have  the  meaning  assigned  to  it  in  such
instrument),  between the Company and State  Street Bank and Trust  Company,  as
Trustee (herein called the "Trustee",  which term includes any successor trustee
under the  Indenture),  and  reference  is hereby  made to the  Indenture  for a
statement of the respective rights, limitations of rights, duties and immunities
thereunder of the Company,  the Trustee and the Holders of the Securities and of
the terms  upon  which the  Securities  are,  and are to be,  authenticated  and
delivered.  This Security is one of the series designated on the face hereof [if
applicable, insert --, limited in aggregate principal amount to $...........].

                  [If applicable,  insert -- Subject to and upon compliance with
the provisions of the Indenture, the Holder of this Security is entitled, at his
option,  at any time on or before the close of  business on  ___________,  or in
case this Security or a portion hereof is called for redemption, then in respect
of this  Security or such portion  hereof until and  including,  but (unless the
Company defaults in making the payment due upon redemption) not after, the close
of business on the date prior to the  Redemption  Date, to convert this Security
(or any portion of the  principal  amount  hereof which is $1,000 or an integral
multiple  thereof),  at the principal  amount hereof,  or of such portion,  into
fully paid and  non-assessable  shares  (calculated as to each conversion to the
nearest  1/100 of a share) of Common Stock of the Company at a conversion  price
per share of Common  Stock  equal to $___ per each share of Common  Stock (or at
the current adjusted conversion price if an adjustment has been made as provided
in the  Indenture) by surrender of this  Security,  duly endorsed or assigned to
the Company or in blank, to the Company at its office or agency in ____________,
accompanied  by written  notice to the Company that the Holder  hereof elects to
convert this Security,  or if less than the entire principal amount hereof is to
be converted,  the portion  hereof to be converted,  and, in case such surrender
shall be made during the period from the close of business on any Regular Record
Date next preceding any Interest Payment Date to the opening of business on such
Interest  Payment  Date  (unless  this  Security  or the portion  thereof  being
converted  has been  called for  redemption  on a  Redemption  Date  within such
period),  also  accompanied by payment in New York Clearing House funds or other
funds  acceptable  to the Company of an amount equal to the interest  payable on
such Interest  Payment Date on the principal  amount of this Security then being
converted.  Subject to the aforesaid requirement for payment and, in the case of
a conversion  after the Regular Record Date next preceding any Interest  Payment
Date and on or before such Interest  Payment Date, to the right of the Holder of
this  Security (or any  Predecessor  Security) of record at such Regular  Record
Date to receive an instalment of interest (with certain  exceptions  provided in
the  Indenture),  no  payment  or  adjustment  is to be made on  conversion  for
interest  accrued  hereon  or  for  dividends  on the  Common  Stock  issued  on
conversion.  No  fractions of shares of scrip  representing  fractions of shares
will be issued on conversion, but instead of any fractional interest the Company
shall pay a cash adjustment as provided in the Indenture.  The conversion  price
is  subject to  adjustment  as  provided  in the  Indenture.  In  addition,  the
Indenture  provides that in case of certain  consolidations  or mergers to which
the Company is a party or the transfer of substantially all of the assets of the
Company,  the Indenture shall be amended,  without the consent of any Holders of
Securities,  so that this  Security,  if then  outstanding,  will be convertible
thereafter,  during the period this Security  shall be  convertible as specified
above,  only into the kind and  amount of  securities,  cash and other  property
receivable upon the consolidation,  merger or transfer by a holder of the number
of shares of Common  Stock into which this  Security  might have been  converted
immediately  prior to such  consolidation,  merger or  transfer  (assuming  such
holder of Common  Stock  failed to exercise  any rights of election and received
per share the kind and amount received per share by a  plurality of non-electing
shares).]


                  [If  applicable,  insert -- The  Securities of this series are
subject  to  redemption  upon  not  less  than 30  days'  notice  by  mail,  [if
applicable,  insert -- (1) on ...........  in any year  commencing with the year
...... and ending with the year ...... through operation of the sinking fund for
this series at a Redemption  Price equal to 100% of the prin- cipal amount,  and
(2)] at any time [if applicable,  insert -- on or after ..........,  19..], as a
whole or in part, at the election of the Company,  at the  following  Redemption
Prices  (expressed  as  percentages  of the principal  amount):  If redeemed [if
applicable, insert -- on or before ..............., __%, and if redeemed] during
the 12-month period beginning ............. of the years indicated,

                Redemption                                        Redemption
Year              Price                     Year                     Price
----            ----------                  ----                  ----------













and  thereafter at a Redemption  Price equal to .....% of the principal  amount,
together in the case of any such redemption [if  applicable,  insert -- (whether
through operation of the sinking fund or otherwise)] with accrued interest up to
but not including the Redemption  Date, but interest  installments  whose Stated
Maturity is on or prior to such  Redemption  Date will be payable to the Holders
of such  Securities,  or one or more  Predecessor  Securities,  of record at the
close of business on the relevant  Record Dates  referred to on the face hereof,
all as provided in the Indenture.]

                  [If  applicable,  insert -- The  Securities of this series are
subject  to  redemption  upon not  less  than 30 days'  notice  by mail,  (1) on
............  in any year commencing with the year .... and ending with the year
.... through operation of the sinking fund for this series at the


Redemption  Prices  for  redemption   through  operation  of  the  sinking  fund
(expressed as percentages of the principal amount) set forth in the table below,
and (2) at any time [if applicable,  insert -- on or after  ............],  as a
whole or in part, at the election of the Company,  at the Redemption  Prices for
redemption  otherwise than through  operation of the sinking fund  (expressed as
percentages of the principal  amount) set forth in the table below:  If redeemed
during the 12-month period beginning ............ of the years indicated,

                         Redemption Price
                          For Redemption                   Redemption Price For
                         Through Operation                 Redemption Otherwise
                              of the                      Than Through Operation
Year                       Sinking Fund                    of the Sinking Fund
----                     -----------------                ----------------------













and  thereafter at a Redemption  Price equal to .....% of the principal  amount,
together in the case of any such redemption  (whether  through  operation of the
sinking fund or  otherwise)  with accrued  interest up to but not  including the
Redemption Date, but interest  installments whose Stated Maturity is on or prior
to such  Redemption Date will be payable to the Holders of such  Securities,  or
one or more  Predecessor  Securities,  of record at the close of business on the
relevant  Record Dates  referred to on the face  hereof,  all as provided in the
Indenture.]

                  [If  applicable,  insert -- The  sinking  fund for this series
provides for the redemption on ............ in each year beginning with the year
.......  and ending with the year ...... of [if  applicable,  insert -- not less
than  $..........  ("mandatory  sinking  fund")  and not more  than]  $.........
aggregate  principal  amount of  Securities  of this series.  Securities of this
series  acquired  or  redeemed  by  the  Company   otherwise  than  through  [if
applicable, insert -- mandatory] sinking fund payments [if applicable, insert --
and Securities  surrendered for conversion] may be credited  against  subsequent
[if applicable, insert -- mandatory] sinking fund payments otherwise required to
be made [if  applicable,  insert -- in the  inverse  order in which they  become
due].]

                  [If the Security is subject to redemption of any kind,  insert
-- In the event of redemption [if  applicable,  insert -- or conversion] of this
Security in part only, a new Security or  Securities  of this series and of like
tenor for the  unredeemed  [if  applicable,  insert -- or  unconverted]  portion
hereof  will be issued in the name of the Holder  hereof  upon the  cancellation
hereof.]

                  The indebtedness  evidenced by this Security is, to the extent
provided in the  Indenture,  subordinate  and subject in right of payment to the
prior  payment in full of all Senior  Indebtedness,  and this Security is issued
subject to the provisions of the Indenture with respect thereto.  Each Holder of
this  Security,  by accepting the same, (a) agrees to and shall be bound by such
provisions,  (b) authorizes and directs the Trustee on his behalf to take action
as may be necessary or appropriate to effectuate the  subordination  so provided
and (c) appoints the Trustee his attorney-in-fact for any and all such purposes.

                  [If applicable,  insert -- The Indenture  contains  provisions
for defeasance at any time of [(1) the entire  indebtedness  of this Security or
(2)] certain  restrictive  covenants  and Events of Default with respect to this
Security,  in each case upon compliance with certain conditions set forth in the
Indenture.]

                  [If the Security is not an Original Issue  Discount  Security,
insert -- If an Event of Default with respect to Securities of this series shall
occur and be  continuing,  the principal of the Securities of this series may be
declared  due and  payable in the manner  and with the  effect  provided  in the
Indenture.]

                  [If the  Security  is an  Original  Issue  Discount  Security,
insert -- If an Event of Default with respect to Securities of this series shall
occur and be continuing, an amount of principal of the Securities of this series
may be declared  due and  payable in the manner and with the effect  provided in
the Indenture.  Such amount shall be equal to -- insert formula for  determining
the amount.  Upon  payment (i) of the amount of  principal  so declared  due and
payable and (ii) of interest on any overdue principal,  premium and interest (in
each case to the  extent  that the  payment  of such  interest  shall be legally
enforceable),  all of the Company's obligations in respect of the payment of the
principal  of and  interest,  if any, on the  Securities  of this  series  shall
terminate.]

                  The  Indenture  permits,  with certain  exceptions  as therein
provided,  the  amendment  thereof  and  the  modification  of  the  rights  and
obligations  of the Company and the rights of the Holders of the  Securities  of
each series to be affected  under the  Indenture  at any time by the Company and
the Trustee with the consent of the Holders of a majority in principal amount of
the  Securities  at the time  Outstanding  of each  series to be  affected.  The
Indenture  also  contains   provisions   permitting  the  Holders  of  specified
percentages  in principal  amount of the  Securities  of each series at the time
Outstanding, on behalf of the Holders of all Securities of such series, to waive
compliance  by the Company with certain  provisions of the Indenture and certain
past defaults  under the Indenture and their  consequences.  Any such consent or
waiver by the Holder of this Security  shall be conclusive and binding upon such
Holder and upon all future  Holders of this Security and of any Security  issued
upon the  registration  of  transfer  hereof or in  exchange  herefor or in lieu
hereof,  whether  or not  notation  of such  consent or waiver is made upon this
Security.

                  As provided in and subject to the provisions of the Indenture,
the Holder of this Security shall not have the right to institute any proceeding
with respect to the Indenture or for the appointment of a receiver or trustee or
for any other remedy thereunder,  unless such Holder shall have previously given
the Trustee written notice of a continuing  Event of Default with respect to the
Securities of this series,  the Holders of not less than 25% in principal amount
of the Securities of this series at the time Outstanding shall have made written
request to the  Trustee  to  institute  proceedings  in respect of such Event of
Default as Trustee and offered the Trustee reasonable  indemnity and the Trustee
shall not have  received  from the Holders of a majority in principal  amount of
Securities of this series at the time Outstanding a direction  inconsistent with
such  request,  and shall have failed to institute any such  proceeding,  for 60
days after receipt of such notice, request and offer of indemnity. The foregoing
shall not apply to any suit  instituted  by the Holder of this  Security for the
enforcement of any payment of principal hereof or any premium or interest hereon
on or after the respective due dates expressed herein.

                  Subject to the rights of  holders of Senior  Indebtedness,  as
set forth in the Indenture,  no other  reference  herein to the Indenture and no
other provision of this Security or of the  Indenture shall alter or impair  the
obligation  of the  Company,  which is absolute  and  unconditional,  to pay the
principal of and any premium and interest on this  Security at the times,  place
and rate, and in the coin or currency, herein prescribed [if applicable,  insert
-- or to convert this Security as provided in the Indenture].

                  As   provided  in  the   Indenture   and  subject  to  certain
limitations  therein set forth, the transfer of this Security is registerable in
the Security  Register,  upon  surrender of this  Security for  registration  of
transfer at the office or agency of the Company in any place where the principal
of and any premium and interest on this Security are payable,  duly endorsed by,
or accompanied by a written  instrument of transfer in form  satisfactory to the
Company and the Security  Registrar  duly  executed by, the Holder hereof or his
attorney duly authorized in writing, and thereupon one or more new Securities of
this  series and of like tenor,  of  authorized  denominations  and for the same
aggregate  principal  amount,  will be issued to the  designated  transferee  or
transferees.

                  The  Securities of this series are issuable only in registered
form  without  coupons  in  denominations  of $1,000 and any  integral  multiple
thereof. As provided in the Indenture and subject to certain limitations therein
set forth,  Securities  of this  series are  exchangeable  for a like  aggregate
principal  amount of  Securities of this series and of like tenor of a different
authorized denomination, as requested by the Holder surrendering the same.

                  No service charge shall be made for any such  registration  of
transfer or exchange, but the Company may require payment of a sum sufficient to
cover any tax or other governmental charge payable in connection therewith.

                  Prior to due presentment of this 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 this  Security  is  registered  as the owner
hereof for all purposes,  whether or not this  Security be overdue,  and neither
the  Company,  the Trustee nor any such agent shall be affected by notice to the
contrary.

                  All  terms  used in this  Security  which are  defined  in the
Indenture shall have the meanings assigned to them in the Indenture.

                
                   [If applicable, insert --


                          [FORM OF CONVERSION NOTICE]


To:  MAGMA COPPER COMPANY



         The undersigned owner of this Security hereby irrevocably exercises the
option to  convert  this  Security,  or  portion  hereof  (which is $1,000 or an
integral  multiple  thereof)  below  designated,  into shares of Common Stock of
Magma Copper Company in accordance  with the terms of the Indenture  referred to
in this Security,  and directs that the shares issuable and deliverable upon the
conversion,  together  with any check in payment for  fractional  shares and any
Securities,  representing any unconverted principal amount hereof, be issued and
delivered  to the  registered  holder  hereof  unless a different  name has been
indicated  below.  If shares are to be issued in the name of a person other than
the  undersigned,  the  undersigned  will pay all  transfer  taxes  payable with
respect thereto. Any amount required to be paid by the undersigned on account of
interest accompanies this Security.

Dated:

Fill in for  registration 
  of shares of Common Stock and
  Securities  if to be issued 
  otherwise than to the 
  registered holder.
                                                        Principal  Amount  to be
                                                        converted     (in     an
                                                        integral   multiple   of
                                                        $1,000,   if  less  than
                                                        all):
                                                              $
          
                                                  
-----------------------------
          Name

-----------------------------
        Address

-----------------------------                     -------------------------
(Please print name and                                   Signature
address, including zip code
number)


SOCIAL SECURITY OR OTHER
  TAXPAYER IDENTIFYING
         NUMBER
                                                  [SIGNATURE    GUARANTEED*   --
                                                  required  only if Common Stock
                                                  and   Securities   are  to  be
                                                  issued and  delivered to other
                                                  than  the  registered  holder]


                                                  ---------------------------] *
                                                  Participant  in  a  recognized
                                                  Signature   Medallion  Program
                                                  (or other signature  guarantee
                                                  program   acceptable   to  the
                                                  Trustee)


Section 204.  Form of Legend for Global Securities.

                  Unless otherwise  specified as contemplated by Section 301 for
the  Securities  evidenced  thereby,  every Global  Security  authenticated  and
delivered hereunder shall bear a legend in substantially the following form:

         This Security is a Global  Security within the meaning of the Indenture
         hereinafter  referred to and is  registered in the name of a Depositary
         or a nominee  thereof.  This  Security  may not be  transferred  to, or
         registered or exchanged for  Securities  registered in the name of, any
         Person  other  than the  Depositary  or a nominee  thereof  and no such
         transfer  may  be  registered,  except  in  the  limited  circumstances
         described in the Indenture.  Every Security authenticated and delivered
         upon  registration  of transfer  of, or in exchange  for or in lieu of,
         this  Security  shall be a Global  Security  subject to the  foregoing,
         except in such limited circumstances.


Section 205.   Form of Trustee's Certificate of
               Authentication.

                  The  Trustee's  certificates  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 Signatory


                                 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 or  pursuant  to a Board  Resolution  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,

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

                  (2) any  limit  upon the  aggregate  principal  amount  of the
         Securities of the series which 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 or 1107
         and except for any  Securities  which,  pursuant  to Section  303,  are
         deemed never to have been authenticated and delivered hereunder);

                  (3) the  Person  to whom any  interest  on a  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;

                  (4)  the date or dates on which the principal of
         the Securities of the series is payable;

                  (5) the rate or rates at which the  Securities  of the  series
         shall bear interest, if any, the date or dates from which such interest
         shall  accrue,  the Interest  Payment  Dates on which any such interest
         shall be payable and the Regular  Record Date for any interest  payable
         on any Interest Payment Date;

                  (6)  the place or places where the principal of
         and any premium and interest on Securities of the
         series shall be payable;

                  (7) the period or periods within which, the price or prices at
         which and the terms and conditions upon which  Securities of the series
         may be redeemed, in whole or in part, at the option of the Company and,
         if other than by a Board  Resolution,  the manner in which any election
         by the Company to redeem the Securities shall be evidenced;

                  (8) the  obligation,  if any,  of the  Company  to  redeem  or
         purchase  Securities  of the series  pursuant  to any  sinking  fund or
         analogous  provisions  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  Securities  of the  series  shall be
         redeemed  or  purchased,   in  whole  or  in  part,  pursuant  to  such
         obligation;

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

                 (10)  if other  than  the  currency  of the  United  States  of
         America,  the  currency,  currencies  or  currency  units in which  the
         principal of or any premium or interest on any Securities of the series
         shall be payable and the manner of determining  the equivalent  thereof
         in the  currency of the United  States of America  for  purposes of the
         definition of "Outstanding" in Section 101;

                 (11)  if the amount of  principal of or any premium or interest
         on any Securities of the series may be determined  with reference to an
         index, the manner in which such amounts shall be determined;

                 (12)  if the  principal  of or any  premium or  interest on any
         Securities  of the  series 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 the Securities are stated to be
         payable, the currency, currencies or currency units in which payment of
         the  principal  of and any premium and interest on  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 and the  amount so  payable  (or the  manner in
         which such amount shall be determined);

                 (13)  if other than the principal  amount thereof,  the portion
         of the  principal  amount of  Securities  of the series  which shall be
         payable  upon  declaration  of  acceleration  of the  Maturity  thereof
         pursuant to Section 502;

                  (14) if the principal amount payable at the Stated Maturity of
         any Securities of the series is not determinable upon original issuance
         thereof, the amount which shall be deemed to be the principal amount of
         such  Securities  for  any  other  purpose  hereunder,   including  the
         principal  amount  thereof  which  shall  be due and  payable  upon any
         Maturity other than the Stated  Maturity or which shall be deemed to be
         Outstanding  as of any date (or, in any such case,  the manner in which
         such principal amount shall be determined);

                 (15)  the  applicability,  nonapplicability,  or variation,  of
         Sections  1006 and 1007 with respect to the  Securities of such series,
         and any addition to or change in the covenants set forth in Article Ten
         which applies to Securities of the series;

                 (16)  if applicable, that the Securities of the series shall be
         subject  to either or both of  Defeasance  or  Covenant  Defeasance  as
         provided in Article  Thirteen;  provided  that no series of  Securities
         that is convertible  into Common Stock  pursuant to Section  301(18) or
         convertible into or exchangeable  for any other securities  pursuant to
         Section  301(19)  shall be subject to  Defeasance  pursuant  to Section
         1302;

                 (17)  if and as  applicable,  that the Securities of the series
         shall be issuable in whole or in part in the form of one or more Global
         Securities  and, in such case,  the  respective  Depositaries  for such
         Global  Securities,  the form of any legend or legends  which  shall be
         borne by any such Global Security in addition to or in lieu of that set
         forth in Section 204 and any  circumstances  other than those set forth
         in Section 305 in which any such Global Security may be transferred to,
         and registered and exchanged for Securities  registered in the name of,
         a Person  other  than the  Depositary  for such  Global  Security  or a
         nominee thereof and in which any such transfer may be registered;

                 (18)  the terms and conditions,  if any,  pursuant to which the
         Securities are convertible into Common Stock of the Company pursuant to
         Article Fourteen, and any variation thereof;

                 (19)  the terms and conditions,  if any,  pursuant to which the
         Securities  are  convertible   into  or  exchangeable   for  any  other
         securities;

                 (20)  any  addition  to or  change  in the  Events  of  Default
         specified in Section 501 which applies to any Securities of the series;

                 (21)  if  other  than as  specified  in  Article  Fifteen,  the
         subordination  provisions  applicable to the  Securities of the series,
         including a different definition of "Senior Indebtedness"; and

                 (22)  any other terms of the series  (which  terms shall not be
         inconsistent with the provisions of this Indenture, except as permitted
         by Section 901(5)).

                  All  Securities  of any  one  series  shall  be  substantially
identical  except as to denomination  and except as may otherwise be provided in
or pursuant to the Board  Resolution  referred to above and  (subject to Section
303)  set  forth,  or  determined  in the  manner  provided,  in  the  Officers'
Certificate referred to above or in any such indenture supplemental hereto.

                  If any of the terms of the  series are  established  by action
taken pursuant to a Board  Resolution,  a copy of an appropriate  record of such
action  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 series.


Section 302.   Denominations.

                  The  Securities  of each  series  shall  be  issuable  only in
registered form without coupons in such  denominations  as shall be specified as
contemplated by Section 301.  In the absence of any such specified  denomination
with respect to the  Securities  of any series,  the  Securities  of such series
shall be issuable in denominations of $1,000 and any integral multiple thereof.



Section 303.   Execution, Authentication, Delivery and 
               Dating.

                  The  Securities  shall be executed on behalf of the Company by
its Chairman of the Board,  its Vice Chairman of the Board, its President or one
of its Vice Presidents,  under its corporate seal reproduced thereon attested by
its Secretary or one of its Assistant Secretaries. The signature of any of these
officers on the Securities may be manual or facsimile.

                  Securities  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.

                  At any time and from  time to time  after  the  execution  and
delivery of this  Indenture,  the Company may deliver  Securities  of any series
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.  If the form or terms of the  Securities  of the  series  have  been
established  in or pursuant to one or more Board  Resolutions  as  permitted  by
Sections 201 and 301 or pursuant to a Supplemental  Indenture, 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 Section 601) shall be fully protected in relying upon,
an Opinion of Counsel stating,

                  (1) if the form of such Securities has been  established by or
         pursuant to Board  Resolution or a Supplemental  Indenture as permitted
         by Section 201, that such form has been  established in conformity with
         the provisions of this Indenture;

                  (2) if the terms of such Securities  have been  established by
         or  pursuant  to  Board  Resolution  or  a  Supplemental  Indenture  as
         permitted  by Section  301,  that such terms have been  established  in
         conformity with the provisions of this Indenture; and

                  (3) that such Securities,  when authenticated and delivered by
         the  Trustee and issued by the Company in the manner and subject to any
         conditions specified in such Opinion of Counsel,  will constitute valid
         and  legally  binding   obligations  of  the  Company   enforceable  in
         accordance  with  their  terms,  subject  to  bankruptcy,   insolvency,
         fraudulent  transfer,  reorganization,  moratorium  and similar laws of
         general applicability relating to or affecting creditors' rights and to
         general equity principles.

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  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  Securities  of a series are not to be  originally
issued  at one  time,  it  shall  not be  necessary  to  deliver  the  Officers'
Certificate otherwise required pursuant to Section 301 or the Opinion of Counsel
otherwise required pursuant to such preceding  paragraph at or prior to the time
of  authentication  of each  Security  of such  series  if  such  documents  are
delivered at or prior to the authentication  upon original issuance of the first
Security of such series to be issued.

                  Each Security shall be dated the date of its authentication.

                  No  Security  shall be  entitled  to any  benefit  under  this
Indenture or be valid or obligatory for any purpose unless there appears on such
Security a certificate of authentication  substantially in the form provided for
herein executed by the Trustee by manual  signature,  and such  certificate upon
any Security  shall be conclusive  evidence,  and the only  evidence,  that such
Security has been duly  authenticated and delivered  hereunder.  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, 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.

                  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 and with such appropriate  insertions,  omissions,  substitutions and
other  variations as the officers  executing such  Securities may determine,  as
evidenced by their execution of such Securities.

                  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 the Company shall execute and
the Trustee  shall  authenticate  and deliver in exchange  therefor  one or more
definitive Securities of the same series, of any authorized denominations and of
a like aggregate  principal  amount and tenor.  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 and tenor.


Section 305.   Registration, Registration of 
               Transfer and Exchange.

                  The  Company  shall  cause to be kept at the  Corporate  Trust
Office of the Trustee a register (the register  maintained in such office and in
any other  office or agency of the  Company in a Place of Payment  being  herein
sometimes collectively referred to as the "Security Register") in which, subject
to such  reasonable  regulations as it may prescribe,  the Company shall provide
for the  registration of Securities and of transfers of Securities.  The Trustee
is  hereby  appointed  "Security  Registrar"  for  the  purpose  of  registering
Securities and transfers of Securities as herein provided.

                  Upon surrender for registration of transfer of any Security of
any series at the 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 Securities of the same series,  of any authorized  denominations and of like
tenor and of a like aggregate principal amount.

                  At the option of the Holder,  Securities  of any series may be
exchanged  for  other   Securities  of  the  same  series,   of  any  authorized
denominations and of like tenor and aggregate  principal amount,  upon surrender
of the  Securities  to be  exchanged  at such  office or  agency.  Whenever  any
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.

                  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 Security  presented or surrendered  for  registration of
transfer or for exchange shall be duly endorsed,  or be accompanied by a written
instrument  of transfer in form  satisfactory  to 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 or Security  Registrar 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 or
1107 not involving any transfer.

                  The Company  shall not be required (1) to issue,  register the
transfer of or exchange  Securities of any series  during a period  beginning at
the  opening of  business  15 days  before the day of the mailing of a notice of
redemption of Securities of that series  selected for  redemption  under Section
1103 and ending at the close of business on the day of such  mailing,  or (2) to
register the transfer of or exchange any Security so selected for  redemption in
whole or in part,  except the unredeemed  portion of any Security being redeemed
in part.

                  Notwithstanding  any other  provision  in this  Indenture,  no
Global Security may be transferred to, or registered or exchanged for Securities
registered in the name of, any Person other than the  Depositary for such Global
Security or any nominee thereof, and no such transfer may be registered,  unless
(1) such  Depositary  (A) notifies the Company that it is unwilling or unable to
continue as Depositary  for such Global  Security or (B) ceases to be a clearing
agency  registered under the Exchange Act, (2) the Company executes and delivers
to  the  Trustee  a  Company  Order  that  such  Global  Security  shall  be  so
transferable,   registrable  and  exchangeable,  and  such  transfers  shall  be
registrable, (3) there shall have occurred and be continuing an Event of Default
with respect to the  Securities  evidenced by such Global  Security or (4) there
shall exist such other  circumstances,  if any, as have been  specified for this
purpose as contemplated by Section 301.  Notwithstanding  any other provision in
this  Indenture,  a Global  Security to which the  restriction  set forth in the
preceding sentence shall have  ceased to apply may be  transferred  only to, and
may be registered  and exchanged for Securities  registered  only in the name or
names of, such  Person or Persons as the  Depositary  for such  Global  Security
shall have  directed and no transfer  thereof  other than such a transfer may be
registered.

                  Every Security  authenticated  and delivered upon registration
of transfer of, or in exchange for or in lieu of, a Global Security to which the
restriction  set forth in the first  sentence of the preceding  paragraph  shall
apply,  whether  pursuant to this  Section,  Section  304,  306,  906 or 1107 or
otherwise,  shall be authenticated and delivered in the form of, and shall be, a
Global Security.


Section 306.   Mutilated, Destroyed, Lost and Stolen
               Securities.                          

                  If any mutilated  Security is surrendered to the Trustee,  the
Company shall execute and the Trustee shall authenticate and deliver in exchange
therefor a new  Security  of the same  series  and of like  tenor and  principal
amount and bearing a number not contemporaneously outstanding.

                  If there shall be delivered to the Company and the Trustee (i)
evidence to their satisfaction of the destruction, loss or theft of any Security
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 notice to
the Company or the Trustee that such  Security has been  acquired by a bona fide
purchaser,  the Company  shall execute and the Trustee  shall  authenticate  and
deliver, in lieu of any such destroyed,  lost or stolen Security, a new Security
of the same series and of like tenor and  principal  amount and bearing a number
not contemporaneously outstanding.

                  In case any such mutilated, destroyed, lost or stolen Security
has become or is about to become due and payable,  the Company in its discretion
may, instead of issuing a new Security, pay such Security.

                  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  issued  pursuant  to this
Section in exchange for any mutilated Security or in lieu of any destroyed, lost
or  stolen  Security  shall  constitute  an  original   additional   contractual
obligation  of the Company,  whether or not the  mutilated,  destroyed,  lost or
stolen  Security  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 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.


Section 307.   Payment of Interest; Interest Rights
               Preserved.

                  Except as otherwise  provided as  contemplated  by Section 301
with  respect to any series of  Securities,  interest on any  Security  which 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.

                  Any  interest on any  Security of any series which 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
Holder 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  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  Security of such series and the
         date of the proposed  payment and the Special  Record Date,  and at the
         same time the Company shall deposit with the Trustee an amount of money
         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  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 Company  shall fix a Special  Record Date for the payment
         of such Defaulted Interest which shall be not 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, in the name and at the expense of
         the Company,  cause notice of the  proposed  payment of such  Defaulted
         Interest  and the  Special  Record  Date  therefor  to be given to each
         Holder of  Securities of such series in the manner set forth in Section
         106 not less than 10 days prior to such Special Record Date.  Notice of
         the proposed payment of such Defaulted  Interest and the Special Record
         Date therefor having been so mailed,  such Defaulted  Interest shall be
         paid to the  Persons in whose names the  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).

                  (2) The Company may make payment of any Defaulted  Interest on
         the   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,  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.

                  Subject  to the  provisions  of Section  1402,  in case of any
Security  which is  converted  after any Regular  Record Date on or prior to the
next succeeding Interest Payment Date, interest whose Stated Maturity is on such
Interest   Payment  Date  shall  be  payable  on  such  Interest   Payment  Date
notwithstanding  such conversion,  and such interest  (whether or not punctually
paid or duly  provided  for)  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 such Regular Record Date. Except as otherwise  expressly provided in
the  immediately  preceding  sentence  in the  case  of any  Security  which  is
converted,  interest  whose Stated  Maturity is after the date of  conversion of
such Security shall not be payable.


Section 308.   Persons Deemed Owners.

                  Prior to due  presentment  of a 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  Security is  registered as the owner of
such  Security  for the purpose of  receiving  payment of  principal  of and any
premium and (subject to Section  307) any interest on such  Security and for all
other purposes whatsoever,  whether or not such Security be overdue, and neither
the  Company,  the Trustee nor any agent of the Company or the Trustee  shall be
affected by notice to the contrary.


Section 309.   Cancellation.

                  All   Securities   surrendered   for   payment,    redemption,
registration  of transfer or exchange or  conversion  or for credit  against any
sinking fund payment shall, if surrendered to any Person other than the Trustee,
be delivered  to the Trustee and 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.  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.


Section 310.   Computation of Interest.

                  Except as otherwise  specified as  contemplated by Section 301
for Securities of any series, interest on the Securities of each series shall be
computed on the basis of a 360-day year 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 (except as to any surviving rights of conversion, registration of
transfer or exchange of  Securities  herein  expressly  provided  for),  and the
Trustee,  at the  expense  of the  Company,  shall  execute  proper  instruments
acknowledging satisfaction and discharge of this Indenture, when

                  (1)  either

                  (A) all  Securities  theretofore  authenticated  and delivered
         (other than (i) Securities  which have been  destroyed,  lost or stolen
         and which have been  replaced  or paid as  provided  in Section 306 and
         (ii) Securities 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 such Securities 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) 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 deposited
         or caused to be deposited  with the Trustee as trust funds in trust for
         the  purpose  an amount  sufficient  to pay and  discharge  the  entire
         indebtedness  on  such  Securities  not  theretofore  delivered  to the
         Trustee for cancellation, for principal and any premium and interest 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 have been complied with.

                  Notwithstanding   the   satisfaction  and  discharge  of  this
Indenture,  the obligations of the Company to the Trustee under Section 607, the
obligations of the Trustee to any Authenticating Agent under Section 614 and, if
money shall have been  deposited  with 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.


Section 402.   Application of Trust Money.

                  Subject to 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 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 any premium and
interest for whose payment such money has been deposited  with the Trustee.  All
moneys deposited with the Trustee pursuant to Section 401 (and held by it or any
Paying  Agent) for the payment of  Securities  subsequently  converted  shall be
returned to the Company upon Company Request.


                                  ARTICLE FIVE

                                    Remedies

Section 501.   Events of Default.

                  "Event of  Default",  wherever  used  herein  with  respect to
Securities of any series,  means any one of the following  events  (whatever the
reason for such  Event of Default  and  whether  it shall be  occasioned  by the
provisions of Article  Fifteen or 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 any Security
         of that series when it 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 at
         its Maturity; or

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

                  (4) failure to perform, or breach of, in any material respect,
         any covenant or warranty of the Company in this Indenture (other than a
         covenant or warranty a default in whose  performance or whose breach is
         elsewhere  in  this  Section  specifically  dealt  with  or  which  has
         expressly  been  included in this  Indenture  solely for the benefit of
         series of Securities  other than that series),  and continuance of such
         default or breach for a period of 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 25% 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 for money borrowed by the Company (including a
         default  with  respect  to  Securities  of any  series  other than that
         series) having an aggregate  principal  amount  outstanding of at least
         $20,000,000, or under any mortgage,  indenture or instrument (including
         this  Indenture)  under which there may be issued or by which there may
         be secured or  evidenced  any  indebtedness  for money  borrowed by the
         Company having an aggregate  principal  amount  outstanding of at least
         $20,000,000, whether such indebtedness now exists or shall hereafter be
         created,  which  default in either  case shall  have  resulted  in such
         indebtedness  becoming or being  declared due and payable  prior to the
         date on which it would  otherwise have become due and payable,  without
         such acceleration having been rescinded or annulled, within a period of
         30 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 25% in principal  amount of the  Outstanding
         Securities of that series a written notice  specifying such default and
         requiring  the Company to cause such  acceleration  to be  rescinded or
         annulled,  and  stating  that  such  notice is a  "Notice  of  Default"
         hereunder;  provided,  however,  that,  subject  to the  provisions  of
         Sections 601 and 602, the Trustee shall not be deemed to have knowledge
         of such default unless either (A) a Responsible  Officer of the Trustee
         shall have actual  knowledge of such  default or (B) the Trustee  shall
         have received written notice thereof from the Company, from any Holder,
         from the holder of any such  indebtedness or from the trustee under any
         such mortgage, indenture or other instrument; or

                  (6) the entry by a court having  jurisdiction  in the premises
         of (A) a decree or order for  relief in  respect  of the  Company in an
         involuntary  case or proceeding  under any applicable  Federal or State
         bankruptcy,  insolvency,  reorganization  or other similar law or (B) a
         decree or order  adjudging  the  Company a bankrupt  or  insolvent,  or
         approving  as  properly  filed  a  petition   seeking   reorganization,
         arrangement,  adjustment or composition of or in respect of the Company
         under any  applicable  Federal or State law, or appointing a custodian,
         receiver, liquidator,  assignee, trustee, sequestrator or other similar
         official of the Company or of any substantial part of its property,  or
         ordering  the  winding  up or  liquidation  of  its  affairs,  and  the
         continuance  of any such decree or order for relief  specified  in this
         clause (6) unstayed and in effect for a period of 60 consecutive  days;
         or

                  (7) the  commencement  by the Company of a  voluntary  case or
         proceeding   under  any   applicable   Federal  or  State   bankruptcy,
         insolvency, reorganization or other similar law or of any other case or
         proceeding to be adjudicated a bankrupt or insolvent, or the consent by
         it to the  entry of a decree  or order for  relief  in  respect  of the
         Company  in an  involuntary  case or  proceeding  under any  applicable
         Federal  or  State  bankruptcy,  insolvency,  reorganization  or  other
         similar law or to the commencement of any bankruptcy or insolvency case
         or  proceeding  against it, or the filing by it of a petition or answer
         or  consent  seeking  reorganization  or relief  under  any  applicable
         Federal  or State  law,  or the  consent  by it to the  filing  of such
         petition or to the appointment of or taking  possession by a custodian,
         receiver, liquidator,  assignee, trustee, sequestrator or other similar
         official of the Company or of any substantial part of its property,  or
         the making by it of an assignment for the benefit of  creditors, or the
         admission by it in writing of its inability to pay its debts  generally
         as they become due, or the taking of corporate action by the Company in
         furtherance of any such action; or

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

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, then in every such case
the  Trustee  or the  Holders  of not less than 25% in  principal  amount of the
Outstanding  Securities of that series may declare the principal  amount (or, if
any of the  Securities of that series are Original  Issue  Discount  Securities,
such portion of the principal  amount of such  Securities as may be specified in
the terms thereof) of all of 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 Holders),  and upon any such  declaration such principal amount (or specified
amount) shall 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

                           (A)  all overdue interest on all Securities
                  of that series,

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

                           (C) to the extent  that  payment of such  interest is
                  lawful,  interest  upon overdue  interest at the rate or rates
                  prescribed therefor 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  non-payment  of the principal of 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

                  (1)  default  is made in the  payment of any  interest  on any
         Security  when such  interest  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 at
         the Maturity thereof,

the Company will, upon demand of the Trustee,  pay to it, for the benefit of the
Holders  of such  Securities,  the whole  amount  then due and  payable  on such
Securities  for  principal  and any premium and interest and, to the extent that
payment of such interest shall be legally  enforceable,  interest on any overdue
principal  and  premium  and on any  overdue  interest,  at the  rate  or  rates
prescribed therefor 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 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 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 any  judicial  proceeding,  including  cases  and
proceedings  described in Sections  501(6) and (7),  relative to the Company (or
any other  obligor  upon the  Securities),  its property or its  creditors,  the
Trustee shall be entitled and empowered,  by  intervention in such proceeding or
otherwise,  to take any and all  actions in order to have  claims of the Holders
and the Trustee allowed in any such proceeding. In particular, the Trustee shall
be  authorized  to file and  prove  claims  for the whole  amount of  principal,
premium,  if any, and interest  owing and unpaid with respect to the  Securities
and all other  amounts  due under this  Indenture,  to collect  and  receive any
moneys or other  property  payable  or  deliverable  on any such  claims  and to
distribute  the same; to  participate  as a member of any committee of creditors
appointed  in the  proceedings,  as may be  necessary  or  advisable to have the
claims of the  Trustee  (including  any claim for the  reasonable  compensation,
expenses, disbursements and advances of the Trustee, its counsel and agents) and
the Holders allowed in any judicial  proceedings;  and any custodian,  receiver,
assignee,  trustee,  liquidator,  sequestrator or other similar  official in any
such  judicial  proceeding  is  hereby  authorized  by each  Holder 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 it for the  reasonable  compensation,  expenses,  disbursements  and
advances of the Trustee,  its agents and counsel,  and any other amounts due the
Trustee under Section 607.

                  No  provision of this  Indenture  shall be deemed to authorize
the  Trustee  to  authorize  or  consent  to or accept or adopt on behalf of any
Holder  any  plan of  reorganization,  arrangement,  adjustment  or  composition
affecting the Securities or the rights of any Holder thereof or to authorize the
Trustee to vote in  respect  of the claim of any Holder in any such  proceeding;
provided,  however, that the Trustee may, on behalf of the Holders, vote for the
election of a trustee in  bankruptcy  or similar  official  and be a member of a
creditors' or other similar committee.

Section 505.   Trustee May Enforce Claims Without 
               Possession of Securities.

                  All rights of action and claims  under this  Indenture  or the
Securities may be prosecuted and enforced by the Trustee  without the possession
of any of the  Securities 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 the  Securities  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 any premium or interest, upon presentation of the Securities 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 the Trustee under Section 607; and

                  SECOND:  To the payment of the amounts then due and unpaid for
         principal of and any premium and interest on the  Securities 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
         amounts  due and  payable  on such  Securities  for  principal  and any
         premium and interest, respectively.


Section 507.  Limitation on Suits.

                  No Holder of any  Security of any series  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 25% 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

                  (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 of such
Holders.


Section 508.   Unconditional Right of Holders to
               Receive Principal, Premium and Interest
               and to Convert.

                  Notwithstanding  any other  provision in this  Indenture,  but
subject to Article  Fifteen,  the Holder of any  Security  shall have the right,
which is absolute and unconditional,  to receive payment of the principal of and
any  premium  and  (subject to Section  307)  interest  on such  Security on the
respective  Stated  Maturities  expressed in such  Security  (or, in the case of
redemption,  on the Redemption  Date) and to convert such Security in accordance
with  Article  Fourteen and to institute  suit for the  enforcement  of any such
payment and right to convert,  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 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,  subject to any
determination in such proceeding, the Company, the Trustee and the Holders shall
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  in the last
paragraph of Section 306, no right or remedy herein  conferred  upon or reserved
to the Trustee or to the Holders 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
Securities  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,
as the case may be.


Section 512.  Control by Holders.

                  The  Holders  of  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, and

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


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 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 any
         premium or interest on any Security of such series, 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  Inden-  ture;  but no such  waiver  shall  extend to any
subsequent or other default or impair any right consequent thereon.


Section 514.  Undertaking for Costs.

                  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,
suffered or omitted by it as Trustee,  a court may require any party litigant in
such suit to file an  undertaking  to pay the costs of such suit, and may assess
costs against any such party litigant,  in the manner and to the extent provided
in the Trust  Indenture  Act;  provided  that neither this Section nor the Trust
Indenture  Act  shall be  deemed  to  authorize  any  court to  require  such an
undertaking or to make such an assessment in any suit  instituted by the Trustee
or in any suit for the  enforcement  of the right to  convert  any  Security  in
accordance with Article Fourteen.


Section 515.  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.


                                  ARTICLE SIX

                                  The Trustee

Section 601.  Certain Duties and Responsibilities.

                  The duties and  responsibilities  of the  Trustee  shall be as
provided by the Trust Indenture Act. Notwithstanding the foregoing, no provision
of this  Indenture  shall require the Trustee 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,  if it shall have
reasonable  grounds  for  believing  that  repayment  of such funds or  adequate
indemnity  against  such risk or  liability  is not  reasonably  assured  to it.
Whether or not therein expressly so provided,  every provision of this Indenture
relating to the conduct or affecting the liability of or affording protection to
the Trustee shall be subject to the provisions of this Section.


Section 602.  Notice of Defaults.

                  If a  default  known  to the  Trustee  occurs  hereunder  with
respect to  Securities  of any  series,  the  Trustee  shall give the Holders of
Securities of such series  notice of such default as and to the extent  provided
by the Trust Indenture Act; provided,  however,  that in the case of any default
of the character  specified in Section 501(4) with respect to Securities of such
series,  no such  notice to Holders  shall be given until at least 30 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 Securities of such series.


Section 603.  Certain Rights of Trustee.

                  Subject to the provisions of Section 601:

                  (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, other evidence of indebtedness 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
         and any  resolution  of the Board of  Directors  shall 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  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 written
         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  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, other evidence of indebtedness
         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; and

                  (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.


Section 604.  Not Responsible for Recitals or 
              Issuance of Securities.        

                  The recitals  contained  herein and in the Securities,  except
the Trustee's  certificates of authentication,  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.  Neither the
Trustee  nor  any  Authenticating  Agent  shall  be  accountable  for the use or
application by the Company of Securities or the proceeds thereof.


Section 605.  May Hold Securities.

                  The Trustee,  any Authenticating  Agent, any Paying Agent, any
Security  Registrar or any other agent of the Company,  in its individual or any
other capacity,  may become the owner or pledgee of Securities  and,  subject to
Sections 608 and 613, may  otherwise  deal with the Company with the same rights
it would  have if it were  not  Trustee,  Authenticating  Agent,  Paying  Agent,
Security Registrar or such other agent.


Section 606.  Money Held in Trust.

                  Money  held  by  the  Trustee  in  trust   hereunder  must  be
segregated  from  other  funds.  The  Trustee  shall be under no  liability  for
interest on any money received by it hereunder  except as otherwise  agreed with
the Company.

Section 607.  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 promptly
         reimburse  the Trustee  upon its request for all  reasonable  expenses,
         disbursements   and  advances  incurred  or  made  by  the  Trustee  in
         administration of the trusts set forth in 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  the  Trustee  for,  and to hold it harmless
         against,  any loss, liability or expense incurred without negligence or
         bad  faith  on its  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.


Section 608.  Disqualification; Conflicting 
              Interests.

                  If the Trustee  has or shall  acquire a  conflicting  interest
within  the  meaning  of the Trust  Indenture  Act,  the  Trustee  shall  either
eliminate such interest or resign,  to the extent and in the manner provided by,
and subject to the provisions of, the Trust Indenture Act and this Indenture. To
the extent  permitted  by such Act,  the  Trustee  shall not be deemed to have a
conflicting interest by virtue of being a trustee under the Indenture,  dated as
of December 15, 1991 relating to the Company's 12% Senior Subordinated Notes due
December 15, 2001 and the Indenture dated as of January 15, 1992 relating to the
Company's 11 1/2% Senior Subordinated Notes due January 15, 2002.


Section 609.  Corporate Trustee Required;
              Eligibility.               

                  There  shall at all  times be one or more  Trustees  hereunder
with respect to the Securities of each series,  at least one of which shall be a
Person that is eligible  pursuant to the Trust  Indenture Act to act as such and
has a combined  capital  and  surplus of at least  $50,000,000.  If such  Person
publishes  reports of  condition  at least  annually,  pursuant to law or to the
requirements of said supervising or examining  authority,  then for the purposes
of this  Section and to the extent  permitted  by the Trust  Indenture  Act, the
combined  capital and surplus of such Person  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  with  respect to the  Securities  of any
series  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 610.  Resignation and Removal; 
              Appointment of Successor.

                  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 611.

                  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 the  instrument of acceptance  by a successor  Trustee  required by
Section 611 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 with
respect to the Securities of such series.

                  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.

                  If at any time:

                  (1) the Trustee  shall fail to comply  with  Section 608 after
         written request therefor by the Company or by any Holder 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 609
         and shall fail to resign after written request  therefor by the Company
         or by any such Holder, 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,  (A) the Company by a Board  Resolution  may remove the
Trustee  with  respect to all  Securities,  or (B) subject to Section  514,  any
Holder  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.

                  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 cause, with
respect  to the  Securities  of one or  more  series,  the  Company,  by 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) and shall comply with the
applicable  requirements  of  Section  611.  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  in  accordance  with  the  applicable   requirements  of
Section 611, 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
shall  have  been so  appointed  by the  Company  or the  Holders  and  accepted
appointment  in the manner  required by  Section 611,  any Holder 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 the Securities of such series.

                  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
to all Holders of  Securities  of such series in the manner  provided 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 611.  Acceptance of Appointment by Successor.                  

                  In case of the  appointment  hereunder of a successor  Trustee
with respect to all Securities,  every such successor Trustee so appointed 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, on the 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.

                  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
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.

                  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 the first or second preceding paragraph, as the case may be.

                  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 612.   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  resulting
from any merger,  conversion  or  consolidation  to which the Trustee shall be a
party, or any corporation  succeeding to all or substantially  all 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  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 so authenticated  with the same
effect as if such successor Trustee had itself authenticated such Securities.


Section 613.   Preferential Collection of Claims Against Company.      

                  If and when the  Trustee  shall be or become a creditor of the
Company (or any other obligor upon the Securities), the Trustee shall be subject
to the provisions of the Trust  Indenture Act regarding the collection of claims
against the Company (or any such other obligor).


Section 614.  Appointment of Authenticating Agent.

                  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
original issue and upon exchange,  registration of transfer,  partial conversion
or partial  redemption  thereof or pursuant to Section  306, 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.  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 shall at all
times be a corporation organized and doing business under the laws of the United
States of America,  any State  thereof 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 authority. If such Authenticating Agent publishes reports of
condition  at least  annually,  pursuant to law or to the  requirements  of said
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. If 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 any further act on the part of the Trustee or the Authenticating Agent.

                  An  Authenticating  Agent  may  resign  at any time by  giving
written notice thereof to the Trustee and to the Company. The Trustee may at any
time  terminate the agency of an  Authenticating  Agent by giving written notice
thereof 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 may appoint a successor  Authenticating
Agent  which  shall be  acceptable  to the Company and shall give notice of such
appointment  in the manner  provided in Section 106 to all Holders of Securities
of the series with respect to which such  Authenticating  Agent will serve.  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.
No successor  Authenticating  Agent shall be appointed unless eligible under the
provisions of this Section.

                  The Trustee  agrees to pay to each  Authenticating  Agent from
time to time reasonable  compensation  for its services under this Section,  and
the Trustee shall be entitled to be reimbursed for such payments, subject to the
provisions of Section 607.

                  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  the  Trustee's  certificate  of  authentication,  an
alternative certificate of authentication 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.  Company to Furnish Trustee
                      Names and Addresses of Holders.

                  The Company will furnish or cause to be furnished
to the Trustee

                  (1)  semi-annually,  not more than 15 days  after the  Regular
         Record Date 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 Securities of such series as of the Regular Record Date, and

                  (2) 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;

excluding from any such list names and addresses  received by the Trustee in its
capacity as Security Registrar.




Section 702.  Preservation of Information; Communications to Holders.  

                  The  Trustee  shall  preserve,  in as  current  a  form  as is
reasonably practicable, the names and addresses of Holders contained in the most
recent  list  furnished  to the Trustee as provided in Section 701 and the names
and  addresses  of Holders  received by the Trustee in its  capacity as Security
Registrar.  The  Trustee may  destroy  any list  furnished  to it as provided in
Section 701 upon receipt of a new list so furnished.

                  The rights of the Holders to  communicate  with other  Holders
with respect to their rights under this Indenture or under the  Securities,  and
the corresponding rights and privileges of the Trustee,  shall be as provided by
the Trust Indenture Act.

                  Every Holder of Securities, by receiving and holding the same,
agrees with the Company and the Trustee that neither the Company nor the Trustee
nor any  agent of  either  of them  shall be held  accountable  by reason of any
disclosure of  information as to names and addresses of Holders made pursuant to
the Trust Indenture Act.


Section 703.  Reports by Trustee.

                  The Trustee shall transmit to Holders such reports  concerning
the Trustee and its actions under this Indenture as may be required  pursuant to
the  Trust  Indenture  Act at the  times  and in the  manner  provided  pursuant
thereto.

                  A copy  of  each  such  report  shall,  at the  time  of  such
transmission  to Holders,  be filed by the Trustee with each stock exchange upon
which any Securities are listed,  with the Commission and with the Company.  The
Company  will notify the  Trustee  when any  Securities  are listed on any stock
exchange.


Section 704.  Reports by Company.

                  The Company  shall file with the  Trustee and the  Commission,
and transmit to Holders, such information, documents and other reports, and such
summaries thereof, as may be required pursuant to the Trust Indenture Act at the
times and in the manner  provided  pursuant to such Act;  provided that any such
information,  documents  or reports  required  to be filed  with the  Commission
pursuant  to Section   13 or 15(d) of the  Exchange  Act shall be filed with the
Trustee  within  15 days  after  the same is so  required  to be filed  with the
Commission.


                                 ARTICLE EIGHT

            Consolidation, Merger, Conveyance, Transfer or Lease

Section 801.  Company May Consolidate, Etc., Only on Certain Terms.  

                  The Company shall not consolidate with or merge into any other
Person or convey,  transfer or lease its properties and assets  substantially as
an  entirety  to any  Person,  and the  Company  shall not  permit any Person to
consolidate  with or merge into the  Company or  convey,  transfer  or lease its
properties and assets substantially as an entirety to the Company, unless:

                  (1) in case the Company shall  consolidate  with or merge into
         another  Person or convey,  transfer or lease its properties and assets
         substantially  as an entirety to any Person,  the Person formed by such
         consolidation  or into which the Company is merged or the Person  which
         acquires by conveyance or transfer, or which leases, the properties and
         assets of the  Company  substantially  as an entirety  shall  expressly
         assume, by an indenture supplemental hereto,  executed and delivered to
         the Trustee, in form satisfactory to the Trustee,  the due and punctual
         payment of the  principal  of and any premium  and  interest on all the
         Securities and the  performance or observance of every covenant of this
         Indenture  on the part of the Company to be  performed  or observed and
         shall have provided for  conversion  rights in accordance  with Section
         1411 with  respect to each  series of  Securities  afforded  conversion
         rights thereunder;

                  (2)  immediately  after giving effect to such  transaction and
         treating any indebtedness which becomes an obligation of the Company or
         any Subsidiary as a result of such  transaction 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 lapse of time or
         both,  would  become an Event of Default,  shall have  happened  and be
         continuing;

                  (3) if,  as a result  of any such  consolidation  or merger or
         such conveyance, transfer or lease, properties or assets of the Company
         would become subject to a mortgage,  pledge, lien, security interest or
         other encumbrance  which would not be permitted by this Indenture,  the
         Company or such successor  Person,  as the case may be, shall take such
         steps  as shall be  necessary  effectively  to  secure  the  Securities
         equally  and  ratably  with or prior to, if  required  pursuant to this
         Indenture, all indebtedness secured thereby; and

                  (4) the Company  has  delivered  to the  Trustee an  Officers'
         Certificate  and  an  Opinion  of  Counsel,   each  stating  that  such
         consolidation,   merger,  conveyance,  transfer  or  lease  and,  if  a
         supplemental indenture is required in connection with such transaction,
         such  supplemental  indenture  comply  with this  Article  and that all
         conditions  precedent  herein provided for relating to such transaction
         have been complied with.


Section 802.  Successor Substituted.

                  Upon any  consolidation  of the Company with, or merger of the
Company  into,  any other  Person or any  conveyance,  transfer  or lease of the
properties and assets of the Company  substantially as an entirety in accordance
with Section 801, the  successor  Person  formed by such  consolidation  or into
which the  Company is merged or to which such  conveyance,  transfer or lease is
made shall succeed to, and be substituted  for, and may exercise every right and
power of, the  Company  under  this  Indenture  with the same  effect as if such
successor  Person had been  named as the  Company  herein,  and  thereafter  the
predecessor Person shall be relieved of all obligations and covenants under this
Indenture and the Securities.


                                  ARTICLE NINE

                            Supplemental Indentures

Section 901.  Supplemental Indentures Without Consent of Holders.            

                  Without  the  consent  of  any  Holders,  the  Company,   when
authorized by 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; 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  (and if such
         additional Events of Default are to be for the benefit of less than all
         series of Securities,  stating that such  additional  Events of Default
         are expressly being included solely for the benefit of such series); or

                  (4)  to add  to or  change  any  of  the  provisions  of  this
         Indenture to such extent as shall be necessary to permit or  facilitate
         the  issuance  of  Securities  in  bearer  form,   registrable  or  not
         registrable as to principal,  and with or without interest coupons,  or
         to permit or facilitate  the issuance of  Securities in  uncertificated
         form; or

                  (5) to add to,  change or eliminate  any of the  provisions of
         this Indenture in respect of one or more series of Securities, provided
         that any such  addition,  change or  elimination  (A) shall neither (i)
         apply to any Security of any series  created  prior to the execution of
         such  supplemental  indenture  and  entitled  to the  benefit  of  such
         provision nor (ii) modify the rights of the Holder of any such Security
         with respect to such provision or (B) shall become  effective only when
         there is no such Security Outstanding; or

                  (6) to secure the Securities  pursuant to the  requirements of
         Article Ten or otherwise; or

                  (7) to establish the form or terms of Securities of any series
         as permitted by Sections 201 and 301; 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,
         pursuant to the requirements of Section 611; or

                  (9) to make provision with respect to the conversion rights of
         Holders pursuant to the requirements of Article Fourteen; or

                  (10) 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,  provided that such
         action  pursuant  to this clause  (10) shall not  adversely  affect the
         interests  of the Holders of  Securities  of any series 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 the Outstanding  Securities of each series affected by such
supplemental  indenture, by Act of said Holders delivered to the Company and the
Trustee, the Company, when authorized by 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 of such series 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 any
         instalment of principal of or interest on, any Security,  or reduce the
         principal amount thereof or the rate of interest thereon or any premium
         payable  upon the  redemption  thereof,  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 change any Place of Payment  where,  or the
         coin or  currency  in which,  any  Security  or any premium or 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,  on or after the Redemption  Date),  or
         modify  the right to  convert  any  Security  as  provided  in  Article
         Fourteen in a manner  adverse to the Holders,  or modify the provisions
         of this Indenture with respect to the  subordination  of the Securities
         in a manner adverse to the Holders, or

                  (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  (of  compliance  with  certain
         provisions of this  Indenture or certain  defaults  hereunder and their
         consequences) provided for in this Indenture, or

                  (3) modify any of the provisions of this Section,  Section 513
         or Section 1009, except to increase any such percentage.

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.

                  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.


Section 903.  Execution of Supplemental Indentures.

                  In executing,  or accepting the additional  trusts created by,
any  supplemental  indenture  permitted  by this  Article  or the  modifications
thereby of the trusts created by this  Indenture,  the Trustee shall be entitled
to receive,  and  (subject to Section  601) 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 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.


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 and Interest.

                  The  Company  covenants  and  agrees  for the  benefit of each
series of Securities  that it will duly and  punctually pay the principal of and
any premium and interest on the Securities of that series in accordance with the
terms of the Securities and this Indenture.


Section 1002.  Maintenance of Office or Agency.

                  The  Company  will  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,  where  Securities of that series may be
surrendered for  registration of transfer or exchange,  where  Securities may be
surrendered  for conversion 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 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, and the Company hereby appoints the Trustee as its agent to receive all
such presentations, surrenders, notices and demands.

                  The Company may also 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 such purposes and may from time to time
rescind  such  designations;  provided,  however,  that no such  designation  or
rescission shall in any manner relieve the Company of its obligation to maintain
an office or agency in each Place of Payment  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.


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 Securities, it will, on or before each due date of
the  principal  of or any premium or interest on any of the  Securities  of that
series,  segregate  and hold in trust for the  benefit of the  Persons  entitled
thereto a sum  sufficient  to pay the  principal and any premium and interest 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, it will, on or prior to each due date of the principal
of or any premium or interest on any  Securities of that series,  deposit with a
Paying  Agent  a sum  sufficient  to pay  such  amount,  such  sum to be held as
provided  by the Trust  Indenture  Act,  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 for any series of
Securities  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) comply with the
provisions of the Trust Indenture Act applicable to it as a Paying Agent and (2)
during the  continuance of any default by the Company (or any other obligor upon
the  Securities  of that  series) in the making of any payment in respect of the
Securities  of that  series,  and  upon  the  written  request  of the  Trustee,
forthwith  pay to the Trustee  all sums held in trust by such  Paying  Agent for
payment in respect of the Securities of that series.

                  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 money.

                  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 or any
premium or interest on any Security of any series and  remaining  unclaimed  for
two years after such  principal,  premium or interest has become due and payable
shall  be paid to the  Company  on  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  thereof,  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 a newspaper  published in
the English language,  customarily published on each Business Day and of general
circulation  in the  Borough  of  Manhattan,  The City of New  York,  or mail to
Holders  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 or mailing,  any unclaimed balance of such money then remaining will
be repaid to the Company.


Section 1004.  Statement by Officers as to Default.

                  The Company shall file with the Trustee, within 120 days after
the end of each fiscal year (which as of the date hereof is December  31) of the
Company ending after the date hereof,  an Officers'  Certificate,  signed by its
principal executive officer, principal financial officer or principal accounting
officer and by the treasurer or any assistant  treasurer or director of treasury
or by the secretary or any assistant  secretary of the Company,  stating that in
the  course of the  performance  of their  duties as such  officers  they  would
normally  obtain  knowledge  of any  action or failure to act on the part of the
Company  in  violation  of  any  covenant,  agreement,  provision  or  condition
contained in this Indenture, stating whether or not they have obtained knowledge
of any action or failure to act on the part of the Company  (determined  without
regard  for any period of grace or  requirement  of notice  provided  hereunder)
during the  twelve-months'  period ending on the last day of the previous fiscal
year in violation of any covenant,  agreement,  provision or condition contained
in this Indenture and, if so,  specifying each such default of which the signers
may have  knowledge and the nature thereof and what action the Company has taken
or  proposes  to take with  respect  thereto.  Such  statement  need not include
reference  to any  default  which has been fully  cured  prior to the date as of
which such statement speaks. The Officers' Certificate shall also include a list
of all  resolutions of the Board of Directors  filed with the Trustee during the
twelve-months' period covered by such statement.


Section 1005.  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  (charter and statutory) and franchises;  provided,  however,
that the Company  shall not be required to preserve  any such right or franchise
if the Board of Directors  shall determine that the  preservation  thereof is no
longer desirable in the conduct of the business of the Company and that the loss
thereof is not disadvantageous in any material respect to the Holders.

Section 1006.  Limitation on Liens.

         The Company covenants and agrees, solely for the benefit of each series
of  Securities  which are provided to be entitled to the benefit of this Section
1006  pursuant to Section 301,  that the Company  will not itself,  and will not
permit any Subsidiary to, incur,  issue,  assume or guarantee any notes,  bonds,
debentures or other similar evidences of indebtedness for money borrowed (notes,
bonds,  debentures or other similar evidences of indebtedness for money borrowed
being hereinafter  referred to as "Debt") which is pari passu or (by the express
terms  of  such  Debt  or the  instrument  creating  or  evidencing  such  Debt)
subordinated  in right of  payment  to the  Securities,  secured  after the date
hereof by pledge of, or mortgage or other lien on, any Principal Property of the
Company  or any  Significant  Subsidiary,  or any shares of stock or Debt of any
Significant Subsidiary (pledges,  mortgages and other liens being hereinafter in
this Article Ten referred to as "Mortgage" or "Mortgages"),  without effectively
providing  that the  Securities  of all series  entitled  to the benefit of this
Section 1006 (together  with, if the Company shall so determine,  any other Debt
of the  Company or such  Significant  Subsidiary  then  existing  or  thereafter
created which is not subordinate to the Securities) shall be secured (i) equally
and ratably with (or, at the option of the Company,  prior to) such secured Debt
or (ii) in the event such secured Debt is subordinate in right of payment to the
Securities,  prior to such secured Debt,  for so long as such secured Debt shall
be so secured,  unless after giving  effect  thereto,  the  aggregate  principal
amount of all such  secured  Debt then  outstanding  which  would  otherwise  be
prohibited would not exceed 10% of Consolidated Assets; provided,  however, that
this Section  1006 shall not apply to, and there shall be excluded  from secured
Debt in any computation  under this Section 1006, Debt secured prior to the date
of this Indenture and Debt secured by:

                  (1)  Mortgages  on  property  of, or on any shares of stock or
         Debt of, any corporation  existing at the time such corporation becomes
         a Significant Subsidiary;

                  (2)  Mortgages  in favor  of the  Company  or any  Significant
         Subsidiary;

                  (3)  Mortgages in favor of the United States of America or any
         State  thereof,  or  any  department,   agency  or  instrumentality  or
         political  subdivision  of the  United  States of  America or any State
         thereof, or in favor of any other country, or any political subdivision
         thereof,  to  secure  partial,  progress,  advance  or  other  payments
         pursuant  to  any  contract  or  statute,   or  Mortgages   for  taxes,
         assessments  or  governmental  charges or levies,  in each case (i) not
         then due and  delinquent  after giving effect to any  applicable  grace
         period or (ii) the  validity of which is being  contested in good faith
         by appropriate proceedings; and materialmen's,  mechanics',  carriers',
         workmen's, repairmen's, landlord's or other like Mortgages, or deposits
         to obtain the release of such Mortgages;

                  (4) Mortgages on property,  equipment, mines or facilities, or
         shares of stock or Debt,  to secure  the  payment of all or any part of
         the  purchase  price  thereof  or  the  construction,   improvement  or
         development cost thereof, or any Debt incurred in connection therewith,
         existing  prior  to,  at the time of, or  within  180 days  after,  the
         acquisition (including any acquisition through merger or consolidation)
         or construction,  improvement or development thereof, provided that any
         such Mortgages shall only extend to the property,  equipment,  mines or
         facilities,  or  shares  of  stock or Debt,  acquired  or  constructed,
         improved or developed,  or to property or mines,  including undeveloped
         mineralized  deposits or  orebodies or segments  thereof,  on which the
         acquired or  constructed,  improved or developed  property,  equipment,
         mines or facilities is situated;

                  (5)  Mortgages   securing   obligations  issued  by  a  State,
         territory  or  possession  of the  United  States  of  America,  or any
         political  subdivision  of  any  of  the  foregoing,   to  finance  the
         acquisition or construction  of property,  and on which the interest is
         not,  in the  opinion  of tax  counsel  of  recognized  standing  or in
         accordance  with a  ruling  issued  by the  Internal  Revenue  Service,
         includible in gross income of the holder by reason of Section 103(a) of
         the Internal  Revenue Code (or any  successor to such  provision) as in
         effect  at the time of the  issuance  of such  obligations,  including,
         without limitation,  Debt related to the financing of pollution control
         or other equipment or facilities  financed by State or local government
         units;

                  (6) Mortgages  created in connection with a project  financed,
         or assets acquired, with, and created to secure,  indebtedness or lease
         payment  obligations  substantially  related  to and  entered  into  or
         effective  before,  at  the  time  of  or  after  (i)  the  acquisition
         (including any acquisition by merger or consolidation) of properties or
         assets not currently owned by the


         Company or any of its Significant Subsidiaries or (ii) the financing of
         the acquisition,  construction, development or improvement of property,
         equipment, mines or facilities of the Company or any of its Significant
         Subsidiaries, as to which the obligee with respect to such indebtedness
         or  obligation  has no recourse to the general  corporate  funds of the
         Company or any of its  Significant  Subsidiaries  or to the assets,  in
         general, of the Company or any of its Significant  Subsidiaries,  other
         than  the  property,   equipment,   mines  or  facilities  acquired  or
         constructed,  improved or developed, or to property or mines, including
         undeveloped  mineralized  deposits or orebodies or segments thereof, on
         which the  acquired or  constructed,  improved or  developed  property,
         equipment,  mines or  facilities  is situated  or that forms,  with the
         property,  equipment,  mines or  facilities  acquired  or  constructed,
         improved or developed,  an integrated plan to bring into or enhance the
         production of minerals or metals therefrom (such  indebtedness or lease
         payment  obligations  being hereinafter in this Article Ten referred to
         as "Nonrecourse Obligations");

                  (7)  Production  payments or other related rights of others to
         the output of mines, refineries,  smelters, concentrators or production
         facilities,  including project financings, with respect to any property
         or assets acquired,  constructed,  developed or improved by the Company
         or a  Subsidiary  with the  proceeds  of such  project  financings;  or
         Mortgages  to secure  payment of  workmen's  compensation  or to secure
         performance in connection with tenders,  leases of real property,  bids
         or  contracts  to secure  (or in lieu  of)surety  or  appeal  bonds and
         Mortgages made in the ordinary course of business for similar purposes;
         and

                  (8) Any  extension,  renewal,  refunding  or  replacement  (or
         successive  extensions,  renewals,  refundings or  replacements),  as a
         whole or in part, of any Mortgage  referred to in the foregoing clauses
         (1) to (7),  inclusive;  provided,  however,  that (i) such  extension,
         renewal, refunding or replacement Mortgage shall be limited to all or a
         part of the same  property,  shares of stock or Debt that  secured  the
         Mortgage extended,  renewed, refunded or replaced (plus improvements on
         such  property) and (ii) the Debt secured by such Mortgage at such time
         is not increased.

Section 1007.  Limitation on Certain Debt.

         The Company covenants and agrees, solely for the benefit of each series
of  Securities  which are provided to be entitled to the benefit of this Section
1007  pursuant to Section 301, that the Company will not incur any Debt which by
its  terms  is  both  (i)  subordinated  in  right  of  payment  to  any  Senior
Indebtedness and (ii) senior in right of payment to the Securities.


Section 1008.  Provision of Financial Information.

                  So long as  Securities  of any  series  are  Outstanding,  the
Company will provide to the Trustee a copy of all the annual reports,  quarterly
reports  and other  documents  which the  Company is  required  to file with the
Commission  pursuant to Section  13(a) or 15(d) of the Exchange Act, as amended,
or any successor provision thereto. If, during any reporting period, the Company
is not  required to file such  reports  with the  Commission,  the Company  will
provide to the Trustee  substantially  similar financial reports  concerning the
Company as if the Company were so required.


Section 1009.  Waiver of Certain Covenants.

                  Except as otherwise  specified as  contemplated by Section 301
for  Securities of such series,  the Company may, with respect to the Securities
of any  series,  omit in any  particular  instance  to  comply  with  any  term,
provision or condition  set forth in any covenant  provided  pursuant to Section
301(15), 301(22), 901(2) or 901(7) for the benefit of the Holders of such series
or in any of  Sections  1005 to 1008,  inclusive,  if  before  the time for such
compliance  the  Holders  of at least a  majority  in  principal  amount  of the
Outstanding  Securities  of such series shall,  by Act of such  Holders,  either
waive such compliance in such instance or generally  waive  compliance with such
term, provision or condition,  but no such waiver shall extend to or affect such
term,  provision 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 such  Securities) 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 a Board  Resolution or in another manner  specified as contemplated
by Section 301 for such Securities. In case of any redemption at the election of
the Company of less than all the Securities of any series, the Company shall, at
least 60 days  prior to the  Redemption  Date  fixed by the  Company  (unless  a
shorter  notice shall be  satisfactory  to the Trustee as providing  the Trustee
sufficient time to make any necessary  arrangements for the redemption),  notify
the Trustee of such  Redemption  Date, of the principal  amount of Securities of
such series to be redeemed and, if applicable, of the tenor of the Securities to
be redeemed. In the case of any redemption of Securities prior to the expiration
of any restriction on such  redemption  provided in the 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  are to be
redeemed  (unless all of the Securities of such series and of a specified  tenor
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 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. If less than
all of  the  Securities  of  such  series  and of a  specified  tenor  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  and  specified  tenor  not  previously  called  for
redemption in accordance with the preceding sentence.

         If any Security  selected for partial  redemption  is converted in part
before  termination of the  conversion  right with respect to the portion of the
Security so selected, the converted portion of such Security shall be deemed (so
far as may be) to be the portion selected for redemption.  Securities which have
been converted  during a selection of Securities to be redeemed shall be treated
by the Trustee as Outstanding for the purpose of such selection.

                  The Trustee  shall  promptly  notify the Company 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 Securities  redeemed or to be redeemed only in
part, to the portion of the principal  amount of such Securities  which has been
or is to be redeemed.


Section 1104.  Notice of Redemption.

                  Notice  of  redemption  shall be given  by  first-class  mail,
postage  prepaid,  mailed  not less than 30 nor more  than 60 days  prior to the
Redemption  Date, to each Holder of  Securities  to be redeemed,  at his address
appearing in the Security Register.

                  All notices of redemption shall state:

                  (1)  the Redemption Date,

                  (2)  the Redemption Price,

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

                  (4) that on the  Redemption  Date the  Redemption  Price  will
         become due and payable upon each such  Security to be redeemed  and, if
         applicable,  that  interest  thereon  will cease to accrue on and after
         said date,

                  (5) in  the  case  of  any  Securities  that  are  convertible
         pursuant to Article Fourteen, the conversion price or rate, the date on
         which  the right to  convert  the  principal  of the  Securities  to be
         redeemed will  terminate and the place or places where such  Securities
         may be surrendered for conversion,

                  (6)  the place or places where such Securities are
         to be surrendered for payment of the Redemption Price,
         and

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

                  Notice of  redemption  of  Securities  to be  redeemed  at the
election  of the  Company  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 and shall
be irrevocable.


Section 1105.  Deposit of Redemption Price.

                  On or prior to 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, segregate and hold in trust as provided in Section 1003) an amount
of  money  sufficient  to pay  the  Redemption  Price  of,  and  (except  if the
Redemption Date shall be an Interest  Payment Date) accrued interest on, all the
Securities  which are to be  redeemed  on that date  other  than any  Securities
called for redemption on that date which have been  converted  prior to the date
of such deposit.

                  If any Security called for redemption is converted,  any money
deposited with the Trustee or with any Paying Agent or so segregated and held in
trust for the  redemption  of such Security  shall  (subject to any right of the
Holder of such  Security  or any  Predecessor  Security  to receive  interest as
provided  in the last  paragraph  of Section  307) be paid to the  Company  upon
Company  Request or, if then held by the Company,  shall be discharged from such
trust.


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,  and from and after such date
(unless the Company  shall  default in the payment of the  Redemption  Price and
accrued  interest) such Securities shall cease to bear interest.  Upon surrender
of any such  Security  for  redemption  in  accordance  with said  notice,  such
Security  shall be paid by the Company at the  Redemption  Price,  together with
accrued  interest  to the  Redemption  Date;  provided,  however,  that,  unless
otherwise  specified as  contemplated  by Section 301,  installments of interest
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  Securities,
registered as such at the close of business on the relevant Regular Record Dates
according to their terms and the provisions of Section 307.

                  If any  Security  called for  redemption  shall not be so paid
upon  surrender  thereof for  redemption,  the principal and any premium  shall,
until  paid,  bear  interest  from the  Redemption  Date at the rate  prescribed
therefor in the Security.


Section 1107.  Securities Redeemed in Part.

                  Any  Security  which is to be  redeemed  only in part 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 and of
like tenor,  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  Securities  of any  series  is  herein  referred  to as an
"optional  sinking fund payment".  If provided for by the terms of Securities of
any  series,  the cash  amount of any  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 (1) may deliver Outstanding Securities of a series
(other than any previously  called for redemption) and (2) may apply as a credit
Securities of a series which have been converted pursuant to Article Fourteen or
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,  in each case in
satisfaction  of all or any part of any sinking fund payment with respect to the
Securities  of such  series  required  to be made  pursuant to the terms of such
Securities  as  provided  for by the terms of such  series;  provided  that such
Securities  have not been  previously  so  credited.  Such  Securities  shall be
received and credited  for such purpose by the Trustee at the  Redemption  Price
specified in such  Securities  for redemption  through  operation of the sinking
fund and the amount of such 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 any  series of  Securities,  the  Company  will  deliver  to the  Trustee an
Officers'  Certificate  specifying  the amount of the next ensuing  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 and the portion
thereof, if any, which is to be satisfied by delivering and crediting Securities
of that series pursuant to Section 1202 and will also deliver to the Trustee any
Securities  to be so  delivered.  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


                       Defeasance and Covenant Defeasance

Section 1301.  Company's Option to Effect Defeasance or Covenant Defeasance.

                  The Company may elect,  at its option by Board  Resolution  at
any time, to have either Section 1302 or Section 1303 applied to the Outstanding
Securities of any series designated  pursuant to Section 301 as being defeasible
pursuant to this Article Thirteen  (hereinafter  called a "Defeasible  Series"),
upon  compliance  with the conditions  set forth below in this Article  Thirteen
provided that Section 1302 shall not apply to any series of  Securities  that is
convertible into Common Stock pursuant to Section 301(18) or convertible into or
exchangeable for any other securities pursuant to Section 301(19).


Section 1302.  Defeasance and Discharge.

                  Upon the Company's  exercise of the option provided in Section
1301 to have this  Section  1302 applied to the  Outstanding  Securities  of any
Defeasible  Series and subject to the proviso to Section 1301, the Company shall
be deemed to have been  discharged  from its  obligations  with  respect  to the
Outstanding  Securities  of such series as provided in this Section on and after
the date the  conditions  set forth in Section 1304 are  satisfied  (hereinafter
called  "Defeasance").  For this purpose, such Defeasance means that the Company
shall be deemed to have paid and discharged the entire indebtedness  represented
by the Outstanding Securities of such series and to have satisfied all its other
obligations  under the Securities of such series and this  Indenture  insofar as
the Securities of such series are concerned (and the Trustee,  at the expense of
the Company,  shall  execute  proper  instruments  provided to it by the Company
acknowledging  the same),  subject to the  following  which shall  survive until
otherwise  terminated  or  discharged  hereunder:  (1) the  rights of Holders of
Securities  of such series to receive,  solely from the trust fund  described in
Section 1304 and as more fully set forth in such Section, payments in respect of
the principal of and any premium and interest on such  Securities of such series
when  payments  are due,  (2) the  Company's  obligations  with  respect  to the
Securities of such series under  Sections 304, 305, 306, 1002 and 1003,  (3) the
rights,  powers,  trusts, duties and immunities of the Trustee hereunder and (4)
this Article  Thirteen.  Subject to compliance with this Article  Thirteen,  the
Company may  exercise  its option  provided in Section 1301 to have this Section
1302  applied  to  the   Outstanding   Securities  of  any   Defeasible   Series
notwithstanding  the prior  exercise of its option  provided in Section  1301 to
have Section 1303 applied to the Outstanding Securities of such series.


Section 1303.  Covenant Defeasance.

                  Upon the Company's  exercise of the option provided in Section
1301 to have this  Section  1303 applied to the  Outstanding  Securities  of any
Defeasible  Series, (1) the Company shall be released from its obligations under
Sections 1005 through 1008,  inclusive,  and Section 801, and (2) the occurrence
of any event  specified  in  Sections  501(3),  501(4)  (with  respect to any of
Sections 1005 through 1008, inclusive, and Section 801), 501(5) and 501(8) shall
be deemed not to be or result in an Event of Default,  in each case with respect
to the Outstanding  Securities of such series as provided in this Section on and
after  the  date  the  conditions  set  forth  in  Section  1304  are  satisfied
(hereinafter  called  "Covenant  Defeasance").  For this purpose,  such Covenant
Defeasance  means  that 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
specified  Section (to the extent so specified  in the case of Section  501(4)),
whether  directly or indirectly by reason of any reference  elsewhere  herein to
any such Section or by reason of any  reference in any such Section to any other
provision  herein or in any other document,  but the remainder of this Indenture
and the Securities of such series shall be unaffected thereby.


Section 1304.  Conditions to Defeasance or Covenant Defeasance.

                  The following shall be the conditions to application of either
Section 1302 or Section 1303 to the  Outstanding  Securities  of any  Defeasible
Series:

                  (1) The Company shall  irrevocably have deposited or caused to
         be deposited  with the Trustee (or another  trustee that  satisfies the
         requirements  contemplated by Section 609 and agrees to comply with the
         provisions of this Article Thirteen 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  Outstanding  Securities  of such  series,  (A) money in an
         amount, or (B) U.S.  Government  Obligations that 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,  money in an amount, or (C) a combination thereof, in each
         case  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 any such other qualifying trustee) to pay
         and  discharge,  the  principal  of and any premium and interest on the
         Securities  of such  series on the  respective  Stated  Maturities,  in
         accordance  with the terms of this Indenture and the Securities of such
         series.  As used herein,  "U.S.  Government  Obligation"  means (x) any
         security  that is (i) a  direct  obligation  of the  United  States  of
         America  for the  payment  of which the full  faith  and  credit of the
         United  States of America is pledged or (ii) an  obligation of a Person
         controlled or supervised by and acting as an agency or  instrumentality
         of the United States of America the payment of which is unconditionally
         guaranteed as the full faith and credit obligation by the United States
         of  America,  which,  in either  case (i) or (ii),  is not  callable or
         redeemable at the option of the issuer thereof,  and (y) any depositary
         receipt  issued  by a  bank  (as  defined  in  Section  3(a)(2)  of the
         Securities Act  of 1933,  as amended)  as custodian with respect to any
         U.S.  Government  Obligation  specified  in Clause (x) and held by such
         custodian for the account of the holder of such depositary  receipt, or
         with respect to any specific payment of principal of or interest on any
         such U.S. Government  Obligation,  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 depositary receipt from any amount
         received by the custodian in respect of the U.S. Government  Obligation
         or the  specific  payment of  principal  or interest  evidenced by such
         depositary receipt.

                  (2) In the case of an election under Section 1302, the Company
         shall have delivered to the Trustee an Opinion of Counsel  stating that
         (A) the Company has received  from, or there has been published by, the
         Internal Revenue Service a ruling or (B) since the date first set forth
         hereinabove,  there has been a change in the applicable  Federal income
         tax law,  in  either  case (A) or (B) to the  effect  that,  and  based
         thereon such opinion shall confirm that, the Holders of the Outstanding
         Securities of such series will not  recognize  gain or loss for Federal
         income  tax  purposes  as a  result  of  the  deposit,  Defeasance  and
         discharge to be effected with respect to the  Securities of such series
         and will be subject to Federal  income tax on the same  amount,  in the
         same manner and at the same times as would be the case if such deposit,
         Defeasance and discharge were not to occur.

                  (3) In the case of an election under Section 1303, the Company
         shall have delivered to the Trustee an Opinion of Counsel to the effect
         that the Holders of the Outstanding  Securities of such series will not
         recognize  gain or loss for Federal  income tax purposes as a result of
         the deposit and Covenant  Defeasance to be effected with respect to the
         Securities of such series and will be subject to Federal  income tax on
         the same  amount,  in the same manner and at the same times as would be
         the case if such deposit and Covenant Defeasance were not to occur.

                  (4)  The  Company  shall  have  delivered  to the  Trustee  an
         Officer's Certificate to the effect that the Securities of such series,
         if then listed on any  securities  exchange,  will not be delisted as a
         result of such deposit.

                  (5) No Event of Default or event that  (after  notice or lapse
         of time or both) would become an Event of Default  shall have  occurred
         and be  continuing  at the time of such  deposit or, with regard to any
         Event of Default or any such event  specified  in  Sections  501(6) and
         (7),  at any time on or prior  to the 90th day  after  the date of such
         deposit (it being  understood  that this condition  shall not be deemed
         satisfied until after such 90th day).

                  (6) Such Defeasance or Covenant Defeasance shall not cause the
         Trustee to have a conflicting  interest within the meaning of the Trust
         Indenture  Act  (assuming  all  Securities  are in  default  within the
         meaning of such Act).

                  (7) Such Defeasance or Covenant Defeasance shall not result in
         a breach or  violation  of, or  constitute a default  under,  any other
         agreement or  instrument to which the Company is a party or by which it
         is bound.

                  (8)  The  Company  shall  have  delivered  to the  Trustee  an
         Officers'  Certificate and an Opinion of Counsel, each stating that all
         conditions  precedent  with  respect  to such  Defeasance  or  Covenant
         Defeasance have been complied with.

                  (9) Such Defeasance or Covenant Defeasance shall not result in
         the trust arising from such deposit  constituting an investment company
         within the meaning of the  Investment  Company Act of 1940, as amended,
         unless  such trust  shall be  qualified  under such Act or exempt  from
         regulation thereunder.


Section 1305.  Deposited Money and U.S. Government
               Obligations to be Held in Trust; Other
               Miscellaneous Provisions.

                  Subject to the  provisions  of the last  paragraph  of Section
1003, all money and U.S. Government Obligations (including the proceeds thereof)
deposited with the Trustee or other  qualifying  trustee (solely for purposes of
this  Section and  Section  1306,  the  Trustee  and any such other  trustee are
referred to collectively  as the "Trustee")  pursuant to Section 1304 in respect
of the Securities of any Defeasible Series shall be held in trust and applied by
the Trustee,  in accordance with the provisions of the Securities of such series
and this Indenture,  to the payment,  either directly or through any such Paying
Agent  (including the Company acting as its own Paying Agent) as the Trustee may
determine,  to the Holders of Securities of such series,  of all sums due and to
become due thereon in respect of  principal  and any premium and  interest,  but
money so held in trust must be segregated from other funds.

                  The Company shall pay and  indemnify  the Trustee  against any
tax,  fee or other  charge  imposed on or assessed  against the U.S.  Government
Obligations  deposited  pursuant to Section 1304 or the  principal  and interest
received in respect thereof other than any such tax, fee or other charge that by
law is for the account of the Holders of Outstanding Securities.

                  Anything   in   this   Article   Thirteen   to  the   contrary
notwithstanding,  the Trustee  shall  deliver or pay to the Company from time to
time upon Company Request any money or U.S. Government Obligations held by it as
provided in Section 1304 with respect to  Securities  of any  Defeasible  Series
that,  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 that would then be required to be
deposited to effect an equivalent Defeasance or Covenant Defeasance with respect
to the Securities of such series.


Section 1306.  Reinstatement.

                  If the  Trustee  or the  Paying  Agent is  unable to apply any
money in accordance with this Article Thirteen with respect to the Securities of
any  series  by reason of any  order or  judgment  of any court or  governmental
authority enjoining, restraining or otherwise prohibiting such application, then
the Company's obligations under this Indenture and the Securities of such series
shall be revived and  reinstated  as though no deposit had occurred  pursuant to
this Article  Thirteen  with respect to  Securities of such series and monies so
deposited shall be returned to the Company.


                                ARTICLE FOURTEEN

                            Conversion of Securities

Section 1401.  Applicability; Conversion Privilege
               and Conversion Price.

                  Securities  of any series  which are  convertible  into Common
Stock of the Company shall be  convertible  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.

                  Subject to and upon  compliance  with the  provisions  of this
Article, at the option of the Holder thereof, any Security or any portion of the
principal  amount thereof which is $1,000 or an integral  multiple of $1,000 may
be converted at the principal amount thereof,  or of such portion thereof,  into
fully paid and  nonassessable  shares  (calculated as to each  conversion to the
nearest  1/100 of a share) of Common  Stock of the  Company,  at the  conversion
price,  determined as hereinafter provided, in effect at the time of conversion.
Such  conversion  right  shall  expire  at the  close  of  business  on the date
specified for Securities of such series.  In case a Security or portion  thereof
is called for redemption,  such  conversion  right in respect of the Security or
portion so called shall expire at the close of business on the date prior to the
Redemption  Date,  unless the  Company  defaults  in making the payment due upon
redemption.

                  The price at which  shares of Common  Stock shall be delivered
upon  conversion  (herein  called  the  "conversion  price")  shall be the price
specified in relation to Securities of such series  pursuant to Section 301. The
conversion  price shall be adjusted in certain  instances as provided in Section
1404.


Section 1402.  Exercise of Conversion Privilege.

                  In order to exercise the conversion  privilege,  the Holder of
any Security to be converted  shall  surrender such  Security,  duly endorsed or
assigned  to the  Company or in blank,  at any  office or agency of the  Company
maintained  for that purpose  pursuant to Section 1002,  accompanied  by written
notice to the Company  (which  shall be  substantially  in the form set forth in
Section 203) at such office or agency or, if applicable, by notice in accordance
with the  procedures  of the  Depositary  that the Holder elects to convert such
Security  or,  if  less  than  the  entire  principal  amount  thereof  is to be
converted,  the portion  thereof to be  converted.  Securities  surrendered  for
conversion  during the period from the close of  business on any Regular  Record
Date next preceding any Interest Payment Date to the opening of business on such
Interest  Payment  Date shall  (except  in the case of  Securities  or  portions
thereof which have been called for  redemption on a Redemption  Date within such
period) be  accompanied  by payment in New York  Clearing  House  funds or other
funds  acceptable  to the Company of an amount equal to the interest  payable on
such  Interest  Payment  Date  on  the  principal  amount  of  Securities  being
surrendered for conversion;  provided,  however, that a Security surrendered for
conversion on an Interest  Payment Date need not be accompanied by a payment and
interest on the principal amount of the Security being converted will be paid on
such  Interest  Payment Date to the Holder of such  Security on the  immediately
preceding  Record Date.  Except as provided in the Securities and subject to the
last  paragraph of Section 307, no payment or adjustment  shall be made upon any
conversion on account of any interest accrued on the Securities  surrendered for
conversion  or on  account of any  dividends  on the Common  Stock  issued  upon
conversion.

                  Securities shall be deemed to have been converted  immediately
prior to the close of business on the day of  surrender of such  Securities  for
conversion in accordance  with the  foregoing  provisions,  and at such time the
rights of the Holders of such Securities as Holders shall cease,  and the Person
or Persons  entitled to receive the Common Stock issuable upon conversion  shall
be treated for all purposes as the record holder or holders of such Common Stock
at such time. As promptly as practicable  on or after the  conversion  date, the
Company shall issue and shall deliver at such office or agency a certificate  or
certificates  for the  number  of full  shares  of Common  Stock  issuable  upon
conversion,  together  with  payment  in lieu of any  fraction  of a  share,  as
provided in Section 1403.

                  In the case of any  Security  which is converted in part only,
upon  such   conversion   the  Company  shall  execute  and  the  Trustee  shall
authenticate and deliver to the Holder thereof, at the expense of the Company, a
new Security or Securities of authorized  denominations  in aggregate  principal
amount  equal  to the  unconverted  portion  of the  principal  amount  of  such
Security.


Section 1403.  Fractions of Shares.

                  No  fractional  shares of Common  Stock  shall be issued  upon
conversion of Securities.  If more than one Security  shall be  surrendered  for
conversion at one time by the same Holder, the number of full shares which shall
be  issuable  upon  conversion  thereof  shall be  computed  on the basis of the
aggregate  principal amount of the Securities (or specified portions thereof) so
surrendered.  Instead  of any  fractional  share of  Common  Stock  which  would
otherwise  be  issuable  upon  conversion  of any  Security  or  Securities  (or
specified portions thereof),  the Company shall pay a cash adjustment in respect
of such  fraction in an amount equal to the same  fraction of the Closing  Price
per share of Common  Stock at the close of  business on the day prior to the day
of conversion.

Section 1404.  Adjustment of Conversion Price.

                  The conversion  price shall be subject to adjustment from time
to time as follows:

                  (1) In case the Company  shall pay or make a dividend or other
distribution  on its Common Stock in shares of its Common Stock,  the conversion
price in effect at the opening of business on the day  following  the date fixed
for the determination of stockholders entitled to receive such dividend or other
distribution shall be reduced by multiplying such conversion price by a fraction
of which (x) the  numerator  shall be the  number  of  shares  of  Common  Stock
outstanding  at the close of business  on the date fixed for such  determination
and (y) the denominator  shall be the sum of such number of shares and the total
number  of  shares  constituting  such  dividend  or  other  distribution,  such
reduction to become effective  immediately  after the opening of business on the
day  following the date fixed for such  determination.  For the purposes of this
paragraph  (1),  the  number of shares of Common  Stock at any time  outstanding
shall not include  shares held in the treasury of the Company but shall  include
shares issuable in respect of scrip certificates  issued in lieu of fractions of
shares  of Common  Stock.  The  Company  will not pay any  dividend  or make any
distribution on shares of Common Stock held in the treasury of the Company.

                  (2) In case the Company shall issue rights or warrants  (which
rights or warrants  expire within 45 days and are not available on an equivalent
basis to Holders of the Securities convertible pursuant to this Article Fourteen
upon  conversion) to all holders of its Common Stock entitling them to subscribe
for or  purchase  shares  of Common  Stock at a price  per  share  less than the
current market price per share  (determined as provided in paragraph (6) of this
Section)  of the  Common  Stock  on the  date  fixed  for the  determination  of
stockholders  entitled to receive such rights or warrants,  the conversion price
in effect at the  opening of business  on the day  following  the date fixed for
such  determination  shall be reduced by multiplying  such conversion price by a
fraction of which the  numerator  shall be the number of shares of Common  Stock
outstanding  at the close of business  on the date fixed for such  determination
plus the number of shares of Common  Stock which the  aggregate  of the offering
price of the total number of shares of Common Stock so offered for  subscription
or purchase  would  purchase at such current  market  price and the  denominator
shall be the  number  of  shares of  Common  Stock  outstanding  at the close of
business on the date fixed for such  determination  plus the number of shares of
Common Stock so offered for  subscription or purchase,  such reduction to become
effective  immediately  after the opening of business on the day  following  the
date fixed for such determination;  provided,  however,  that to the extent that
Common Stock is not delivered  after the  expiration of such rights or warrants,
the  conversion  price shall be readjusted  (but only with respect to Securities
converted after such  expiration) to the conversion  price that would then be in
effect had the  adjustments  made upon the  issuance  of such rights or warrants
been  made  upon the basis of  delivery  of only the  number of shares of Common
Stock actually issued. In determining whether any rights or warrants entitle the
holders of Common Stock to subscribe  for or purchase  shares of Common Stock at
less than fair market value, there shall be taken into account any consideration
received  by the  Company  upon  issuance  and upon  exercise  of such rights or
warrants, the value of such consideration,  if other than cash, to be determined
by the Board of Directors (whose determination shall be conclusive and described
in a Board  Resolution).  For the purposes of this  paragraph (2), the number of
shares of Common Stock at any time outstanding  shall not include shares held in
the  treasury  of the Company but shall  include  shares  issuable in respect of
scrip  certificates  issued in lieu of fractions of shares of Common Stock.  The
Company  will not issue any  rights or  warrants  in respect of shares of Common
Stock held in the treasury of the Company.

                  (3) In case  outstanding  shares  of  Common  Stock  shall  be
subdivided into a greater number of shares of Common Stock, the conversion price
in effect at the  opening of business  on the day  following  the day upon which
such  subdivision  becomes  effective  shall be  proportionately  reduced,  and,
conversely,  in case  outstanding  shares of Common Stock shall each be combined
into a smaller number of shares of Common Stock,  the conversion price in effect
at the  opening  of  business  on the day  following  the day  upon  which  such
combination becomes effective shall be proportionately increased, such reduction
or  increase,  as the case may be, to  become  effective  immediately  after the
opening of business on the day following the day upon which such  subdivision or
combination becomes effective.

                  (4) In case the Company  shall,  by dividend or otherwise,  at
any  time  distribute  Excess  Cash to all  holders  of its  Common  Stock,  the
conversion  price  shall be  reduced  so that the same  shall  equal  the  price
determined by multiplying the conversion  price in effect  immediately  prior to
the  effectiveness  of the  conversion  price  reduction  contemplated  by  this
paragraph (4) by a fraction of which the numerator  shall be the current  market
price per share (determined as provided in paragraph (6) of this Section) of the
Common  Stock on such  date  less  the  amount  of  Excess  Cash so  distributed
applicable  to one  share of  Common  Stock  and the  denominator  shall be such
current  market price per share of the Common  Stock,  such  reduction to become
effective  immediately prior to the opening of business on the day following the
date fixed for the  determination of stockholders  entitled to receive such cash
dividend.  "Excess Cash" shall mean any dividend or distribution (excluding,  in
all events,  any dividend or  distribution  described  in paragraph  (5) of this
Section)  consisting  exclusively  of cash and  declared  with respect to Common
Stock to the  extent  such  dividend  or  distribution  when  added to all other
dividends or distributions  on Common Stock  consisting  exclusively of cash and
made during the immediately  preceding 12 months  (applicable to one outstanding
share of Common Stock)  exceeds 15% of the current market price per share of the
Common  Stock  immediately  preceding  the date fixed for the  determination  of
stockholders entitled to receive such cash dividend.

                  (5) In case the  Company  shall,  by  dividend  or  otherwise,
distribute to all holders of its Common Stock  evidences of its  indebtedness or
assets or rights or warrants to subscribe for or purchase any of its  securities
(including securities, but excluding any dividend or distribution referred to in
paragraph (1) of this Section,  any rights or warrants  referred to in paragraph
(2) of this Section, any subdivision or combination referred to in paragraph (3)
of this Section,  and any dividend or  distribution  payable in cash (other than
cash dividends or distributions made out of Excess Cash as provided in paragraph
(4) of this  Section,  which shall be treated  under such  paragraph  (4)),  the
conversion  price  shall be  adjusted  so that the same  shall  equal  the price
determined by multiplying the conversion  price in effect  immediately  prior to
the close of business on the date fixed for the  determination  of  stockholders
entitled to receive such distribution by a fraction of which the numerator shall
be the current  market price per share  (determined as provided in paragraph (6)
of this  Section) of the Common  Stock on the date fixed for such  determination
less the then fair market value (as determined by the Board of Directors,  whose
determination shall be conclusive and described in a Board Resolution filed with
the  Trustee)  of the  portion of the assets or  evidences  of  indebtedness  so
distributed applicable to one share of Common Stock and the denominator shall be
such current  market price per share of the Common  Stock,  such  adjustment  to
become  effective  immediately  prior  to the  opening  of  business  on the day
following  the date fixed for the  determination  of  stockholders  entitled  to
receive  such  distribution.  For  the  purposes  of  this  paragraph  (5),  the
distribution  of a security which is distributed  not only to the holders of the
Common Stock on the date fixed for the  distribution of such security,  but also
is distributed with each share of Common Stock delivered to a Holder  exercising
the conversion privilege subsequent to such distribution date, shall not require
an adjustment of the conversion  price pursuant to this paragraph (5);  provided
that on the date, if any, on which a Holder exercising the conversion  privilege
would no longer be  entitled  to receive  such  security  with a share of Common
Stock  (other than as a result of the  termination  of all such  securities),  a
distribution  of such  securities  shall  be  deemed  to have  occurred  and the
conversion  price shall be adjusted as provided in this  paragraph (5) (and such
day  shall  be  deemed  to be  "the  date  fixed  for the  determination  of the
stockholders  entitled to receive  such  distribution,"  and "the date fixed for
such determination" within the meaning of the immediately preceding sentence).

                  (6) For the purpose of any computation  under  paragraphs (2),
(4) and (5) of this Section,  the current market price per share of Common Stock
on any date shall be deemed to be the  average of the daily  closing  prices for
the five  consecutive  Trading Days selected by the Company  commencing not more
than 20 Trading Days before,  and ending not later than,  the earlier of the day
in  question  and the day before the "ex" date with  respect to the  issuance or
distribution requiring such computation. The closing price for each day shall be
the last  reported  sales price  regular way or, in case no such  reported  sale
takes  place on such day,  the  average of the  reported  closing  bid and asked
prices  regular  way, in either case on the New York Stock  Exchange  or, if the
Common  Stock is not listed or  admitted  to trading  on such  Exchange,  on the
principal  national  securities  exchange on which the Common Stock is listed or
admitted to trading  or, if not listed or  admitted  to trading on any  national
securities exchange, on the National Association of Securities Dealers Automated
Quotations  National  Market  System  or, if the  Common  Stock is not listed or
admitted  to  trading  on any  national  securities  exchange  or quoted on such
National  Market System,  the average of the closing bid and asked prices in the
over-the-counter  market as furnished by any New York Stock Exchange member firm
selected from time to time by the Company for that purpose. For purposes of this
paragraph,  the term "'ex'  date",  when used with  respect to any  issuance  or
distribution,  means the first date on which the Common Stock trades regular way
on such exchange or in such market without the right to receive such issuance or
distribution.

                  (7) The Company  may make such  reductions  in the  conversion
price,  in addition to those  required by  paragraphs   (1)  through (5) of this
Section,  as it considers  to be  advisable in order that any event  treated for
Federal  income tax purposes as a dividend of stock or stock rights shall not be
taxable to the recipients.

                  (8)  Notwithstanding  any  provision of this  Indenture to the
contrary,  no adjustment in the conversion  price shall be required  unless such
adjustment would require an increase or decrease of at least one percent in such
price; provided, however, that any adjustments which by reason of this paragraph
(8) are not required to be made shall be carried  forward and taken into account
in any subsequent adjustment.  All calculations under this Article shall be made
to the nearest cent or to the nearest  one-hundredth of a share, as the case may
be.

                  (9) The  Company  from time to time (by action of the Board of
Directors)  may  decrease the  conversion  price by any amount for any period of
time if the period is at least twenty days, the decrease is  irrevocable  during
the period and the Board of Directors in its sole  discretion  shall have made a
determination  that such decrease would be in the best interests of the Company,
which  determination  shall be conclusive  and  evidenced by a Board  Resolution
filed with the Trustee.  Whenever the conversion price is decreased  pursuant to
the  preceding  sentence,  the  Company  shall  mail to holders of record of the
Securities a notice of the decrease at least fifteen days prior to the date such
decrease  takes  effect,  and such notice shall state the  decreased  conversion
price and the period it will be in effect.

                  (10)  Notwithstanding  any provision of this  Indenture to the
contrary, no adjustment in the conversion price will be made for the issuance of
shares of capital  stock to  directors,  employees  or  independent  contractors
pursuant  to the  Company's  or any of its  Subsidiaries'  stock  option,  stock
ownership or other benefit plans or  arrangements  or trusts related  thereto or
for issuance of any shares of Common Stock  pursuant to any plan  providing  for
the  reinvestment of dividends or interest  payable on securities of the Company
and the  investment  of  additional  optional  amounts in shares of Common Stock
under such plan.

                  (11) If the Company shall take any action affecting the Common
Stock,  other than  action  described  in this  Section  1404,  that in the sole
discretion  of the Board of  Directors  would  materially  adversely  affect the
conversion  rights of the holders of the Securities,  the Company may, but shall
not be obligated  to, adjust the  conversion  price for the  Securities,  to the
extent  permitted  by law,  in such  manner,  and at such time,  as the Board of
Directors,  in  its  sole  discretion,  may  determine  to be  equitable  in the
circumstances.


Section 1405.  Notice of Adjustments of Conversion Price.

                  Whenever the conversion price is adjusted as herein provided:

                  (a) the Company shall compute the adjusted conversion price in
         accordance with Section 1404 and shall prepare a certificate  signed by
         the Treasurer or Director of Treasury of the Company  setting forth the
         adjusted  conversion  price and showing in reasonable  detail the facts
         upon  which  such  adjustment  is  based,  and such  certificate  shall
         forthwith be filed at the Corporate  Trust Office of the Trustee and at
         each  office or agency  maintained  for the  purpose of  conversion  of
         Securities pursuant to Section 1002; and

                  (b) a  notice  stating  that  the  conversion  price  has been
         adjusted  and  setting  forth  the  adjusted   conversion  price  shall
         forthwith be required, and as soon as practicable after it is required,
         such notice shall be mailed by the Company to all Holders at their last
         addresses as they shall appear in the Security Register.


Section 1406.  Notice of Certain Corporate Action.

                  In case:

                  (a) the  Company  shall  declare  a  dividend  (or  any  other
         distribution) on its Common Stock payable otherwise than in cash out of
         its retained earnings; or

                  (b) the Company shall authorize the granting to the holders of
         its Common Stock of rights or warrants to subscribe for or purchase any
         shares of Capital Stock of any class or of any other rights; or

                  (c)  the Company shall declare a dividend out of
         Excess Cash; or

                  (d) of any reclassification of the Common Stock of the Company
         (other than a subdivision or combination of its  outstanding  shares of
         Common Stock),  or of any  consolidation or merger to which the Company
         is a party and for which approval of any stockholders of the Company is
         required, or of the sale or transfer of all or substantially all of the
         assets of the Company; or

                  (e)  of the voluntary or involuntary dissolution,
         liquidation or winding up of the Company;

then the Company  shall cause to be filed at the  Corporate  Trust Office of the
Trustee and at each office or agency maintained for the purpose of conversion of
Securities pursuant to Section 1002, and shall cause to be mailed to all Holders
at their last addresses as they shall appear in the Security Register,  at least
15 days (or 10 days in any case  specified  in clause (a) or (b) above) prior to
the applicable  record,  effective or expiration date hereinafter  specified,  a
notice  stating (x) the date on which a record is to be taken for the purpose of
such dividend,  distribution,  rights or warrants,  or, if a record is not to be
taken, the date as of which the holders of Common Stock of record to be entitled
to such dividend, distribution,  rights or warrants are to be determined, or (y)
the date on which such reclassification,  consolidation, merger, sale, transfer,
dissolution,  liquidation or winding up is expected to become effective, and the
date as of which it is expected  that holders of Common Stock of record shall be
entitled to exchange their shares of Common Stock for securities,  cash or other
property deliverable upon such  reclassification,  consolidation,  merger, sale,
transfer,  dissolution,  liquidation or winding up.  Neither the failure to give
any such notice nor any defect  therein shall affect the legality or validity of
any action described in clauses (a) through (f) of this Section 1406.


Section 1407.  Company to Reserve Common Stock.

                  The Company  shall at all times  reserve  and keep  available,
free from  preemptive  rights,  out of its authorized but unissued Common Stock,
for the purpose of effecting the  conversion of  Securities,  the full number of
shares of Common Stock then  issuable  upon the  conversion  of all  Outstanding
Securities.


Section 1408.  Taxes on Conversions.

                  The Company  will pay any and all taxes that may be payable in
respect of the issue or  delivery  of shares of Common  Stock on  conversion  of
Securities  pursuant hereto. The Company shall not, however,  be required to pay
any tax which may be payable in respect of any  transfer  involved  in the issue
and  delivery of shares of Common  Stock in a name other than that of the Holder
of the Security or  Securities  to be  converted,  and no such issue or delivery
shall be made unless and until the Person  requesting such issue has paid to the
Company the amount of any such tax, or has  established to the  satisfaction  of
the Company that such tax has been paid.


Section 1409.  Covenant as to Common Stock.

                  The Company  covenants  that all shares of Common  Stock which
may be issued upon  conversion of  Securities  will upon issue be fully paid and
nonassessable.

Section 1410.  Cancellation of Converted Securities.

                  All Securities  delivered for conversion shall be delivered to
the Trustee to be cancelled by or at the  direction of the Trustee,  which shall
dispose of the same as provided in Section 309.

Section 1411.  Provisions in Case of Reclassification,
               Consolidation, Merger or Sale of Assets.

                  In case of any capital  reorganization or  reclassification of
the capital  stock of the Company  (other than solely a change in par value,  or
from par value to no par value) or any  consolidation  of the Company  with,  or
merger of the Company into, any other Person,  any merger of another Person into
the Company (other than a merger which does not result in any  reclassification,
conversion,  exchange or cancellation  of outstanding  shares of Common Stock of
the Company) or any sale or transfer of all or  substantially  all of the assets
of the Company,  the Holder of each  Security  then  outstanding  shall have the
right  thereafter,  during the period  such  Security  shall be  convertible  as
specified  in Section  1401,  to convert  such  Security  only into the kind and
amount  of   securities,   cash  and  other   property   receivable   upon  such
reorganization,  recapitalization,  consolidation, merger, sale or transfer by a
holder of the number of shares of Common  Stock of the  Company  into which such
Security might have been  converted  immediately  prior to such  reorganization,
consolidation, merger, sale or transfer, assuming such holder of Common Stock of
the  Company (i) is not a Person  with which the  Company  consolidated  or into
which the Company  merged or which merged into the Company or to which such sale
or transfer was made, as the case may be ("constituent Person"), or an Affiliate
of a constituent Person and

(ii) failed to exercise his rights of election, if any, as to the kind or amount
of  securities,  cash and other  property  receivable  upon such  consolidation,
merger,  sale or transfer  (provided  that if the kind or amount of  securities,
cash and other property  receivable  upon such  consolidation,  merger,  sale or
transfer  is not the same for each  share of Common  Stock of the  Company  held
immediately prior to such consolidation, merger, sale or transfer by others than
a constituent Person or an Affiliate thereof and in respect of which such rights
of election shall not have been exercised  ("non-electing  share"), then for the
purpose  of this  Section  the kind and  amount  of  securities,  cash and other
property  receivable upon such  consolidation,  merger, sale or transfer by each
non-electing  share shall be deemed to be the kind and amount so receivable  per
share by a plurality of the non-electing  shares).  The Company shall not effect
any consolidation,  merger, sale or transfer unless,  prior to or simultaneously
with the  consummation  thereof  the  Person  formed  by such  consolidation  or
resulting  from such merger or which  acquires such assets,  as the case may be,
shall execute and deliver to the Trustee a  supplemental  indenture  pursuant to
which  such  Person  assumes  the  obligation  to  deliver to the Holder of each
Security such securities, cash and other property as such Holder may be entitled
to in accordance  with the  provisions of this Section 1411.  Such  supplemental
indenture  shall provide for  adjustments  which,  for events  subsequent to the
effective date of such supplemental indenture,  shall be as nearly equivalent as
may be practicable to the adjustments  provided for in this Article. The Trustee
shall  not be under any  responsibility  to  determine  the  correctness  of any
provision  contained in such supplemental  indenture relating to either the kind
or amount of shares of stock or  securities  or cash or property  receivable  by
Holders upon the conversion of their  Securities  after any such  consolidation,
merger,  sale or transfer.  The above provisions of this Section shall similarly
apply to successive consolidations, mergers, sales or transfers.

Section 1412.  Responsibility of Trustee and Conversion Agent.

                  Neither  the  Trustee  nor  any  agent   appointed  to  effect
conversions  shall at any time be under any duty or responsibility to any Holder
of  Securities  to  determine  whether  any facts  exist  which may  require any
adjustment of the conversion  price,  or with respect to the nature or extent of
any such adjustment when made, or with respect to the method employed, or herein
or in any supplemental  indenture  provided to be employed,  in making the same.
Neither the  Trustee nor any such  conversion  agent shall be  accountable  with
respect to the  validity or value (or the kind or amount) of any Common Stock or
of any  securities or property which may at any time be issued or delivered upon
the conversion of any Security;  and neither the Trustee nor any such conversion
agent makes any representation with respect thereto. Neither the Trustee nor any
such  conversion  agent shall be  responsible  for any failure of the Company to
issue,  transfer  or deliver  any Common  Stock or stock  certificates  or other
securities  or property  or to make any cash  payment  upon the  delivery of any
Security for the purpose of  conversion  or to comply with any of the  covenants
contained in this Article.



                                ARTICLE FIFTEEN

                          Subordination of Securities

Section 1501.  Securities Subordinate to Senior
               Indebtedness.

                  The  Company   covenants  and  agrees,   and  each  Holder  of
Securities of each series,  by his acceptance  thereof,  likewise  covenants and
agrees,  that,  the  indebtedness  evidenced by the  Securities  of such series,
including the principal of (and premium,  if any) and interest thereon,  and the
payment of the principal of (and premium, if any) and interest thereon, shall be
subordinate  and  subject in right of  payment,  to the extent and in the manner
hereinafter set forth,  to the prior payment in full of all Senior  Indebtedness
with respect thereto,  whether  outstanding on the date of original  issuance of
Securities of such series or thereafter incurred.


Section 1502.  Priority of Senior Indebtedness Upon
               Dissolution of the Company.

                  Upon any distribution of the assets of the Company of any kind
or  character  upon  any  dissolution,   winding  up  or  total  liquidation  or
reorganization   relating  to  the  Company  or  to  its  property  (whether  in
bankruptcy,  insolvency or receivership  proceedings,  or upon an assignment for
the benefit of creditors, any other marshalling of the assets and liabilities of
the Company or otherwise),  whether such distribution consists of cash, property
or securities,

                  (a) all  principal  of  (premium,  if any) and interest on all
         Senior Indebtedness with respect to any series of Securities (including
         interest  thereon  accruing after the commencement of any bankruptcy or
         insolvency  proceedings) shall first be paid in full, or provision made
         for such payment in cash,  before any payment is made on account of the
         principal  of,  premium,   if  any,  or  interest  on  that  series  of
         Securities; and

                  (b) any  payment or  distribution  of assets of the Company of
         any kind or character,  whether in cash,  property or securities (other
         than  securities  of  the  Company  as  reorganized  or  readjusted  or
         securities  of the Company or any other  corporation  provided for by a
         plan  of  reorganization  or  readjustment  the  payment  of  which  is
         subordinate,  at least to the extent  provided in this Article  Fifteen
         with  respect to the  Securities  of any series,  to the payment of all
         indebtedness of the nature of Senior Indebtedness with respect thereto,
         provided that the rights of the holders of such Senior  Indebtedness at
         the  time  outstanding  are  not  altered  by  such  reorganization  or
         readjustment),   on  account  of  the  indebtedness  evidenced  by  the
         Securities  of any series to which the  holders of  Securities  of that
         series or the Trustee  would be entitled  except for the  provisions of
         this Article Fifteen,  including any such payment or distribution which
         may be  payable  or  deliverable  by  reason  of  payment  of any other
         indebtedness  of the Company being  subordinated  to the payment of the
         Securities of that series, shall be paid or delivered by the trustee in
         bankruptcy,  receiver,  assignee  for the benefit of creditors or other
         liquidating  agent making such payment or distribution  directly to the
         holders  of  Senior   Indebtedness  with  respect  to  that  series  of
         Securities,  or  their  representative  or  representatives  or to  the
         trustee  or  trustees  under  any  indenture   pursuant  to  which  any
         instruments  evidencing any of such Senior  Indebtedness  may have been
         issued,  pro  rata,  as  their  respective  interests  may  appear  for
         application  to the payment of all such Senior  Indebtedness  remaining
         unpaid to the extent  necessary to pay all such Senior  Indebtedness in
         full after giving effect to any concurrent payment or distribution,  or
         provision therefor in cash, to the holders of such Senior Indebtedness.
         The  Company  shall give  prompt  written  notice to the Trustee of any
         dissolution,  winding up, total  liquidation or  reorganization  of the
         Company within the meaning of this Section 1502.  The Trustee,  subject
         to the  provisions  of Section  601 shall be entitled to assume that no
         such  event has  occurred  unless  the  Company or any holder of Senior
         Indebtedness  or any trustee  therefor has given such notice.  Upon any
         payment or  distribution  of assets of the Company  referred to in this
         Section 1502,  the Trustee,  subject to the  provisions of Section 601,
         and the holders of the  Securities  of any series  shall be entitled to
         rely  upon  a  certificate  of the  trustee  in  bankruptcy,  receiver,
         assignee for the benefit of creditors or other liquidating agent making
         such  payment  or  distribution,  delivered  to the  Trustee  or to the
         holders of Securities of that series,  for the purpose of  ascertaining
         the persons entitled to participate in such  distribution,  the holders
         of the Senior  Indebtedness  with respect to that series of  Securities
         and other  indebtedness  of the Company,  the amount thereof or payable
         thereon,  the amount or amounts  paid or  distributed  thereon  and all
         other facts pertinent thereto or to this Article Fifteen.  The Trustee,
         however,  shall not be deemed to owe any fiduciary  duty to the holders
         of Senior  Indebtedness  and shall not be  accountable  to them for any
         amounts paid to it upon any such distribution.


Section 1503.  Notice to Senior Indebtedness of
               Acceleration on Event of Default.


                  In the  event  that  the  Securities  of any  series  shall be
accelerated  because  of the  occurrence  of an Event of Default  hereunder  the
Company shall  promptly  notify holders of Senior  Indebtedness  with respect to
that series of such acceleration.


Section 1504.  Certain Distributions of Company Assets to
               the Trustee or Holders of the Securities to
               be Held in Trust for Holders of Senior
               Indebtedness.

                  In  the  event  that  any  direct  or   indirect   payment  or
distribution of assets of the Company of any kind or character, whether in cash,
property or securities  (other than  securities of the Company as reorganized or
readjusted or securities of the Company or any other corporation provided for by
a plan of reorganization or readjustment the payment of which is subordinate, at
least to the  extent  provided  in this  Article  Fifteen  with  respect  to the
Securities of any series,  to the payment of all  indebtedness  of the nature of
Senior  Indebtedness  with  respect  thereto,  provided  that the  rights of the
holders of such Senior  Indebtedness at the time  outstanding are not altered by
such reorganization or readjustment),  on account of the indebtedness  evidenced
by the  Securities of any series shall be received by the Trustee or the holders
of that series of Securities in  contravention  of Sections 1502 or 1507 hereof,
including any such payment or  distribution  which may be payable or deliverable
by reason of payment of any other indebtedness of the Company being subordinated
to the payment of the Securities of that series,  before all Senior Indebtedness
with respect to that series of Securities is paid in full, or provision made for
its payment in cash, such payment or distribution shall be held in trust for the
benefit of, and shall be paid over or  delivered  to, the holders of such Senior
Indebtedness or their  representative or  representatives,  or to the Trustee or
Trustees under any indenture  pursuant to which any  instruments  evidencing any
such Senior  Indebtedness  may have been issued,  pro rata, as their  respective
interests  may  appear,  for  application  to the  payment  of all  such  Senior
Indebtedness  remaining  unpaid to the extent  necessary  to pay all such Senior
Indebtedness after giving effect to any concurrent  payment or distribution,  or
provision therefor in cash, to the holders of such Senior Indebtedness.


Section 1505.  Subrogation of Security Holders to Rights of
               Holders of Senior Indebtedness.

                  Subject to the payment in full of all Senior Indebtedness with
respect to any series of  Securities,  the  holders  of the  Securities  of that
series  shall  be  subrogated  to the  rights  of the  holders  of  such  Senior
Indebtedness  to receive  payments or distribution of assets of the Company made
on such  Senior  Indebtedness  until all  principal  of the  Securities  of that
series,  premium,  if any, and interest  thereon shall be paid in full,  and for
purposes of such  subrogation,  no such payments or distributions to the holders
of such Senior  Indebtedness  of cash,  property or securities,  which otherwise
would be payable or  distributable  to the  holders  of the  Securities  of that
series,  shall, as between the Company,  its creditors other than the holders of
such  Senior  Indebtedness,  and the holders of such  series of  Securities,  be
deemed  to be a  payment  by  the  Company  to  or on  account  of  such  Senior
Indebtedness,  it being  understood  that the provisions of this Article Fifteen
are and are intended  solely for the purpose of defining the relative  rights of
the holders of the Securities of any series, on the one hand, and the holders of
Senior Indebtedness with respect thereto, on the other hand.


Section 1506.  Obligation of Company to Pay Security Holders
               Not Impaired.

                  Nothing contained in this Article Fifteen or elsewhere in this
Indenture, or in the Securities,  is intended to or shall impair, as between the
Company,  its  creditors  other  than the  holders of Senior  Indebtedness  with
respect to any series of  Securities,  and the holders of the Securities of that
series, the obligation of the Company,  which is absolute and unconditional,  to
pay to the  holders  of the  Securities  of that  series  the  principal  of the
Securities of that series,  premium,  if any, and interest thereon,  as and when
the same shall  become due and payable in  accordance  with their  terms,  or to
affect the relative  rights of the holders of the  Securities of that series and
creditors of the Company other than the holders of such Senior Indebtedness, nor
shall  anything  herein or  therein  prevent  the  Trustee  or the holder of any
Security of that series from  exercising  all  remedies  otherwise  permitted by
applicable law upon default under this Indenture, subject to the rights, if any,
under this Article Fifteen of the holders of such Senior Indebtedness in respect
of cash, property or securities of the Company received upon the exercise of any
such remedy.


Section 1507.  Payments on Securities Not to be Made
               During Continuance of Defaults in
               Respect of Senior Indebtedness.

                  No direct or indirect payment (in cash, property,  securities,
by set-off or  otherwise)  shall be made,  agreed to be made or provided for, on
account of the  principal of the  Securities  of a series,  premium,  if any, or
interest thereon or in respect of any redemption,  retirement, purchase or other
acquisition  of any of the  Securities  of that  series,  and no  holder  of any
Security of that series shall be entitled to demand or receive any such payment,
(a) unless,  as of the earlier to occur of the date such payment is made and the
date that  provision is made  therefor by the deposit with the Trustee or Paying
Agent  pursuant to the terms and  conditions of this  Indenture of money or U.S.
Government  Obligations  or a  combination  thereof  necessary  to  effect  such
payment, all amounts then due and payable for principal of (premium, if any) and
interest on all Senior  Indebtedness  with respect to that series of  Securities
shall  have been paid in full or (b) if at the  earlier  to occur of the date of
such payment or such provision  therefor,  or after giving effect to the earlier
to  occur of such  payment  or  provision,  there  shall  have  occurred  and be
continuing any event of default under any such Senior  Indebtedness or under any
agreement or indenture  pursuant to which any  instruments  evidencing  any such
Senior   Indebtedness   have  been  issued  and  the  maturity  of  such  Senior
Indebtedness  shall be  entitled  to have been  accelerated  as a result of such
event of default.

                  Notwithstanding the foregoing,  the Company may make, agree to
make, or make provision for,  payments on account of the principal of,  premium,
if any,  or  interest  on the  Securities  of any  series,  or in respect of any
redemption,  retirement,  purchase or other acquisition of any of the Securities
of that series if (a) the Company or the Trustee  (pursuant to Section 1508) has
received  a notice of a default or an event of default  under any  agreement  or
indenture pursuant to which any instruments  evidencing any Senior  Indebtedness
with respect to that series of Securities have been issued (other than notice of
a default or event of default  relating  to payment of  principal  or  interest,
either at maturity, upon redemption,  by declaration or otherwise) which default
or event of default  would  permit the  holders of such Senior  Indebtedness  to
accelerate  its maturity  (whether or not such  acceleration  has occurred) (the
receipt of such notice being referred to herein as a "Blockage Event"),  and (b)
179 days have passed after the earliest date on which such notice was given with
respect to such default or event of default (the "Payment Blockage Period"),  so
long as this Article otherwise permits payment at that time; provided,  however,
that only one Payment  Blockage  Period may be commenced  within any consecutive
360-day  period with respect to the  Securities  of any series.  For purposes of
this paragraph,  no event of default which existed or was continuing on the date
of the  commencement  of any Payment  Blockage Period with respect to the Senior
Indebtedness  initiating such Payment  Blockage Period shall be, or be made, the
basis  of  the   commencement   of  a  second  Payment   Blockage  Period  by  a
representative of such Senior  Indebtedness,  unless such event of default shall
have been cured or waived for not less than 90 consecutive days.

Section 1508.  Obligation of Company to Pay Security
               Holders; Application by Trustee of Moneys
               Deposited with it to Payment of Security
               Holders.

                  Nothing contained in this Article Fifteen or elsewhere in this
Indenture,  or in any of the Securities,  shall, (a) except during the existence
of any of the conditions described in Section 1507, affect the obligation of the
Company to make, or prevent the Company from making, at any time, payment of the
principal of the Securities,  premium,  if any, or interest thereon, or deposits
of moneys for such payments  with the Trustee or any Paying  Agent;  (b) prevent
the Trustee, notwithstanding the existence of any of the conditions described in
Section  1502 or  Section  1507,  from  applying  any moneys  deposited  with it
hereunder  for such purpose to the payment of or on account of the  principal of
the Securities,  premium, if any, or interest thereon unless, at least five full
Business Days prior to the date upon which such payment would otherwise  (except
for the  existence of any such  condition)  become due and payable,  the Trustee
shall have received  written  notice of the existence of any such  condition and
describing the same from the Company or any holder of Senior Indebtedness or any
Trustee or agent for or similar representative of any such holder, or (c) result
in charging the Trustee with  knowledge of the existence of Senior  Indebtedness
or, in the absence of written notice of the existence of any condition described
in  Section  1502 or Section  1507,  with  knowledge  of the  existence  of such
condition.


Section 1509.  Trustee as Holder of Senior Indebtedness.

                  The  Trustee  shall be entitled to all the rights set forth in
this Article  Fifteen in respect of any Senior  Indebtedness at any time held by
it, to the same extent as any other  holder of Senior  Indebtedness  and nothing
set forth in this Indenture  shall be construed to deprive the Trustee of any of
its rights as such holder.


Section 1510.  Security Holders Authorize Trustee to
               Effectuate Subordination.

                  Each holder of Securities by his acceptance thereof authorizes
and directs the Trustee in his behalf to take such  actions as may be  necessary
or  appropriate  to  effectuate  the  subordination  as provided in this Article
Fifteen  and  appoints  the Trustee  his  attorney-in-fact  for any and all such
purposes.


Section 1511.  Securities to Rank Pari Passu.

                  Each holder of Securities by his acceptance  thereof covenants
and agrees that the  indebtedness  evidenced by the  Securities,  including  the
principal of, premium,  if any, and interest  thereon,  shall rank pari passu in
right of payment with the  indebtedness  evidenced by the  Company's  12% Senior
Subordinated  Notes due December 15, 2001 and 11 1/2% Senior  Subordinated Notes
due January 15, 2002,  including in each case the principal of, premium, if any,
and interest thereon. 
                               ------------------


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

                  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.


                                                MAGMA COPPER COMPANY

                                                By
                                                  -----------------------------
                                                       Name:
                                                       Title:

Attest:


-----------------------------
                                                STATE STREET BANK AND TRUST
                                                COMPANY

                                                By
                                                  -----------------------------
                                                       Name:
                                                       Title:

Attest:


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


STATE OF . . . . . )
                               )  ss.:
COUNTY OF . . . .  )


                  On the  ____  day of May,  1995,  before  me  personally  came
_____________, to me known, who, being by me duly sworn, did depose and say that
he is  ________________  of  Magma  Copper  Company,  one  of  the  corporations
described in and which executed the foregoing instrument; that he knows the seal
of said corporation;  that the seal affixed to said instrument is such corporate
seal;  that it was so affixed by  authority  of the Board of  Directors  of said
corporation, and that he signed his name thereto by like authority.



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


STATE OF . . . . . )
                               )  ss.:
COUNTY OF . . . .  )

                  On the  ____  day of May,  1995,  before  me  personally  came
___________,  to me known,  who, being by me duly sworn, did depose and say that
he is  ________________  of State  Street  Bank and  Trust  Company,  one of the
corporations  described in and which executed the foregoing instrument;  that he
knows the seal of said corporation;  that the seal affixed to said instrument is
such  corporate  seal;  that it was so  affixed  by  authority  of the  Board of
Directors  of said  corporation,  and that he signed  his name  thereto  by like
authority.



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





                  FIRST  SUPPLEMENTAL  INDENTURE,  dated  as of  May  15,  1995,
between Magma Copper  Company,  a corporation  duly organized and existing under
the laws of the State of  Delaware  (herein  called the  "Company"),  having its
principal office at 7400 North Oracle Road,  Suite 200,  Tucson,  Arizona 85704,
and State Street Bank and Trust Company,  a banking  corporation  duly organized
and existing under the laws of the  Commonwealth  of  Massachusetts,  as Trustee
(herein called the "Trustee"), supplementing that certain Indenture, dated as of
May 15, 1995 (the "Indenture"), between the Company and the Trustee.


                            RECITALS OF THE COMPANY

                  The Company  has  heretofore  executed  and  delivered  to the
Trustee  the  Indenture  providing  for the  issuance  from  time to time of its
unsecured  senior   subordinated   debentures,   notes  or  other  evidences  of
indebtedness  (herein and therein called the "Securities"),  to be issued in one
or more series as in the Indenture provided.

                  Section  201  of  the  Indenture   permits  the  form  of  the
Securities of any series to be established pursuant to an indenture supplemental
to the Indenture.

                  Section  301  of  the  Indenture  permits  the  terms  of  the
Securities of any series, including any additional covenants of the Company with
respect thereto, to be established pursuant to an indenture  supplemental to the
Indenture.

                  The Company, pursuant to the foregoing authority,  proposes in
and by this First Supplemental  Indenture to establish the terms and form of the
Securities of a new series (the  "Designated  Securities") and to supplement the
Indenture in certain respects with respect to the Designated  Securities of such
series.

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


                  NOW, THEREFORE, THIS FIRST SUPPLEMENTAL INDENTURE
WITNESSETH:

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


                                  ARTICLE ONE

                        Definitions and Other Provisions
                             of General Application

Section 101.  Definitions.

                  (a) For all  purposes  of this First  Supplemental  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)  capitalized terms used herein without
         definition shall have the meanings specified in the
         Indenture;

                           (3)  unless  the  context  otherwise  requires,   any
         reference  to an  "Article"  or a  "Section"  refers to an Article or a
         Section, as the case may be, of this First Supplemental Indenture; and

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

                  (b)  For  all  purposes  of  the   Indenture  and  this  First
Supplemental  Indenture,  with respect to the  Securities of the series  created
hereby,  except as otherwise  expressly provided or unless the context otherwise
requires:

                  "Permitted  Investments"  means (i) interest  bearing  deposit
accounts in national or state banks having a combined capital and surplus of not
less than  $100,000,000  and a Moody's  Bank Credit  Report  Service  short-term
deposit  rating of P-1;  (ii)  bankers'  acceptances  drawn on and  accepted  by
commercial  banks  having a  combined  capital  and  surplus  of not  less  than
$100,000,000 and a Moody's Bank Credit Report Service  short-term deposit rating
of P-1;  (iii)  obligations  of the  United  States of  America or any agency or
instrumentality  of the United  States of America;  (iv)  commercial  or finance
company  paper  which is  rated  A-1 by  Standard  &  Poor's  or P-1 by  Moody's
Investors  Service;  (v) corporate debt securities rated A+ by Standard & Poor's
or A-1 by Moody's Investors Service;  (vi) repurchase agreements with banking or
financial  institutions  having a  combined  capital  surplus  of not less  than
$100,000,000 and a Moody's Bank Credit Report Service short-term deposit rating
of P-1 with respect to any of the foregoing obligations or securities; and (vii)
selected money market funds with assets of at least $1,000,000,000 and portfolio
guidelines  consistent  with the  foregoing  obligations  and  securities.  Such
investments  shall have maturity dates, or shall be subject to redemption by the
holder at the option of the holder, prior to the date which is one year from the
date of  purchase of such  investment.  (Section  401 of the First  Supplemental
Indenture).

                  "Qualified Asset Disposition" has the meaning
specified in Section 401.


                                  ARTICLE TWO

                                 Security Form

Section 201.  Form of Securities of this Series.

                  The  Securities  of this series shall be in the form  attached
hereto as Exhibit A.


                                 ARTICLE THREE

                            The Series of Securities

Section 301.  Title and Terms.

                  There  is  hereby   created  a  series  of   Securities   (the
"Designated  Securities") designated as the "8.70% Senior Subordinated Notes due
May 15, 2005" of the Company.  The stated maturity of the Designated  Securities
shall be May 15, 2005, on which date all principal of the Designated  Securities
shall become payable.

                  The Designated  Securities  shall bear interest at the rate of
8.70% per annum from May 15, 1995.  Interest on the Designated  Securities shall
be payable  semi-annually  on May 15 and  November  15 of each year,  commencing
November 15, 1995,  until the principal  thereof is made  available for payment.
The  interest so  payable,  and  punctually  paid or duly  provided  for, on any
Interest  Payment Date will be paid to the Persons in whose names the Designated
Securities  are  registered at the close of business on the Regular  Record Date
for such  interest,  which  shall be the May 1 or  November 1 (whether  or not a
Business Day), as the case may be, next preceding such Interest Payment Date.


                  The aggregate principal amount of Designated  Securities which
may be authenticated and delivered under this First Supplemental Indenture shall
be limited to $200,000,000,  except for Securities  authenticated  and delivered
upon  registration  of  transfer  of, or in exchange  for, or in lieu of,  other
Securities of the same series  pursuant to Section 304, 305, 306, 906 or 1107 of
the Indenture and except for any  Securities  which,  pursuant to Section 303 of
the  Indenture,  are  deemed  never to have  been  authenticated  and  delivered
hereunder and under the Indenture.

                  The  principal  of and interest on the  Designated  Securities
shall be payable at the Corporate  Trust Office,  at the office or agency of the
Company  in the City of New York,  the State of New  York,  maintained  for such
purpose,  and at any other office or agency  maintained  by the Company for such
purpose.

                  The Designated  Securities shall be entitled to the benefit of
Section 1006 (Limitation on Subordinated  Liens) and Section 1007 (Limitation on
Certain  Debt) as well as all other  covenants  set forth in the  Indenture.  In
addition,  the  Designated  Securities  shall be  entitled to the benefit of the
covenant set forth in Section 401 hereof.

                  The Designated  Securities shall be subject to both Defeasance
and Covenant Defeasance as provided in Article Thirteen of the Indenture.

                  The Designated  Securities  shall be issued in book entry form
only, in the form of one or more Global  Securities,  and the  Depositary  Trust
Company shall act as Depositary in respect thereof. Such Global Securities shall
bear legends as set forth in Section 201(c) hereof.

                  The Designated Securities may not be redeemed and shall not be
subject to any sinking fund.


                                  ARTICLE FOUR

                                   Covenants

Section 401.  Certain Sales of Assets.

                  In  the  event  the   Company  or  any  of  its   Subsidiaries
consummates  the sale or transfer of an asset or group of related  assets having
an  aggregate  fair  market  value  at the  time of such  sale or  transfer  (as
determined  in  good  faith  by  the  Board  of Directors,  whose  determination
thereof shall be conclusive) equal to or exceeding 7.5% of Consolidated  Assets,
other than in the  ordinary  course of business and sales or transfers of assets
to the  Company or a  Subsidiary  of the  Company  or other  entity in which the
Company or any Subsidiary owns 50% or more of the equity interest (a "Qualifying
Asset  Disposition"),  the net proceeds from such Qualifying  Asset  Disposition
shall within 360 days be: (i) invested or committed for  investment,  whether by
contract or resolution of the Board of Directors,  either  directly or through a
Subsidiary of the Company or other entity in which the Company or any Subsidiary
owns 50% or more of the equity  interest,  in any  natural  resource  or related
business   (including,   without   limitation,   the  production,   exploration,
extraction,  development, marketing or refining or further processing of natural
resources and the purchase lease or other  acquisition  of property,  equipment,
mines or  facilities  related  thereto) or (ii) used to acquire  the  Designated
Securities, repay any Senior Indebtedness of the Company or repay any debt which
is either  pari passu with the  Designated  Securities  or secured by the assets
sold or transferred.  Pending any such  application,  such net proceeds shall be
invested in Permitted Investments.

                  Notwithstanding the foregoing,  the Company shall be permitted
to use up to an aggregate of $50,000,000 of the net proceeds from all Qualifying
Asset Dispositions  after the date of the First  Supplemental  Indenture for any
purpose.


                                  ARTICLE FIVE

                                 Miscellaneous

Section 501.    Miscellaneous.

                  (a) The Trustee  accepts the trusts  created by the Indenture,
as supplemented by this First Supplemental Indenture,  and agrees to perform the
same upon the terms and conditions of the Indenture, as supplemented hereby.

                  (b) The recitals contained herein shall be taken as statements
of the Company, and the Trustee assumes no responsibility for their correctness.

                  (c) Each of the Company and the Trustee makes and reaffirms as
of the  date  of  execution  of this  First  Supplemental  Indenture  all of its
respective representations,  covenants and agreements set forth in the Indenture
as supplemented hereby.

                  (d) All  covenants and  agreements in this First  Supplemental
Indenture by the Company or the Trustee shall bind its respective successors and
assigns, whether so expressed or not.

                  (e)      Except as otherwise provided herein, the
Indenture shall remain in full force and effect in accor-
dance with its terms.

                  (f)      This First Supplemental Indenture shall have
effect only with respect to the Designated Securities.

                  (g) This First  Supplemental  Indenture  shall be deemed to be
incorporated  in,  and made a part of,  the  Indenture;  and the  Indenture,  as
supplemented  hereby,  shall be read,  taken and  construed  as one and the same
instrument.

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


                  In Witness Whereof,  the parties hereto have caused this First
Supplemental Indenture to be duly executed, and their respective corporate seals
to be hereunto affixed, all as of the day and year first above written.

[SEAL]                                   Magma Copper Company


                                         By...........................




[SEAL]                                   State Street Bank and Trust Company


                                         By...........................



State of _________                  )
                                    )  ss.:
County of ________                  )


                  On the  ....  day of May,  1995,  before  me  personally  came
...........................,  to me  known,  who,  being by me duly  sworn,  did
depose and say that he is  ...............  of Magma Copper Company,  one of the
corporations  described in and which executed the foregoing instrument;  that he
knows the seal of said corporation;  that the seal affixed to said instrument is
such  corporate  seal;  that it was so  affixed  by  authority  of the  Board of
Directors  of said  corporation;  and that he signed  his name  thereto  by like
authority.



                                 ...............................................


State of __________   )
                      )  ss.:
County of __________  )


                  On the  ....  day of May,  1995,  before  me  personally  came
...........................,  to me  known,  who,  being by me duly  sworn,  did
depose  and say that [he] is  ................  of State  Street  Bank and Trust
Company,  one of the corporations  described in and which executed the foregoing
instrument; that she knows the seal of said corpo- ration; that the seal affixed
to said  instrument is such corporate  seal; that it was so affixed by authority
of the Board of  Directors  of said  corporation;  and that she  signed her name
thereto by like authority.



                                 ...............................................



                            Form of Note Certificate

                  [Insert any legend  required by the Internal  Revenue Code and
the regulations thereunder.]

                              MAGMA COPPER COMPANY

                              ....................

No. .........                                                         $ ........

                  Magma  Copper  Company,   a  corporation  duly  organized  and
existing under the laws of Delaware  (herein  called the  "Company",  which term
includes any successor Person under the Indenture  hereinafter referred to), for
value received, hereby promises to pay  to.................................,  or
registered  assigns,  the principal sum  of................  ...................
Dollars  on  ............................  ...........................  [if  the
Security is to bear interest prior to Maturity,  insert -- , and to pay interest
thereon  from  .............  or from the most recent  Interest  Payment Date to
which interest has been paid or duly provided for, semi-annually on ............
and ............  in each year, commencing  .........,  at the rate of ....% per
annum,  until the  principal  hereof is paid or made  available  for payment [if
applicable,  insert -- , provided that any  principal and premium,  and any such
installment  of interest,  which is overdue  shall bear  interest at the rate of
....%  per annum (to the  extent  that the  payment  of such  interest  shall be
legally enforceable), from the dates such amounts are due until they are paid or
made available for payment,  and such interest shall be payable on demand].  The
interest so payable,  and punctually  paid or duly provided for, on any Interest
Payment Date will, as provided in such Indenture, be paid to the Person in whose
name this Security (or one or more Predecessor  Securities) is registered at the
close of business on the Regular Record Date for such  interest,  which shall be
the ....... or ....... (whether or not a Business Day), as the case may be, next
preceding such Interest  Payment Date. Any such interest not so punctually  paid
or duly  provided for will  forthwith  cease to be payable to the Holder on such
Regular  Record  Date and may  either be paid to the  Person in whose  name this
Security (or one or more  Predecessor  Securities) is registered at the close of
business on a Special Record Date for the payment of such Defaulted  Interest to
be fixed by the Trustee,  notice whereof shall be given to Holders of Securities
of this series not less than 10 days prior to such Special  Record  Date,  or be
paid  at any  time  in  any  other  lawful  manner  not  inconsistent  with  the
requirements  of any securities  exchange on which the Securities of this series
may be listed, and upon such notice as may be required by such exchange,  all as
more fully provided in said Indenture].

                  [If the  Security is not to bear  interest  prior to Maturity,
insert -- The principal of this Security  shall not bear interest  except in the
case of a default in payment of principal upon acceleration,  upon redemption or
at  Stated  Maturity  and in such case the  overdue  principal  and any  overdue
premium  shall bear  interest at the rate of ....% per annum (to the extent that
the payment of such interest shall be legally enforceable),  from the dates such
amounts are due until they are paid or made  available for payment.  Interest on
any overdue  principal or premium shall be payable on demand.  Any such interest
on any overdue  principal  or premium  which is not so paid on demand shall bear
interest  at the rate of ......%  per annum (to the extent  that the  payment of
such interest shall be legally enforceable), from the dates such amounts are due
until they are paid or made available for payment.
Interest on any overdue interest shall be payable on demand.]

                  Payment  of the  principal  of (and  premium,  if any) and [if
applicable,  insert -- any such] interest on this Security will be made upon its
presentation for notation of any principal  payment,  or, in the case of a final
payment,  its  surrender at the office or agency of the Company  maintained  for
that purpose in  ............,  in such coin or currency of the United States of
America  as at the time of payment  is legal  tender  for  payment of public and
private debts [if applicable,  insert -- ; provided, however, 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 such  address  shall  appear in the  Security
Register].

                  Reference  is hereby  made to the further  provisions  of this
Security set forth on the reverse hereof, which further provisions shall for all
purposes have the same effect as if set forth at this place.

                  Unless  the  certificate  of  authentication  hereon  has been
executed by the Trustee  referred to on the reverse hereof by manual  signature,
this  Security  shall not be entitled to any benefit  under the  Indenture or be
valid or obligatory for any purpose.

                  IN WITNESS WHEREOF,  the Company has caused this instrument to
be duly executed under its corporate seal.

Dated:


                                                       MAGMA COPPER COMPANY

                                                       By.....................

Attest:

...........................


Section 203.   Form of Reverse of Security

                  This Security is one of a duly authorized  issue of securities
of the Company (herein called the "Securities"),  issued and to be issued in one
or more series under an Indenture,  dated as of May 15, 1995 (herein  called the
"Indenture",  which  term  shall  have  the  meaning  assigned  to  it  in  such
instrument),  between the Company and State  Street Bank and Trust  Company,  as
Trustee (herein called the "Trustee",  which term includes any successor trustee
under the  Indenture),  and  reference  is hereby  made to the  Indenture  for a
statement of the respective rights, limitations of rights, duties and immunities
thereunder of the Company,  the Trustee and the Holders of the Securities and of
the terms  upon  which the  Securities  are,  and are to be,  authenticated  and
delivered.  This Security is one of the series designated on the face hereof [if
applicable, insert --, limited in aggregate principal amount to $...........].

                  [If applicable,  insert -- Subject to and upon compliance with
the provisions of the Indenture, the Holder of this Security is entitled, at his
option,  at any time on or before the close of  business on  ___________,  or in
case this Security or a portion hereof is called for redemption, then in respect
of this  Security or such portion  hereof until and  including,  but (unless the
Company defaults in making the payment due upon redemption) not after, the close
of business on the date prior to the  Redemption  Date, to convert this Security
(or any portion of the  principal  amount  hereof which is $1,000 or an integral
multiple  thereof),  at the principal  amount hereof,  or of such portion,  into
fully paid and  non-assessable  shares  (calculated as to each conversion to the
nearest  1/100 of a share) of Common Stock of the Company at a conversion  price
per share of Common  Stock  equal to $___ per each share of Common  Stock (or at
the current adjusted conversion price if an adjustment has been made as provided
in the  Indenture) by surrender of this  Security,  duly endorsed or assigned to
the Company or in blank, to the Company at its office or agency in ____________,
accompanied  by written  notice to the Company that the Holder  hereof elects to
convert this Security,  or if less than the entire principal amount hereof is to
be converted,  the portion  hereof to be converted,  and, in case such surrender
shall be made during the period from the close of business on any Regular Record
Date next preceding any Interest Payment Date to the opening of business on such
Interest  Payment  Date  (unless  this  Security  or the portion  thereof  being
converted  has been  called for  redemption  on a  Redemption  Date  within such
period),  also  accompanied by payment in New York Clearing House funds or other
funds  acceptable  to the Company of an amount equal to the interest  payable on
such Interest  Payment Date on the principal  amount of this Security then being
converted.  Subject to the aforesaid requirement for payment and, in the case of
a conversion  after the Regular Record Date next preceding any Interest  Payment
Date and on or before such Interest  Payment Date, to the right of the Holder of
this  Security (or any  Predecessor  Security) of record at such Regular  Record
Date to receive an instalment of interest (with certain  exceptions  provided in
the  Indenture),  no  payment  or  adjustment  is to be made on  conversion  for
interest  accrued  hereon  or  for  dividends  on the  Common  Stock  issued  on
conversion.  No  fractions of shares of scrip  representing  fractions of shares
will be issued on conversion, but instead of any fractional interest the Company
shall pay a cash adjustment as provided in the Indenture.  The conversion  price
is  subject to  adjustment  as  provided  in the  Indenture.  In  addition,  the
Indenture  provides that in case of certain  consolidations  or mergers to which
the Company is a party or the transfer of substantially all of the assets of the
Company,  the Indenture shall be amended,  without the consent of any Holders of
Securities,  so that this  Security,  if then  outstanding,  will be convertible
thereafter,  during the period this Security  shall be  convertible as specified
above,  only into the kind and  amount of  securities,  cash and other  property
receivable upon the consolidation,  merger or transfer by a holder of the number
of shares of Common  Stock into which this  Security  might have been  converted
immediately  prior to such  consolidation,  merger or  transfer  (assuming  such
holder of Common  Stock  failed to exercise  any rights of election and received
per share the kind and amount  received per share by a plurality of non-electing
shares).]


                  [If  applicable,  insert -- The  Securities of this series are
subject  to  redemption  upon  not  less  than 30  days'  notice  by  mail,  [if
applicable,  insert -- (1) on ...........  in any year  commencing with the year
...... and ending with the year ...... through operation of the sinking fund for
this series at a Redemption  Price equal to 100% of the  principal  amount,  and
(2)] at any time [if applicable,  insert -- on or after ..........,  19..], as a
whole or in part, at the election of the Company,  at the  following  Redemption
Prices  (expressed  as  percentages  of the principal  amount):  If redeemed [if
applicable, insert -- on or before ..............., __%, and if redeemed] during
the 12-month period beginning ............. of the years indicated,

                 Redemption                                   Redemption
Year               Price                   Year                 Price
----             ----------                ----               ----------













and  thereafter at a Redemption  Price equal to .....% of the principal  amount,
together in the case of any such redemption [if  applicable,  insert -- (whether
through operation of the sinking fund or otherwise)] with accrued interest up to
but not including the Redemption  Date, but interest  installments  whose Stated
Maturity is on or prior to such  Redemption  Date will be payable to the Holders
of such  Securities,  or one or more  Predecessor  Securities,  of record at the
close of business on the relevant  Record Dates  referred to on the face hereof,
all as provided in the Indenture.]

                  [If  applicable,  insert -- The  Securities of this series are
subject  to  redemption  upon not  less  than 30 days'  notice  by mail,  (1) on
............  in any year commencing with the year .... and ending with the year
....  through  operation of the sinking  fund for this series at the  Redemption
Prices for  redemption  through  operation  of the sinking  fund  (expressed  as
percentages  of the principal  amount) set forth in the table below,  and (2) at
any time [if applicable,  insert -- on or after ............],  as a whole or in
part, at the election of the Company,  at the  Redemption  Prices for redemption
otherwise than through  operation of the sinking fund  (expressed as percentages
of the principal  amount) set forth in the table below:  If redeemed  during the
12-month period beginning ............ of the years indicated,

                     Redemption Price
                      For Redemption                     Redemption Price For
                     Through Operation                   Redemption Otherwise
                          of the                        Than Through Operation
Year                   Sinking Fund                      of the Sinking Fund
----                 -----------------                  ----------------------














and  thereafter at a Redemption  Price equal to .....% of the principal  amount,
together in the case of any such redemption  (whether  through  operation of the
sinking fund or  otherwise)  with accrued  interest up to but not  including the
Redemption Date, but interest  installments whose Stated Maturity is on or prior
to such  Redemption Date will be payable to the Holders of such  Securities,  or
one or more  Predecessor  Securities,  of record at the close of business on the
relevant  Record Dates  referred to on the face  hereof,  all as provided in the
Indenture.]

                  [If  applicable,  insert -- The  sinking  fund for this series
provides for the redemption on ............ in each year beginning with the year
.......  and ending with the year ...... of [if  applicable,  insert -- not less
than  $..........  ("mandatory  sinking  fund")  and not more  than]  $.........
aggregate  principal  amount of  Securities  of this series.  Securities of this
series  acquired  or  redeemed  by  the  Company   otherwise  than  through  [if
applicable,  insert --mandatory] sinking fund payments [if applicable, insert --
and Securities  surrendered for conversion] may be credited  against  subsequent
[if applicable, insert -- mandatory] sinking fund payments otherwise required to
be made [if  applicable,  insert -- in the  inverse  order in which they  become
due].]

                  [If the Security is subject to redemption of any kind,  insert
-- In the event of redemption [if  applicable,  insert -- or conversion] of this
Security in part only, a new Security or  Securities  of this series and of like
tenor for the  unredeemed  [if  applicable,  insert -- or  unconverted]  portion
hereof  will be issued in the name of the Holder  hereof  upon the  cancellation
hereof.]

                  The indebtedness  evidenced by this Security is, to the extent
provided in the  Indenture,  subordinate  and subject in right of payment to the
prior  payment in full of all Senior  Indebtedness,  and this Security is issued
subject to the provisions of the Indenture with respect thereto.  Each Holder of
this  Security,  by accepting the same, (a) agrees to and shall be bound by such
provisions,  (b) authorizes and directs the Trustee on his behalf to take action
as may be necessary or appropriate to effectuate the  subordination  so provided
and (c) appoints the Trustee his attorney-in-fact for any and all such purposes.

                  [If applicable,  insert -- The Indenture  contains  provisions
for defeasance at any time of [(1) the entire  indebtedness  of this Security or
(2)] certain  restrictive  covenants  and Events of Default with respect to this
Security,  in each case upon compliance with certain conditions set forth in the
Indenture.]

                  [If the Security is not an Original Issue  Discount  Security,
insert -- If an Event of Default with respect to Securities of this series shall
occur and be  continuing,  the principal of the Securities of this series may be
declared  due and  payable in the manner  and with the  effect  provided  in the
Indenture.]

                  [If the  Security  is an  Original  Issue  Discount  Security,
insert -- If an Event of Default with respect to Securities of this series shall
occur and be continuing, an amount of principal of the Securities of this series
may be declared  due and  payable in the manner and with the effect  provided in
the Indenture.  Such amount shall be equal to -- insert formula for  determining
the amount.  Upon  payment (i) of the amount of  principal  so declared  due and
payable and (ii) of interest on any overdue principal,  premium and interest (in
each case to the  extent  that the  payment  of such  interest  shall be legally
enforceable),  all of the Company's obligations in respect of the payment of the
principal  of and  interest,  if any, on the  Securities  of this  series  shall
terminate.]

                  The  Indenture  permits,  with certain  exceptions  as therein
provided,  the  amendment  thereof  and  the  modification  of  the  rights  and
obligations  of the Company and the rights of the Holders of the  Securities  of
each series to be affected  under the  Indenture  at any time by the Company and
the Trustee with the consent of the Holders of a majority in principal amount of
the  Securities  at the time  Outstanding  of each  series to be  affected.  The
Indenture  also  contains   provisions   permitting  the  Holders  of  specified
percentages  in principal  amount of the  Securities  of each series at the time
Outstanding, on behalf of the Holders of all Securities of such series, to waive
compliance  by the Company with certain  provisions of the Indenture and certain
past defaults  under the Indenture and their  consequences.  Any such consent or
waiver by the Holder of this Security  shall be conclusive and binding upon such
Holder and upon all future  Holders of this Security and of any Security  issued
upon the  registration  of  transfer  hereof or in  exchange  herefor or in lieu
hereof,  whether  or not  notation  of such  consent or waiver is made upon this
Security.

                  As provided in and subject to the provisions of the Indenture,
the Holder of this Security shall not have the right to institute any proceeding
with respect to the Indenture or for the appointment of a receiver or trustee or
for any other remedy thereunder,  unless such Holder shall have previously given
the Trustee written notice of a continuing  Event of Default with respect to the
Securities of this series,  the Holders of not less than 25% in principal amount
of the Securities of this series at the time Outstanding shall have made written
request to the  Trustee  to  institute  proceedings  in respect of such Event of
Default as Trustee and offered the Trustee reasonable  indemnity and the Trustee
shall not have  received  from the Holders of a majority in principal  amount of
Securities of this series at the time Outstanding a direction  inconsistent with
such  request,  and shall have failed to institute any such  proceeding,  for 60
days after receipt of such notice, request and offer of indemnity. The foregoing
shall not apply to any suit  instituted  by the Holder of this  Security for the
enforcement of any payment of principal hereof or any premium or interest hereon
on or after the respective due dates expressed herein.

                  Subject to the rights of  holders of Senior  Indebtedness,  as
set forth in the Indenture,  no other  reference  herein to the Indenture and no
other  provision of this Security or of the Indenture  shall alter or impair the
obligation  of the  Company,  which is absolute  and  unconditional,  to pay the
principal of and any premium and interest on this  Security at the times,  place
and rate, and in the coin or currency, herein prescribed [if applicable,  insert
-- or to convert this Security as provided in the Indenture].

                  As   provided  in  the   Indenture   and  subject  to  certain
limitations  therein set forth, the transfer of this Security is registerable in
the Security  Register,  upon  surrender of this  Security for  registration  of
transfer at the office or agency of the Company in any place where the principal
of and any premium and interest on this Security are payable,  duly endorsed by,
or accompanied by a written  instrument of transfer in form  satisfactory to the
Company and the Security  Registrar  duly  executed by, the Holder hereof or his
attorney duly authorized in writing, and thereupon one or more new Securities of
this  series and of like tenor,  of  authorized  denominations  and for the same
aggregate  principal  amount,  will be issued to the  designated  transferee  or
transferees.

                  The  Securities of this series are issuable only in registered
form  without  coupons  in  denominations  of $1,000 and any  integral  multiple
thereof. As provided in the Indenture and subject to certain limitations therein
set forth,  Securities  of this  series are  exchangeable  for a like  aggregate
principal  amount of  Securities of this series and of like tenor of a different
authorized denomination, as requested by the Holder surrendering the same.

                  No service charge shall be made for any such  registration  of
transfer or exchange, but the Company may require payment of a sum sufficient to
cover any tax or other governmental charge payable in connection therewith.

                  Prior to due presentment of this 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 this  Security  is  registered  as the owner
hereof for all purposes,  whether or not this  Security be overdue,  and neither
the  Company,  the Trustee nor any such agent shall be affected by notice to the
contrary.

                  All  terms  used in this  Security  which are  defined  in the
Indenture shall have the meanings assigned to them in the Indenture.

                  [If applicable, insert --

                          [FORM OF CONVERSION NOTICE]

To:  MAGMA COPPER COMPANY


         The undersigned owner of this Security hereby irrevocably exercises the
option to  convert  this  Security,  or  portion  hereof  (which is $1,000 or an
integral  multiple  thereof)  below  designated,  into shares of Common Stock of
Magma Copper Company in accordance  with the terms of the Indenture  referred to
in this Security,  and directs that the shares issuable and deliverable upon the
conversion,  together  with any check in payment for  fractional  shares and any
Securities,  representing any unconverted principal amount hereof, be issued and
delivered  to the  registered  holder  hereof  unless a different  name has been
indicated  below.  If shares are to be issued in the name of a person other than
the  undersigned,  the  undersigned  will pay all  transfer  taxes  payable with
respect thereto. Any amount required to be paid by the undersigned on account of
interest accompanies this Security.

Dated:

Fill in for registration 
  of shares of Common Stock and
  Securities if to be issued
  otherwise than to the 
  registered holder.
                                                     Principal Amount to be
                                                     converted (in an integral
                                                     multiple of $1,000, if 
                                                     less than all):  
                                                                    $
_____________________________
          Name

_____________________________
        Address

_____________________________                        _________________________
(Please print name and                                       Signature
address, including zip code
number)


SOCIAL SECURITY OR OTHER
  TAXPAYER IDENTIFYING
         NUMBER
                                                     [SIGNATURE GUARANTEED* --
                                                     required only if Common
                                                     Stock and Securities are to
                                                     be issued and delivered to
                                                     other than the registered
                                                     holder]
                                                     __________________________]
                                                     * Participant in a
                                                     recognized Signature
                                                     Medallion Program (or other
                                                     signature guarantee program
                                                     acceptable
                                                     to the Trustee)





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