CORNERSTONE PROPERTIES INC
8-K, 1996-12-12
REAL ESTATE
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                      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

                               November 8, 1996
                      (Date of earliest event reported)

                         CORNERSTONE PROPERTIES INC.
            (Exact name of registrant as specified in its charter)


            Nevada                  0-10421            74-2170858
(State or other jurisdiction of   (Commission       (I.R.S. Employer
        incorporation)           File Number)      Identification No.)

                                   Tower 56
                             126 East 56th Street
                              New York, NY 10022
                   (Address of principal executive offices)


                                (212) 605-7100
                       (Registrant's telephone number,
                             including area code)





<PAGE>




Item 2.       Acquisition or Disposition of Assets.

     On November 8, 1996,  through a merger of subsidiaries,  the Company issued
$66,500,000  of 8% Cumulative  Convertible  Preferred  Stock Series A to Hexalon
Real Estate,  Inc.  ("Hexalon") in a transaction  exempt from registration under
Section 4(2) of the  Securities  Act of 1933.  The result of the  transaction is
that the Company  acquired  $40,000,000  cash and the Frick Building  located in
Pittsburgh, Pennsylvania. The Frick Building is a twenty story, Class A landmark
building, containing 341,421 square feet of rentable area. Hexalon, a large real
estate  investment  trust,  took the  preferred  shares (which are legended) for
investment. The preferred shares are convertible into the Company's Common Stock
at a conversion price of $14.50 per share, subject to antidilution provisions.

     Also on November 8, 1996, the Company acquired One Lincoln Centre,  located
in Oakbrook Terrace, Illinois for a purchase price of approximately $49,950,000.
One Lincoln  Centre is a Class A,  sixteen  story office  building  with 297,330
square feet of  rentable  area and a 1,056  stall,  five level  parking  garage.
Cornerstone used the proceeds from the Preferred Stock placement discussed above
and general corporate funds to finance the purchase of One Lincoln Centre.


Item 5.       Other Events

     On November  22,  1996 the Company  issued  $100,000,000  of 8%  Cumulative
Convertible  Preferred Stock to New York State Teachers'  Retirement System in a
transaction exempt from registration under Section 4(2) of the Securities Act of
1933. The preferred  shares are convertible into the Company's Common Stock at a
conversion price of $14.50 per share subject to antidilution provisions.


Item 7.       Financial Statements and Exhibits.

           (a) and (b)  Financial Statements of Property Acquired and Pro
                        Forma Financial Information

      It is impracticable to provide the required  financial  statements and pro
forma  financial  information  relating  to The Frick  Building  and One Lincoln
Centre at this time. The required material will be filed as an amendment to this
Form  8-K as soon as  practicable,  but no  later  than 60 days  after  the date
hereof.

           (c)          Exhibits

           2.1  AGREEMENT  AND PLAN OF  MERGER,  dated as of  November  7, 1996,
                among  Cornerstone  Properties  Inc.,  CStone-Pittsburgh  Trust,
                Frick Building, Inc., and Hexalon Real Estate, Inc.

           2.2  PREFERRED  STOCK  PURCHASE  AGREEMENT,  dated as of November 22,
                1996,  between  CORNERSTONE  PROPERTIES  INC.,  and the NEW YORK
                STATE TEACHERS' RETIREMENT SYSTEM.

           4.1  CERTIFICATE OF DESIGNATIONS OF THE VOTING POWERS,
                DESIGNATION, PREFERENCES AND RELATIVE, PARTICIPATING,
                OPTIONAL OR OTHER SPECIAL RIGHTS AND QUALIFICATIONS,
                LIMITATIONS AND RESTRICTIONS OF THE 8% CUMULATIVE CONVERTIBLE
                PREFERRED STOCK OF CORNERSTONE PROPERTIES INC.

           4.2  CERTIFICATE OF THE DESIGNATIONS,  VOTING POWERS, PREFERENCES AND
                RELATIVE,  PARTICIPATING,  OPTIONAL AND OTHER SPECIAL RIGHTS AND
                QUALIFICATIONS,  LIMITATIONS  OR  RESTRICTIONS  OF 8% CUMULATIVE
                CONVERTIBLE PREFERRED STOCK, SERIES A OF CORNERSTONE  PROPERTIES
                INC.

           20.1 STOCKHOLDERS'  AGREEMENT,  dated as of November 22, 1996, by and
                among CORNERSTONE  PROPERTIES INC., the NEW YORK STATE TEACHERS'
                RETIREMENT  SYSTEM  together with any other the purchasers of 8%
                Preferred Stock.

           20.2 STOCKHOLDERS'  AGREEMENT,  dated as of November 7, 1996,  by and
                between  CORNERSTONE  PROPERTIES  INC., and HEXALON REAL ESTATE,
                INC., and together with any other  purchaser(s)  of 8% Preferred
                Stock Series A.

           99.1 News release by Cornerstone Properties Inc. dated November 22,
                1996.



<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 thereunto duly authorized.


                           CORNERSTONE PROPERTIES INC.
                              (Registrant)


                       By:  /s/ John S. Moody 
                            John S. Moody, President and Chief Executive Officer

                             Date: December 12, 1996




                       By: /s/ Thomas P. Loftus   
                               Thomas P. Loftus, Vice President and Controller
                               (Principal Financial Officer)

                             Date: December 12, 1996





EXHIBIT 2.1


            AGREEMENT  AND PLAN OF MERGER,  dated as of  November  7, 1996 (this
"Agreement"),  among  Cornerstone  Properties  Inc., a Nevada  corporation  (the
"Parent"), CStone-Pittsburgh Trust, a Maryland business trust and a wholly owned
subsidiary of the Parent ("Sub"),  Frick Building,  Inc., a Delaware corporation
(the "Company"), and Hexalon Real Estate, Inc., a Delaware corporation, the sole
stockholder of the Company (the "Stockholder").

            WHEREAS,  the Board of Trustees of Sub and the respective  Boards of
Directors of the Parent,  the Company and the  Stockholder  each have determined
that it is in the best interests of their respective  companies and stockholders
for Sub and the  Company to merge upon the terms and  subject to the  conditions
set forth  herein  (the  "Merger")  and the  Parent,  Sub,  the  Company and the
Stockholder  have,  by duly  adopted  resolutions,  approved  and  adopted  this
Agreement; and

            WHEREAS,  to induce the Parent and Sub to enter into this Agreement,
the  Stockholder  has  agreed  to  enter  into a  stockholders'  agreement  (the
"Stockholders'  Agreement"),  in  the  form  set  forth  as  Exhibit  A  hereto,
simultaneously with the closing of the Merger;

            NOW, THEREFORE, in consideration of the representations, warranties,
covenants and agreements set forth herein, the parties hereto agree as follows:


                            ARTICLE I.  DEFINITIONS

            Section 1.01. DefinitionsDefinitions. As used in this Agreement, the
following terms shall have the following meanings:

            "Account" means that certain account no. 8801721955 established
      at SunTrust Bank in the name of Frick Building, Inc.

            "Basic Agreements" means this Agreement and the Stockholders'
      Agreement.

            "Capital  Stock"  means,  with  respect to any  Person,  any and all
      shares, interests, participation or other equivalents (however designated)
      of such Person's  capital stock and all joint venture  interests  (however
      designated)  whether now  outstanding  or issued  after the Closing  Date,
      including, without limitation, all common stock and all preferred stock.

            "Capitalized  Lease" means,  as applied to the Parent,  any lease of
      property (whether real, personal or mixed) the discounted present value of
      the rental  obligations of the Parent as lessee under which, in conformity
      with GAAP,  is required to be or is  capitalized  on the balance  sheet of
      that Person.

            "Certificate of Merger" has the meaning specified in Section 2.02.

            "Charter" means the Certificate of Incorporation  of the Parent,  as
      amended or restated from time to time.

            "Closing" has the meaning specified in Section 2.02.

            "Closing Date" has the meaning specified in Section 2.02.

            "Closing Statement" has the meaning specified in
      Section 3.03(a)(x).

            "Commission" means the United States Securities and Exchange
      Commission.

            "Common Stock" means the common stock of the Parent, without par
      value.

            "Company Note" means the Demand  Promissory  Note,  dated as of July
      31, 1989, of the Company to Stockholder in the original  principal  amount
      of $36,000,000.

            "Company Shares" has the meaning specified in Section 2.06.

            "Contract Rights" means any and all rights of the Company in and
      to the Contracts.

            "Contracts" means all service,  maintenance,  supply,  construction,
      utility  and  management   contracts  affecting  the  construction,   use,
      ownership,   maintenance  and/or  operation  of  the  Property  (including
      contracts for the construction of tenant improvements).

            "Conversion  Shares"  means  the  Common  Stock or other  securities
      issued upon conversion of the 8% Preferred Stock, Series A.

            "Currency  Agreement" means any foreign exchange contract,  currency
      swap  agreement  or other  similar  agreement or  arrangement  designed to
      protect the Parent against fluctuations in currency values.

            "Debt" of the Parent means, at any date (without  duplication):  (i)
      all obligations of the Parent for borrowed money;  (ii) all obligations of
      the  Parent  evidenced  by  bonds,  debentures,  notes  or  other  similar
      instruments;  (iii) all obligations of the Parent in respect of letters of
      credit,   bankers'   acceptances   or  other   similar   instruments   (or
      reimbursement  obligations with respect thereto);  (iv) all obligations of
      the Parent to pay the deferred purchase price of property or services (but
      excluding  trade accounts  payable or accrued  liabilities  arising in the
      ordinary course of business which are not overdue); (v) all obligations of
      the Parent as lessee under Capitalized Leases; (vi) all obligations of the
      Parent in respect of performance bonds or other similar instruments; (vii)
      all  obligations of others of the types referred to in clauses (i) through
      (vi),  (viii) and (ix) of this paragraph secured by a Lien on any asset of
      the Parent,  whether or not any such  obligation is assumed by the Parent,
      provided that,  for purposes of determining  the amount of any Debt of the
      type described in this clause (vii), if recourse with respect to such Debt
      is limited to such asset,  the amount of such Debt shall be limited to the
      Fair Market Value of such assets;  (viii) all obligations of others of the
      types  referred to in clauses (i) through (vi) and (ix) of this  paragraph
      which are  guaranteed by the Parent;  and (ix) to the extent not otherwise
      included,   obligations  under  Currency   Agreements  and  Interest  Rate
      Agreements.

            "Delaware Law" means the Delaware General Corporation Law.

            "Effective Time" has the meaning specified in Section 2.02.

            "8% Preferred Stock" means the 8% Cumulative  Convertible  Preferred
      Stock of the Parent, without par value, to be issued hereafter.

            "8% Preferred Stock Series A" has the meaning specified in
      Section 2.06.

            "Environmental Laws" has the meaning specified in
      Section 3.05(a)(vii).

            "Executive Summary" has the meaning specified in Section 5.01(i).

            "GAAP" means generally accepted accounting  principles in the United
      States as in effect at the time any particular determination is made.

            "Hazardous Materials" has the meaning specified in
      Section 3.05(a)(vii).

            "Improvements" means all buildings and other improvements located on
      or affixed to the Land, including,  without limitation,  a 21-story office
      building  with ground  floor  retail  space  known as the Frick  Building,
      Pittsburgh, Pennsylvania,  containing approximately 341,421 square feet of
      net rentable area, and any and all utility, plumbing, electrical, heating,
      air-conditioning and ventilation lines, systems and boilers.

            "Incurrence" means the issuance, incurrence, creation, assumption or
      in any other manner  becoming  liable with respect to, or the extension of
      the maturity or mandatory  redemption date of, or becoming responsible for
      the payment of, any Debt,  Preferred Stock or Lien. "Incur" and "Incurred"
      shall have correlative meanings.

            "Intangible  Rights"  means all  right,  title and  interest  of the
      Company,  if  any,  in  and to  intangible  and  mixed  property  used  in
      connection  with or  relating to the Real  Property or Personal  Property,
      including without limitation all third-party representations,  warranties,
      guarantees,   indemnities,   bonds,  approvals,  licenses,   applications,
      permits,  plans,  drawings,  specifications,  surveys,  maps,  engineering
      reports and other technical  descriptions,  environmental  reports,  trade
      names and trademarks,  telephone numbers and similar property,  other than
      the Contract Rights and the Leases.

            "Interest  Rate  Agreements"  means  any  interest  rate  protection
      agreement, interest rate future, interest rate option, interest rate swap,
      interest  rate cap or other  interest  rate hedge  agreement,  to or under
      which the Parent is a party or a beneficiary on the date hereof or becomes
      a party or a beneficiary hereafter.

            "Land" means that certain parcel of land in Pittsburgh, Pennsylvania
      more particularly described on Exhibit R-A attached hereto,  together with
      all rights, easements, and interests appurtenant thereto.

            "Leases" means all of the leases,  occupancy agreements and licenses
      of space in the Real Property,  together with any amendments of any of the
      foregoing or any related agreements,  including  brokerage  agreements and
      guaranties.

            "Lien" means any pledge,  mortgage,  lien, charge, security interest
      or encumbrance of any kind.

            "Maryland Law" means Title 8 of Corporations and Associations
      Annoted Code of Maryland.

            "Material  Adverse Effect" means for any entity,  a material adverse
      effect on the business, operations,  properties or condition (financial or
      otherwise) of such entity and its Subsidiaries, taken as a whole.

            "1934 Act" shall mean the United States  Securities  Exchange Act of
      1934, as amended,  and, unless the context indicates otherwise,  the rules
      and regulations of the Commission thereunder,  all as the same shall be in
      effect from time to time.

            "1933 Act" shall mean the United States  Securities  Act of 1933, as
      amended,  and,  unless  the  context  indicates  otherwise,  the rules and
      regulations  of the  Commission  thereunder,  all as the same  shall be in
      effect from time to time.

            "Person" means an  individual,  a  partnership,  a joint venture,  a
      corporation,  an association, a trust, an individual retirement account or
      any other entity or organization, including a government or any department
      or agency thereof.

            "Personal  Property"  means all  right,  title and  interest  of the
      Company in and to the tangible  personal property of the Company listed in
      Exhibit R-B and any other tangible  personal  property of the Company used
      in connection with the operation and/or  maintenance of the Real Property,
      including   without   limitation  all  furniture,   fixtures,   equipment,
      machinery,  furnishings,  carpets, drapes, blinds and mini-blinds, service
      and   maintenance   equipment,   tools,   signs,   telephones   and  other
      communication equipment, intercom equipment and systems.

            "Property" means the Real Property, the Personal Property, the
      Intangible Rights, the Leases, and the Contract Rights.

            "Real Property" means the Land and the Improvements.

            "Rent Roll" has the meaning specified in Section 3.03(a)(i).

            "7% Preferred Stock" means the 7% Cumulative  Convertible  Preferred
      Stock of the Parent, without par value.

            "Stockholder Knowledge Individuals" has the meaning specified in
      Section 3.05(b).

            "Subsidiary"  means, as to any entity,  any company,  corporation or
      joint venture of which at the time of determination such entity,  directly
      and/or indirectly through one or more  Subsidiaries,  owns, or one or more
      other  Subsidiaries  own, more than 50% of the Voting Stock or such entity
      controls,  or one or more other Subsidiaries  control,  the composition of
      more than 50% of the  board of  directors  or  comparable  governing  body
      thereof.

            "Surviving Corporation" has the meaning specified in Section 2.01.

            "Taxes" mean all taxes, however denominated, including any interest,
      penalties  or other  additions  to tax that may become  payable in respect
      thereof,  imposed by any  federal,  territorial,  state,  local or foreign
      government or any agency or political  subdivision of any such government,
      which  taxes  shall  include,  without  limiting  the  generality  of  the
      foregoing,  all income or profits  taxes  (including,  but not limited to,
      federal income taxes and state income  taxes),  real property gains taxes,
      payroll and employee  withholding  taxes,  unemployment  insurance  taxes,
      social security (or similar) taxes, sales and use taxes, ad valorem taxes,
      excise taxes,  franchise  taxes,  gross receipts taxes,  business  license
      taxes,  occupation taxes,  real and personal property taxes,  stamp taxes,
      environmental  taxes,  transfer  taxes,  workers'  compensation,   Pension
      Benefit  Guaranty  Corporation  premiums and other  governmental  charges,
      alternative or add-on  minimum taxes and other  obligations of the same or
      of a similar  nature to any of the  foregoing,  whether  disputed  or not,
      which the applicable party is required to pay, withhold or collect.

            "Tenant Estoppels" has the meaning specified in
      Section 3.03(a)(v).

            "Title Company" means Lawyers Title Insurance Company.

            "Voting Stock" means, with respect to any Person,  securities of any
      class or classes of Capital  Stock of such  Person  entitling  the holders
      thereof  (whether at all times or only so long as no senior class of stock
      has voting power by reason of any  contingency) to vote in the election of
      members of the board of directors or other  governing  body of such Person
      but  does not  include  Capital  Stock  having  the  right to vote in such
      election solely upon the happening of a contingency  unless and until such
      contingency has occurred,  and then only so long as such Capital Stock has
      voting rights with respect thereto.


                            ARTICLE II.  THE MERGER

            Section 2.01.  The MergerThe  Merger.  Upon the terms and subject to
the conditions set forth in Section 3.03 and Article IV, and in accordance  with
Maryland Law and Delaware Law, at the Effective Time the Company shall be merged
with and into Sub. As a result of the Merger, the separate  corporate  existence
of the Company shall cease and Sub shall  continue as the surviving  corporation
of the Merger (the "Surviving Corporation").

            Section 2.02.  Effective Time;  ClosingEffective  Time;  Closing. As
promptly as practicable after the satisfaction or, if permissible, waiver of the
conditions set forth in Article IV, the parties hereto shall cause the Merger to
be  consummated  by filing  this  Agreement  or a  certificate  of  merger  (the
"Certificate of Merger") with the Secretaries of State of Maryland and Delaware,
in such form as is required  by, and  executed in  accordance  with the relevant
provisions of,  Maryland Law and Delaware Law (the date and time of the later of
such filings being the "Effective Time"). Prior to such filings, a closing shall
be held at the offices of Shearman & Sterling,  599 Lexington Avenue,  New York,
New York 10022, on November 7, 1996, or such other place and date as the parties
shall agree,  for the purpose of confirming the  satisfaction or waiver,  as the
case may be, of the  conditions  set forth in Section  3.03 and Article IV (such
closing  being  called the  "Closing"  and such date being  called the  "Closing
Date").

            Section  2.03.  Effect of the  MergerEffect  of the  Merger.  At the
Effective  Time, the effect of the Merger shall be as provided in the applicable
provisions of Maryland Law and Delaware Law.  Without limiting the generality of
the  foregoing,  and subject  thereto,  at the Effective  Time all the property,
rights, privileges,  powers and franchises of the Sub and the Company shall vest
in  the  Surviving  Corporation,   and  all  debts,  liabilities,   obligations,
restrictions,  disabilities  and duties of the Company and Sub shall  become the
debts, liabilities,  obligations,  restrictions,  disabilities and duties of the
Surviving Corporation.

            Section  2.04.   Certificate  of  Formation;   BylawsCertificate  of
Formation;  Bylaws.  (a) At the Effective  Time, the Certificate of Formation of
the Surviving  Corporation  shall be as set forth in Exhibit B, until thereafter
amended as provided by law and such Certificate of Formation.

            (b) The  Bylaws  of  Sub,  as in  effect  immediately  prior  to the
Effective  Time,  shall  be  the  Bylaws  of  the  Surviving  Corporation  until
thereafter  amended as provided by law, the Certificate of  Incorporation of the
Surviving Corporation and such Bylaws.

            Section 2.05.  Directors  and  OfficersDirectors  and Officers.  The
trustees of Sub  immediately  prior to the  Effective  Time shall be the initial
trustees of the Surviving  Corporation,  each to hold office in accordance  with
the Trust Declaration and Bylaws of the Surviving Corporation,  and the officers
of the Sub immediately prior to the Effective Time shall be the initial officers
of the Surviving Corporation, in each case until their respective successors are
duly elected or appointed and qualified.

            Section  2.06.  Conversion  of Company  SharesConversion  of Company
Shares.  All the shares of common  stock of the Company (the  "Company  Shares")
issued and outstanding immediately prior to the Effective Time (all of which are
and,  immediately prior to the Effective Time will be, owned by the Stockholder)
shall,  by virtue of the Merger and without any action on the part of the holder
thereof, be converted in their entirety into and represent the right to receive,
upon  surrender  to the Parent of the  certificates  formerly  representing  the
Company  Shares,  458,621 shares of 8% Cumulative  Convertible  Preferred  Stock
Series A, without par value (the "8%  Preferred  Stock Series A"), of the Parent
having the terms set forth in the Certificate of Designations attached hereto as
Exhibit C.

            Section 2.07. Conversion of Sub Common StockConversion of Sub Common
Stock.  Each share of common stock, par value $1.00 per share, of Sub issued and
outstanding  immediately  prior to the  Effective  Time shall,  by virtue of the
Merger and without any action on the part of the holder  thereof,  be  converted
into  and   exchangeable  for  one  share  of  common  stock  of  the  Surviving
Corporation.


                  ARTICLE III.  CERTAIN MATTERS PERTAINING TO
                          REAL ESTATE AND THE COMPANY

            Section 3.01.  Delivery of Materials for ReviewDelivery of Materials
for Review. In connection with the transactions  contemplated  hereby,  prior to
the  Closing  Date,  the  Company  delivered  to the  Parent or  otherwise  made
available to the Parent for its review the  documents  and other  materials  set
forth on the Document List attached hereto as Exhibit R-C.

            Section 3.02. As-Is ClauseAs-Is  Clause. As a material inducement to
the Stockholder  and the Company to execute this  Agreement,  the Parent and Sub
acknowledge,  represent and warrant that,  except as expressly  provided in this
Agreement,  (i) the Parent and Sub will have fully  examined and  inspected  the
Property, including, without limitation, the construction, operation and leasing
of the Property,  together with such other  documents and materials with respect
to the  Property  which the  Parent and Sub deem  necessary  or  appropriate  in
connection with their investigation and examination of the Property,  including,
without limitation, all of the documents made available to the Parent or the Sub
at the offices of the Company's  property manager,  (ii) the Parent and Sub will
have accepted the foregoing and the physical condition, value,  presence/absence
of Hazardous Materials,  financing status, use, leasing,  operation, tax status,
income and expenses of the  Property,  (iii) the Property will be subject to all
applicable  laws and "AS IS" and "WHERE IS" and with all  faults  and,  upon the
Closing,  Sub shall  assume  responsibility  for the  physical  condition of the
Property  and (iv) the Parent and Sub will have decided to purchase the Property
solely on the basis of their own independent investigation.  Except as expressly
set forth herein,  neither the Stockholder nor the Company has made,  makes, and
has  authorized  anyone  else to make any  representation  as to the  present or
future  physical  condition,  value,  presence/absence  of hazardous  materials,
financing status,  leasing,  operation,  use, tax status, income and expenses or
any other matter or thing  pertaining  to the  Property,  and the Parent and Sub
acknowledge  that no such  representation  or warranty has been made and that in
entering into this Agreement they do not rely on any  representation or warranty
other than those expressly set forth in this Agreement.  EXCEPT AS EXPRESSLY SET
FORTH IN THIS  AGREEMENT,  NEITHER THE  STOCKHOLDER  NOR THE  COMPANY  MAKES ANY
WARRANTY OR  REPRESENTATION,  EXPRESS OR IMPLIED OR ARISING BY OPERATION OF LAW,
INCLUDING,   WITHOUT  LIMITATION,  ANY  WARRANTY  OF  CONDITION,   HABITABILITY,
MERCHANTABILITY,  OR  FITNESS  FOR A  PARTICULAR  PURPOSE OF THE  PROPERTY.  The
provisions of this Section 3.02 shall survive the Closing.

            Section 3.03.  Closing DeliveriesClosing Deliveries.  (a)  The
Company's Deliveries.  The Company shall deliver or cause to be delivered the
following documents to Sub at the Closing:

            (i) The original,  signed Leases (or copies thereof certified by the
      Stockholder  if  originals  are not  available)  as well as the  Company's
      tenant lease files, and a rent roll and delinquency report for the current
      month  ("Rent  Roll")  certified  by the  Stockholder  as  being  true and
      complete in all material respects, to Stockholders knowledge.

            (ii) A  certification  duly executed by the  Stockholder in the form
      attached hereto as Exhibit R-D, stating that the Company is not a "foreign
      person" within the meaning of Section 1445 of the Internal Revenue Code of
      1986, as amended.

            (iii) Originals (or certified copies thereof if originals are not
      available) of the Contracts.

            (iv) Originals of all books and records in the Company's  possession
      pertaining  to the operation  and  management  of the Property;  provided,
      however,  that the  Stockholder  may keep  copies  of all such  books  and
      records.

            (v) Estoppel  certificates  from  tenants of the Property  occupying
      eighty percent (80%) of the rentable square footage of the Property, dated
      no earlier  than  twenty  (20) days  prior to the  Closing  Date  ("Tenant
      Estoppels")  in the form attached  hereto as Exhibit R-E (provided that if
      any Lease  specifies  the form of  estoppel  certificate  which the tenant
      thereunder is obligated to deliver,  such form may be delivered in lieu of
      the form attached hereto as Exhibit R-E).

            (vi) Evidence reasonably  satisfactory to Sub and Title Company that
      all real  estate  taxes,  sewer  and  water  rates  and  charges,  special
      assessments  and  betterments,  and any utility charges the non-payment of
      which could result in a lien upon the  Property,  either have been paid or
      are included in the Closing Statement for purposes of apportionment.

            (vii) Any and all keys, and lock and safe combinations respecting
      the Improvements.

            (viii) If the  Contracts  listed in Exhibit R-C include any Contract
      for the  construction of tenant  improvements,  evidence of payment by the
      Company of all amounts incurred thereunder through the Closing Date.

            (ix)  Such other instruments as the Parent or the Sub may
      reasonably  request.

            (b)   Satisfaction  of  Deliveries.   Except  with  respect  to  any
representations, warranties or covenants of the parties that survive the Closing
in accordance  with Section 7.01,  the occurrence of the Closing shall be deemed
full and  complete  satisfaction  of the  deliveries  required  pursuant to this
Section 3.03 or the waiver  thereof by the party for whose  benefit the delivery
is required to be made.

            Section  3.04.  Closing  Costs  and   ProrationsClosing   Costs  and
Prorations.  At the Closing,  closing costs shall be paid and prorations made as
between the Sub and the  Stockholder  with respect to the Property in accordance
with this Section 3.04.

            (a)  Closing  Costs.  The  Stockholder  and the Parent each agree to
cooperate  with each other in making all  filings  required  to confirm  that no
state  or  local  real  estate  transfer  tax  is  due in  connection  with  the
consummation of the transactions  contemplated.  In the event any such tax shall
be imposed,  the  Stockholder and the Parent shall each pay one-half of the same
when due, plus any interest and penalties.  No filing or communication  with any
tax official or authority  shall be made by either party  without the consent of
the other party.  Each party shall bear its own costs and expenses in connection
with all such  filings.  The Sub shall pay the title  insurance  premium for the
owner's title insurance policy issued at the Closing to the Sub by Title Company
and any costs for any survey obtained by the Sub.

            (b)   Prorations.  The following prorations shall be made as of
      11:59 p.m. the day prior to the Effective Time:

                  (i) Taxes.  Real and personal  property  taxes and general and
            special  assessments  shall be  prorated  on the basis of the fiscal
            year for such taxes and assessments. If the Closing Date shall occur
            before the real property tax rate for such fiscal year is fixed, the
            apportionment  of  taxes  shall be made on the  basis  of the  taxes
            assessed  for the  preceding  fiscal year.  After the real  property
            taxes are  finally  fixed for the fiscal  year in which the  Closing
            Date  occurs,   the  Parent  and  the   Stockholder   shall  make  a
            recalculation of the  apportionment of such taxes, and the Parent or
            the  Stockholder,  as the case  may be,  shall  make an  appropriate
            payment to the other based on such recalculation.  After the Closing
            Date,  Sub shall  have the right to control  and pursue  exclusively
            without  the  participation  of the  Stockholder  any  and  all  tax
            reduction  proceedings  relating to the  Property;  provided that if
            taxes  increase  as a result of said  proceedings,  the  Stockholder
            shall have no liability  for such  increases,  and provided that Sub
            shall  cooperate with the  Stockholder in pursuing any tax reduction
            proceedings  for tax year  1996.  With  respect to 1996  taxes,  the
            parties  shall  prorate on the basis of the  reduced  assessment  in
            effect on November 4, 1996, and the Stockholder shall be entitled to
            the entire 1996 refund, if any. Subject to the immediately preceding
            sentence, to the extent any real estate tax refund is received on or
            after the Closing  Date by any party  hereto,  the amount of the net
            proceeds of such tax refund  shall be prorated to but not  including
            the  Closing  Date,  if, as and when such  proceeds  are paid by the
            applicable  governmental taxing authority (it being understood that,
            to the extent any tenant leasing space in the Real Property shall be
            entitled to any portion of such tax abatement, such portion shall be
            turned  over to Sub to remit to such  tenant  and shall be  deducted
            from any tax refund proceeds in connection with  calculating the net
            proceeds thereof).

                  (ii) Rents. Prepaid rent, nondelinquent base rents, additional
            rents in the nature of  operating  expense  recoveries,  electricity
            recoveries,  and  tax  reimbursements  under  the  Leases  shall  be
            prorated.  Rents collected after the Closing Date from tenants whose
            rental was  delinquent  on the Closing Date shall be deemed to apply
            first to current rental due at the time of payment and second to the
            rentals  which  were  delinquent  on the  Closing  Date.  Unpaid and
            delinquent  rents,  to which the  Stockholder is entitled,  shall be
            turned over to the  Stockholder  if  collected  by the Sub after the
            Closing  Date  within  30 days of  collection,  less any  reasonable
            third-party  out-of-pocket collection costs actually incurred by the
            Sub. The Sub agrees to use good faith  efforts to attempt to collect
            such  rents.  On the  Closing  Date,  the Sub shall be entitled to a
            credit for any tenant  security  deposits and interest  thereon,  if
            any,  and any other  amounts due tenants  pursuant to such  security
            deposits unless such security deposits have been previously  applied
            by the  Company.  In the  event  that  any  additional  rent  or the
            calculation  thereof is subject to adjustment  pursuant to the terms
            and  provisions  of  any  Lease  (e.g.,   year-end   adjustments  to
            escalation  charges,  tenant audits,  and the like),  then after the
            amount of such additional  rent is finally  determined by the Parent
            (which  determination  shall be reasonably  made), the parties shall
            make the proper  adjustments  so that the proration will be accurate
            based upon the actual amount of such  additional  rent collected for
            the period in question,  and payment  shall be made  promptly to the
            Sub or the  Stockholder,  whichever may be entitled to such payment,
            by the other party for the purpose of making such adjustment.

                  (iii)  Utilities.  Charges and assessments for sewer and water
            and  other   utilities,   including   charges  for   consumption  of
            electricity,  steam and gas shall be  apportioned by the Sub and the
            Stockholder.

                  (iv) Adjustment of Contracts. Except as provided in (v) below,
            payments   required  or  received  under  all  Contracts   shall  be
            apportioned by the Sub and the Stockholder.

                  (v) Leasing Costs.  The Parent shall be entitled to payment at
            Closing  for all costs and  expenses  required  to be paid,  whether
            before or after the Closing, in respect of Leases entered into prior
            to the Closing  for (A) tenant  improvement  construction  contracts
            (except with respect to the payment for certain  tenant  improvement
            work required to be made in 1999 under the Meyer,  Darragh & Buckler
            lease for which the Sub  shall be solely  responsible),  (B)  tenant
            improvement  allowances  to tenants and (C)  brokerage  commissions,
            except  commissions  which may  become  due in  connection  with the
            extension or renewal of any Lease on or after the Closing Date or in
            connection with the exercise after the Closing Date by any tenant of
            any expansion or extension option contained in any of the Leases.

                  (vi)  Other.  Any other items of income and expense shall
            be prorated between the Sub and the Stockholder.

            (c) Payment of  Apportionment.  Any net credit payable by the Sub to
      the  Stockholder  (as a dividend in its capacity as former  shareholder of
      the  Company  pursuant  to  resolution  of the Board of  Directors  of the
      Company,  dated  November 4, 1996) or by the  Stockholder  to the Sub as a
      result of the foregoing  prorations shall be paid within five (5) business
      days after the  Closing  Date by wire  transfer of  immediately  available
      funds.

            (d) Post-Closing Cooperation.  After the Closing, the Parent and the
      Stockholder  shall  cooperate  with  each  other,  and shall  cause  their
      respective  property  managers  for the  Property to  cooperate  with each
      other, including,  without limitation,  making available books and records
      for the Property,  in order to respond to any tenant  inquiry  concerning,
      challenge to or audit of, any operating expense or similar additional rent
      or rent  escalation  item. To the extent that any  adjustment or proration
      required hereunder was based on estimates at the time of the Closing,  the
      parties  shall  readjust and  re-prorate  based upon final  numbers,  when
      available,  and make payment as appropriate  based upon such  readjustment
      and re-proration.

            (e) A closing  statement  (the "Closing  Statement")  reflecting the
      adjustments made at the Closing and described in Section 3.04 hereof shall
      be  executed  and  delivered  by  Stockholder  and Parent  within five (5)
      Business Days after the Effective Time.

            (f) Survival.  The provisions of this Section 3.04 shall survive the
      Closing,  provided,  however, that the Stockholder and the Parent agree to
      use  reasonable  efforts to finalize all prorations on or before the first
      anniversary of the Closing Date.

            Section 3.05.  Stockholder's Representations and
WarrantiesStockholder's Representations and Warranties.  (a)  The Stockholder
hereby makes the following representations and warranties to the Parent and
Sub as of the Closing Date:

            (i) Delivery of Written  Materials.  Exhibit R-C includes all of the
      Leases  and  Contracts  relating  to the  Property,  and the  Company  has
      delivered to Sub true,  accurate and complete  copies of all of the Leases
      and the Contracts and all other documents and reports  included in Exhibit
      R-C. Sub hereby  acknowledges  receipt of each of the Leases and Contracts
      listed in Exhibit R-C, but said  acknowledgement  shall in no way diminish
      the foregoing representation and warranty of the Stockholder.

            (ii) Other  Agreements.  On the Closing  Date,  (A) there will be no
      Contracts  other than the  Contracts  listed in Exhibit R-C, and (B) there
      will be no Leases other than the Leases listed in Exhibit R-C.

            (iii) No Conflict.  The execution,  delivery of and  consummation of
      the transactions contemplated by this Agreement are not prohibited by, and
      will not conflict with,  constitute  grounds for termination of, or result
      in  the  breach  of  organizational   documents  of  the  Company  or  the
      Stockholder,  any of the Leases or the Contracts or any other agreement or
      instrument  to which  the  Company  is now a party or  otherwise  subject,
      except  for  such  conflicts  or  breaches  of  such  Contracts  or  other
      agreements  or  instruments  as would not  constitute  a Material  Adverse
      Effect either individually or in the aggregate.

            (iv) Leases.  (A) No rent has been paid by any tenant or occupant of
      the Property more than thirty (30) days in advance  (except as adjusted in
      the Closing Statement),  (B) to the Stockholder's  knowledge,  neither any
      tenant nor the Company is in default in the  performance  of any  material
      covenant,  agreement  or  condition  contained  in any of the Leases,  (C)
      neither the Stockholder  nor the Company has received  written notice from
      any tenant regarding  pending or threatened  material offsets against rent
      or for any material  monetary or material claim against the Company and no
      future rent  concessions  have been created which are not disclosed in the
      Leases, the Rent Roll, Tenant Estoppels or the Exhibits hereto, (D) to the
      Stockholder's  knowledge,  any and all construction and improvements  that
      were  required to be  performed  by the Company  under any Lease have been
      fully  completed and accepted by each tenant,  except under the Leases and
      the Contracts  designated with an asterisk in Exhibit R-C, and all leasing
      commissions  payable on account of any of the Leases have been fully paid,
      except  those which may become due in  connection  with the  extension  or
      renewal of any Lease or in  connection  with the exercise by any tenant of
      any expansion or extension option  contained in any of the Leases,  (E) to
      the Stockholder's  knowledge,  the Leases are in full force and effect and
      (F)  attached  hereto as Exhibit  R-H is a true and  complete  list of all
      security deposits posted under the Leases together with interest,  if any,
      accrued  thereon to the Closing Date. The  representations  and warranties
      made in this Subsection  3.05(a)(iv)  shall be deemed withdrawn as to each
      Lease for which Sub receives a Tenant Estoppel on or before the Closing.

            (v)   Notices.  To the Stockholder's knowledge, neither the
      Stockholder nor the Company has received written notice or citation:

                  (1) from any federal,  state,  county or  municipal  authority
            alleging   any   fire,   health,    safety,    building   pollution,
            environmental,  zoning or other  violation  of any law,  regulation,
            permit,  order or  directive  in respect of the Property or any part
            thereof, which has not been entirely corrected;

                  (2) from any  insurance  company  or  bonding  company  of any
            defects or inadequacies  in the Property or any part thereof,  which
            would materially adversely affect the insurability of the same or of
            any termination or threatened termination of any policy of insurance
            or bond; or

                  (3) from any governmental authority with respect to a proposed
            eminent domain taking of all or any portion of the Property.

            (vi)  Violation  of  Law.  To  the  Stockholder's   knowledge,   all
      governmental  approvals  required for the current use of the Property have
      been  issued  and  are   currently  in  effect   without   violation,   to
      Stockholder's  knowledge,  the  Property  is not under  investigation  for
      failure to comply with any statutes, laws, ordinances, rules, regulations,
      orders or directives of any and all  governmental  agencies  pertaining to
      the use or occupancy of the Property, and, to the Stockholder's knowledge,
      the Property is in compliance  with,  and not in violation in any material
      respect of, any applicable statutes, laws, ordinances, rules, regulations,
      orders or directives;  provided,  however,  that the Stockholder  makes no
      representation  herein with respect to compliance  with the Americans with
      Disabilities  Act or any rule,  regulation or  interpretation  promulgated
      thereunder.

            (vii) Hazardous Materials. To the Stockholder's knowledge, except as
      disclosed  in (A) the  Environmental  Assessment  Report  dated July 1989,
      prepared  by  Schneider  Engineers  for the  Frick  Building,  and (B) the
      Environmental  Assessment  Report dated November 5, 1996,  prepared by IVI
      Environmental,  Inc.  for  the  Frick  Building,  there  are no  Hazardous
      Materials  at the  Property  except for  ordinary  cleaning,  landscaping,
      maintenance,  and office supplies  consistent with the use of the Property
      as an  office  building  which  are used and  stored  in  compliance  with
      applicable Environmental Laws, and to the Stockholder's knowledge, neither
      the  Company  nor any tenant of the Real  Property  during  the  Company's
      ownership thereof has previously used, manufactured,  generated,  treated,
      stored,  disposed of, or released any Hazardous  Materials on or under the
      Property or  transported  any  Hazardous  Materials  over the  Property in
      violation of any applicable  Environmental  Laws. As used herein,  (a) the
      term  "Environmental  Laws"  shall  include,  but not be  limited  to, the
      Comprehensive  Environmental  Response,  Compensation and Liability Act of
      1980, as amended, 42 U.S.C. ss.ss. 9601 et seq., the Resource Conservation
      and Recovery Act, 42 U.S.C.  ss.ss. 6901 et seq., the Hazardous  Materials
      Transportation  Act, 49 U.S.C.  ss.ss.  1801 et seq.,  the  Federal  Water
      Pollution  Control Act, 33 U.S.C.  ss.ss. 1251 et seq., the Clean Air Act,
      42 U.S.C. ss.ss. 7401 et seq., the Toxic Substances Control Act, 15 U.S.C.
      ss.  2601,  the Refuse Act, 33 U.S.C.  ss.ss.  407 et seq.,  and any other
      applicable similar state, federal,  county,  regional,  municipal or local
      law,  statute,  ordinance,  rule or  regulation  governing  the control of
      substances  dangerous to public  health or safety,  as same may be amended
      from time to time; and (b) the term  "Hazardous  Materials"  shall include
      but  not be  limited  to  asbestos-containing  materials,  polychlorinated
      biphenyls,   flammable  materials,   explosives,   radioactive  materials,
      petroleum  products and those  materials or  substances  now or heretofore
      defined  as  "hazardous  substances,"  "hazardous  materials,"  "hazardous
      waste,"  "toxic  substances,"  or other  similar  designations  under  the
      Environmental Laws.

            (viii)  Legal  Proceedings.  Except  as set  forth  in  Exhibit  R-G
      attached hereto, there are no actions, suits or proceedings,  pending, or,
      to the Stockholder's  knowledge,  threatened before any court, commission,
      agency or other administrative authority against, or affecting the Company
      or the Property. The Company has not suffered or confessed any judgment in
      or before  any such  court,  commission,  agency  or other  administrative
      authority against which remains unsatisfied.

            (ix)  No Employees.  The Company has never employed any person as
      an employee.

            (x) Leasing Commissions.  Except as set forth on Exhibit R-F hereto,
      no person is entitled to any leasing  commission  in  connection  with the
      extension  or renewal of any Lease or in  connection  with the exercise by
      any tenant of any  expansion or extension  option  contained in any of the
      Leases. Neither the Company nor the Property is subject to any "protection
      list" or similar  obligation  with  respect  to the future  leasing of the
      Property except as set forth on Exhibit R-F hereto.

            (xi)  Assets  and  Liabilities.  Other  than  the  Property  and the
      Account, the Company has no assets. Other than the Contracts,  the Company
      Note,  the Leases and the matters  disclosed in Exhibits R-E, R-F, R-G and
      R-H, the Company has no liabilities, whether current, contingent or other.

            (xii)  The  Account.  (A) There is  $40,000,000  on  deposit  in the
      Account,  (B) the Account is not subject to any pledge,  claim,  offset or
      defense and (C) the Company has good and clear title to the Account.

            (xiii) No Liens;  Acknowledgement.  The  Company  owns all  Personal
      Property  free and clear of all Liens  except as set forth in Exhibit R-H.
      The Company  makes no  representation  or warranty as to the  ownership of
      either the bust of Henry Clay Frick or the bronze lion sculptures  located
      in the lobby of the Improvements.

            (b) The Stockholder's Knowledge. Any and all uses of the phrases "to
Stockholder's  knowledge" or other references to the Stockholder's  knowledge in
this Agreement shall mean the actual,  present,  conscious knowledge of James W.
Smith,  III and Lisa Saylor (the  "Stockholder  Knowledge  Individuals") as to a
fact at the time given. The Parent and Sub acknowledge that, for purposes of the
representations  and warranties set forth in this  Agreement,  such  individuals
have not performed and are not obligated to perform any  investigation or review
of any files in the possession of the Stockholder or the Company with respect to
the subject  matter  addressed  in the  representations  and  warranties  of the
Stockholder  set  forth  in  this  Agreement.  The  actual,  present,  conscious
knowledge  of any  other  individual  or  entity  shall  not be  imputed  to the
Stockholder Knowledge Individuals.

            Section  3.06.   Brokerage   CommissionBrokerage   Commission.   The
Stockholder and the Parent each warrant to the other party that its sole contact
with the  other  party  or the  Property  regarding  this  transaction  has been
directly  with the  other  party or with  Lazard  Freres & Co.,  LLC,  Cushman &
Wakefield,  Inc.  or  Galbreath-Middle  Atlantic.  The  Parent  shall be  solely
responsible for any investment fees or commissions,  payable to Lazard Freres in
connection with the transactions contemplated by this Agreement. The Stockholder
shall be solely  responsible  for any investment  fees or commission  payable to
Cushman & Wakefield,  Inc. and Galbreath-Middle  Atlantic in connection with the
transactions  contemplated  by this  Agreement.  The Parent and the  Stockholder
further  warrant to each other that no other broker or finder can properly claim
a right to a commission or finder's fee based upon contacts between the claimant
and the  warranting  party with respect to the other party or the Property.  The
Parent and the  Stockholder  shall  indemnify,  defend and hold the other  party
harmless from and against any loss, cost or expense,  including, but not limited
to,  attorneys'  fees and  court  costs,  resulting  from any claim for a fee or
commission  by any broker or finder in  connection  with the  Property  and this
Agreement  resulting  from  the  indemnifying  party's  actions.  The  foregoing
indemnities shall survive the Closing.

            Section 3.07. Company  DividendCompany  Dividend. The parties hereto
acknowledge  that the Board of  Directors  of the  Company on  November  4, 1996
declared a dividend  payable to shareholder of record of the Company on November
5, 1996.

            Section  3.08.  Transfer of Company  NoteTransfer  of Company  Note.
Immediately  after the Effective Time, the Stockholder shall assign and transfer
the Company Note to the Parent or its designee.


                            ARTICLE IV.  CONDITIONS

            Section 4.01.  Conditions to the MergerConditions to the Merger. The
respective   obligations   of  all  parties  to  consummate   the   transactions
contemplated by this Agreement shall be subject to the fulfillment,  at or prior
to the Effective Time, of the following conditions:

            (a)  Stockholder  Approval.  This  Agreement  and  the  transactions
      contemplated  hereby shall have been approved and adopted by the requisite
      affirmative  vote of the stockholder of the Company to the extent required
      by Delaware Law and the Certificate of Incorporation of the Company.

            (b) No Order. No statute, rule, regulation,  order, executive order,
      decree or injunction  shall have been  enacted,  entered,  promulgated  or
      enforced by any court or governmental authority which is in effect and has
      the effect of prohibiting the  consummation of the Merger (it being agreed
      that each of the parties hereto shall use their respective best efforts to
      have any such injunction lifted).

            Section    4.02.    Conditions   to   the    Obligations    of   the
StockholderConditions to the Obligations of the Stockholder.  The obligations of
the  Stockholder  under this Agreement  shall be subject to the  satisfaction or
waiver of the following conditions on or before the Closing Date:

            (a)  Opinions  of  Parent's  Counsel.  The  Stockholder  shall  have
      received from Shearman & Sterling, counsel for the Parent and the Sub, and
      from Lionel, Sawyer & Collins,  Nevada counsel for the Parent and the Sub,
      opinions dated the Closing Date in form and substance  satisfactory to the
      Stockholder.

            (b)  Representations  and  Warranties  Complete  and  Correct.   The
      representations  and  warranties  of the Parent  contained in Section 5.01
      hereof shall have been complete and correct in all material respects as of
      the Closing Date.

            (c) Compliance with this Agreement.  The Parent shall have performed
      and complied in all material  respects with all agreements,  covenants and
      conditions contained herein which are required to be performed or complied
      with by it on or before the Closing Date.

            (d) Officers'  Certificate.  The  Stockholder  shall have received a
      certificate,  dated the Closing  Date and signed by the  President  or any
      Vice  President  and attested by the  Secretary of the Parent,  certifying
      that the  conditions  set  forth  in  Sections  4.02(b)  and  4.02(c)  are
      satisfied on and as of such date.

            (e) Consents;  Permits. The Parent shall have received all consents,
      permits, approvals and other authorizations that may be required from, and
      made all such  filings and  declarations  that may be required  with,  any
      person pursuant to any law, statute,  regulation or rule (federal,  state,
      local and foreign), or pursuant to any agreement, order or decree by which
      the  Parent  or any  of its  assets  is  bound,  in  connection  with  the
      transactions  contemplated  by  this  Agreement,  except  for  (a)  notice
      requirements which may be fulfilled subsequent to the Closing Date and (b)
      consents, permits, approvals, authorizations, filings and declarations the
      failure to obtain or to  undertake  (i) could not have a Material  Adverse
      Effect on the Parent or (ii) could not adversely affect the ability of the
      Parent to  perform  its  obligations  under the  Basic  Agreements  or any
      agreement executed in accordance therewith.

            (f)   Stockholders' Agreement.  The Parent shall have executed
      and delivered the Stockholders' Agreement.

            (g)   Rent Rolls.   Rent rolls of the Parent, certified as of a
      recent date by the Treasurer of the Parent as being true and complete
      in all material respects to his knowledge.

            (h)    Supporting Documents.   The Stockholder and its counsel
      shall have received copies of the following documents:

                  (i) (A) the  Charter,  certified  as of a  recent  date by the
            appropriate authority of the Parent's jurisdiction of incorporation,
            and (B) a certificate of such authority dated as of a recent date as
            to the due  incorporation  and  good  standing  of the  Parent,  the
            payment of all  franchise and excise taxes by the Parent and listing
            all documents of the Parent on file with said authority;

                  (ii) a certificate of the Secretary or an Assistant  Secretary
            of the  Parent  dated  the  Closing  Date and  certifying:  (A) that
            attached  thereto is a true and  complete  copy of the Bylaws of the
            Parent  as in  effect  on the date of such  certification;  (B) that
            attached  thereto  is a true and  complete  copy of all  resolutions
            adopted  by the Board of  Directors  or a  committee  thereof or the
            stockholders of the Parent  authorizing the execution,  delivery and
            performance of the Basic Agreements, the issuance, sale and delivery
            of the Preferred Shares and the  reservation,  issuance and delivery
            of the Conversion  Shares, and that all such resolutions are in full
            force and effect and are all the  resolutions  adopted in connection
            with the transactions contemplated by the Basic Agreements; (C) that
            the  Charter  has not  been  amended  since  the  date  of the  last
            amendment or restatement  referred to in the  certificate  delivered
            pursuant to clause (i)(B)  above;  (D) that the Bylaws have not been
            amended  since  the date of the last  amendment  referred  to in the
            certificate  delivered pursuant to clause (ii)(A) above; and (E) the
            incumbency  and  specimen  signature  of each  officer of the Parent
            executing any Basic Agreement,  the stock certificates  representing
            the Preferred  Shares and any  agreement,  certificate or instrument
            furnished pursuant hereto, and a certification by another officer of
            the Parent as to the incumbency and signature of the officer signing
            the certificate referred to in this clause (ii)(E); and

                  (iii)  such   additional   supporting   documents   and  other
            information with respect to the operations and affairs of the Parent
            as the Stockholder may reasonably request.

            Section 4.03.  Conditions to the Obligations of the ParentConditions
to the  Obligations  of the Parent.  The  obligations  of the Parent  under this
Agreement  shall be  subject  to the  satisfaction  or waiver  of the  following
conditions on or before the Closing Date:

            (a) Opinion of Stockholder's Counsel. The Parent shall have received
      from  counsel to the  Company and the  Stockholder,  an opinion of counsel
      dated the Closing Date in form and substance satisfactory to the Parent.

            (b)  Compliance  with this  Agreement.  Each of the  Company and the
      Stockholder  shall have  performed  and complied in all material  respects
      with all agreements,  covenants and conditions  contained herein which are
      required to be performed or complied on or before the Closing Date.

            (c)  Company's  and  Stockholder's  Representations  and  Warranties
      Complete and Correct.  The  representations  and warranties of the Company
      and the Stockholder  contained in Sections 3.05 and 5.02 of this Agreement
      shall be complete  and correct when made and shall be complete and correct
      at and as of the Closing  Date,  after  giving  effect to the  transaction
      contemplated by this Agreement, as if made on and as of such date.

            (d)   Other Documentation.  The Parent shall have received such
      additional supporting documents and other information as the Parent may
      reasonably request.



                  ARTICLE V.  REPRESENTATIONS AND WARRANTIES

            Section 5.01.  Representations  and Warranties of the Parent and the
SubRepresentations  and Warranties of the Parent and the Sub. Each of the Parent
and Sub,  jointly and severally,  represents and warrants to the Company and the
Stockholder as follows:

            (a)  Organization,  Good  Standing  and  Qualification.  Each of the
      Parent and its  Subsidiaries  is a  corporation  duly  organized,  validly
      existing  and in good  standing  under  the  laws of its  jurisdiction  of
      incorporation or organization, and the Parent and its Subsidiaries has all
      requisite  corporate  power and authority  under such laws to own or lease
      and operate its  properties and to carry on its business as now conducted.
      The  Parent and its  Subsidiaries  is duly  qualified  or  licensed  to do
      business as a foreign corporation in good standing in each jurisdiction in
      which the nature of the business  transacted by it or the character of the
      properties owned or leased by it requires it to so qualify or be licensed,
      except  where the  failure  to so  qualify  or be  licensed  or be in good
      standing would not have a Material Adverse Effect.  Each of the Parent and
      Sub has the corporate power and authority to execute,  deliver and perform
      the  Basic  Agreements  to  which it is a party,  and the  Parent  has the
      corporate power and authority to issue,  sell and deliver the 8% Preferred
      Stock  Series A and,  upon  conversion  thereof,  to issue and deliver the
      Conversion Shares.

            (b) Authorization,  Enforceability. All corporate action on the part
      of the  Parent  and Sub,  and their  respective  officers,  directors  and
      stockholders  necessary for the  authorization,  execution and delivery of
      the Basic Agreements, the performance of all obligations of the Parent and
      Sub thereunder and the authorization,  issuance,  sale and delivery of the
      8% Preferred  Stock Series A and the  Conversion  Shares has been taken or
      will be taken prior to the Closing.  Each of the Basic Agreements has been
      duly  authorized,  executed  and  delivered  by the  Parent  and  Sub  and
      constitutes   valid  and  legally  binding   obligations  of  the  Parent,
      enforceable  in  accordance  with  their  respective   terms,   except  as
      enforceability  may  be  limited  by  applicable  bankruptcy,  insolvency,
      reorganization,  moratorium or similar laws  affecting the  enforcement of
      creditors'  rights generally and by general  principles of equity (whether
      enforcement is sought by proceedings in equity or at law).

            (c) No Conflict. The execution and delivery by the Parent and Sub of
      the Basic  Agreements to which they are a party,  the  performance  by the
      Parent and Sub of their respective obligations  thereunder,  the issuance,
      sale and delivery of the 8% Preferred  Stock Series A and, upon conversion
      thereof,  the  issuance and delivery of the  Conversion  Shares,  will not
      violate any  provision of law, the Charter or Bylaws of the Parent or Sub,
      or,  any order of any court or other  agency of  government,  or  conflict
      with, result in a breach of or constitute (with notice or lapse of time or
      both) a default  under any  indenture,  agreement or other  instrument  by
      which the Parent or Sub or any of their respective properties or assets is
      bound,  or result  in the  creation  or  imposition  of any lien,  charge,
      restriction, claim or lien of any nature whatsoever known to the Parent or
      Sub upon any of the properties or assets of the Parent or Sub.

            (d) Outstanding Options,  Etc. As of the Closing Date, there are not
      outstanding  any  options,   warrants,  rights  (including  conversion  or
      preemptive rights) or agreements,  orally or in writing,  for the purchase
      or  acquisition  from the Parent of any shares of its capital stock except
      for (i) the conversion  privileges of the 7% Preferred  Stock,  and the 8%
      Preferred Stock Series A and (ii) options to purchase up to 952,500 shares
      of Common  Stock that have been issued to directors  and  employees of the
      Parent.

            (e) Valid Issuance of Securities.  (i) The 8% Preferred Stock Series
      A to be issued pursuant to this Agreement will be duly and validly issued,
      fully paid and nonassessable. The Common Stock issuable upon conversion of
      8%  Preferred  Stock  Series A has  been  duly and  validly  reserved  for
      issuance,  and upon issuance in accordance with the Charter, shall be duly
      and validly issued, fully paid and non-assessable.

            (ii)  Neither the  issuance,  sale or  delivery of the 8%  Preferred
      Stock Series A nor, upon the conversion thereof,  the issuance or delivery
      of  the  Conversion   Shares  is  subject  to  any  preemptive   right  of
      stockholders  of the Parent  arising under law or the Charter or Bylaws of
      the Parent,  to any  contractual  right of first refusal or other right in
      favor of any person.

            (f)   Litigation.   There  is  no  action,   suit,   proceeding   or
      investigation  pending or currently  threatened  against the Parent or Sub
      that  questions  the validity of the Basic  Agreements or the right of the
      Parent  or Sub to enter  into  them,  or to  consummate  the  transactions
      contemplated  thereby,  or  that  might,  either  individually  or in  the
      aggregate,  have a Material Adverse Effect on the Parent, or result in any
      change in the current  equity  ownership of the Parent,  nor is the Parent
      aware that there is any basis for the foregoing. The Parent is not a party
      or subject to the provisions of any order, writ,  injunction,  judgment or
      decree of any court or government agency or  instrumentality.  There is no
      action, suit,  proceeding or investigation by the Parent currently pending
      or which the Parent intends to initiate.

            (g)   Governmental   Consents.   Assuming   the   accuracy   of  the
      representations  and  warranties  of the  Stockholder  and the Company set
      forth in this Agreement, no consent,  approval, order or authorization of,
      or registration,  qualification,  designation, declaration or filing with,
      any governmental authority on the part of the Parent or Sub is required in
      connection with the consummation of the transactions  contemplated by this
      Agreement.

            (h) Compliance with Law and Other Instruments.  The Parent is not in
      conflict  with,  or in  default  or  violation  of,  (i)  any  law,  rule,
      regulation,  order, judgment or decree applicable to it or by which any of
      its  property  or assets  is bound or  affected,  or (ii) any note,  bond,
      mortgage,   indenture,   contract,   agreement,  lease,  license,  permit,
      franchise or other  instrument  or obligation to which it is a party or by
      which  the  Parent  or any  property  or asset of the  Parent  is bound or
      affected, except for any such conflicts, defaults or violations that would
      not, individually or in the aggregate, have a Material Adverse Effect.

            (i) Disclosure.  The Parent has fully provided the Stockholder  with
      all the  information  which the  Stockholder  has  requested  for deciding
      whether to undertake the  transactions  contemplated by this Agreement and
      all  information  which the Parent  believes is  reasonably  necessary  to
      enable the  Stockholder  to make such  decision,  including  the  Parent's
      Executive  Summary  Book and  Property  Information  Book,  as  amended or
      supplemented  from time to time prior to date  hereof  (collectively,  the
      "Executive  Summary").  Neither the Executive Summary,  this Agreement nor
      any  other  statement  or  certificate  made or  delivered  in  connection
      herewith  contains  any untrue  statement  of a material  fact or omits to
      state a material fact necessary to make the  statements  herein or therein
      not misleading,  except that, with respect to projections contained in the
      Executive  Summary,  the Parent represents only that such projections were
      prepared in good faith and that the Parent  believes there is a reasonable
      basis for such projections.

            (j) Securities  Reports.  All forms,  reports,  statements and other
      documents  filed by the Parent with the  Commission  were  prepared in all
      material  respects in accordance  with the  requirements of applicable law
      and did not at the time they were filed contain any untrue  statement of a
      material  fact or omit to state a  material  fact  required  to be  stated
      therein or necessary in order to make the statements  therein, in light of
      the circumstances under which they were made, not misleading.

            (k)  Taxes.  The  Parent  elected  to be  taxable  as a real  estate
      investment  trust for federal  income tax purposes  beginning in 1982, its
      first year of  existence.  The Parent  has filed all  material  income and
      franchise tax returns  required by  applicable  law to be filed by it, and
      has  timely  paid  all  Taxes  shown  due on  such  returns.  There  is no
      agreement,  waiver or  consent  providing  for an  extension  of time with
      respect to the assessment of any tax or tax deficiency against the Parent.
      There is no action, suit,  proceeding,  investigation,  audit or claim now
      pending  against,  or with respect to, the Parent in respect of any Taxes.
      The Parent has not filed any agreement or consent under Section  341(f) of
      the Internal Revenue Code of 1986, as amended.

            (l) No Material  Adverse Change.  Subsequent to the respective dates
      as of which  information  is given in the Parent's Form 10K for its fiscal
      year ended  December  31,  1995,  its Form 10Qs for the first three fiscal
      quarters  of fiscal  1996 and its proxy  statement  for its June 20,  1996
      meeting  of  stockholders  (the  "Commission  Filings")  and  prior to the
      Effective  Time,  except as set forth in or contemplated by the Commission
      Filings and this  Agreement,  (i) there has not been any material  adverse
      change or any development involving a prospective material adverse change,
      in the business,  properties,  business prospects, condition (financial or
      otherwise)  or results  of  operations  of the  Parent or any  Subsidiary,
      arising  for any  reason  whatsoever,  (ii)  neither  the  Parent  nor any
      Subsidiary  has  incurred  or  will  incur  any  material  liabilities  or
      obligations,  direct or  contingent,  nor has the Parent or any Subsidiary
      entered into nor will it enter into any material  transactions  other than
      pursuant to this Agreement and the transactions referred to herein and the
      acquisition of One Lincoln Terrace,  Oak Book,  Illinois and (iii) neither
      the  Parent  nor any  Subsidiary  has or will  have  purchased  any of its
      outstanding capital stock.

            (m) Title to Properties.  To the Parent's knowledge,  the Parent and
      the  Subsidiaries  have good and  marketable  title to all  properties and
      assets  described in the  Commission  Filings or the Executive  Summary as
      owned by them, free and clear of all liens,  security interests,  pledges,
      charges, encumbrances,  mortgages, defects or restrictions, except such as
      are described in the Commission  Filings or the Executive  Summary or such
      as do not have a Material Adverse Effect. To the Parent's  knowledge,  the
      Parent  and each  Subsidiary  owns or leases  all such  properties  as are
      necessary  to  its  operations  as  now  conducted  or as  proposed  to be
      conducted,  except  where the  failure to so own or lease would not have a
      Material Adverse Effect.

            (n)  Compliance  with  Laws.  To the  Parent's  knowledge,  (a)  the
      operations  of the Parent  and each  Subsidiary  with  respect to any real
      property currently leased or owned or by any means controlled by it are in
      compliance in all material  respects with all applicable  federal,  state,
      and  local  laws,   ordinances,   rules,   and  regulations   relating  to
      occupational  health and safety  and the  environment,  and the Parent and
      each Subsidiary has all licenses,  permits and authorizations necessary to
      operate under all such laws, ordinances,  rules and regulations and are in
      compliance  with all terms and  conditions of such  licenses,  permits and
      authorizations  except  where  the  failure  to  comply  would  not have a
      Material  Adverse  Effect;  (b) neither the Parent nor any  Subsidiary has
      authorized   or   conducted   or  has   knowledge   of   the   generation,
      transportation,  storage,  use,  treatment,  disposal  or  release  of any
      hazardous  substance,   hazardous  waste,  hazardous  material,  hazardous
      constituent, toxic substance, pollutant,  contaminant,  petroleum product,
      natural gas, liquefied gas or synthetic gas defined or regulated under any
      environmental  law on, in or under any real  property of the Parent or any
      Subsidiary  in any amount  which has a Material  Adverse  Effect;  and (c)
      there  is no  pending  or,  to  the  best  knowledge  of the  Parent,  any
      threatened claim, litigation or any administrative agency proceeding,  nor
      has the Parent or any Subsidiary  received any written or oral notice from
      any  governmental  entity or third party,  that (i) alleges a violation of
      any  laws,  ordinances,  rules  and  regulations  by the  Parent  or  such
      Subsidiary;  (ii) alleges the Parent or such  Subsidiary is a liable party
      under the Comprehensive Environmental Response Compensation, and Liability
      Act, 42 U.S.C.  ss. 9601 et seq, or any state superfund law; (iii) alleges
      possible   contamination   of  the  environment  by  the  Parent  or  such
      Subsidiary; or (iv) alleges possible contamination of real property of the
      Parent or any  Subsidiary  or any case  which is likely to have a Material
      Adverse Effect.

            (o) Losses.  Since  December  31,  1995,  neither the Parent nor any
      Subsidiary  has  sustained  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 disclosed in or contemplated by
      the  Commission  Filings or the  Executive  Summary,  which has a Material
      Adverse Effect.

            (p)   Seattle Obligation.  The Cumulative Preference Deficit (as
      defined in and pursuant to the Partnership Agreement of Third
      University Limited Partnership, dated as of October 3, 1986 and as
      amended to the date of this Agreement) payable to Arico Seattle Inc. is
      $8,107,590.86.

            Section 5.02.  Representations and Warranties of the Stockholder and
the  CompanyRepresentations  and Warranties of the  Stockholder and the Company.
The Stockholder and the Company, jointly and severally, represent and warrant to
the Parent and Sub as follows:

            (a)  Incorporation and Authority of the Company and the Stockholder.
      Each  of  the  Company  and  the   Stockholder   is  a  corporation   duly
      incorporated,  validly existing and in good standing under the laws of its
      jurisdiction  of  incorporation  or  organization  and has  all  necessary
      corporate power and authority to enter into the Basic  Agreements to which
      it is a party, to carry out its  obligations  thereunder and to consummate
      the transactions  contemplated thereby. The execution and delivery by each
      of the Company and the Stockholder of the Basic  Agreements to which it is
      party,  and the consummation by each of the Company and the Stockholder of
      the transactions  contemplated  thereby,  have been duly authorized by all
      necessary  corporate action on the part of the Company and the Stockholder
      and no  other  corporate  proceedings  on the part of the  Company  or the
      Stockholder  are  necessary  to  authorize  the  Basic  Agreements  or  to
      consummate the transactions  contemplated thereby. Each of the Company and
      the  Stockholder  has  duly  executed  and  delivered  each  of the  Basic
      Agreements  to  which  it is a  party  and,  assuming  due  authorization,
      execution  and delivery by the other  parties  thereto,  each of the Basic
      Agreements  constitutes the legal, valid and binding obligation of each of
      the Company and the  Stockholder  enforceable  against the Company and the
      Stockholder in accordance with their respective terms. The restrictions on
      business  combinations  contained in Section 203 of Delaware Law have been
      satisfied with respect to the Merger.

            (b)   Organization   and   Qualification  of  the  Company  and  the
      Stockholder. (i) Each of the Company and the Stockholder has the requisite
      power and authority and all necessary governmental approvals to own, lease
      and operate its properties and to carry on its business as it is now being
      conducted,  except  where the failure to be so  organized,  existing or in
      good standing or to have such power,  authority and governmental approvals
      would not,  individually  or in the  aggregate,  have a  Material  Adverse
      Effect. The Company is duly qualified or licensed as a foreign corporation
      to do business,  and is in good standing,  in each jurisdiction  where the
      character of the properties owned,  leased or operated by it or the nature
      of its business makes such  qualification or licensing  necessary,  except
      for such failures to be so qualified or licensed and in good standing that
      would not,  individually  or in the  aggregate,  have a  Material  Adverse
      Effect.  The Company  does not  directly or  indirectly  own any equity or
      similar  interest in, or any interest  convertible into or exchangeable or
      exercisable  for,  any equity or  similar  interest  in, any  corporation,
      partnership, joint venture or other business association or entity.

            (ii)  True,  complete  and  correct  copies  of the  Certificate  of
      Incorporation  and  Bylaws of the  Company,  each as in effect on the date
      hereof, have been delivered by the Company to the Parent.

            (c) Capital Stock of the Company.  The  authorized  capital stock of
      the Company  consists of 1,000  shares of common  stock  ("Company  Common
      Stock").  As of the date  hereof,  100 shares of Company  Common Stock are
      issued and  outstanding,  all of which are validly issued,  fully paid and
      nonassessable. None of the issued and outstanding shares of Company Common
      Stock was  issued in  violation  of any  preemptive  rights.  There are no
      options,  warrants,  convertible  securities or other rights,  agreements,
      arrangements or commitments of any character relating to the capital stock
      of the  Company or  obligating  the Company to issue or sell any shares of
      capital  stock of, or any other  interest  in, the  Company.  There are no
      outstanding contractual  obligations of the Company to repurchase,  redeem
      or  otherwise  acquire  any shares of Company  Common  Stock or to provide
      funds  to,  or  make  any  investment  (in the  form  of a  loan,  capital
      contribution or otherwise) in, any other Person.

            (d)  Corporate  Books and  Records.  The minute books of the Company
      contain and properly reflect all proceedings of the  stockholders,  Boards
      of Directors and all committees of the Boards of Directors of the Company.
      Complete  and  accurate  copies of all such minute  books and of the stock
      register  of the  Company  have been  provided  or made  available  by the
      Company to the Parent. The foregoing notwithstanding, copies of the minute
      books of the Company made  available by the Company to the Parent prior to
      the Effective Time do not contain  records of proceedings  relating to the
      consideration  of the  transactions  contemplated by this Agreement or the
      alternatives  thereto considered by the Boards of Directors (or committees
      thereof) of the Company in the discharge of their fiduciary duties.

            (e) Taxes.  The Company is a qualified  REIT  subsidiary  within the
      meaning of Section  856(i) of the Code. The Company has filed all material
      income and franchise tax returns required by applicable law to be filed by
      it, and has timely paid all Taxes shown due on such  returns.  There is no
      agreement,  waiver or  consent  providing  for an  extension  of time with
      respect  to the  assessment  of any Taxes or tax  deficiency  against  the
      Company.  There is no action, suit,  proceeding,  investigation,  audit or
      claim now pending  against,  or with  respect to the Company in respect of
      any Taxes.  The  Company  has not filed any  agreement  or  consent  under
      Section  341(f) of the  Internal  Revenue  Code of 1986,  as amended.  The
      Company  has no  built-in  gain  within the  meaning of  Internal  Revenue
      Service  Notice  88-19.  There  are no tax  liens  on  any  assets  or any
      subsidiaries of the Company.  Neither the Stockholder nor any affiliate is
      a party to any agreement or arrangement  that would result,  separately or
      in the  aggregate,  in the actual or deemed  payment  by the  Company or a
      Company  subsidiary of any "excess parachute  payments" within the meaning
      of Section 280G of the Code.

            (f)   Vote Required.  The affirmative vote of the holders of
      Company Common Stock, is the only vote of the holders of any class or
      series of capital stock of the Company necessary to approve the Merger.

            (g) Full Disclosure. No representation or warranty of the Company or
      the  Stockholder  in this  Agreement,  nor any  statement  or  certificate
      furnished or to be furnished to the Parent pursuant to this Agreement,  or
      in  connection  with  the  transactions  contemplated  by this  Agreement,
      contains or will contain any untrue statement of a material fact, or omits
      or will omit to state a material  fact  necessary  to make the  statements
      contained herein or therein not misleading.

            (h) Purchase Entirely for Own Account. The 8% Preferred Stock Series
      A will be acquired for investment for the Stockholder's  own account,  not
      as a nominee or agent,  and not with a view to the resale or  distribution
      of any part  thereof,  and the  Stockholder  has no present  intention  of
      selling,  granting any  participation  in, or otherwise  distributing  the
      same. The Stockholder  further  represents  that the Stockholder  does not
      presently have any contract,  undertaking,  agreement or arrangement  with
      any person to sell,  transfer or grant  participation to such person or to
      any third person, with respect to any of the 8% Preferred Stock Series A.

            (i)  Investment  Experience.   The  Stockholder  is  an  experienced
      investor  and  acknowledges  that it can  bear  the  economic  risk of its
      investment  and has such knowledge and experience in financial or business
      matters  that it is  capable  of  evaluating  the  merits and risks of the
      investment  in the 8%  Preferred  Stock  Series  A. The  Stockholder  also
      represents  it has not been  organized for the purpose of acquiring the 8%
      Preferred Stock Series A.

            (j) Restricted Securities.  The Stockholder  understands that the 8%
      Preferred  Stock  Series A, and the shares of Common Stock  issuable  upon
      conversion thereof, are characterized as "restricted securities" under the
      federal  securities  laws  inasmuch  as they are being  acquired  from the
      Parent in a  transaction  not  involving a public  offering and that under
      such laws and  applicable  regulations  such shares may be resold  without
      registration under the 1933 Act only in certain limited circumstances.  In
      this connection,  the Stockholder  represents that it is familiar with SEC
      Rules 144 and 144A,  as presently in effect,  and  understands  the resale
      limitations imposed thereby and otherwise by the 1933 Act.

            (k) Access to  Information.  The  Stockholder  has had access to the
      management  and  records of the Parent and has had an  opportunity  to ask
      questions of management of the Parent regarding its business and affairs.


                     ARTICLE VI.  COVENANTS OF THE PARENT

            The Parent  covenants and agrees with the Stockholder  that, so long
as any of the 8% Preferred Stock Series A are outstanding:

            Section   6.01.   Financial   Statements,   Reports,   Etc.Financial
Statements, Reports, Etc. So long as the Stockholder owns shares of 8% Preferred
Stock  Series A, the Parent  shall  furnish to the  Stockholder,  within 30 days
after the Parent  files with the  Commission,  copies of its annual  reports and
other  information,  documents and reports (or copies of such portions of any of
the foregoing as the Commission may by rules and regulations  prescribe) that it
is required to file with the Commission pursuant to Section 13 or 14 of the 1934
Act.

            Section 6.02.  Reserve for Conversion  SharesReserve  for Conversion
Shares.  The Parent  shall at all times  reserve and keep  available  out of its
authorized but unissued shares of Common Stock, for the purpose of effecting the
conversion  of  the 8%  Preferred  Stock  Series  A,  such  number  of its  duly
authorized  shares  of  Common  Stock as  shall  be  sufficient  to  effect  the
conversion of the 8% Preferred Stock Series A from time to time outstanding.  If
at any time the number of authorized  but unissued  shares of Common Stock shall
not be sufficient to effect the  conversion of the 8% Preferred  Stock Series A,
the Parent shall  forthwith  take such  corporate  action as may be necessary to
increase its  authorized  but unissued  shares of Common Stock to such number of
shares as shall be  sufficient  for such  purpose.  The Parent  shall obtain any
authorization,  consent, approval or other action by or make any filing with any
court  or  administrative  body  that may be  required  under  applicable  state
securities  laws in connection  with the issuance of shares of Common Stock upon
conversion of the 8% Preferred Stock Series A.

            Section 6.03. Debt RestrictionDebt Restriction. The Parent shall not
Incur any Debt unless after  giving  effect to such  Incurrence  the Debt of the
Parent will not exceed 60% of the  appraised  value of the assets of the Parent;
provided that,  notwithstanding the foregoing,  the Parent may at any time Incur
Debt in an amount which does not exceed the principal amount of outstanding Debt
of the Parent  extended,  refinanced,  renewed  or  replaced  with the  proceeds
thereof, plus any costs associated with the extension,  refinancing,  renewal or
replacement.

            Section 6.04. Payment of Dividends on the 7% Preferred Stock and the
8% Preferred  StockPayment  of  Dividends  on the 7% Preferred  Stock and the 8%
Preferred  Stock.  For so  long  as any 8%  Preferred  Stock  Series  A  remains
outstanding,  the Parent  shall  continue to pay  dividends  on the 7% Preferred
Stock and the 8% Preferred Stock in good faith so long as it has funds available
therefor.


             ARTICLE VII.  SURVIVAL OF REPRESENTATIONS; INDEMNITY

            Section 7.01.  SurvivalSurvival.  Each and every  representation and
warranty  contained in this  Agreement  shall  survive the Closing and shall not
merge  into  the  documents  delivered  at the  Closing,  but  instead  shall be
independently  enforceable  except  to  the  extent  expressly  limited  herein;
provided, however, each of the representations and warranties of the Stockholder
contained in Sections  3.05(a)(i)  through (vii), (x) and (xiii) shall terminate
on  the  first   anniversary   of  the  Closing  Date  and  each  of  the  other
representations of the Stockholder and each of the representations of the Parent
shall  terminate on the sixth  anniversary of the Closing Date. No party to this
Agreement  shall be  permitted  to make any claim  against  any other  party for
breach of  representation or warranty unless the amount claimed in good faith by
the claiming party exceeds in the aggregate $10,000.

            Section 7.02. Indemnification by the  StockholderIndemnification  by
the Stockholder. The Stockholder shall indemnify and hold each of the Parent and
Sub harmless  against any and all claims,  losses,  damages,  penalties,  fines,
forfeitures, reasonable attorneys' fees and expenses and related costs, expenses
of litigation,  judgments, and any other costs, fees and expenses resulting from
(i) a breach of a  representation  or warranty  made by the  Stockholder  or the
Company  under this  Agreement,  (ii) all Taxes that may be imposed or  asserted
with respect to the Company or its assets or operations in respect of any period
or portion  thereof  ending on or before the Closing Date, and any Taxes arising
as a result of the Merger (whether in accordance  with Internal  Revenue Service
Notice 88-19, under Section 1445 of the Code, or otherwise), or (iii) an action,
suit or proceeding brought or filed against the Company, the Parent or Sub based
on acts or omissions of the Company occurring prior to the Closing Date.

            Section 7.03.  Indemnification by the  ParentIndemnification  by the
Parent. The Parent shall indemnify and hold the Stockholder harmless against any
and all claims,  losses,  damages,  penalties,  fines,  forfeitures,  reasonable
attorneys'  fees  and  expenses  and  related  costs,  expenses  of  litigation,
judgments,  and any other costs, fees and expenses  resulting from a breach of a
representation or warranty made by the Parent under this Agreement.

            Section 7.04. Indemnification  ProceduresIndemnification Procedures.
Promptly after receipt by an indemnified  party under this Article VII 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 this Article
VII,  notify the  indemnifying  party in writing  of the  commencement  thereof;
provided, however, that the failure so to notify the indemnifying party will not
relieve it from any liability which it may have under this Article VII except to
the extent it has been  materially  prejudiced  by such failure  and,  provided,
further, that the failure to notify the indemnifying party shall not relieve the
indemnifying party from any liability which it may have to any indemnified party
otherwise  than  under  this  Article  VII.  In case any such  action is brought
against any indemnified  party,  and it notifies the  indemnifying  party of the
commencement  thereof,  the  indemnifying  party will be entitled to participate
therein and to the extent that it may wish, to assume the defense thereof,  with
counsel  satisfactory to such indemnified  party (who shall not, except with the
consent of the indemnified party, be counsel to the indemnifying  party).  After
notice from the indemnifying  party to such indemnified party of its election so
to assume the defense of such claim or action,  the indemnifying  party will not
be liable to such  indemnified  party  under this  Article  VII for any legal or
other expenses  subsequently  incurred by such  indemnified  party in connection
with the defense thereof other than reasonable costs of investigation; provided,
that the  indemnified  party  shall  have the right to employ  separate  counsel
(including local counsel),  and the indemnifying party shall bear the reasonable
fees,  costs and  expenses  of such  separate  counsel if (i) the use of counsel
chosen by the  indemnifying  party to  represent  the  indemnified  party  would
present such counsel with a conflict or potential conflict of interest, (ii) the
actual or potential  defendants  in, or targets of, any such action include both
the indemnified party and the indemnifying party and the indemnified party shall
have  reasonably  concluded  that there may be legal  defenses  available  to it
and/or other indemnified parties which are different from or additional to those
available to the indemnifying party, (iii) the indemnifying party shall not have
employed  counsel  satisfactory  to  the  indemnified  party  to  represent  the
indemnified  party within a reasonable time after notice of the  commencement of
such action or (iv) the indemnifying party shall authorize the indemnified party
to  employ  separate  counsel  at the  expense  of the  indemnifying  party.  No
indemnifying party shall be liable for any settlement of any action or claim for
monetary  damages which an  indemnified  party may effect without the consent of
the indemnifying  party, which consent shall not be unreasonably  withheld.  The
indemnification obligations hereunder are payable as they are incurred.


                         ARTICLE VIII.  MISCELLANEOUS

            Section 8.01.  ExpensesExpenses.  The Parent agrees to pay on demand
all reasonable out-of-pocket costs and expenses of the Stockholder in connection
with the execution and delivery of the Basic  Agreements and the other documents
to be delivered under the Basic Agreements.

            Section  8.02.  AssignmentAssignment.  This  Agreement  may  not  be
assigned by operation of law or otherwise without the express written consent of
each of the parties hereto.

            Section 8.03. Benefit; Successors and AssignsBenefit; Successors and
Assigns.  Except as otherwise  provided herein,  this Agreement shall be binding
upon and shall inure to the benefit of the parties  hereto and their  respective
successors and permitted assigns;  provided,  however, that this Agreement shall
not inure to the benefit of any successor or assignee unless such assignee shall
have complied with the terms of Section 8.02.  Nothing in this Agreement  either
express or implied is intended  to confer on any person,  other than the parties
hereto and their  respective  successors  and  permitted  assigns,  any  rights,
remedies or obligations under or by reason of this Agreement.

            Section 8.04. Specific PerformanceSpecific  Performance. The parties
hereto agree that  irreparable  damage would occur in the event any provision of
this  Agreement was not  performed in accordance  with the terms hereof and that
the parties shall be entitled to specific  performance  of the terms hereof,  in
addition to any other remedy at law or equity.

            Section 8.05. NoticesNotices.  All notices,  requests,  consents and
other  communications  hereunder  shall be in writing and shall be  delivered in
person or mailed by certified or registered mail, return receipt  requested,  or
telecopied in the case of non-U.S. residents, addressed as follows:

            (a)   if to the Parent or the Sub:

                  126 East 56th Street
                  New York, New York  10022
                  Attention:  President
                  Fax:  (212) 605-7199

                  with a copy to:

                  Shearman & Sterling
                  599 Lexington Avenue
                  New York, New York  10022
                  Attention:  F. H. Moore, Jr.
                  Fax:  (212) 848-7179

            (b)   if to the Stockholder or the Company:

                  CGR Advisors
                  950 East Paces Ferry Road
                  Suite 2275
                  Atlanta GA  30326-1119
                  Attention:  President
                  Fax:  (404) 239-6069

                  with a copy to:

                  Arnall, Golden & Gregory
                  2800 One Atlantic Center
                  1201 West Peachtree Street
                  Atlanta, GA  30309-3400
                  Attention:  James E. Dorsey
                  Fax:  (404) 873-8609

or, in any such case,  at such other  address  or  addresses  as shall have been
furnished  in  writing  by such  party to the  others.  All  notices,  requests,
consents and other  communications  hereunder  shall be deemed to have been duly
given  or  served  on the  date on  which  personally  delivered  or on the date
actually  received,   if  sent  by  mail,  telecopier  or  telex,  with  receipt
acknowledged.

            Section 8.06.  Governing LawGoverning Law.  This Agreement shall
be governed by and construed in accordance with the laws of the State of New
York.

            Section 8.07.  Entire  AgreementEntire  Agreement.  This  Agreement,
including  the Schedules and Exhibits  hereto,  constitutes  the sole and entire
agreement  of the  parties  with  respect  to the  subject  matter  hereof.  All
Schedules and Exhibits hereto are hereby incorporated herein by reference.

            Section  8.08.  CounterpartsCounterparts.   This  Agreement  may  be
executed in two or more counterparts, each of which shall be deemed an original,
but all of which together shall constitute one and the same instrument.

            Section  8.09.  AmendmentsAmendments.  This  Agreement  may  not  be
amended or modified, and no provisions hereof may be waived, without the written
consent of the Parent and the Stockholder.

            Section  8.10.  SeverabilitySeverability.  If any  provision of this
Agreement  shall  be  declared  void  or   unenforceable   by  any  judicial  or
administrative  authority, the validity of any other provision and of the entire
Agreement shall not be affected thereby.

            Section 8.11. Titles and SubtitlesTitles  and Subtitles.  The titles
and subtitles used in this Agreement are for convenience  only and are not to be
considered  in  construing  or  interpreting  any  term  or  provision  of  this
Agreement.

            Section 8.12. Further AssurancesFurther  Assurances.  From and after
the date of this Agreement,  upon the request of the Parent or the  Stockholder,
the Parent and the  Stockholder  shall  execute  and deliver  such  instruments,
documents  and other  writings as may be  reasonably  necessary  or desirable to
confirm and carry out and to  effectuate  fully the intent and  purposes of this
Agreement.


<PAGE>


            IN WITNESS WHEREOF, the Parent, Sub, the Company and the Stockholder
have executed this Agreement as of the day and year first above written.


                                          CORNERSTONE PROPERTIES INC.


                                       By:
                                      Name:
                                     Title:


                                          CSTONE-PITTSBURGH TRUST


                                       By:
                                      Name:
                                     Title:


                                          HEXALON REAL ESTATE, INC.


                                       By:
                                      Name:
                                     Title:


                                          FRICK BUILDING INC.


                                       By:
                                      Name:
                                     Title:


<PAGE>


                                  EXHIBIT A


[Stockholders' Agreement dated November [__], 1996 between the Parent and the
                            Stockholder - Recital]


<PAGE>


                                  EXHIBIT B


       [Certificate of Formation of the Surviving Corporations - 2.04]


<PAGE>


                                  EXHIBIT C


   [Certificate of Designation for the 8% Preferred Stock Series A - 2.06]

                                      35

<PAGE>

                                 EXHIBIT R-A


                            [Property Description]


                                      36
<PAGE>
                                 EXHIBIT R-B


                           [Personal Property List]


                                      37
<PAGE>

                                 EXHIBIT R-C


                               [Document List]


                                       1

<PAGE>


                                 EXHIBIT R-D


                       Form of Non-Foreign Certificate


                           NON-FOREIGN CERTIFICATE
                              The Frick Building
                           Pittsburgh, Pennsylvania


      To  inform   Cornerstone   Properties  Inc.,  a  Nevada  corporation  (the
"Transferee"),  that  withholding  of tax  under  Section  1445 of the  Internal
Revenue Code of 1986,  as amended (the  "Code"),  will not be required  upon the
transfer  of  certain  real  property  to the  Transferee  by  _____________,  a
_________________  (the  "Transferor"),  the  undersigned  hereby  certifies the
following on behalf of the Transferor:

      1.    The Transferor is not a foreign corporation, foreign partnership,
foreign trust, or foreign estate (as those terms are defined in the Code and
the Income Tax Regulations promulgated thereunder);

      2.    The Transferor's U.S. employer identification number is
__________; and

      3.    The Transferor's office address is:




The  Transferor  understands  that  this  Certificate  may be  disclosed  to the
Internal  Revenue  Service  by the  Transferee  and  that  any  false  statement
contained herein could be punished by fine, imprisonment or both.

      Under penalty of perjury,  I declare that I have examined this Certificate
and to the best of my knowledge and belief it is true, correct and complete, and
I further  declare that I have  authority to sign this document on behalf of the
Transferor.

Date:  November __, 1996

                                          "Transferor"

                                          FRICK BUILDING, INC.



                                          By: ________________________
                                              Name:
                                              Title:


<PAGE>
                                 EXHIBIT R-E


                            Form of Tenant Estoppel

To:   Cornerstone Properties Inc. ("Buyer")

Re:   The Frick Building, Pittsburgh, Pennsylvania (the "Property")


      The    undersigned    ______________________________,    a   _____________
("Tenant"),  is the tenant under that  certain  lease dated  _____________  (the
"Lease," which term shall include the amendments,  if any, referred to below) by
and between Tenant and Frick Building,  Inc., as lessor  ("Landlord"),  covering
premises  commonly  known as [Suite  ____________]  in the Property (the "Leased
Premises"). Tenant hereby certifies the following as of the date hereof:

      1.    Tenant is the tenant under the Lease demising the Leased
Premises.  The term of the Lease commenced on ___________________ and will
expire on _________________.

      2.    Tenant certifies to Buyer that:

      i.    the Lease is in full force and effect and has not been cancelled,
            modified, assigned, extended or amended except as follows:




      ii.   the current monthly rent for the Leased Premises as of
            ___________ is $_______ and has been paid through
            ------------------;

      iii.  the  total  current   additional/escalation  rent  for  common  area
            maintenance,  real estate taxes, insurance and the like (all charges
            other than fixed  rent) as of October 1, 1996 is  $_______  and such
            additional rent is payable monthly;

      iv.   no installment of rent under the Lease has been paid more than
            thirty (30) days in advance;

      v.    the Lease has been neither assigned nor any portion of the Leased
            Premises subleased by Tenant except as follows:




      vi.   Tenant has no existing defenses, offsets, deductions,  liens, claims
            or  credits  against  the  rentals  under the Lease or  against  the
            enforcement  of the Lease by Landlord,  and, to the best of Tenant's
            knowledge, Landlord is not in default under the Lease; and

      vii.  Tenant has paid a security deposit in the amount of $___________.

      3. This  certification  is made to induce Buyer to acquire the Property of
which the Leased Premises are part. Tenant further  acknowledges and agrees that
the addressees hereof and their respective successors and assigns and the holder
of any mortgage at any time  encumbering the Property from and after the date of
this  Tenant  Estoppel  Certificate  shall have the right to rely on this Tenant
Estoppel Certificate.

      4. Tenant acknowledges that in connection with the sale of the Property by
Landlord to Buyer all of the  interest of the  Landlord in and to the Lease will
be duly assigned to Buyer and that,  after notice from  Landlord and Buyer,  all
rent payments  under the Lease shall be paid to Buyer or its  authorized  agent,
from and after the date of sale.

      5.    The undersigned is authorized to execute this Tenant Estoppel
Certificate on behalf of Tenant.

Dated this ___ day of ___________, 1996.


                                                [Tenant]


                                                By:_________________________
Name:
Title:




<PAGE>

                             EXHIBIT R-F


                             [Leasing Commissions]


<PAGE>
                                  EXHIBIT R-G


                                 [Litigation]


<PAGE>


                                 EXHIBIT R-H


                         [Liens on Personal Property]


<PAGE>
                                 EXHIBIT R-I


                              [Security Deposits]


<PAGE>
                       AGREEMENT AND PLAN OF MERGER



                                    Among



                         CORNERSTONE PROPERTIES INC.,

                          CSTONE - PITTSBURGH TRUST,

                             FRICK BUILDING, INC.

                                     and

                          HEXALON REAL ESTATE, INC.



                         Dated as of November 7, 1996










<PAGE>
                               TABLE OF CONTENTS

                                                                            Page

ARTICLE I.  DEFINITIONS....................................................  1
      Section 1.01.  Definitions...........................................  1

ARTICLE II.  THE MERGER....................................................  6
      Section 2.01.  The Merger............................................  6
      Section 2.02.  Effective Time; Closing...............................  6
      Section 2.03.  Effect of the Merger..................................  6
      Section 2.04.  Certificate of Formation; Bylaws......................  6
      Section 2.05.  Directors and Officers................................  7
      Section 2.06.  Conversion of Company Shares..........................  7
      Section 2.07.  Conversion of Sub Common Stock........................  7

ARTICLE III.  CERTAIN MATTERS PERTAINING TO
                          REAL ESTATE AND THE COMPANY......................  7
      Section 3.01.  Delivery of Materials for Review......................  7
      Section 3.02.  As-Is Clause..........................................  7
      Section 3.03.  Closing Deliveries....................................  8
      Section 3.04.  Closing Costs and Prorations..........................  9
      Section 3.05.  Stockholder's Representations and Warranties.......... 12
      Section 3.06.  Brokerage Commission.................................. 15
      Section 3.07.  Company Dividend...................................... 16
      Section 3.08.  Transfer of Company Note.............................. 16

ARTICLE IV.  CONDITIONS.................................................... 16
      Section 4.01.  Conditions to the Merger.............................. 16
      Section 4.02.  Conditions to the Obligations of the Stockholder...... 16
      Section 4.03.  Conditions to the Obligations of the Parent........... 18

ARTICLE V.  REPRESENTATIONS AND WARRANTIES................................. 18
      Section 5.01.  Representations and Warranties of the Parent and
            the Sub........................................................ 18
      Section 5.02.  Representations and Warranties of the Stockholder
            and the Company................................................ 23

ARTICLE VI.  COVENANTS OF THE PARENT....................................... 26
      Section 6.01.  Financial Statements, Reports, Etc.................... 26
      Section 6.02.  Reserve for Conversion Shares......................... 26
      Section 6.03.  Debt Restriction...................................... 26
      Section 6.04.  Payment of Dividends on the 7% Preferred Stock and
            the 8% Preferred Stock......................................... 26

ARTICLE VII.  SURVIVAL OF REPRESENTATIONS; INDEMNITY....................... 27
      Section 7.01.  Survival.............................................. 27
      Section 7.02.  Indemnification by the Stockholder.................... 27
      Section 7.03.  Indemnification by the Parent......................... 27
      Section 7.04.  Indemnification Procedures............................ 27

ARTICLE VIII.  MISCELLANEOUS............................................... 28
      Section 8.01.  Expenses.............................................. 28
      Section 8.02.  Assignment............................................ 28
      Section 8.03.  Benefit; Successors and Assigns....................... 28
      Section 8.04.  Specific Performance.................................. 29
      Section 8.05.  Notices............................................... 29
      Section 8.06.  Governing Law......................................... 30
      Section 8.07.  Entire Agreement...................................... 30
      Section 8.08.  Counterparts.......................................... 30
      Section 8.09.  Amendments............................................ 30
      Section 8.10.  Severability.......................................... 30
      Section 8.11.  Titles and Subtitles.................................. 30
      Section 8.12.  Further Assurances.................................... 30


EXHIBIT A     Stockholders' Agreement dated November 7, 1996 between the
              Parent  and the Stockholder - Recital
EXHIBIT B     Certificate of Formation of the Surviving Corporation - 2.04
EXHIBIT C     Certificate of Designation for the 8% Preferred Stock Series A
              - 2.06


EXHIBIT R-A Property  Description EXHIBIT R-B Personal Property List EXHIBIT R-C
Document List EXHIBIT R-D Form of  Non-Foreign  Certificate  EXHIBIT R-E Form of
Tenant Estoppel
EXHIBIT R-F Leasing  Commissions-Protection Lists EXHIBIT R-G Litigation EXHIBIT
R-H Liens on Personal Property EXHIBIT R-I Security Deposits




EXHIBIT 2.2

            PREFERRED  STOCK  PURCHASE  AGREEMENT  dated as of November 22, 1996
between CORNERSTONE  PROPERTIES INC., a Nevada corporation (the "Company"),  the
NEW YORK STATE TEACHERS' RETIREMENT SYSTEM (the "Purchaser").-

            WHEREAS,  the Company  wishes to issue and sell to the  Purchaser an
aggregate of 689,655 shares (the "Preferred Shares") of the 1,034,483 authorized
but unissued shares of 8% Cumulative  Convertible  Preferred Stock,  without par
value, of the Company (the "8% Preferred Stock"); and

            WHEREAS,  the Purchaser,  wishes to purchase the Preferred Shares on
the terms and subject to the conditions set forth in this Agreement;

            NOW,  THEREFORE,  in  consideration  of the  premises and the mutual
covenants contained in this Agreement, the parties agree as follows:


                            ARTICLE I.  DEFINITIONS

            Section 1.01. DefinitionsDefinitions. As used in this Agreement, the
following terms shall have the following meanings:

            "Aggregate  Purchase  Price" means the amount set forth opposite the
      Purchaser's  name on  Schedule  2.01 hereto  under the caption  "Aggregate
      Purchase Price."

            "Basic Agreements" means this Agreement and the Stockholders'
      Agreement.

            "Business  Day" means any day other than a  Saturday,  Sunday or any
      other day on which  commercial  banks are required by law or authorized to
      close in New York City.

            "By-laws" means the By-laws of the Company, as amended from time
to time.

            "Capital  Stock"  means,  with  respect to any  Person,  any and all
      shares,   interests,   participations   or  other   equivalents   (however
      designated) of such Person's capital stock and all joint venture interests
      (however  designated)  whether now outstanding or issued after the Closing
      Date,  including,  without limitation,  all common stock and all preferred
      stock.


            "Charter" means the Certificate of Incorporation of the Company,  as
      amended or restated from time to time.

            "Closing" has the meaning specified in Section 2.02.

            "Closing Date" has the meaning specified in Section 2.02.

            "Commission" means the United States Securities and Exchange
      Commission.

            "Commission Filings" has the meaning specified in Section 4.01(1).

            "Common Stock" means the common stock of the Company, without par
      value.

            "Conversion  Shares"  means  the  Common  Stock or other  securities
      issued upon conversion of the 8% Preferred Stock.

            "8% Preferred  Stock Series A" means the 8%  Cumulative  Convertible
      Preferred Stock Series A of the Company, without par value.

            "Fair  Market  Value"  means  the fair  market  value of the item in
      question  as  determined  by a majority of the Board of  Directors  of the
      Company  acting in good faith and in exercise of its fiduciary  duties and
      evidenced by a resolution of the Board of Directors.

            "Lien" means,  with respect to any Property,  any pledge,  mortgage,
      lien,  charge,  security interest or encumbrance of any kind in respect of
      such Property, except that Lien shall not mean any license or right to use
      intellectual  property of the Company granted by the Company or any rights
      of banks to set off deposits against debts to said banks.

            "Material  Adverse  Effect" means a material  adverse  effect on the
      business, operations,  properties or condition (financial or otherwise) of
      the Company and its Subsidiaries, taken as a whole.

            "1933  Act"  means the  United  States  Securities  Act of 1933,  as
      amended,  and the rules  and,  unless  the  context  indicates  otherwise,
      regulations  of the  Commission  thereunder,  all as the same  shall be in
      effect from time to time.

            "1934 Act" means the United States Securities  Exchange Act of 1934,
      as amended,  and, unless the context  indicates  otherwise,  the rules and
      regulations  of the  Commission  thereunder,  all as the same  shall be in
      effect from time to time.

            "Public  Offering" means an  underwritten  public offering of equity
      securities of the Company pursuant to an effective  registration statement
      under the 1933 Act.

            "Purchaser" means the New York State Teachers' Retirement System.

            "Qualified  Public Offering" means a Public Offering of Common Stock
      to be listed on the New York Stock Exchange in which (i) the aggregate net
      proceeds to the  Company  (after  payment of all fees and  expenses of the
      offering  and  pay-down  of any then  remaining  debt  under the Term Loan
      Agreement,  dated as of August 8, 1995,  between the Company and  Deutsche
      Bank AG  (London))  together  with the net  proceeds  of any prior  public
      offerings of Common Stock listed on the New York Stock  Exchange  equal or
      exceed US$200 million, (ii) the expected distributions on shares of Common
      Stock of the  Company for the 12 months  following  the  Qualified  Public
      Offering (as certified by the treasurer or chief financial  officer of the
      Company)  divided  by the public  offering  price is less than or equal to
      7.75% and (iii) (A) if the Qualified  Public  Offering is completed in the
      calendar year 1997 the public offering price is at least $16.00 per share,
      (B) if the  Qualified  Public  Offering is completed in the calendar  year
      1998 the public offering price is at least $16.50 per share and (C) if the
      Qualified  Public  Offering is completed in the  calendar  year 1999,  the
      public  offering  price is at least $17.00 per share;  provided,  however,
      that a  Qualified  Public  Offering  shall be deemed to occur on the first
      business day after any day the  condition  set forth in item (i) above and
      each of the following  conditions  is true:  (x) the day is after a Public
      Offering  and prior to  January 1, 2000,  (y) the  average of the  closing
      prices  for  shares  of Common  Stock as  reported  on the New York  Stock
      Exchange  composite tape for the 20 consecutive  trading days  immediately
      preceding  such  day (the  "Composite  Average")  equals  or  exceeds  the
      applicable  minimum  price  for  a  public  offering  to be  considered  a
      Qualified Public Offering at such time and (z) the expected  distributions
      on shares of Common Stock of the Company for the 12 months  following such
      day (as  certified  by the  treasurer  or chief  financial  officer of the
      Company) divided by the Composite Average is less than or equal to 7.75%.

            "Real Property Leases" has the meaning specified in Section
      4.01(p).

            "7% Preferred Stock" means the 7% Cumulative  Convertible  Preferred
      Stock of the Company, without par value.

            "Stockholders' Agreement" means the Stockholders' Agreement dated as
      of November 22,  1996,  among the Company,  the  Purchaser  and such other
      purchasers of 8% Preferred  Stock as may become party thereto from time to
      time, set forth as Exhibit A hereto.

            "Subsidiary"  means any  company,  corporation  or joint  venture of
      which at the time of determination the Company, directly and/or indirectly
      through one or more Subsidiaries,  owns, or one or more other Subsidiaries
      own, more than 50% of the Voting Stock or the Company controls,  or one or
      more other Subsidiaries  control,  the composition of more than 50% of the
      board of directors or comparable governing body thereof.

            "Voting Stock" means, with respect to any Person,  securities of any
      class or classes of Capital  Stock of such  Person  entitling  the holders
      thereof  (whether at all times or only so long as no senior class of stock
      has voting power by reason of any  contingency) to vote in the election of
      members of the board of directors or other  governing  body of such Person
      but  does not  include  Capital  Stock  having  the  right to vote in such
      election solely upon the happening of a contingency  unless and until such
      contingency has occurred,  and then only so long as such Capital Stock has
      voting rights with respect thereto.


            ARTICLE II.  THE SALE AND PURCHASE OF PREFERRED SHARES

            Section  2.01.  Obligations  to  Sell  and  Purchase  the  Preferred
SharesObligations  to Sell and Purchase the Preferred  Shares.  In reliance upon
the  representations  and warranties made herein and subject to the satisfaction
or waiver of the  conditions  set forth herein,  the Company agrees to issue and
sell to the  Purchaser,  and the Purchaser  agrees to purchase from the Company,
the number of  Preferred  Shares set forth  opposite  the name of the  Purchaser
under the heading "Number of Preferred Shares to be Purchased" on Schedule 2.01,
at the  aggregate  purchase  price set forth  opposite the name of the Purchaser
under the heading "Aggregate Purchase Price" on Schedule 2.01.

            Section 2.02. The Closing.The  Closing. The closing shall take place
at the offices of Shearman & Sterling,  599 Lexington Avenue, New York, New York
10022, on November 22, 1996, or at such other location,  date and time as may be
agreed upon between the Purchaser and the Company (such closing being called the
"Closing"  and such date and time  being  called  the  "Closing  Date").  At the
Closing,  the  Company  shall  issue  and  deliver  to  the  Purchaser  a  stock
certificate or  certificates in definitive  form,  registered in the name of the
Purchaser,  representing  the  Preferred  Shares  being  purchased  by it at the
Closing. As payment in full for the Preferred Shares being purchased by it under
this Agreement,  and against  delivery of the stock  certificate or certificates
therefor on the Closing Date, the Purchaser shall deliver to the Company a check
payable to the order of the Company in the amount set forth opposite the name of
the Purchaser under the heading "Aggregate  Purchase Price" on Schedule 2.01, or
shall transfer such amount to the account of the Company by wire transfer.

            Section 2.03. Further  Action.Further Action. During the period from
the date hereof to the Closing Date, the Company and the Purchaser shall use its
best efforts and take all action necessary or appropriate to satisfy the closing
conditions   contained  in  Section  3  hereof  and  to  cause  its   respective
representations and warranties  contained in Section 4 hereof to be complete and
correct  as of the  Closing  Date,  after  giving  effect  to  the  transactions
contemplated by this Agreement.


                           ARTICLE III.  CONDITIONS

            Section    3.01.    Conditions   to   the    Obligations    of   the
PurchaserConditions to the Obligations of the Purchaser.  The obligations of the
Purchaser under this Agreement shall be subject to the satisfaction or waiver of
the following conditions on or before the Closing Date:

            (a)   Stock Certificates.  The Company shall have issued and
      delivered to the Purchaser a stock certificate or certificates in
      definitive form, registered in the name of the Purchaser, representing
      the Preferred Shares being purchased by the Purchaser on the Closing
      Date;

            (b) Opinions of Company's Counsel. The Purchaser shall have received
      from Shearman & Sterling, counsel for the Company, and from Lionel, Sawyer
      & Collins, Nevada counsel for the Company, opinions dated the Closing Date
      in form and substance satisfactory to the Purchaser.

            (c)  Representations  and  Warranties  Complete  and  Correct.   The
      representations  and  warranties of the Company  contained in Section 4.01
      hereof shall have been complete and correct in all material respects as of
      the Closing Date.

            (d) Compliance with this Agreement. The Company shall have performed
      and complied in all material  respects with all agreements,  covenants and
      conditions contained herein which are required to be performed or complied
      with by it on or before the Closing Date.

            (e)  Officers'  Certificate.  The  Purchaser  shall have  received a
      certificate,  dated the Closing  Date and signed by the  President  or any
      Vice  President and attested by the  Secretary of the Company,  certifying
      that the  conditions  set  forth  in  Sections  3.01(c)  and  3.01(d)  are
      satisfied on and as of such date.

            (f) Consents; Permits. The Company shall have received all consents,
      permits, approvals and other authorizations that may be required from, and
      made all such  filings and  declarations  that may be required  with,  any
      person pursuant to any law, statute,  regulation or rule (federal,  state,
      local and foreign), or pursuant to any agreement, order or decree by which
      the  Company  or any of its  assets  is  bound,  in  connection  with  the
      transactions  contemplated  by  this  Agreement,  except  for  (a)  notice
      requirements which may be fulfilled subsequent to the Closing Date and (b)
      consents, permits, approvals, authorizations, filings and declarations the
      failure to obtain or to  undertake  (i) could not have a Material  Adverse
      Effect on the  Company or (ii) could not  adversely  affect the ability of
      the Company to perform its obligations  under the Basic  Agreements or any
      agreement executed in accordance therewith.

            (g)   Stockholders' Agreement.  The Company shall have executed
      and delivered the Stockholders' Agreement.

            (h)   [Reserved].

            (i)    Supporting Documents.  The Purchaser and its counsel shall
      have received copies of the following documents:

            (i)  (A)  the  Charter,  certified  as  of  a  recent  date  by  the
            appropriate    authority   of   the   Company's    jurisdiction   of
            incorporation, and (B) a certificate of such authority dated as of a
            recent  date as to the due  incorporation  and good  standing of the
            Company,  the  payment  of all  franchise  and  excise  taxes by the
            Company and listing all  documents  of the Company on file with said
            authority;

            (ii) a certificate of the Secretary or an Assistant Secretary of the
            Company  dated the Closing Date and  certifying:  (A) that  attached
            thereto is a true and complete  copy of the Bylaws of the Company as
            in  effect  on the date of such  certification;  (B)  that  attached
            thereto is a true and complete  copy of all  resolutions  adopted by
            the  Board  of  Directors  or  the   stockholders   of  the  Company
            authorizing  the  execution,  delivery and  performance of the Basic
            Agreements,  the issuance, sale and delivery of the Preferred Shares
            and the reservation, issuance and delivery of the Conversion Shares,
            and that all such  resolutions  are in full force and effect and are
            all the  resolutions  adopted in  connection  with the  transactions
            contemplated by the Basic  Agreements;  (C) that the Charter has not
            been amended  since the date of the last  amendment  or  restatement
            referred to in the certificate  delivered  pursuant to clause (i)(B)
            above;  (D) that the By-laws have not been amended since the date of
            the last amendment referred to in the certificate delivered pursuant
            to  clause  (ii)(A)  above;  and (E)  the  incumbency  and  specimen
            signature  of  each  officer  of the  Company  executing  any  Basic
            Agreement, the stock certificates  representing the Preferred Shares
            and any  agreement,  certificate  or instrument  furnished  pursuant
            hereto,  and a certification by another officer of the Company as to
            the incumbency and signature of the officer  signing the certificate
            referred to in this clause (ii)(E); and

            (iii) such  additional  supporting  documents and other  information
            with  respect to the  operations  and  affairs of the Company as the
            Purchaser may reasonably request.

            Section 3.02. Conditions to the Obligations of the CompanyConditions
to  the  Obligations  of the  Company.  The  Company's  obligations  under  this
Agreement  shall be  subject  to the  satisfaction  or waiver  of the  following
conditions on or before the Closing Date:

            (a) Opinion of Purchaser's  Counsel. The Company shall have received
      from the  Purchaser  and from  King &  Spalding,  special  counsel  to the
      Purchaser,   opinions  dated  the  Closing  Date  in  form  and  substance
      satisfactory to the Company.

            (b)  Compliance  with  this  Agreement.  The  Purchaser  shall  have
      performed  and  complied in all  material  respects  with all  agreements,
      covenants  and  conditions  contained  herein  which  are  required  to be
      performed or complied with by it on or before the Closing Date.

            (c) Purchaser's Representations and Warranties Complete and Correct.
      The Purchaser's  representations and warranties  contained in Section 4.02
      of this  Agreement  shall be complete  and correct  when made and shall be
      complete and correct at and as of the Closing Date, after giving effect to
      the transactions  contemplated by this Agreement,  as if made on and as of
      such date.

            (d)  Officers'  Certificate.  The  Company  shall  have  received  a
      certificate,  dated the Closing  Date and signed by the  President  or any
      Vice President and attested by the Secretary of the Purchaser,  certifying
      that the  conditions  set  forth  in  Sections  3.02(b)  and  3.02(c)  are
      satisfied on and as of such date.

            (e)  Additional  Documents.  The Company  shall have  received  such
      additional  supporting documents and other information with respect to the
      operations  and affairs of the  Purchaser  as the  Company may  reasonably
      request.


                  ARTICLE IV.  REPRESENTATIONS AND WARRANTIES

            Section 4.01.  Representations and Warranties of the
CompanyRepresentations and Warranties of the Company.  The Company represents
and warrants to the Purchaser as follows:

            (a)  Organization,  Good  Standing  and  Qualification.  Each of the
      Company and its  subsidiaries  is a corporation  duly  organized,  validly
      existing  and in good  standing  under  the  laws of its  jurisdiction  of
      incorporation,  and  each  of the  Company  and its  Subsidiaries  has all
      requisite  corporate  power and authority  under such laws to own or lease
      and operate its  properties and to carry on its business as now conducted.
      Each of the Company and its  Subsidiaries is duly qualified or licensed to
      do business as a foreign corporation in good standing in each jurisdiction
      in which the nature of the business  transacted  by it or the character of
      the  properties  owned or leased by it  requires  it to so  qualify  or be
      licensed,  except  where the failure to so qualify or be licensed or be in
      good standing would not have a Material  Adverse  Effect.  The Company has
      the  corporate  power and  authority  to execute,  deliver and perform the
      Basic  Agreements,  to issue,  sell and deliver the Preferred  Shares and,
      upon conversion thereof, to issue and deliver the Conversion Shares.

            (b) Authorization,  Enforceability. All corporate action on the part
      of the Company, its officers, directors and stockholders necessary for the
      authorization,  execution  and  delivery  of  the  Basic  Agreements,  the
      performance  of  all  obligations  of  the  Company   thereunder  and  the
      authorization, issuance, sale and delivery of the Preferred Shares and the
      Conversion  Shares has been taken or will be taken  prior to the  Closing.
      The Basic Agreements have been duly authorized,  executed and delivered by
      the Company and constitute  valid and legally  binding  obligations of the
      Company,  enforceable in accordance with their respective terms, except as
      enforceability  may  be  limited  by  applicable  bankruptcy,  insolvency,
      reorganization,  moratorium or similar laws  affecting the  enforcement of
      creditors'  rights generally and by general  principles of equity (whether
      enforcement is sought by proceedings in equity or at law).

            (c) No Conflict.  The  execution  and delivery by the Company of the
      Basic  Agreements,  the  performance  by the  Company  of its  obligations
      thereunder,  the issuance,  sale and delivery of the Preferred Shares and,
      upon  conversion  thereof,  the issuance  and  delivery of the  Conversion
      Shares,  will not violate any  provision of law, the Charter or By-laws of
      the Company, or, any order of any court or other agency of government,  or
      conflict with,  result in a breach of or constitute  (with notice or lapse
      of time or  both) a  default  under  any  indenture,  agreement  or  other
      instrument  by which the  Company  or any of its  properties  or assets is
      bound,  or result  in the  creation  or  imposition  of any lien,  charge,
      restriction,  claim or encumbrance of any nature  whatsoever  known to the
      Company upon any of the properties or assets of the Company or trigger any
      remedy  provision in any agreement or cause an adjustment in the Company's
      equity interest in any partnership or joint venture.

            (d) Outstanding Options,  Etc. As of the Closing Date, there are not
      outstanding  any  options,   warrants,  rights  (including  conversion  or
      preemptive rights) or agreements,  orally or in writing,  for the purchase
      or acquisition  from the Company of any shares of its capital stock except
      for  (1) the  conversion  privileges  of the 7%  Preferred  Stock,  the 8%
      Preferred  Stock and the 8%  Preferred  Stock  Series A and (2) options to
      purchase  up to 952,500  shares of Common  Stock that have been  issued to
      directors and employees of the Company.

            (e)   Valid Issuance of Securities.

            (i) The  Preferred  Shares,  when  issued,  sold  and  delivered  in
            accordance  with the terms  hereof for the  consideration  expressed
            herein,   will  be  duly  and   validly   issued,   fully  paid  and
            nonassessable.  The Common  Stock  issuable  upon  conversion  of 8%
            Preferred Stock has been duly and validly reserved for issuance, and
            upon  issuance in  accordance  with the  Charter,  shall be duly and
            validly issued, fully paid and non-assessable.

            (ii) Neither the issuance,  sale or delivery of the Preferred Shares
            nor, upon the  conversion  thereof,  the issuance or delivery of the
            Conversion Shares is subject to any preemptive right of stockholders
            of the  Company  arising  under law or the Charter or By-laws of the
            Company, to any contractual right of first refusal or other right in
            favor of any person.

            (f)   Litigation.   There  is  no  action,   suit,   proceeding   or
      investigation  pending or  currently  threatened  against the Company that
      questions the validity of the Basic Agreements or the right of the Company
      to  enter  into  them,  or to  consummate  the  transactions  contemplated
      thereby, or that might,  either  individually or in the aggregate,  have a
      Material  Adverse  Effect on the  Company,  or result in any change in the
      current  equity  ownership of the Company,  nor is the Company  aware that
      there  is any  basis  for the  foregoing.  The  Company  is not a party or
      subject to the  provisions  of any order,  writ,  injunction,  judgment or
      decree of any court or government agency or  instrumentality.  There is no
      action, suit, proceeding or investigation by the Company currently pending
      or which the Company intends to initiate.

            (g)   Governmental   Consents.   Assuming   the   accuracy   of  the
      representations  and  warranties  of  the  Purchaser  set  forth  in  this
      Agreement,   no  consent,   approval,   order  or  authorization   of,  or
      registration,  qualification, designation, declaration or filing with, any
      governmental  authority  on  the  part  of  the  Company  is  required  in
      connection with the consummation of the transactions  contemplated by this
      Agreement.

            (h) Compliance with Law and Other Instruments. The Company is not in
      conflict  with,  or in  default  or  violation  of,  (i)  any  law,  rule,
      regulation,  order, judgment or decree applicable to it or by which any of
      its  property  or assets  is bound or  affected,  or (ii) any note,  bond,
      mortgage,   indenture,   contract,   agreement,  lease,  license,  permit,
      franchise or other  instrument  or obligation to which it is a party or by
      which the  Company  or any  property  or asset of the  Company is bound or
      affected, except for any such conflicts, defaults or violations that would
      not, individually or in the aggregate, have a Material Adverse Effect.

            (i)  Disclosure.  The Company has fully provided each Purchaser with
      all the  information  which such  Purchaser  has  requested  for  deciding
      whether to acquire  the  Preferred  Shares and all  information  which the
      Company believes is reasonably  necessary to enable such Purchaser to make
      such  decision,  including  the Company's  Executive  Summary and Property
      Information  Book,  as  amended  or  supplemented  from  time to time (the
      "Executive  Summary").  Neither the Executive Summary,  this Agreement nor
      any  other  statement  or  certificate  made or  delivered  in  connection
      herewith  contains  any untrue  statement  of a material  fact or omits to
      state a material fact necessary to make the  statements  herein or therein
      not misleading,  except that, with respect to projections contained in the
      Executive Summary,  the Company represents only that such projections were
      prepared in good faith and that the Company believes there is a reasonable
      basis for such projections.

            (j) Securities  Reports.  All forms,  reports,  statements and other
      documents  filed by the Company with the  Commission  were prepared in all
      material  respects in accordance  with the  requirements of applicable law
      and did not at the time they were filed contain any untrue  statement of a
      material  fact or omit to state a  material  fact  required  to be  stated
      therein or necessary in order to make the statements  therein, in light of
      the circumstances under which they were made, not misleading.

            (k) Taxes.  The  Company  elected  to be  taxable  as a real  estate
      investment trust for federal income tax purposes  beginning with 1982, its
      first year of  existence.  The Company has filed all  material  income and
      franchise tax returns  required by  applicable  law to be filed by it, and
      has  timely  paid  all  taxes  shown  due on  such  returns.  There  is no
      agreement,  waiver or  consent  providing  for an  extension  of time with
      respect  to the  assessment  of any  tax or  tax  deficiency  against  the
      Company.  There is no action, suit,  proceeding,  investigation,  audit or
      claim now pending  against,  or with respect to, the Company in respect of
      any tax. The Company has not filed any  agreement or consent under Section
      341(f) of the Internal Revenue Code of 1986, as amended.

            (l) No Material Adverse Change.  Subsequent to December 31, 1995 and
      prior to the Effective Time, except as set forth in or contemplated by the
      Company's  Form 10K for its fiscal year ended  December 31, 1995, its Form
      10Qs for the  first  three  fiscal  quarters  of  fiscal  1996,  its proxy
      statement for its June 20, 1996 meeting of stockholders  (the  "Commission
      Filings") and this Agreement,  (i) there has not been any material adverse
      change or any development involving a prospective material adverse change,
      in the business,  properties,  business prospects, condition (financial or
      otherwise) or results of  operations of the Company and its  Subsidiaries,
      taken as a whole,  arising  for any reason  whatsoever,  (ii)  neither the
      Company  nor any  Subsidiary  has  incurred  or will  incur  any  material
      liabilities or obligations,  direct or contingent,  nor has the Company or
      any  Subsidiary   entered  into  nor  will  it  enter  into  any  material
      transactions  other than  pursuant  to this  Agreement,  the  issuance  of
      $66,500,000 of 8% Cumulative  Convertible  Preferred Stock,  Series A, the
      acquisition  of the Frick  Building in  Pittsburgh,  Pennsylvania  and the
      acquisition of One Lincoln Centre,  Oakbrook  Terrace,  Illinois and (iii)
      neither the Company nor any  Subsidiary  has or will have purchased any of
      its outstanding capital stock.

            (m) Title to Properties. To the Company's knowledge, the Company and
      the  Subsidiaries  have good and marketable title to [the Frick Building],
      One Lincoln  Centre,  Oakbrook  Terrace,  Illinois and all  properties and
      assets  described in the  Commission  Filings or the Executive  Summary as
      owned by them, free and clear of all liens,  security interests,  pledges,
      charges, encumbrances,  mortgages, defects or restrictions, except such as
      are described in the Commission  Filings or the Executive  Summary or such
      as do not have a Material Adverse Effect.

            (n)  Compliance  with  Laws.  To the  Company's  knowledge,  (a) the
      operations  of the Company and each  Subsidiary  with  respect to any real
      property currently leased or owned or by any means controlled by it are in
      compliance in all material  respects with all applicable  federal,  state,
      and  local  laws,   ordinances,   rules,   and  regulations   relating  to
      occupational  health and safety and the  environment,  and the Company and
      each Subsidiary has all licenses,  permits and authorizations necessary to
      operate under all such laws, ordinances,  rules and regulations and are in
      compliance  with all terms and  conditions of such  licenses,  permits and
      authorizations  except  where  the  failure  to  comply  would  not have a
      Material  Adverse  Effect;  (b) neither the Company nor any Subsidiary has
      authorized   or   conducted   or  has   knowledge   of   the   generation,
      transportation,  storage,  use,  treatment,  disposal  or  release  of any
      hazardous  substance,   hazardous  waste,  hazardous  material,  hazardous
      constituent, toxic substance, pollutant,  contaminant,  petroleum product,
      natural gas, liquefied gas or synthetic gas defined or regulated under any
      environmental  law on, in or under any real property of the Company or any
      Subsidiary  in any amount  which has a Material  Adverse  Effect;  and (c)
      there  is no  pending  or,  to the  best  knowledge  of the  Company,  any
      threatened claim, litigation or any administrative agency proceeding,  nor
      has the Company or any Subsidiary received any written or oral notice from
      any  governmental  entity or third party,  that (i) alleges a violation of
      any  laws,  ordinances,  rules  and  regulations  by the  Company  or such
      Subsidiary;  (ii) alleges the Company or such Subsidiary is a liable party
      under the Comprehensive Environmental Response Compensation, and Liability
      Act, 42 U.S.C.  ss. 9601 et seq, or any state superfund law; (iii) alleges
      possible   contamination  of  the  environment  by  the  Company  or  such
      Subsidiary; or (iv) alleges possible contamination of real property of the
      Company or any  Subsidiary,  which,  in any such case, is likely to have a
      Material Adverse Effect.

            (o)  Insurance.  Each  parcel of real  property  currently  owned or
      leased by the Company or any of its Subsidiaries is insured by insurers of
      recognized financial  responsibility  against such losses and risks and in
      such amounts as are prudent and customary in the  businesses in which they
      are engaged  and the Company has no reason to believe  that the Company or
      any of its Subsidiaries will not be able to renew their existing insurance
      coverage as and when such coverage  expires or to obtain similar  coverage
      from similar  insurers as may be necessary to continue their businesses at
      a cost that would not have a Material Adverse Effect.

            (p) Real Property  Leases.  The leases set forth on Schedule 4.01(p)
      hereto (the "Real Property Leases") are all of the leases with tenants who
      leased from the Company or any of its  Subsidiaries  50,000 square feet or
      more in any  one of the  Frick  Building,  Pittsburgh,  Pennsylvania,  One
      Lincoln Centre,  Oakbrook  Terrace,  Illinois,  or any of the other office
      buildings  described in the Commission  Filings as owned by the Company or
      any of its  Subsidiaries.  Each of the Real  Property  Leases is valid and
      enforceable  in  accordance  with its terms with respect to the Company or
      the Subsidiary of the Company party thereto,  and, to the knowledge of the
      Company,  is valid and  enforceable  in  accordance  with its  terms  with
      respect to each other party  thereto.  To the  knowledge  of the  Company,
      there is no existing breach, default or event of default or any event that
      with notice or lapse of time or both would constitute a breach, default or
      event of default by the Company or any Subsidiary of the Company under any
      of  the  Real  Property  Leases.  Neither  the  Company  nor  any  of  its
      Subsidiaries  has received notice of, or made a claim with respect to, any
      breach or default by any other party to any of the Real  Property  Leases.
      Neither the Company nor any Subsidiary of the Company has received notice,
      or has actual  knowledge,  that any of the Real  Property  Leases which is
      subject to renewal will not be renewed, or that a tenant a party to a Real
      Property  Lease will vacate the premises  upon  expiration  of such lease,
      except for the lease by Apache  Corporation  of 160,000 square feet in One
      Norwest Center, Denver, Colorado.

            Section    4.02.    Representations    and    Warranties    of   the
Purchaser.Representations   and  Warranties  of  the  Purchaser.  The  Purchaser
understands  that the  Preferred  Shares  are  being  offered  and sold  without
registration  under the 1933 Act in  reliance  upon the  exemption  provided  in
Section  4(2) of the 1933  Act.  The  Purchaser  further  understands  that such
exemption  depends in part  upon,  and such  Preferred  Shares are being sold in
reliance on, the representations  and warranties set forth in this Section.  The
Purchaser represents and warrants to the Company that:

            (a)  Authorization.  The  Purchaser  has full power and authority to
      enter  into  this  Agreement.  This  Agreement  constitutes  its valid and
      legally  binding  obligation,  enforceable  in accordance  with its terms,
      except  as  enforceability  may  be  limited  by  applicable   bankruptcy,
      insolvency,  reorganization,  moratorium  or similar  laws  affecting  the
      enforcement of creditors'  rights  generally and by general  principles of
      equity (whether enforcement is sought by proceedings in equity or at law).

            (b) Purchase Entirely for Own Account.  The Preferred Shares will be
      acquired for investment for the Purchaser's own account,  not as a nominee
      or agent,  and not with a view to the resale or  distribution  of any part
      thereof,  and the Purchaser has no present intention of selling,  granting
      any  participation  in, or otherwise  distributing the same. The Purchaser
      further   represents  that  it  does  not  presently  have  any  contract,
      undertaking, agreement or arrangement with any person to sell, transfer or
      grant  participations to such person or to any third person,  with respect
      to any of the Preferred Shares.

            (c) Investment Experience.  The Purchaser is an experienced investor
      and acknowledges  that it can bear the economic risk of its investment and
      has such knowledge and experience in financial or business matters that it
      is capable of  evaluating  the merits and risks of the  investment  in the
      Preferred Shares.

            (d)  Restricted  Securities.  The  Purchaser  understands  that  the
      Preferred Shares,  and the shares of Common Stock issuable upon conversion
      thereof,  are  characterized as "restricted  securities" under the federal
      securities  laws inasmuch as they are being acquired from the Company in a
      transaction  not involving a public  offering and that under such laws and
      applicable  regulations  such  shares may be resold  without  registration
      under  the  1933  Act  only  in  certain  limited  circumstances.  In this
      connection,  the Purchaser  represents  that it is familiar with SEC Rules
      144  and  144A,  as  presently  in  effect,  and  understands  the  resale
      limitations imposed thereby and otherwise by the 1933 Act.

            (e)  Access to  Information.  The  Purchaser  has had  access to the
      management  and records of the Company and has had an  opportunity  to ask
      questions of management of the Company regarding its business and affairs.


                           ARTICLE V.  MISCELLANEOUS

            Section 5.01. ExpensesExpenses.  The Company agrees to pay on demand
all reasonable  out-of-pocket  costs and expenses of the Purchaser in connection
with the execution and delivery of the Basic  Documents and the other  documents
to be delivered under the Basic Documents.

            Section  5.02.  AssignmentAssignment.  This  Agreement  may  not  be
assigned by operation of law or otherwise without the express written consent of
the Company (which consent may be granted or withheld in the sole  discretion of
the Company) and provided,  that any such  permitted  assignee shall execute the
Basic Agreements and become party thereto.

            Section 5.03. Benefit; Successors and AssignsBenefit; Successors and
Assigns.  Except as otherwise  provided herein,  this Agreement shall be binding
upon and shall inure to the benefit of the parties  hereto and their  respective
successors and permitted assigns;  provided,  however, that this Agreement shall
not inure to the benefit of any successor or assignee unless such assignee shall
have complied with the terms of Section 5.02.  Nothing in this Agreement  either
express or implied is  intended  to confer on any person  other than the parties
hereto and their  respective  successors  and  permitted  assigns,  any  rights,
remedies or obligations under or by reason of this Agreement.

            Section 5.04. NoticesNotices.  All notices,  requests,  consents and
other  communications  hereunder  shall be in writing and shall be  delivered in
person or mailed by certified or registered mail, return receipt  requested,  or
telecopied in the case of non-U.S. residents, addressed as follows:

            (a)   if to the Company:

                  126 East 56th Street
                  New York, New York 10022
                  Attention:  President

                  with a copy to:

                  Shearman & Sterling
                  599 Lexington Avenue
                  New York, New York 10022
                  Attention:  F. H. Moore, Jr.

            (b)   if to the Purchaser, to the address set forth below the
                  signature block for the Purchaser;

or, in any such case,  at such other  address  or  addresses  as shall have been
furnished  in  writing  by such  party to the  others.  All  notices,  requests,
consents and other  communications  hereunder  shall be deemed to have been duly
given  or  served  on the  date on  which  personally  delivered  or on the date
actually  received,   if  sent  by  mail,  telecopier  or  telex,  with  receipt
acknowledged.

            Section 5.05.  Governing LawGoverning Law.  This Agreement shall
be governed by and construed in accordance with the laws of the State of New
York.

            Section 5.06.  Entire  AgreementEntire  Agreement.  This  Agreement,
including  the Schedules and Exhibits  hereto,  constitutes  the sole and entire
agreement  of the  parties  with  respect  to the  subject  matter  hereof.  All
Schedules and Exhibits hereto are hereby incorporated herein by reference.

            Section  5.07.  CounterpartsCounterparts.   This  Agreement  may  be
executed in two or more counterparts, each of which shall be deemed an original,
but all of which together shall constitute one and the same instrument.

            Section  5.08.  AmendmentsAmendments.  This  Agreement  may  not  be
amended or modified, and no provisions hereof may be waived, without the written
consent of the Company and the holders of at least a majority of the outstanding
shares of 8% Preferred Stock.

            Section  5.09.  SeverabilitySeverability.  If any  provision of this
Agreement  shall  be  declared  void  or   unenforceable   by  any  judicial  or
administrative  authority, the validity of any other provision and of the entire
Agreement shall not be affected thereby.

            Section 5.10. Titles and SubtitlesTitles  and Subtitles.  The titles
and subtitles used in this Agreement are for convenience  only and are not to be
considered  in  construing  or  interpreting  any  term  or  provision  of  this
Agreement.

            Section 5.11. Further AssurancesFurther  Assurances.  From and after
the date of this  Agreement,  upon the request of any  Purchaser or the Company,
the Company and the  Purchaser  shall  execute  and  deliver  such  instruments,
documents  and other  writings as may be  reasonably  necessary  or desirable to
confirm and carry out and to  effectuate  fully the intent and  purposes of this
Agreement and the Preferred Shares.


<PAGE>
           IN WITNESS WHEREOF, the Company and the Purchaser have executed this
Agreement as of the day and year first above written.



                                          CORNERSTONE PROPERTIES INC.



                                       By:
                                      Name:
                                     Title:







                                     NEW YORK STATE TEACHERS' RETIREMENT
                                     SYSTEM




                                       By:
                                      Name:
                                     Title:


<PAGE>

                                 Schedule 2.01
                                      To
                      Preferred Stock Purchase Agreement
      dated as of November 22, 1996 between Cornerstone Properties Inc.,
              and the New York State Teachers' Retirement System.



                              Number of Preferred
Purchaser                     Shares To Be Purchased  Aggregate Purchase Price

New York State Teachers'
     Retirement System              689,655                $100,000,000


<PAGE>
                               Schedule 4.01(p)
                                      To
                      Preferred Stock Purchase Agreement
      dated as of November 22, 1996 between Cornerstone Properties Inc.,
              and the New York State Teachers' Retirement System.

                            Cornerstone Properties
                    Leases Greater Than 50,000 Square Feet


============================---------------------------------------============
         Building                   Tenant Name          Sq. Ft.   Expiration
============================---------------------------------------============
Norwest Center              Norwest Corporation            451,079        2018
                            Faegre & Benson                195,918        1998
                            KPMG Peat Marwick               75,152        2009
                            Merchant, Gould, et al.         55,895        2000
============================---------------------------------------============
One Norwest Center          Norwest Bank Denver N.A.       582,766        2013
                            Newmont Gold Company           166,659        1999
                            Apache Corporation             160,455        1997
============================---------------------------------------============
Washington Mutual Tower     Perkins Coie                   182,152        2004
                            Washington Mutual Savings      151,519        2007
                            Bank                            50,574        2004
                            Karr Tuttle Campbell
============================---------------------------------------============
125 Summer Street           Deloitte & Touche              120,624        1999
                            Bank of Tokyo Financial         94,211        2002
                            Corp.                           85,169        2000
                            Burns & Levinson
============================---------------------------------------============
One Lincoln Centre          Superior Bank                   56,645        2002
===============================================================================

===============================================================================


<PAGE>


                                   EXHIBIT A


                          [Stockholders' Agreement]






<PAGE>



                                PREFERRED STOCK
                              PURCHASE AGREEMENT



                                    between



                          CORNERSTONE PROPERTIES INC.

                                      and

                  NEW YORK STATE TEACHERS' RETIREMENT SYSTEM





                         Dated as of November 22, 1996







<PAGE>

                               TABLE OF CONTENTS


                                                                            Page


ARTICLE I.  DEFINITIONS....................................................  1
      Section 1.01.  Definitions...........................................  1

ARTICLE II.  THE SALE AND PURCHASE OF PREFERRED SHARES.....................  4
      Section 2.01.  Obligations to Sell and Purchase the Preferred
            Shares.........................................................  4
      Section 2.02.  The Closing...........................................  4
      Section 2.03.  Further Action........................................  4

ARTICLE III.  CONDITIONS...................................................  4
      Section 3.01.  Conditions to the Obligations of the Purchaser........  5
      Section 3.02.  Conditions to the Obligations of the Company..........  6

ARTICLE IV.  REPRESENTATIONS AND WARRANTIES................................  7
      Section 4.01.  Representations and Warranties of the Company.........  7
      Section 4.02.  Representations and Warranties of the Purchaser....... 12

ARTICLE V.  MISCELLANEOUS.................................................. 13
      Section 5.01.  Expenses.............................................. 13
      Section 5.02.  Assignment............................................ 13
      Section 5.03.  Benefit; Successors and Assigns....................... 13
      Section 5.04.  Notices............................................... 13
      Section 5.05.  Governing Law......................................... 14
      Section 5.06.  Entire Agreement...................................... 14
      Section 5.07.  Counterparts.......................................... 14
      Section 5.08.  Amendments............................................ 14
      Section 5.09.  Severability.......................................... 14
      Section 5.10.  Titles and Subtitles.................................. 15
      Section 5.11.  Further Assurances.................................... 15


Schedule 2.01       Purchaser Schedule
Schedule 4.01(p)    Schedule of Real Property Leases
EXHIBIT A   Stockholders' Agreement, dated as of November 22, 1996, between
              the Company and the Purchaser



EXHIBIT 4.1

                          CERTIFICATE OF DESIGNATIONS
                      OF THE VOTING POWERS, DESIGNATION,
                   PREFERENCES AND RELATIVE, PARTICIPATING,
             OPTIONAL OR OTHER SPECIAL RIGHTS AND QUALIFICATIONS,
                      LIMITATIONS AND RESTRICTIONS OF THE
                   8% CUMULATIVE CONVERTIBLE PREFERRED STOCK


            The undersigned hereby certify that they are the duly elected and
acting Executive Vice President and Secretary of CORNERSTONE PROPERTIES INC.,
a Nevada corporation (the "Corporation"), and pursuant to Nev. Rev. Stat. ss.
78.1955, DO HEREBY CERTIFY:

            That, pursuant to authority conferred upon the Board of Directors of
the  Corporation  by  ARTICLE  4  of  the  Amended  and  Restated   Articles  of
Incorporation (the "Articles") and conferred upon the  Administrative  Committee
by the  Board  of  Directors,  the  Administrative  Committee  of the  Board  of
Directors  of the  Corporation  adopted  on  November  21,  1996  the  following
resolution  creating a series of Preferred  Stock  designated  as 8%  Cumulative
Convertible Preferred Stock:

            RESOLVED,  that  pursuant to the authority  expressly  vested in the
Board  of  Directors  in  accordance  with the  provisions  of its  Articles  of
Incorporation,  a series of  Preferred  Stock of the  Corporation,  without  par
value,  be and it hereby is, created and that the designation and amount thereof
and the voting powers,  preferences,  and relative  rights of the shares of such
series, and the limitations and restrictions thereof, are as follows:

            1. Designation and Amount;  Fractional  Shares.  The designation for
such series of the Preferred Stock authorized by this resolution shall be the 8%
Cumulative  Convertible  Preferred Stock, without par value, with a stated value
of $145.00 per share (the "8% Preferred  Stock").  The stated value per share of
8% Preferred Stock shall not for any purpose be considered to be a determination
by the Board of  Directors  with  respect  to the  capital  and  surplus  of the
Corporation.  The  maximum  number  of  shares of 8%  Preferred  Stock  shall be
1,034,483. The 8% Preferred Stock is issuable in whole shares only.

            2.  Dividends.  Holders  of shares  of 8%  Preferred  Stock  will be
entitled to receive,  when,  as and if declared by the Board of Directors out of
assets of the Corporation legally available for payment,  cash dividends payable
quarterly at the rate of 8% per annum.  Dividends on the 8% Preferred Stock will
be payable  quarterly  on March 31, June 30,  September  30 and December 31 (the
"dividend payment dates"). Dividends on shares of the 8% Preferred Stock will be
cumulative on a daily basis from the date of initial  issuance of such shares of
8% Preferred Stock.  Dividends will be payable, in arrears, to holders of record
as they appear on the stock books of the  Corporation on such record dates,  not
more than 60 days nor less than 10 days preceding the payment dates thereof,  as
shall be fixed by the Board of  Directors.  The amount of dividends  payable for
each full  dividend  period  shall be computed by dividing  the annual  dividend
payment by four. The amount of dividends payable for the initial dividend period
or any period shorter or longer than a full dividend  period shall be calculated
on the basis of a 360-day year of twelve  30-day  months.  No  dividends  may be
declared  or paid or set apart for  payment  on any Parity  Preferred  Stock (as
defined in paragraph 11(b) below) with regard to the payment of dividends unless
there shall also be or have been  declared  and paid or set apart for payment on
the 8% Preferred  Stock,  like dividends for all dividend payment periods of the
8% Preferred Stock ending on or before the dividend  payment date of such Parity
Preferred  Stock,  ratably in proportion to the respective  amounts of dividends
(x) accumulated and unpaid or payable on such Parity Preferred Stock, on the one
hand,  and (y)  accumulated  and unpaid  through the dividend  payment period or
periods of the 8% Preferred Stock next preceding such dividend  payment date, on
the other hand.

            Except  as  set  forth  in  the  preceding  sentence,   unless  full
cumulative  dividends  on the 8%  Preferred  Stock have been paid,  no dividends
(other than in Common Stock of the  Corporation) may be paid or declared and set
aside for  payment or other  distribution  made upon the Common  Stock or on any
other  stock of the  Corporation  ranking  junior to or on a parity  with the 8%
Preferred Stock as to dividends,  nor may any Common Stock or any other stock of
the Corporation  ranking junior to or on a parity with the 8% Preferred Stock as
to dividends be redeemed,  purchased or otherwise acquired for any consideration
(or any payment be made to or available for a sinking fund for the redemption of
any  shares  of such  stock;  provided,  however,  that any  moneys  theretofore
deposited  in any  sinking  fund  with  respect  to any  Preferred  Stock of the
Corporation  in  compliance  with  the  provisions  of  such  sinking  fund  may
thereafter be applied to the purchase or redemption of such  Preferred  Stock in
accordance  with the terms of such sinking  fund,  regardless  of whether at the
time of  such  application  full  cumulative  dividends  upon  shares  of the 8%
Preferred  Stock  outstanding to the last dividend  payment date shall have been
paid or declared and set apart for payment) by the  Corporation;  provided  that
any such  junior  stock or Parity  Preferred  Stock or the  Common  Stock may be
converted into or exchanged for stock of the  Corporation  ranking junior to the
8% Preferred Stock as to dividends, and, provided, further, that any such junior
stock or Parity  Preferred  Stock or the Common  Stock may be  purchased  by the
Corporation  pursuant to Article 8 of the Restated  Articles of Incorporation to
preserve the Corporation's status as a real estate investment trust.

            3.  Liquidation  Preference.  The shares of 8% Preferred Stock shall
rank, as to liquidation,  dissolution or winding up of the Corporation, prior to
the  shares of Common  Stock  and any  other  class of stock of the  Corporation
ranking  junior  to  the 8%  Preferred  Stock  as to  rights  upon  liquidation,
dissolution  or  winding  up of the  Corporation,  so that in the  event  of any
liquidation,  dissolution or winding up of the Corporation, whether voluntary or
involuntary,  the holders of the 8% Preferred Stock shall be entitled to receive
out  of  the  assets  of  the  Corporation  available  for  distribution  to its
stockholders, whether from capital, surplus or earnings, before any distribution
is made to holders of shares of Common Stock or any other such junior stock,  an
amount equal to $145.00 per share (the "Liquidation Preference" of a share of 8%
of Preferred Stock) plus an amount equal to all dividends (whether or not earned
or declared)  accrued and  accumulated  and unpaid on the shares of 8% Preferred
Stock to the date of final  distribution.  The holders of the 8% Preferred Stock
will not be entitled to receive the Liquidation Preference until the liquidation
preference of any other class of stock of the Corporation  ranking senior to the
8%  Preferred  Stock as to rights upon  liquidation,  dissolution  or winding up
shall have been paid (or a sum set aside  therefor  sufficient  to  provide  for
payment) in full. After payment of the full amount of the Liquidation Preference
and such  dividends,  the  holders of shares of 8%  Preferred  Stock will not be
entitled  to any  further  participation  in any  distribution  of assets by the
Corporation.  If,  upon  any  liquidation,  dissolution  or  winding  up of  the
Corporation,  the assets of the Corporation, or proceeds thereof,  distributable
among the holders of shares of Parity  Preferred  Stock shall be insufficient to
pay in full the preferential amount aforesaid, then such assets, or the proceeds
thereof,  shall be  distributable  among such holders ratably in accordance with
the  respective  amounts  which  would be payable on such  shares if all amounts
payable  thereon  were  paid  in  full.  For  the  purposes  hereof,  neither  a
consolidation or merger of the Corporation with or into another corporation, nor
a merger of any other  corporation with or into the  Corporation,  nor a sale or
transfer of all or any part of the  Corporation's  assets for cash or securities
shall be considered a liquidation, dissolution or winding up of the Corporation.

            4.    Conversion.

      I. The holders of shares of 8%  Preferred  Stock shall have the right,  at
their  option,  to convert  shares of 8%  Preferred  Stock into shares of Common
Stock at any time, on and subject to the following terms and conditions:

            (a) The shares of 8%  Preferred  Stock shall be  convertible  at the
      office of any transfer agent for the 8% Preferred Stock, and at such other
      office or offices,  if any, as the Board of Directors may designate,  into
      fully paid and nonassessable  shares  (calculated as to each conversion to
      the nearest 1/100th of a share) of Common Stock, at the conversion  price,
      determined as hereinafter  provided,  in effect at the time of conversion,
      each share of 8% Preferred Stock being taken at $145.00 for the purpose of
      such  conversion.  The  price at which  shares of  Common  Stock  shall be
      delivered  upon  conversion  (the  "conversion  price") shall be initially
      $14.50 per share of Common Stock.  The conversion  price shall be adjusted
      as provided in paragraph (d) below.

            (b) In order to convert shares of the 8% Preferred Stock into Common
      Stock,  the holder  thereof  shall  surrender  at any  office  hereinabove
      mentioned the certificate or certificates  therefor,  duly endorsed to the
      Corporation  or in blank,  and give written  notice to the  Corporation at
      said office that such holder elects to convert such shares.  No payment or
      adjustment  shall be made upon any  conversion on account of any dividends
      accrued on the shares of 8% Preferred Stock  surrendered for conversion or
      on  account  of any  dividends  on  the  Common  Stock  issued  upon  such
      conversion.  Shares of the 8% Preferred Stock shall be deemed to have been
      converted  immediately  prior  to the  close  of  business  on the  day of
      surrender of such shares for  conversion in accordance  with the foregoing
      provisions (the "conversion  date"), and the person or persons entitled to
      receive the Common Stock  issuable upon such  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
      Corporation  shall issue and shall deliver at said office a certificate or
      certificates  for the number of full shares of Common Stock  issuable upon
      such conversion, together with a cash payment in lieu of any fraction of a
      share,  as  hereinafter  provided,  to the person or persons  entitled  to
      receive the same.

            (c) No  fractional  shares of  Common  Stock  shall be  issued  upon
      conversion of shares of 8% Preferred  Stock,  but, in lieu of any fraction
      of a share of Common Stock which would otherwise be issuable in respect of
      the  aggregate  number of shares of 8%  Preferred  Stock  surrendered  for
      conversion at one time by the same holder,  the  Corporation  shall pay in
      cash as an  adjustment  of such  fraction  an  amount  equal  to the  same
      fraction of the Closing Price (as defined below) on the date on which such
      shares of the 8% Preferred Stock were duly surrendered for conversion, or,
      if such date is not a Trading Date (as defined below), on the next Trading
      Date.

            (d)   The conversion price shall be adjusted from time to time as
      follows:

                  (1) In case the Corporation  shall (i) pay a dividend (or make
            a distribution) on its outstanding  shares of Common Stock in Common
            Stock,  (ii)  subdivide  or split its  outstanding  shares of Common
            Stock  into  a  larger  number  of  shares  by  reclassification  or
            otherwise, (iii) combine its outstanding shares of Common Stock into
            a smaller number of shares by reclassification or otherwise, or (iv)
            issue any shares of Common Stock by reclassification, the conversion
            price in effect at the time of the record date for such  dividend or
            distribution   or  other   effective   date  of  such   subdivision,
            combination or reclassification shall be adjusted so that the holder
            of any shares of 8% Preferred Stock surrendered for conversion after
            such time  shall be  entitled  to  receive  the  number of shares of
            Common  Stock which he would have owned or been  entitled to receive
            had such shares of the 8% Preferred Stock been converted immediately
            prior to such time.

                  (2) In case the Corporation  shall issue rights or warrants 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 clause (4)
            below) on the record  date for the  distribution  of such  rights or
            warrants,  the conversion price in effect at the opening of business
            on such  record  date shall be adjusted so that the same shall equal
            the price  determined by multiplying  the  conversion  price then in
            effect by a fraction,  of which the numerator shall be the number of
            shares of Common Stock then outstanding plus the number of shares of
            Common Stock which the aggregate  exercise price of such warrants or
            rights  exercised would purchase at such current market price and of
            which the denominator  shall be the number of shares of Common Stock
            then  outstanding  plus the  number of  additional  shares of Common
            Stock  issued  upon the  exercise of such  warrants or rights.  Such
            adjustment  shall become effective at the opening of business on the
            business  day  next  following  the  computation   thereof.  If  the
            conversion price shall be adjusted at any time under or by reason of
            provisions  in this clause  (2),  then,  in case of the  delivery of
            Common  Stock upon the  exercise  of any such  right or warrant  the
            conversion  price  then  in  effect  hereunder  shall  forthwith  be
            adjusted to such  respective  amount as would have been obtained had
            such right or warrant  never been issued as to such Common Stock and
            had adjustments  been made upon the issuance of the shares of Common
            Stock delivered as aforesaid.

                  (3) In case the Corporation shall distribute to all holders of
            its Common Stock evidences of its indebtedness or assets  (excluding
            any cash or stock dividends or distributions and dividends  referred
            to in clause (1) above) or rights or  warrants to  subscribe  for or
            purchase  securities of the  Corporation or any of its  subsidiaries
            (other than shares of Common Stock referred to in clause (2) above),
            then in each such case 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 date of such
            distribution  by a  fraction  of which  the  numerator  shall be the
            current market price per share (determined as provided in clause (4)
            below) of the Common Stock on the record date  mentioned  below less
            the then fair market value (as determined by the Board of Directors,
            whose  determination  shall be  conclusive)  of the  portion  of the
            assets  or  evidences  of  indebtedness  or rights  or  warrants  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 shall become effective on the opening
            of business on the business day next  following  the record date for
            the   determination   of  stockholders   entitled  to  receive  such
            distribution.

                  (4) For the purpose of any computation  under clause (1), (2),
            or (3) above,  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 30 consecutive Trading Dates commencing not more than
            45 Trading  Dates  before the day in question,  such 30  consecutive
            Trading Date period to be specified by the Board of Directors  prior
            to the  commencement of 45 Trading Dates before the day in question,
            or in the event  the Board of  Directors  fails to  specify  such 30
            consecutive  Trading Dates, such 30 consecutive  Trading Dates shall
            be deemed to have  commenced on the 40th Trading Date before the day
            in question.

                  (5) No adjustment  in the  conversion  price  pursuant to this
            paragraph  4 shall be  required  unless  (i) such  adjustment  would
            require  an  increase  or  decrease  of at least  1% in such  price;
            provided  that any  adjustment  which by  reason  of this  paragraph
            (d)(5) is not required to be made shall be carried forward and taken
            into account in any subsequent  adjustment and will be made not more
            than three  years after the time it would have been made but for the
            provisions of this paragraph  (d)(5);  provided further that, at the
            time  of  any  adjustment,   such   adjustment   shall  include  all
            adjustments  to the date thereof  then being  carried  forward.  All
            calculations  under this  paragraph  4 shall be made to the  nearest
            1/100th of a cent or to the nearest  1/100th of a share, as the case
            may be.

            (e) In case of any  consolidation  or merger of the Corporation with
      or into another  corporation  or in the case of any sale or  conveyance to
      another   corporation  (other  than  a  wholly-owned   subsidiary  of  the
      Corporation) of all or substantially all of the property and assets of the
      Corporation,  the holder of a share of the 8%  Preferred  Stock shall have
      the right  thereafter  to  convert  such share into the kind and amount of
      shares of stock and other  securities and properties  receivable upon such
      consolidation,  merger,  sale or  conveyance  by a holder of the number of
      shares of Common Stock into which such share of 8%  Preferred  Stock might
      have been converted immediately prior to such consolidation,  merger, sale
      or  conveyance  and shall have no other  conversion  rights with regard to
      such share of 8% Preferred  Stock.  In the event of such a  consolidation,
      merger,  sale or  conveyance,  effective  provision  shall  be made in the
      certificate of incorporation of the resulting or surviving  corporation or
      otherwise for the protection of the conversion rights of the shares of the
      8% Preferred Stock, which shall be applicable, as nearly as reasonably may
      be, to any such other  shares of stock and other  securities  and property
      deliverable  upon conversion of shares of the 8% Preferred  Stock. In case
      securities  or  properties  other than  Common  Stock shall be issuable or
      deliverable  upon  conversion  as aforesaid,  then all  references in this
      paragraph 4 shall be deemed to apply,  so far as appropriate and as nearly
      as may be, to such other securities or properties.

            (f)   Whenever the conversion price is adjusted as herein
      provided:

                  (1) the  Corporation  shall  compute the  adjusted  conversion
            price in  accordance  with  this  paragraph  4 and  shall  prepare a
            certificate  signed by the  President or one of the Vice  Presidents
            and  the  Treasurer  or  one  of  the  Assistant  Treasurers  of the
            Corporation  setting forth the adjusted  conversion  price, and such
            certificate  shall  forthwith  be filed with the  transfer  agent or
            agents for the 8% Preferred Stock; and

                  (2) a  notice  stating  that  the  conversion  price  has been
            adjusted and setting forth the adjusted  conversion  price shall, as
            soon as  practicable,  be  mailed  to the  holders  of record of the
            outstanding shares of 8% Preferred Stock.

            (g)   In case at any time:

                  (1) the  Corporation  shall  declare a dividend  (or any other
            distribution) on its Common Stock payable otherwise than in cash out
            of profits or surplus; or

                  (2)  the  Corporation  shall  authorize  the  granting  to the
            holders of its Common Stock of rights to  subscribe  for or purchase
            any shares of  capital  stock of any class or series or of any other
            rights; or

                  (3)  of  any  reclassification  of the  capital  stock  of the
            Corporation   (other  than  a  subdivision  or  combination  of  its
            outstanding  shares of Common  Stock),  or of any  consolidation  or
            merger to which the Corporation is a party and for which approval of
            any  stockholders of the Corporation is required,  or of the sale or
            transfer of all or  substantially  all of the property and assets of
            the  Corporation,  or of the voluntary or  involuntary  dissolution,
            liquidation or winding up of the Corporation;

      then the  Corporation  shall cause to be mailed to the  transfer  agent or
      agents  for the 8%  Preferred  Stock and to the  holders  of record of the
      outstanding  shares of 8% Preferred  Stock at least 20 days (or 10 days in
      any case  specified  in clause (1) or (2) above)  prior to the  applicable
      record date hereinafter  specified, a notice stating (x) the date on which
      a record is to be taken for the purpose of such dividend,  distribution or
      rights,  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 or rights 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 or other
      property deliverable upon such  reclassification,  consolidation,  merger,
      sale, transfer, dissolution, liquidation or winding up.

            (h) The  Corporation  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 the shares of the 8%
      Preferred   Stock,  the  full  number  of  shares  of  Common  Stock  then
      deliverable  upon the conversion of all shares of 8% Preferred  Stock then
      outstanding.

            (i) The Corporation  will pay any and all transfer taxes that may be
      payable in respect of the  issuance or delivery of shares of Common  Stock
      on  conversion  of shares  of 8%  Preferred  Stock  pursuant  hereto.  The
      Corporation  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 in which the shares of 8%
      Preferred  Stock  so  converted  were  registered,  and no such  issue  or
      delivery shall be made unless and until the person  requesting  such issue
      has  paid  to  the  Corporation  the  amount  of  any  such  tax,  or  has
      established,  to the  satisfaction of the  Corporation,  that such tax has
      been paid.

            (j) For the purpose of this  paragraph  4, the term  "Common  Stock"
      shall  include  any  stock of any  class of the  Corporation  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
      Corporation,  and which is not subject to redemption  by the  Corporation.
      However, shares issuable on conversion of shares of the 8% Preferred Stock
      shall  include  only shares of Common Stock as such Common Stock exists on
      the date of this  Certificate or shares of any class or classes  resulting
      from any reclassification or  reclassifications  thereof and which have 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
      Corporation  and which are not subject to redemption  by the  Corporation,
      provided  that if at any time there shall be more than one such  resulting
      class,   the  shares  of  each  such  class  then  so  issuable  shall  be
      substantially  in the proportion  which the total number of shares of such
      class resulting from all such reclassifications  bears to the total number
      of shares of all such classes resulting from all such reclassifications.

            (k) As used in this paragraph 4, the term "Closing Price" on any day
      shall mean the  reported  last sales price on such day or, in case no such
      sale takes place on such day, the average of the reported  closing bid and
      asked  prices,  in each case on the New York  Stock  Exchange,  or, if the
      Common Stock is not listed or admitted to trading on such Exchange, on the
      Frankfurt  Stock  Exchange,  or,  if the  Common  Stock is not  listed  or
      admitted to trading on such Exchange, on the principal securities exchange
      on which the Common Stock is listed or admitted to trading on which prices
      are quoted in U.S.  dollars,  or, if not listed or  admitted to trading on
      any such  securities  exchange,  the  average of the closing bid and asked
      prices as furnished in U.S.  dollars by any  broker/dealer  selected  from
      time to time by the  Board of  Directors  for that  purpose;  and the term
      "Trading Date" shall mean a date on which the New York Stock Exchange, the
      Frankfurt Stock Exchange or other  applicable  securities  market used for
      determining the Closing Price is open for the transaction of business.  To
      the extent  required,  a Closing Price shall be converted to U.S.  dollars
      from  deutsche  marks or to deutsche  marks from U.S.  dollars at the noon
      buying rate in New York City for cable transfers in foreign  currencies as
      certified for customs purposes by the Federal Reserve Bank of New York for
      the date in question.

      II. The Corporation  shall have the right,  at its option,  to convert all
shares of 8% Preferred Stock then  outstanding  into shares of Common Stock upon
the consummation  (the "Qualified Public Offering Closing Date") of a "Qualified
Public  Offering"  (as defined in paragraph  5(e) below),  on and subject to the
same terms and conditions as apply to  conversions of the 8% Preferred  Stock at
the option of the holders  thereof  pursuant to subparagraph I of this paragraph
4, except that the following  provisions  shall be applicable to a conversion by
the Corporation pursuant to this subparagraph II:

            (a) Such  conversion  shall  be at the  conversion  price in  effect
      immediately  prior  to the  close  of  business  on the  Qualified  Public
      Offering Closing Date.

            (b) Unless  the  Corporation  gives  notice to the  contrary  to the
      transfer  agent or  agents  for the 8%  Preferred  Stock  at  least  three
      business days prior to the Qualified Public Offering Closing Date, it will
      be  deemed  to have  elected  to  convert  all  outstanding  shares  of 8%
      Preferred  Stock  immediately  prior  to  the  close  of  business  on the
      Qualified Public Offering Closing Date.

            (c) Whenever the 8%  Preferred  Stock is converted  pursuant to this
      subparagraph II, a notice to that effect shall, as soon as practicable, be
      mailed to the holders of record of the outstanding  shares of 8% Preferred
      Stock.  In order to receive a certificate or  certificates  for the Common
      Stock  issuable upon such  conversion  and any cash payment in lieu of any
      fraction of a share,  the holders of 8% Preferred Stock shall surrender at
      the office of any transfer  agent for the 8% Preferred  Stock,  or at such
      other office or offices,  if any, as the Board of Directors may designate,
      the certificate or certificates for the 8% Preferred Stock,  duly endorsed
      to the  Corporation  or in blank.  No payment or adjustment  shall be made
      upon any conversion pursuant hereto on account of any dividends accrued on
      the  shares of 8%  Preferred  Stock  converted  by the  Corporation  or on
      account of any dividends on the Common Stock issued upon such conversion.

            (d)  Except  as  superseded  by the  foregoing,  the  provisions  of
      subparagraph I of this paragraph 4 shall apply,  so far as appropriate and
      as nearly as may be, to this subparagraph II.

            5.    Voting Rights.  The holders of shares of 8% Preferred Stock
shall have no voting rights whatsoever, except for any voting rights to which
they may be entitled under the laws of the State of Nevada, and except as
follows:

            (a) The holders of shares of 8% Preferred Stock (voting  together as
      a class)  shall be entitled to elect one member of the Board of  Directors
      of the Corporation.

            (b) At any  time an  Approved  Purchaser  shall be  designated,  the
      holders of shares of 8%  Preferred  Stock  (voting  together  as a class),
      shall be entitled to elect one additional member of the Board of Directors
      of the  Corporation.  Upon any failure of the  Approved  Purchaser to hold
      shares of 8% Preferred Stock with an aggregate stated value equal to or in
      excess of the  Required  Amount,  the right of the holders of shares of 8%
      Preferred  Stock to  elect a  member  of the  Board  of  Directors  of the
      Corporation   under  this  paragraph  5(b)  shall  terminate  without  the
      possibility of revesting.  "Approved Purchaser" means any one holder of 8%
      Preferred Stock other than the New York State Teachers'  Retirement System
      (or its nominee)  which holds shares of 8% Preferred  Stock with aggregate
      stated  value equal to or in excess of  $50,000,000  or such other  lesser
      amount  designated  by  the  Administrative  Committee  of  the  Board  of
      Directors  of  the  Corporation  (the  "Required  Amount")  and  which  is
      designated  by the New York  State  Teachers'  Retirement  System  (in its
      reasonable  judgment) in writing at the time such  purchaser  acquires its
      shares of 8% Preferred Stock equal to or in excess of the Required Amount.
      Any such  Approved  Purchaser  shall  cease to be the  Approved  Purchaser
      immediately  upon any  failure to hold shares of 8%  Preferred  Stock with
      aggregate stated value equal to or in excess of the Required Amount.

            (c) If a  Triggering  Event (as  defined  below)  shall occur and be
      continuing the holders of shares of 8% Preferred Stock (voting together as
      a class)  shall have the right to elect  members of the Board of Directors
      (additional  to those  elected  pursuant  to  paragraphs  5(a) and 5(b) as
      follows  until  such  rights  shall   terminate  in  accordance  with  the
      provisions of this paragraph 5 or in accordance with applicable  laws: (A)
      at any time an Approved Purchaser shall be designated,  two members of the
      Board of Directors; and (B) at all other times, one member of the Board of
      Directors.  The total number of additional  directors  elected pursuant to
      this  paragraph  5(c) shall not exceed the foregoing  numbers if more than
      one Triggering Event shall have occurred and be continuing.  A "Triggering
      Event"  means:  (i) the  failure of the  Corporation  to have  completed a
      Qualified  Public  Offering on or prior to  December  31,  1999,  (ii) the
      existence,  at any  time  or  times,  of  dividends  on the  shares  of 8%
      Preferred Stock in arrears for two consecutive  calendar  quarters or more
      or (iii) the  Incurrence by the  Corporation  of any Debt if, after giving
      effect to such Incurrence,  the Debt (as both terms are defined in Exhibit
      B hereto) of the  Corporation  exceeds 60% of the  appraised  value of the
      assets of the Corporation; (provided, that, notwithstanding the foregoing,
      the  Corporation  may at any time Incur  Debt in an amount  which does not
      exceed  the  principal  amount  of  outstanding  Debt  of the  Corporation
      extended,  refinanced, renewed or replaced with the proceeds thereof, plus
      any  costs  associated  with  the  extension,   refinancing,   renewal  or
      replacement and such Incurrence shall not constitute a Triggering Event).


<PAGE>

            (d) Any right to elect a director  which  arises  because  dividends
      payable on the shares of 8%  Preferred  Stock have been in arrears for two
      consecutive calendar quarters or more shall continue until such arrearages
      have been paid or set apart for  payment,  at which time such right  shall
      terminate,  except as  herein or by law  expressly  provided,  subject  to
      revesting  in the  event  of each  and  every  subsequent  default  of the
      character  above  mentioned.  Any right to elect a director  which  arises
      because of a violation  of the Debt to total  assets  test shall  continue
      until the Corporation again comes into compliance with such test, at which
      time such  right  shall  terminate,  except as herein or by law  expressly
      provided,  subject to revesting in the event of each and every  subsequent
      default of the character above mentioned.

            (e) A "Qualified Public Offering" shall mean an underwritten  public
      offering  of Common  Stock to be listed on the New York Stock  Exchange in
      which (i) the aggregate net proceeds to the Corporation  (after payment of
      all fees and expenses of the  offering and pay-down of any then  remaining
      debt under the Term Loan  Agreement,  dated as of August 8, 1995,  between
      the  Corporation  and  Deutsche  Bank AG (London))  together  with the net
      proceeds of any prior  public  offerings of Common Stock listed on the New
      York Stock  Exchange  equal or exceed  US$200  million,  (ii) the expected
      distributions  on  shares of Common  Stock of the  Corporation  for the 12
      months  following  the  Qualified  Public  Offering  (as  certified by the
      treasurer or chief financial  officer of the  Corporation)  divided by the
      public  offering price is less than or equal to 7.75% and (iii) (A) if the
      Qualified  Public  Offering is completed in calendar year 1997, the public
      offering price is at least $16.00 per share,  (B) if the Qualified  Public
      Offering is completed in calendar year 1998, the public  offering price is
      at least  $16.50 per share and (C) if the  Qualified  Public  Offering  is
      completed in calendar  year 1999,  the public  offering  price is at least
      $17.00 per share;  provided,  however,  that a Qualified  Public  Offering
      shall be deemed to occur on the first  business day  following any day the
      condition set forth in item (i) above and each of the following conditions
      is satisfied:  (x) the day is prior to January 1, 2000, (y) the average of
      the closing  prices for shares of Common Stock as reported on the New York
      Stock Exchange composite tape for the 20 consecutive


<PAGE>


      trading days  immediately  preceding  such day (the  "Composite  Average")
      equals or exceeds the applicable minimum price for a public offering to be
      considered a Qualified  Public  Offering at such time and (z) the expected
      distributions  on shares of Common Stock for the 12 months  following such
      day (as  certified  by the  treasurer  or chief  financial  officer of the
      Corporation)  divided  by the  Composite  Average is less than or equal to
      7.75%.

            (f) The term of office of any  director  then in office  elected  by
      holders  of  shares  of 8%  Preferred  Stock  due  to the  failure  of the
      Corporation to complete a Qualified  Public Offering prior to December 31,
      1999 or  because of a  violation  of the Debt to total  assets  test shall
      terminate  upon the  completion  of a  Qualified  Public  Offering  by the
      Corporation.  The term of office of any director then in office elected by
      the holders of shares of 8% Preferred Stock because  dividends  payable on
      the shares of 8% Preferred  Stock have been in arrears for two consecutive
      calendar  quarters  or  more  shall  terminate  18  months  following  any
      termination of the right of the holders of shares of 8% Preferred Stock as
      a class to vote for  directors  as herein  provided.  Whenever the term of
      office of a director  elected by the holders of shares of the 8% Preferred
      Stock who are entitled to vote in such manner shall end, the number of the
      directors  of  the  Corporation  shall  be  reduced  correspondingly.  Any
      director who shall have been elected  pursuant to this  paragraph 5 may be
      removed at any time,  either  with or without  cause by a majority  of the
      holders of the  outstanding  shares of 8%  Preferred  Stock.  Any  vacancy
      thereby created may be filled only by the affirmative  vote of the holders
      of shares of 8% Preferred Stock voting separately as a class. At elections
      for such  directors,  each holder of shares of 8% Preferred Stock shall be
      entitled to one vote for each share held.

            (g) The  consent of the holders of at least a majority of the shares
      of 8% Preferred Stock outstanding at the time (voting as a class) given in
      person or by proxy,  either in  writing or at any  meeting  called for the
      purpose,  shall be necessary to permit, effect or validate any one or more
      of the following:

                  (i) the  amendment,  alteration or repeal,  whether by merger,
            consolidation or otherwise, of any of the provisions of the Restated
            Articles  of   Incorporation   (including  this  resolution  or  any
            provision  hereof) that would  materially  and adversely  affect any
            power,  preference  or special  right of the shares of 8%  Preferred
            Stock or of the holders  thereof;  provided,  that, the creation and
            issuance of other series of Common Stock or Preferred Stock, in each
            case ranking junior to the shares of 8% Preferred Stock with respect
            to the  payment of  dividends  and the  distribution  of assets upon
            liquidation,  dissolution  or  winding  up,  shall  not be deemed to
            materially and adversely affect such powers,  preferences or special
            rights;

                  (ii) the amendment,  alteration or repeal,  whether by merger,
            consolidation or otherwise, of any of the provisions of the Restated
            Articles of Incorporation  or Bylaws of the Corporation  which would
            have the effect of increasing  the size of the Board of Directors of
            the  Corporation to greater than nine members,  provided,  that, the
            Board of  Directors  may be  increased in order to allow one or more
            directors  elected by holders of 8%  Preferred  Stock or  Cumulative
            Convertible 8% Preferred Stock, Series A to be seated;

                  (iii) the amendment,  alteration or repeal, whether by merger,
            consolidation or otherwise, of any of the provisions of the Restated
            Articles  of   Incorporation   (including  this  resolution  or  any
            provision  hereof)  that would  increase  the  amount of  authorized
            Common Stock or authorized Preferred Stock;

                  (iv) the creation of any other class or series of stock of the
            Corporation  ranking  prior to or on a parity with the 8%  Preferred
            Stock (as those  terms are  defined  in  paragraph  11 hereof or the
            increase of the maximum number of shares of 8% Preferred Stock); or

                  (v) the  repurchase or other  acquisition  of shares of Common
            Stock or  Preferred  Stock,  other than  pursuant to  paragraph 7 or
            paragraph 9 hereof or in the ordinary course of business.

            (h) The foregoing voting  provisions shall not apply if, at or prior
      to the time when the act with  respect to which such vote would  otherwise
      be required  shall be  effected,  all  outstanding  shares of 8% Preferred
      Stock shall have been  redeemed or called for  redemption  and  sufficient
      funds shall have been deposited in trust to effect such redemption.

            6. Authorization and Issuance of Other Securities. No consent of the
holders of the 8% Preferred  Stock shall be required for (a) the creation of any
indebtedness of any kind of the  Corporation,  (b) the creation,  or increase or
decrease  in the  amount,  of any class or  series  of stock of the  Corporation
ranking junior as to dividends or upon liquidation, dissolution or winding up to
the 8% Preferred Stock or (c) any increase,  decrease or change in the par value
of the Common Stock or in any other terms thereof.

            7.  Redemption  at the Option of the  Corporation.  The shares of 8%
Preferred  Stock which have not previously been converted may be redeemed by the
Corporation as a whole in cash at the Redemption Price (as defined below) at any
time on or after the fifth  anniversary of the date of original  issuance of the
first  share of 8%  Preferred  Stock,  on the date  fixed  for  redemption  (the
"Redemption  Date").  The "Redemption Price" shall be $145 per share, plus a sum
equal to all dividends accrued and unpaid thereon to the Redemption Date, plus a
redemption premium (the "Redemption Premium") calculated to cause the holders of
the 8% Preferred  Stock to have  received an internal rate of return of 12%. The
method of calculating the Redemption Premium is set forth in Exhibit A hereto.

            8. Procedure for Redemption.  The  Corporation  shall cause a notice
(the "Redemption Notice") to be mailed, first-class postage prepaid, at least 30
days, but not more than 90 days, prior to the Redemption Date, to each holder of
record of shares of 8% Preferred Stock to be redeemed.  Such  Redemption  Notice
shall be mailed to such record  holders at their  respective  addresses  as they
appear  upon the books of the  Corporation  and  shall set forth the  Redemption
Date, the Redemption Price and the place or places for surrender of certificates
for shares to be redeemed.

            Any Redemption Notice which is mailed by the Corporation as provided
in this  paragraph  8 shall be  conclusively  presumed  to have been duly given,
whether or not the stockholder  receives such Redemption  Notice, and failure to
give such notice by mail,  or any defect in such  notice,  to the holders of any
shares of 8% Preferred  Stock shall not affect the  validity of the  proceedings
for the  redemption  of any  other  shares.  On or  after  the  Redemption  Date
specified  in such  Redemption  Notice,  each  holder of the  shares  called for
redemption  shall  surrender the  certificate or  certificates  evidencing  such
shares to the  Corporation  at the place  designated  in such  notice  and shall
thereupon be entitled to receive the  Redemption  Price.  If, on the  Redemption
Date, funds necessary for the redemption  shall be available  therefor and shall
have been irrevocably  deposited or set aside,  then,  notwithstanding  that the
certificates  evidencing  such shares of 8% Preferred  Stock shall not have been
surrendered,  the  dividends  with respect to the shares of 8%  Preferred  Stock
shall cease to accrue after the  Redemption  Date, the shares shall no longer be
deemed to be outstanding,  the holders thereof shall cease to be stockholders of
the  Corporation,  and all rights with  respect to such shares  shall  forthwith
terminate (except the right to receive the amount payable upon redemption of the
shares to be redeemed, without interest).

            9.  Change in  Control.  (a) Upon the  occurrence  of a  "Change  in
Control",  each holder of 8% Preferred Stock shall have the right to require the
redemption of its 8% Preferred Stock by the Corporation in cash, pursuant to the
offer  described  below (the "Change in Control Offer") at a price equal to 101%
of the stated  value per share  plus a sum equal to all  dividends  accrued  and
unpaid  thereon (if any) to the related  Change in Control  Redemption  Date.  A
"Change in Control" shall mean (i) a merger,  consolidation or reorganization of
the  Corporation,  if, after giving  effect  thereto,  the holders of the Common
Stock  prior to such  transaction  shall fail to own at least 51% of the capital
stock  entitled to vote for the election of directors in the  successor  entity,
(ii) the sale of a  majority  or more of the  assets of the  Corporation  in any
single transaction or in any series of related  transactions,  or (iii) a change
in the composition of the Board of Directors of the Corporation such that during
any period of two consecutive years the individuals who at the beginning of such
period  were  directors  of the  Corporation  shall  cease  for  any  reason  to
constitute a majority of the directors then in office (and not designated to the
Board by any holder of Preferred  Stock) unless the  individuals  replacing such
directors   were  elected  or  nominated  by  the  Board  of  Directors  of  the
Corporation.

            (b) Within 30 days of any Change in Control  the  Corporation  shall
mail a notice (the  "Change in Control  Notice") to each holder of record of the
8% Preferred Stock stating:

            (i) that a Change  in  Control  has  occurred,  that the  Change  in
      Control  Offer is being  made  pursuant  to the terms of the 8%  Preferred
      Stock and that all shares of 8% Preferred  Stock validly  tendered will be
      accepted for redemption;

            (ii) the redemption price and the date of redemption (which shall be
      a  business  day no  earlier  than 30 days nor later than 60 days from the
      date such notice is mailed) (the "Change in Control Redemption Date");

            (iii) that any shares of 8% Preferred Stock not tendered will
      continue to accumulate dividends;

            (iv) that,  unless the  Corporation  defaults  in the payment of the
      Change in  Control  redemption  price,  any shares of 8%  Preferred  Stock
      accepted  for  redemption  pursuant  to the Change in Control  Offer shall
      cease to accumulate dividends after the Change in Control Redemption Date;

            (v) that holders of 8% Preferred  Stock  electing to have any shares
      of 8% Preferred  Stock  redeemed  pursuant to the Change in Control  Offer
      will be required to surrender the certificates representing such shares of
      8% Preferred Stock to the transfer agent for the 8% Preferred Stock at the
      address specified in the notice prior to 1:00 P.M., New York City time, on
      the business day  immediately  preceding the Change in Control  Redemption
      Date; and

            (vi)  that  holders  whose  shares of 8%  Preferred  Stock are being
      redeemed only in part will be issued new certificates  representing shares
      of 8%  Preferred  Stock equal in number to the  unredeemed  portion of the
      shares of 8% Preferred Stock  surrendered;  provided that each certificate
      representing   shares  of  8%  Preferred   Stock  redeemed  and  each  new
      certificate  representing  shares of 8% Preferred Stock issued shall be in
      whole shares.

            (c)   On or before the Change in Control Redemption Date:

            (i) the transfer  agent for the 8% Preferred  Stock shall deliver to
      the Corporation a certificate specifying the aggregate number of shares of
      8% Preferred  Stock  delivered for purchase by the holders of 8% Preferred
      Stock prior to the Change in Control  Payment Date  pursuant to the Change
      in Control Offer;

            (ii) the  Corporation  shall  accept  for  redemption  shares  of 8%
      Preferred  Stock or portions  thereof  tendered  pursuant to the Change in
      Control Offer;

            (iii) the Corporation  shall deposit with the transfer agent for the
      8% Preferred Stock money  sufficient to pay the Change in Control price of
      all shares of 8% Preferred Stock or portions thereof so accepted; and

            (iv) the Corporation shall deliver, or cause to be delivered, to the
      transfer  agent  for  the 8%  Preferred  Stock  an  officers'  certificate
      specifying the shares of 8% Preferred Stock or portions  thereof  accepted
      for payment by the Corporation.

            (d) The  transfer  agent for the 8% Preferred  Stock shall  promptly
mail to the holders of 8% Preferred Stock so accepted payment in an amount equal
to the redemption price, and the transfer agent for the 8% Preferred Stock shall
promptly  authenticate  and mail to such  holders  of 8%  Preferred  Stock a new
certificate  representing  shares of 8%  Preferred  Stock equal in number to any
unredeemed shares of 8% Preferred Stock surrendered; provided that each share of
8% Preferred Stock redeemed and each new certificate  representing  shares of 8%
Preferred Stock issued shall be in whole shares. The Corporation will notify the
holders of 8% Preferred  Stock of the results of the Change in Control  Offer on
or as soon as practicable after the Change in Control Redemption Date.

            10.  Amendment of  Resolution.  The Board of Directors  reserves the
right  (subject  to the  provisions  of clause  5(g)(iv)  above)  by  subsequent
amendment  of this  resolution  from time to time to increase  or  decrease  the
number of shares  that  constitute  the 8%  Preferred  Stock  (but not below the
number of shares thereof then  outstanding)  and in other respects to amend this
resolution  within the  limitations  provided by law,  this  resolution  and the
Articles of Incorporation.

            11.   Rank.  (a)  For the purposes of this resolution, any stock of
any class or classes of the Corporation shall be deemed to rank:

            (i)  prior  to  shares  of  the 8%  Preferred  Stock,  either  as to
      dividends or upon liquidation,  dissolution or winding up, or both, if the
      holders of stock of such class or classes  shall be  entitled by the terms
      thereof to the  receipt of  dividends  or of  amounts  distributable  upon
      liquidation,  dissolution or winding up, as the case may be, in preference
      or priority to the holders of shares of the 8% Preferred Stock;

            (ii) on a parity with shares of the 8% Preferred Stock, either as to
      dividends or upon liquidation, dissolution or winding up, or both, whether
      or not the dividend payment dates, or redemption or liquidation prices per
      share thereof,  be different from those of the 8% Preferred  Stock, if the
      holders of stock of such class or classes  shall be  entitled by the terms
      thereof  to the  receipt  of  dividends  or of  amounts  distributed  upon
      liquidation,  dissolution or winding up, as the case may be, in proportion
      to  their  respective  dividend  rates  or  liquidation  prices,   without
      preference  or  priority  of one over the other as between  the holders of
      such  stock and the  holders  of shares of 8%  Preferred  Stock  (the term
      "Parity Preferred Stock" being used to refer to any stock on a parity with
      the  shares  of 8%  Preferred  Stock,  either  as  to  dividends  or  upon
      liquidation,  dissolution  or  winding  up, or both,  as the  context  may
      require); and

            (iii)  junior  to  shares of the 8%  Preferred  Stock,  either as to
      dividends or upon liquidation, dissolution or winding up, or both, if such
      class shall be Common  Stock or if the holders of the 8%  Preferred  Stock
      shall be entitled to the receipt of dividends or of amounts  distributable
      upon  liquidation,  dissolution  or  winding  up,  as the case may be,  in
      preference or priority to the holders of stock of such class or classes.

      (b) The 8%  Preferred  Stock  shall rank on a parity with all shares of 7%
Cumulative  Convertible  Preferred  Stock of the Corporation as to dividends and
upon liquidation and prior to all shares of 8% Cumulative  Convertible Preferred
Stock, Series A as to dividends and upon liquidation.


<PAGE>
      IN WITNESS WHEREOF, the Corporation has caused this Certificate to be duly
executed in its corporate name on this 21st day of November, 1996.


Sworn to me this                    CORNERSTONE PROPERTIES INC.
___ day of November, 1996
                                    By:    __________________________
______________________                    Name:
Notary Public                             Title:

                                    By:    __________________________
Sworn to me this                          Name:
___ day of November, 1996                 Title:

- ----------------------
Notary Public


<PAGE>
                                     EXHIBIT A


           Calculation of Internal Rate of Return and Redemption Premium

For  purposes of  paragraph  7, the  Redemption  Premium (if any) shall equal an
amount such that (i) the sum of the accreted values  (determined as of such time
by using an annual  interest rate of 12%  compounded  quarterly from the date on
which the related distribution was made) of all distributions by the Corporation
to the holder(s) of 8% Preferred Stock as of such date (including the Redemption
Premium,  if any), equals (ii) the sum of the accreted values  (determined as of
such time by using an annual interest rate of 12% compounded  quarterly from the
date on which the related  purchase  was made) of all  purchases of 8% Preferred
Stock  made  by  the  holder(s)  of 8%  Preferred  Stock.  For  the  purpose  of
calculating  the accreted  value of  distributions  or purchases of 8% Preferred
Stock made other than on the first day of a month,  interest shall be calculated
on the basis of a 30-day month and a 360-day year.  The interest rate applied on
a  quarterly   basis  for  purposes  of   calculating   the  accreted  value  of
distributions or purchases of 8% Preferred Stock shall be 2.873%.


<PAGE>

                                     EXHIBIT B

                                    Definitions

For purposes of paragraph  5(c),  the  following  terms shall have the following
respective meanings:

            "Capitalized Lease" means, as applied to the Corporation,  any lease
      of property (whether real, personal or mixed) the discounted present value
      of the rental  obligations of the  Corporation  as lessee under which,  in
      conformity  with GAAP, is required to be or is  capitalized on the balance
      sheet of that person.

            "Currency  Agreement" means any foreign exchange contract,  currency
      swap  agreement  or other  similar  agreement or  arrangement  designed to
      protect the Parent against fluctuations in currency values.

            "Debt" of the Corporation means, at any date (without  duplication):
      (i) all  obligations  of the  Corporation  for  borrowed  money;  (ii) all
      obligations of the Corporation  evidenced by bonds,  debentures,  notes or
      other similar  instruments;  (iii) all  obligations of the  Corporation in
      respect  of  letters  of credit,  bankers'  acceptances  or other  similar
      instruments (or reimbursement  obligations with respect thereto); (iv) all
      obligations  of the  Corporation  to pay the  deferred  purchase  price of
      property or services  (but  excluding  trade  accounts  payable or accrued
      liabilities  arising  in the  ordinary  course of  business  which are not
      overdue);   (v)  all  obligations  of  the  Corporation  as  lessee  under
      Capitalized  Leases; (vi) all obligations of the Corporation in respect of
      performance bonds or other similar  instruments;  (vii) all obligations of
      others of the types  referred to in clauses (i) through  (vi),  (viii) and
      (ix) of this paragraph  secured by a Lien on any asset of the Corporation,
      whether or not any such obligation is assumed by the Corporation, provided
      that,  for  purposes  of  determining  the  amount of any Debt of the type
      described in this clause  (vii),  if recourse with respect to such Debt is
      limited  to such  asset,  the  amount of such Debt shall be limited to the
      fair market value of such assets;  (viii) all obligations of others of the
      types  referred to in clauses (i) through (vi) and (ix) of this  paragraph
      which  are  guaranteed  by the  Corporation;  and (ix) to the  extent  not
      otherwise  included,  obligations  under Currency  Agreements and Interest
      Rate Agreements.

            "GAAP" means generally accepted accounting  principles in the United
      States as in effect at the time any particular determination is made.

            "Incurrence" means the issuance, incurrence, creation, assumption or
      in any other manner  becoming  liable with respect to, or the extension of
      the maturity or mandatory  redemption date of, or becoming responsible for
      the payment of, any Debt,  preferred stock or Lien. "Incur" and "Incurred"
      shall have correlative meanings.

            "Interest  Rate  Agreements"  means  any  interest  rate  protection
      agreement, interest rate future, interest rate option, interest rate swap,
      interest  rate cap or other  interest  rate hedge  agreement,  to or under
      which the  Corporation  is a party or a beneficiary  on the date hereof or
      becomes a party or a beneficiary hereafter.

            "Lien" means any pledge,  mortgage,  lien, charge, security interest
      or encumbrance of any kind.





EXHIBIT 4.2

                    CERTIFICATE OF THE DESIGNATIONS, VOTING POWERS,
             PREFERENCES AND RELATIVE, PARTICIPATING, OPTIONAL AND
            OTHER SPECIAL RIGHTS AND QUALIFICATIONS, LIMITATIONS OR
           RESTRICTIONS OF 8% CUMULATIVE CONVERTIBLE PREFERRED STOCK,
                    SERIES A OF CORNERSTONE  PROPERTIES INC.


            The undersigned hereby certify that they are the duly elected and
acting Executive Vice President and Secretary of CORNERSTONE PROPERTIES INC., a
Nevada corporation (the "Corporation"), and pursuant to Nev. Rev. Stat. ss.
78.1955, DO HEREBY CERTIFY:

            That, pursuant to authority conferred upon the Board of Directors of
the  Corporation  by  ARTICLE  4  of  the  Amended  and  Restated   Articles  of
Incorporation (the "Articles") and conferred upon the  Administrative  Committee
by the  Board  of  Directors,  the  Administrative  Committee  of the  Board  of
Directors of the Corporation by unanimous written consent dated November 7, 1996
adopted the following resolution creating a series of Preferred Stock designated
as 8% Cumulative Convertible Preferred Stock, Series A:

            RESOLVED,  that  pursuant to the authority  expressly  vested in the
Board  of  Directors  in  accordance  with the  provisions  of its  Articles  of
Incorporation,  a series of  Preferred  Stock of the  Corporation,  without  par
value,  be and it hereby is, created and that the designation and amount thereof
and the voting powers,  preferences,  and relative  rights of the shares of such
series, and the limitations and restrictions thereof, are as follows:

            1. Designation and Amount;  Fractional  Shares.  The designation for
such series of the Preferred Stock authorized by this resolution shall be the 8%
Cumulative  Convertible  Preferred  Stock,  Series A, without par value,  with a
stated  value of $145.00 per share (the "8%  Preferred  Stock,  Series A").  The
stated value per share of 8% Preferred Stock, Series A shall not for any purpose
be considered to be a  determination  by the Board of Directors  with respect to
the capital and surplus of the  Corporation.  The maximum number of shares of 8%
Preferred Stock, Series A shall be 458,621.  The 8% Preferred Stock, Series A is
issuable in whole shares only.

            2. Dividends. Holders of shares of 8% Preferred Stock, Series A will
be entitled to receive,  when,  as and if declared by the Board of Directors out
of assets of the  Corporation  legally  available  for payment,  cash  dividends
payable  quarterly  at the rate of 8% per annum.  Dividends  on the 8% Preferred
Stock, Series A will be payable quarterly on March 31, June 30, September 30 and
December  31 (the  "dividend  payment  dates").  Dividends  on  shares of the 8%
Preferred  Stock,  Series A will be cumulative from the date of initial issuance
of such shares of 8% Preferred  Stock,  Series A. Dividends will be payable,  in
arrears,  to  holders  of  record  as they  appear  on the  stock  books  of the
Corporation  on such record  dates,  not more than 60 days nor less than 10 days
preceding  the  payment  dates  thereof,  as  shall  be  fixed  by the  Board of
Directors.  The amount of dividends  payable for each full dividend period shall
be computed  by  dividing  the annual  dividend  payment by four.  The amount of
dividends  payable  for the  initial  dividend  period or any period  shorter or
longer than a full dividend period shall be calculated on the basis of a 360-day
year of twelve 30-day months.  No dividends may be declared or paid or set apart
for payment on any Parity  Preferred Stock (as defined in paragraph 12(a) below)
with regard to the payment of dividends  unless there shall also be or have been
declared and paid or set apart for payment on the 8% Preferred Stock,  Series A,
like  dividends  for all dividend  payment  periods of the 8%  Preferred  Stock,
Series A ending on or before the dividend  payment date of such Parity Preferred
Stock,  ratably  in  proportion  to the  respective  amounts  of  dividends  (x)
accumulated  and unpaid or payable on such Parity  Preferred  Stock,  on the one
hand,  and (y)  accumulated  and unpaid  through the dividend  payment period or
periods of the 8% Preferred Stock, Series A next preceding such dividend payment
date, on the other hand.  All  dividends  payable in respect of the 8% Preferred
Stock, Series A will, to the extent permitted under the Internal Revenue Code of
1986, as amended (the "Code") and not preferential within the meaning of Section
562(c) of the Code,  be paid  first out of  earnings  and  profits  (within  the
meaning of Section 316 of the Code) other than earnings and profits attributable
to gains  from sales or  exchanges  of United  States  real  property  interests
(within the meaning of Section 897 of the Code).

            Except  as  set  forth  in  the  preceding  sentence,   unless  full
cumulative  dividends on the 8%  Preferred  Stock,  Series A have been paid,  no
dividends  (other  than  in  Common  Stock  of the  Corporation)  may be paid or
declared  and set aside for payment or other  distribution  made upon the Common
Stock or on any other stock of the Corporation  ranking junior to or on a parity
with the 8% Preferred Stock, Series A as to dividends,  nor may any Common Stock
or any other stock of the Corporation  ranking junior to or on a parity with the
8% Preferred Stock, Series A as to dividends be redeemed, purchased or otherwise
acquired for any  consideration  (or any payment be made to or  available  for a
sinking fund for the redemption of any shares of such stock; provided,  however,
that any moneys  theretofore  deposited  in any sinking fund with respect to any
Preferred  Stock of the  Corporation  in compliance  with the provisions of such
sinking fund may  thereafter  be applied to the purchase or  redemption  of such
Preferred Stock in accordance with the terms of such sinking fund, regardless of
whether at the time of such application full cumulative dividends upon shares of
the 8% Preferred  Stock,  Series A outstanding to the last dividend payment date
shall have been paid or declared and set apart for payment) by the  Corporation;
provided  further  that any such junior stock or Parity  Preferred  Stock or the
Common Stock may be converted  into or  exchanged  for stock of the  Corporation
ranking  junior  to the 8%  Preferred  Stock,  Series  A as to  dividends;  and,
provided  further,  that any such junior stock or Parity  Preferred Stock or the
Common Stock may be purchased  by the  Corporation  pursuant to Article 8 of the
Restated  Articles of  Incorporation to preserve the  Corporation's  status as a
real estate investment trust.

            3. Liquidation Preference.  The shares of 8% Preferred Stock, Series
A shall rank, as to liquidation,  dissolution or winding up of the  Corporation,
prior  to the  shares  of  Common  Stock  and any  other  class  of stock of the
Corporation ranking junior to the 8% Preferred Stock, Series A as to rights upon
liquidation,  dissolution or winding up of the Corporation, so that in the event
of any  liquidation,  dissolution  or  winding  up of the  Corporation,  whether
voluntary or involuntary,  the holders of the 8% Preferred Stock, Series A shall
be  entitled  to receive  out of the  assets of the  Corporation  available  for
distribution  to its  stockholders,  whether from capital,  surplus or earnings,
before any  distribution  is made to  holders  of shares of Common  Stock or any
other such junior stock, an amount equal to $145.00 per share (the  "Liquidation
Preference" of a share of 8% Preferred Stock,  Series A) plus an amount equal to
all dividends  (whether or not earned or declared)  accrued and  accumulated and
unpaid  on the  shares  of 8%  Preferred  Stock,  Series  A to the date of final
distribution.  The  holders  of the 8%  Preferred  Stock,  Series  A will not be
entitled to receive the Liquidation  Preference until the liquidation preference
of any  other  class  of  stock  of the  Corporation  ranking  senior  to the 8%
Preferred Stock, Series A as to rights upon liquidation,  dissolution or winding
up shall have been paid (or a sum set aside  therefor  sufficient to provide for
payment) in full. After payment of the full amount of the Liquidation Preference
and such dividends,  the holders of shares of 8% Preferred Stock,  Series A will
not be entitled to any further  participation  in any  distribution of assets by
the  Corporation.  If, upon any  liquidation,  dissolution  or winding up of the
Corporation,  the assets of the Corporation, or proceeds thereof,  distributable
among the holders of shares of Parity  Preferred  Stock shall be insufficient to
pay in full the preferential amount aforesaid, then such assets, or the proceeds
thereof,  shall be  distributable  among such holders ratably in accordance with
the  respective  amounts  which  would be payable on such  shares if all amounts
payable  thereon  were  paid  in  full.  For  the  purposes  hereof,  neither  a
consolidation or merger of the Corporation with or into another corporation, nor
a merger of any other  corporation with or into the  Corporation,  nor a sale or
transfer of all or any part of the  Corporation's  assets for cash or securities
shall be considered a liquidation, dissolution or winding up of the Corporation.

            4.    Conversion.

      I. The holders of shares of 8%  Preferred  Stock,  Series A shall have the
right, at their option,  to convert shares of 8% Preferred Stock,  Series A into
shares of Common Stock at any time,  on and subject to the  following  terms and
conditions:

            (a) The shares of 8% Preferred Stock,  Series A shall be convertible
      at the office of any transfer agent for the 8% Preferred Stock,  Series A,
      and at such other office or offices, if any, as the Board of Directors may
      designate, into fully paid and nonassessable shares (calculated as to each
      conversion  to the  nearest  1/100th of a share) of Common  Stock,  at the
      conversion  price,  determined as hereinafter  provided,  in effect at the
      time of conversion, each share of 8% Preferred Stock, Series A being taken
      at $145.00 for the purpose of such  conversion.  The price at which shares
      of Common  Stock  shall be  delivered  upon  conversion  (the  "conversion
      price")  shall  be  initially  $14.50  per  share  of  Common  Stock.  The
      conversion price shall be adjusted as provided in paragraph (d) below.

            (b) In order to convert shares of the 8% Preferred  Stock,  Series A
      into  Common  Stock,  the holder  thereof  shall  surrender  at any office
      hereinabove  mentioned the  certificate  or  certificates  therefor,  duly
      endorsed to the  Corporation  or in blank,  and give written notice to the
      Corporation at said office that such holder elects to convert such shares.
      No payment or adjustment  shall be made upon any  conversion on account of
      any  dividends  accrued  on the  shares of 8%  Preferred  Stock,  Series A
      surrendered  for  conversion  or on account of any dividends on the Common
      Stock  issued  upon such  conversion.  Shares of the 8%  Preferred  Stock,
      Series A shall be deemed to have been converted  immediately  prior to the
      close of business on the day of surrender of such shares for conversion in
      accordance with the foregoing  provisions (the "conversion date"), and the
      person or persons  entitled to receive the Common Stock issuable upon such
      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  Corporation  shall  issue and shall
      deliver at said office a  certificate  or  certificates  for the number of
      full shares of Common Stock issuable upon such conversion, together with a
      cash payment in lieu of any fraction of a share, as hereinafter  provided,
      to the person or persons entitled to receive the same.

            (c) No  fractional  shares of  Common  Stock  shall be  issued  upon
      conversion of shares of 8% Preferred Stock,  Series A, but, in lieu of any
      fraction of a share of Common  Stock which would  otherwise be issuable in
      respect of the aggregate number of shares of 8% Preferred Stock,  Series A
      surrendered for conversion at one time by the same holder, the Corporation
      shall pay in cash as an adjustment of such fraction an amount equal to the
      same fraction of the Closing Price (as defined below) on the date on which
      such shares of the 8% Preferred Stock,  Series A were duly surrendered for
      conversion,  or, if such date is not a Trading Date (as defined below), on
      the next Trading Date.

            (d)   The conversion price shall be adjusted from time to time as
      follows:

                  (1) In case the Corporation  shall (i) pay a dividend (or make
            a distribution) on its outstanding  shares of Common Stock in Common
            Stock,  (ii)  subdivide  or split its  outstanding  shares of Common
            Stock  into  a  larger  number  of  shares  by  reclassification  or
            otherwise, (iii) combine its outstanding shares of Common Stock into
            a smaller number of shares by reclassification or otherwise, or (iv)
            issue any shares of Common Stock by reclassification, the conversion
            price in effect at the time of the record date for such  dividend or
            distribution   or  other   effective   date  of  such   subdivision,
            combination or reclassification shall be adjusted so that the holder
            of any  shares  of 8%  Preferred  Stock,  Series A  surrendered  for
            conversion  after such time shall be  entitled to receive the number
            of shares of Common Stock which he would have owned or been entitled
            to receive had such shares of the 8% Preferred Stock,  Series A been
            converted immediately prior to such time.

                  (2) In case the Corporation  shall issue rights or warrants 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 clause (4)
            below) on the record  date for the  distribution  of such  rights or
            warrants,  the conversion price in effect at the opening of business
            on such  record  date shall be adjusted so that the same shall equal
            the price  determined by multiplying  the  conversion  price then in
            effect by a fraction,  of which the numerator shall be the number of
            shares of Common Stock then outstanding plus the number of shares of
            Common Stock which the aggregate  exercise price of such warrants or
            rights  exercised would purchase at such current market price and of
            which the denominator  shall be the number of shares of Common Stock
            then  outstanding  plus the  number of  additional  shares of Common
            Stock  issued  upon the  exercise of such  warrants or rights.  Such
            adjustment  shall become effective at the opening of business on the
            business  day  next  following  the  computation   thereof.  If  the
            conversion price shall be adjusted at any time under or by reason of
            provisions  in this clause  (2),  then,  in case of the  delivery of
            Common  Stock upon the  exercise  of any such  right or warrant  the
            conversion  price  then  in  effect  hereunder  shall  forthwith  be
            adjusted to such  respective  amount as would have been obtained had
            such right or warrant  never been issued as to such Common Stock and
            had adjustments  been made upon the issuance of the shares of Common
            Stock delivered as aforesaid.

                  (3) In case the Corporation shall distribute to all holders of
            its Common Stock evidences of its indebtedness or assets  (excluding
            any cash or stock dividends or distributions and dividends  referred
            to in clause (1) above) or rights or  warrants to  subscribe  for or
            purchase  securities of the  Corporation or any of its  subsidiaries
            (other than shares of Common Stock referred to in clause (2) above),
            then in each such case 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 date of such
            distribution  by a  fraction  of which  the  numerator  shall be the
            current market price per share (determined as provided in clause (4)
            below) of the Common Stock on the record date  mentioned  below less
            the then fair market value (as determined by the Board of Directors,
            whose  determination  shall be  conclusive)  of the  portion  of the
            assets  or  evidences  of  indebtedness  or rights  or  warrants  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 shall become effective on the opening
            of business on the business day next  following  the record date for
            the   determination   of  stockholders   entitled  to  receive  such
            distribution.

                  (4) For the purpose of any computation  under clause (1), (2),
            or (3) above,  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 30 consecutive Trading Dates commencing not more than
            45 Trading  Dates  before the day in question,  such 30  consecutive
            Trading Date period to be specified by the Board of Directors  prior
            to the  commencement of 45 Trading Dates before the day in question,
            or in the event  the Board of  Directors  fails to  specify  such 30
            consecutive  Trading Dates, such 30 consecutive  Trading Dates shall
            be deemed to have  commenced on the 40th Trading Date before the day
            in question.

                  (5) No adjustment  in the  conversion  price  pursuant to this
            paragraph  4 shall be  required  unless  (i) such  adjustment  would
            require  an  increase  or  decrease  of at least  1% in such  price;
            provided  that any  adjustment  which by  reason  of this  paragraph
            (d)(5) is not required to be made shall be carried forward and taken
            into account in any subsequent  adjustment and will be made not more
            than three  years after the time it would have been made but for the
            provisions of this paragraph  (d)(5);  provided further that, at the
            time  of  any  adjustment,   such   adjustment   shall  include  all
            adjustments  to the date thereof  then being  carried  forward.  All
            calculations  under this  paragraph  4 shall be made to the  nearest
            1/100th of a cent or to the nearest  1/100th of a share, as the case
            may be.

            (e) In case of any  consolidation  or merger of the Corporation with
      or into another  corporation  or in the case of any sale or  conveyance to
      another   corporation  (other  than  a  wholly-owned   subsidiary  of  the
      Corporation) of all or substantially all of the property and assets of the
      Corporation,  the holder of a share of the 8%  Preferred  Stock,  Series A
      shall have the right  thereafter  to convert  such share into the kind and
      amount of shares of stock and other  securities and properties  receivable
      upon such  consolidation,  merger,  sale or  conveyance by a holder of the
      number of shares of Common  Stock into  which  such share of 8%  Preferred
      Stock,  Series  A might  have  been  converted  immediately  prior to such
      consolidation,  merger,  sale  or  conveyance  and  shall  have  no  other
      conversion rights with regard to such share of 8% Preferred Stock,  Series
      A. In the  event  of such a  consolidation,  merger,  sale or  conveyance,
      effective  provision shall be made in the certificate of  incorporation of
      the resulting or surviving  corporation or otherwise for the protection of
      the conversion  rights of the shares of the 8% Preferred  Stock,  Series A
      which shall be  applicable,  as nearly as  reasonably  may be, to any such
      other shares of stock and other  securities and property  deliverable upon
      conversion  of  shares  of the 8%  Preferred  Stock,  Series  A.  In  case
      securities  or  properties  other than  Common  Stock shall be issuable or
      deliverable  upon  conversion  as aforesaid,  then all  references in this
      paragraph 4 shall be deemed to apply,  so far as appropriate and as nearly
      as may be, to such other securities or properties.

            (f)   Whenever the conversion price is adjusted as herein provided:

                  (1) the  Corporation  shall  compute the  adjusted  conversion
            price in  accordance  with  this  paragraph  4 and  shall  prepare a
            certificate  signed by the  President or one of the Vice  Presidents
            and  the  Treasurer  or  one  of  the  Assistant  Treasurers  of the
            Corporation  setting forth the adjusted  conversion  price, and such
            certificate  shall  forthwith  be filed with the  transfer  agent or
            agents for the 8% Preferred Stock, Series A; and

                  (2) a  notice  stating  that  the  conversion  price  has been
            adjusted and setting forth the adjusted  conversion  price shall, as
            soon as  practicable,  be  mailed  to the  holders  of record of the
            outstanding shares of 8% Preferred Stock, Series A.

            (g)   In case at any time:

                  (1) the  Corporation  shall  declare a dividend  (or any other
            distribution) on its Common Stock payable otherwise than in cash out
            of profits or surplus; or

                  (2)  the  Corporation  shall  authorize  the  granting  to the
            holders of its Common Stock of rights to  subscribe  for or purchase
            any shares of  capital  stock of any class or series or of any other
            rights; or

                  (3)  of  any  reclassification  of the  capital  stock  of the
            Corporation   (other  than  a  subdivision  or  combination  of  its
            outstanding  shares of Common  Stock),  or of any  consolidation  or
            merger to which the Corporation is a party and for which approval of
            any  stockholders of the Corporation is required,  or of the sale or
            transfer of all or  substantially  all of the property and assets of
            the  Corporation,  or of the voluntary or  involuntary  dissolution,
            liquidation or winding up of the Corporation;

      then the  Corporation  shall cause to be mailed to the  transfer  agent or
      agents for the 8% Preferred  Stock,  Series A and to the holders of record
      of the  outstanding  shares of 8% Preferred  Stock,  Series A, at least 20
      days (or 10 days in any case  specified  in clause (1) or (2) above) prior
      to the applicable record date hereinafter  specified, a notice stating (x)
      the  date on  which a  record  is to be  taken  for  the  purpose  of such
      dividend,  distribution or rights, 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  or rights 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 or other property  deliverable upon such  reclassification,
      consolidation, merger, sale, transfer, dissolution, liquidation or winding
      up.

            (h) The  Corporation  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 the shares of the 8%
      Preferred Stock,  Series A, the full number of shares of Common Stock then
      deliverable  upon the  conversion  of all  shares of 8%  Preferred  Stock,
      Series A then outstanding.

            (i) The Corporation  will pay any and all transfer taxes that may be
      payable in respect of the  issuance or delivery of shares of Common  Stock
      on conversion of shares of 8% Preferred  Stock,  Series A pursuant hereto.
      The Corporation 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 in which the shares of
      8% Preferred  Stock,  Series A so converted were  registered,  and no such
      issue or  delivery  shall be made  unless and until the person  requesting
      such issue has paid to the  Corporation the amount of any such tax, or has
      established,  to the  satisfaction of the  Corporation,  that such tax has
      been paid.

            (j) For the purpose of this  paragraph  4, the term  "Common  Stock"
      shall  include  any  stock of any  class of the  Corporation  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
      Corporation,  and which is not subject to redemption  by the  Corporation.
      However,  shares  issuable  on  conversion  of shares of the 8%  Preferred
      Stock,  Series A shall  include only shares of Common Stock as such Common
      Stock  exists  on the date of this  Certificate  or shares of any class or
      classes resulting from any reclassification or  reclassifications  thereof
      and which have 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  Corporation  and which are not subject to redemption by
      the Corporation, provided that if at any time there shall be more than one
      such resulting class, the shares of each such class then so issuable shall
      be  substantially  in the  proportion  which the total number of shares of
      such class  resulting from all such  reclassifications  bears to the total
      number   of  shares  of  all  such   classes   resulting   from  all  such
      reclassifications.

            (k) As used in this paragraph 4, the term "Closing Price" on any day
      shall mean the  reported  last sales price on such day or, in case no such
      sale takes place on such day, the average of the reported  closing bid and
      asked  prices,  in each case on the New York  Stock  Exchange,  or, if the
      Common Stock is not listed or admitted to trading on such Exchange, on the
      Frankfurt  Stock  Exchange,  or,  if the  Common  Stock is not  listed  or
      admitted to trading on such Exchange, on the principal securities exchange
      on which the Common Stock is listed or admitted to trading on which prices
      are quoted in U.S.  dollars,  or, if not listed or  admitted to trading on
      any such  securities  exchange,  the  average of the closing bid and asked
      prices as furnished in U.S.  dollars by any  broker/dealer  selected  from
      time to time by the  Board of  Directors  for that  purpose;  and the term
      "Trading Date" shall mean a date on which the New York Stock Exchange, the
      Frankfurt Stock Exchange or other  applicable  securities  market used for
      determining the Closing Price is open for the transaction of business.  To
      the extent  required,  a Closing Price shall be converted to U.S.  dollars
      from  deutsche  marks or to deutsche  marks from U. S. dollars at the noon
      buying rate in New York City for cable transfers in foreign  currencies as
      certified for customs purposes by the Federal Reserve Bank of New York for
      the date in question.

      II. The Corporation  shall have the right,  at its option,  to convert all
shares of 8% Preferred  Stock,  Series A then  outstanding into shares of Common
Stock upon the consummation  (the "Qualified Public Offering Closing Date") of a
"Qualified Public Offering" (as defined in paragraph 5(e) below), on and subject
to the same terms and  conditions  as apply to  conversions  of the 8% Preferred
Stock,  Series A at the option of the holders thereof pursuant to subparagraph I
of this paragraph 4, except that the following provisions shall be applicable to
a conversion by the Corporation pursuant to this subparagraph II:

            (a) Such  conversion  shall  be at the  conversion  price in  effect
      immediately  prior  to the  close  of  business  on the  Qualified  Public
      Offering Closing Date.

            (b) Unless  the  Corporation  gives  notice to the  contrary  to the
      transfer  agent or agents for the 8%  Preferred  Stock,  Series A at least
      three business days prior to the Qualified  Public Offering  Closing Date,
      it will be deemed to have elected to convert all outstanding  shares of 8%
      Preferred  Stock,  Series A immediately  prior to the close of business on
      the Qualified Public Offering Closing Date.

            (c) Whenever the 8% Preferred Stock,  Series A is converted pursuant
      to this  subparagraph  II,  a  notice  to that  effect  shall,  as soon as
      practicable,  be mailed to the holders of record of the outstanding shares
      of 8%  Preferred  Stock,  Series A. In order to receive a  certificate  or
      certificates  for the Common Stock  issuable upon such  conversion and any
      cash  payment  in lieu of any  fraction  of a  share,  the  holders  of 8%
      Preferred  Stock,  Series A shall  surrender at the office of any transfer
      agent for the 8%  Preferred  Stock,  Series A, or at such other  office or
      offices, if any, as the Board of Directors may designate,  the certificate
      or certificates for the 8% Preferred Stock, Series A, duly endorsed to the
      Corporation or in blank.  No payment or adjustment  shall be made upon any
      conversion  pursuant  hereto on  account of any  dividends  accrued on the
      shares of 8% Preferred Stock,  Series A converted by the Corporation or on
      account of any dividends on the Common Stock issued upon such conversion.

            (d)  Except  as  superseded  by the  foregoing,  the  provisions  of
      subparagraph I of this paragraph 4 shall apply,  so far as appropriate and
      as nearly as may be, to this subparagraph II.

            Notwithstanding  the  foregoing,  in no event shall the 8% Preferred
Stock,  Series A be converted  pursuant to this  subparagraph  II of paragraph 4
unless  all  shares  of  8%  Cumulative   Convertible  Preferred  Stock  of  the
Corporation  then  outstanding are also converted by the Corporation into Common
Stock at the same time.

            5.  Voting  Rights.  The  holders of shares of 8%  Preferred  Stock,
Series A shall have no voting rights whatsoever, except for any voting rights to
which they may be entitled under the laws of the State of Nevada,  and except as
follows:

            (a) In the event that,  at any time or times,  dividends  payable on
      the shares of 8%  Preferred  Stock,  Series A shall be in arrears  for two
      consecutive  calendar  quarters or more,  the  holders of the  outstanding
      shares  of 8%  Preferred  Stock,  Series A shall  have the  right  (voting
      together as a class) to elect one member of the Board of Directors at such
      time or  times  and  thereafter  until  such  rights  shall  terminate  in
      accordance  with the provisions of this paragraph 5 or in accordance  with
      applicable laws. Such director shall be an additional director of the then
      existing Board of Directors.

            (b) Any right to elect a director  which  arises  because  dividends
      payable on the shares of 8% Preferred Stock, Series A have been in arrears
      for two  consecutive  calendar  quarters or more shall continue until such
      arrearages  have been paid or set apart for  payment,  at which  time such
      right  shall  terminate,  except as herein or by law  expressly  provided,
      subject to revesting in the event of each and every subsequent  default of
      the character above mentioned.

            (c) The term of office of any director then in office elected by the
      holders  of  shares of 8%  Preferred  Stock,  Series A  because  dividends
      payable on the shares of 8% Preferred Stock, Series A have been in arrears
      for two  consecutive  calendar  quarters or more shall terminate 18 months
      following  any  termination  of the right of the  holders  of shares of 8%
      Preferred  Stock,  Series  A as a class to vote for  directors  as  herein
      provided.  Whenever  the term of office  of any  director  elected  by the
      holders of shares of the 8% Preferred Stock,  Series A who are entitled to
      vote  in such  manner  shall  end,  the  number  of the  directors  of the
      Corporation shall be reduced correspondingly.  Any director who shall have
      been  elected  pursuant  to this  paragraph  5 may be removed at any time,
      either with or without cause by the holders of the  outstanding  shares of
      8% Preferred  Stock,  Series A, voting  separately as a class. Any vacancy
      thereby created may be filled only by the affirmative  vote of the holders
      of shares of 8% Preferred Stock, Series A voting separately as a class. If
      the  office  of any  director  elected  by the  holders  of  shares  of 8%
      Preferred Stock,  Series A voting as a class becomes vacant for any reason
      other than the removal from office as aforesaid, any remaining director or
      directors  elected  pursuant to this  paragraph may choose a successor who
      shall hold office for the unexpired  term in respect of which such vacancy
      occurred.  At elections  for such  directors,  each holder of shares of 8%
      Preferred  Stock,  Series A shall be  entitled  to one vote for each share
      held.

            (d) Prior to the  completion  of a Qualified  Public  Offering,  the
      consent  of the  holders  of at  least  a  majority  of the  shares  of 8%
      Preferred  Stock,  Series A  outstanding  at the time  (voting as a class)
      given in person or by proxy,  either in writing or at any  meeting  called
      for the purpose,  shall be necessary to permit, effect or validate any one
      or more of the following:

                  (i) the  amendment,  alteration or repeal,  whether by merger,
            consolidation or otherwise, of any of the provisions of the Restated
            Articles  of   Incorporation   (including  this  resolution  or  any
            provision  hereof) that would  materially  and adversely  affect any
            power,  preference  or special  right of the shares of 8%  Preferred
            Stock,  Series  A or of  the  holders  thereof;  provided  that  the
            creation  and  issuance of other series of Common Stock or Preferred
            Stock,  in each case  ranking  junior to the shares of 8%  Preferred
            Stock,  Series A with  respect to the payment of  dividends  and the
            distribution of assets upon liquidation,  dissolution or winding up,
            shall not be deemed to materially and adversely  affect such powers,
            preferences or special rights;

                  (ii) the amendment,  alteration or repeal,  whether by merger,
            consolidation or otherwise, of any of the provisions of the Restated
            Articles of Incorporation  or Bylaws of the Corporation  which would
            have the effect of increasing  the size of the Board of Directors of
            the  Corporation  to greater than nine  members,  provided  that the
            Board of  Directors  may be  increased in order to allow one or more
            directors  elected by holders of 8% Preferred Stock,  Series A to be
            seated;

                  (iii) the amendment,  alteration or repeal, whether by merger,
            consolidation or otherwise, of any of the provisions of the Restated
            Articles  of   Incorporation   (including  this  resolution  or  any
            provision  hereof)  that would  increase  the  amount of  authorized
            Common Stock or authorized Preferred Stock;

                  (iv) the creation of any other class or series of stock of the
            Corporation  ranking  prior to or on a parity with the 8%  Preferred
            Stock,  Series A (as those  terms are  defined  in  paragraph  12(a)
            hereof); or

                  (v) the  repurchase or other  acquisition  of shares of Common
            Stock or  Preferred  Stock,  other than  pursuant  to  paragraph  8,
            paragraph  9 or  paragraph  10 hereof or in the  ordinary  course of
            business.

            (e) As  used  herein,  the  term  "Public  Offering"  shall  mean an
      underwritten  public  offering of Common  Stock  pursuant to an  effective
      registration statement under the 1933 Act and listed on the New York Stock
      Exchange.  A "Qualified  Public  Offering"  shall mean: a Public  Offering
      prior to January 1, 2000 in which (i) the  aggregate  net  proceeds to the
      Corporation  (after  payment  of all fees and  expenses  of the  offering)
      together  with the net  proceeds of any prior  Public  Offerings of Common
      Stock  listed on the New York Stock  Exchange  equal or exceed the Minimum
      Amount (as defined below) and (ii) (a) if the Public Offering is completed
      in calendar  year 1997,  the  initial  public  offering  price is at least
      $16.00 per share, (b) if the Public Offering is completed in calendar year
      1998,  the initial  public  offering price is at least $16.50 per share or
      (c) if the Public Offering is completed in calendar year 1999, the initial
      public  offering  price is at least $17.00 per share;  provided,  however,
      that a  Qualified  Public  Offering  shall be deemed to occur on the first
      business  day which  follows any period of 20 trading  days after a Public
      Offering and prior to January 1, 2000, in which the average of the closing
      prices for shares of the Common  Stock as  reported  on the New York Stock
      Exchange composite tape equals or exceeds the applicable minimum price for
      a Public  Offering to be  considered a Qualified  Public  Offering at such
      time. "Minimum Amount" shall mean, at any time, the sum of (i) $75 million
      plus (ii) the  product  of .5618  multiplied  by the  stated  value of all
      shares  of  8%  Cumulative  Convertible  Preferred  Stock  issued  by  the
      Corporation prior to such time and after November 1, 1996.

            (f) The foregoing voting  provisions shall not apply if, at or prior
      to the time when the act with  respect to which such vote would  otherwise
      be required  shall be  effected,  all  outstanding  shares of 8% Preferred
      Stock,  Series A shall have been  redeemed  or called for  redemption  and
      sufficient  funds  shall  have  been  deposited  in trust to  effect  such
      redemption.

            6. Authorization and Issuance of Other Securities. No consent of the
holders  of the 8%  Preferred  Stock,  Series  A shall be  required  for (a) the
creation of any indebtedness of any kind of the  Corporation,  (b) the creation,
or increase  or  decrease in the amount,  of any class or series of stock of the
Corporation  ranking junior as to dividends or upon liquidation,  dissolution or
winding up to the 8% Preferred Stock, Series A or (c) any increase,  decrease or
change in the par value of the Common Stock or in any other terms thereof.

            7.  Redemption  at the Option of the  Corporation.  The shares of 8%
Preferred  Stock,  Series A which  have not  previously  been  converted  may be
redeemed  by the  Corporation  as a whole in cash at the  Redemption  Price  (as
defined below), at any time on or after December 31, 2001, on the date fixed for
redemption (the  "Redemption  Date").  The "Redemption  Price" shall be $145 per
share,  plus a sum equal to all  dividends  accrued  and  unpaid  thereon to the
Redemption Date, plus a redemption premium (the "Redemption Premium") calculated
to cause the holders of the 8%  Preferred  Stock,  Series A to have  received an
internal rate of return of 12%. The method of calculating the Redemption Premium
is set forth in Exhibit A hereto.

            8. Procedure for Redemption.  The  Corporation  shall cause a notice
(the "Redemption Notice") to be mailed, first-class postage prepaid, at least 30
days, but not more than 90 days, prior to the Redemption Date, to each holder of
record of shares of 8% Preferred Stock, Series A to be redeemed. Such Redemption
Notice shall be mailed to such record holders at their  respective  addresses as
they appear upon the books of the Corporation and shall set forth the Redemption
Date, the Redemption Price and the place or places for surrender of certificates
for shares to be redeemed.

            Any Redemption Notice which is mailed by the Corporation as provided
in this  paragraph  8 shall be  conclusively  presumed  to have been duly given,
whether or not the stockholder  receives such Redemption  Notice, and failure to
give such notice by mail,  or any defect in such  notice,  to the holders of any
shares of 8%  Preferred  Stock,  Series A shall not affect the  validity  of the
proceedings  for the redemption of any other shares.  On or after the Redemption
Date specified in such Redemption  Notice,  each holder of the shares called for
redemption  shall  surrender  the  certificate  evidencing  such  shares  to the
Corporation  at the place  designated  in such  notice  and shall  thereupon  be
entitled to receive the  Redemption  Price.  If, on the Redemption  Date,  funds
necessary  for the  redemption  shall be available  therefor and shall have been
irrevocably deposited or set aside, then,  notwithstanding that the certificates
evidencing  such  shares  of 8%  Preferred  Stock,  Series A shall not have been
surrendered,  the  dividends  with respect to the shares of 8% Preferred  Stock,
Series A shall cease to accrue after the  Redemption  Date,  the shares shall no
longer  be deemed to be  outstanding,  the  holders  thereof  shall  cease to be
stockholders  of the  Corporation,  and all rights  with  respect to such shares
shall forthwith  terminate  (except the right to receive the amount payable upon
redemption of the shares to be redeemed, without interest).

            9.  Redemption at the Option of the Holder.  (a) If the  Corporation
has not  completed,  prior to January 1, 2001,  a Public  Offering  in which the
aggregate  net  proceeds  to the  Corporation  (after  payment  of all  fees and
expenses of the offering) equal or exceed $75,000,000,  each holder of shares of
8% Preferred Stock,  Series A shall have the right to require  redemption of its
shares of 8% Preferred Stock,  Series A by the Corporation in cash,  pursuant to
the offer  described  below (the "Put  Offer")  at a price  equal to 100% of the
stated  value per share  plus a sum equal to all  dividends  accrued  and unpaid
thereon (if any) to the related Put Date defined below (the "Put Payment").  The
right to require redemption of the 8% Preferred Stock, Series A pursuant to this
paragraph 9 shall arise on January 1, 2001 or on the first day thereafter  which
is the first day of a month and on which  there are no  accumulated  and  unpaid
dividends on the 7% Cumulative Convertible Preferred Stock of the Corporation or
on any other class or series of preferred stock of the Corporation ranking prior
to  or  on a  parity  with  the  8%  Preferred  Stock,  Series  A  (the  "Option
Commencement  Date"). The right to require redemption of the 8% Preferred Stock,
Series A shall  extend  from the Option  Commencement  Date to the date which is
three calendar months thereafter (the "Option Period").

      (b)  Within  10  days  of the  commencement  of  the  Option  Period,  the
Corporation  shall mail a notice (the "Put  Notice") to each holder of record of
the 8% Preferred Stock, Series A stating:

            (i) that the  Option  Period  has  commenced,  that the Put Offer is
      being made pursuant to the terms of the 8% Preferred  Stock,  Series A and
      that all shares of 8% Preferred  Stock,  Series A validly tendered will be
      accepted for redemption, provided, that the holders of such shares provide
      notice to the Corporation on or prior to the last day of the Option Period
      of their intention to redeem and of the number shares to be redeemed;

            (ii) the redemption price and the date of redemption (which, subject
      to the provisions of  subparagraph  (e) below,  shall be a business day no
      earlier than 30 days from the date such notice is mailed and no later than
      the first anniversary of the Option Commencement Date) (the "Put Date");

            (iii) that any shares of 8% Preferred Stock, Series A not tendered
      will continue to accumulate dividends;

            (iv) that, unless the Corporation defaults in the payment of the Put
      Payment,  any  shares  of  8%  Preferred  Stock,  Series  A  accepted  for
      redemption  pursuant to the Put Offer shall cease to accumulate  dividends
      after the Put Date;

            (v) that  holders of 8% Preferred  Stock,  Series A electing to have
      any shares of 8% Preferred  Stock,  Series A redeemed  pursuant to the Put
      Offer will be required to surrender  the  certificates  representing  such
      shares of 8% Preferred  Stock,  Series A to the transfer  agent for the 8%
      Preferred Stock,  Series A at the address specified in the notice prior to
      1:00 P.M., New York City time, on the business day  immediately  preceding
      the Put Date; and

            (vi) that holders whose shares of 8% Preferred  Stock,  Series A are
      being redeemed only in part will be issued new  certificates  representing
      shares of 8% Preferred  Stock,  Series A equal in number to the unredeemed
      portion  of the  shares  of 8%  Preferred  Stock,  Series  A  surrendered;
      provided that each certificate  representing shares of 8% Preferred Stock,
      Series A  redeemed  and each new  certificate  representing  shares  of 8%
      Preferred Stock, Series A issued shall be in whole shares.

      (c)   On or before the Put Date:

            (i) the transfer  agent for the 8% Preferred  Stock,  Series A shall
      deliver to the Corporation a certificate  specifying the aggregate  number
      of shares of 8% Preferred  Stock,  Series A delivered  for purchase by the
      holders of 8%  Preferred  Stock,  Series A prior to the Put  Payment  Date
      pursuant to the Change in Control Offer;

            (ii) the  Corporation  shall  accept  for  redemption  shares  of 8%
      Preferred Stock, Series A or portions thereof tendered pursuant to the Put
      Offer;

            (iii) the Corporation  shall deposit with the transfer agent for the
      8% Preferred Stock, Series A money sufficient to pay the purchase price of
      all  shares  of 8%  Preferred  Stock,  Series  A or  portions  thereof  so
      accepted; and

            (iv) the Corporation shall deliver, or cause to be delivered, to the
      transfer  agent  for  the  8%  Preferred  Stock,  Series  A  an  officers'
      certificate  specifying  the  shares of 8%  Preferred  Stock,  Series A or
      portions thereof accepted for payment by the Corporation.

      (d) The transfer agent for the 8% Preferred Stock, Series A shall promptly
mail to the holders of 8% Preferred  Stock,  Series A so accepted  payment in an
amount equal to the purchase price,  and the transfer agent for the 8% Preferred
Stock,  Series A shall  promptly  authenticate  and mail to such  holders  of 8%
Preferred Stock, Series A a new certificate  representing shares of 8% Preferred
Stock,  Series A equal in number to any  unpurchased  portion of the certificate
representing 8% Preferred Stock, Series A surrendered;  provided that each share
of 8% Preferred Stock, Series A purchased and each new certificate  representing
shares of 8%  Preferred  Stock,  Series A issued shall be in whole  shares.  The
Corporation  will  notify the  holders of 8%  Preferred  Stock,  Series A of the
results  of the Put Offer on or as soon as  practicable  after  the Put  Payment
Date.

      (e) In the event the  Corporation is unable to make the Put Payment due to
the  existence  of  accumulated  and unpaid  dividends on any class or series of
preferred stock of the Corporation, the Put Date shall be deemed to occur on the
business day ( the "Revised  Put Date") which falls 10 business  days  following
the first date which is the first day of a month, which the Corporation notifies
to the holders of record of the 8%  Preferred  Stock Series A and on which there
are no  accumulated  and unpaid  dividends  on any class or series of  preferred
stock of the Corporation,  provided,  that there shall be no requirement for any
holder of shares of 8% Preferred Stock, Series A to tender shares for redemption
on the Revised Put Date, and all rights of holders of 8% Preferred Stock, Series
A to redeem  such  shares  shall  expire if such  shares  are not  tendered  for
redemption on or prior to the Revised Put Date.

            10.  Change in  Control.  (a) Upon the  occurrence  of a "Change  in
Control",  each holder of 8% Preferred  Stock,  Series A shall have the right to
require the redemption of his 8% Preferred Stock, Series A by the Corporation in
cash,  pursuant to the offer described below (the "Change in Control Offer"), at
a price  equal to 101% of the  stated  value per  share  plus a sum equal to all
dividends  accrued and unpaid  thereon (if any) to the related Change in Control
Redemption Date. A "Change in Control" shall mean (i) a merger, consolidation or
reorganization of the Corporation,  if, after giving effect thereto, the holders
of the Common Stock prior to such transaction  shall fail to own at least 51% of
the  capital  stock  entitled  to vote  for the  election  of  directors  in the
successor  entity,  (ii) the sale of a  majority  or more of the  assets  of the
Corporation in any single transaction or in any series of related  transactions,
or  (iii)  a  change  in  the  composition  of the  Board  of  Directors  of the
Corporation such that during any period of two consecutive years the individuals
who at the  beginning  of such period were  directors of the  Corporation  shall
cease for any reason to  constitute a majority of the  directors  then in office
(and not  designated  to the Board by any holder of Preferred  Stock) unless the
individuals  replacing  such directors were elected or nominated by the Board of
Directors of the Corporation.

            (b) Within 30 days of any Change in Control,  the Corporation  shall
mail a notice (the  "Change in Control  Notice") to each holder of record of the
8% Preferred Stock, Series A stating:

            (i) that a Change  in  Control  has  occurred,  that the  Change  in
      Control  Offer is being  made  pursuant  to the terms of the 8%  Preferred
      Stock,  Series A and that  all  shares  of 8%  Preferred  Stock,  Series A
      validly tendered will be accepted for redemption;

            (ii) the redemption price and the date of redemption (which shall be
      a  business  day no  earlier  than 30 days nor later than 60 days from the
      date such notice is mailed) (the "Change in Control Redemption Date");

            (iii) that any shares of 8% Preferred Stock, Series A not tendered
      will continue to accumulate dividends;

            (iv) that,  unless the  Corporation  defaults  in the payment of the
      Change in Control  redemption  price,  any shares of 8%  Preferred  Stock,
      Series A accepted for  redemption  pursuant to the Change in Control Offer
      shall cease to accumulate dividends after the Change in Control Redemption
      Date;

            (v) that  holders of 8% Preferred  Stock,  Series A electing to have
      any shares of 8% Preferred Stock, Series A redeemed pursuant to the Change
      in  Control  Offer  will  be  required  to  surrender   the   certificates
      representing  such shares of 8% Preferred Stock,  Series A to the transfer
      agent for the 8% Preferred Stock, Series A at the address specified in the
      notice  prior to 1:00  P.M.,  New York  City  time,  on the  business  day
      immediately preceding the Change in Control Redemption Date; and

            (vi) that holders whose shares of 8% Preferred  Stock,  Series A are
      being purchased only in part will be issued new certificates  representing
      shares of 8% Preferred  Stock,  Series A equal in number to the unredeemed
      portion  of the  shares  of 8%  Preferred  Stock,  Series  A  surrendered;
      provided that each certificate  representing shares of 8% Preferred Stock,
      Series A  redeemed  and each new  certificate  representing  shares  of 8%
      Preferred Stock, Series A issued shall be in whole shares.

            (c)   On or before the Change in Control Redemption Date:

            (i) the transfer  agent for the 8% Preferred  Stock,  Series A shall
      deliver to the Corporation a certificate  specifying the aggregate  number
      of shares of 8% Preferred  Stock,  Series A delivered  for purchase by the
      holders  of 8%  Preferred  Stock,  Series A prior to the Change in Control
      Payment Date pursuant to the Change in Control Offer;

            (ii) the  Corporation  shall  accept  for  redemption  shares  of 8%
      Preferred Stock,  Series A or portions  thereof  tendered  pursuant to the
      Change in Control Offer;

            (iii) the Corporation  shall deposit with the transfer agent for the
      8% Preferred Stock, Series A money sufficient to pay the Change in Control
      redemption price of all shares of 8% Preferred Stock, Series A or portions
      thereof so accepted; and

            (iv) the Corporation shall deliver, or cause to be delivered, to the
      transfer  agent  for  the  8%  Preferred  Stock,  Series  A  an  officers'
      certificate  specifying  the  shares of 8%  Preferred  Stock,  Series A or
      portions thereof accepted for payment by the Corporation.

            (d) The transfer  agent for the 8% Preferred  Stock,  Series A shall
promptly mail to the holders of 8% Preferred Stock, Series A so accepted payment
in an amount equal to the  purchase  price,  and the  transfer  agent for the 8%
Preferred Stock,  Series A shall promptly  authenticate and mail to such holders
of shares of 8% Preferred  Stock,  Series A a new  certificate  representing  8%
Preferred  Stock,  Series A equal  in  number  to any  unredeemed  shares  of 8%
Preferred Stock, Series A surrendered;  provided that each share of 8% Preferred
Stock,  Series A purchased and each new  certificate  representing  shares of 8%
Preferred Stock,  Series A issued shall be in whole shares. The Corporation will
notify the holders of 8% Preferred Stock,  Series A of the results of the Change
of  Control  Offer on or as soon as  practicable  after the  Change  in  Control
Redemption Date.

            11.  Amendment of  Resolution.  The Board of Directors  reserves the
right by subsequent  amendment of this  resolution from time to time to increase
or decrease the number of shares that constitute the 8% Preferred Stock,  Series
A (but not below the number of shares  thereof  then  outstanding)  and in other
respects to amend this resolution  within the limitations  provided by law, this
resolution and the Articles of Incorporation.

            12.   Rank.  (a)  For the purposes of this resolution, any stock of
any class or classes of the Corporation shall be deemed to rank:

            (i) prior to shares of the 8% Preferred  Stock,  Series A, either as
      to dividends or upon  liquidation,  dissolution or winding up, or both, if
      the  holders of stock of such class or classes  shall be  entitled  by the
      terms thereof to the receipt of dividends or of amounts distributable upon
      liquidation,  dissolution or winding up, as the case may be, in preference
      or priority to the holders of shares of the 8% Preferred Stock, Series A;

            (ii) on a parity with shares of the 8%  Preferred  Stock,  Series A,
      either as to dividends or upon liquidation,  dissolution or winding up, or
      both,  whether  or not  the  dividend  payment  dates,  or  redemption  or
      liquidation  prices per share  thereof,  be different from those of the 8%
      Preferred  Stock,  Series  A, if the  holders  of stock  of such  class or
      classes shall be entitled by the terms thereof to the receipt of dividends
      or of amounts distributed upon liquidation,  dissolution or winding up, as
      the case may be,  in  proportion  to their  respective  dividend  rates or
      liquidation  prices,  without preference or priority of one over the other
      as  between  the  holders  of such  stock and the  holders of shares of 8%
      Preferred Stock, Series A (the term "Parity Preferred Stock" being used to
      refer to any  stock on a parity  with the  shares of 8%  Preferred  Stock,
      Series A,  either as to  dividends  or upon  liquidation,  dissolution  or
      winding up, or both, as the context may require); and

            (iii) junior to shares of the 8% Preferred  Stock,  Series A, either
      as to dividends or upon  liquidation,  dissolution or winding up, or both,
      if such class shall be Common  Stock or if the holders of the 8% Preferred
      Stock,  Series A shall be  entitled  to the  receipt  of  dividends  or of
      amounts distributable upon liquidation,  dissolution or winding up, as the
      case may be, in  preference  or  priority  to the holders of stock of such
      class or classes.

            (b) the 8%  Preferred  Stock,  Series  A  shall  rank  junior  as to
dividends and upon  liquidation  to all shares of the 7% Cumulative  Convertible
Preferred  Stock  of  the  Corporation  and  to  all  shares  of  8%  Cumulative
Convertible Preferred Stock of the Corporation.


<PAGE>


      IN WITNESS WHEREOF, the Corporation has caused this Certificate to be duly
executed in its corporate name on this 7th day of November, 1996.


Sworn to me this                    CORNERSTONE PROPERTIES INC.
___ day of November, 1996
                                    By:    __________________________
______________________                    Name:
Notary Public                             Title:

                                    By:    __________________________
Sworn to me this                          Name:
___ day of November, 1996                 Title:

- ----------------------
Notary Public


<PAGE>
                                   EXHIBIT A


         Calculation of Internal Rate of Return and Redemption Premium

For  purposes of  paragraph  7, the  Redemption  Premium (if any) shall equal an
amount such that (i) the sum of the accreted values  (determined as of such time
by using an annual  interest rate of 12%  compounded  quarterly from the date on
which the related distribution was made) of all distributions by the Corporation
to the holder(s) of 8% Preferred Stock,  Series A as of such date (including the
Redemption  Premium,  if  any)  equals  (ii)  the  sum  of the  accreted  values
(determined  as of such time by using an annual  interest rate of 12% compounded
quarterly from the date on which the related purchase was made) of all purchases
of 8% Preferred  Stock,  Series A made by the  holder(s) of 8% Preferred  Stock,
Series A. For the purpose of calculating the accreted value of  distributions or
purchases of 8% Preferred Stock,  Series A made other than on the first day of a
month, interest shall be calculated on the basis of a 30-day month and a 360-day
year. The interest rate applied on a quarterly basis for purposes of calculating
the accreted value of distributions or purchases of 8% Preferred Stock, Series A
shall be 2.873%.



EXHIBIT 20.1

            STOCKHOLDERS' AGREEMENT, dated as of November 22, 1996, by and among
CORNERSTONE PROPERTIES INC., a Nevada corporation (the "Company"),  the NEW YORK
STATE TEACHERS'  RETIREMENT  SYSTEM (the "Lead Purchaser") and the purchasers of
8% Preferred Stock (as defined below) which may become party hereto from time to
time (each  individually a "Stockholder",  and  collectively,  together with the
Lead Purchaser, the "Stockholders").


                                R E C I T A L S

            WHEREAS  the Lead  Purchaser  is  purchasing  689,655  shares of the
1,034,483  authorized shares of the 8% Cumulative  Convertible  Preferred Stock,
without par value, of the Company (the "8% Preferred  Stock"),  pursuant to that
certain  Preferred  Stock  Purchase  Agreement,  dated  November  22,  1996 (the
"Purchase Agreement"), between the Company and the Lead Purchaser; and

            WHEREAS the Company and the Lead Purchaser wish to set forth certain
agreements regarding their relationship to which they and other purchasers of 8%
Preferred Stock shall be bound.

            NOW,   THEREFORE,   in   consideration   of  the  mutual   promises,
representations,  warranties  and conditions  set forth in this  Agreement,  the
parties hereto, intending to be legally bound, hereby agree as follows:


                                   ARTICLE I

                                  DEFINITIONS

            SECTION  1.01.  Definitions  and  References.  For  purposes of this
Agreement,  in addition to the definitions set forth above and elsewhere herein,
the following terms shall have the following respective meanings:

            "Affiliate",  with  respect to any  Person,  means any other  Person
      directly or indirectly controlling,  controlled by or under common control
      with, such Person. For purposes of this definition,  "control"  (including
      with correlative  meanings,  the terms  "controlling",  "controlled by" or
      "under common control  with"),  as used with respect to any Person,  shall
      mean the  possession,  directly or  indirectly,  of the power to direct or
      cause the direction of the management and policies of such Person, whether
      through the ownership of voting securities or by contract or otherwise.

            "Approved Purchaser" shall have the meaning specified in the
      Certificate of Designations.

            "Certificate of Designations"  means the Certificate of Designations
      of the voting powers,  designation,  preferences and relative, optional or
      other special rights and  qualifications,  limitations and restrictions of
      the 8% Cumulative Convertible Preferred Stock.

            "Closing Date" means November 22, 1996.

            "Commission" means the Securities and Exchange  Commission,  and any
      successor commission or agency having similar powers.

            "Common Stock" shall mean the common stock of the Company, without
      par value.

            "Conversion  Stock" shall mean the Common Stock or other  securities
      issued on conversion of the 8% Preferred Stock.

            "Encumbrance" means any lien, security interest,  pledge,  claim, or
      option,  right of first refusal,  marital right or other  encumbrance with
      respect to any Preferred Share or share of Conversion Stock.

            "1933 Act" shall mean the Securities Act of 1933, as amended, or any
      similar federal statute, and, unless the context indicates otherwise,  the
      rules and regulations of the Commission thereunder,  all as the same shall
      be in effect at the time.

            "1934  Act"  shall  mean the  Securities  Exchange  Act of 1934,  as
      amended, or any similar federal statute, and, unless the context indicates
      otherwise, the rules and regulations of the Commission thereunder,  all as
      the same shall be in effect at the time.

            "Person" means an  individual,  a  partnership,  a joint venture,  a
      corporation,  an association, a trust, an individual retirement account or
      any other entity or organization, including a government or any department
      or agency thereof.

            "Public  Offering" means an  underwritten  public offering of equity
      securities  of the Company  pursuant an effective  registration  statement
      under the 1933 Act.

            "Qualified  Public Offering" means a Public Offering of Common Stock
      to be listed on the New York Stock Exchange in which (i) the aggregate net
      proceeds to the  Company  (after  payment of all fees and  expenses of the
      offering  and  pay-down  of any then  existing  debt  under  the Term Loan
      Agreement,  dated as of August 8, 1995,  between the Company and  Deutsche
      Bank AG  (London))  together  with the net  proceeds  of any prior  public
      offerings of Common Stock listed on the New York Stock  Exchange  equal or
      exceed $200,000,000,  (ii) the expected  distributions on shares of Common
      Stock of the  Company for the 12 months  following  the  Qualified  Public
      Offering (as certified by the treasurer or chief financial  officer of the
      Company)  divided  by the public  offering  price is less than or equal to
      7.75% and (iii) (A) if the Qualified  Public  Offering is completed in the
      calendar year 1997, the initial  public  offering price is at least $16.00
      per share,  (B) if the  Qualified  Public  Offering  is  completed  in the
      calendar year 1998, the initial  public  offering price is at least $16.50
      per share and (C) if the  Qualified  Public  Offering is  completed in the
      calendar year 1999, or thereafter,  the public  offering price is at least
      $17.00 per share;  provided,  however,  that a Qualified  Public  Offering
      shall be deemed to occur on the first  business day  following any day the
      condition set forth in (i) above and each of the  following  conditions is
      true: (x) the day is after a Public Offering and prior to January 1, 2000,
      (y) the  average  of the  closing  prices  for  shares of Common  Stock as
      reported  on the  New  York  Stock  Exchange  composite  tape  for  the 20
      consecutive  trading days  immediately  preceding such day (the "Composite
      Average")  equals or exceeds  the  applicable  minimum  price for a Public
      Offering to be considered a Qualified Public Offering at such time and (z)
      the  expected  distributions  on shares of Common  Stock for the 12 months
      following  such day (as  certified  by the  treasurer  or chief  financial
      officer of the Company)  divided by the Composite  Average is less than or
      equal to 7.75%.

            "Register,"   "registered"  and  "registration"  shall  refer  to  a
      registration effected by preparing and filing a registration  statement or
      similar  document in compliance  with the 1933 Act and the  declaration or
      ordering of effectiveness of such registration statement or document.

            "Registrable  Stock" shall mean (i) the Conversion  Stock,  (ii) any
      stock  issued as (or  issuable  upon the  conversion  or  exercise  of any
      warrant, right, option or other convertible security which is issued as) a
      dividend or other  distribution with respect to, or in exchange for, or in
      replacement of, the Conversion Stock, and (iii) any stock issued by way of
      a stock split of the  Conversion  Stock referred to in clauses (i) or (ii)
      above. For purposes of this Agreement,  any Registrable  Stock shall cease
      to be Registrable  Stock when (x) a registration  statement  covering such
      Registrable  Stock has been declared  effective and such Registrable Stock
      has been disposed of pursuant to such  effective  registration  statement,
      (y) such  Registrable  Stock is sold by a person in a transaction in which
      the rights under the  provisions of this Agreement are not assigned or (z)
      such Registrable Stock may be sold pursuant to Rule 144(k) (or any similar
      provision  then in force,  but not Rule 144A)  under the 1933 Act  without
      registration under the 1933 Act.

            "Required Amount" shall have the meaning specified in the
      Certificate of Designations.

            "Restricted  Stock"  means  all  shares  of 8%  Preferred  Stock and
      Conversion  Stock other than (a) shares that have been registered  under a
      registration  statement  pursuant to the 1933 Act, (b) shares with respect
      to which a Sale has been made in reliance on and in  accordance  with Rule
      144 or (c) shares  with  respect to which the  holder  thereof  shall have
      delivered  to the  Company  either (i) an opinion,  in form and  substance
      satisfactory to the Company, of counsel,  who shall be satisfactory to the
      Company,  or (ii) a "no action" letter from the Commission,  to the effect
      that  subsequent   transfers  of  such  shares  may  be  effected  without
      registration under the 1933 Act.

            "Rule  144" means Rule 144 (or any  successor  provision)  under the
      1933 Act.

            "Rule 144A" means Rule 144A (or any successor provision) under the
      1933 Act.

            "Sale" means any sale, assignment,  transfer,  distribution (whether
      by a partnership to any of its partners or otherwise) or other disposition
      of 8% Preferred Stock or Conversion Stock or of a participation therein.

            "Stockholder"  means each Person (other than the Company) that shall
      be a party to this Agreement, whether in connection with the execution and
      delivery  hereof  as of the  date  hereof,  pursuant  to  Section  4.11 or
      otherwise, so long as such Person shall beneficially own any shares.


                                  ARTICLE II

                              CERTAIN AGREEMENTS

            SECTION 2.01. Additional  Purchasers;  Approved Purchasers.  (a) the
Company may appoint one or more additional purchasers ("Additional  Purchasers")
of 8% Preferred  Stock,  provided that (i) each such Additional  Purchaser shall
execute this  Stockholders'  Agreement and become a party hereto (and thereafter
the term  "Stockholder"  as used  herein  shall mean the  Stockholders  and such
Additional Purchaser) and (ii) the Stockholders are given written notice of each
appointment  of an Additional  Purchaser as promptly as  practicable  after such
appointment.

            SECTION  2.02.  Board  of  Directors.  (a) For so  long as the  Lead
Purchaser holds shares of 8% Preferred  Stock with aggregate  stated value equal
to or in  excess  of  $50,000,000,  the  Lead  Purchaser  shall be  entitled  to
designate  the one  director  whom the  holders  of the 8%  Preferred  Stock are
entitled to elect to the Board of Directors  of the Company  while any shares of
8% Preferred Stock remain outstanding. Upon any failure of the Lead Purchaser to
hold shares of 8%  Preferred  Stock with  aggregate  stated value equal to or in
excess of  $50,000,000,  the right of the Lead Purchaser to designate a director
pursuant to this Section  2.02(a) shall  terminate,  without the  possibility of
revesting.

            (b) At any  time  when an  Approved  Purchaser  holds  shares  of 8%
Preferred  Stock with an  aggregate  stated  value  equal to or in excess of the
Required  Amount,  such holder shall be entitled to designate  the second of the
two  directors  whom the holders of 8% Preferred  Stock are entitled to elect at
such time.  Upon any  failure of the  Approved  Purchaser  to hold  shares of 8%
Preferred  Stock with an  aggregate  stated  value  equal to or in excess of the
Required Amount, the right of the Approved Purchaser to designate a director for
election   pursuant  to  this  Section  2.02(b)  shall  terminate   without  the
possibility of revesting.

            (c) At any time or times  when  holders  of 8%  Preferred  Stock are
entitled to elect one or more additional directors (the "Additional  Directors")
of the  Company  due to (i) the  failure of the  Company to complete a Qualified
Public  Offering on or prior to  December  31,  1999,  (ii) the  non-payment  of
dividends on the 8% Preferred  Stock for any two  consecutive  quarters or (iii)
the breach of the debt to total assets test set forth in Paragraph  5(c)(iii) of
the  Certificate  of  Designations,  the Lead  Purchaser  shall be  entitled  to
designate one  Additional  Director for election if at such time it holds shares
of 8%  Preferred  Stock with  aggregate  stated  value  equal to or in excess of
$50,000,000 and the Approved Purchaser shall be entitled to designate one of the
two  Additional  Directors  for  election if at such time it holds  shares of 8%
Preferred Stock with aggregate stated value in excess of the Required Amount.

            (d) Each  Stockholder  then  entitled  to vote for the  election  of
directors of the Company  shall vote all shares of 8%  Preferred  Stock owned or
held of record by such  holder at any  meeting  of  stockholders,  or  execute a
written  consent with respect to all shares of 8% Preferred  Stock owned or held
of record by such  Stockholder,  in favor of the election of any director  named
pursuant to Section 2.02(a), Section 2.02(b) or Section 2.02(c).

            (e) Each  Stockholder  hereby agrees that, if it is then entitled to
vote for the  election  or  removal  of  directors,  it will not vote any of its
shares of 8% Preferred  Stock in favor of the removal of any director that shall
have been  nominated  pursuant to Section  2.02(a),  Section  2.02(b) or Section
2.02(c) unless such removal shall be for Cause or the party which nominated such
director  shall have  consented to such removal in writing.  For the purposes of
this  Section  2.02(e),  "Cause"  shall mean the  commission  by a director of a
felony which,  in the opinion of a majority of the Company's Board of Directors,
is injurious to the business reputation of the Company or any subsidiary thereof
or the wilful  commission by a director of a dishonest act affecting the Company
or any subsidiary thereof.

            SECTION 2.03.  Listing.  (a)  Each Stockholder agrees to cooperate
in amending or eliminating paragraphs 5(a) and 5(b) of the Certificate of
Designations if, and to the extent, necessary in order for the Company's Common
Stock to become listed on the New York Stock Exchange.

            (b) The Company  agrees to  recommend to the holders of Common Stock
the election of  directors  designated  by the holders of 8% Preferred  Stock in
such  manner as to  preserve  as closely as may be  possible  the rights of such
holders under said  paragraphs  5(a) and 5(b) if such provisions must be amended
or eliminated pursuant to subsection 2.03(a) above.
                                  ARTICLE III

                           RESTRICTIONS ON TRANSFER

            SECTION 3.01. General  Restrictions.  No Stockholder shall, directly
or indirectly,  make or solicit any Sale of, or create, incur, solicit or assume
any  Encumbrance  with respect to, any share of 8% Preferred Stock or Conversion
Stock, except in compliance with the 1933 Act and this Agreement.

            SECTION 3.02.  Legends.  (a)  Each certificate representing shares
of 8% Preferred Stock or Conversion Stock shall, except as otherwise provided in
this Section 3.02 or in Section 3.03, be stamped or otherwise imprinted with a
legend substantially in the following form:

            "THE  SECURITIES   EVIDENCED  BY  THIS  CERTIFICATE  HAVE  NOT  BEEN
            REGISTERED  UNDER  THE  SECURITIES  ACT  OF  1933,  AS  AMENDED.  NO
            REGISTRATION  OF  TRANSFER  OF SUCH  SECURITIES  WILL BE MADE ON THE
            BOOKS OF THE ISSUER UNLESS SUCH TRANSFER IS MADE IN CONNECTION  WITH
            AN EFFECTIVE REGISTRATION STATEMENT UNDER SUCH ACT OR PURSUANT TO AN
            EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF SUCH ACT OR SUCH ACT
            DOES NOT APPLY,

            THE SECURITIES  EVIDENCED BY THIS CERTIFICATE ARE SUBJECT TO CERTAIN
            RESTRICTIONS ON TRANSFER AS SET FORTH IN A STOCKHOLDERS'  AGREEMENT,
            DATED AS OF  NOVEMBER  22,  1996,  A COPY OF WHICH IS ON FILE AT THE
            PRINCIPAL  EXECUTIVE  OFFICES  OF THE  ISSUER.  NO  REGISTRATION  OF
            TRANSFER OF SUCH  SECURITIES WILL BE MADE ON THE BOOKS OF THE ISSUER
            UNLESS AND UNTIL SUCH RESTRICTIONS SHALL HAVE BEEN COMPLIED WITH."

            (b) In the event that any shares of 8% Preferred Stock or Conversion
Stock shall cease to be Restricted  Stock,  the Company shall,  upon the written
request of the holder thereof, issue to such holder a new certificate evidencing
such  shares  without  the first  paragraph  of the legend  required  by Section
3.02(a) endorsed thereon.  In the event that any shares of 8% Preferred Stock or
Conversion  Stock shall cease to be subject to the  restrictions on transfer set
forth in this  Agreement,  the Company  shall,  upon the written  request of the
holder thereof, issue to such holder a new certificate evidencing such shares of
8%  Preferred  Stock or  Conversion  Stock  without the second  paragraph of the
legend required by Section 3.02(a).

            SECTION 3.03. Notice of Proposed  Transfer.  Each Stockholder agrees
that it will  not,  directly  or  indirectly,  make or  solicit  any Sale of, or
create,  incur or  assume  any  Encumbrance  with  respect  to,  any share of 8%
Preferred Stock or Conversion  Stock held by such Stockholder  unless,  prior to
any such action,  the holder thereof shall give written notice to the Company of
its  intention.  Each such  notice  shall  describe  the manner of the  proposed
transfer and, if requested by the Company, shall be accompanied by an opinion of
counsel satisfactory to the Company to the effect that the proposed transfer may
be effected  without  registration  under the 1933 Act,  whereupon the holder of
such stock shall be entitled to transfer such stock in accordance with the terms
of its  notice;  provided,  however,  that no such  opinion of counsel  shall be
required for a transfer to one or more partners of the  transferor  (in the case
of a transferor that is a partnership)  or to an Affiliated  corporation (in the
case of a transferor that is a corporation).  Each  certificate for 8% Preferred
Stock or Conversion  Stock  transferred  as above provided shall bear the legend
set forth in Section 3.02, except that such certificate shall not bear the first
paragraph  of such  legend  if (i)  such  transfer  is in  accordance  with  the
provisions  of Rule 144 or Rule 144A (or any other rule  permitting  public sale
without registration under the 1933 Act) or (ii) the opinion of counsel referred
to  above  is to the  further  effect  that the  transferee  and any  subsequent
transferee  (other  than an  Affiliate  of the  Company)  would be  entitled  to
transfer such  securities in a public sale without  registration  under the 1933
Act.  The  restrictions  provided  for in this  Section  3.03 shall not apply to
securities  which are not  required  to bear the first  paragraph  of the legend
prescribed by Section 3.02(a) in accordance with the provisions of that Section.

            SECTION  3.04.  Certain  Persons  to  Execute  Agreement.  (a)  Each
Stockholder  agrees that it will not directly or indirectly make any Sale of, or
create,  incur or assume  any  Encumbrance  with  respect  to,  any shares of 8%
Preferred Stock or Conversion Stock held by such Stockholder,  unless,  prior to
the  consummation of any such Sale or the creation,  incurrence or assumption of
any such Encumbrance, the Person to whom such Sale is proposed to be made or the
Person in whose favor such  Encumbrance  is proposed to be created,  incurred or
assumed (for  purposes of this Section  3.04, a  "Prospective  Transferee")  (i)
executes  and  delivers  to the  Company  an  agreement,  in form and  substance
satisfactory to the Company,  whereby such Prospective Transferee confirms that,
with respect to the shares of 8% Preferred  Stock or  Conversion  Stock that are
subject of such Sale or  Encumbrance,  it shall be deemed to be a  "Stockholder"
for the  purposes of this  Agreement  and agrees to be bound by all the terms of
this  Agreement  and (ii) unless such  Prospective  Transferee  is a  recognized
institutional  investor,   delivers  to  the  Company  an  opinion  of  counsel,
satisfactory  in form and  substance  to the  Company,  to the  effect  that the
agreement referred to above that is delivered by such Prospective  Transferee is
a legal, valid and binding obligation of such Prospective Transferee enforceable
against such  Prospective  Transferee  in  accordance  with its terms.  Upon the
execution and delivery by such Prospective  Transferee of the agreement referred
to in clause (i) of the next preceding  sentence and, if required,  the delivery
of the  opinion  of counsel  referred  to in clause  (ii) of the next  preceding
sentence,  such Prospective  Transferee shall be deemed a "Stockholder"  for the
purposes  of this  Agreement,  and shall  have the  rights and be subject to the
obligations  of a Stockholder  hereunder with respect to the shares held by such
Prospective  Transferee or in respect of which such Encumbrance  shall have been
created, incurred or assumed.

            (b) Anything in this Section 3.04 or in Section 3.03 to the contrary
notwithstanding,  the  provisions of this Section 3.04 will not be applicable to
any Sale of shares pursuant to a Public Offering.

            SECTION  3.05.  Certain  Information.  The  Company  shall  file all
reports and other information  required to be filed by Section 13 or 15(d) under
the 1934  Act,  as the case may be,  as  shall be  necessary  in order  that the
conditions to the availability of Rule 144 in connection with any Sale of shares
of Common Stock by a Stockholder shall be met.

            SECTION 3.06. Improper Sale or Encumbrance.  Any attempt to make any
Sale of, or create,  incur or assume any Encumbrance  with respect to, any share
of 8% Preferred Stock or Conversion  Stock not in compliance with this Agreement
shall be null  and  void and the  Company  shall  not  give  any  effect  in the
Company's stock records to such attempted Sale or Encumbrance.

            SECTION 3.07. Notice of Qualified Public Offering. So long as any 8%
Preferred  Stock is  outstanding,  the  Company  shall  endeavor  to notify  the
Stockholders  no less than 30 days prior to the  completion of any  contemplated
Qualified  Public  Offering.  If requested,  the Company will consult in advance
with any holder of shares of 8% Preferred  Stock with an aggregate  stated value
of at least $100 million with respect to the managing  underwriters and possible
range of public offering prices of the Common Stock.


                                  ARTICLE IV

                              REGISTRATION RIGHTS

            SECTION 4.01.  Request for Registration.

            (a) On and after the  earlier  of (i) the date  which is six  months
      after the date the registration  statement filed by the Company covering a
      Qualified Public Offering shall have become  effective,  and (ii) December
      31, 1999 if a Qualified  Public  Offering shall not have been completed on
      or prior to such date, the Stockholders of at least 25% of the Registrable
      Stock issued or issuable upon  conversion  of the 8% Preferred  Stock (the
      "Initiating  Holders")  may  request in a written  notice that the Company
      file a registration  statement  under the 1933 Act (or a similar  document
      pursuant to any other  statute  then in effect  corresponding  to the 1933
      Act) covering the  registration  of any or all  Registrable  Stock held by
      such Initiating  Holders in the manner specified in such notice,  provided
      that  there  must be  included  in such  registration  at least 25% of the
      Registrable  Stock issued or issuable upon  conversion of the 8% Preferred
      Stock (or any lesser  percentage  if the  anticipated  aggregate  offering
      proceeds would exceed $100 million). Following receipt of any notice under
      this Section 4.01(a) the Company shall (x) within 20 days notify all other
      Stockholders  of such  request in writing and (y) use its best  efforts to
      cause to be registered  under the 1933 Act all Registrable  Stock that the
      Initiating Holders and such other Stockholders have, within ten days after
      the Company has given such notice,  requested be  registered in accordance
      with the manner of disposition  specified in such notice by the Initiating
      Holders.

            (b) If the Initiating  Holders intend to have the Registrable  Stock
      distributed  by means  of an  underwritten  offering,  the  Company  shall
      include such  information in the written notice  referred to in clause (x)
      of Section 4.01(a) above.  In such event,  the right of any Stockholder to
      include its Registrable  Stock in such  registration  shall be conditioned
      upon such  Stockholder's  participation in such underwritten  offering and
      the inclusion of such Stockholder's  Registrable Stock in the underwritten
      offering  (unless  otherwise  mutually agreed by a majority in interest of
      the Initiating Holders and such Stockholder) to the extent provided below.
      All Stockholders  proposing to distribute  Registrable  Stock through such
      underwritten  offering  shall  enter  into an  underwriting  agreement  in
      customary form with the underwriter or  underwriters.  Such underwriter or
      underwriters shall be selected by a majority in interest of the Initiating
      Holders and shall be approved by the Company,  which approval shall not be
      unreasonably withheld. If any Stockholder of Registrable Stock disapproves
      of the terms of the  underwriting,  such Stockholder may elect to withdraw
      all its Registrable  Stock by written notice to the Company,  the managing
      underwriter and the Initiating Holders.  The securities so withdrawn shall
      also be withdrawn from registration.

            (c)   Notwithstanding any provision of this Agreement to the
      contrary,

                  (i)   the Company shall not be required to effect a
                        registration pursuant to this Section 4.01 during the
                        period starting with the date of filing by the Company
                        of, and ending on a date 120 days following the
                        effective date of, a registration statement pertaining
                        to a public offering of securities for the account of
                        the Company or on behalf of the selling stockholders
                        under any other registration rights agreement which the
                        Stockholder have been entitled to join pursuant to
                        Section 4.02; provided, that the Company shall actively
                                      --------
                        employ in good faith all reasonable efforts to cause
                        such registration statement to become effective as soon
                        as possible; and

                  (ii)  if the Company shall furnish to such Stockholders a
                        certificate signed by the President of the Company
                        stating that in the good faith opinion of the board of
                        directors of the Company such registration would
                        interfere with any material transaction then being
                        pursued by the Company, then the Company's obligation to
                        use its best efforts to file a registration statement
                        shall be deferred for a period not to exceed 120 days.

            (d) The Company  shall not be  obligated  to effect and pay for more
      than  one  registration  pursuant  to  this  Section  4.01  prior  to  the
      completion of a Qualified Public Offering and three registrations pursuant
      to this Section 4.01 after the completion of a Qualified  Public Offering;
      provided that a registration requested pursuant to this Section 4.01 shall
      not be deemed to have been  effected for purposes of this Section  4.01(d)
      unless (i) it has been declared  effective by the Commission,  (ii) it has
      remained  effective  for the period set forth in  Section  4.03(a),  (iii)
      Stockholders of Registrable  Stock included in such  registration have not
      withdrawn sufficient shares from such registration such that the remaining
      holders  requesting  registration  would  not have  been  able to  request
      registration  under the  provisions  of Section 4 and (iv) the offering of
      Registrable Stock pursuant to such registration is not subject to any stop
      order,  injunction or other order or requirement of the Commission  (other
      than  any  such  stop  order,  injunction,  or  other  requirement  of the
      Commission  prompted by any act or omission of Stockholders of Registrable
      Stock).

            SECTION 4.02. Incidental  Registration.  Subject to Section 4.06, if
at any time the Company  determines that it shall file a registration  statement
under the 1933 Act (other than a  registration  statement  on Form S-4 or S-8 or
filed in connection  with an exchange offer or an offering of securities  solely
to the Company's  existing  stockholders) on any form that would also permit the
registration  of the  Registrable  Stock and such  filing is to be on its behalf
and/or  on  behalf  of  selling  holders  of  its  securities  for  the  general
registration  of its Common  Stock to be sold for cash,  the Company  shall each
such time promptly give each  Stockholder  written notice of such  determination
setting forth the date on which the Company  proposes to file such  registration
statement,  which date  shall be no  earlier  than 60 days from the date of such
notice,  and advising each  Stockholder of its right to have  Registrable  Stock
included  in such  registration.  Upon the  written  request of any  Stockholder
received  by the  Company no later than 30 days after the date of the  Company's
notice,  the Company shall use its best efforts to cause to be registered  under
the 1933 Act all of the  Registrable  Stock  that each such  Stockholder  has so
requested  to be  registered.  If,  in  the  written  opinion  of  the  managing
underwriter  (or,  in the case of a  non-underwritten  offering,  in the written
opinion  of  the  Company),  the  total  amount  of  such  securities  to  be so
registered,  including such Registrable Stock, will exceed the maximum amount of
the Company's securities which can be marketed (i) at a price reasonably related
to the then current market value of such securities,  or (ii) without  otherwise
materially and adversely  affecting the entire offering,  then the Company shall
be entitled to reduce the number of shares of Registrable Stock to not less than
one-third of the total number of shares in such  offering  except in the case of
the initial firm  commitment  underwritten  public  offering of the Company,  in
which  case the  managing  underwriter  may  reduce  the  number  of  shares  of
Registrable Stock to be included in such offering to zero. Any such reduction of
Registrable  Stock shall be allocated among all such  Stockholders in proportion
(as nearly as  practicable)  to the amount of  Registrable  Stock  owned by each
Stockholder at the time of filing the registration statement.

            SECTION 4.03.  Obligations of the Company.  Whenever  required under
Section  4.01  to use  its  best  efforts  to  effect  the  registration  of any
Registrable Stock, the Company shall, as expeditiously as possible:

            (a) prepare and file with the  Commission a  registration  statement
      with respect to such  Registrable  Stock and use its best efforts to cause
      such registration  statement to become and remain effective for the period
      of the distribution contemplated thereby determined as provided hereafter;

            (b)  prepare  and  file  with the  Commission  such  amendments  and
      supplements  to such  registration  statement and the  prospectus  used in
      connection  therewith as may be necessary to comply with the provisions of
      the 1933 Act with  respect to the  disposition  of all  Registrable  Stock
      covered by such registration statement;

            (c)  furnish  to the  Stockholders  such  numbers  of  copies of the
      registration statement and the prospectus included therein (including each
      preliminary  prospectus  and any  amendments  or  supplements  thereto  in
      conformity with the  requirements of the 1933 Act and such other documents
      and information as they may reasonably request;

            (d) use its best  efforts to  register  or qualify  the  Registrable
      Stock covered by such  registration  statement under such other securities
      or blue sky laws of such jurisdictions within the United States and Puerto
      Rico as  shall  be  reasonably  appropriate  for the  distribution  of the
      Registrable  Stock  covered  by  the  registration  statement;   provided,
      however, that the Company shall not be required in connection therewith or
      as a  condition  thereto to qualify to do business in or to file a general
      consent to service of process in any jurisdiction wherein it would not but
      for the  requirements  of this  paragraph  (d) be  obligated to do so; and
      provided  further  that the Company  shall not be required to qualify such
      Registrable  Stock in any jurisdiction in which the securities  regulatory
      authority   requires  that  any  Stockholder  submit  any  shares  of  its
      Registrable Stock to the terms, provisions and restrictions of any escrow,
      lockup or similar  agreement(s) for consent to sell  Registrable  Stock in
      such jurisdiction unless such Stockholder agrees to do so;

            (e) promptly notify each Stockholder with Registrable  Stock covered
      by such  registration  statement,  at any time when a prospectus  relating
      thereto is required to be delivered  under the 1933 Act, of the  happening
      of any  event  as a  result  of  which  the  prospectus  included  in such
      registration statement, as then in effect, includes an untrue statement of
      a material  fact or omits to state any material fact required to be stated
      therein or  necessary to make the  statements  therein not  misleading  in
      light of the circumstances  under which they were made, and at the request
      of any such Stockholder promptly prepare and furnish to such Stockholder a
      reasonable  number of copies of such  supplement  to or  amendment of such
      prospectus  as may be necessary so that,  as  thereafter  delivered to the
      purchasers of such securities, such prospectus shall not include 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 in light of the circumstances under which they were made;

            (f)  furnish,   at  the  request  of  any   Stockholder   requesting
      registration of Registrable  Stock pursuant to Section 4.01, if the method
      of  distribution  is by means  of an  underwriting,  on the date  that the
      shares of  Registrable  Stock are delivered to the  underwriters  for sale
      pursuant to such  registration,  or if such Registrable Stock is not being
      sold through  underwriters,  on the date that the  registration  statement
      with respect to such shares of Registrable Stock becomes effective,  (1) a
      signed  opinion,  dated  such  date,  of  the  independent  legal  counsel
      representing the Company for the purpose of such  registration,  addressed
      to the  underwriters,  if any, and if such Registrable  Stock is not being
      sold through  underwriters,  then to the Stockholders making such request,
      as to such  matters as such  underwriters  or the  Stockholders  holding a
      majority of the Registrable  Stock included in such  registration,  as the
      case may be, may  reasonably  request and as would be  customary in such a
      transaction;  and (2) letters dated such date and the date the offering is
      priced from the independent  certified public  accountants of the Company,
      addressed to the  underwriters,  if any, and if such Registrable  Stock is
      not being sold through underwriters,  then to the Stockholders making such
      request  and, if such  accountants  refuse to deliver such letters to such
      Stockholders,  then to the Company (i) stating  that they are  independent
      certified public  accountants within the meaning of the 1933 Act and that,
      in the opinion of such  accountants,  the financial  statements  and other
      financial data of the Company  included in the  registration  statement or
      the prospectus,  or any amendment or supplement thereto, comply as to form
      in all material  respects with the applicable  accounting  requirements of
      the 1933 Act and (ii) covering  such other  financial  matters  (including
      information as to the period ending not more than five business days prior
      to the date of such letters) with respect to the  registration  in respect
      of  which  such  letter  is  being  given  as  such  underwriters  or  the
      Stockholders  holding a majority of the Registrable Stock included in such
      registration,  as the case may be, may reasonably  request and as would be
      customary in such a transaction;

            (g) enter  into  customary  agreements  (including  if the method of
      distribution is by means of an underwriting,  an underwriting agreement in
      customary form) and take such other actions as are reasonably  required in
      order to expedite or facilitate the disposition of the  Registrable  Stock
      to be so included in the registration statement;

            (h)  otherwise  use its best  efforts to comply with all  applicable
      rules  and  regulations  of the  Commission,  and  make  available  to its
      security holders, as soon as reasonably practicable, but not later than 18
      months after the effective date of the registration statement, an earnings
      statement  covering  the period of at least 12 months  beginning  with the
      first full month after the effective date of such registration  statement,
      which earnings statements shall satisfy the provisions of Section 11(a) of
      the 1933 Act; and

            (i) use its best efforts to list the  Registrable  Stock  covered by
      such registration statement with the New York Stock Exchange.

For purposes of Sections  4.03(a) and  4.03(b),  the period of  distribution  of
Registrable  Stock in a firm  commitment  underwritten  public offering shall be
deemed to extend until each  underwriter  has completed the  distribution of all
securities  purchased by it, and the period of distribution of Registrable Stock
in any other  registration  shall be deemed to extend  until the  earlier of the
sale of all Registrable Stock covered thereby and six months after the effective
date thereof.

            SECTION 4.04. Furnish Information. It shall be a condition precedent
to the  obligations of the Company to take any action pursuant to this Agreement
that the Stockholders  shall furnish to the Company such  information  regarding
themselves,  the  Registrable  Stock held by them,  and the  intended  method of
disposition of such  securities as the Company shall  reasonably  request and as
shall be required in connection with the action to be taken by the Company.

            SECTION 4.05.  Expenses of  Registration.  All expenses  incurred in
connection with each  registration  pursuant to Section 4.01 and Section 4.02 of
this Agreement, excluding underwriters' discounts and commissions, but including
without  limitation  all  registration,  filing  and  qualification  fees,  word
processing,  duplicating,  printers' and accounting fees (including the expenses
of any special audits or "cold comfort"  letters required by or incident to such
performance  and  compliance),  fees of the National  Association  of Securities
Dealers,  Inc. or listing fees,  messenger and delivery  expenses,  all fees and
expenses  of  complying  with  state  securities  or blue  sky  laws,  fees  and
disbursements of counsel for the Company,  and the fees and disbursements of one
counsel for the selling  Stockholders  (which  counsel  shall be selected by the
Stockholders  holding a majority  in  interest  of the  Registrable  Stock being
registered),  shall  be  paid  by the  Company;  provided,  however,  that  if a
registration  request pursuant to Section 4.01 of this Agreement is subsequently
withdrawn  at  the  request  of  the  Stockholders  of a  number  of  shares  of
Registrable Stock such that the remaining Stockholders  requesting  registration
would not have been able to request registration under the provisions of Section
4.01 of this Agreement,  such withdrawing  Stockholders shall bear such expenses
unless such withdrawing  Stockholders shall forfeit their right to one requested
registration pursuant to Section 4.01 of this Agreement.  The Stockholders shall
bear and pay the underwriting commissions and discounts applicable to securities
offered for their  account in  connection  with any  registrations,  filings and
qualifications made pursuant to this Agreement.

            SECTION 4.06.  Underwriting  Requirements.  In  connection  with any
underwritten  offering,  the Company shall not be required under Section 4.02 to
include shares of Registrable  Stock in such  underwritten  offering  unless the
Stockholders  holding such shares of  Registrable  Stock accept the terms of the
underwriting of such offering that have been reasonably  agreed upon between the
Company and the underwriters selected by the Company.

            SECTION 4.07. Rule 144 Information.  With a view to making available
the benefits of certain rules and regulations of the Commission which may at any
time permit the sale of the Registrable Stock to the public without registration
the Company agrees to:

            (i) use its best  efforts  to file with the  Commission  in a timely
      manner all reports and other  documents  required of the Company under the
      1934 Act; and

            (ii) furnish to each Stockholder holding Registrable Stock forthwith
      upon request a written  statement by the Company as to its compliance with
      the  reporting  requirements  of the 1934 Act,  a copy of the most  recent
      annual or  quarterly  report of the  Company,  and such other  reports and
      documents  so filed by the  Company  as such  Stockholder  may  reasonably
      request in availing  itself of any rule or  regulation  of the  Commission
      allowing  such   Stockholder  to  sell  any   Registrable   Stock  without
      registration.

            SECTION 4.08.  Indemnification.  In the event any Registrable Stock
is included in a registration statement under this Agreement:

            (a) The Company shall indemnify and hold harmless each  Stockholder,
      such Stockholder's directors and officers, each person who participates in
      the offering of such Registrable Stock, including underwriters (as defined
      in the 1933 Act), and each person,  if any, who controls such  Stockholder
      or  participating  person within the meaning of the 1933 Act,  against any
      losses,  claims,  damages or liabilities,  joint or several, to which they
      may  become  subject  under  the 1933 Act or  otherwise,  insofar  as such
      losses, claims, damages or liabilities (or proceedings in respect thereof)
      arise out of or are based on any untrue or alleged untrue statement of any
      material fact  contained in such  registration  statement on the effective
      date thereof (including any prospectus filed under Rule 424 under the 1933
      Act or any amendments or supplements 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  shall  reimburse  each  such   Stockholder,   such
      Stockholder's   directors  and  officers,  such  participating  person  or
      controlling person for any legal or other expenses  reasonably incurred by
      them (but not in excess of expenses incurred in respect of one counsel for
      all of them unless  there is an actual  conflict  of interest  between any
      indemnified  parties,  which  indemnified  parties may be  represented  by
      separate  counsel) in connection with  investigating or defending any such
      loss, claim,  damage,  liability or action;  provided,  however,  that the
      indemnity  agreement  contained in this Section 4.08(a) shall not apply to
      amounts paid in settlement of any such loss, claim,  damage,  liability or
      action if such settlement is effected  without the consent of the Company;
      provided,   further,   that  the  Company  shall  not  be  liable  to  any
      Stockholder,  such  Stockholder's  directors and  officers,  participating
      person or  controlling  person in any such case for any such loss,  claim,
      damage,  liability  or action to the  extent  that it arises  out of or is
      based upon an untrue  statement or alleged untrue statement or omission or
      alleged  omission made in  connection  with such  registration  statement,
      preliminary  prospectus,  final  prospectus or  amendments or  supplements
      thereto,  in reliance  upon and in  conformity  with  written  information
      furnished  expressly for use in connection  with such  registration by any
      such Stockholder, such Stockholder's directors and officers, participating
      person or controlling  person.  Such indemnity  shall remain in full force
      and effect  regardless  of any  investigation  made by or on behalf of any
      such Stockholder, such Stockholder's directors and officers, participating
      person or  controlling  person,  and shall  survive  the  transfer of such
      securities by such Stockholder.

            (b)  Each  Stockholder  requesting  or  joining  in  a  registration
      severally and not jointly  shall  indemnify and hold harmless the Company,
      each of its directors and officers,  each person, if any, who controls the
      Company  within  the  meaning  of the 1933  Act,  and each  agent  and any
      underwriter  for the Company  (within the meaning of the 1933 Act) against
      any losses, claims, damages or liabilities, joint or several, to which the
      Company  or any  such  director,  officer,  controlling  person,  agent or
      underwriter may become subject,  under the 1933 Act or otherwise,  insofar
      as such losses,  claims, damages or liabilities (or proceedings in respect
      thereof)  arise out of or are based upon any untrue  statement  or alleged
      untrue  statement of any  material  fact  contained  in such  registration
      statement on the effective date thereof  (including  any prospectus  filed
      under  Rule  424  under  the  1933 Act or any  amendments  or  supplements
      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 such
      registration statement,  preliminary or final prospectus, or amendments or
      supplements  thereto,  in reliance  upon and in  conformity  with  written
      information  furnished by or on behalf of such  Stockholder  expressly for
      use in connection with such registration;  and each such Stockholder shall
      reimburse any legal or other expenses  reasonably  incurred by the Company
      or any such director,  officer,  controlling person,  agent or underwriter
      (but not in excess of expenses  incurred in respect of one counsel for all
      of them  unless  there is an  actual  conflict  of  interest  between  any
      indemnified  parties,  which  indemnified  parties may be  represented  by
      separate  counsel) in connection with  investigating or defending any such
      loss, claim,  damage,  liability or action;  provided,  however,  that the
      indemnity  agreement  contained in this Section 4.08(b) shall not apply to
      amounts paid in settlement of any such loss, claim,  damage,  liability or
      action  if  such  settlement  is  effected  without  the  consent  of such
      Stockholder  (which  consent  shall  not be  unreasonably  withheld),  and
      provided further that the liability of each Stockholder hereunder shall be
      limited to the proportion of any such loss,  claim,  damage,  liability or
      expense  which is equal to the  proportion  that the net proceeds from the
      sale of the  shares  sold  by such  Stockholder  under  such  registration
      statement  bears to the total net proceeds from the sale of all securities
      sold thereunder,  but not in any event to exceed the net proceeds received
      by such  Stockholder  from the sale of  Registrable  Stock covered by such
      registration statement.

            (c)  Promptly  after  receipt  by an  indemnified  party  under this
      Section of notice of the  commencement  of any  action,  such  indemnified
      party  shall,  if a claim in  respect  thereof is to be made  against  any
      indemnifying  party under this Section,  notify the indemnifying  party in
      writing of the commencement  thereof and the indemnifying party shall have
      the right to  participate  in and assume the defense  thereof with counsel
      selected by the  indemnifying  party and  reasonably  satisfactory  to the
      indemnified party; provided, however, that an indemnified party shall have
      the right to retain its own counsel, with all fees and expenses thereof to
      be paid by such  indemnified  party, and to be apprised of all progress in
      any proceeding  the defense of which has been assumed by the  indemnifying
      party.  The  failure  to  notify an  indemnifying  party  promptly  of the
      commencement of any such action,  if and to the extent  prejudicial to its
      ability to defend such action,  shall relieve such  indemnifying  party of
      any  liability  to the  indemnified  party  under  this  Section,  but the
      omission  so to notify the  indemnifying  party will not relieve it of any
      liability that it may have to any  indemnified  party otherwise than under
      this Section.

            (d) To the extent any  indemnification  by an indemnifying  party is
      prohibited  or  limited  by  law,  the  indemnifying  party,  in  lieu  of
      indemnifying such indemnified  party,  shall contribute to the amount paid
      or payable by such indemnified  party as a result of such losses,  claims,
      damages or liabilities in such proportion as is appropriate to reflect the
      relative  fault  of  the  indemnifying  party  and  indemnified  party  in
      connection with the actions which resulted in such losses, claims, damages
      or liabilities,  as well as any other relevant  equitable  considerations.
      The relative fault of such indemnifying  party and indemnified party shall
      be determined  by reference to, among other things,  whether any action in
      question,  including  any untrue or alleged  untrue  statement of material
      fact or omission or alleged  omission to state a material  fact,  has been
      made by, or relates to information supplied by, such indemnifying party or
      indemnified party, and the parties' relative intent, knowledge,  access to
      information and opportunity to correct or prevent such action.  The amount
      paid or payable by a party as a result of the losses,  claims,  damages or
      liabilities  referred  to above  shall be deemed to  include  any legal or
      other fees or expenses  reasonably  incurred  by such party in  connection
      with any investigation or proceeding.

                  The  parties  hereto  agree  that it  would  not be  just  and
      equitable if contribution pursuant to this Section 4.08(d) were determined
      by pro rata allocation or by any other method of allocation which does not
      take  account  of  the  equitable   considerations   referred  to  in  the
      immediately   preceding   paragraph.   No  person   guilty  of  fraudulent
      misrepresentation  (within the  meaning of Section  11(f) of the 1933 Act)
      shall be  entitled to  contribution  from any person who was not guilty of
      such fraudulent misrepresentation.

            SECTION 4.09.  Lock-up.  Each Stockholder  shall, in connection with
any registration of the Company's securities, upon the request of the Company or
the underwriters managing any underwritten offering of the Company's securities,
agree in writing  not to effect any sale,  disposition  or  distribution  of any
Registrable  Stock (other than that  included in the  registration)  without the
prior written consent of the Company or such  underwriters,  as the case may be,
for such  period of time from the  effective  date of such  registration  as the
Company or the underwriters may specify;  provided,  however, that all executive
officers and  directors of the Company  shall also have agreed not to effect any
sale,   disposition  or  distribution   of  any  Registrable   Stock  under  the
circumstances and pursuant to the terms set forth in this Section 4.09.

            SECTION 4.10.  Transfer of  Registration  Rights.  The  registration
rights of any  Stockholder  under this Agreement with respect to any Registrable
Stock may be  transferred to (a) any  transferee of such  Registrable  Stock who
acquires  at  least  20% of  such  Stockholder's  shares  of  Registrable  Stock
(adjusted for stock splits and stock  consolidations after the effective date of
this Agreement) or (b) an Affiliate of such Stockholder; provided, however, that
(i) the  transferring  Stockholder  shall give the Company  written notice at or
prior  to the  time of  such  transfer  stating  the  name  and  address  of the
transferee and identifying the securities with respect to which the rights under
this  Agreement  are being  transferred;  (ii) such  transferee  shall  agree in
writing,  in form and substance  reasonably  satisfactory to the Company,  to be
bound  as  a  Stockholder  by  the  provisions  of  this  Agreement;  and  (iii)
immediately  following such transfer the further  disposition of such securities
by such transferee is restricted under the 1933 Act. Except as set forth in this
Section  4.10,  no transfer of  Registrable  Stock shall cause such  Registrable
Stock to lose such status.


                     ARTICLE V.  COVENANTS OF THE COMPANY

            The Company  covenants and agrees with the Stockholders that so long
as any of the 8% Preferred Stock is outstanding:

            Section   5.01.   Financial   Statements,   Reports,   Etc.Financial
Statements,  Reports,  Etc.  So long as the Lead  Purchaser  owns  shares  of 8%
Preferred Stock, the Company shall furnish to the Lead Purchaser, within 30 days
after the Company files with the  Commission,  copies of its annual  reports and
other  information,  documents and reports (or copies of such portions of any of
the foregoing as the Commission may by rules and regulations  prescribe) that it
is required to file with the Commission pursuant to Section 13 or 14 of the 1934
Act.

            Section 5.02.  Reserve for Conversion  SharesReserve  for Conversion
Shares.  The Company  shall at all times  reserve and keep  available out of its
authorized but unissued shares of Common Stock, for the purpose of effecting the
conversion  of the  shares  of 8%  Preferred  Stock,  such  number  of its  duly
authorized  shares  of  Common  Stock as  shall  be  sufficient  to  effect  the
conversion of the shares of 8% Preferred Stock from time to time outstanding. If
at any time the number of authorized  but unissued  shares of Common Stock shall
not be sufficient to effect the conversion of the shares of 8% Preferred  Stock,
the Company shall  forthwith take such  corporate  action as may be necessary to
increase its  authorized  but unissued  shares of Common Stock to such number of
shares as shall be  sufficient  for such  purpose.  The Company shall obtain any
authorization,  consent, approval or other action by or make any filing with any
court  or  administrative  body  that may be  required  under  applicable  state
securities  laws in connection  with the issuance of shares of Common Stock upon
conversion of the shares of 8% Preferred Stock.


                                  ARTICLE VI

                                 MISCELLANEOUS

            SECTION 6.01. Termination. The portions of this Agreement that shall
be deemed to constitute a voting agreement or a voting trust pursuant to Section
78.365  of the  Revised  Statutes  of the State of Nevada  (or  pursuant  to any
similar provision) shall terminate on the fifteenth anniversary of the execution
and delivery hereof.

            SECTION 6.02. Representations. Each of the parties hereto represents
that this Agreement has been duly  authorized,  executed and delivered by it and
constitutes its legal, valid and binding  obligation,  enforceable against it in
accordance with its terms.

            SECTION 6.03.  Specific  Performance.  The parties hereto agree that
irreparable  damage would occur in the event any provision of this Agreement was
not performed in accordance  with the terms hereof and that the parties shall be
entitled to specific  performance of the terms hereof,  in addition to any other
remedy at law or equity.

            SECTION 6.04. Amendments and Waivers. Any term of this Agreement may
be amended and the observance of any such term may be waived  (either  generally
or in a particular instance and either retroactively or prospectively) only with
the written consent of (a) the Company and (b) Stockholders holding shares of 8%
Preferred Stock  representing 80% of the then outstanding shares of 8% Preferred
Stock  held by all the  Stockholders.  Each  Stockholder  shall  be bound by any
amendment  or  waiver  authorized  by this  Section  6.04,  whether  or not such
Stockholder shall have consented thereto.

            SECTION 6.05. Benefit;  Successors and Assigns.  Except as otherwise
provided  herein,  this  Agreement  shall be binding upon and shall inure to the
benefit of the parties  hereto and their  respective  successors  and  permitted
assigns;  provided,  however, that this Agreement shall not inure to the benefit
of any Prospective  Transferee  unless such  Prospective  Transferee  shall have
complied with the terms of Section 3.03.  No  Stockholder  may assign any of its
rights  hereunder to any Person other than a transferee  that has complied  with
the  requirements  of Section 3.03 in all  respects.  Nothing in this  Agreement
either  express or implied is  intended  to confer on any person  other than the
parties  hereto and their  respective  successors  and  permitted  assigns,  any
rights, remedies or obligations under or by reason of this Agreement.

            SECTION 6.06.  Governing Law.  This Agreement shall be governed by
and construed in accordance with the laws of the State of New York.

            SECTION 6.07.  Counterparts.  This Agreement may be executed in two
or more counterparts, each of which shall be deemed an original, but all of
which together shall constitute one and the same instrument.

            SECTION 6.08.  Titles.  The titles of the Sections of this Agreement
are used for convenience only and are not to be considered in construing or
interpreting this Agreement.

            SECTION 6.09.  Notices.  Any notice required or permitted under this
Agreement  shall be in  writing  and shall be  delivered  in person or mailed by
certified or registered  mail,  return  receipt  requested,  or  transmitted  by
telecopier,  directed  to (a) the  Company at the  address  set forth  below its
signature hereof or (b) to a Stockholder at the address therefor as set forth in
the Company's records or at the address set forth below its signature hereof or,
in any such  case,  at such  other  address  or  addresses  as shall  have  been
furnished  in  writing  by such  party to the  others.  The giving of any notice
required hereunder may be waived in writing by the parties hereto.  Every notice
or other  communication  hereunder  shall be deemed  to have been duly  given or
served  on the  date on which  personally  delivered,  or on the  date  actually
received, if sent by mail or telecopier, with receipt acknowledged.


<PAGE>



================================================================================
            SECTION 6.10.  Severability.  If one or more provisions of this
Agreement are held to be unenforceable under applicable law, such provisions
shall be excluded from this Agreement and the balance of this Agreement shall be
interpreted as if such  provisions  were so excluded and shall be enforceable in
accordance with its terms.
================================================================================

            SECTION 6.11. Entire Agreement.  All prior agreements of the parties
concerning the subject matter of this Agreement are expressly superseded by this
Agreement.   This  Agreement  contains  the  entire  Agreement  of  the  parties
concerning the subject matter hereof. Any oral  representations or modifications
of this Agreement shall be of no effect.


<PAGE>

            IN WITNESS WHEREOF,  the parties hereto have executed this Agreement
as of the date first above written.



                                          CORNERSTONE PROPERTIES INC.


                                       By:
                                      Name:
                                     Title:

                                          Address For Notices:
                                          126 East 56th Street
                                          New York, NY  10022
                                   Attention:
                           Telecopier: (212) 605-7199


                                          NEW YORK STATE TEACHERS'
                                                 RETIREMENT SYSTEM


                                       By:
                                      Name:
                                     Title:


                                          Address For Notices:
                                          10 Corporate Woods Drive
                                          Albany, New York  12211-2395
                                          Attention: Wayne Schneider
                                          Telecopier:  (518) 447-2679




EXHIBIT 20.2

            STOCKHOLDERS'  AGREEMENT,  dated  as of  November  7,  1996,  by and
between CORNERSTONE  PROPERTIES INC., a Nevada corporation (the "Company"),  and
HEXALON REAL ESTATE, INC., a Delaware corporation (the "Initial Stockholder" and
individually  a  "Stockholder"  and together with any other  purchaser(s)  of 8%
Preferred  Stock Series A which may become  party hereto from time to time,  the
"Stockholders").


                                R E C I T A L S

            WHEREAS,  pursuant to an Agreement  and Plan of Merger,  dated as of
November   7,   1996   (the   "Merger   Agreement"),    between   the   Company,
CStone-Pittsburgh Trust, a Maryland business trust and a wholly owned subsidiary
of the  Company  (the  "Sub"),  Frick  Building,  Inc.,  a Delaware  corporation
("Frick"), and the Initial Stockholder,  Frick has merged with and into the Sub,
with the Sub as the surviving corporation (the "Merger");

            WHEREAS,  after giving effect to the Merger the Initial  Stockholder
will be the holder of 458,621  shares (the  "Series A Preferred  Shares") of the
Company's 8% Cumulative  Convertible Preferred Stock Series A, without par value
(the "8% Preferred Stock Series A");

            NOW,   THEREFORE,   in   consideration   of  the  mutual   promises,
representations,  warranties  and conditions  set forth in this  Agreement,  the
parties hereto, intending to be legally bound, hereby agree as follows:


                                   ARTICLE I

                                  DEFINITIONS

            SECTION  1.01.  Definitions  and  References.  For  purposes of this
Agreement,  in addition to the definitions set forth above and elsewhere herein,
the following terms shall have the following respective meanings:

            "Affiliate",  with  respect to any  Person,  means any other  Person
      directly or indirectly controlling,  controlled by or under common control
      with, such Person. For purposes of this definition,  "control"  (including
      with correlative  meanings,  the terms  "controlling",  "controlled by" or
      "under common control  with"),  as used with respect to any Person,  shall
      mean the  possession,  directly or  indirectly,  of the power to direct or
      cause the direction of the management and policies of such Person, whether
      through the ownership of voting securities or by contract or otherwise.

            "Closing Date" means November 7, 1996.

            "Commission" means the Securities and Exchange  Commission,  and any
      successor commission or agency having similar powers.

            "Common Stock" shall mean the common stock of the Company, without
      par value.

            "Conversion Stock" means the Common Stock or other securities issued
      on conversion of the 8% Preferred Stock Series A.

            "8% Preferred Stock" means the 8% Cumulative  Convertible  Preferred
      Stock of the Company, without par value.

            "Encumbrance" means any lien, security interest,  pledge,  claim, or
      option,  right of first refusal,  marital right or other  encumbrance with
      respect to any Series A Preferred Share or share of Conversion Stock.

            "Minimum Amount" means, at any time, the sum of (i) $75 million plus
      (ii) the product of .5618  multiplied by the stated value of all shares of
      8%  Preferred  Stock  issued by the  Company  prior to such time and after
      November 1, 1996.

            "1933 Act" means the  Securities  Act of 1933,  as  amended,  or any
      similar federal statute, and, unless the context indicates otherwise,  the
      rules and regulations of the Commission thereunder,  all as the same shall
      be in effect at the time.

            "1934 Act" means the Securities Exchange Act of 1934, as amended, or
      any similar federal statute,  and, unless the context indicates otherwise,
      the rules and  regulations of the Commission  thereunder,  all as the same
      shall be in effect at the time.

            "Person" means an  individual,  a  partnership,  a joint venture,  a
      corporation,  an association, a trust, an individual retirement account or
      any other entity or organization, including a government or any department
      or agency thereof.

            "Public  Offering" means an  underwritten  public offering of Common
      Stock pursuant to an effective  registration  statement under the 1933 Act
      and listed on the New York Stock Exchange.

            "Qualified Public Offering" means a Public Offering prior to January
      1, 2000 in which (i) the  aggregate  net  proceeds to the  Company  (after
      payment of all fees and expenses of the  offering)  together  with the net
      proceeds of any prior Public  Offerings equal or exceed the Minimum Amount
      and (ii) (a) if the Public  Offering is  completed  in the  calendar  year
      1997, the initial public offering price is at least $16.00 per share,  (b)
      if the Public Offering is completed in the calendar year 1998, the initial
      public  offering price is at least $16.50 per share,  or (c) if the Public
      Offering is  completed  in the  calendar  year 1999,  the  initial  public
      offering  price is at least $17.00 per share;  provided,  however,  that a
      Qualified  Public  Offering shall be deemed to occur on the first business
      day which  follows any period of 20 trading  days after a Public  Offering
      and prior to January 1, 2000,  in which the average of the closing  prices
      for shares of the Common Stock as reported on the New York Stock  Exchange
      composite tape equals or exceeds the applicable minimum price for a Public
      Offering to be considered a Qualified Public Offering at such time.

            "Register,"   "registered"  and  "registration"  shall  refer  to  a
      registration effected by preparing and filing a registration  statement or
      similar  document in compliance  with the 1933 Act and the  declaration or
      ordering of effectiveness of such registration statement or document.

            "Registrable  Stock" shall mean (i) the Conversion  Stock,  (ii) any
      common stock issued as (or issuable upon the conversion or exercise of any
      warrant, right, option or other convertible security which is issued as) a
      dividend or other  distribution with respect to, or in exchange for, or in
      replacement of, the Conversion Stock, and (iii) any common stock issued by
      way of a stock split of the Conversion  Stock referred to in clause (i) or
      (ii) above.  For purposes of this Agreement,  any Registrable  Stock shall
      cease to be Registrable Stock when (x) a registration  statement  covering
      such  Registrable  Stock has been declared  effective and such Registrable
      Stock  has  been  disposed  of  pursuant  to such  effective  registration
      statement, (y) such Registrable Stock is sold by a Person in a transaction
      in which  the  rights  under  the  provisions  of this  Agreement  are not
      assigned or (z) such Registrable Stock may be sold pursuant to Rule 144(k)
      (or any similar provision then in force, but not Rule 144A) under the 1933
      Act without registration under the 1933 Act.

            "Restricted  Stock" means all shares of 8% Preferred  Stock Series A
      and Conversion Stock other than (a) shares that have been registered under
      a registration statement pursuant to the 1933 Act, (b) shares with respect
      to which a Sale has been made in reliance on and in  accordance  with Rule
      144 or (c) shares  with  respect to which the  holder  thereof  shall have
      delivered  to the  Company  either (i) an opinion,  in form and  substance
      satisfactory to the Company, of counsel,  who shall be satisfactory to the
      Company,  or (ii) a "no action" letter from the Commission,  to the effect
      that  subsequent   transfers  of  such  shares  may  be  effected  without
      registration under the 1933 Act.

            "Rule  144" means Rule 144 (or any  successor  provision)  under the
      1933 Act.

            "Rule 144 Transaction" means any Sale of 8% Preferred Stock Series A
      or  Conversion  Shares  made in  reliance on Rule 144 (as in effect on the
      date hereof) which complies with  paragraphs (d), (e), (f) and (g) thereof
      (as in effect on the date  hereof),  regardless  of whether at the time of
      such sale the seller is entitled to rely upon paragraph (k) of Rule 144 in
      connection with the Sale of such shares.

            "Rule 144A" means Rule 144A (or any successor provision) under the
      1933 Act.

            "Sale" means any sale, assignment,  transfer,  distribution (whether
      by a partnership to any of its partners or otherwise) or other disposition
      of 8% Preferred  Stock Series A or Conversion  Stock or of a participation
      therein.

            "Stockholder"  means each Person (other than the Company) that shall
      be a party to this Agreement, whether in connection with the execution and
      delivery  hereof  as of the  date  hereof,  pursuant  to  Section  4.11 or
      otherwise, so long as such Person shall beneficially own any shares of the
      8% Preferred Stock Series A.


                                  ARTICLE II

                              CERTAIN AGREEMENTS

            SECTION  2.01.  Board of  Directors.  Prior to the  completion  of a
Public  Offering in which the  aggregate  net  proceeds  to the  Company  (after
payment of all fees and expenses of the offering)  equal or exceed  $75,000,000,
if  requested  by the holders of a majority of the stated value of all shares of
8%  Preferred  Stock  Series A  outstanding  at such  time,  the  Company  shall
recommend the election of one director  chosen by such holders to the holders of
Common Stock.

            SECTION 2.02. Limitation on Issuance of 8% Preferred Stock Series A.
So long as any 8% Preferred Stock Series A is outstanding,  the aggregate stated
value of all shares of 8% Preferred Stock issued by the Company shall not exceed
$150,000,000.

            SECTION 2.03. Notice of Public Offering. So long as any 8% Preferred
Stock  Series A is  outstanding,  the  Company  shall  endeavor  to  notify  the
Stockholders  no less than 30 days or more than 60 days prior to the  completion
of any contemplated Public Offering. Within 15 days thereafter, each Stockholder
shall inform the Company  whether they intend to convert the 8% Preferred  Stock
Series A to Common Stock prior to the completion of the Public Offering.


                                  ARTICLE III

                           RESTRICTIONS ON TRANSFER

            SECTION 3.01. General  Restrictions.  No Stockholder shall, directly
or indirectly,  make or solicit any Sale of, or create, incur, solicit or assume
any  Encumbrance  with respect to, any share of 8%  Preferred  Stock Series A or
Conversion Stock, except in compliance with the 1933 Act and this Agreement.

            SECTION 3.02. Legends.  (a) Each certificate  representing shares of
8% Preferred  Stock  Series A or  Conversion  Stock  shall,  except as otherwise
provided  in this  Section  3.02 or in Section  3.03,  be  stamped or  otherwise
imprinted with a legend substantially in the following form:

            "THE  SECURITIES   EVIDENCED  BY  THIS  CERTIFICATE  HAVE  NOT  BEEN
            REGISTERED  UNDER  THE  SECURITIES  ACT  OF  1933,  AS  AMENDED.  NO
            REGISTRATION  OF  TRANSFER  OF SUCH  SECURITIES  WILL BE MADE ON THE
            BOOKS OF THE ISSUER UNLESS SUCH TRANSFER IS MADE IN CONNECTION  WITH
            AN EFFECTIVE REGISTRATION STATEMENT UNDER SUCH ACT OR PURSUANT TO AN
            EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF SUCH ACT OR SUCH ACT
            DOES NOT APPLY.

            THE SECURITIES  EVIDENCED BY THIS CERTIFICATE ARE SUBJECT TO CERTAIN
            RESTRICTIONS ON TRANSFER AS SET FORTH IN A STOCKHOLDERS'  AGREEMENT,
            DATED  AS OF  NOVEMBER  7,  1996,  A COPY OF WHICH IS ON FILE AT THE
            PRINCIPAL  EXECUTIVE  OFFICES  OF THE  ISSUER.  NO  REGISTRATION  OF
            TRANSFER OF SUCH  SECURITIES WILL BE MADE ON THE BOOKS OF THE ISSUER
            UNLESS AND UNTIL SUCH RESTRICTIONS SHALL HAVE BEEN COMPLIED WITH."

            (b) In the event that any shares of 8%  Preferred  Stock Series A or
Conversion Stock shall cease to be Restricted Stock, the Company shall, upon the
written  request of the holder  thereof,  issue to such holder a new certificate
evidencing  such shares  without the first  paragraph of the legend  required by
Section 3.02(a) endorsed  thereon.  In the event that any shares of 8% Preferred
Stock Series A or Conversion Stock shall cease to be subject to the restrictions
on transfer set forth in this  Agreement,  the Company  shall,  upon the written
request of the holder thereof, issue to such holder a new certificate evidencing
such shares of 8%  Preferred  Stock  Series A or  Conversion  Stock  without the
second paragraph of the legend required by Section 3.02(a).

            SECTION 3.03. Notice of Proposed  Transfer.  Each Stockholder agrees
that it will  not,  directly  or  indirectly,  make or  solicit  any Sale of, or
create,  incur or  assume  any  Encumbrance  with  respect  to,  any share of 8%
Preferred Stock Series A or Conversion  Stock held by such  Stockholder  unless,
prior to any such action,  the holder  thereof shall give written  notice to the
Company of its  intention.  Each such notice  shall  describe  the manner of the
proposed  transfer and, if requested by the Company,  shall be accompanied by an
opinion of counsel  satisfactory  to the Company to the effect that the proposed
transfer may be effected without  registration under the 1933 Act, whereupon the
holder of such stock shall be entitled to transfer such stock in accordance with
the terms of its  notice;  provided,  however,  that no such  opinion of counsel
shall be required for a transfer to one or more partners of the  transferor  (in
the case of a transferor that is a partnership) or to an Affiliated  corporation
(in the case of a transferor  that is a  corporation).  Each  certificate for 8%
Preferred Stock Series A or Conversion Stock transferred as above provided shall
bear the legend set forth in Section 3.02,  except that such  certificate  shall
not  bear  the  first  paragraph  of such  legend  if (i)  such  transfer  is in
accordance  with the  provisions  of Rule 144 or Rule  144A (or any  other  rule
permitting  public  sale  without  registration  under the 1933 Act) or (ii) the
opinion  of  counsel  referred  to  above  is to the  further  effect  that  the
transferee  and  any  subsequent  transferee  (other  than an  Affiliate  of the
Company) would be entitled to transfer such  securities in a public sale without
registration  under the 1933 Act. The restrictions  provided for in this Section
3.03  shall not apply to  securities  which are not  required  to bear the first
paragraph of the legend  prescribed by Section  3.02(a) in  accordance  with the
provisions of that Section.

            SECTION  3.04.  Certain  Persons  to  Execute  Agreement.  (a)  Each
Stockholder  agrees that it will not directly or indirectly make any Sale of, or
create,  incur or assume  any  Encumbrance  with  respect  to,  any shares of 8%
Preferred Stock Series A or Conversion Stock held by such  Stockholder,  unless,
prior  to the  consummation  of any such  Sale or the  creation,  incurrence  or
assumption of any such Encumbrance,  the Person to whom such Sale is proposed to
be made or the Person in whose favor such Encumbrance is proposed to be created,
incurred  or  assumed  (for  purposes  of  this  Section  3.04,  a  "Prospective
Transferee") (i) executes and delivers to the Company an agreement,  in form and
substance  satisfactory  to the  Company,  whereby such  Prospective  Transferee
confirms  that,  with  respect to the shares of 8%  Preferred  Stock Series A or
Conversion  Stock that are the subject of such Sale or Encumbrance,  it shall be
deemed to be a "Stockholder" for the purposes of this Agreement and agrees to be
bound  by all the  terms of this  Agreement  and (ii)  unless  such  Prospective
Transferee is a recognized  institutional  investor,  delivers to the Company an
opinion of counsel,  satisfactory  in form and substance to the Company,  to the
effect  that  the  agreement  referred  to  above  that  is  delivered  by  such
Prospective  Transferee  is a  legal,  valid  and  binding  obligation  of  such
Prospective  Transferee  enforceable  against  such  Prospective  Transferee  in
accordance with its terms.  Upon the execution and delivery by such  Prospective
Transferee  of the  agreement  referred  to in clause (i) of the next  preceding
sentence and, if required, the delivery of the opinion of counsel referred to in
clause (ii) of the next preceding sentence, such Prospective Transferee shall be
deemed a "Stockholder"  for the purposes of this  Agreement,  and shall have the
rights and be subject to the obligations of a Stockholder hereunder with respect
to the shares held by such  Prospective  Transferee  or in respect of which such
Encumbrance shall have been created, incurred or assumed.


<PAGE>


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            (b) Anything in this Section 3.04 or in Section 3.03 to the contrary
notwithstanding,  the  provisions of this Section 3.04 will not be applicable to
(i) any Sale of  shares  of 8%  Preferred  Stock  Series A or  Conversion  Stock
pursuant to a Public  Offering or (ii) any Sale of shares of 8% Preferred  Stock
Series A or  Conversion  Stock in a Rule 144  Transaction  which is  consummated
after the date of a Public Offering.

            SECTION  3.05.  Certain  Information.  The  Company  shall  file all
reports and other information  required to be filed by Section 13 or 15(d) under
the 1934  Act,  as the case may be,  as  shall be  necessary  in order  that the
conditions to the availability of Rule 144 in connection with any Sale of shares
of Common Stock by a Stockholder shall be met.

            SECTION 3.06. Improper Sale or Encumbrance.  Any attempt to make any
Sale of, or create,  incur or assume any Encumbrance  with respect to, any share
of 8% Preferred  Stock Series A or Conversion  Stock not in compliance with this
Agreement  shall be null and void and the  Company  shall not give any effect in
the Company's stock records to such attempted Sale or Encumbrance.


                                  ARTICLE IV

                              REGISTRATION RIGHTS

            SECTION 4.01. Request for Registration. (a) On and after the earlier
of (i) the date which is six months  after the date the  registration  statement
filed by the Company covering a Public Offering shall have become effective, and
(ii)  December  31,  2000 if a  Qualified  Public  Offering  shall not have been
completed on or prior to such date, the  Stockholders  of all of the Registrable
Stock issued or issuable upon conversion of the 8% Preferred Stock Series A (the
"Initiating  Holders")  may request in a written  notice that the Company file a
registration statement under the 1933 Act (or a similar document pursuant to any
other  statute  then in  effect  corresponding  to the 1933  Act)  covering  the
registration of any or all Registrable Stock held by such Initiating  Holders in
the manner  specified  in such notice,  provided  that there must be included in
such registration at least 100% of the Registrable Stock issued or issuable upon
conversion of the 8% Preferred  Stock Series A (or any lesser  percentage if the
anticipated  aggregate  offering  proceeds from the Registrable  Stock and other
shares  to be  offered  under  such  registration  statement  would  exceed  $75
million). Following receipt of any notice under this Section 4.01(a) the Company
shall (x)  within 20 days  notify  all other  Stockholders  of such  request  in
writing and (y) use its best  efforts to cause to be  registered  under the 1933
Act  all  Registrable   Stock  that  the  Initiating   Holders  and  such  other
Stockholders  have,  within ten days after the  Company  has given such  notice,
requested be registered in accordance  with the manner of disposition  specified
in such notice by the Initiating Holders.

            (b) If the Initiating  Holders intend to have the Registrable  Stock
distributed by means of an underwritten offering, the Company shall include such
information in the written notice  referred to in clause (x) of Section  4.01(a)
above.  In such event,  the right of any  Stockholder to include its Registrable
Stock  in  such  registration  shall  be  conditioned  upon  such  Stockholder's
participation  in  such   underwritten   offering  and  the  inclusion  of  such
Stockholder's  Registrable Stock in the underwritten  offering (unless otherwise
mutually  agreed by a majority in interest  of the  Initiating  Holders and such
Stockholder)  to the  extent  provided  below.  All  Stockholders  proposing  to
distribute Registrable Stock through such underwritten offering shall enter into
an   underwriting   agreement  in  customary   form  with  the   underwriter  or
underwriters.  Such underwriter or underwriters  shall be selected by a majority
in interest  of the  Initiating  Holders  and shall be approved by the  Company,
which  approval  shall  not be  unreasonably  withheld.  If any  Stockholder  of
Registrable Stock disapproves of the terms of the underwriting, such Stockholder
may  elect to  withdraw  all its  Registrable  Stock by  written  notice  to the
Company,  the managing underwriter and the Initiating Holders. The securities so
withdrawn shall also be withdrawn from registration.

            (c)   Notwithstanding any provision of this Agreement to the
contrary,

            (i) the  Company  shall not be  required  to  effect a  registration
      pursuant to this Section 4.01 during the period  starting with the date of
      filing by the  Company  of,  and ending on a date 120 days  following  the
      effective  date  of,  a  registration  statement  pertaining  to a  public
      offering of securities  for the account of the Company or on behalf of the
      selling  stockholders under any other registration  rights agreement which
      the  Stockholders  have been  entitled to join  pursuant to Section  4.02;
      provided  that  the  Company  shall  actively  employ  in good  faith  all
      reasonable  efforts  to  cause  such  registration   statement  to  become
      effective as soon as possible; and

            (ii) if the Company shall furnish to such Stockholders a certificate
      signed by the  President  of the  Company  stating  that in the good faith
      opinion of the board of directors of the Company such  registration  would
      interfere with any material transaction then being pursued by the Company,
      then  the  Company's  obligation  to  use  its  best  efforts  to  file  a
      registration  statement  shall be deferred  for a period not to exceed 120
      days.

            (d) The Company  shall not be  obligated  to effect and pay for more
than one registration pursuant to this Section 4.01 prior to the completion of a
Public Offering and more than three registrations  pursuant to this Section 4.01
after  the  completion  of a  Public  Offering;  provided  that  a  registration
requested  pursuant  to this  Section  4.01  shall  not be  deemed  to have been
effected for purposes of this Section  4.01(d)  unless (i) it has been  declared
effective by the Commission,  (ii) it has remained  effective for the period set
forth in Section 4.03(a),  (iii)  Stockholders of Registrable  Stock included in
such  registration  have not withdrawn  sufficient shares from such registration
such that the remaining holders requesting registration would not have been able
to request  registration under the provisions of Section 4 and (iv) the offering
of Registrable  Stock pursuant to such  registration  is not subject to any stop
order,  injunction or other order or requirement  of the Commission  (other than
any such stop order, injunction, or other requirement of the Commission prompted
by any act or omission of Stockholders of Registrable Stock).

            SECTION 4.02. Incidental  Registration.  Subject to Section 4.06, if
at any time the Company  determines that it shall file a registration  statement
under the 1933 Act (other than a  registration  statement  on Form S-4 or S-8 or
filed in connection  with an exchange offer or an offering of securities  solely
to the Company's  existing  stockholders) on any form that would also permit the
registration  of the  Registrable  Stock and such  filing is to be on its behalf
and/or  on  behalf  of  selling  holders  of  its  securities  for  the  general
registration  of its common  stock to be sold for cash,  the Company  shall each
such time promptly give each  Stockholder  written notice of such  determination
setting forth the date on which the Company  proposes to file such  registration
statement,  which date  shall be no  earlier  than 60 days from the date of such
notice,  and advising each  Stockholder of its right to have  Registrable  Stock
included  in such  registration.  Upon the  written  request of any  Stockholder
received  by the  Company no later than 30 days after the date of the  Company's
notice,  the Company shall use its best efforts to cause to be registered  under
the 1933 Act all of the  Registrable  Stock  that each such  Stockholder  has so
requested  to be  registered.  If,  in  the  written  opinion  of  the  managing
underwriter  (or,  in the case of a  non-underwritten  offering,  in the written
opinion  of  the  Company),  the  total  amount  of  such  securities  to  be so
registered,  including such Registrable Stock, will exceed the maximum amount of
the Company's securities which can be marketed (i) at a price reasonably related
to the then current market value of such securities,  or (ii) without  otherwise
materially and adversely  affecting the entire offering,  then the Company shall
be entitled to reduce the number of shares of Registrable Stock to not less than
one-third of the total number of shares in such  offering  except in the case of
the initial firm  commitment  underwritten  public  offering of the Company,  in
which  case the  managing  underwriter  may  reduce  the  number  of  shares  of
Registrable  Stock to be included in such offering to zero. Such reduction shall
be  allocated   among  all  such   Stockholders  in  proportion  (as  nearly  as
practicable) to the amount of Registrable Stock owned by each Stockholder at the
time of filing the registration statement.

            SECTION 4.03.  Obligations of the Company.  Whenever  required under
Section  4.01  to use  its  best  efforts  to  effect  the  registration  of any
Registrable Stock, the Company shall, as expeditiously as possible:

            (a) prepare and file with the  Commission a  registration  statement
      with respect to such  Registrable  Stock and use its best efforts to cause
      such registration  statement to become and remain effective for the period
      of the distribution contemplated thereby determined as provided hereafter;

            (b)  prepare  and  file  with the  Commission  such  amendments  and
      supplements  to such  registration  statement and the  prospectus  used in
      connection  therewith as may be necessary to comply with the provisions of
      the 1933 Act with  respect to the  disposition  of all  Registrable  Stock
      covered by such registration statement;

            (c)  furnish  to the  Stockholders  such  numbers  of  copies of the
      registration statement and the prospectus included therein (including each
      preliminary  prospectus  and any  amendments  or  supplements  thereto  in
      conformity with the  requirements of the 1933 Act and such other documents
      and information as they may reasonably request);

            (d) use its best  efforts to  register  or qualify  the  Registrable
      Stock covered by such  registration  statement under such other securities
      or blue sky laws of such jurisdictions within the United States and Puerto
      Rico as  shall  be  reasonably  appropriate  for the  distribution  of the
      Registrable  Stock  covered  by  the  registration  statement;   provided,
      however, that the Company shall not be required in connection therewith or
      as a  condition  thereto to qualify to do business in or to file a general
      consent to service of process in any jurisdiction wherein it would not but
      for the  requirements  of this  paragraph  (d) be  obligated to do so; and
      provided  further  that the Company  shall not be required to qualify such
      Registrable  Stock in any jurisdiction in which the securities  regulatory
      authority   requires  that  any  Stockholder  submit  any  shares  of  its
      Registrable Stock to the terms, provisions and restrictions of any escrow,
      lockup or similar  agreement(s) for consent to sell  Registrable  Stock in
      such jurisdiction unless such Stockholder agrees to do so;

            (e) promptly notify each Stockholder with Registrable  Stock covered
      by such  registration  statement,  at any time when a prospectus  relating
      thereto is required to be delivered  under the 1933 Act, of the  happening
      of any  event  as a  result  of  which  the  prospectus  included  in such
      registration statement, as then in effect, includes an untrue statement of
      a material  fact or omits to state any material fact required to be stated
      therein or  necessary to make the  statements  therein not  misleading  in
      light of the circumstances  under which they were made, and at the request
      of any such Stockholder promptly prepare and furnish to such Stockholder a
      reasonable  number of copies of such  supplement  to or  amendment of such
      prospectus  as may be necessary so that,  as  thereafter  delivered to the
      purchasers of such securities, such prospectus shall not include 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 in light of the circumstances under which they were made;

            (f)  furnish,   at  the  request  of  any   Stockholder   requesting
      registration of Registrable  Stock pursuant to Section 4.01, if the method
      of  distribution  is by means  of an  underwriting,  on the date  that the
      shares of  Registrable  Stock are delivered to the  underwriters  for sale
      pursuant to such  registration,  or if such Registrable Stock is not being
      sold through  underwriters,  on the date that the  registration  statement
      with respect to such shares of Registrable Stock becomes effective,  (1) a
      signed  opinion,  dated  such  date,  of  the  independent  legal  counsel
      representing the Company for the purpose of such  registration,  addressed
      to the  underwriters,  if any, and if such Registrable  Stock is not being
      sold through  underwriters,  then to the Stockholders making such request,
      as to such  matters as such  underwriters  or the  Stockholders  holding a
      majority of the Registrable  Stock included in such  registration,  as the
      case may be, may  reasonably  request and as would be  customary in such a
      transaction;  and (2) letters dated such date and the date the offering is
      priced from the independent  certified public  accountants of the Company,
      addressed to the  underwriters,  if any, and if such Registrable  Stock is
      not being sold through underwriters,  then to the Stockholders making such
      request  and, if such  accountants  refuse to deliver such letters to such
      Stockholders,  then to the Company (i) stating  that they are  independent
      certified public  accountants within the meaning of the 1933 Act and that,
      in the opinion of such  accountants,  the financial  statements  and other
      financial data of the Company  included in the  registration  statement or
      the prospectus,  or any amendment or supplement thereto, comply as to form
      in all material  respects with the applicable  accounting  requirements of
      the 1933 Act and (ii) covering  such other  financial  matters  (including
      information as to the period ending not more than five business days prior
      to the date of such letters) with respect to the  registration  in respect
      of  which  such  letter  is  being  given  as  such  underwriters  or  the
      Stockholders  holding a majority of the Registrable Stock included in such
      registration,  as the case may be, may reasonably  request and as would be
      customary in such a transaction;

            (g) enter  into  customary  agreements  (including  if the method of
      distribution is by means of an underwriting,  an underwriting agreement in
      customary form) and take such other actions as are reasonably  required in
      order to expedite or facilitate the disposition of the  Registrable  Stock
      to be so included in the registration statement;

            (h)  otherwise  use its best  efforts to comply with all  applicable
      rules  and  regulations  of the  Commission,  and  make  available  to its
      security holders, as soon as reasonably practicable, but not later than 18
      months after the effective date of the registration statement, an earnings
      statement  covering  the period of at least 12 months  beginning  with the
      first full month after the effective date of such registration  statement,
      which earnings statements shall satisfy the provisions of Section 11(a) of
      the 1933 Act; and

            (i) use its best efforts to list the  Registrable  Stock  covered by
      such registration statement with the New York Stock Exchange.

For purposes of Sections  4.03(a) and  4.03(b),  the period of  distribution  of
Registrable  Stock in a firm  commitment  underwritten  public offering shall be
deemed to extend until each  underwriter  has completed the  distribution of all
securities  purchased by it, and the period of distribution of Registrable Stock
in any other  registration  shall be deemed to extend  until the  earlier of the
sale of all Registrable Stock covered thereby and six months after the effective
date thereof.

            SECTION 4.04. Furnish Information. It shall be a condition precedent
to the  obligations of the Company to take any action pursuant to this Agreement
that the Stockholders  shall furnish to the Company such  information  regarding
themselves,  the  Registrable  Stock held by them,  and the  intended  method of
disposition of such  securities as the Company shall  reasonably  request and as
shall be required in connection with the action to be taken by the Company.

            SECTION 4.05.  Expenses of  Registration.  All expenses  incurred in
connection with each  registration  pursuant to Section 4.01 and Section 4.02 of
this Agreement, excluding underwriters' discounts and commissions, but including
without  limitation  all  registration,  filing  and  qualification  fees,  word
processing,  duplicating,  printers' and accounting fees (including the expenses
of any special audits or "cold comfort"  letters required by or incident to such
performance  and  compliance),  fees of the National  Association  of Securities
Dealers,  Inc. or listing fees,  messenger and delivery  expenses,  all fees and
expenses  of  complying  with  state  securities  or blue  sky  laws,  fees  and
disbursements of counsel for the Company,  and the fees and disbursements of one
counsel for the selling  Stockholders  (which  counsel  shall be selected by the
Stockholders  holding a majority  in  interest  of the  Registrable  Stock being
registered),  shall  be  paid  by the  Company;  provided,  however,  that  if a
registration  request pursuant to Section 4.01 of this Agreement is subsequently
withdrawn  at  the  request  of  the  Stockholders  of a  number  of  shares  of
Registrable Stock such that the remaining Stockholders  requesting  registration
would not have been able to request registration under the provisions of Section
4.01 of this Agreement,  such withdrawing  Stockholders shall bear such expenses
unless such withdrawing  Stockholders shall forfeit their right to one requested
registration pursuant to Section 4.01 of this Agreement.  The Stockholders shall
bear and pay the underwriting commissions and discounts applicable to securities
offered for their  account in  connection  with any  registrations,  filings and
qualifications made pursuant to this Agreement.

            SECTION 4.06.  Underwriting  Requirements.  In  connection  with any
underwritten  offering,  the Company shall not be required under Section 4.02 to
include shares of Registrable  Stock in such  underwritten  offering  unless the
Stockholders  holding such shares of  Registrable  Stock accept the terms of the
underwriting of such offering that have been reasonably  agreed upon between the
Company and the underwriters selected by the Company.

            SECTION 4.07. Rule 144 Information.  With a view to making available
the benefits of certain rules and regulations of the Commission which may at any
time permit the sale of the Registrable Stock to the public without registration
the Company agrees to:

            (i) use its best  efforts  to file with the  Commission  in a timely
      manner all reports and other  documents  required of the Company under the
      1934 Act; and

            (ii) furnish to each Stockholder holding Registrable Stock forthwith
      upon request a written  statement by the Company as to its compliance with
      the  reporting  requirements  of the 1934 Act,  a copy of the most  recent
      annual or  quarterly  report of the  Company,  and such other  reports and
      documents  so filed by the  Company  as such  Stockholder  may  reasonably
      request in availing  itself of any rule or  regulation  of the  Commission
      allowing  such   Stockholder  to  sell  any   Registrable   Stock  without
      registration.

            SECTION 4.08.  Indemnification.  In the event any Registrable Stock
is included in a registration statement under this Agreement:

            (a) The Company shall indemnify and hold harmless each  Stockholder,
      such Stockholder's directors and officers, each person who participates in
      the offering of such Registrable Stock, including underwriters (as defined
      in the 1933 Act), and each person,  if any, who controls such  Stockholder
      or  participating  person within the meaning of the 1933 Act,  against any
      losses,  claims,  damages or liabilities,  joint or several, to which they
      may  become  subject  under  the 1933 Act or  otherwise,  insofar  as such
      losses, claims, damages or liabilities (or proceedings in respect thereof)
      arise out of or are based on any untrue or alleged untrue statement of any
      material fact  contained in such  registration  statement on the effective
      date thereof (including any prospectus filed under Rule 424 under the 1933
      Act or any amendments or supplements 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  shall  reimburse  each  such   Stockholder,   such
      Stockholder's   directors  and  officers,  such  participating  person  or
      controlling person for any legal or other expenses  reasonably incurred by
      them (but not in excess of expenses incurred in respect of one counsel for
      all of them unless  there is an actual  conflict  of interest  between any
      indemnified  parties,  which  indemnified  parties may be  represented  by
      separate  counsel) in connection with  investigating or defending any such
      loss, claim,  damage,  liability or action;  provided,  however,  that the
      indemnity  agreement  contained in this Section 4.08(a) shall not apply to
      amounts paid in settlement of any such loss, claim,  damage,  liability or
      action if such settlement is effected  without the consent of the Company;
      provided  further that the Company shall not be liable to any Stockholder,
      such  Stockholder's  directors  and  officers,   participating  person  or
      controlling  person in any such  case for any such  loss,  claim,  damage,
      liability  or action to the extent  that it arises out of or is based upon
      an untrue  statement  or alleged  untrue  statement or omission or alleged
      omission made in connection with such registration statement,  preliminary
      prospectus,  final  prospectus or amendments or  supplements  thereto,  in
      reliance  upon  and  in  conformity  with  written  information  furnished
      expressly  for  use in  connection  with  such  registration  by any  such
      Stockholder,  such  Stockholder's  directors and  officers,  participating
      person or controlling  person.  Such indemnity  shall remain in full force
      and effect  regardless  of any  investigation  made by or on behalf of any
      such Stockholder, such Stockholder's directors and officers, participating
      person or  controlling  person,  and shall  survive  the  transfer of such
      securities by such Stockholder.

            (b)  Each  Stockholder  requesting  or  joining  in  a  registration
      severally and not jointly  shall  indemnify and hold harmless the Company,
      each of its directors and officers,  each person, if any, who controls the
      Company  within  the  meaning  of the 1933  Act,  and each  agent  and any
      underwriter  for the Company  (within the meaning of the 1933 Act) against
      any losses, claims, damages or liabilities, joint or several, to which the
      Company  or any  such  director,  officer,  controlling  person,  agent or
      underwriter may become subject,  under the 1933 Act or otherwise,  insofar
      as such losses,  claims, damages or liabilities (or proceedings in respect
      thereof)  arise out of or are based upon any untrue  statement  or alleged
      untrue  statement of any  material  fact  contained  in such  registration
      statement on the effective date thereof  (including  any prospectus  filed
      under  Rule  424  under  the  1933 Act or any  amendments  or  supplements
      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 such
      registration statement,  preliminary or final prospectus, or amendments or
      supplements  thereto,  in reliance  upon and in  conformity  with  written
      information  furnished by or on behalf of such  Stockholder  expressly for
      use in connection with such registration;  and each such Stockholder shall
      reimburse any legal or other expenses  reasonably  incurred by the Company
      or any such director,  officer,  controlling person,  agent or underwriter
      (but not in excess of expenses  incurred in respect of one counsel for all
      of them  unless  there is an  actual  conflict  of  interest  between  any
      indemnified  parties,  which  indemnified  parties may be  represented  by
      separate  counsel) in connection with  investigating or defending any such
      loss, claim,  damage,  liability or action;  provided,  however,  that the
      indemnity  agreement  contained in this Section 4.08(b) shall not apply to
      amounts paid in settlement of any such loss, claim,  damage,  liability or
      action  if  such  settlement  is  effected  without  the  consent  of such
      Stockholder  (which  consent  shall  not be  unreasonably  withheld),  and
      provided further that the liability of each Stockholder hereunder shall be
      limited to the proportion of any such loss,  claim,  damage,  liability or
      expense  which is equal to the  proportion  that the net proceeds from the
      sale of the  shares  sold  by such  Stockholder  under  such  registration
      statement  bears to the total net proceeds from the sale of all securities
      sold thereunder,  but not in any event to exceed the net proceeds received
      by such  Stockholder  from the sale of  Registrable  Stock covered by such
      registration statement.

            (c)  Promptly  after  receipt  by an  indemnified  party  under this
      Section of notice of the  commencement  of any  action,  such  indemnified
      party  shall,  if a claim in  respect  thereof is to be made  against  any
      indemnifying  party under this Section,  notify the indemnifying  party in
      writing of the commencement  thereof and the indemnifying party shall have
      the right to  participate  in and assume the defense  thereof with counsel
      selected by the  indemnifying  party and  reasonably  satisfactory  to the
      indemnified party; provided, however, that an indemnified party shall have
      the right to retain its own counsel, with all fees and expenses thereof to
      be paid by such  indemnified  party, and to be apprised of all progress in
      any proceeding  the defense of which has been assumed by the  indemnifying
      party.  The  failure  to  notify an  indemnifying  party  promptly  of the
      commencement of any such action,  if and to the extent  prejudicial to its
      ability to defend such action,  shall relieve such  indemnifying  party of
      any  liability  to the  indemnified  party  under  this  Section,  but the
      omission  so to notify the  indemnifying  party will not relieve it of any
      liability that it may have to any  indemnified  party otherwise than under
      this Section.

            (d) To the extent any  indemnification  by an indemnifying  party is
      prohibited  or  limited  by  law,  the  indemnifying  party,  in  lieu  of
      indemnifying such indemnified  party,  shall contribute to the amount paid
      or payable by such indemnified  party as a result of such losses,  claims,
      damages or liabilities in such proportion as is appropriate to reflect the
      relative  fault  of  the  indemnifying  party  and  indemnified  party  in
      connection with the actions which resulted in such losses, claims, damages
      or liabilities,  as well as any other relevant  equitable  considerations.
      The relative fault of such indemnifying  party and indemnified party shall
      be determined  by reference to, among other things,  whether any action in
      question,  including  any untrue or alleged  untrue  statement of material
      fact or omission or alleged  omission to state a material  fact,  has been
      made by, or relates to information supplied by, such indemnifying party or
      indemnified party, and the parties' relative intent, knowledge,  access to
      information and opportunity to correct or prevent such action.  The amount
      paid or payable by a party as a result of the losses,  claims,  damages or
      liabilities  referred  to above  shall be deemed to  include  any legal or
      other fees or expenses  reasonably  incurred  by such party in  connection
      with any investigation or proceeding.

            The parties  hereto agree that it would not be just and equitable if
contribution  pursuant  to this  Section  4.08(d)  were  determined  by pro rata
allocation or by any other method of  allocation  which does not take account of
the equitable considerations referred to in the immediately preceding paragraph.
No person guilty of fraudulent  misrepresentation (within the meaning of Section
11(f) of the 1933 Act) shall be entitled to contribution from any person who was
not guilty of such fraudulent misrepresentation.

            SECTION 4.09. Limitation on Registration Rights. Notwithstanding any
other  provisions of this  Agreement to the  contrary,  the Company shall not be
required to register any Registrable  Stock under this Agreement with respect to
any request or requests made by any Stockholder after December 31, 2005.

            SECTION 4.10.  Lock-up.  Each Stockholder  shall, in connection with
any registration of the Company's securities, upon the request of the Company or
the underwriters managing any underwritten offering of the Company's securities,
agree in writing  not to effect any sale,  disposition  or  distribution  of any
Registrable  Stock (other than that  included in the  registration)  without the
prior written consent of the Company or such  underwriters,  as the case may be,
for such  period of time from the  effective  date of such  registration  as the
Company or the underwriters may specify;  provided,  however, that all executive
officers and  directors of the Company  shall also have agreed not to effect any
sale,   disposition  or  distribution   of  any  Registrable   Stock  under  the
circumstances and pursuant to the terms set forth in this Section 4.10.

            SECTION 4.11.  Transfer of  Registration  Rights.  The  registration
rights of any  Stockholder  under this Agreement with respect to any Registrable
Stock may be  transferred to (a) any  transferee of such  Registrable  Stock who
acquires  at  least  50% of  such  Stockholder's  shares  of  Registrable  Stock
(adjusted for stock splits and stock  consolidations after the effective date of
this Agreement) or (b) an Affiliate of such Stockholder; provided, however, that
(i) the  transferring  Stockholder  shall give the Company  written notice at or
prior  to the  time of  such  transfer  stating  the  name  and  address  of the
transferee and identifying the securities with respect to which the rights under
this  Agreement  are being  transferred;  (ii) such  transferee  shall  agree in
writing,  in form and substance  reasonably  satisfactory to the Company,  to be
bound  as  a  Stockholder  by  the  provisions  of  this  Agreement;  and  (iii)
immediately  following such transfer the further  disposition of such securities
by such transferee is restricted under the 1933 Act. Except as set forth in this
Section  4.11,  no transfer of  Registrable  Stock shall cause such  Registrable
Stock to lose such status.

                                   ARTICLE V

                                 MISCELLANEOUS

            SECTION 5.01.  Termination.  This Agreement shall terminate on the
tenth anniversary of the execution and delivery hereof.

            SECTION 5.02. Representations. Each of the parties hereto represents
that this Agreement has been duly  authorized,  executed and delivered by it and
constitutes its legal, valid and binding  obligation,  enforceable against it in
accordance with its terms.

            SECTION 5.03.  Specific  Performance.  The parties hereto agree that
irreparable  damage would occur in the event any provision of this Agreement was
not performed in accordance  with the terms hereof and that the parties shall be
entitled to specific performance of the terms hereof, in addition to any other
remedy at law or equity.

            SECTION 5.04. Amendments and Waivers. Any term of this Agreement may
be amended and the observance of any such term may be waived  (either  generally
or in a particular instance and either retroactively or prospectively) only with
the written consent of (a) the Company and (b) Stockholders holding shares of 8%
Preferred Stock Series A representing 80% of the then  outstanding  shares of 8%
Preferred Stock Series A held by all the Stockholders. Each Stockholder shall be
bound by any amendment or waiver authorized by this Section 5.04, whether or not
such Stockholder shall have consented thereto.

            SECTION 5.05. Benefit;  Successors and Assigns.  Except as otherwise
provided  herein,  this  Agreement  shall be binding upon and shall inure to the
benefit of the parties  hereto and their  respective  successors  and  permitted
assigns;  provided,  however, that this Agreement shall not inure to the benefit
of any Prospective  Transferee  unless such  Prospective  Transferee  shall have
complied with the terms of Section 3.04.  No  Stockholder  may assign any of its
rights  hereunder to any Person other than a transferee  that has complied  with
the  requirements  of Section 3.04 in all  respects.  Nothing in this  Agreement
either  express or implied is  intended  to confer on any person  other than the
parties  hereto and their  respective  successors  and  permitted  assigns,  any
rights, remedies or obligations under or by reason of this Agreement.

            SECTION 5.06.  Governing Law.  This Agreement shall be governed by
and construed in accordance with the laws of the State of New York.

            SECTION 5.07.  Counterparts.  This Agreement may be executed in two
or more counterparts, each of which shall be deemed an original, but all of
which together shall constitute one and the same instrument.

            SECTION 5.08.  Titles.  The titles of the Sections of this Agreement
are used for convenience only and are not to be considered in construing or
interpreting this Agreement.

            SECTION 5.09.  Notices.  Any notice required or permitted under this
Agreement  shall be in  writing  and shall be  delivered  in person or mailed by
certified or registered  mail,  return  receipt  requested,  or  transmitted  by
telecopier,  directed  to (a) the  Company at the  address  set forth  below its
signature hereof or (b) to a Stockholder at the address therefor as set forth in
the Company's records or at the address set forth below its signature hereof or,
in any such  case,  at such  other  address  or  addresses  as shall  have  been
furnished  in  writing  by such  party to the  others.  The giving of any notice
required hereunder may be waived in writing by the parties hereto.  Every notice
or other  communication  hereunder  shall be deemed  to have been duly  given or
served  on the  date on which  personally  delivered,  or on the  date  actually
received, if sent by mail or telecopier, with receipt acknowledged.


<PAGE>



================================================================================
            SECTION 5.10.  Severability.  If one or more provisions of this
Agreement are held to be unenforceable under applicable law, such provisions
shall be excluded from this Agreement and the balance of this Agreement shall be
interpreted as if such  provisions  were so excluded and shall be enforceable in
accordance with its terms.
================================================================================

            SECTION 5.11. Entire Agreement.  All prior agreements of the parties
concerning the subject matter of this Agreement are expressly superseded by this
Agreement.   This  Agreement  contains  the  entire  Agreement  of  the  parties
concerning the subject matter hereof. Any oral  representations or modifications
of this Agreement shall be of no effect.



<PAGE>


            IN WITNESS WHEREOF,  the parties hereto have executed this Agreement
as of the date first above written.


                                          CORNERSTONE PROPERTIES INC.


                                       By:
                                      Name:
                                     Title:

                                          Address For Notices:
                                          126 East 56th Street
                                          New York, NY 10022
                                   Attention:
                           Telecopier: (212) 605-7199


                                          HEXALON REAL ESTATE, INC.


                                       By:
                                      Name:
                                     Title:


                                          Address For Notices:
                                          950 East Paces Ferry Road,
                                          Suite 2275
                                          Atlanta, GA 30326-1119
                                   Attention:
                           Telecopier: (404) 239-6096


       CORNERSTONE PROPERTIES AND NEW YORK STATE TEACHERS ANNOUNCE STRATEGIC
                                  INVESTMENT


NEW  YORK,  NEW  YORK  November  22,  1996  --  Cornerstone   Properties  Inc.
("Cornerstone") and The New York State Teachers'  Retirement System ("NYSTRS")
announced  today  that  NYSTRS  has  made in  investment  of $100  million  in
Cornerstone,  a leading U.S.  office REIT. The investment  consisted of a cash
purchase of convertible  preferred  stock of  Cornerstone.  NYSTRS was advised
by  Equitable  Real Estate  Investment  Management  Inc. and  Cornerstone  was
advised by Lazard Freres & Co. LLC.

G. Abbott Davis,  who is in charge of NYSTRS'  $3.75  billion  mortgage and real
estate investment program,  said, "We believe investing in real estate operating
companies will be an important  part of pension fund  portfolios and we are very
pleased to be playing a key role in the growth of Cornerstone."

John S. Moody,  Cornerstone's  President and CEO,  said, "We are very excited by
this strong expression of support from NYSTRS as we seek to expand Cornerstone's
position as one of the country's major owners of premier office buildings."

Cornerstone has recently  purchased high quality office buildings in Boston, New
York,  Chicago  and  Pittsburgh  and  will  use the  NYSTRS  investment  to make
additional  acquisitions.  The Cornerstone  portfolio  presently comprises seven
buildings totaling 4.7 million square feet with 97% occupancy.








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