Draft of December 10, 1996










                CORNING CLINICAL LABORATORIES INC.

             [___]% Senior Subordinated Notes due 2006



                             Underwriting Agreement

                                                  December __, 1996

J.P. Morgan Securities Inc.,
   Goldman, Sachs & Co.,
      Lazard Freres & Co. LLC,
c/o J.P. Morgan Securities Inc.,
60 Wall Street,
New York, New York 10260.

Ladies and Gentlemen:

      Corning Clinical Laboratories, Inc., a Delaware corporation (the
"Company"), proposes, subject to the terms and conditions stated herein, to
issue and sell to the Underwriters named above (the "Underwriters") an aggregate
of $150,000,000 principal amount of the Senior Subordinated Notes specified
above (the "Notes"). The Notes are to have the benefit of the full and
unconditional, joint and several, Guarantees of the Guarantors (each as defined
below). The Notes together with the Guarantees are hereinafter collectively
referred to as the "Securities."

      1.   (a)  The Company represents and warrants to, and agrees with, each
      of the Underwriters that:

              (i) A registration statement on Form S-1 (File No. 333-15867) (the
           "Initial Registration Statement") in respect of the Securities has
           been filed with the Securities and Exchange Commission (the
           "Commission"); the Initial Registration Statement and any
           post-effective amendment thereto, each in the form heretofore
           delivered to you, have been declared effective by the Commission in
           such form; other than a registration statement, if any, increasing
           the size of the offering (a "Rule 462(b) Registration Statement"),
           filed pursuant to Rule 462(b) under the Securities Act of 1933, as
           amended (the "Act"), which became effective upon filing, no other
           document with respect to the Initial Registration Statement has
           heretofore been filed with the Commission; and no stop order
           suspending the effectiveness of the Initial Registration Statement,
           any post-effective amendment thereto or the Rule 462(b) Registration


                 





           Statement, if any, has been issued and no proceeding for that purpose
           has been initiated or threatened by the Commission (any preliminary
           prospectus included in the Initial Registration Statement, or filed
           with the Commission pursuant to Rule 424(a) of the rules and
           regulations of the Commission under the Act, is hereinafter called a
           "Preliminary Prospectus"; the various parts of the Initial
           Registration Statement and the Rule 462(b) Registration Statement, if
           any, including all exhibits thereto but excluding Form T-1 and
           including the information contained in the form of final prospectus
           filed with the Commission pursuant to Rule 424(b) under the Act in
           accordance with Section 5(a) hereof and deemed by virtue of Rule 430A
           under the Act to be part of the Initial Registration Statement at the
           time it was declared effective or such part of the Rule 462(b)
           Registration Statement, if any, at the time it became or hereinafter
           becomes effective, each as amended at the time such part of the
           registration statement became or hereinafter becomes effective, are
           hereinafter collectively called the "Registration Statement"; and
           such form of final prospectus, in the form first filed pursuant to
           Rule 424(b) under the Act, is hereinafter called the "Prospectus");

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

              (iii) The Registration Statement conforms, and the Prospectus and
           any further amendments or supplements to the Registration Statement
           or the Prospectus will conform, in all material respects to the
           requirements of the Act and the Trust Indenture Act and the rules and
           regulations of the Commission thereunder and do not and will not, as
           of the applicable effective date as to the Registration Statement and
           any amendment thereto and as of the applicable filing date as to the
           Prospectus and any amendment or supplement thereto, contain an

                              -2-

                 





           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; and the forward looking statements made
           therein were made by the Company with a reasonable basis and in good
           faith; provided, however, that this representation and warranty shall
           not apply to any statements or omissions made in reliance upon and in
           conformity with information furnished in writing to the Company by an
           Underwriter through J.P. Morgan Securities Inc. expressly for use
           therein;

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

              (v) The Company and its subsidiaries own all real property and
           personal property material to their businesses described in the
           Prospectus as owned by them, in each case free and clear of all
           liens, encumbrances and defects except such as are reflected in the
           financial statements included in the Prospectus or such as do not
           materially affect the value of such property and do not interfere
           with the use made and proposed to be made of such property by the
           Company and its subsidiaries; and any real property and buildings
           held under lease by the Company and its subsidiaries are held by them
           under valid, subsisting and enforceable leases with such exceptions
           as are not material to the Company and its subsidiaries, taken as a
           whole;

              (vi) The Company has been duly incorporated and is validly
           existing as a corporation in good standing under the laws of
           Delaware, with power and authority (corporate and other) to own its
           properties and conduct its business as described in the Prospectus,
           and has been duly qualified as a foreign corporation for the
           transaction of business and is in good standing under the laws of
           each other jurisdiction in which it

                              -3-

                 





           owns or leases properties or conducts any business so as to require
           such qualification, except to the extent that the failure so to
           qualify or be in good standing would not have a material adverse
           effect on the financial condition, results of operations, cash flows
           or stockholders' equity of the Company and its subsidiaries, taken as
           a whole (a "Material Adverse Effect"); each Guarantor has been duly
           incorporated and is validly existing as a corporation in good
           standing under the laws of its jurisdiction of incorporation, with
           power and authority (corporate and other) to enter into its Guarantee
           and own its properties and conduct its business as described in the
           Prospectus, and has been duly qualified as a foreign corporation for
           the transaction of business and is in good standing under the laws of
           each other jurisdiction in which it owns or leases properties or
           conducts any business so as to require such qualification, except to
           the extent that the failure so to qualify or be in good standing
           would not, individually or in the aggregate, have a material adverse
           effect on the financial condition, results of operations, cash flows
           or stockholders' equity of such Guarantor and its subsidiaries, taken
           as a whole (a "Guarantor Material Adverse Effect"); and each other
           subsidiary of the Company has been duly incorporated and is validly
           existing as a corporation in good standing under the laws of its
           jurisdiction of incorporation except to the extent that the failure
           so to be in good standing would not, individually or in the
           aggregate, have a Material Adverse Effect;

              (vii) After giving effect to the Distributions (as defined in the
           Prospectus), the Company will have the authorized capitalization as
           set forth in the Prospectus, and all of the issued shares of capital
           stock of the Company will have been duly and validly authorized and
           issued and will be fully paid and non-assessable; all of the issued
           shares of capital stock of each subsidiary of the Company have been
           duly and validly authorized and issued, are fully paid and
           non-assessable and (except for directors' qualifying shares and
           except as otherwise set forth in the Prospectus) are owned directly
           or indirectly by the Company or its subsidiaries, free and clear of
           all liens, encumbrances, equities or claims;

              (viii) The Notes have been duly authorized and, when executed,
           issued and delivered pursuant to this Agreement and when duly
           authenticated by the Trustee, will have been duly executed,
           authenticated, issued and delivered and will constitute valid and
           binding obligations of the Company, enforceable in accordance with
           their terms, except as the enforceability thereof may be limited by
           bankruptcy, insolvency, reorganization, moratorium or similar laws
           affecting enforcement of creditors' rights generally and except as
           enforcement

                              -4-

                 





           thereof is subject to general principles of equity (regardless of
           whether enforcement is considered in a proceeding in equity or at
           law) and entitled to the benefits provided by the Indenture dated as
           of December __, 1996 (the "Indenture") among the Company, each of the
           Guarantors and The Bank of New York , as Trustee (the "Trustee"),
           under which they are to be issued, which is substantially in the form
           filed as an exhibit to the Registration Statement; the Indenture has
           been duly authorized and duly qualified under the Trust Indenture Act
           and when executed and delivered by the Company, the Guarantors and
           the Trustee, will constitute a valid and binding instrument of the
           parties thereto, enforceable in accordance with its terms, except as
           the enforceability thereof may be limited by bankruptcy, insolvency,
           reorganization, moratorium or similar laws affecting enforcement of
           creditors' rights generally and except as enforcement thereof is
           subject to general principles of equity (regardless of whether
           enforcement is considered in a proceeding in equity or at law); and
           the Notes and the Indenture will conform to the descriptions thereof
           in the Prospectus;

              (ix) Each Guarantor (as defined in the Indenture) has duly
           authorized its Guarantee (as defined in the Indenture) of the Notes;
           upon issuance of the Notes each Guarantee will be duly executed,
           issued and delivered, will constitute a valid and binding obligation
           of the related Guarantor, enforceable in accordance with its terms,
           except as the enforceability thereof may be limited by bankruptcy,
           insolvency, reorganization, moratorium or similar laws affecting
           enforcement of creditors' rights generally and except as enforcement
           thereof is subject to general principles of equity (regardless of
           whether enforcement is considered in a proceeding in equity or at
           law); the Notes are entitled to the benefits of the full and
           unconditional, joint and several, Guarantees as provided in the
           Indenture; and the Guarantees will conform to the description thereof
           in the Prospectus;

              (x) The issue and sale of the Securities and the compliance by the
           Company with all of the provisions of the Securities, the Indenture,
           the Intercompany Agreements (as defined in the Indenture) and this
           Agreement and the consummation of the transactions herein and therein
           contemplated will not conflict with or result in a breach or
           violation of any of the terms or provisions of, or constitute a
           default under, any indenture, mortgage, deed of trust, sale/leaseback
           agreement, loan agreement or other similar financing agreement or
           instrument or other agreement or instrument to which the Company or
           any of its subsidiaries is a party or by which the Company or any of
           its subsidiaries is bound or to which any of the property or assets
           of the Company or any of its

                              -5-

                 





           subsidiaries is subject, except such breaches or violations as would
           not, individually or in the aggregate, have a Material Adverse
           Effect, nor will such action result in any violation of the
           provisions of the Certificate of Incorporation or By-laws of the
           Company or any statute or any order, rule or regulation of any court
           or governmental agency or body having jurisdiction over the Company
           or any of its subsidiaries or any of their properties; and no
           consent, approval, authorization, order, registration or
           qualification of or with any such court or governmental agency or
           body is required for the issue and sale of the Securities or the
           consummation by the Company of the transactions contemplated by this
           Agreement, the Intercompany Agreements or the Indenture, except (A)
           such consents, approvals, authorizations, orders, registrations or
           qualifications the failure so to obtain would not, individually or in
           the aggregate, have a Material Adverse Effect or as have been
           obtained under the Act or the Trust Indenture Act, and as may be
           required under state securities or Blue Sky laws in connection with
           the purchase and distribution of the Securities by the Underwriters
           and (B) notice filings in connection with (1) changing the name of
           the Company and certain subsidiaries and (2) substituting the
           ultimate parent entity with respect to substantially all licenses and
           accreditations, in each case in connection with the Distributions;

              (xi) The issuance by each Guarantor of its related Guarantee and
           the compliance by such Guarantor with all of the provisions of its
           Guarantee and the Indenture and the consummation of the transactions
           herein and therein contemplated will not conflict with or result in a
           breach or violation of any of the terms or provisions of, or
           constitute a default under, any indenture, mortgage, deed of trust,
           sale/leaseback agreement, loan agreement or other similar financing
           agreement or instrument or other agreement or instrument to which
           such Guarantor or any of its subsidiaries is a party or by which such
           Guarantor or any of its subsidiaries is bound or to which any of the
           property or assets of such Guarantor or any of its subsidiaries is
           subject, except such breaches or violations as would not,
           individually or in the aggregate, have a Guarantor Material Adverse
           Effect, nor will such action result in any violation of the
           provisions of the Certificate of Incorporation or By-laws of such
           Guarantor or any statute or any order, rule or regulation of any
           court or governmental agency or body having jurisdiction over such
           Guarantor or any of its subsidiaries or any of their properties; and
           no consent, approval, authorization, order, registration or
           qualification of or with any such court or governmental agency or
           body is required for the issuance of such Guarantor's Guarantee or
           the consummation by such Guarantor of the transactions contemplated
           by its Guarantee or the

                              -6-

                 





           Indenture, except (A) such consents, approvals, authorizations,
           orders, registrations or qualifications the failure so to obtain
           would not, individually or in the aggregate, have a Guarantor
           Material Adverse Effect or as have been obtained under the Act or the
           Trust Indenture Act, and as may be required under state securities or
           Blue Sky laws in connection with the purchase and distribution of the
           Securities by the Underwriters and (B) notice filings in connection
           with (1) changing the name of the Company and certain subsidiaries
           and (2) substituting the ultimate parent entity with respect to
           substantially all licenses and accreditation, in each case in
           connection with the Distributions;

              (xii) None of the Company, the Guarantors or any other subsidiary
           of the Company is in violation of its Certificate of Incorporation or
           Bylaws or in default in the performance or observance of any
           obligation, covenant or condition contained in any indenture,
           mortgage, deed of trust, loan agreement, lease or other agreement or
           instrument to which it is a party or by which it or any of its
           properties may be bound except such defaults which would not,
           individually or in the aggregate, have a Material Adverse Effect;

              (xiii) Other than as set forth in the Prospectus, there are no
           legal, governmental or, to the best of the Company's knowledge, qui
           tam proceedings pending to which the Company or any of its
           subsidiaries is a party or of which any property of the Company or
           any of its subsidiaries is the subject which, if determined adversely
           to the Company or any of its subsidiaries, would, individually or in
           the aggregate, have a Material Adverse Effect; and, to the best of
           the Company's knowledge, no such proceedings are threatened or
           contemplated by governmental authorities or threatened by others;

              (xiv) The Company is not and, after giving effect to the offering
           and sale of the Securities, will not be an "investment company" or an
           entity "controlled" by an "investment company", as such terms are
           defined in the Investment Company Act of 1940, as amended (the
           "Investment Company Act");

              (xv) Neither the Company nor any of its affiliates does business
           with the government of Cuba or with any person or affiliate located
           in Cuba within the meaning of Section 517.075 of the Florida
           Statutes;

              (xvi) Price Waterhouse LLP, Deloitte & Touche LLP, Ernst & Young
           LLP and Leverone & Company, who have certified certain financial
           statements of the Company and its subsidiaries, are each independent

                              -7-

                 





           public accountants as required by the Act and the rules and 
           regulations of the Commission thereunder;

              (xvii) The Company and its subsidiaries hold all licenses,
           permits, certificates and approvals that are required by, and have
           satisfied all eligibility and other similar requirements that are
           imposed by, hospital, health or similar regulatory bodies,
           administrative agencies or other governmental bodies, agencies or
           officials, or that are related to private or governmental programs
           for the reimbursement or payment of health care costs, in each case
           as required for the conduct of the respective businesses in which
           they are engaged (i) as contemplated by the Prospectus and (ii) in
           each jurisdiction or place where the conduct of their respective
           businesses requires such licenses, permits, certificates or
           approvals, or satisfaction of such requirements, except in each case
           where the failure to hold any such license, permit, certificate or
           approval, or to satisfy any such requirement, would not, individually
           or in the aggregate, have a Material Adverse Effect; and

              (xviii) All of the laboratories of the Company and its
           subsidiaries eligible for accreditation by the College of American
           Pathologists are so accredited; and all of the laboratories of the
           Company are in compliance, in all material respects, with the
           standards required by the Clinical Laboratory Improvement Amendments
           of 1988 ("CLIA");

           (b) Corning Incorporated, a New York corporation ("Corning"),
      represents and warrants to, and agrees with, each of the Underwriters
      that:

              (i) The Registration Statement conforms, and the Prospectus and
           any further amendments or supplements to the Registration Statement
           or the Prospectus will conform, in all material respects to the
           requirements of the Act and the Trust Indenture Act and the rules and
           regulations of the Commission thereunder and do not and will not, as
           of the applicable effective date as to the Registration Statement and
           any amendment thereto and as of the applicable filing date as to the
           Prospectus and any amendment or supplement thereto, contain an untrue
           statement of a material fact or omit to state a material fact
           required to be stated therein or necessary to make the statements
           therein not misleading; and the forward looking statements made
           therein were made by the Company with a reasonable basis and in good
           faith; provided, however, that this representation and warranty shall
           not apply to any statements or omissions made in reliance upon and in
           conformity with information furnished in writing to the Company by an
           Underwriter through J.P. Morgan Securities Inc. expressly for use
           therein;

                              -8-

                 






              (ii) The consummation of the Distributions, the issue and sale of
           the Securities by the Company and the compliance by Corning with all
           of the provisions of the Intercompany Agreements and this Agreement
           and the consummation of the transactions herein and therein
           contemplated will not conflict with or result in a breach or
           violation of any of the terms or provisions of, or constitute a
           default under, any indenture, mortgage, deed of trust, sale/leaseback
           agreement, loan agreement or other similar financing agreement or
           instrument or other agreement or instrument to which Corning or any
           of its subsidiaries is a party or by which Corning or any of its
           subsidiaries is bound or to which any of the property or assets of
           Corning or any of its subsidiaries is subject, except such breaches
           or violations as would not, individually or in the aggregate, have a
           material adverse effect on the financial position, results of
           operations, cash flows or stockholders' equity of Corning and its
           subsidiaries, taken as a whole (a "Corning Material Adverse Effect"),
           nor will such action result in any violation of the provisions of the
           Certificate of Incorporation, as amended, or By-laws of Corning or
           any statute or any order, rule or regulation of any court or
           governmental agency or body having jurisdiction over Corning or any
           of its subsidiaries or any of their properties; and no consent,
           approval, authorization, order, registration or qualification of or
           with any such court or governmental agency or body is required for
           the consummation of the Distributions, the issue and sale of the
           Securities by the Company or the consummation by Corning of the
           transactions contemplated by the Intercompany Agreements or this
           Agreement, except such consents, approvals, authorizations, orders,
           registrations or qualifications the failure so to obtain would not,
           individually or in the aggregate, have a Corning Material Adverse
           Effect, or as have been obtained, and such consents, approvals,
           authorizations, registrations or qualifications as may be required
           under state securities or Blue Sky laws in connection with the
           purchase and distribution of the Securities by the Underwriters; and
           Corning has taken all action (corporate and other) to authorize and
           approve the Distributions;

              (iii) Each of the Intercompany Agreements has been duly authorized
           and, at the Time of Delivery, will be duly executed and delivered by
           the parties thereto and will constitute a valid and binding agreement
           of each of the parties thereto, enforceable against each of such
           parties in accordance with its terms, except as the enforceability
           thereof may be limited by bankruptcy, insolvency, reorganization,
           moratorium or similar laws affecting enforcement of creditors' rights
           generally and except as enforcement thereof is subject to general

                              -9-

                 





           principles of equity (regardless of whether enforcement is considered
           in a proceeding in equity or at law);

           (c) The Company and Corning, jointly and severally, represent and
      warrant to, and agree with, each of the Underwriters that the
      representations and other information set forth in the materials submitted
      by Corning and the Company to the Internal Revenue Service ("IRS") in
      connection with their request for a private letter ruling from the IRS
      (the "IRS Ruling") were as of the date submitted, and remain as of the
      date of this Agreement and will remain as of the Time of Delivery,
      complete and accurate in all material respects; and as of the date of this
      Agreement and as of the Time of Delivery, the IRS has neither revoked nor
      threatened the revocation of the IRS Ruling and, to the best of Corning's
      and the Company's knowledge, there exist no other reasons Corning or the
      Company is or is likely to become unable to rely upon the IRS ruling.

      2. Subject to the terms and conditions herein set forth, the Company
agrees to issue and sell to the Underwriters, and each of the Underwriters
agrees, severally and not jointly, to purchase from the Company, at a purchase
price of ....% of the principal amount thereof, plus accrued interest, if any,
from December __, 1996 to the Time of Delivery hereunder, the principal amount
of Securities set forth opposite the name of such Underwriter in Schedule I
hereto.

      3.   Upon the authorization by J.P. Morgan Securities Inc. of the release 
of the Securities, the several Underwriters propose to offer the Securities for 
sale upon the terms and conditions set forth in the Prospectus.

      4. (a) The Securities to be purchased by each Underwriter hereunder, in
      definitive form, and in such authorized denominations and registered in
      such names as J.P. Morgan Securities Inc. may request upon at least
      forty-eight hours' prior notice to the Company, shall be delivered by or
      on behalf of the Company to J.P. Morgan Securities Inc., for the account
      of each Underwriter, against payment by or on behalf of such Underwriter
      of the purchase price therefor by wire transfer of immediately available
      funds. The Company will cause the certificates representing the Securities
      to be made available for checking and packaging at least twenty-four hours
      prior to the Time of Delivery (as defined below) at the office of J.P.
      Morgan Securities Inc., 60 Wall Street, New York, New York 10260 (the
      "Designated Office"). The time and date of such delivery and payment shall
      be 9:30 a.m., New York City time, on December __, 1996 or such other time
      and date as J.P. Morgan Securities Inc., Corning and the Company may agree
      upon in writing. Such time and date are herein called the "Time of
      Delivery".


                              -10-

                 





           (b) The documents to be delivered at the Time of Delivery by or on
      behalf of the parties hereto pursuant to Section 7 hereof, including the
      cross- receipt for the Securities and any additional documents requested
      by the Underwriters pursuant to Section 7(p) hereof, will be delivered at
      the offices of Sullivan & Cromwell, 125 Broad Street, New York, New York
      (the "Closing Location"), and the Securities will be delivered at the
      Designated Office, all at the Time of Delivery. A meeting will be held at
      the Closing Location at 2:00 p.m., New York City time, on the New York
      Business Day next preceding the Time of Delivery, at which meeting the
      final drafts of the documents to be delivered pursuant to the preceding
      sentence will be available for review by the parties hereto. "New York
      Business Day" shall mean each Monday, Tuesday, Wednesday, Thursday and
      Friday which is not a day on which banking institutions in New York are
      generally authorized or obligated by law or executive order to close.

      5.   (a) The Company and Corning, jointly and severally, agree with each
            of the Underwriters:

              (i) To prepare the Prospectus in a form approved by you and to
           file such Prospectus pursuant to Rule 424(b) under the Act not later
           than the Commission's close of business on the second business day
           following the execution and delivery of this Agreement, or, if
           applicable, such earlier time as may be required by Rule 430A(a)(3)
           under the Act; to make no further amendment or any supplement to the
           Registration Statement, Prospectus or, prior to the Distributions,
           the Company's Registration Statement on Form 10, dated November 26,
           1996 (the "Company's Form 10"), which shall be disapproved by the
           Underwriters promptly after reasonable notice thereof; to advise the
           Underwriters promptly after either of them receives notice thereof,
           of the time when the Registration Statement, or any amendment
           thereto, has been filed or becomes effective or any supplement to the
           Prospectus or any amended Prospectus has been filed and to furnish
           the Underwriters with copies thereof; to advise the Underwriters,
           promptly after either of them receives notice thereof, of the
           issuance by the Commission of any stop order or of any order
           preventing or suspending the use of any Preliminary Prospectus or
           Prospectus or the Company's Form 10 or the Registration Statement on
           Form 10, dated November 22, 1996, of Covance Inc. (together with the
           Company's Form 10, the "Form 10s") of the suspension of the
           qualification of the Securities, the Company's common stock with
           attached preferred stock purchase rights (the "Company Common Stock")
           and Covance's common stock with attached preferred stock purchase
           rights (the "Covance Common Stock") for offering or sale in any
           jurisdiction, of the initiation or threatening of any proceeding for

                              -11-

                 





           any such purpose, or of any request by the Commission for the
           amending or supplementing of the Registration Statement or Prospectus
           or Form 10s or for additional information; and, in the event of the
           issuance of any stop order or of any order preventing or suspending
           the use of any Preliminary Prospectus or Prospectus or Form 10s or
           suspending any such qualification, to promptly use its best efforts
           to obtain the withdrawal of such order;

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

              (iii) Prior to 5:00 p.m., New York City time, on the New York
           Business Day next succeeding the date of this Agreement and from time
           to time, to furnish the Underwriters with copies of the Prospectus in
           New York City in such quantities as the Underwriters may reasonably
           request, and, if the delivery of a prospectus is required at any time
           prior to the expiration of nine months after the time of issue of the
           Prospectus in connection with the offering or sale of the Securities
           and if at such time any event shall have occurred as a result of
           which the Prospectus as then amended or supplemented would include an
           untrue statement of a material fact or omit to state any material
           fact necessary in order to make the statements therein, in light of
           the circumstances under which they were made when such Prospectus is
           delivered, not misleading, or, if for any other reason it shall be
           necessary during such same period to amend or supplement the
           Prospectus in order to comply with the Act or the Trust Indenture
           Act, to notify the Underwriters and upon the request of any
           Underwriter to prepare and furnish without charge to such Underwriter
           and to any dealer in securities as many copies as such Underwriter
           may reasonably request of an amended Prospectus or a supplement to
           the Prospectus which will correct such statement or omission or
           effect such compliance; and in case any Underwriter is required to
           deliver a prospectus in connection with sales of any of the
           Securities at any time nine months or more after the time of issue of
           the Prospectus, upon request of such Underwriter but at the expense
           of such Underwriter, to prepare and deliver to such Underwriter as
           many

                              -12-

                 





           copies as such Underwriter may request of an amended or supplemented
           Prospectus complying with Section 10(a)(3) of the Act;

              (iv) If the Company elects to rely upon Rule 462(b), the Company
           shall file a Rule 462(b) Registration Statement with the Commission
           in compliance with Rule 462(b) by 10:00 p.m., Washington, D.C. time,
           on the date of this Agreement, and the Company shall at the time of
           filing either pay to the Commission the filing fee for the Rule
           462(b) Registration Statement or give irrevocable instructions for
           the payment of such fee pursuant to Rule 111(b) under the Act;

              (v) To use the net proceeds received by it from the sale of the
           Securities pursuant to this Agreement in the manner specified in the
           Prospectus under the caption "Use of Proceeds";

              (vi) Until the earlier of (A) the termination of the Escrow
           Agreement in accordance with its terms and (B) the occurrence of the
           Distributions, to take no action, directly or indirectly, to amend or
           alter, in any material respect, or terminate any Intercompany
           Agreement without the prior consent of the Underwriters, which
           consent shall not be unreasonably withheld; provided, however, that
           Corning and the Company may amend the Transaction Agreement (as
           defined in the Indenture) to change or abandon the Distribution Date
           (as defined therein) to such date as may be determined by Corning's
           Board of Directors; and

              (vii) In the event the Distributions occur, to cause the Company
           to have the capitalization contemplated by the Prospectus as of the
           date of the Distributions.

           (b) The Company agrees with each of the Underwriters:

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

              (ii) During the period beginning from the date hereof and
           continuing to and including the later of the Time of Delivery and
           such earlier time as you may notify the Company, not to offer, sell,
           contract

                              -13-

                 





           to sell or otherwise dispose of, except as provided hereunder, debt
           securities of the Company with a maturity of more than one year;

              (iii) During a period of five years from the effective date of the
           Registration Statement, to furnish to the Underwriters copies of all
           written reports or other communications (financial or other)
           furnished to stockholders, and to deliver to the Underwriters
           (without duplication) as soon as they are available, (A) copies of
           any reports and financial statements furnished to or filed with the
           Commission or any national securities exchange on which the
           Securities or any class of securities of the Company is listed and
           (B) the documents specified in Section 1018 of the Indenture as in
           effect at the Time of Delivery; and

              (iv) To file with the Commission such reports on Form SR as may be
           required by Rule 463 under the Act.

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

                              -14-

                 






      7. The obligations of the Underwriters hereunder shall be subject, in the
sole discretion of the Underwriters, to the condition that all representations
and warranties and other statements of the Company and Corning herein are, at
and as of the Time of Delivery, true and correct, the condition that the Company
and Corning shall have performed all of their obligations hereunder theretofore
to be performed, and the following additional conditions:

           (a) The Prospectus shall have been filed with the Commission pursuant
      to Rule 424(b) within the applicable time period prescribed for such
      filing by the rules and regulations under the Act and in accordance with
      Section 5 (a) hereof; if the Company has elected to rely upon Rule 462(b),
      the Rule 462(b) Registration Statement shall have become effective by
      10:00 p.m., Washington, D.C. time, on the date of this Agreement; no stop
      order suspending the effectiveness of the Registration Statement or any
      part thereof shall have been issued and no proceeding for that purpose
      shall have been initiated or threatened by the Commission; and all
      requests for additional information on the part of the Commission shall
      have been complied with to the reasonable satisfaction of the
      Underwriters;

           (b) Sullivan & Cromwell, counsel for the Underwriters, shall have
      furnished to the Underwriters such opinion or opinions, dated the Time of
      Delivery, with respect to the incorporation of the Company, the validity
      of the Indenture, the Securities, the Registration Statement, the
      Prospectus, and such other related matters as the Underwriters may
      reasonably request, and such counsel shall have received such papers and
      information as they may reasonably request to enable them to pass upon
      such matters;

           (c) Shearman & Sterling, counsel for the Company, shall have
      furnished to the Underwriters their written opinion, dated the Time of
      Delivery, in form and substance satisfactory to the Underwriters, to the
      effect that:

              (i) The Notes have been duly authorized, executed, authenticated,
           issued and delivered and constitute valid and binding obligations of
           the Company, enforceable in accordance with their terms, except as
           the enforceability thereof may be limited by bankruptcy, insolvency
           (including all laws relating to fraudulent transfer), reorganization,
           moratorium or similar laws affecting enforcement of creditors' rights
           generally and except as enforcement thereof is subject to general
           principles of equity (regardless of whether enforcement is considered
           in a proceeding in equity or at law), and entitled to the benefits
           provided by the Indenture;


                              -15-

                 





              (ii) The Indenture has been duly authorized, executed and
           delivered by the Company and, assuming due authorization, execution
           and delivery by the Trustee and due authorization by each Guarantor,
           constitutes a valid and binding agreement of the Company and each
           Guarantor, enforceable against the Company and each Guarantor in
           accordance with its terms, except as the enforceability thereof may
           be limited by bankruptcy, insolvency (including all laws relating to
           fraudulent transfer), reorganization, moratorium or similar laws
           affecting enforcement of creditors' rights generally and except as
           enforcement thereof is subject to general principles of equity
           (regardless of whether enforcement is considered in a proceeding in
           equity or at law); duly qualified under the Trust Indenture Act;

              (iii) Assuming due incorporation of each of the Guarantors and due
           authorization, execution and delivery by each Guarantor, the
           Guarantees of each Guarantor constitute valid and binding obligations
           of each such Guarantor, enforceable in accordance with their terms,
           except as the enforceability thereof may be limited by bankruptcy,
           insolvency (including all laws relating to fraudulent transfer),
           reorganization, moratorium or similar laws affecting enforcement of
           creditors' rights generally and except as enforcement thereof is
           subject to general principles of equity (regardless of whether
           enforcement is considered in a proceeding in equity or at law);

              (iv) The statements set forth in the Prospectus under the caption
           "Description of the Notes", insofar as they purport to constitute a
           summary of the terms of the Securities, and under the captions
           "Description of the Credit Facility" and "Underwriting", insofar as
           they purport to describe the provisions of the laws and documents
           referred to therein, fairly present in all material respects the
           information called for with respect to such matters and documents and
           fairly summarize the matters and documents referred to therein;

              (v) The Registration Statement and the Prospectus and any further
           amendments and supplements thereto made by the Company prior to the
           Time of Delivery (in each case, other than the financial statements
           and related schedules and other financial and statistical data
           included therein or omitted therefrom and the Statement of
           Eligibility of the Trustee on Form T-1, as to which such counsel need
           express no opinion) comply as to form in all material respects with
           the requirements of the Act and the Trust Indenture Act and the rules
           and regulations thereunder. Such counsel shall also state that such
           counsel has not verified, and is not passing upon and does not assume
           any responsibility for, the accuracy,

                              -16-

                 





           completeness or fairness of the statements contained in the
           Registration Statement or the Prospectus, except those set forth in
           subparagraph (iv) above. Such counsel shall state that it has,
           however, generally reviewed and discussed such statements with
           certain officers of the Company, its counsel and its auditors, and
           with your representatives. Such counsel shall state that in the
           course of this review and discussion, no facts have come to such
           counsel's attention that lead such counsel to believe that (i) the
           Registration Statement or any amendment thereto (except for the
           financial statements and other financial or statistical data included
           therein or omitted therefrom, as to which such counsel need not
           comment), at the time the Registration Statement or any such
           amendment became effective, contained any untrue statement of a
           material fact or omitted to state a material fact required to be
           stated therein or necessary to make the statements therein not
           misleading or (ii) the Prospectus or any amendment or supplement
           thereto (except for the financial statements and related schedules
           and other financial and statistical data included therein or omitted
           therefrom, as to which such counsel need not comment), as of its date
           or the Time of Delivery, contained or contains any untrue statement
           of a material fact or omitted or omits to state any material fact
           necessary in order to make the statements therein, in the light of
           the circumstances under which they were made, not misleading.

           (d) Raymond C. Marier, Vice President and General Counsel of the
      Company, shall have furnished to the Underwriters his written opinion,
      dated the Time of Delivery, in form and substance satisfactory to the
      Underwriters, to the effect that:

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

              (ii) The Company has been duly qualified as a foreign corporation
           for the transaction of business and is in good standing under the
           laws of each other jurisdiction in which it owns or leases properties
           or conducts any business so as to require such qualification, except
           to the extent that the failure so to qualify or be in good standing
           would not, individually or in the aggregate, have a Material Adverse
           Effect (such counsel being entitled to rely in respect of the opinion
           in this clause upon opinions of local counsel and in respect of
           matters of fact upon certificates of officers of the Company,
           provided that such counsel shall

                              -17-

                 





           state that such counsel believes that both the Underwriters and such
           counsel are justified in relying upon such opinions and
           certificates);

              (iii) After giving effect to the Distributions, the Company will
           have the authorized capitalization as set forth in the Prospectus,
           and all of the issued shares of capital stock of the Company will
           have been duly and validly authorized and issued and will be fully
           paid and non-assessable;

              (iv) Each Guarantor has been duly incorporated and is validly
           existing as a corporation in good standing under the laws of its
           jurisdiction of incorporation; and all of the issued shares of
           capital stock of each such Guarantor have been duly and validly
           authorized and issued, are fully paid and non-assessable, and (except
           for directors' qualifying shares and except as otherwise set forth in
           the Prospectus) are owned directly or indirectly by the Company, free
           and clear of all liens, encumbrances, equities or claims;

              (v) Each Guarantor has been duly qualified as a foreign
           corporation for the transaction of business and is in good standing
           under the laws of each other jurisdiction in which it owns or leases
           properties or conducts any business so as to require such
           qualification, except to the extent that the failure so to qualify or
           be in good standing would not, individually or in the aggregate, have
           a Guarantor Material Adverse Effect; and each Guarantor has duly
           authorized, executed and delivered its Guarantee and the Indenture
           (such counsel being entitled to rely in respect of the opinion in
           this clause upon opinions of local counsel and in respect of matters
           of fact upon certificates of officers of the Guarantors, provided
           that such counsel shall state that such counsel believes that both
           the Underwriters and such counsel are justified in relying upon such
           opinions and certificates);

              (vi) To the best of such counsel's knowledge and other than as set
           forth in the Prospectus, there are no legal, governmental or qui tam
           proceedings pending to which the Company or any of its subsidiaries
           is a party or of which any property of the Company or any of its
           subsidiaries is the subject which, if determined adversely to the
           Company or any of its subsidiaries, would, individually or in the
           aggregate, have a Material Adverse Effect; and, to the best of such
           counsel's knowledge, no such proceedings are threatened or
           contemplated by governmental authorities or threatened by others;

              (vii)  This Agreement has been duly authorized, executed and
           delivered by the Company;

                              -18-

                 






              (viii) The issue and sale of the Securities and the compliance by
           the Company with all of the provisions of the Securities, the
           Indenture, the Intercompany Agreements and this Agreement and the
           consummation of the transactions herein and therein contemplated will
           not conflict with or result in a breach or violation of any of the
           terms or provisions of, or constitute a default under, any indenture,
           mortgage, deed of trust, sale/leaseback agreement, loan agreement or
           other similar financing agreement or any other agreement or
           instrument known to such counsel to which the Company or any of its
           subsidiaries is a party or by which the Company or any of its
           subsidiaries is bound or to which any of the property or assets of
           the Company or any of its subsidiaries is subject, except such
           breaches or violations as would not, individually or in the
           aggregate, have a Material Adverse Effect, nor will such action
           result in any violation of the provisions of the Certificate of
           Incorporation or By-laws of the Company or any statute or any order,
           rule or regulation of any court or governmental agency or body having
           jurisdiction over the Company or any of its subsidiaries or any of
           their properties;

              (ix) No consent, approval, authorization, order, registration or
           qualification of or with any such court or governmental agency or
           body is required for the issue and sale of the Securities or the
           consummation by the Company of the transactions contemplated by this
           Agreement, the Intercompany Agreements or the Indenture, except (A)
           such consents, approvals, authorizations, orders, registrations or
           qualifications the failure so to obtain would not, individually or in
           the aggregate, have a Material Adverse Effect or as have been
           obtained under the Act or the Trust Indenture Act and as may be
           required under state securities or Blue Sky laws in connection with
           the purchase and distribution of the Securities, by the Underwriters
           and (B) notice filings in connection with (1) changing the name of
           the Company and certain subsidiaries and (2) substituting the
           ultimate parent entity with respect to substantially all licenses and
           accreditation, in each case in connection with the Distributions;

              (x) To the best of such counsel's knowledge, the issuance of the
           Guarantees and the compliance by each of the Guarantors with all of
           the provisions of the Guarantees and the Indenture and the
           consummation of the transactions herein and therein contemplated will
           not conflict with or result in a breach or violation of any of the
           terms or provisions of, or constitute a default under, any indenture,
           mortgage, deed of trust, sale/leaseback agreement, loan agreement or
           other similar financing agreement or any other agreement or
           instrument known to such counsel to which any Guarantor or any of its
           subsidiaries is a party or by which

                              -19-

                 





           any Guarantor or any of its subsidiaries is bound or to which any of
           the property or assets of any Guarantor or any of its subsidiaries is
           subject, except such breaches of violations as would not,
           individually or in the aggregate, have a Guarantor Material Adverse
           Effect, nor will such action result in any violation of the
           provisions of the Certificate of Incorporation or By-laws of any
           Guarantor or any statute or any order, rule or regulation of any
           court or governmental agency or body having jurisdiction over any
           Guarantor or any of its subsidiaries or any of their properties;

              (xi) To the best of such counsel's knowledge, no consent,
           approval, authorization, order, registration or qualification of or
           with such court or governmental agency or body is required by any
           Guarantor for the issuance of the Guarantees or the consummation by
           such Guarantor of the transactions contemplated by this Agreement or
           the Indenture, except (A) such consents, approvals, authorizations,
           orders, registrations or qualifications the failure so to obtain
           would not, individually or in the aggregate, have a Guarantor
           Material Adverse Effect or as have been obtained under the Act or the
           Trust Indenture Act and as may be required under state securities or
           Blue Sky laws in connection with the purchase and distribution of the
           Securities by the Underwriters and (B) notice filings in connection
           with (1) changing the name of the Company and certain subsidiaries
           and (2) substituting the ultimate parent entity with respect to
           substantially all licenses and accreditation, in each case in
           connection with the Distributions;

              (xii) The statements set forth in the Prospectus under the
           captions "Risk Factors -- Government Regulation" and "-- Government
           Investigations and Related Claims", and "Business -- Regulation and
           Reimbursement" and "-- Government Investigations and Related Claims",
           insofar as they purport to describe the provisions of the laws and
           documents referred to therein, fairly present in all material
           respects the information called for with respect to such matters,
           documents and laws and fairly summarize the matters, documents and
           laws referred to therein;

              (xiii) The Company is not an "investment company" or an entity
           "controlled" by an "investment company", as such terms are defined in
           the Investment Company Act;

              (xiv) To the best of such counsel's knowledge, other than as
           disclosed in the Prospectus, there are no current, pending or
           threatened administrative or legal proceedings which are reasonably
           likely to affect

                              -20-

                 





           (i) any of the Company's laboratory's accreditation with CAP, (ii)
           the Company's qualification to perform services for, and receive
           reimbursement from, Medicaid or Medicare or (iii) the Company's
           ability to conduct the clinical testing business in any state,
           except, in each case, for any such proceedings that, individually or
           in the aggregate, would not have a Material Adverse Effect;

              (xv) Each of the Intercompany Agreements to which the Company is a
           party has been duly authorized, executed and delivered by the Company
           and constitutes a valid and binding agreement of the Company,
           enforceable in accordance with its terms, except as the
           enforceability thereof may be limited by bankruptcy, insolvency
           (including all laws relating to fraudulent transfer), reorganization,
           moratorium or similar laws affecting enforcement of creditors' rights
           generally and except as enforcement thereof is subject to general
           principles of equity (regardless of whether enforcement is considered
           in a proceeding in equity or at law);

              (xvi) The Registration Statement and the Prospectus and any
           further amendments and supplements thereto made by the Company prior
           to the Time of Delivery (in each case other than the financial
           statements and related schedules and other financial and statistical
           data included therein or omitted therefrom and the Statement of
           Eligibility of the Trustee on Form T-1, as to which such counsel need
           express no opinion) comply as to form in all material respects with
           the requirements of the Act and the Trust Indenture Act and the rules
           and regulations thereunder. Such counsel shall also state that such
           counsel has not verified, and is not passing upon and does not assume
           any responsibility for, the accuracy, completeness or fairness of the
           statements contained in the Registration Statement or the Prospectus,
           except those set forth in subparagraph (xii) above. Such counsel
           shall state that it has, however, generally reviewed and discussed
           such statements with certain officers of the Company, its counsel and
           its auditors, and with your representatives. Such counsel shall state
           that in the course of this review and discussion, no facts have come
           to such counsel's attention that lead such counsel to believe that
           (i) the Registration Statement or any amendment thereto (except for
           the financial statements and other financial or statistical data
           included therein or omitted therefrom, as to which such counsel need
           not comment), at the time the Registration Statement or any such
           amendment became effective, contained any untrue statement of a
           material fact or omitted to state a material fact required to be
           stated therein or necessary to make the statements therein not
           misleading or (ii) the Prospectus or any amendment or supplement
           thereto (except for

                              -21-

                 





           the financial statements and related schedules and other financial
           and statistical data included therein or omitted therefrom, as to
           which such counsel need not comment), as of its date or the Time of
           Delivery, contained or contains any untrue statement of a material
           fact or omitted or omits to state any material fact necessary in
           order to make the statements therein, in the light of the
           circumstances under which they were made, not misleading. Such
           counsel shall also state that such counsel does not know of any
           amendment to the Registration Statement required to be filed or of
           any contracts or other documents of a character required to be filed
           as an exhibit to the Registration Statement or required to be
           described in the Registration Statement or the Prospectus which are
           not filed or described as required;

           (e) William C. Ughetta, Senior Vice President and General Counsel of
      Corning, shall have furnished to the Underwriters his written opinion,
      dated the Time of Delivery, in form and substance satisfactory to the
      Underwriters, to the effect that:

              (i) Corning has been duly incorporated and is validly existing as
           a corporation in good standing under the laws of the State of New
           York;

              (ii) Each of the Intercompany Agreements to which Corning is a
           party has been duly authorized, executed and delivered by Corning and
           constitutes a valid and binding agreement of Corning, enforceable in
           accordance with its terms, except as the enforceability thereof may
           be limited by bankruptcy, insolvency (including all laws relating to
           fraudulent transfer), reorganization, moratorium or similar laws
           affecting enforcement of creditors' rights generally and except as
           enforcement thereof is subject to general principles of equity
           (regardless of whether enforcement is considered in a proceeding in
           equity or at law);

              (iii) The consummation of the Distributions, the issue and sale of
           the Securities by the Company and the compliance by Corning with all
           of the provisions of the Intercompany Agreements and this Agreement
           and the consummation of the transactions herein and therein
           contemplated will not conflict with or result in a breach or
           violation of any of the terms or provisions of, or constitute a
           default under, any indenture, mortgage, deed of trust, sale/leaseback
           agreement, loan agreement or other similar financing agreement or
           instrument or other agreement or instrument to which Corning or any
           of its subsidiaries is a party or by which Corning or any of its
           subsidiaries is bound or to which any of the property or assets of
           Corning or any of its subsidiaries is subject, except such breaches
           or violations as would not, individually or

                              -22-

                 





           in the aggregate, have a Corning Material Adverse Effect, nor will
           such action result in any violation of the provisions of the
           Certificate of Incorporation, as amended, or By-laws of Corning or
           any statute or any order, rule or regulation of any court or
           governmental agency or body having jurisdiction over Corning or any
           of its subsidiaries or any of their properties; and no consent,
           approval, authorization, order, registration or qualification of or
           with any such court or governmental agency or body is required for
           the consummation of the Distributions, the issue and sale of the
           Securities by the Company or the consummation by Corning of the
           transactions contemplated by the Intercompany Agreements or this
           Agreement, except such consents, approvals, authorizations, orders,
           registrations or qualifications the failure so to obtain would not,
           individually or in the aggregate, have a Corning Material Adverse
           Effect or as have been obtained, and such consents, approvals,
           authorizations, registrations or qualifications as may be required
           under state securities or Blue Sky laws in connection with the
           purchase and distribution of the Securities by the Underwriters; and
           Corning has taken all action (corporate and other) to authorize and
           approve the Distributions;

           (f) Jeffrey S. Hurwitz, Corporate Senior Vice President, General
      Counsel and Secretary of Covance, shall have furnished to the Underwriters
      his written opinion, dated the Time of Delivery, in form and substance
      satisfactory to the Underwriters, to the effect that:

              (i)  Covance has been duly incorporated and is validly existing as
           a corporation in good standing under the laws of the State of 
           Delaware; and

              (ii) Each of the Intercompany Agreements to which Covance is a
           party has been duly authorized, executed and delivered by Covance and
           constitutes a valid and binding agreement of Covance, enforceable in
           accordance with its terms, except as the enforceability thereof may
           be limited by bankruptcy, insolvency (including all laws relating to
           fraudulent transfer), reorganization, moratorium or similar laws
           affecting enforcement of creditors' rights generally and except as
           enforcement thereof is subject to general principles of equity
           (regardless of whether enforcement is considered in a proceeding in
           equity or at law);

           (g) On the date of the Prospectus at a time prior to the execution of
      this Agreement, at 9:30 a.m., New York City time, on the effective date of
      any post-effective amendment to the Registration Statement filed
      subsequent to the date of this Agreement and also at the Time of Delivery,
      Price Waterhouse LLP, shall have furnished to you, a letter or letters,
      dated the respective dates of

                              -23-

                 





      delivery thereof, in form and substance satisfactory to the Underwriters
      (the executed copy of the letter delivered prior to the execution of this
      Agreement is attached as Annex I(a) hereto);

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

           (i) The Securities shall have been rated at least B+ and B2 by
      Standard & Poor's Rating Group and Moody's Investor Services, Inc.,
      respectively, and on or after the date hereof (i) no downgrading shall
      have occurred in such ratings and (ii) such ratings shall not have been
      put under surveillance or review, with possible negative implications;

           (j) On or after the date hereof there shall not have occurred any of
      the following: (i) a suspension or material limitation in trading in
      securities generally on the NYSE or on NASDAQ; (ii) a suspension or
      material limitation in trading in the Company's or Corning's securities on
      the NYSE; (iii) a general moratorium on commercial banking activities in
      New York declared by either Federal or New York State authorities; or (iv)
      the outbreak or escalation of hostilities involving the United States or
      the declaration by the United States of a national emergency or war, if
      the effect of any such event specified in this Clause (iv) in your
      judgment makes it impracticable to proceed with the public offering or the
      delivery of the Securities on the terms and in the manner contemplated in
      the Prospectus; or (v) the occurrence of any material adverse change in
      the existing financial, political or economic conditions in the United
      States or elsewhere which, in your judgment, would materially and
      adversely

                              -24-

                 





      affect the financial markets or the market for the Securities and other 
      debt securities;

           (k) The Company has entered into the Credit Facility (as defined in
      the Prospectus) in substantially the form contemplated by the Prospectus;
      the Company has borrowed $350 million under the Credit Facility and has up
      to $100 million available under the working capital portion of the Credit
      Facility, substantially all of which will be available for borrowing at
      the Time of Delivery; and there shall be no default or event of default
      under the Credit Facility or the existence of any event which with notice
      or lapse of time, or both, would constitute a default or an event of
      default under the Credit Facility;

           (l) The IRS Ruling shall be in full force and effect;

           (m) The "no-action" letter from the Commission to Corning with
      respect to the absence of a need to register the Company Common Stock and
      Covance Common Stock issued in the Distributions shall be in full force
      and effect;

           (n) The Company shall have complied with the provisions of Section
      5(c) hereof with respect to the furnishing of prospectuses on the New York
      Business Day next succeeding the date of this Agreement;

           (o) The Escrow Agreement, in a form reasonably satisfactory to you,
      shall have been duly executed and delivered by each of the parties
      thereto, and all of the Intercompany Agreements (other than the Escrow
      Agreement) shall have been duly and irrevocably placed in escrow with the
      Escrow Agent pursuant to, and in accordance with, the Escrow Agreement;

           (p) All of the conditions to the consummation of the Distributions
      set forth in the Transaction Agreement, dated as of November 22, 1996,
      among the Company, Corning, Corning Life Sciences Inc., Corning Clinical
      Laboratories Inc. (MI) and Covance, shall have been satisfied or waived,
      other than the sale of the Securities and the application of the proceeds
      therefrom and the events contemplated by Section 5(a)(vii); and

           (q) The Company and Corning shall have furnished or caused to be
      furnished at the Time of Delivery certificates of officers of the Company
      and Corning reasonably satisfactory to you as to the accuracy of the
      representations and warranties of the Company and Corning herein at and as
      of such Time of Delivery, as to the performance by the Company and Corning
      of all of their obligations hereunder to be performed at or prior to such
      Time of Delivery, as to the matters set forth in subsections (a) and (h)
      of this Section and as to such other matters as you may reasonably
      request.

                              -25-

                 






      8. (a) The Company and Corning will, jointly and severally, indemnify and
      hold harmless each Underwriter against any losses, claims, damages or
      liabilities, to which such Underwriter may become subject, under the Act
      or otherwise, insofar as such losses, claims, damages or liabilities (or
      actions in respect thereof) arise out of or are based upon an untrue
      statement or alleged untrue statement of a material fact contained in any
      Preliminary Prospectus, the Registration Statement or the Prospectus, or
      any amendment or supplement thereto, or arise out of or are based upon the
      omission or alleged omission to state therein a material fact required to
      be stated therein or necessary to make the statements therein not
      misleading, and will reimburse each Underwriter for any legal or other
      expenses reasonably incurred by such Underwriter in connection with
      investigating or defending any such action or claim as such expenses are
      incurred; provided, however, that the Company shall not be liable in any
      such case to the extent that any such loss, claim, damage or liability
      arises out of or is based upon an untrue statement or alleged untrue
      statement or omission or alleged omission made in any Preliminary
      Prospectus, the Registration Statement or the Prospectus or any such
      amendment or supplement in reliance upon and in conformity with written
      information furnished to the Company by any Underwriter through J.P.
      Morgan Securities Inc. expressly for use therein and provided, further,
      that the Company and Corning shall not be liable to any Underwriter under
      the indemnity agreement in this subsection (a) with respect to any
      Preliminary Prospectus to the extent that any such loss, claim, damage or
      liability of such Underwriter results from the fact that such Underwriter
      sold Securities to a person as to whom it shall be established that there
      was not sent or given, at or prior to the written confirmation of such
      sale, a copy of the Prospectus in any case where such delivery is required
      by the Act if the Company has previously furnished copies thereof in
      sufficient quantity to such Underwriter and the loss, claim, damage or
      liability of such Underwriter results from an untrue statement or omission
      of a material fact contained in the Preliminary Prospectus which was
      identified in writing prior to the date of this Agreement to such
      Underwriter and corrected in the Prospectus.

           (b) Each Underwriter will indemnify and hold harmless the Company and
      Corning against any losses, claims, damages or liabilities to which the
      Company may become subject, under the Act or otherwise, insofar as such
      losses, claims, damages or liabilities (or actions in respect thereof)
      arise out of or are based upon an untrue statement or alleged untrue
      statement of a material fact contained in any Preliminary Prospectus, the
      Registration Statement or the Prospectus, or any amendment or supplement
      thereto, or arise out of or are based upon the omission or alleged
      omission to state therein a material fact required to be stated therein or
      necessary to make the statements therein not misleading, in each case to
      the extent, but only to the extent, that such untrue

                              -26-

                 





      statement or alleged untrue statement or omission or alleged omission was
      made in any Preliminary Prospectus, the Registration Statement or the
      Prospectus or any such amendment or supplement in reliance upon and in
      conformity with written information furnished to the Company by such
      Underwriter through J.P. Morgan Securities Inc. expressly for use therein;
      and will reimburse the Company or Corning for any legal or other expenses
      reasonably incurred by the Company in connection with investigating or
      defending any such action or claim as such expenses are incurred.

           (c) Promptly after receipt by an indemnified party under subsection
      (a) or (b) above of notice of the commencement of any action, such
      indemnified party shall, if a claim in respect thereof is to be made
      against the indemnifying party under such subsection, notify the
      indemnifying party in writing of the commencement thereof; provided,
      however, that in the case of subsection (a)(i) or (b) the omission so to
      notify the indemnifying party shall not relieve it from any liability
      which it may have to any indemnified party otherwise than under such
      subsection; and provided, further that in the case of subsection (a)(ii)
      the omission so to notify the indemnifying party shall relieve the
      indemnifying party from liability only to the extent it is actually
      prejudiced by such omission. In case any such action shall be brought
      against any indemnified party and it shall notify the indemnifying party
      of the commencement thereof, the indemnifying party shall be entitled to
      participate therein and, to the extent that it shall wish, jointly with
      any other indemnifying party similarly notified, to assume the defense
      thereof, with counsel satisfactory to such indemnified party (who shall
      not, except with the consent of the indemnified party, be counsel to the
      indemnifying party), and, after notice from the indemnifying party to such
      indemnified party of its election so to assume the defense thereof, the
      indemnifying party shall not be liable to such indemnified party under
      such subsection for any legal expenses of other counsel or any other
      expenses, in each case subsequently incurred by such indemnified party, in
      connection with the defense thereof other than reasonable costs of
      investigation. No indemnifying party shall, without the written consent of
      the indemnified party, effect the settlement or compromise of, or consent
      to the entry of any judgment with respect to, any pending or threatened
      action or claim in respect of which indemnification or contribution may be
      sought hereunder (whether or not the indemnified party is an actual or
      potential party to such action or claim) unless such settlement,
      compromise or judgment (i) includes an unconditional release of the
      indemnified party from all liability arising out of such action or claim
      and (ii) does not include a statement as to or an admission of fault,
      culpability or a failure to act, by or on behalf of any indemnified party.

           (d) If the indemnification provided for in this Section 8 is
      unavailable to or insufficient to hold harmless an indemnified party under
      subsection (a) or (b)

                              -27-

                 





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

                              -28-

                 





      entitled to contribution from any person who was not guilty of such
      fraudulent misrepresentation. The Underwriters' obligations in this
      subsection (d) to contribute are several in proportion to their respective
      underwriting obligations and not joint.

           (e) The obligations of the Company and Corning under this Section 8
      shall be in addition to any liability which the Company or Corning may
      otherwise have, including under the letter agreement, dated June 13, 1996,
      between Corning and Goldman, Sachs & Co., under the letter agreement,
      dated as of May 14, 1996, between Corning and Lazard Freres & Co. LLC and
      under the letter agreement, dated as of December 11, 1996, between Corning
      and J.P. Morgan Securities Inc., and shall extend, upon the same terms and
      conditions, to each person, if any, who controls any Underwriter within
      the meaning of the Act; and the obligations of the Underwriters under this
      Section 8 shall be in addition to any liability which the respective
      Underwriters may otherwise have and shall extend, upon the same terms and
      conditions, to each officer and director of the Company or Corning
      (including any person who, with his or her consent, is named in the
      Registration Statement as about to become a director of the Company) and
      to each person, if any, who controls the Company within the meaning of the
      Act.

      9. (a) If any Underwriter shall default in its obligation to purchase the
      Securities which it has agreed to purchase hereunder, the non-defaulting
      Underwriters may in their discretion arrange for one or more of the
      non-defaulting Underwriters or another party or other parties to purchase
      such Securities on the terms contained herein. If within thirty-six hours
      after such default by any Underwriter the non-defaulting Underwriters do
      not arrange for the purchase of such Securities, then the Company shall be
      entitled to a further period of thirty-six hours within which to procure
      another party or other parties satisfactory to the non-defaulting
      Underwriters to purchase such Securities on such terms. In the event that,
      within the respective prescribed periods, the non-defaulting Underwriters
      notify the Company that they have so arranged for the purchase of such
      Securities, or the Company notifies the non-defaulting Underwriters that
      it has so arranged for the purchase of such Securities, the non-defaulting
      Underwriters or the Company shall have the right to postpone the Time of
      Delivery for a period of not more than seven days, in order to effect
      whatever changes may thereby be made necessary in the Registration
      Statement or the Prospectus, or in any other documents or arrangements,
      and the Company and Corning, jointly and severally, agree to file promptly
      any amendments to the Registration Statement or the Prospectus which in
      the opinion of the non-defaulting Underwriters may thereby be made
      necessary. The term "Underwriter" as used in this Agreement shall include
      any person

                              -29-

                 





      substituted under this Section with like effect as if such person had
      originally been a party to this Agreement with respect to such Securities.

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

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

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

      11. If this Agreement shall be terminated pursuant to Section 9 hereof,
the Company and Corning shall not then be under any liability to any Underwriter
except as provided in Sections 6 and 8 hereof; but, if for any other reason, the
Securities are

                              -30-

                 





not delivered by or on behalf of the Company as provided herein, the Company
will reimburse the Underwriters for all out-of-pocket expenses, including fees
and disbursements of counsel, reasonably incurred by the Underwriters in making
preparations for the purchase, sale and delivery of the Securities, but the
Company and Corning shall then be under no further liability to any Underwriter
except as provided in Sections 6 and 8 hereof.

      12.  In all dealings hereunder, J.P. Morgan Securities Inc. shall act on 
behalf of each of the Underwriters, and the parties hereto shall be entitled to
act and rely upon any statement, request, notice or agreement on behalf of any 
Underwriter made or given by J.P. Morgan Securities Inc.

      All statements, requests, notices, and agreements hereunder shall be in
writing, and if to the Underwriters shall be delivered or sent by mail, telex or
facsimile transmission to J.P. Morgan Securities Inc., 60 Wall Street, New York,
New York 10260, Attention: Registration Department; and if to the Company shall
be delivered or sent by mail, telex or facsimile transmission to the address of
the Company set forth in the Registration Statement, Attention: Secretary;
provided, however, that any notice to an Underwriter pursuant to Section 8 (c)
hereof shall be delivered or sent by mail, telex or facsimile transmission to
such Underwriter at its address set forth in its Underwriters' Questionnaire, or
telex constituting such Questionnaire, which address will be supplied to the
Company by J.P. Morgan Securities Inc. upon request. Any such statements,
requests, notices or agreements shall take effect upon receipt thereof.

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

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

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

      16.  This Agreement may be executed by any one or more of the parties
hereto in any number of counterparts, each of which shall be deemed to be an

                              -31-

                 





original, but all such respective counterparts shall together constitute one and
the same instrument.

                              -32-

                 





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

                                Very truly yours,

                                    Corning Clinical Laboratories Inc.



                                    By: ......................................
                                        Name:
                                     Title:


                              Corning Incorporated



                                    By: .......................................
                                        Name:
                                     Title:


Accepted as of the date hereof:

J.P. Morgan Securities Inc.



 ................................................
Name:
Title:


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



 ................................................
  (Lazard Freres & Co. LLC)

                              -33-

                 















                            SCHEDULE I



                                                   Principal Amount
                                                    of Securities
           Underwriter                              to be Purchased



J.P. Morgan Securities Inc.............        $
Goldman, Sachs & Co....................
Lazard Freres & Co. LLC................



Total..........................................        $150,000,000
                                                       ============


                              -34-

                 





                                   ANNEX I(a)













    Pursuant to Section 7(g) of the Underwriting Agreement, Price Waterhouse LLP
shall furnish letters to the Underwriters to the effect that

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

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

       (iii) They have made a review in accordance with standards established by
    the American Institute of Certified Public Accountants of the unaudited
    condensed consolidated statements of income, consolidated balance sheets and
    consolidated statements of cash flows included in the Prospectus as
    indicated in their reports thereon copies of which are attached hereto and
    on the basis of specified procedures including inquiries of officials of the
    Company who have responsibility for financial and accounting matters
    regarding whether the unaudited condensed consolidated financial statements
    referred to in paragraph (vi)(A)(i) below comply as to form in all material
    respects with the applicable accounting requirements of the Act and the
    related published rules and regulations, nothing came to their attention
    that cause them to believe that the unaudited condensed consolidated
    financial statements do not comply as to form in all material respects with
    the applicable accounting requirements of the Act and the related published
    rules and regulations;

       (iv) The unaudited selected financial information with respect to the
    consolidated results of operations and financial position of the Company for
    the five most recent fiscal years included in the Prospectus agrees with the


                 





    corresponding amounts (after restatements where applicable) in the audited
    consolidated financial statements for such five fiscal years;

       (v) They have compared the information in the Prospectus under selected
    captions with the disclosure requirements of Regulation S-K and on the basis
    of limited procedures specified in such letter nothing came to their
    attention as a result of the foregoing procedures that caused them to
    believe that this information does not conform in all material respects with
    the disclosure requirements of Items 301, 302, 402 and 503(d), respectively,
    of Regulation S-K;

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

           (A) (i) the unaudited consolidated statements of income, consolidated
       balance sheets and consolidated statements of cash flows included in the
       Prospectus do not comply as to form in all material respects with the
       applicable accounting requirements of the Act and the related published
       rules and regulations, or (ii) any material modifications should be made
       to the unaudited condensed consolidated statements of income,
       consolidated balance sheets and consolidated statements of cash flows
       included in the Prospectus for them to be in conformity with generally
       accepted accounting principles;

           (B) any other unaudited income statement data and balance sheet items
       included in the Prospectus do not agree with the corresponding items in
       the unaudited consolidated financial statements from which such data and
       items were derived, and any such unaudited data and items were not
       determined on a basis substantially consistent with the basis for the
       corresponding amounts in the audited consolidated financial statements
       included in the Prospectus;

           (C) the unaudited financial statements which were not included in the
       Prospectus but from which were derived any unaudited condensed financial
       statements referred to in Clause (A) and any unaudited income statement
       data and balance sheet items included in the Prospectus and referred to
       in


                               2

                 





       Clause (B) were not determined on a basis substantially consistent with
       the basis for the audited consolidated financial statements included in
       the Prospectus;

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

           (E) as of a specified date not more than five days prior to the date
       of such letter, there have been any changes in the consolidated capital
       stock or any increase in the consolidated long-term debt of the Company
       and its subsidiaries, or any decreases in consolidated net current assets
       or stockholders' equity or other items specified by the Underwriters, or
       any increases in any items specified by the Underwriters, in each case as
       compared with amounts shown in the latest balance sheet included in the
       Prospectus, except in each case for changes, increases or decreases which
       the Prospectus discloses have occurred or may occur or which are
       described in such letter; and

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

       (vii) In addition to the examination referred to in their report(s)
    included in the Prospectus and the limited procedures, inspection of minute
    books, inquiries and other procedures referred to in paragraphs (iii) and
    (vi) above, they have carried out certain specified procedures, not
    constituting an examination in accordance with generally accepted auditing
    standards, with respect to certain amounts, percentages and financial
    information specified by the Underwriters, which are derived from the
    general accounting records of the Company and its subsidiaries, which appear
    in the Prospectus, or in Part II of, or in exhibits and schedules to, the
    Registration Statement specified by the Underwriters, and have compared
    certain of such amounts, percentages and financial information with the


                               3

                 




    accounting records of the Company and its subsidiaries and have found them 
    to be in agreement.


                               4