BIO RAD LABORATORIES INC
8-K, 1999-10-15
LABORATORY ANALYTICAL INSTRUMENTS
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   <PAGE>




                   SECURITIES AND EXCHANGE COMMISSION
                         Washington, D.C. 20549

                                FORM 8-K

                             CURRENT REPORT

                PURSUANT TO SECTION 13 OR 15(d) OF THE
                    SECURITIES EXCHANGE ACT OF 1934


   Date of Report (Date of earliest event reported)  October 1, 1999


                     BIO-RAD LABORATORIES, INC.
   _________________________________________________________________
           (Exact Name of Registrant as Specified in Charter)


   A Delaware Corporation             1-7928              94-1381833
   _________________________________________________________________
   (State or Other Jurisdiction     (Commission        (IRS Employer
      of Incorporation)              File  Number)  Identification No.)


   1000 Alfred Nobel Drive, Hercules, California               94547
   _________________________________________________________________
   (Address of Principal Executive Offices)                 (Zip Code)

   Registrant's telephone number, including area code  (510)724-7000


                               No Change
   _________________________________________________________________
     (Former Name or Former Address, if Changed Since Last Report)










   <PAGE>


          ITEM 2.  ACQUISITION OR DISPOSITION OF ASSETS

          (a)  On October 1, 1999, Bio-Rad Laboratories, Inc.
               ("Bio-Rad") acquired Pasteur Sanofi Diagnostics S.A., a
               French corporation ("PSD"), from its former shareholders,
               Sanofi-Synthelabo S.A. and Institut Pasteur, pursuant to the
               terms of the Purchase Agreement (previously filed as Exhibit
               2.1 to Form 8-K dated July 15, 1999). Bio-Rad acquired 100%
               of the capital stock of PSD (and certain ancillary assets
               and assumed liabilities related to PSD) for a purchase price,
               subject to post-closing adjustments, not to exceed
               $210,000,000.  The cash purchase price was financed through
               a $200,000,000 Credit Agreement and a $100,000,000 Senior
               Subordinated Credit Agreement.  The lenders for the Credit
               Agreement include Bank One, NA, as Administrative Agent,
               ABN Bank N.V., as Syndication Agent and Union Bank of
               California, N.A., as Documentation Agent.  The lenders for
               the Senior Subordinated Credit Agreement include Banc One
               Capital Markets, Inc., as Agent.

               PSD and Institut Pasteur have engaged and will continue to
               engage in scientific collaborative relations.  The
               relationship has been formalized in a Cooperation Agreement
               which expires on December 31, 2000.  The Cooperation
               Agreement grants to PSD and its affiliates the right of
               first refusal for an exclusive license to exploit all
               Institut Pasteur patents and know-how in the field of in
               vitro diagnostics (IVD) technology for the duration of the
               licensed patents or 15 years from the first marketing in
               countries where there is no patented technology.  The
               Cooperation Agreement also grants PSD a worldwide exclusive
               license to use the "Pasteur" trademarks in the IVD market.
               PSD's rights to use existing Institut Pasteur intellectual
               property in the IVD field is covered by a License Agreement,
               pursuant to which Institut Pasteur confirmed its grant to
               PSD of exclusive and nonexclusive licenses to manufacture,
               use and sell IVD products presently covered by Institut
               Pasteur patents or know-how.  The License Agreement will
               remain in effect for the life of the corresponding Institut
               Pasteur patents.

          (b)  The physical assets acquired by Bio-Rad, which included
               inventory, plant, property and equipment, were employed by
               PSD in the manufacture and distribution of diagnostic
               products.  Bio-Rad plans to employ these assets in the same
               or similar manner during its ownership.






                                          1
<PAGE>








          ITEM 7.  FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION
                   AND EXHIBITS.

          (a)  Financial statements of businesses acquired.

               The financial statements of PSD required by this Item 7(a)
               are filed herewith as Exhibit 99.1 and Exhibit 99.2 and are
               incorporated herein.

          (b)  Pro forma financial information.

               The pro forma financial information required by this
               Item 7(b) is filed herewith as Exhibit 99.3 and is
               incorporated by reference herein.

          (c)  Exhibits.

               The exhibits to this report are listed in the accompanying
               Index to Exhibits.

































                                          2
<PAGE>







                                      SIGNATURES

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

                                        BIO-RAD LABORATORIES, INC.
                                               (Registrant)


          Date:  October 15, 1999       By: /s/ Thomas C. Chesterman
                                            Thomas C. Chesterman
                                            Vice President and
                                            Chief Financial Officer






































                                          3
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                              BIO-RAD LABORATORIES, INC.

                                  INDEX TO EXHIBITS

                                      ITEM 7(c)

          The following documents are filed as part of this report:

          Exhibit Number      Description

              4.1        Credit Agreement dated as of September 30, 1999
                         among Bio-Rad Laboratories, Inc., the lenders
                         named therein, Banc One, NA, as Administrative
                         Agent, ABN AMRO Bank N.V. as Syndication Agent, and
                         Union Bank of California, N.A. as Documentation
                         Agent.

              4.2        Senior Subordinated Credit Agreement dated as
                         of September 30, 1999 among Bio-Rad Laboratories,
                         Inc., the lenders named therein and Banc One
                         Capital Markets, Inc., as Agent.

             23.1        Report of Independent Public Accountant

             99.1        Consolidated Balance Sheets of Pasteur Sanofi
                         Diagnostics S.A. and Subsidiaries(PSD) as of
                         December 31, 1998 and 1997 and the related
                         consolidated statements of operations,
                         stockholders' equity and cash flows for each of
                         the three years in the period ended December 31,
                         1998 together with the report of PSD's
                         independent auditors thereon.

             99.2        Unaudited Consolidated Balance Sheet of Pasteur
                         Sanofi Diagnostics S.A. and Subsidiaries as of
                         June 30, 1999 and the related consolidated
                         statements of operations, stockholders' equity and
                         cash flows for the six month period ended
                         June 30,1999.

             99.3        Unaudited Pro Forma Condensed Consolidated
                         Financial Information.



<PAGE>


                                                            EXHIBIT 4.1




                             CREDIT AGREEMENT



                       dated as of September 30, 1999


                                  among


                         BIO-RAD LABORATORIES, INC.,


                               THE LENDERS,


                               BANK ONE, NA,
                         as Administrative Agent,


                            ABN AMRO BANK N.V.
                           as Syndication Agent,


                                   and


                       UNION BANK OF CALIFORNIA, N.A.
                          as Documentation Agent



   <PAGE>


                            TABLE OF CONTENTS


   SECTION                                                       PAGE

   ARTICLE I
       DEFINITIONS..................................................1

   ARTICLE II
       THE CREDITS.................................................20
       2.1.   The Loans............................................20
              2.1.1 Term Loans.................................... 20
              2.1.2 Revolving Loans................................20
       2.2.   Repayment............................................21
              2.2.1. Term Loans....................................21
              2.2.2. Revolving Loans...............................22
       2.3.   Ratable Loans; Types of Advances.....................22
       2.4.   Letters of Credit....................................22
              2.4.1. Letter of Credit Facility.....................22
              2.4.2. Letter of Credit Participation................22
              2.4.3. Reimbursement Obligation......................23
              2.4.4. Cash Collateral...............................23
              2.4.5. Letter of Credit Fees.........................24
              2.4.6. Indemnification; Exoneration..................24
              2.4.7. Transitional Letter of Credit Provisions......25
       2.5.   Commitment Fee; Reductions in Aggregate Commitment...25
       2.6.   Minimum Amount of Each Advance.......................26
       2.7.   Prepayments..........................................26
              2.7.1. Optional Principal Payments...................26
              2.7.2.  Mandatory Prepayments of the Term Loans......26
       2.8.   Method of Selecting Types and Interest Periods
               for New Advances....................................28
       2.9.   Conversion and Continuation of Outstanding Advances..28
       2.10.  Changes in Interest Rate, etc........................29
       2.11.  Rates Applicable After Default.......................29
       2.12.  Method of Payment....................................30
       2.13.  Noteless Agreement; Evidence of Indebtedness.........30
       2.14.  Telephonic Notices...................................32
       2.15.  Interest Payment Dates; Interest and Fee Basis.......32
       2.16.  Notification of Advances, Interest Rates,
               Prepayments and Commitment Reductions...............33
       2.17.  Lending Installations................................33
       2.18.  Non-Receipt of Funds by the Agent....................33
       2.19.  Replacement of Lender................................33
       2.20.  Market Disruption....................................34

   <PAGE>

       2.21.  Judgment Currency....................................34

   ARTICLE III
       YIELD PROTECTION; TAXES.....................................35
       3.1.   Yield Protection.....................................35
       3.2.   Changes in Capital Adequacy Regulations..............36
       3.3.   Availability of Types of Advances....................36
       3.4.   Funding Indemnification..............................36
       3.5.   Taxes................................................37
       3.6.   Lender Statements; Survival of Indemnity.............39

   ARTICLE IV
       CONDITIONS PRECEDENT........................................40
       4.1.   Initial Advance......................................40
       4.2.   Each Advance and Letter of Credit....................40

   ARTICLE V
       REPRESENTATIONS AND WARRANTIES..............................41
       5.1.   Existence and Standing...............................41
       5.2.   Authorization and Validity...........................41
       5.3.   No Conflict; Government Consent......................41
       5.4.   Financial Statements.................................42
       5.5.   Material Adverse Change..............................42
       5.6.   Taxes................................................42
       5.7.   Litigation and Contingent Obligations................43
       5.8.   Subsidiaries.........................................43
       5.9.   ERISA................................................43
       5.10.  Accuracy of Information..............................43
       5.11.  Regulation U.........................................43
       5.12.  Material Agreements..................................43
       5.13.  Compliance With Laws.................................44
       5.14.  Ownership of Properties..............................44
       5.15.  Plan Assets; Prohibited Transactions.................44
       5.16.  Environmental Matters................................44
       5.17.  Investment Company Act...............................45
       5.18.  Public Utility Holding Company Act...................45
       5.19.  Year 2000............................................45
       5.20.  Subordinated Indebtedness............................45
       5.21.  Post-Retirement Benefits.............................45
       5.22.  Insurance............................................45
       5.23.  The PSD Acquisition..................................45
       5.24.  Solvency.............................................46

                                      ii
   <PAGE>

   ARTICLE VI
       COVENANTS...................................................47
       6.1.   Financial Reporting..................................47
       6.2.   Use of Proceeds......................................48
       6.3.   Notice of Default....................................48
       6.4.   Conduct of Business..................................49
       6.5.   Taxes................................................49
       6.6.   Insurance; Insurance and Condemnation Proceeds.......49
       6.7.   Compliance with Laws.................................50
       6.8.   Maintenance of Properties............................50
       6.9.   Inspection...........................................51
       6.10.  Dividends............................................51
       6.11.  Indebtedness.........................................51
       6.12.  Merger...............................................52
       6.13.  Sale of Assets.......................................52
       6.14.  Investments and Acquisitions.........................53
       6.15.  Liens................................................54
       6.16.  Capital Expenditures.................................55
       6.17.  Limitation on Negative Pledge Clauses and Payment
               Restrictions Affecting Subsidiaries.................55
       6.18.  Year 2000............................................57
       6.19.  Affiliates...........................................57
       6.20.  Unfunded Liabilities.................................57
       6.21.  Subordinated Indebtedness............................57
       6.22.  Required Rate Management Transactions................57
       6.23.  Sale and Leaseback Transactions......................58
       6.24.  Contingent Obligations...............................58
       6.25.  Financial Contracts..................................58
       6.26.  Financial Covenants..................................58
              6.26.1.  Interest Coverage Ratio.....................58
              6.26.2.  Fixed Charge Coverage Ratio.................58
              6.26.3.  Leverage Ratio..............................59
              6.26.4.  Senior Leverage Ratio.......................59
              6.26.5.  Minimum Net Worth...........................59
              6.26.6.  Pro Forma Calculation.......................59
       6.27.  Fiscal Year..........................................59
       6.28.  Guarantors; Pledges of Stock of Foreign
               Subsidiaries........................................60
       6.29.  Future Liens on Real Property........................60
       6.30.  Surveys of Mortgaged Property........................61

   ARTICLE VII
       DEFAULTS....................................................61

                                      iii
   <PAGE>

   ARTICLE VIII
       ACCELERATION, WAIVERS, AMENDMENTS AND REMEDIES..............64
       8.1.   Acceleration.........................................64
       8.2.   Amendments...........................................64
       8.3.   Preservation of Rights...............................66

   ARTICLE IX
       GENERAL PROVISIONS..........................................66
       9.1.   Survival of Representations..........................66
       9.2.   Governmental Regulation..............................66
       9.3.   Headings.............................................66
       9.4.   Entire Agreement.....................................66
       9.5.   Several Obligations; Benefits of this Agreement......66
       9.6.   Expenses; Indemnification............................67
       9.7.   Numbers of Documents.................................67
       9.8.   Accounting...........................................67
       9.9.   Severability of Provisions...........................67
       9.10.  Nonliability of Lenders..............................67
       9.11.  Confidentiality......................................68
       9.12.  Disclosure...........................................69
       9.13.  Performance of Obligations...........................69
       9.14.  Waiver of Notice.....................................69

   ARTICLE X
       THE AGENT...................................................70
       10.1.  Appointment; Nature of Relationship..................70
       10.2.  Powers...............................................70
       10.3.  General Immunity.....................................70
       10.4.  No Responsibility for Loans, Recitals, etc...........70
       10.5.  Action on Instructions of Lenders....................71
       10.6.  Employment of Agents and Counsel.....................71
       10.7.  Reliance on Documents; Counsel.......................71
       10.8.  Agent's Reimbursement and Indemnification............71
       10.9.  Notice of Default....................................72
       10.10. Rights as a Lender...................................72
       10.11. Lender Credit Decision...............................72
       10.12. Successor Agent......................................72
       10.13. Agent's Fee..........................................73
       10.14. Delegation to Affiliates.............................73
       10.15. Execution of Collateral Documents....................73
       10.16. Collateral Releases..................................73
       10.17. Co-Agents, etc.......................................74

                                      iv
   <PAGE>

   ARTICLE XI
       SETOFF; RATABLE PAYMENTS....................................74
       11.1.  Setoff...............................................74
       11.2.  Ratable Payments.....................................74
       11.3.  Application of Payments..............................74
       11.4.  Relations Among Lenders..............................75

   ARTICLE XII
       BENEFIT OF AGREEMENT; ASSIGNMENTS; PARTICIPATIONS...........76
       12.1.  Successors and Assigns...............................76
       12.2.  Participations.......................................76
              12.2.1.  Permitted Participants; Effect..............76
              12.2.2.  Voting Rights...............................77
              12.2.3.  Benefit of Setoff...........................77
       12.3.  Assignments..........................................77
              12.3.1.  Permitted Assignments.......................77
              12.3.2.  Effect; Effective Date......................78
       12.4.  Dissemination of Information.........................78
       12.5.  Tax Treatment........................................78

   ARTICLE XIII
       NOTICES.....................................................79
       13.1.  Notices..............................................79
       13.2.  Change of Address....................................79

   ARTICLE XIV
       COUNTERPARTS................................................79

   ARTICLE XV
       CHOICE OF LAW; CONSENT TO JURISDICTION; WAIVER OF JURY
        TRIAL......................................................79
       15.1.  CHOICE OF LAW........................................79
       15.2.  CONSENT TO JURISDICTION..............................80
       15.3.  WAIVER OF JURY TRIAL.................................80

                                       v
   <PAGE>


   EXHIBITS

   Exhibit A       -    Form of Compliance Certificate
   Exhibit B       -    Form of Assignment Agreement
   Exhibit C-1     -    Form of Term Note
   Exhibit C-2     -    Form of Revolving Note

   SCHEDULES

   Pricing Schedule
   Schedule 2.4    -    Existing Letters of Credit
   Schedule 4.1    -    List of Closing Documents
   Schedule 5.4    -    Pro Forma Financial Statements
   Schedule 5.7    -    Litigation
   Schedule 5.8    -    Subsidiaries
   Schedule 5.22   -    Insurance
   Schedule 6.11   -    Indebtedness
   Schedule 6.14   -    Investments
   Schedule 6.15   -    Liens

                                      vi
   <PAGE>


                               CREDIT AGREEMENT

            This Agreement, dated as of September 30, 1999, is among
   Bio-Rad Laboratories, Inc., the Lenders, Bank One, NA, having its
   principal office in Chicago, Illinois, as Administrative Agent,
   ABN AMRO Bank N.V., as Syndication Agent, and Union Bank of
   California, N.A., as Documentation Agent.  The parties hereto
   agree as follows:


                                   ARTICLE I

                                  DEFINITIONS


            As used in this Agreement:

            "Acquired Business" is defined in the definition of "PSD
   Acquisition."

            "Acquired Indebtedness" means Indebtedness of any Person
   existing at the time such Person becomes a Subsidiary or is
   merged or consolidated into the Borrower or one of its Subsidiaries.

            "Acquisition" means any transaction, or any series of
   related transactions, consummated on or after the date of this
   Agreement, by which the Borrower or any of its Subsidiaries (i)
   acquires any going business or all or substantially all of the
   assets of any firm, corporation or limited liability company, or
   division thereof, whether through purchase of assets, merger or
   otherwise or (ii) directly or indirectly acquires (in one
   transaction or as the most recent transaction in a series of
   transactions) at least a majority (in number of votes) of the
   securities of a corporation which have ordinary voting power for
   the election of directors (other than securities having such
   power only by reason of the happening of a contingency) or a
   majority (by percentage or voting power) of the outstanding
   ownership  interests of a partnership or limited liability
   company.

            "Advance" means a borrowing hereunder, (i) made by the
   Lenders on the same Borrowing Date, or (ii) converted or
   continued by the Lenders on the same date of conversion or
   continuation, consisting, in either case, of the aggregate amount
   of the several Loans of the same Type and, in the case of
   Eurocurrency Loans, in the same currency and for the same
   Interest Period.

            "Affiliate" of any Person means any other Person directly or
   indirectly controlling, controlled by or under common control
   with such Person.  A Person shall be deemed to control another
   Person if the controlling Person owns 20% or more of any class of
   voting securities (or other ownership interests) of the
   controlled Person or possesses, directly or indirectly, the power
   to direct or cause the direction of the management or policies of
   the controlled Person, whether through ownership of stock, by
   contract or otherwise.  Any member of the Schwartz Group shall be
   deemed to be an Affiliate of the Borrower.

   <PAGE>

            "Agent" means Bank One in its capacity as contractual
   representative of the Lenders pursuant to Article X, and not in
   its individual capacity as a Lender, and any successor Agent
   appointed pursuant to Article X.

            "Aggregate Commitment" means the aggregate of the
   Commitments of all the Lenders, as reduced from time to time
   pursuant to the terms hereof.

            "Agreed Currencies" means (i) Dollars and (ii) so long as
   such currency remains an Eligible Currency, the Euro.

            "Agreement" means this credit agreement, as it may be
   amended or modified and in effect from time to time.

            "Agreement Accounting Principles" means generally accepted
   accounting principles as in effect from time to time.

            "Alternate Base Rate" means, for any day, a rate of interest
   per annum equal to the higher of (i) the Corporate Base Rate for
   such day and (ii) the sum of the Federal Funds Effective Rate for
   such day plus 1/2% per annum.

            "Applicable Fee Rate" means, at any time, the percentage
   rate per annum at which commitment fees or letter of credit fees
   are accruing on the unused portion of the Aggregate Commitment or
   on the amount available for drawing under outstanding Letters of
   Credit, respectively, at such time as set forth in the Pricing
   Schedule.

            "Applicable Margin" means, with respect to Advances of any
   Type at any time, the percentage rate per annum which is
   applicable at such time with respect to Advances of such Type as
   set forth in the Pricing Schedule.

            "Applicable Percentage" means, (i) with respect to Excess
   Cash Flow for any fiscal year of the Borrower, 90% if the
   Leverage Ratio as of the last day of such fiscal year was greater
   than or equal to 4.00 to 1; 75% if the Leverage Ratio as of the
   last day of such fiscal year was greater than or equal to 3.50 to
   1 and less than 4.00 to 1; 50% if the Leverage Ratio as of the
   last day of such fiscal year was greater than or equal to 3.00 to
   1 and less than 3.50 to 1; and 0% if the Leverage Ratio as of the
   last day of such fiscal year was less than 3.00 to 1; and (ii)
   with respect to any Asset Sale, 50% if the Leverage Ratio as of
   the last day of the most recently ended fiscal period for which
   the Borrower has delivered financial statements pursuant to
   Section 6.1(i) or (ii) was greater than or equal to 3.50 to 1;
   25% if the Leverage ratio as of the last day of such fiscal
   period was greater than or equal to 3.00 to 1 and less than 3.50
   to 1; and 0% if the Leverage Ratio as of the last day of such
   fiscal period was less than 3.00 to 1; provided that, with
   respect to any Asset Sale, the Leverage Ratio shall be deemed to
   be greater than or equal to 3.50 to 1 until the Borrower shall
   have delivered annual financial statements pursuant to Section
   6.1(i) for the fiscal year ending December 31, 1999.

                                       2
   <PAGE>

            "Arranger" means Banc One Capital Markets, Inc., a Delaware
   corporation, and its successors.

            "Article" means an article of this Agreement unless another
   document is specifically referenced.

            "Asset Sale" means, with respect to any Person, the sale,
   conveyance, disposition or other transfer by such Person of any
   of its assets (including by way of a sale-leaseback transaction
   and including the sale or other transfer of any of the Equity
   Interests of any Subsidiary of such Person), other than the sale
   of inventory in the ordinary course of business and of obsolete
   or worn-out property in the ordinary course of business, the
   exchange or trade-in of equipment and other assets for
   replacement assets and the granting of a nonexclusive license.
   "Asset Sale" shall not include (i) any casualty to or
   condemnation of property to which Section 6.6 applies, whether
   the proceeds thereof are Excluded Proceeds or otherwise, or (ii)
   the sale, conveyance, disposition or other transfer by a Foreign
   Subsidiary of any of its assets to the extent that the Net Cash
   Proceeds thereof are invested in assets or property (other than
   Cash Equivalent Investments) in any Foreign Subsidiary's business
   within twelve months after such sale, conveyance, disposition or
   other transfer.

            "Authorized Officer" means any of the Chairman, President,
   any Vice President, Chief Financial Officer or Treasurer of the
   Borrower, acting singly, provided that the Agent shall have
   received an incumbency certificate identifying such officer by
   name and title and bearing such officer's signature.

            "Available Net Cash Proceeds" is defined in Section
   2.7.2(a).

            "Bank One" means Bank One, NA, having its principal office
   in Chicago, Illinois, in its individual capacity, and its
   successors.

            "Borrower" means Bio-Rad Laboratories, Inc., a Delaware
   corporation, and its successors and assigns.

            "Borrowing Date" means a date on which an Advance is made
   hereunder.

            "Borrowing Notice" is defined in Section 2.8.

            "Bridge Loan" means the bridge loan in the initial principal
   amount of $100,000,000 made to the Borrower on the Closing Date
   pursuant to the Bridge Loan Agreement, including any increase in
   such principal amount as a result of the capitalization of
   interest thereon and including any Rollover Bridge Notes and
   Exchange Notes, as defined in the Bridge Loan Agreement; provided
   that the Exchange Notes shall be issued pursuant to an indenture
   all of the terms and conditions of which are reasonably
   acceptable to the Agent and the Required Lenders, and provided
   further that terms and conditions substantially similar to those
   contained in the Description of Notes shall be deemed to be
   reasonably acceptable.

                                      3
   <PAGE>

            "Bridge Loan Agreement" means the Senior Subordinated Credit
   Agreement dated as of September 30, 1999 among the Borrower, the
   lenders named therein and Banc One Capital Markets, Inc., as
   agent for such lenders, together with any notes issued pursuant
   thereto.

            "Business Day" means (i) with respect to any borrowing,
   payment or rate selection of Eurocurrency Advances, a day (other
   than a Saturday or Sunday) on which banks generally are open in
   Chicago, New York and Los Angeles for the conduct of
   substantially all of their commercial lending activities,
   interbank wire transfers can be made on the Fedwire system and
   dealings in Dollars and the other Agreed Currencies are carried
   on in the London interbank market (and, if the Advances which are
   the subject of such borrowing, payment or rate selection are
   denominated in Euro, a day upon which such clearing system as is
   determined by the Agent to be suitable for clearing or settlement
   of the Euro is open for business) and (ii) for all other
   purposes, a day (other than a Saturday or Sunday) on which banks
   generally are open in Chicago for the conduct of substantially
   all of their commercial lending activities and interbank wire
   transfers can be made on the Fedwire system.

            "Capital Expenditures" means, without duplication, any
   expenditures for any purchase or other acquisition of any asset
   which would be classified as a fixed or capital asset on a
   consolidated balance sheet of the Borrower and its Subsidiaries
   prepared in accordance with Agreement Accounting Principles,
   excluding (i) the trade-in value of equipment or other assets
   exchanged for replacement assets, (ii) expenditures of insurance
   proceeds to rebuild or replace any asset after a casualty loss,
   (iii) the PSD Acquisition and (iv) Permitted Acquisitions.

            "Capitalized Lease" of a Person means any lease of Property
   by such Person as lessee which would be capitalized on a balance
   sheet of such Person prepared in accordance with Agreement
   Accounting Principles.

            "Capitalized Lease Obligations" of a Person means the amount
   of the obligations of such Person under Capitalized Leases which
   would be shown as a liability on a balance sheet of such Person
   prepared in accordance with Agreement Accounting Principles.

            "Cash Equivalent Investments" means (i) direct obligations
   issued or fully guaranteed by the United States of America or
   issued by any agency thereof and backed by the full faith and
   credit of the United States, in each case maturing within one
   year from the date of acquisition thereof, (ii) commercial paper
   rated A-1 or better by S&P or P-1 or better by Moody's, (iii)
   demand deposit accounts maintained in the ordinary course of
   business, (iv) certificates of deposit issued by and time
   deposits with commercial banks (whether domestic or foreign)
   having capital and surplus in excess of $100,000,000 and (v)
   mutual funds that invest solely in one or more of the types of
   investments described in clauses (i)-(iv) above; provided in each
   case that the same provides for payment of both principal and
   interest (and not principal alone or interest alone) and is not
   subject to any contingency regarding the payment of principal or
   interest.

            "Change in Control" means:

                                      4
   <PAGE>

            (i)  any merger or consolidation of the Borrower with
   or into any Person or any sale, transfer or other
   conveyance, whether direct or indirect, of all or
   substantially all of the Borrower's assets, on a
   consolidated basis, in one transaction or a series of
   related transactions, if, immediately after giving effect to
   such transaction(s), either (x) any "person" or "group"
   (other than a member of the Schwartz Group) is or becomes
   the "beneficial owner," directly or indirectly, of more than
   40% of the Voting Equity Interests of the transferee(s) or
   surviving entity or entities, and the Schwartz Group shall
   cease to own beneficially at least a greater percentage of
   the Voting Equity Interests of the transferee(s) or
   surviving entity or entities or (y) the Schwartz Group shall
   cease to own beneficially (A) 30% of the Voting Equity
   Interests of such transferee(s) or surviving entity or
   entities or (B) a greater percentage of the Voting Equity
   Interests of such transferee(s) or surviving entity or
   entities than any other person or group, whichever is less;

            (ii)  any "person" or "group" (other than a member of
   the Schwartz Group) is or becomes the "beneficial owner,"
   directly or indirectly, of more than 40% of the Borrower's
   Voting Equity Interests, and the Schwartz Group shall cease
   to own beneficially at least a greater percentage of the
   Borrower's Voting Equity Interests;

            (iii)  the Continuing Directors cease for any reason to
   constitute a majority of the Borrower's Board of Directors
   then in office;

            (iv)  the Borrower adopts a plan of liquidation or
   dissolution; or

            (v)  any "Change in Control" or "Change of Control" as
   defined in any agreement governing Subordinated Indebtedness
   occurs and as a result thereof the Borrower is required to prepay
   or repurchase, or make an offer to prepay or repurchase, such
   Subordinated Indebtedness.

            "Closing Date" means the date on which the PSD Acquisition
   closes and the initial Advances are made under this Agreement.

            "Code" means the Internal Revenue Code of 1986, as amended,
   reformed or otherwise modified from time to time.

            "Collateral" means all property and interests in property
   now owned or hereafter acquired by the Borrower or any of its
   Subsidiaries in or upon which a security interest, lien or
   mortgage is granted to the Agent, for the benefit of the Holders
   of Secured Obligations, or to the Agent, for the benefit of the
   Lenders, whether under any Collateral Document or under any of
   the other Loan Documents.

            "Collateral Documents" means, collectively, all agreements,
   instruments and documents executed in connection with this
   Agreement that are intended to create or evidence Liens to secure
   the Secured Obligations or any Guaranty of the Secured Obligations,
   including, without limitation, all security agreements, pledge
   agreements, mortgages, deeds of trust, powers, assignments and financing

                                      5
   <PAGE>

   statements, whether heretofore, now, or hereafter executed by or on
   behalf of the Borrower or any of its Subsidiaries and delivered to the
   Agent or any of the Lenders, together with all agreements and documents
   referred to therein or contemplated thereby.

            "Commitment" means, for each Lender, the obligation of such
   Lender pursuant to Section 2.1.2 to make Revolving Loans and
   pursuant to Section 2.4.2 to purchase participations in Letters
   of Credit not exceeding the amount set forth opposite its
   signature below or as set forth in any Notice of Assignment
   relating to any assignment that has become effective pursuant to
   Section 12.3.2, as such amount may be modified from time to time
   pursuant to the terms hereof.

            "Computation Date" is defined in Section 2.1.2(b).

            "Consolidated Capital Expenditures" means, with reference to
   any period, the Capital Expenditures of the Borrower and its
   Subsidiaries calculated on a consolidated basis for such period.

            "Consolidated EBITDA" means, with reference to any period,
   Consolidated Net Income for such period  plus, to the extent
   deducted from revenues in determining Consolidated Net Income
   (without duplication), (i) Consolidated Interest Expense and all
   non-cash interest expense, (ii) expense for income taxes paid or
   accrued, (iii) depreciation, (iv) amortization, (v) extraordinary
   losses incurred other than in the ordinary course of business and
   losses from discontinued operations, (vi) any extraordinary,
   unusual or non-recurring non-cash expenses or non-cash losses,
   and (vii) non-recurring cash charges, including any capitalized
   non-recurring cash charges, taken on or prior to March 31, 2000
   resulting from severance, integration and other adjustments made
   as a result of the PSD Acquisition (provided that the amounts
   referred to in this clause (vii) shall not, in the aggregate,
   exceed $25,000,000), and minus, to the extent included in
   Consolidated Net Income, extraordinary gains and gains from
   discontinued operations, all net of tax, realized other than in
   the ordinary course of business, all calculated for the Borrower
   and its Subsidiaries on a consolidated basis for such period.

            "Consolidated Funded Indebtedness" means at any time,
   without duplication, the aggregate dollar amount of (i)
   Indebtedness (other than Rate Management Obligations and similar
   obligations under other Financial Contracts) of the Borrower and
   its Subsidiaries which has actually been funded and is
   outstanding at such time, whether or not such amount is due and
   payable at such time,  plus (ii) undrawn amounts available under
   standby letters of credit, all calculated on a consolidated basis
   as of such time.

            "Consolidated Interest Expense" means, with reference to any
   period, the cash interest expense of the Borrower and its
   Subsidiaries calculated on a consolidated basis for such period.

            "Consolidated Net Income" means, with reference to any
   period, the net income (or loss) of the Borrower and its
   Subsidiaries calculated on a consolidated basis for such period.

            "Consolidated Net Worth" means at any time the consolidated

                                      6
   <PAGE>

   stockholders' equity of the Borrower and its Subsidiaries
   calculated on a consolidated basis as of such time, but without
   regard to foreign currency translation adjustments made after
   September 30, 1999.

            "Contingent Obligation" of a Person means any agreement,
   undertaking or arrangement by which such Person assumes,
   guarantees, endorses, contingently agrees to purchase or provide
   funds for the payment of, or otherwise becomes or is contingently
   liable upon, the Indebtedness of any other Person, or agrees to
   maintain the net worth or working capital or other financial
   condition of any other Person, or otherwise assures any creditor
   of such other Person against loss, including, without limitation,
   any comfort letter or material take-or-pay contract.

            "Continuing Directors" means, during any period of 12
   consecutive months after the Closing Date, individuals who at the
   beginning of any such 12-month period constituted the Borrower's
   Board of Directors (together with any new directors whose
   election by such Board of Directors or whose nomination for
   election by the Borrower's shareholders was approved by a vote of
   a majority of the directors then still in office who were either
   directors at the beginning of such period or whose election or
   nomination for election was previously so approved, including new
   directors designated in or provided for in an agreement regarding
   the merger, consolidation or sale, transfer or other conveyance,
   of all or substantially all of the assets of the Borrower, if
   such agreement was approved by a vote of such majority of
   directors).

            "Conversion/Continuation Notice" is defined in Section 2.9.

            "Controlled Group" means all members of a controlled group
   of corporations or other business entities and all trades or
   businesses (whether or not incorporated) under common control
   which, together with the Borrower or any of its Subsidiaries, are
   treated as a single employer under Section 414 of the Code.

            "Corporate Base Rate" means a rate per annum equal to the
   corporate base rate of interest announced by Bank One from time
   to time, changing when and as said corporate base rate changes.

            "Default" means an event described in Article VII.

            "Description of Notes" means the section entitled
   "Description of Notes" contained in the Borrower's Preliminary
   Offering Memorandum, dated September 15, 1999, with respect to
   $125,000,000 of __% Senior Subordinated Notes due 2009.

            "Dollar Amount" of any currency at any date shall mean (i)
   the amount of such currency if such currency is Dollars or (ii)
   the equivalent in Dollars of the amount of such currency if such
   currency is any currency other than Dollars, calculated on the
   basis of the arithmetical mean of the buy and sell spot rates of
   exchange of the Agent for such currency on the London market at
   11:00 a.m., London time, on or as of the most recent Computation
   Date provided for in Section 2.1.2(b).

            "Dollars" and "$" shall mean the lawful currency of the
   United States of America.

                                      7
   <PAGE>

            "Domestic Subsidiary" means a Subsidiary organized under the
   laws of the United States of America, any State thereof or the
   District of Columbia.

            "Eligible Currency" means any currency other than Dollars
   (i) that is readily available, (ii) that is freely traded, (iii)
   in which deposits are customarily offered to banks in the London
   interbank market, (iv) which is convertible into Dollars in the
   international interbank market and (v) as to which an Equivalent
   Amount may be readily calculated.

            "Environmental Laws" means any and all federal, state, local
   and foreign statutes, laws, judicial decisions, regulations,
   ordinances, rules, judgments, orders, decrees, plans,
   injunctions, permits, concessions, grants, franchises, licenses,
   agreements and other governmental restrictions relating to (i)
   the protection of the environment, (ii) the effect of the
   environment on human health, (iii) emissions, discharges or
   releases of pollutants, contaminants, hazardous substances or
   wastes into surface water, ground water or land, or (iv) the
   manufacture, processing, distribution, use, treatment, storage,
   disposal, transport or handling of pollutants, contaminants,
   hazardous substances or hazardous wastes or the clean-up or other
   remediation thereof.

            "Equity Interests" means (i) in the case of a corporation,
   corporate stock, (ii) in the case of a limited liability company,
   association or business entity, any and all shares, interests,
   participations, ownership or voting rights or other equivalents
   (however designated) of corporate stock, (iii) in the case of a
   partnership, partnership interests (whether general or limited)
   and (iv) any other interest or participation that confers on a
   Person the right to receive a share of the profits and losses of,
   or distributions of assets of, the issuing Person, in each case
   regardless of class or designation, and all warrants, options,
   purchase rights, conversion or exchange rights, voting rights,
   calls or claims of any character with respect thereto.

            "Equivalent Amount" of any currency with respect to any
   amount of Dollars at any date shall mean the equivalent in such
   currency of such amount of Dollars, calculated on the basis of
   the arithmetical mean of the buy and sell spot rates of exchange
   of the Agent for such other currency at 11:00 a.m., London time,
   on the date on or as of which such amount is to be determined.

            "ERISA" means the Employee Retirement Income Security Act of
   1974, as amended from time to time, and any rule or regulation
   issued thereunder.

            "Euro" and/or "EUR" means the euro referred to in Council
   Regulation (EC) No. 1103/97 dated June 17, 1997 passed by the
   Council of the European Union, or, if different, the then lawful
   currency of the member states of the European Union that
   participate in the third stage of Economic and Monetary Union.

            "Eurocurrency" means any Agreed Currency.

            "Eurocurrency Advance" means an Advance which, except as

                                     8
   <PAGE>

   otherwise provided in Section 2.11, bears interest at the applicable
   Eurocurrency Rate.

            "Eurocurrency Loan" means a Loan which, except as otherwise
   provided in Section 2.11, bears interest at the applicable
   Eurocurrency Rate.

            "Eurocurrency Payment Office" of the Agent shall mean, for
   each of the Agreed Currencies, Bank One, Chicago, Illinois, or
   such other office, branch, affiliate or correspondent bank of the
   Agent as it may from time to time specify to the Borrower and
   each Lender as its Eurocurrency Payment Office.

            "Eurocurrency Rate" means, with respect to a Eurocurrency
   Advance for the relevant Interest Period, the sum of (i) the
   quotient of (a) the Eurocurrency Reference Rate applicable to
   such Interest Period, divided by (b) one minus the Reserve
   Requirement (expressed as a decimal) applicable to such Interest
   Period, plus (ii) the Applicable Margin.  The Eurocurrency Rate
   shall be rounded to the next higher multiple of 1/16 of 1% if the
   rate is not such a multiple.

            "Eurocurrency Reference Rate" means, with respect to a
   Eurocurrency Advance for the relevant Interest Period, the
   applicable British Bankers' Association Interest Settlement Rate
   for deposits in the applicable Agreed Currency appearing on
   Reuters Screen FRBD as of 11:00 a.m. (London time) two Business
   Days prior to the first day of such Interest Period, and having a
   maturity equal to such Interest Period, provided that, (i) if
   Reuters Screen FRBD is not available to the Agent for any reason,
   the applicable Eurocurrency Reference Rate for the relevant
   Interest Period shall instead be the applicable British Bankers'
   Association Interest Settlement Rate for deposits in the
   Applicable Agreed Currency as reported by any other generally
   recognized financial information service as of 11:00 a.m. (London
   time) two Business Days prior to the first day of such Interest
   Period, and having a maturity equal to such Interest Period, and
   (ii) if no such British Bankers' Association Interest Settlement
   Rate is available, the applicable Eurocurrency Reference Rate for
   the relevant Interest Period shall instead be the rate determined
   by the Agent to be the rate at which Bank One offers to place
   deposits in the applicable Agreed Currency with first-class banks
   in the London interbank market at approximately 11:00 a.m.
   (London time) two Business Days prior to the first day of such
   Interest Period, in the approximate amount of Bank One's relevant
   Eurocurrency Loan and having a maturity equal to such Interest
   Period.

            "Excess Cash Flow" means, for any fiscal year of the
   Borrower, an amount equal to the Borrower's (i) Consolidated
   EBITDA for such period, minus (ii) income taxes paid in cash for
   such period, minus (iii) Consolidated Capital Expenditures paid
   in cash during such period, minus (iv) Consolidated Interest
   Expense for such period, minus (v) all payments of the principal
   portion of the Term Loans and scheduled amortization of the
   principal portion of all other term Indebtedness of the Borrower
   and its Subsidiaries during such period, minus (vi) cash payments
   in respect of extraordinary and nonrecurring items, minus (vii)
   the increase (or plus the decrease) in Working Capital during
   such period, in each case as calculated in accordance with
   Agreement Accounting Principles.

                                      9
   <PAGE>

            "Excluded Taxes" means, in the case of each Lender or
   applicable Lending Installation and the Agent, taxes imposed on
   or measured by its overall net income or profits, and franchise
   taxes imposed on it, by (i) the jurisdiction under the laws of
   which such Lender or the Agent is incorporated or organized or
   any political subdivision thereof or (ii) the jurisdiction in
   which the Agent's or such Lender's principal executive office or
   such Lender's applicable Lending Installation is located or any
   political subdivision thereof.

            "Exhibit" refers to an exhibit to this Agreement, unless
   another document is specifically referenced.

                                      10
   <PAGE>

            "Existing Credit Agreement" means that certain Credit
   Agreement dated as of May 15, 1998, as amended, among the
   Borrower, the lenders party thereto and Bank One (formerly known
   as The First National Bank of Chicago), as agent.

            "Existing Letters of Credit" is defined in Section 2.4.7.

            "Facility Termination Date" means September 30, 2004 or any
   earlier date on which the Aggregate Commitment is reduced to zero
   or otherwise terminated pursuant to the terms hereof.

            "Federal Funds Effective Rate" means, for any day, an
   interest rate per annum equal to the weighted average of the
   rates on overnight Federal funds transactions with members of the
   Federal Reserve System arranged by Federal funds brokers on such
   day, as published for such day (or, if such day is not a Business
   Day, for the immediately preceding Business Day) by the Federal
   Reserve Bank of New York, or, if such rate is not so published
   for any day which is a Business Day, the average of the
   quotations at approximately 10:00 a.m. (Chicago time) on such day
   on such transactions received by the Agent from three Federal
   funds brokers of recognized standing selected by the Agent in its
   sole discretion.

            "Financial Contract" of a Person means (i) any exchange-
   traded or over-the-counter futures, forward, swap or option
   contract or other financial instrument with similar
   characteristics or (ii) any Rate Management Transaction.

            "Financing" means, with respect to any Person, the issuance
   or sale by such Person of any Equity Interests of such Person or
   any Indebtedness consisting of debt securities of such Person
   pursuant to a registered offering or private placement, but
   excluding the issuance or sale of (i) any Indebtedness permitted
   to be incurred pursuant to Section 6.11, including, without
   limitation, the Subordinated Indebtedness, (ii) Equity Interests
   by the Borrower to any officer, director or employee of the
   Borrower or any of its Subsidiaries pursuant to any incentive
   compensation plan or program and (iii) Equity Interests or
   Indebtedness by any Subsidiary of the Borrower to the Borrower or
   any Wholly-Owned Subsidiary of the Borrower.

            "Floating Rate" means, for any day, a rate per annum equal
   to (i) the Alternate Base Rate for such day plus (ii) the
   Applicable Margin, in each case changing when and as the
   Alternate Base Rate or Applicable Margin, as applicable, changes.

            "Floating Rate Advance" means an Advance which, except as
   otherwise provided in Section 2.11, bears interest at the
   Floating Rate.

            "Floating Rate Loan" means a Loan which, except as otherwise
   provided in Section 2.11, bears interest at the Floating Rate.

            "Foreign Subsidiary" means any Subsidiary that is not a
   Domestic Subsidiary.

                                     11
   <PAGE>

            "Genetic Systems" means Genetic Systems Corporation, a
   Delaware corporation.

            "Governmental Authority" means any nation or government, any
   federal, state, local or other political subdivision thereof and
   any entity exercising executive, legislative, judicial,
   regulatory or administrative functions of or pertaining to
   government.

            "Guarantor" means each Subsidiary that executes a Guaranty
   pursuant to the terms of Section 6.28, and its successors and
   assigns.

            "Guaranty" means an unconditional guaranty of payment of the
   Secured Obligations, in form and substance satisfactory to the
   Agent, executed by any Subsidiary pursuant to the terms of
   Section 6.28, in each case as the same may from time to time be
   amended, modified, supplemented and/or restated.

            "Holders of Secured Obligations" shall mean the holders of
   the Secured Obligations from time to time and shall include their
   respective successors, transferees and assigns.

            "Indebtedness" of a Person means, without duplication, such
   Person's (i) obligations for borrowed money, (ii) obligations
   representing the deferred purchase price of Property or services
   (other than accounts payable arising in the ordinary course of
   such Person's business payable on terms customary in the trade),
   (iii) obligations which are evidenced by notes, acceptances, or
   other instruments, (iv) obligations of such Person to purchase
   securities or other Property arising out of or in connection with
   the sale of the same or substantially similar securities or
   Property, (v) Capitalized Lease Obligations, (vi) reimbursement
   obligations with respect to standby letters of credit, whether
   drawn or undrawn, (vii) Rate Management Obligations, (viii) Off-
   Balance Sheet Liabilities, (ix) all liabilities and obligations
   of the type described in the preceding clauses (i) through (viii)
   of any other Person that such Person has assumed or guaranteed or
   that are secured by a Lien on any Property of such Person
   (provided that if any such liability or obligation of such other
   Person is not the legal liability of such Person, the amount
   thereof shall be deemed to be the lesser of (1) the actual amount
   of such liability or obligation and (2) the book value of such
   Person's Property securing such liability or obligation), and (x)
   any other obligation for borrowed money or other financial
   accommodation which in accordance with Agreement Accounting
   Principles would be shown as a liability on the consolidated
   balance sheet of such Person.

            "Interest Period" means, with respect to a Eurocurrency
   Advance, a period of one, two, three or six months (or, if then
   available to all Lenders, nine or twelve months) commencing on a
   Business Day selected by the Borrower pursuant to this Agreement.
   Such Interest Period shall end on the day which corresponds
   numerically to such date the applicable number of months
   thereafter, provided, however, that if there is no such
   numerically corresponding day in such succeeding month, such
   Interest Period shall end on the last Business Day of such
   succeeding month.  If an Interest Period would otherwise end on a
   day which is not a Business Day, such Interest Period shall end
   on the next succeeding Business Day, provided, however, that if
   said next succeeding Business Day falls in a new calendar month,
   such Interest Period shall end on the immediately preceding
   Business Day.

                                     12
   <PAGE>

            "Investment" of a Person means any loan, advance (other than
   commission, travel and similar advances to officers and employees
   made in the ordinary course of business), extension of credit
   (other than accounts or notes receivable arising in the ordinary
   course of business on terms customary in the trade) or
   contribution of capital by such Person; stocks, bonds, mutual
   funds, partnership interests, notes, debentures or other
   securities (other than treasury stock) owned by such Person; any
   deposit accounts and certificate of deposit owned by such Person;
   and structured notes, derivative financial instruments and other
   similar instruments or contracts owned by  such Person.  Payment
   by a Person under a guaranty by such Person of Indebtedness of
   another Person shall be deemed to be an Investment by such Person
   in such other Person in the amount of such payment.

            "Issuing Lender" means Bank One and any other Lender that
   agrees, in its sole discretion, to issue Letters of Credit
   hereunder, and with respect to the Existing Letters of Credit
   only, "Issuing Lender" means Bank One, ABN AMRO Bank N.V. or
   Union Bank of California, as applicable.

            "L/C Draft" means a draft drawn on the Issuing Lender
   pursuant to a Letter of Credit.

            "L/C Interest" shall have the meaning ascribed to such term
   in Section 2.4.2.

            "L/C Obligations" means, without duplication, an amount
   equal to the sum of (i) the aggregate of the amount then
   available for drawing under each of the Letters of Credit, (ii)
   the face amount of all outstanding L/C Drafts corresponding to
   the Letters of Credit, which L/C Drafts have been accepted by the
   Issuing Lender, (iii) the aggregate outstanding amount of all
   Reimbursement Obligations at such time and (iv) the aggregate
   face amount of all Letters of Credit requested by the Borrower
   but not yet issued (unless the request for an unissued Letter of
   Credit has been denied).

            "Lenders" means the lending institutions listed on the
   signature pages of this Agreement and their respective successors
   and assigns.

            "Lending Installation" means, with respect to a Lender or
   the Agent, the office, branch, subsidiary or affiliate of such
   Lender or the Agent listed on the administrative information
   sheets provided to the Agent in connection herewith or otherwise
   selected by such Lender or the Agent pursuant to Section 2.17.

            "Letter of Credit" means any letter of credit issued or to
   be issued by the Issuing Lender pursuant to Section 2.4.1 and any
   Existing Letter of Credit.

            "Leverage Ratio" means, as of any date of calculation, the
   ratio of (i) Consolidated Funded Indebtedness outstanding on such
   date to (ii) Consolidated EBITDA for the Borrower's then most-
   recently ended four fiscal quarters.

            "Lien" means any lien (statutory or other), mortgage,
   pledge, hypothecation, assignment, deposit arrangement,
   encumbrance or preference, priority or other security agreement
   or preferential arrangement of any kind or nature whatsoever

                                     13
   <PAGE>

   (including, without limitation, the interest of a vendor or
   lessor under any conditional sale, Capitalized Lease or other
   title retention agreement).

            "Loan" means a Revolving Loan or a Term Loan.

            "Loan Documents" means this Agreement, any Notes issued
   pursuant to Section 2.13, any Guaranty, the Collateral Documents
   and the other documents and agreements contemplated hereby and
   executed by the Borrower in favor of the Agent or any Lender.

            "Loan Parties" means the Borrower and each Guarantor.

            "Material Adverse Effect" means a material adverse effect on
   (i) the business, Property, condition (financial or otherwise) or
   results of operations of the Borrower and its Subsidiaries taken
   as a whole, (ii) the ability of the Borrower and the Guarantors
   collectively to perform their obligations under the Loan
   Documents, or (iii) the validity or enforceability of any of the
   Loan Documents or the rights or remedies of the Agent or the
   Lenders thereunder.

            "Material Domestic Subsidiary" means any Domestic Subsidiary
   (other than a Guarantor) having assets (other than non-U.S.
   domiciled assets and Equity Interests in Foreign Subsidiaries)
   with a book value of $10,000,000 or more or any group of Domestic
   Subsidiaries (other than Guarantors) on a combined basis having
   such assets with a book value of $15,000,000 or more.

            "Material Indebtedness" is defined in Section 7.5.

            "Material Subsidiary" means any Subsidiary, or group of
   Subsidiaries on a combined basis, that constitutes a Substantial
   Portion of the Property of the Borrower and its Subsidiaries.

            "Moody's" mean Moody's Investors Service, Inc.

            "Multiemployer Plan" means a Plan which is a multiemployer
   plan as defined in Section 4001(a)(3) of ERISA and to which the
   Borrower or any member of the Controlled Group is obligated to
   make contributions.

            "Net Cash Proceeds" means, with respect to any Asset Sale or
   Financing by any Person,  (a) cash received by such Person or any
   Subsidiary of such Person from such Asset Sale (including cash
   received as consideration for the assumption or incurrence of
   liabilities incurred in connection with or in anticipation of
   such Asset Sale) or Financing, after (i) provision for all income
   or other taxes measured by or resulting from such Asset Sale or
   Financing, (ii) payment of all brokerage commissions and other
   fees and expenses related to such Asset Sale or Financing, (iii)
   repayment of Indebtedness secured by a Lien on any asset disposed
   of in such Asset Sale, (iv) deduction of appropriate amounts to
   be provided by such Person or a Subsidiary of such Person as a
   reserve, in accordance with Agreement Accounting Principles,
   against any liabilities associated with the assets sold or
   disposed of in such Asset Sale and retained by such Person or a
   Subsidiary of such Person after such Asset Sale, including,
   without limitation, liabilities related to environmental matters,

                                     14
   <PAGE>

   or against any indemnification obligations associated with the
   assets sold or disposed of in such Asset Sale, and (v) in the
   case of a sale of a facility, the costs of relocating the
   operations of the Borrower and its Subsidiaries from that
   facility; and (b) cash payments in respect of any Indebtedness,
   Equity Interest or other consideration received by such Person or
   any Subsidiary of such Person from such Asset Sale upon receipt
   of such cash payments by such Person or such Subsidiary.

            "Non-U.S. Lender" is defined in Section 3.5(iv).

            "Note" means any promissory note issued at the request of a
   Lender pursuant to Section 2.13 in the form of Exhibit C-1 or C-
   2.

            "Obligations" means all unpaid principal of and accrued and
   unpaid interest on the Loans, all unpaid Reimbursement
   Obligations, all accrued and unpaid fees and all expenses,
   reimbursements, indemnities and other obligations of the Borrower
   to the Lenders or to any Lender, the Issuing Lender, the Agent or
   any indemnified party arising under the Loan Documents.

            "Off-Balance Sheet Liability" of a Person means (i) any
   repurchase obligation or recourse liability of such Person with
   respect to the collectibility of accounts or notes receivable
   sold by such Person, (ii) any liability under any Sale and
   Leaseback Transaction which is not a Capitalized Lease, (iii) any
   liability under any so-called "synthetic lease" transaction
   entered into by such Person, or (iv) any obligation arising with
   respect to any other transaction which is the functional
   equivalent of borrowing but which does not constitute a liability
   on the balance sheet of such Person, but excluding from this
   clause (iv) any lease of Property (other than a Capitalized
   Lease) by such Person as lessee which has an original term
   (including any required renewals and any renewals effective at
   the option of the lessor) of one year or more.

            "Other Taxes" is defined in Section 3.5(ii).

            "Participants" is defined in Section 12.2.1.

            "Payment Date" means the last day of each March, June,
   September and December.

            "PBGC" means the Pension Benefit Guaranty Corporation, or
   any successor thereto.

            "Permitted Acquisition" means any Acquisition made by the
   Borrower or any of its Subsidiaries, provided that (i) as of the
   date of the consummation of such Acquisition, no Default or
   Unmatured Default shall have occurred and be continuing or would
   result from such Acquisition, and the representation and warranty
   contained in Section 5.11 shall be true both before and after
   giving effect to such Acquisition, (ii) such Acquisition is
   consummated on a non-hostile basis pursuant to a negotiated
   acquisition agreement approved by the board of directors or other
   applicable governing body of the seller or entity to be acquired,
   and no material challenge to such Acquisition (excluding the
   exercise of appraisal rights) shall be pending or threatened by
   any shareholder or director of the seller or entity to be
   acquired, (iii) the business to be acquired in such Acquisition

                                     15
   <PAGE>

   is reasonably related to one or more of the fields of enterprise
   in which the Borrower and its Subsidiaries are engaged on the
   Closing Date (after giving effect to the PSD Acquisition), and
   (iv) as of the date of the consummation of such Acquisition, all
   material approvals required in connection therewith shall have
   been obtained.

            "Permitted Subordinated Indebtedness" means Indebtedness of
   the Borrower, the payment of which is subordinated to payment of
   the Secured Obligations and all of the terms and conditions of
   which are reasonably acceptable to the Agent and the Required
   Lenders, issued in an aggregate principal amount not to exceed
   $125,000,000, the proceeds of which are used, in whole or in
   part, to consummate the PSD Acquisition or to refinance the
   Bridge Loan in its entirety; provided that terms and conditions
   substantially similar to those contained in the Description of
   Notes shall be deemed to be reasonably acceptable.

            "Person" means any natural person, corporation, firm, joint
   venture, partnership, limited liability company, association,
   enterprise, trust or other entity or organization, or any
   government or political subdivision or any agency, department or
   instrumentality thereof.

            "Plan" means an employee pension benefit plan which is
   covered by Title IV of ERISA or subject to the minimum funding
   standards under Section 412 of the Code as to which the Borrower
   or any member of the Controlled Group could reasonably be
   expected to incur any liability.

            "Pricing Schedule" means the Schedule attached hereto
   identified as such.

            "Pro Rata Share" means, with respect to any Lender at any
   time, the fraction (expressed as a percentage) obtained by
   dividing (a) such Lender's Commitment at such time by (b) the
   Aggregate Commitment at such time; provided, however, that if the
   Commitments shall have been terminated at such time, then "Pro
   Rata Share" shall mean the fraction (expressed as a percentage)
   obtained by dividing (x) the aggregate principal amount of such
   Lender's Revolving Loans, participations in L/C Obligations and
   Term Loans outstanding at such time by (y) the aggregate
   principal amount of all of the Revolving Loans, L/C Obligations
   and Term Loans outstanding at such time.

            "Property" of a Person means any and all property, whether
   real, personal, tangible, intangible, or mixed, of such Person,
   or other assets owned, leased or operated by such Person,
   including, without limitation, Equity Interests of Subsidiaries
   of such Person.

            "PSD Acquisition" means the acquisition by the Borrower of
   the outstanding capital stock of Pasteur Sanofi Diagnostics S.A.
   and certain related assets (the "Acquired Business") pursuant to
   the PSD Purchase Agreement.

            "PSD Purchase Agreement" means the Purchase Agreement dated
   July 3, 1999 among the Borrower, Sanofi Synthelabo and Institut
   Pasteur.

            "Purchasers" is defined in Section 12.3.1.

                                     16
   <PAGE>

            "Rate Management Transaction" means any transaction
   (including an agreement with respect thereto) now existing or
   hereafter entered into which is a rate swap, basis swap, forward
   rate transaction, commodity swap, commodity option, equity or
   equity index swap, equity or equity index option, bond option,
   interest rate option, foreign exchange transaction, cap
   transaction, floor transaction, collar transaction, forward
   transaction, currency swap transaction, cross-currency rate swap
   transaction, currency option or any other similar transaction
   (including any option with respect to any of these transactions)
   or any combination thereof, whether linked to one or more
   interest rates, foreign currencies, commodity prices, equity
   prices or other financial measures.

            "Rate Management Obligations" of a Person means any and all
   obligations of such Person, whether absolute or contingent and
   howsoever and whensoever created, arising, evidenced or acquired
   (including all renewals, extensions and modifications thereof and
   substitutions therefor), under (i) any and all Rate Management
   Transactions, and (ii) any and all cancellations, buy backs,
   reversals, terminations or assignments of any Rate Management
   Transactions.

            "Regulation D" means Regulation D of the Board of Governors
   of the Federal Reserve System as from time to time in effect and
   any successor thereto or other regulation or official
   interpretation of said Board of Governors relating to reserve
   requirements applicable to member banks of the Federal Reserve
   System.

            "Regulation U" means Regulation U of the Board of Governors
   of the Federal Reserve System as from time to time in effect and
   any successor or other regulation or official interpretation of
   said Board of Governors relating to the extension of credit by
   banks for the purpose of purchasing or carrying margin stocks
   applicable to member banks of the Federal Reserve System.

            "Reimbursement Obligation" is defined in Section 2.4.3.

            "Reportable Event" means a reportable event as defined in
   Section 4043 of ERISA and the regulations issued under such
   section, with respect to a Plan, excluding, however, such events
   as to which the PBGC has by regulation waived the requirement of
   Section 4043(a) of ERISA that it be notified within 30 days of
   the occurrence of such event, provided, however, that a failure
   to meet the minimum funding standard of Section 412 of the Code
   and of Section 302 of ERISA shall be a Reportable Event
   regardless of the issuance of any such waiver of the notice
   requirement in accordance with either Section 4043(a) of ERISA or
   Section 412(d) of the Code.

            "Required Lenders" means Lenders in the aggregate having
   more than 50% of the sum of the Aggregate Commitment and the
   aggregate unpaid principal amount of the Term Loans or, if the
   Aggregate Commitment has been terminated, Lenders in the
   aggregate holding more than 50% of the aggregate unpaid principal
   amount of the outstanding Advances and L/C Obligations.

            "Reserve Requirement" means, with respect to an Interest
   Period, the maximum aggregate reserve requirement (including all
   basic, supplemental, marginal and other reserves), if any, which
   is imposed under Regulation D on Eurocurrency liabilities.

                                     17
   <PAGE>

            "Revolving Advance" means an Advance consisting of Revolving
   Loans.
            "Revolving Loan" means, with respect to any Lender, a loan
   made by such Lender pursuant to Section 2.1.2 (or any conversion
   or continuation thereof).

            "S&P" means Standard and Poor's Ratings Services, a division
   of The McGraw Hill Companies, Inc.

            "Sale and Leaseback Transaction" means any sale or other
   transfer of Property by any Person with the intent to lease such
   Property as lessee.

            "Schedule" refers to a specific schedule to this Agreement,
   unless another document is specifically referenced.

            "Schwartz Group" means David and Alice Schwartz, their
   family and heirs, and corporations, partnerships and limited
   liability companies 100% owned by any of the foregoing and trusts
   for the benefit of any of the foregoing.

            "Section" means a numbered section of this Agreement, unless
   another document is specifically referenced.

            "Secured Obligations" means, collectively, (i) the
   Obligations and (ii) all Rate Management Obligations owing to any
   Lender or any affiliate of any Lender.

            "Single Employer Plan" means a Plan (other than a
   Multiemployer Plan) maintained by the Borrower or any member of
   the Controlled Group for employees of the Borrower or any member
   of the Controlled Group.

            "Subordinated Indebtedness" means the Bridge Loan and the
   Permitted Subordinated Indebtedness.

            "Subsidiary" of a Person means (i) any corporation more than
   50% of the outstanding securities having ordinary voting power of
   which shall at the time be owned or controlled, directly or
   indirectly, by such Person or by one or more of its Subsidiaries
   or by such Person and one or more of its Subsidiaries, or (ii)
   any partnership, limited liability company, association, joint
   venture or similar business organization more than 50% of the
   ownership interests having ordinary voting power of which shall
   at the time be so owned or controlled.  Unless otherwise
   expressly provided, all references herein to a "Subsidiary" shall
   mean a Subsidiary of the Borrower.

            "Substantial Portion" means, with respect to the Property of
   the Borrower and its Subsidiaries, Property which (i) represents
   more than 10% of the consolidated assets of the Borrower and its
   Subsidiaries as shown in the consolidated financial statements of
   the Borrower and its Subsidiaries as at the end of the four
   fiscal quarter period ending immediately prior to the fiscal

                                     18
   <PAGE>

   quarter in which such determination is made, or (ii) is
   responsible for more than 10% of the consolidated net income of
   the Borrower and its Subsidiaries as reflected in the financial
   statements referred to in clause (i) above.

            "Synthetic Lease" is defined in Section 6.11(viii).

            "Taxes" means any and all present or future taxes, duties,
   levies, imposts, deductions, charges or withholdings, and any and
   all liabilities with respect to the foregoing, but excluding
   Excluded Taxes.

            "Term Loan" means, with respect to any Lender, the loan made
   by such Lender pursuant to Section 2.1.1 (or any conversion or
   continuation thereof).

            "Transferee" is defined in Section 12.4.

            "Type" means, with respect to any Advance, its nature as a
   Floating Rate Advance or a Eurocurrency Advance.

            "Unfunded Liabilities" means the amount (if any) by which
   the present value of all vested and unvested accrued benefits
   under all Single Employer Plans exceeds the fair market value of
   all such Plan assets allocable to such benefits, all determined
   as of the then most recent valuation date for such Plans using
   PBGC actuarial assumptions for single employer plan terminations.

            "Unmatured Default" means an event which but for the lapse
   of time or the giving of notice, or both, would constitute a
   Default.

            "Voting Equity Interests" means Equity Interests which at
   the time are entitled to vote in the election of, as applicable,
   directors, members or partners generally.

            "Wholly-Owned Subsidiary" of a Person means (i) any
   Subsidiary all of the outstanding voting securities of which
   shall at the time be owned or controlled, directly or indirectly,
   by such Person or one or more Wholly-Owned Subsidiaries of such
   Person, or by such Person and one or more Wholly-Owned
   Subsidiaries of such Person, or (ii) any partnership, limited
   liability company, association, joint venture or similar business
   organization 100% of the ownership interests having ordinary
   voting power of which shall at the time be so owned or
   controlled.

            "Working Capital" means, as at any date of determination,
   the excess, if any, of (i) the Borrower's consolidated current
   assets, except cash and Cash Equivalent Investments, over
   (ii) the Borrower's consolidated current liabilities, except
   current maturities of long-term debt and Revolving Loans as of
   such date and all accrued interest as of such date.

            "Year 2000 Issues" means anticipated costs, problems and
   uncertainties associated with the inability of certain computer
   applications (whether of the Borrower, any of its Subsidiaries,

                                     19
   <PAGE>

   or any of the Borrower's or any of its Subsidiaries' material
   customers, suppliers or vendors) to effectively handle data
   including dates on and after January 1, 2000, as such inability
   affects the business, operations and financial condition of the
   Borrower and its Subsidiaries.

            "Year 2000 Program" is defined in Section 5.19.

            The foregoing definitions shall be equally applicable to
   both the singular and plural forms of the defined terms.


                                ARTICLE II

                                THE CREDITS

         2.1.  The Loans.

            2.1.1.  Term Loans.  Each Lender severally agrees, on the
   terms and conditions set forth in this Agreement, to make a Term
   Loan in Dollars to the Borrower on the Closing Date in an amount equal
   to such Lender's Pro Rata Share of $100,000,000.

            2.1.2.  Revolving Loans.  (a) Commitment.  From and including
   the date of this Agreement and prior to the Facility Termination Date,
   each Lender severally agrees, on the terms and conditions set forth in
   this Agreement, to make Revolving Loans in Agreed Currencies to the
   Borrower from time to time in Dollar Amounts not to exceed in the
   aggregate at any one time outstanding the Dollar Amount of its
   Commitment minus its Pro Rata Share of the Dollar Amount of L/C
   Obligations outstanding at such time, provided that (i) all Floating
   Rate Loans shall be made in Dollars and (ii) upon giving effect to
   each Revolving Advance, the aggregate outstanding principal Dollar
   Amount of all Advances and L/C Obligations in Agreed Currencies other
   than Dollars shall not exceed $100,000,000.  Subject to the terms of
   this Agreement, the Borrower may borrow, repay and reborrow at any
   time prior to the Facility Termination Date.  The Commitments to lend
   hereunder shall expire on the Facility Termination Date.

           (b)Determination of Dollar Amounts; Required Payments.
   (i)  The Agent will determine the Dollar Amount of:

           (i) each Revolving Advance as of the date two Business Days
   prior to the Borrowing Date or, if applicable, date of
   conversion/continuation of such Revolving Advance, and

           (ii) all outstanding Revolving Advances and L/C Obligations
   on and as of the last Business Day of each quarter and on any other
   Business Day elected by the Agent in its reasonable discretion or upon
   instruction by the Required Lenders.

                                     20
   <PAGE>

   Each day upon or as of which the Agent determines Dollar Amounts
   as described in the preceding clauses (i) and (ii) is herein
   described as a "Computation Date" with respect to Revolving
   Advances and L/C Obligations for which a Dollar Amount is
   determined on or as of such day.  If at any time the Dollar
   Amount of the sum of the aggregate principal amount of all
   outstanding Revolving Advances plus the Dollar Amount of
   outstanding L/C Obligations (calculated, with respect to those
   Revolving Advances and L/C Obligations denominated in Agreed
   Currencies other than Dollars, as of the most recent Computation
   Date with respect thereto) exceeds 105% of the Aggregate
   Commitment, the Borrower shall immediately repay Revolving
   Advances in an aggregate principal amount such that after giving
   effect thereto the Dollar Amount of the sum of the aggregate
   principal amount of all outstanding Revolving Advances plus the
   Dollar Amount of outstanding L/C Obligations (calculated, with
   respect to those Revolving Advances and L/C Obligations
   denominated in Agreed Currencies other than Dollars, as of the
   most recent Computation Date with respect thereto) does not
   exceed the Aggregate Commitment.

         2.2. Repayment.

            2.2.1.  Term Loans.  The Term Loans shall be repaid in
   seventeen (17) quarterly installments of principal payable on each
   Payment Date, commencing on September 30, 2000, in the aggregate
   principal amounts set forth below:

       Payment Date                        Installment Agreement

       September 30, 2000                       $ 5,000,000
       December 31, 2000                        $ 5,000,000

       March 31, 2001                           $ 3,750,000
       June 30, 2001                            $ 3,750,000
       September 30, 2001                       $ 3,750,000
       December 31, 2001                        $ 3,750,000

       March 31, 2002                           $ 5,000,000
       June 30, 2002                            $ 5,000,000
       September 30, 2002                       $ 5,000,000
       December 31, 2002                        $ 5,000,000

       March 31, 2003                           $ 6,250,000
       June 30, 2003                            $ 6,250,000
       September 30, 2003                       $ 6,250,000
       December 31, 2003                        $ 6,250,000

       March 31, 2004                           $10,000,000
       June 30, 2004                            $10,000,000
       September 30, 2004                       $10,000,000

                                     21
   <PAGE>

   provided, however, that (i) the final installment on September
   30, 2004 shall be in the amount of the then unpaid principal
   balance of  the Term Loans and (ii) the entire unpaid principal
   balance of the Term Loans shall be due and payable on the
   Facility Termination Date.  Once repaid, the Term Loans may not
   be reborrowed.

            2.2.2.  Revolving Loans.  All outstanding Revolving Loans
   and all other unpaid Obligations shall be paid in full by the Borrower on the
   Facility Termination Date.

         2.3.  Ratable Loans; Types of Advances.  Each Advance hereunder
   shall consist of Loans made from the several Lenders ratably in
   accordance with their respective Pro Rata Shares. The Advances
   may be Floating Rate Advances or Eurocurrency Advances, or a
   combination thereof, selected by the Borrower in accordance with
   Sections 2.8 and 2.9.  After giving effect to any Advance, unless
   the Agent shall consent, there shall not be more than ten (10)
   different Interest Periods in effect with respect to all Advances
   then outstanding.

         2.4.Letters of Credit.

            2.4.1.  Letter of Credit Facility.  Upon receipt of duly
   executed applications therefor, and such other documents,
   instructions and agreements as the Issuing Lender may reasonably
   require, and subject to the provisions of Section 2.1.2 and
   Article IV, the Issuing Lender shall issue Letters of Credit
   denominated in any Agreed Currency for the account of the
   Borrower (or for the account of the Borrower and any of its
   Subsidiaries, provided that the Borrower's obligations hereunder
   with respect thereto shall be several and not joint), on terms as
   are satisfactory to the Issuing Lender; provided, however, that
   no Letter of Credit will be issued for the account of the
   Borrower by the Issuing Lender if on the date of issuance, before
   or after taking such Letter of Credit into account, (i) the
   aggregate outstanding Dollar Amount of all of the Revolving
   Advances and L/C Obligations exceeds or would exceed the
   Aggregate Commitment, (ii) the aggregate outstanding Dollar
   Amount of all Advances and L/C Obligations in Agreed Currencies
   other than Dollars would exceed $100,000,000, or (iii) the
   aggregate outstanding Dollar Amount of the L/C Obligations
   exceeds or would exceed $10,000,000; and provided, further, that
   no Letter of Credit shall be issued which has an expiration date
   later than the earlier of (i) one year from the date of issuance
   thereof and (ii) the date which is five (5) Business Days
   immediately preceding the Facility Termination Date. Each Letter
   of Credit may, upon the request of the Borrower, include a
   provision whereby such Letter of Credit shall be renewed
   automatically for additional consecutive periods of 12 months or
   less (but not beyond the date that is five Business Days prior to
   the Facility Termination Date) unless the Issuing Lender notifies
   the beneficiary thereof at least 30 days prior to the then-
   applicable expiry date that such Letter of Credit will not be
   renewed.

            2.4.2.  Letter of Credit Participation.  Immediately upon
   the issuance of each Letter of Credit by the Issuing Lender hereunder,
   each Lender shall be deemed to have automatically, irrevocably and
   unconditionally purchased and received from the Issuing Lender an
   undivided interest and participation in and to such Letter of Credit,
   the obligations of the Borrower in respect thereof, and the liability
   of the Issuing Lender thereunder (collectively, an "L/C Interest")

                                     22
   <PAGE>

   in an amount equal to the amount available for drawing under such Letter
   of Credit multiplied by such Lender's Pro Rata Share.

            The Issuing Lender will notify the Agent promptly upon
   presentation to it of an L/C Draft or upon any other draw under a
   Letter of Credit, and the Agent will promptly notify each Lender.
   On or at any time after the Business Day on which the Issuing
   Lender makes payment of each such L/C Draft or any other draw on
   a Letter of Credit, on demand of the Issuing Lender received by
   each Lender not later than 1:00 p.m. (Chicago time) on such
   Business Day, each Lender shall make payment on such Business Day
   to the Agent for the account of the Issuing Lender, in
   immediately available funds in the Agreed Currency of such Letter
   of Credit, in an amount equal to such Lender's Pro Rata Share of
   the amount of the Borrower's unpaid Reimbursement Obligation with
   respect thereto.

            Upon the Agent's receipt of funds as a result of the
   Issuing Lender's payment on an L/C Draft or any other draw on a
   Letter of Credit issued by the Issuing Lender, the Agent shall
   promptly pay such funds to the Issuing Lender.  The obligation of
   each Lender to pay the Agent for the account of the Issuing
   Lender under this Section 2.4.2 shall be unconditional,
   continuing, irrevocable and absolute.  In the event that any
   Lender fails to make payment to the Agent of any amount due under
   this Section 2.4.2, the Agent shall be entitled to receive,
   retain and apply against such obligation the principal and
   interest otherwise payable to such Lender hereunder until the
   Agent on behalf of the Issuing Lender receives such payment from
   such Lender or such obligation is otherwise fully satisfied;
   provided, however, that nothing contained in this sentence shall
   relieve such Lender of its obligation to reimburse the Agent for
   such amount in accordance with this Section 2.4.2.

            2.4.3.  Reimbursement Obligation.  The Borrower agrees
   unconditionally, irrevocably and absolutely upon receipt of
   notice from the Agent or the Issuing Lender to pay to the Agent,
   for the account of the Issuing Lender or the account of the
   Lenders, as the case may be, the amount of each advance which may
   be drawn under or pursuant to a Letter of Credit issued for its
   account or an L/C Draft related thereto (such obligation of the
   Borrower to reimburse the Issuing Lender or the Agent for an
   advance made under a Letter of Credit or L/C Draft being
   hereinafter referred to as a "Reimbursement Obligation" with
   respect to such Letter of Credit or L/C Draft), each such payment
   to be made by the Borrower to the Agent no later than 2:00 p.m.
   (Chicago time) on the third Business Day after the Business Day
   on which the Issuing Lender makes payment of each such L/C Draft.
   The Issuing Lender may direct the Agent to make such demand with
   respect to Letters of Credit issued by the Issuing Lender.  If,
   for any reason, the Borrower fails to repay a Reimbursement
   Obligation on the day such Reimbursement Obligation arises, then
   such Reimbursement Obligation shall bear interest from and after
   such day, until paid in full, at the interest rate applicable to
   a Floating Rate Advance.  Such interest shall be for the account
   of the Issuing Lender until the Lenders make payment for their
   respective participation interests in such Reimbursement
   Obligation in accordance with Section 2.4.2.

            2.4.4.  Cash Collateral.  Notwithstanding anything to the
   contrary herein or in any application for a Letter of Credit, after the

                                     23
   <PAGE>

   occurrence and during the continuance of a Default, the Borrower
   shall, upon the Agent's demand (and, in the case of any Default
   described in Section 7.6 or 7.7, immediately, without any demand
   or the taking of any other action by the Agent, the Issuing Bank
   or any Lender), deliver to the Agent for the benefit of the
   Lenders, cash, or other collateral of a type satisfactory to the
   Required Lenders, having a value, as determined by such Required
   Lenders, equal to the aggregate outstanding L/C Obligations of
   the Borrower.  Any such collateral shall be held by the Agent in
   a separate account appropriately designated as a cash collateral
   account in relation to this Agreement and the Letters of Credit
   and retained by the Agent for the benefit of the Lenders as
   collateral security for the Borrower's obligations in respect of
   this Agreement and each of the Letters of Credit and L/C Drafts.
   Such amounts shall be applied to reimburse the Agent or the
   Issuing Lender, as applicable, for drawings or payments under or
   pursuant to Letters of Credit or L/C Drafts, or if no such
   reimbursement is required, to payment of such of the other
   Obligations as the Agent shall determine.  If no Default shall be
   continuing, amounts remaining in any cash collateral account
   established pursuant to this Section 2.4.4. which are not to be
   applied to reimburse the Issuing Lender for amounts actually paid
   or to be paid by the Issuing Lender in respect of a Letter of
   Credit or L/C Draft shall be returned to the Borrower (after
   deduction of the Agent's expenses incurred in connection with
   such cash collateral account).

            2.4.5.  Letter of Credit Fees.  The Borrower agrees to pay
   in Dollars (i) quarterly, in arrears, on each Payment Date to the Agent,
   for the ratable benefit of the Lenders, a letter of credit fee in the
   amount of the Applicable Fee Rate per annum on the aggregate average
   daily outstanding Dollar Amount available for drawing under all of the
   Letters of Credit and (ii) to the Agent for the benefit of the Issuing
   Lender, a fronting fee of  1/4 of one percent (0.25%) of the initial
   outstanding Dollar Amount available for drawing under each Letter of
   Credit (other than the Existing Letters of Credit), payable on the date
   of issuance of such Letter of Credit, plus all customary fees and other
   issuance, amendment, document examination, negotiation and presentment
   expenses and related charges in connection with the issuance, amendment,
   presentation of L/C Drafts, and the like customarily charged by the
   Issuing Lender with respect to standby and commercial Letters of Credit,
   including, without limitation, standard commissions with respect to
   commercial Letters of Credit, payable at the time of invoice of such
   amounts.

            2.4.6.  Indemnification; Exoneration.  (a)  In addition to
   amounts payable as elsewhere provided in this Agreement, the Borrower
   agrees to protect, indemnify, pay and save harmless the Agent, the
   Issuing Lender and each Lender from and against any and all liabilities
   and costs which the Agent, the Issuing Lender or any Lender may incur
   or be subject to as a consequence, direct or indirect, of (i) the
   issuance of any Letter of Credit other than, in the case of the
   Issuing Lender, as a result of its gross negligence or willful
   misconduct, as determined by the final judgment of a court of
   competent jurisdiction, or (ii) the failure of the Issuing Lender
   of a Letter of Credit to honor a drawing under such Letter of
   Credit as a result of any act or omission, whether rightful or
   wrongful, of any present or future de jure or de facto Governmental
   Authority (all such acts or omissions herein called "Governmental Acts").

            (b)  As among the Borrower, the Lenders, the Issuing
   Lender and the Agent, the Borrower assumes all risks of the acts

                                     24
   <PAGE>

   and omissions of, or misuse of such Letter of Credit by, the
   beneficiary of any Letter of Credit.  In furtherance and not in
   limitation of the foregoing, subject to the provisions of the
   Letter of Credit applications and Letter of Credit reimbursement
   agreements executed by the Borrower at the time of request for
   any Letter of Credit, the Issuing Lender of a Letter of Credit,
   the Agent and the Lenders shall not be responsible (in the
   absence of gross negligence or willful misconduct in connection
   therewith, as determined by the final judgment of a court of
   competent jurisdiction):  (i) for the form, validity,
   sufficiency, accuracy, genuineness or legal effect of any
   document submitted by any party in connection with the
   application for and issuance of the Letters of Credit, even if it
   should in fact prove to be in any or all respects invalid,
   insufficient, inaccurate, fraudulent or forged; (ii) for the
   validity or sufficiency of any instrument transferring or
   assigning or purporting to transfer or assign a Letter of Credit
   or the rights or benefits thereunder or proceeds thereof, in
   whole or in part, which may prove to be invalid or ineffective
   for any reason; (iii) for failure of the beneficiary of a Letter
   of Credit to comply duly with conditions required in order to
   draw upon such Letter of Credit; (iv) for errors, omissions,
   interruptions or delays in transmission or delivery of any
   messages, by mail, cable, telegraph, telex, or other similar form
   of teletransmission or otherwise; (v) for errors in
   interpretation of technical trade terms; (vi) for any loss or
   delay in the transmission or otherwise of any document required
   in order to make a drawing under any Letter of Credit or of the
   proceeds thereof; (vii) for the misapplication by the beneficiary
   of a Letter of Credit of the proceeds of any drawing under such
   Letter of Credit; and (viii) for any consequences arising from
   causes beyond the control of the Agent, the Issuing Lender and
   the Lenders, including, without limitation, any Governmental
   Acts.  None of the above shall affect, impair, or prevent the
   vesting of any of the Issuing Lender's rights or powers under
   this Section 2.4.6.

            (c)  In furtherance and extension and not in limitation
   of the specific provisions hereinabove set forth, any action
   taken or omitted by the Issuing Lender under or in connection
   with Letters of Credit issued on behalf of the Borrower or any
   related certificates shall not, in the absence of gross
   negligence or willful misconduct, as determined by the final
   judgment of a court of competent jurisdiction, put the Issuing
   Lender, the Agent or any Lender under any resulting liability to
   the Borrower or relieve the Borrower of any of its obligations
   hereunder to any such Person.

            (d)  Without prejudice to the survival of any other
   agreement of the Borrower hereunder, the agreements and
   obligations of the Borrower contained in this Section 2.4.6.
   shall survive the payment in full of principal and interest
   hereunder, the termination of the Letters of Credit and the
   termination of this Agreement.

            2.4.7.  Transitional Letter of Credit Provisions.  From
   and after the Closing Date, the letters of credit described on
   Schedule 2.4 (the "Existing Letters of Credit") shall be deemed
   to constitute Letters of Credit issued pursuant to Section 2.4.1.
   in which the Lenders participate pursuant to Section 2.4.2. Fees
   shall accrue in respect of the Existing Letters of Credit as
   provided in Section 2.4.5. beginning as of the Closing Date.

         2.5.  Commitment Fee; Reductions in Aggregate Commitment.
   The Borrower agrees to pay to the Agent for the account of
   each Lender a commitment fee at a per annum rate equal to the

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   <PAGE>

   Applicable Fee Rate on the daily unused portion of such Lender's
   Commitment from the date hereof to and including the Facility
   Termination Date, payable on each Payment Date hereafter and on
   the Facility Termination Date.  The Borrower may permanently
   reduce the Aggregate Commitment in whole, or in part ratably
   among the Lenders in the minimum amount of $5,000,000 (and in
   integral multiples of $1,000,000 in excess thereof), upon at
   least three Business Days' written notice to the Agent, which
   notice shall specify the amount of any such reduction, provided,
   however, that the amount of the Aggregate Commitment may not be
   reduced below the aggregate principal Dollar Amount of the
   outstanding Revolving Loans and L/C Obligations.  All accrued
   commitment fees shall be payable on the effective date of any
   termination of the obligations of the Lenders to make Revolving
   Loans hereunder.

         2.6.  Minimum Amount of Each Advance.  Each Eurocurrency
   Advance in Dollars shall be in the minimum amount of $5,000,000 (and
   in multiples of $1,000,000 if in excess thereof), each Eurocurrency
   Advance in Euro shall be in the minimum amount of EUR 5,000,000
   (and in multiples of EUR 1,000,000 if in excess thereof), and
   each Floating Rate Advance shall be in the minimum amount of
   $250,000 (and in multiples of $250,000 if in excess thereof),
   provided, however, that any Floating Rate Advance may be in the
   amount of the unused Aggregate Commitment.

         2.7.  Prepayments.

            2.7.1.  Optional Principal Payments.  The Borrower may from
   time to time pay, without penalty or premium, all outstanding Floating
   Rate Advances, or, in a minimum aggregate amount of $250,000 or any
   integral multiple of $250,000 in excess thereof, any portion of the
   outstanding Floating Rate Advances upon notice to the Agent not later
   than 12:00 noon (Chicago time) on the date of payment (which shall be
   a Business Day).  The Borrower may from time to time pay, subject to the
   payment of any funding indemnification amounts required by Section
   3.4 but without penalty or premium, all outstanding Eurocurrency
   Advances, or, in a minimum aggregate amount of $5,000,000 or any integral
   multiple of $1,000,000 in excess thereof, any portion of the
   outstanding Eurocurrency Advances in Dollars upon three Business Days'
   prior notice to the Agent, and in a minimum aggregate amount of
   EUR 5,000,000 or any integral multiple of EUR 1,000,000 in excess
   hereof, any portion of the outstanding Eurocurrency Advances in Euro
   upon four Business Days' prior notice to the Agent.  Principal payments
   applied to the Term Loans shall be applied to the principal installments
   payable under Section 2.2.1 in the order specified by the Borrower, so
   long as no Default or Unmatured Default exists, and otherwise pro
   rata to all remaining unpaid principal installments.

            2.7.2.  Mandatory Prepayments of the Term Loans.

            (a)  In the event of any Asset Sale by the Borrower or
   any Subsidiary of the Borrower, other than those Asset Sales
   permitted pursuant to Section 6.13(i) through (iv) and except as
   provided in the following sentence, upon the Borrower's or any of
   its Subsidiaries' (i) receipt of any Net Cash Proceeds from any
   such Asset Sale, or (ii) conversion to cash or Cash Equivalent
   Investments of non-cash proceeds received from any Asset Sale,

                                     26
   <PAGE>

   which when aggregated with the Net Cash Proceeds from other Asset
   Sales consummated during the Borrower's then current fiscal year
   and other cash and Cash Equivalent Investments converted during
   such fiscal year from non-cash proceeds from any other Asset
   Sales exceed $5,000,000, the Borrower shall make a mandatory
   prepayment of the Term Loans in an amount equal to one hundred
   percent (100%) of such Net Cash Proceeds or such proceeds
   converted from non-cash to cash or Cash Equivalent Investments.
   Notwithstanding the foregoing, so long as no Default or Unmatured
   Default exists, such percentage shall be reduced to the
   Applicable Percentage, provided that the amount that would
   otherwise be required as a mandatory prepayment in accordance
   with the first sentence of this Section 2.7.2(a) (the "Available
   Net Cash Proceeds") shall be invested in assets or property
   (other than Cash Equivalent Investments) in the Borrower's or any
   Subsidiary's business within twelve months after such Asset Sale;
   such investment shall be deemed effected to the extent that such
   property or assets are acquired or constructed, commitments for
   such acquisition or construction are entered into and/or such
   property or assets are identified and a construction project
   related thereto has been commenced within such twelve-month
   period.  To the extent that Available Net Cash Proceeds are not
   so invested within twelve months after the applicable Asset Sale,
   such uninvested amount shall thereupon be paid to the Agent as a
   mandatory prepayment in accordance with this Section 2.7.2(a).
   So long as no Default or Unmatured Default exists, Net Cash
   Proceeds of  Asset Sales with respect to which the Borrower shall
   have given the Agent written notice prior to such Asset Sale of
   its intention to replace the assets within twelve months
   following such Asset Sale shall not be subject to the provisions
   of the first and second sentences of this Section 2.7.2(a) unless
   and to the extent that such applicable period shall have expired
   without such replacement having been made.

            (b)  In the event of any Financing by the Borrower or
   any Subsidiary of the Borrower, upon the Borrower's or any of its
   Subsidiaries' receipt of any Net Cash Proceeds from such
   Financing, the Borrower shall make a mandatory prepayment of the
   Term Loans in an amount equal to one hundred percent (100%) of
   such Net Cash Proceeds.

            (c)  Simultaneously with the delivery of the annual
   audited financial statements required to be delivered pursuant to
   Section 6.1(i) for each fiscal year, the Borrower shall calculate
   Excess Cash Flow for such fiscal year and shall make a mandatory
   prepayment of the Term Loans, payable not later than the earlier
   of ten (10) days after such financial statements and calculation
   are delivered or one hundred ten (110) days after the end of such
   fiscal year, in an amount equal to the Applicable Percentage of
   such Excess Cash Flow.

            (d)  Each mandatory prepayment required by clauses (a),
   (b) and (c) of this Section 2.7.2 shall be applied to the
   principal installments payable under Section 2.2.1 in the order
   of maturity to the extent of one quarterly installment and then
   pro rata to all remaining unpaid principal installments.

            (e)  Nothing in this Section 2.7.2 shall be construed
   to constitute the Lenders' consent to any transaction referred to
   in clauses (a) and (b) above which is otherwise prohibited by the
   terms of this Agreement.

                                     27
   <PAGE>

         2.8.  Method of Selecting Types and Interest Periods for New
   Advances.  The Borrower shall select the Type of Advance and, in
   the case of each Eurocurrency Advance, the Interest Period and Agreed
   Currency applicable thereto from time to time.  The Borrower shall give
   the Agent irrevocable notice (a "Borrowing Notice") not later than
   12:00 noon (Chicago time) on the Borrowing Date of each Floating
   Rate Advance, at least three Business Days before the Borrowing Date
   for each Eurocurrency Advance in Dollars and at least four Business Days
   before the Borrowing Date for each Eurocurrency Advance in Euro,
   specifying:

            (i)   the Borrowing Date, which shall be a Business Day, of
                  such Advance,

            (ii)  the aggregate amount of such Advance,

            (iii) the Type of Advance selected, and

            (iv)  in the case of each Eurocurrency Advance, the Interest
                  Period and Agreed Currency applicable thereto.

   On each Borrowing Date, each Lender shall make available its Loan
   or Loans, (i) if such Loan is denominated in Dollars, not later
   than 2:00 p.m., Chicago time, in Federal or other funds
   immediately available to the Agent, in Chicago, Illinois at its
   address specified in or pursuant to Article XIII and, (ii) if
   such Loan is denominated in an Agreed Currency other than
   Dollars, not later than 2:00 p.m., local time, in the city of the
   Agent's Eurocurrency Payment Office for such currency, in such
   funds as may then be customary for the settlement of
   international transactions in such currency in the city of and at
   the address of the Agent's Eurocurrency Payment Office for such
   currency.  Unless the Agent determines that any applicable
   condition specified in Article IV has not been satisfied, the
   Agent will make the funds so received from the Lenders available
   to the Borrower at the Agent's aforesaid address.

         2.9.  Conversion and Continuation of Outstanding Advances.
   Floating Rate Advances shall continue as Floating Rate
   Advances unless and until such Floating Rate Advances are
   converted into Eurocurrency Advances pursuant to this Section 2.9
   or are repaid in accordance with Section 2.7.  Each Eurocurrency
   Advance shall continue as a Eurocurrency Advance until the end of
   the then applicable Interest Period therefor, at which time:

            (i)  each such Eurocurrency Advance denominated in Dollars
                 shall be automatically converted into a Floating Rate
                 Advance unless (x) such Eurocurrency Advance is or was
                 repaid in accordance with Section 2.7 or (y) the
                 Borrower shall have given the Agent a
                 Conversion/Continuation Notice (as defined below)
                 requesting that, at the end of such Interest Period,
                 such Eurocurrency Advance either continue as a
                 Eurocurrency Advance for the same or another Interest
                 Period or be converted into a Floating Rate Advance;
                 and

            (ii) each such Eurocurrency Advance denominated in an Agreed

                                     28
   <PAGE>

                 Currency other than Dollars shall automatically
                 continue as a Eurocurrency Advance in the same Agreed
                 Currency with an Interest Period of one month unless
                 (x) such Eurocurrency Advance is or was repaid in
                 accordance with Section 2.7 or (y) the Borrower shall
                 have given the Agent a Conversion/Continuation Notice
                 (as defined below) requesting that, at the end of such
                 Interest Period, such Eurocurrency Advance continue as
                 a Eurocurrency Advance for the same or another Interest
                 Period.

   Subject to the terms of Section 2.6, the Borrower may elect from
   time to time to convert all or any part of an Advance of any Type
   into any other Type or Types of Advances denominated in the same
   Agreed Currency; provided that any conversion of any Eurocurrency
   Advance shall be made on, and only on, the last day of the
   Interest Period applicable thereto.  The Borrower shall give the
   Agent irrevocable notice (a "Conversion/Continuation Notice") of
   each conversion of an Advance or continuation of a Eurocurrency
   Advance not later than 12:00 noon (Chicago time) at least one
   Business Day, in the case of a conversion into a Floating Rate
   Advance, three Business Days, in the case of a conversion into or
   continuation of a Eurocurrency Advance denominated in Dollars, or
   four Business Days, in the case of a conversion into or
   continuation of a Eurocurrency Advance denominated in an Agreed
   Currency other than Dollars, prior to the date of the requested
   conversion or continuation, specifying:

            (i)  the requested date, which shall be a Business Day, of
                 such conversion or continuation, and

            (ii) the Agreed Currency, amount and Type(s) of Advance(s)
                 into which such Advance is to be converted or continued
                 and, in the case of a conversion into or continuation
                 of a Eurocurrency Advance, the duration of the Interest
                 Period applicable thereto.

         2.10.  Changes in Interest Rate, etc.  Each Floating Rate
   Advance shall bear interest on the outstanding principal amount
   thereof, for each day from and including the date such Advance is
   made or is automatically converted from a Eurocurrency Advance
   into a Floating Rate Advance pursuant to Section 2.9, to but
   excluding the date it is paid or is converted into a Eurocurrency
   Advance pursuant to Section 2.9 hereof, at a rate per annum equal
   to the Floating Rate for such day.  Changes in the rate of
   interest on that portion of any Advance maintained as a Floating
   Rate Advance will take effect simultaneously with each change in
   the Alternate Base Rate.  Each Eurocurrency Advance shall bear
   interest on the outstanding principal amount thereof from and
   including the first day of the Interest Period applicable thereto
   to (but not including) the last day of such Interest Period at
   the interest rate determined by the Agent as applicable to such
   Eurocurrency Advance based upon the Borrower's selections under
   Sections 2.8 and 2.9 and otherwise in accordance with the terms
   hereof.  No Interest Period may end after the Facility
   Termination Date.  The Borrower shall select Interest Periods so
   that it is not necessary to repay any portion of a Eurocurrency
   Advance prior to the last day of the applicable Interest Period
   in order to make a repayment required pursuant to Section 2.2.1.

         2.11.  Rates Applicable After Default. Notwithstanding
   anything to the contrary contained in Section 2.8 or 2.9, during
   the continuance of a Default the Required Lenders may, at their

                                     29
   <PAGE>

   option, by notice to the Borrower, declare that no Advance may be
   made as, converted into or continued as a Eurocurrency Advance in
   Dollars.  During the continuance of a Default the Required Lenders
   may, at their option, by notice to the Borrower (which notice may be
   revoked at the option of the Required Lenders notwithstanding any
   provision of Section 8.2 requiring unanimous consent of the
   Lenders to changes in interest rates), declare that (i) each
   Eurocurrency Advance shall bear interest for the remainder of the
   applicable Interest Period at the rate otherwise applicable to
   such Interest Period plus 2% per annum, (ii) each Floating Rate
   Advance shall bear interest at a rate per annum equal to the
   Floating Rate in effect from time to time plus 2% per annum and
   (iii) the letter of credit fee payable pursuant to Section 2.4.5
   shall be increased by 2% per annum above the fee otherwise
   applicable, provided that, during the continuance of a Default
   under Section 7.6 or 7.7, the interest rates and letter of credit
   fee set forth in clauses (i), (ii) and (iii) above shall be
   applicable to all Advances and Letters of Credit, respectively,
   without any election or action on the part of the Agent or any
   Lender.

         2.12.  Method of Payment.  (i)  Each Advance shall be repaid
   and each payment of interest thereon shall be paid in the currency
   in which such Advance was made.  All payments of the Obligations
   hereunder shall be made, without setoff, deduction, or counterclaim,
   in immediately available funds to the Agent at (except as set forth
   in the next sentence) the Agent's address specified pursuant to
   Article XIII, or at any other Lending Installation of the Agent
   specified in writing by the Agent to the Borrower, by 2:00 p.m.
   (local time) at the place of payment on the date when due and
   shall be applied ratably by the Agent among the Lenders.  All
   payments to be made by the Borrower hereunder in any currency
   other than Dollars shall be made in such currency on the date due
   in such funds as may then be customary for the settlement of
   international transactions in such currency for the account of
   the Agent, at its Eurocurrency Payment Office for such currency
   and shall be applied ratably by the Agent among the Lenders.
   Each payment delivered to the Agent for the account of any Lender
   shall be delivered promptly by the Agent to such Lender in the
   same type of funds that the Agent received at, (a) with respect
   to Floating Rate Loans and Eurocurrency Loans denominated in
   Dollars, its address specified pursuant to Article XIII or at any
   Lending Installation specified in a notice received by the Agent
   from such Lender and (b) with respect to Eurocurrency Loans
   denominated in an Agreed Currency other than Dollars, in the
   funds received from the Borrower at the address of the Agent's
   Eurocurrency Payment Office for such currency.

            (ii)  Notwithstanding the foregoing provisions of this
   Section, if, after the making of any Advance in any currency
   other than Dollars, currency control or exchange regulations are
   imposed in the country which issues such currency with the result
   that the type of currency in which the Advance was made (the
   "Original Currency") no longer exists or the Borrower is not able
   to make payment to the Agent for the account of the Lenders in
   such Original Currency, then all payments to be made by the
   Borrower hereunder in such currency shall instead be made when
   due in Dollars in an amount equal to the Dollar Amount (as of the
   date of repayment) of such payment due, it being the intention of
   the parties hereto that the Borrower take all risks of the
   imposition of any such currency control or exchange regulations.

         2.13.  Noteless Agreement; Evidence of Indebtedness.
   (i)  Each Lender shall maintain in accordance with its usual

                                     30
   <PAGE>

   practice an account or accounts evidencing the indebtedness of
   the Borrower to such Lender resulting from each Loan made by such
   Lender from time to time, including the amounts of principal and
   interest payable and paid to such Lender from time to time
   hereunder.

                                     31
   <PAGE>

            (ii)  The Agent shall also maintain accounts in which it
   will record (a) the amount of each Loan made hereunder, the
   Agreed Currency and Type thereof and the Interest Period with
   respect thereto, (b) the amount of any principal or interest due
   and payable or to become due and payable from the Borrower to
   each Lender hereunder and (c) the amount of any sum received by
   the Agent hereunder from the Borrower and each Lender's share
   thereof.

            (iii)  The entries maintained in the accounts maintained
   pursuant to paragraphs (i) and (ii) above shall be prima facie
   evidence of the existence and amounts of the Obligations therein
   recorded; provided, however, that the failure of the Agent or any
   Lender to maintain such accounts or any error therein shall not
   in any manner affect the obligation of the Borrower to repay the
   Obligations in accordance with their terms.

            (iv)  Any Lender may request that its Loans be evidenced by
   a promissory note (a "Note").  In such event, the Borrower shall
   prepare, execute and deliver to such Lender a Note payable to the
   order of such Lender in the form of Exhibit C-1 and/or C-2, as
   applicable.  Thereafter, the Loans evidenced by such Note and
   interest thereon shall at all times (including after any
   assignment pursuant to Section 12.3) be represented by one or
   more Notes payable to the order of the payee named therein or any
   assignee pursuant to Section 12.3, except to the extent that any
   such Lender or assignee subsequently returns any such Note for
   cancellation and requests that such Loans once again be evidenced
   as described in paragraphs (i) and (ii) above.

         2.14.  Telephonic Notices.  The Borrower hereby authorizes
   the Lenders and the Agent to extend, convert or continue Advances,
   effect selections of Agreed Currencies and Types of Advances and to
   transfer funds based on telephonic notices made by any person or
   persons the Agent in good faith believes to be acting on behalf of the
   Borrower, it being understood that the foregoing authorization is
   specifically intended to allow Borrowing Notices and
   Conversion/Continuation Notices to be given telephonically.  The
   Borrower agrees to deliver promptly to the Agent a written
   confirmation, if such confirmation is requested by the Agent, of
   each telephonic notice signed by an Authorized Officer.  If the
   written confirmation differs in any material respect from the
   action taken by the Agent and the Lenders, the records of the
   Agent and the Lenders shall govern absent manifest error.

         2.15.  Interest Payment Dates; Interest and Fee Basis.
   Interest accrued on each Floating Rate Advance shall be payable
   on the last day of each month, commencing with the first such
   date to occur after the date hereof, on any date on which the
   Floating Rate Advance is prepaid, whether due to acceleration or
   otherwise, and at maturity.  Interest accrued on that portion of
   the outstanding principal amount of any Floating Rate Advance
   converted into a Eurocurrency Advance on a day other than a
   Payment Date shall be payable on the date of conversion.
   Interest accrued on each Eurocurrency Advance shall be payable on
   the last day of its applicable Interest Period, on any date on
   which the Eurocurrency Advance is prepaid, whether by
   acceleration or otherwise, and at maturity.  Interest accrued on
   each Eurocurrency Advance having an Interest Period longer than
   three months shall also be payable on the last day of each three-
   month interval during such Interest Period.  Interest on
   Eurocurrency Advances, commitment fees and letter of credit fees

                                     32
   <PAGE>

   shall be calculated for actual days elapsed on the basis of a
   360-day year, and interest on Floating Rate Advances shall be
   calculated for actual days elapsed on the basis of a 365/366-day
   year.  Interest shall be payable for the day an Advance is made
   but not for the day of any payment on the amount paid if payment
   is received prior to 2:00 p.m. (local time) at the place of
   payment.  If any payment of principal of or interest on an
   Advance shall become due on a day which is not a Business Day,
   such payment shall be made on the next succeeding Business Day
   and, in the case of a principal payment, such extension of time
   shall be included in computing interest in connection with such
   payment.

         2.16.  Notification of Advances, Interest Rates, Prepayments
   and Commitment Reductions.  Promptly after receipt thereof (and in
   any event by 1:00 p.m., Chicago time, on the applicable Borrowing
   Date with respect to a Borrowing Notice for a Floating Rate Advance),
   the Agent will notify each Lender of the contents of each Aggregate
   Commitment reduction notice, Borrowing Notice, Conversion/Continuation
   Notice, and repayment notice received by it hereunder.  The Agent will
   notify each Lender of the interest rate applicable to each Eurocurrency
   Advance promptly upon determination of such interest rate and will give
   each Lender prompt notice of each change in the Alternate Base Rate.

         2.17.  Lending Installations.  Subject to Section 3.6, each Lender
   will book its Loans at the appropriate Lending Installation listed on
   the administrative information sheets provided to the Agent in
   connection herewith or such other Lending Installation designated
   by such Lender in accordance with the final sentence of this
   Section 2.17.  All terms of this Agreement shall apply to any
   such Lending Installation and the Loans and any Notes issued
   hereunder shall be deemed held by each Lender for the benefit of
   any such Lending Installation.  Subject to Section 3.6, each
   Lender may, by written notice to the Agent and the Borrower in
   accordance with Article XIII, designate replacement or additional
   Lending Installations through which Loans will be made by it and
   for whose account Loan payments are to be made.

         2.18.  Non-Receipt of Funds by the Agent.   Unless the
   Borrower or a Lender, as the case may be, notifies the Agent
   prior to the date on which it is scheduled to make payment to the
   Agent of (i) in the case of a Lender, the proceeds of a Loan or
   (ii) in the case of the Borrower, a payment of principal,
   interest or fees to the Agent for the account of the Lenders,
   that it does not intend to make such payment, the Agent may
   assume that such payment has been made.  The Agent may, but shall
   not be obligated to, make the amount of such payment available to
   the intended recipient in reliance upon such assumption.  If such
   Lender or the Borrower, as the case may be, has not in fact made
   such payment to the Agent, the recipient of such payment shall,
   on demand by the Agent, repay to the Agent the amount so made
   available together with interest thereon in respect of each day
   during the period commencing on the date such amount was so made
   available by the Agent until the date the Agent recovers such
   amount at a rate per annum equal to (x) in the case of payment by
   a Lender, the Federal Funds Effective Rate for such day for the
   first three days and, thereafter, the interest rate applicable to
   the relevant Loan or (y) in the case of payment by the Borrower,
   the interest rate applicable to the relevant Loan.

         2.19.  Replacement of Lender.  If the Borrower is required
   pursuant to Section 3.1, 3.2 or 3.5 to make any additional payment

                                     33
   <PAGE>

   to any Lender or if any Lender's obligation to make or continue,
   or to convert Floating Rate Advances into, Eurocurrency Advances
   shall be suspended pursuant to Section 3.3 (any Lender so affected
   an "Affected Lender"), the Borrower may elect to replace such
   Affected Lender as a Lender party to this Agreement, provided
   that no Default or Unmatured Default shall have occurred and be
   continuing at the time of such replacement, and provided further
   that, concurrently with such replacement, (i) another bank or
   other entity which is reasonably satisfactory to the Borrower and
   the Agent shall agree, as of such date, to purchase for cash the
   Advances and other Obligations owing to the Affected Lender
   pursuant to an assignment substantially in the form of Exhibit B
   and to become a Lender for all purposes under this Agreement and
   to assume all obligations of the Affected Lender to be terminated
   as of such date and to comply with the requirements of Section
   12.3 applicable to assignments, and (ii) the Borrower shall pay
   to such Affected Lender in same day funds on the day of such
   replacement (A) all interest, fees and other amounts then accrued
   but unpaid to such Affected Lender by the Borrower hereunder to
   and including the date of termination, including without
   limitation payments due to such Affected Lender under Sections
   3.1, 3.2 and 3.5, and (B) an amount, if any, equal to the payment
   which would have been due to such Lender on the day of such
   replacement under Section 3.4 had the Loans of such Affected
   Lender been prepaid on such date rather than sold to the
   replacement Lender.

         2.20.  Market Disruption.   Notwithstanding the satisfaction
    of all conditions referred to in Article II and Article IV with
    respect to any Advance in any Agreed Currency other than Dollars,
    if there shall occur on or prior to the date of such Advance any
    change in national or international financial, political or economic
   conditions or currency exchange rates or exchange controls which
   would in the reasonable opinion of the Agent or the Required
   Lenders make it impracticable for the Eurocurrency Loans
   comprising such Advance to be denominated in the Agreed Currency
   specified by the Borrower, then the Agent shall forthwith give
   notice thereof to the Borrower and the Lenders, and such Loans
   shall not be denominated in such Agreed Currency but shall be
   made on such Borrowing Date in Dollars, in an aggregate principal
   amount equal to the Dollar Amount of the aggregate principal
   amount specified in the related Borrowing Notice or
   Conversion/Continuation Notice, as the case may be, as Floating
   Rate Loans, unless the Borrower notifies the Agent prior to 10:00
   a.m. on such Borrowing Date that it elects not to borrow on such
   date.

         2.21.  Judgment Currency.   If for the purposes of obtaining
   judgment in any court it is necessary to convert a sum due from the
   Borrower hereunder in the currency expressed to be payable herein
   (the "specified currency") into another currency, the parties hereto
   agree, to the fullest extent that they may effectively do so, that
   the rate of exchange used shall be that at which in accordance with
   normal banking procedures the Agent could purchase the specified
   currency with such other currency at the Agent's main Chicago
   office on the Business Day preceding that on which final,
   non-appealable judgment is given.  The obligations of the
   Borrower in respect of any sum due to any Lender or the Agent
   hereunder shall, notwithstanding any judgment in a currency other
   than the specified currency, be discharged only to the extent
   that on the Business Day following receipt by such Lender or the
   Agent (as the case may be) of any sum adjudged to be so due in
   such other currency such Lender or the Agent (as the case may be)
   may in accordance with normal, reasonable banking procedures
   purchase the specified currency with such other currency.  If the

                                     34
   <PAGE>

   amount of the specified currency so purchased is less than the
   sum originally due to such Lender or the Agent, as the case may
   be, in the specified currency, the Borrower agrees, to the
   fullest extent that it may effectively do so, as a separate
   obligation and notwithstanding any such judgment, to indemnify
   such Lender or the Agent, as the case may be, against such loss,
   and if the amount of the specified currency so purchased exceeds
   (a) the sum originally due to any Lender or the Agent, as the
   case may be, in the specified currency and (b) any amounts shared
   with other Lenders as a result of allocations of such excess as a
   disproportionate payment to such Lender under Section 11.2, such
   Lender or the Agent, as the case may be, agrees to remit such
   excess to the Borrower.


                               ARTICLE III

                         YIELD PROTECTION; TAXES


         3.1.  Yield Protection.  If, on or after the date of this
   Agreement, the adoption of any law or any governmental or
   quasi-governmental rule, regulation, policy, guideline or directive
   (whether or not having the force of law), or any change in the
   interpretation or administration thereof by any governmental or
   quasi-governmental authority, central bank or comparable agency
   charged with the interpretation or administration thereof, or
   compliance by any Lender or applicable Lending Installation with any
   request or directive (whether or not having the force of law) of any
   such authority, central bank or comparable agency first made after the
   date hereof:

            (i)    subjects any Lender or any applicable Lending
                   Installation to any Taxes, or changes the basis of
                   taxation of payments (other than with respect to
                   Excluded Taxes) to any Lender in respect of its
                   Eurocurrency Loans, or

            (ii)   imposes or increases or deems applicable any reserve,
                   assessment, insurance charge, special deposit or
                   similar requirement against assets of, deposits with or
                   for the account of, or credit extended by, any Lender
                   or any applicable Lending Installation (other than any
                   component of the Reserve Requirement taken into account
                   in determining the interest rate applicable to
                   Eurocurrency Advances), or

            (iii)  imposes any other condition the result of which is to
                   increase the cost to any Lender or any applicable
                   Lending Installation of making, funding or maintaining
                   its Eurocurrency Loans or reduces any amount receivable
                   by any Lender or any applicable Lending Installation in
                   connection with its Eurocurrency Loans, or requires any
                   Lender or any applicable Lending Installation to make
                   any payment calculated by reference to the amount of
                   Eurocurrency Loans held or interest received by it, by
                   an amount reasonably deemed material by such Lender,

   and the result of any of the foregoing is to increase the cost to
   such Lender or applicable Lending Installation of making or
   maintaining its Eurocurrency Loans or Commitment or to reduce the

                                     35
   <PAGE>

   return received by such Lender or applicable Lending Installation
   in connection with such Eurocurrency Loans or Commitment, then,
   within 15 days of demand by such Lender, the Borrower shall pay
   such Lender such additional amount or amounts as will compensate
   such Lender for such increased cost or reduction in amount
   received.

         3.2.  Changes in Capital Adequacy Regulations.  If a Lender
   (including any Lender in its capacity as the Issuing Lender)
   reasonably determines that the amount of capital required or
   expected to be maintained by such Lender, any Lending
   Installation of such Lender or any corporation controlling such
   Lender is increased as a result of a Change, then, within 15 days
   of demand by such Lender, the Borrower shall pay such Lender the
   amount necessary to compensate for any shortfall in the rate of
   return on the portion of such increased capital which such Lender
   reasonably determines is attributable to this Agreement, its
   Loans, its L/C Interests or its Commitment to make Loans or to
   issue or participate in Letters of Credit hereunder (after taking
   into account such Lender's policies as to capital adequacy).
   "Change" means (i) any change after the date of this Agreement in
   the Risk-Based Capital Guidelines or (ii) any adoption of or
   change in any other law, governmental or quasi-governmental rule,
   regulation, policy, guideline, interpretation, or directive
   (whether or not having the force of law) after the date of this
   Agreement which affects the amount of capital required or
   expected to be maintained by any Lender or any Lending
   Installation or any corporation controlling any Lender.
   "Risk-Based Capital Guidelines" means (i) the risk-based capital
   guidelines in effect in the United States on the date of this
   Agreement and (ii) the corresponding capital regulations
   promulgated by regulatory authorities outside the United States
   implementing the July 1988 report of the Basle Committee on
   Banking Regulation and Supervisory Practices Entitled
   "International Convergence of Capital Measurements and Capital
   Standards" and any amendments to such regulations adopted prior
   to the date of this Agreement.

         3.3.  Availability of Types of Advances.  If any Lender
   determines that maintenance of its Eurocurrency Loans at a
   suitable Lending Installation would violate any applicable law,
   rule, regulation, or directive, whether or not having the force
   of law, or if the Required Lenders determine that (i) deposits of
   a type, currency and maturity appropriate to match fund
   Eurocurrency Advances are not available or (ii) the interest rate
   applicable to Eurocurrency Advances does not accurately reflect
   the cost of making or maintaining Eurocurrency Advances, then the
   Agent shall suspend the availability of Eurocurrency Advances
   (until the Agent shall notify the Borrower and the Lenders that
   the circumstances causing such suspension no longer exist) and
   require any affected Eurocurrency Advances to be repaid or
   converted to Floating Rate Advances, subject to the payment of
   any funding indemnification amounts required by Section 3.4.

         3.4.  Funding Indemnification.   If any payment of a
   Eurocurrency Advance occurs on a date which is not the last
   day of the applicable Interest Period, whether because of
   acceleration, prepayment or otherwise, or a Eurocurrency Advance
   is not made on the date specified by the Borrower for any reason
   other than default by one or more Lenders, the Borrower will
   indemnify each Lender (other than any Lender in default of its
   obligations under this Agreement) for any loss or cost actually
   incurred by it resulting therefrom, including, without limitation,
   any loss or cost in liquidating or employing deposits acquired to
   fund or maintain such Eurocurrency Advance, but in any event not

                                     36
   <PAGE>

   including lost profits.

         3.5.  Taxes.  (i)  All payments by the Borrower to or for the
   account of any Lender or the Agent hereunder or under any Note shall
   be made free and clear of and without deduction or withholding for
   any and all Taxes.  If the Borrower shall be required by law to deduct
   or withhold any Taxes from or in respect of any sum payable hereunder
   to any Lender or the Agent, (a) the sum payable shall be increased as
   necessary so that after making all required deductions (including
   deductions applicable to additional sums payable under this Section
   3.5) such Lender or the Agent (as the case may be) receives an amount
   equal to the sum it would have received had no such deductions
   been made, (b) the Borrower shall make such deductions, (c) the
   Borrower shall pay the full amount deducted to the relevant
   authority in accordance with applicable law and (d) the Borrower
   shall furnish to the Agent the original copy of a receipt
   evidencing payment thereof within 30 days after such payment is
   made.

         (ii)   In addition, the Borrower hereby agrees to pay any
   present or future stamp or documentary taxes and any other excise
   or property taxes, charges or similar levies which arise from any
   payment made hereunder or under any Note or from the execution or
   delivery of, or otherwise with respect to, this Agreement or any
   Note ("Other Taxes").

         (iii)  The Borrower hereby agrees to indemnify the Agent and
   each Lender for the full amount of Taxes or Other Taxes
   (including, without limitation, any Taxes or Other Taxes imposed
   on amounts payable under this Section 3.5) paid by the Agent or
   such Lender and any liability (including penalties, interest and
   expenses) arising therefrom or with respect thereto.  Payments
   due under this indemnification shall be made within 30 days of
   the date the Agent or such Lender makes demand therefor pursuant
   to Section 3.6.

         (iv)   Each Lender that is not incorporated under the laws of
   the United States of America or a state thereof (each a "Non-U.S.
   Lender") agrees that it will, not less than ten Business Days
   after the date of this Agreement, (i) deliver to each of the
   Borrower and the Agent two duly completed copies of United States
   Internal Revenue Service Form 1001 or 4224, certifying in either
   case that such Lender is entitled to receive payments under this
   Agreement without deduction or withholding of any United States
   federal income taxes, and (ii) deliver to each of the Borrower
   and the Agent a United States Internal Revenue Form W-8 or W-9,
   as the case may be, and certify that it is entitled to an
   exemption from United States backup withholding tax.  Each Non-
   U.S. Lender further undertakes to deliver to each of the Borrower
   and the Agent (x) renewals or additional copies of such form (or
   any successor form) on or before the date that such form expires
   or becomes obsolete, and (y) after the occurrence of any event
   requiring a change in the most recent forms so delivered by it,
   such additional forms or amendments thereto as may be reasonably
   requested by the Borrower or the Agent.  All forms or amendments
   described in the preceding sentence shall certify that such
   Lender is entitled to receive payments under this Agreement
   without deduction or withholding of any United States federal
   income taxes, unless an event (including without limitation any
   change in treaty, law or regulation) has occurred prior to the
   date on which any such delivery would otherwise be required which
   renders all such forms inapplicable or which would prevent such

                                     37
   <PAGE>

   Lender from duly completing and delivering any such form or
   amendment with respect to it and such Lender advises the Borrower
   and the Agent that it is not capable of receiving payments
   without any deduction or withholding of United States federal
   income tax.

                                     38
   <PAGE>


         (v)    For any period during which a Non-U.S. Lender has
   failed to provide the Borrower with an appropriate form pursuant
   to clause (iv), above (unless such failure is due to a change in
   treaty, law or regulation, or any change in the interpretation or
   administration thereof by any governmental authority, occurring
   subsequent to the date on which a form originally was required to
   be provided), such Non-U.S. Lender shall not be entitled to
   indemnification under this Section 3.5 with respect to Taxes
   imposed by the United States; provided that, should a Non-U.S.
   Lender which is otherwise exempt from or subject to a reduced
   rate of withholding tax become subject to Taxes because of its
   failure to deliver a form required under clause (iv), above, the
   Borrower shall take such steps as such Non-U.S. Lender shall
   reasonably request to assist such Non-U.S. Lender to recover such
   Taxes.

         (vi)   Any Lender that is entitled to an exemption from or
   reduction of withholding tax with respect to payments under this
   Agreement or any Note pursuant to the law of any relevant
   jurisdiction or any treaty shall deliver to the Borrower (with a
   copy to the Agent), at the time or times prescribed by applicable
   law, such properly completed and executed documentation
   prescribed by applicable law as will permit such payments to be
   made without withholding or at a reduced rate.

         (vii)  If the U.S. Internal Revenue Service or any other
   governmental authority of the United States or any other country
   or any political subdivision thereof asserts a claim that the
   Agent did not properly withhold tax from amounts paid to or for
   the account of any Lender (because the appropriate form was not
   delivered or properly completed, because such Lender failed to
   notify the Agent of a change in circumstances which rendered its
   exemption from withholding ineffective, or for any other reason),
   such Lender shall indemnify the Agent fully for all amounts paid,
   directly or indirectly, by the Agent as tax, withholding
   therefor, or otherwise, including penalties and interest, and
   including taxes imposed by any jurisdiction on amounts payable to
   the Agent under this subsection, together with all costs and
   expenses related thereto (including attorneys fees and time
   charges of attorneys for the Agent, which attorneys may be
   employees of the Agent).  The obligations of the Lenders under
   this Section 3.5(vii) shall survive the payment of the
   Obligations and termination of this Agreement.

         3.6.  Lender Statements; Survival of Indemnity.  To the extent
   reasonably possible, each Lender shall designate an alternate Lending
   Installation with respect to its Eurocurrency Loans to reduce any
   liability of the Borrower to such Lender under Sections 3.1, 3.2 and
   3.5 or to avoid the unavailability of Eurocurrency Advances under
   Section 3.3, so long as such designation is not, in the judgment of such
   Lender, disadvantageous to such Lender.  Each Lender shall
   deliver a written statement of such Lender to the Borrower (with
   a copy to the Agent) as to the amount due, if any, under Section
   3.1, 3.2, 3.4 or 3.5.  Such written statement shall set forth in
   reasonable detail the calculations upon which such Lender
   determined such amount and shall be final, conclusive and binding
   on the Borrower in the absence of manifest error.  Determination
   of amounts payable under such Sections in connection with a
   Eurocurrency Loan shall be calculated as though each Lender
   funded its Eurocurrency Loan through the purchase of a deposit of
   the type, currency and maturity corresponding to the deposit used
   as a reference in determining the Eurocurrency Rate applicable to
   such Loan, whether in fact that is the case or not.  Unless
   otherwise provided herein, the amount specified in the written
   statement of any Lender shall be payable within fifteen days

                                     39
   <PAGE>

   after receipt by the Borrower of such written statement.  The
   obligations of the Borrower under Sections 3.1, 3.2, 3.4 and 3.5
   shall survive payment of the Obligations and termination of this
   Agreement.

                                 ARTICLE IV

                             CONDITIONS PRECEDENT


         4.1.  Initial Advance.  The Lenders shall not be required
   to make the initial Loans hereunder unless (a) such initial Loans
   are made not later than November 1, 1999, (b) the PSD Acquisition
   has been (or concurrently therewith will be) consummated, (c) the
   Borrower has furnished to the Agent the documents listed on the
   List of Closing Documents attached hereto as Schedule 4.1, (d) the
   Borrower has received not less than $100,000,000 in proceeds from
   the Bridge Loan on the terms and conditions set forth in the
   Bridge Loan Agreement or from Permitted Subordinated
   Indebtedness, (e) the Borrower has paid (or made arrangements to
   pay concurrently with the making of the initial Loans) all
   principal, interest, fees and premiums, if any, on all loans
   outstanding under the Existing Credit Agreement and has
   terminated such agreement, and (f) the Borrower has paid to the
   Agent and the Arranger the fees agreed to in the letter agreement
   dated July 2, 1999 then due and owing.

         4.2.  Each Advance and Letter of Credit.  The Lenders shall
   not be required to make any Advance, and the Issuing Lender shall
   not be required to issue any Letter of Credit, unless on the applicable
   Borrowing Date or date of issuance:

         (i)   There exists no Default or Unmatured Default.

         (ii)  The representations and warranties contained in Article
   V are true and correct as of such Borrowing Date or
   date of issuance except to the extent any such
   representation or warranty is stated to relate solely
   to an earlier date, in which case such representation
   or warranty shall have been true and correct on and as
   of such earlier date.

         Each Borrowing Notice with respect to each such Advance and
   each application with respect to each such Letter of Credit shall
   constitute a representation and warranty by the Borrower that the
   conditions contained in Section 4.2(i) and (ii) have been
   satisfied.  Subject to Section 2.11, the conditions contained in
   this Section 4.2 shall not apply to the conversion or
   continuation of all or any portion of any outstanding Advance.

                                     40
   <PAGE>


                                  ARTICLE V

                        REPRESENTATIONS AND WARRANTIES


         The Borrower represents and warrants to the Lenders that:

         5.1.  Existence and Standing.  Each of the Borrower and
   its Subsidiaries is a corporation, partnership (in the case of
   Subsidiaries only) or limited liability company duly and properly
   incorporated or organized, as the case may be, validly existing
   and (to the extent such concept applies to such entity) in good
   standing under the laws of its jurisdiction of incorporation or
   organization and has all requisite authority to own, operate and
   encumber its Property and to conduct its business, as presently
   conducted and as proposed to be conducted giving effect to the
   PSD Acquisition, in each jurisdiction in which its business is
   conducted, except for any failure to be so authorized that could
   not reasonably be expected to have a Material Adverse Effect.

         5.2.  Authorization and Validity.  Each Loan Party has the
   power and authority and legal right to execute and deliver the Loan
   Documents to which it is a party and to perform its obligations
   thereunder.  The execution and delivery by each Loan Party of the Loan
   Documents to which it is a party and the performance of its
   obligations thereunder have been duly authorized by proper
   corporate (or equivalent) proceedings, and the Loan Documents to
   which such Loan Party is a party constitute legal, valid and
   binding obligations of such Loan Party enforceable against such
   Loan Party in accordance with their respective terms, except as
   enforceability may be limited by bankruptcy, insolvency or
   similar laws affecting the enforcement of creditors' rights
   generally.

         5.3.  No Conflict; Government Consent.  Neither the execution
   and delivery by the Loan Parties of the Loan Documents, nor the
   consummation of the transactions therein contemplated, nor
   compliance with the provisions thereof will violate (i) any law,
   rule, regulation, order, writ, judgment, injunction, decree or
   award binding on the Borrower or any of its Subsidiaries or (ii)
   the Borrower's or any Subsidiary's articles or certificate of
   incorporation, partnership agreement, certificate of partnership,
   articles or certificate of organization, by-laws, or operating or
   other management agreement, as the case may be, or (iii) the
   provisions of any indenture, instrument or agreement to which the
   Borrower or any of its Subsidiaries is a party or is subject, or
   by which it, or its Property, is bound, or conflict with or
   constitute a default thereunder, or result in, or require, the
   creation or imposition of any Lien in, of or on the Property of
   the Borrower or any Subsidiary pursuant to the terms of any such
   indenture, instrument or agreement.  No order, consent,
   adjudication, approval, license, authorization, or validation of,
   or filing, recording or registration with, or exemption by, or
   other action in respect of any Governmental Authority which has
   not been obtained by the Borrower or any of its Subsidiaries, is
   required to be obtained by the Borrower or any of its
   Subsidiaries in connection with the execution and delivery of the
   Loan Documents, the borrowings under this Agreement, the payment
   and performance by the Borrower of the Obligations or the
   legality, validity, binding effect or enforceability of any of
   the Loan Documents, except (i) filings, consents or notices which
   have been made, obtained or given, or which, if not made,

                                     41
   <PAGE>

   obtained or given, individually or in the aggregate could not
   reasonably be expected to have a Material Adverse Effect, and
   (ii) filings necessary to create or perfect security interests in
   the Collateral.

         5.4.  Financial Statements.  (a)  The December 31, 1998 audited
   consolidated financial statements and the March 31, 1999 and June
   30, 1999 unaudited consolidated financial statements of the
   Borrower and its Subsidiaries heretofore delivered to the Lenders
   were prepared in accordance with generally accepted accounting
   principles in effect on the date such statements were prepared
   and fairly present the consolidated financial condition and
   operations of the Borrower and its Subsidiaries at such dates and
   the consolidated results of their operations for the periods then
   ended, subject, in the case of such unaudited financial
   statements, to normal year-end adjustments and the absence of
   notes.

            (b)  The December 31, 1998, financial statements of the
   Acquired Business and any additional financial statements of the
   Acquired Business required by the Securities and Exchange
   Commission heretofore delivered to the Lenders were prepared in
   accordance with U.S. generally accepted accounting principles in
   effect on the date such statements were prepared and fairly
   present the financial condition and operations of the Acquired
   Business at such dates and the results of its operations for the
   periods then ended.

            (c)  The pro forma financial statements of the Borrower
   and its Subsidiaries, copies of which are attached hereto as
   Schedule 5.4, present on a pro forma basis the financial
   condition of the Borrower and its Subsidiaries as of such date,
   and reflect on a pro forma basis those liabilities reflected in
   the notes thereto and resulting from consummation of the PSD
   Acquisition, the transactions contemplated by this Agreement and
   the Bridge Loan Agreement, and the payment or accrual of all
   costs and expenses with respect to any of the foregoing.  The
   projections and assumptions expressed in such pro forma
   financials were prepared in good faith and represent good faith
   assumptions and estimates on the part of the Borrower based on
   the information available to the Borrower at the time so
   prepared.

         5.5.  Material Adverse Change.  Since December 31, 1998
   there has been no change in the business, Property, condition
   (financial or otherwise) or results of operations of the Borrower
   and its Subsidiaries taken as a whole, including, without
   limitation, the Acquired Business, which could reasonably be
   expected to have a Material Adverse Effect.

         5.6.  Taxes.  The Borrower and its Subsidiaries have filed
   all United States federal tax returns and all other tax returns
   which are required to be filed and have paid all taxes due pursuant
   to said returns or pursuant to any assessment received by the Borrower
   or any of its Subsidiaries, except such taxes, if any, as are not
   yet due and payable or are being contested in good faith and as to
   which adequate reserves have been provided in accordance with
   Agreement Accounting Principles.  The United States income tax returns
   of the Borrower and its Subsidiaries have been audited by the Internal
   Revenue Service through the fiscal year ended December 31, 1994.  No tax
   liens have been filed and no claims are being asserted with
   respect to any such taxes.  The charges, accruals and reserves on
   the books of the Borrower and its Subsidiaries in respect of any

                                     42
   <PAGE>

   taxes are adequate in accordance with Agreement Accounting Principles.

         5.7.  Litigation and Contingent Obligations.  Except as set
   forth on Schedule 5.7,  there is no litigation, arbitration,
   governmental investigation, proceeding or inquiry pending or, to
   the knowledge of any of their officers, threatened against or
   affecting the Borrower or any of its Subsidiaries which could
   reasonably be expected to have a Material Adverse Effect or which
   seeks to prevent, enjoin or delay the making of any Loans.  Other
   than any liability incident to any litigation, arbitration or
   proceeding which (i) could not reasonably be expected to have a
   Material Adverse Effect or (ii) is set forth on Schedule 5.7, the
   Borrower and its Subsidiaries have no material contingent
   obligations not provided for or disclosed in the financial
   statements referred to in Section 5.4.

         5.8.  Subsidiaries.  Schedule 5.8 contains an accurate list
   of all Subsidiaries of the Borrower as of the date of this Agreement
   after giving effect to the PSD Acquisition, setting forth their
   respective jurisdictions of organization and the percentage of their
   respective Equity Interests owned by the Borrower or other
   Subsidiaries.  All of the issued and outstanding Equity Interests
   of such Subsidiaries have been (to the extent such concepts are
   relevant with respect to such ownership interests) duly authorized
   and issued and are fully paid and non-assessable.

         5.9.  ERISA.  Except as could not reasonably be expected,
   individually or in the aggregate, to have a Material Adverse Effect:
   there are no Unfunded Liabilities under any Single Employer Plans;
   neither the Borrower nor any other member of the Controlled Group
   has incurred, or is reasonably expected to incur, any withdrawal
   liability to Multiemployer Plans; each Plan complies in all material
   respects with all applicable requirements of law and regulations; no
   Reportable Event has occurred with respect to any Plan; neither
   the Borrower nor any other member of the Controlled Group has
   withdrawn from any Plan or initiated steps to do so; and no steps
   have been taken to reorganize or terminate any Plan.

         5.10.  Accuracy of Information.  No information, exhibit or
   report furnished by the Borrower or any of its Subsidiaries to the
   Agent or to any Lender in connection with the negotiation of, or
   compliance with, the Loan Documents contained any material
   misstatement of fact or omitted to state a material fact or any fact
   necessary to make the statements contained therein not materially
   misleading in a manner relied upon by the Lenders to their detriment.

         5.11.  Regulation U.  Neither the Borrower nor any of its
   Subsidiaries is engaged in the business of extending credit for the
   purpose of purchasing or carrying Margin Stock (as defined in
   Regulation U).

         5.12.  Material Agreements.  Neither the Borrower nor any
   Subsidiary is a party to any agreement or instrument or subject to
   any charter or other corporate restriction which could reasonably
   be expected to have a Material Adverse Effect.  Neither the Borrower
   nor any Subsidiary is in default in the performance, observance or
   fulfillment of any of the obligations, covenants or conditions
   contained in any agreement (other than agreements or instruments

                                     43
   <PAGE>

   evidencing or governing Indebtedness) to which it is a party,
   which default could reasonably be expected to have a Material
   Adverse Effect.

         5.13.  Compliance With Laws.  The Borrower and its
   Subsidiaries have complied with all applicable statutes, rules,
   regulations, orders and restrictions of any Governmental Authority
   having jurisdiction over the conduct of their respective businesses
   or the ownership of their respective Property, except for any
   failure to comply with any of the foregoing which could not
   reasonably be expected to have a Material Adverse Effect.

         5.14.  Ownership of Properties.  Except as set forth on
   Schedule 6.15, on the date of this Agreement, the Borrower and its
   Subsidiaries will have good title, free of all Liens other than
   those permitted by Section 6.15, to all of the Property and assets
   reflected in the Borrower's most recent consolidated financial
   statements provided to the Agent as owned by the Borrower and its
   Subsidiaries and all other Property material to the Borrower's and
   its Subsidiaries' businesses, except as sold or otherwise disposed of
   in the ordinary course of business.  The Borrower and each
   Subsidiary (i) owns and/or possesses all the patents, trademarks,
   trade names, service marks, copyrights, licenses and rights with
   respect to the foregoing necessary for the present conduct of its
   business without any known conflict with the rights of others,
   and (ii) owns and/or possesses and/or has applied for all the
   patents, trademarks, trade names, service marks, copyrights,
   licenses and rights with respect to the foregoing necessary for
   the planned conduct of its business for the next six months,
   without any known conflict with the rights of others, except,
   with respect to clauses (i) and (ii), where the failure to own
   and/or possess any patents, trademarks, trade names, service
   marks, copyrights, licenses and/or rights could not reasonably be
   expected to have a Material Adverse Effect and/or subject the
   Borrower or any Subsidiary to any material liability in
   connection with any infringement and/or similar cause of action
   related to any of the foregoing.

         5.15.  Plan Assets; Prohibited Transactions.  The Borrower
   is not an entity deemed to hold "plan assets" within the meaning of
   29 C.F.R. Section 2510.3-101 of an employee benefit plan (as defined
   in Section 3(3) of ERISA) which is subject to Title I of ERISA or any
   plan (within the meaning of Section 4975 of the Code), and neither
   the execution of this Agreement nor the making of Loans or issuance
   of Letters of Credit hereunder gives rise to a prohibited transaction
   (within the meaning of Section 406 of ERISA or Section 4975 of the
   Code) with respect to "plan assets" of the Borrower and its
   Subsidiaries.

         5.16.  Environmental Matters.  In the ordinary course of its
   business, the officers of the Borrower consider the effect of
   Environmental Laws on the business of the Borrower and its
   Subsidiaries, in the course of which they identify and evaluate
   potential risks and liabilities accruing to the Borrower due to
   Environmental Laws.  On the basis of this consideration, the Borrower
   has concluded that Environmental Laws could not reasonably be
   expected to have a Material Adverse Effect.  Neither the Borrower
   nor any Subsidiary has received any notice to the effect that its
   operations are not in material compliance with any of the
   requirements of applicable Environmental Laws or are the subject
   of any investigation by any Governmental Authority evaluating
   whether any remedial action is needed to respond to a release of
   any toxic or hazardous waste or substance into the environment,

                                     44
   <PAGE>

   which non-compliance or remedial action could reasonably be
   expected to have a Material Adverse Effect.

         5.17.  Investment Company Act.  Neither the Borrower nor
   any Subsidiary is an "investment company" or a company "controlled"
   by an "investment company", within the meaning of the Investment
   Company Act of 1940, as amended.

         5.18.  Public Utility Holding Company Act.  Neither the
   Borrower nor any Subsidiary is a "holding company" or a
   "subsidiary company" of a "holding company", or an "affiliate" of
   a "holding company" or of a "subsidiary company" of a "holding
   company", within the meaning of the Public Utility Holding Company
   Act of 1935, as amended.

         5.19.  Year 2000.  The Borrower has generally completed its
   assessment of Year 2000 Issues and has a realistic program (the "Year
   2000 Program") for completing required remediations and replacements
   of its assets on a timely basis.  The Borrower has identified
   significant suppliers and is requesting information from them regarding
   the Year 2000 readiness of their products and services, but it has
   not, as of the date hereof, received sufficient responses to
   ascertain that a material adverse impact can be avoided as a
   result of the failure of such suppliers to deliver products and
   services after December 31, 1999.  Except as set forth in the
   preceding sentence and for Year 2000 Issues affecting the United
   States and international economies generally, based on its
   assessment and Year 2000 Program the Borrower does not anticipate
   that Year 2000 Issues will have a Material Adverse Effect.

         5.20.  Subordinated Indebtedness.  The Secured Obligations
   constitute senior indebtedness which is entitled to the benefits
   of the subordination provisions of all outstanding Subordinated
   Indebtedness.

         5.21.  Post-Retirement Benefits.  As of the Closing Date,
   neither the Borrower nor any of its Subsidiaries has any expected
   costs of post-retirement medical and insurance benefits payable
   to their employees and former employees, as estimated by the
   Borrower in accordance with Financial Accounting Standards Board
   Statement No. 106.

         5.22.  Insurance.  Schedule 5.22 accurately sets forth as of
   the Closing Date all insurance policies and programs currently in
   effect with respect to the respective properties and assets and
   business of the Borrower and its Domestic Subsidiaries, specifying,
   for each such policy and program, (i) the amount thereof, (ii) the
   risks insured against thereby, (iii) the name of the insurer and each
   insured party thereunder, (iv) the policy or other identification
   number thereof, (v) the expiration date thereof, (vi) the annual
   premium with respect thereto, and (vii) any reserves relating to
   any self-insurance program that is in effect.

         5.23.  The PSD Acquisition.  As of the Closing Date and
   immediately prior to the making of the initial Loans:

            (i)    the PSD Purchase Agreement is in full force and
   effect, no material breach, default or waiver of any term or

                                     45
   <PAGE>

   provision of the PSD Purchase Agreement by the Borrower or
   any of its Subsidiaries or, to the best of the Borrower's
   knowledge, the other parties thereto has occurred (except
   for such breaches, defaults and waivers, if any, consented
   to in writing by the Agent) and no action has been taken by
   any competent Governmental Authority which restrains,
   prevents or imposes any material adverse condition upon, or
   seeks to restrain, prevent or impose any material adverse
   condition upon, the PSD Acquisition;

            (ii)   the representations and warranties of each of the
   Borrower and, to the Borrower's knowledge, the Sellers (as
   defined in the PSD Purchase Agreement) contained in the PSD
   Purchase Agreement are true and correct in all material
   respects;

            (iii)  except as set forth on Schedule 5.7, to the
   Borrower's knowledge, there is no litigation, arbitration,
   governmental investigation, proceeding or inquiry pending or
   threatened against Pasteur Sanofi Diagnostics S.A. or any of
   its Subsidiaries which could reasonably be expected to have
   a material adverse effect on the business, Property,
   condition (financial or otherwise) or results of operations
   of Pasteur Sanofi Diagnostics S.A. and its Subsidiaries,
   taken as a whole; and

            (iv)   all material conditions precedent to, and all
   material consents and material regulatory approvals
   necessary to permit, the PSD Acquisition pursuant to the PSD
   Purchase Agreement have been satisfied or waived with the
   prior written consent of the Agent; but for the payment of
   the purchase price, the PSD Acquisition has been
   consummated, or concurrently with the making of the initial
   Loans hereunder will be consummated, in accordance with the
   PSD Purchase Agreement and applicable law; the aggregate
   purchase price for the Acquired Business under the PSD
   Purchase Agreement does not exceed the equivalent of U.S.
   $210,000,000; and upon the payment of the purchase price the
   Borrower will obtain good and marketable title to the
   "Shares" (as defined in the PSD Purchase Agreement) free and
   clear of any Liens other than Liens permitted under
   Section 6.15.

         5.24. Solvency.   (i) Immediately after the consummation
   of the transactions to occur on the date hereof and immediately
   following the making of each Loan, if any, made on the date hereof
   and after giving effect to the application of the proceeds of such
   Loans, (a) the fair value of the assets of the Borrower and its
   Subsidiaries on a consolidated basis, at a fair valuation, will
   exceed the debts and liabilities, subordinated, contingent or
   otherwise, of the Borrower and its Subsidiaries on a consolidated
   basis; (b) the present fair saleable value of the Property of the
   Borrower and its Subsidiaries on a consolidated basis will be greater
   than the amount that will be required to pay the probable liability of
   the Borrower and its Subsidiaries on a consolidated basis on their
   debts and other liabilities, subordinated, contingent or
   otherwise, as such debts and other liabilities become absolute
   and matured; (c) the Borrower and its Subsidiaries on a
   consolidated basis will be able to pay their debts and
   liabilities, subordinated, contingent or otherwise, as such debts
   and liabilities become absolute and matured; and (d) the Borrower
   and its Subsidiaries on a consolidated basis will not have
   unreasonably small capital with which to conduct the businesses
   in which they are engaged as such businesses are now conducted
   and are proposed to be conducted after the date hereof.

                                     46
   <PAGE>

            (ii)   The Borrower does not intend to, or to permit any of
   its Subsidiaries to, and does not believe that it or any of its
   Subsidiaries will, incur debts beyond its ability to pay such
   debts as they mature, taking into account the timing of and
   amounts of cash to be received by it or any such Subsidiary and
   the timing of the amounts of cash to be payable on or in respect
   of its Indebtedness or the Indebtedness of any such Subsidiary.


                                 ARTICLE VI

                                 COVENANTS

         During the term of this Agreement, unless the Required
   Lenders shall otherwise consent in writing:

         6.1. Financial Reporting.2   The Borrower will maintain,
   for itself and each Subsidiary, a system of accounting established
   and administered in accordance with generally accepted accounting
   principles, and furnish to the Lenders:

            (i)    Within 100 days after the close of each of its fiscal
                   years, an unqualified (except for qualifications
                   relating to changes in accounting principles or
                   practices reflecting changes in generally accepted
                   accounting principles and required or approved by the
                   Borrower's independent certified public accountants)
                   audit report certified by independent certified public
                   accountants acceptable to the Required Lenders,
                   prepared in accordance with Agreement Accounting
                   Principles on a consolidated basis for itself and its
                   Subsidiaries, including balance sheets as of the end of
                   such period, related profit and loss and reconciliation
                   of surplus statements, and a statement of cash flows.

            (ii)   Within 60 days after the close of the first three
                   quarterly periods of each of its fiscal years, for
                   itself and its Subsidiaries, consolidated unaudited
                   balance sheets as at the close of each such period and
                   consolidated profit and loss and reconciliation of
                   surplus statements and a statement of cash flows for
                   the period from the beginning of such fiscal year to
                   the end of such quarter, all certified by its chief
                   financial officer.

            (iii)  As soon as available, but in any event within 90
                   days after the beginning of each fiscal year of the
                   Borrower, a copy of the plan and forecast (including a
                   projected consolidated balance sheet, income statement
                   and funds flow statement) of the Borrower and its
                   Subsidiaries for such fiscal year.

            (iv)   Together with the financial statements required under
                   Sections 6.1(i) and (ii), a compliance certificate in
                   substantially the form of Exhibit A signed by its Chief
                   Financial Officer or Treasurer showing the calculations
                   necessary to determine compliance with this Agreement
                   and stating that no Default or Unmatured Default

                                     47
   <PAGE>

                   exists, or if any Default or Unmatured Default exists,
                   stating the nature and status thereof.

            (v)    Within 270 days after the close of each fiscal year, a
                   statement of the Unfunded Liabilities of each Single
                   Employer Plan, certified as correct by an actuary
                   enrolled under ERISA.

            (vi)   As soon as possible and in any event within 20 days
                   after the Borrower knows that any Reportable Event has
                   occurred with respect to any Plan, a statement, signed
                   by the chief financial officer of the Borrower,
                   describing said Reportable Event and the action which
                   the Borrower proposes to take with respect thereto.

            (vii)  As soon as possible and in any event within 20
                   days after receipt by the Borrower, a copy of (a) any
                   notice or claim to the effect that the Borrower or any
                   of its Subsidiaries is or may be liable to any Person
                   as a result of the release by the Borrower, any of its
                   Subsidiaries, or any other Person of any toxic or
                   hazardous waste or substance into the environment, and
                   (b) any notice alleging any violation of any federal,
                   state or local environmental, health or safety law or
                   regulation by the Borrower or any of its Subsidiaries,
                   which, in either case, could reasonably be expected to
                   have a Material Adverse Effect.

            (viii) Promptly upon the furnishing thereof to the
                   shareholders of the Borrower, copies of all financial
                   statements, reports and proxy statements so furnished.

            (ix)   Promptly upon the filing thereof, copies of all
                   registration statements and annual, quarterly, monthly
                   or other regular reports which the Borrower or any of
                   its Subsidiaries files with the Securities and Exchange
                   Commission.

            (x)    Such other information (including non-financial
                   information) as the Agent or any Lender may from time
                   to time reasonably request.

         6.2.  Use of Proceeds.  The Borrower will, and will cause each
   Subsidiary to, use the proceeds of the Advances to pay the purchase price
   and related costs and expenses of the PSD Acquisition, to refinance
   existing Indebtedness of the Acquired Business, to repay loans
   outstanding under the Existing Credit Agreement, for working capital
   and for other general corporate purposes; provided, however, that on the
   Closing Date, after giving effect to all Revolving Loans to be
   made on the Closing Date and the Existing Letters of Credit, the
   unused portion of the Aggregate Commitment shall not be less than
   $15,000,000. The Borrower will not, nor will it permit any
   Subsidiary to, use any of the proceeds of the Advances to
   purchase or carry any "margin stock" (as defined in Regulation U).

         6.3.  Notice of Default.  The Borrower will give prompt notice
   in writing to the Lenders of the occurrence of any Default or Unmatured

                                     48
   <PAGE>

   Default and of any other development, financial or otherwise (including,
   without limitation, developments with respect to Year 2000 Issues), which
   could reasonably be expected to have a Material Adverse Effect.

         6.4.  Conduct of Business.  The Borrower will, and will cause
   each Subsidiary to, carry on and conduct its business only in fields
   of enterprise substantially the same as or reasonably related to the
   fields of enterprise in which it is presently conducted (after giving
   effect to the PSD Acquisition) and do all things necessary to
   remain duly incorporated or organized, validly existing and (to
   the extent such concept applies to such entity) in good standing
   as a domestic corporation, partnership or limited liability
   company in its jurisdiction of incorporation or organization, as
   the case may be, and maintain all requisite authority to conduct
   its business in each jurisdiction in which its business is
   conducted, in each case, except to the extent that a failure to
   do so could not reasonably be expected to have a Material Adverse
   Effect.

         6.5.  Taxes.   The Borrower will, and will cause each Subsidiary
   to, timely file complete and correct United States federal, if applicable,
   and applicable foreign, state and local tax returns required by law and
   pay when due all taxes, assessments and governmental charges and levies
   upon it or its income, profits or Property which if unpaid might
   become a Lien on any of the Collateral, except those which are
   being contested in good faith by appropriate proceedings and with
   respect to which adequate reserves have been set aside if and to
   the extent required by Agreement Accounting Principles.

         6.6.  Insurance; Insurance and Condemnation Proceeds.  (a)
   The Borrower shall maintain for itself and its Domestic
   Subsidiaries, or shall cause each of its Domestic Subsidiaries to
   maintain, in full force and effect the insurance policies and
   programs listed on Schedule 5.22 or substantially similar
   policies and programs or other policies and programs as reflect
   coverage that is reasonably consistent with prudent industry
   practice.  The Borrower shall deliver to the Agent (i)
   endorsements to all "All Risk" physical damage insurance policies
   on all of the Borrower's and the Guarantors' tangible real and
   personal property and assets and business interruption insurance
   policies naming the Agent loss payee, and (ii) certificates as to
   all general liability and other liability policies naming the
   Agent an additional insured.  In the event the Borrower or any of
   its Domestic Subsidiaries, at any time or times hereafter shall
   fail to obtain or maintain any of the policies or insurance
   required herein or to pay any premium in whole or in part
   relating thereto within ten days after written notice from the
   Agent, then the Agent, without waiving or releasing any
   obligations or resulting Default hereunder, may at any time or
   times thereafter so long as such failure shall continue (but
   shall be under no obligation to do so) obtain and maintain such
   policies of insurance and pay such premiums and take any other
   action with respect thereto which the Agent deems advisable.  All
   sums so disbursed by the Agent shall constitute part of the
   Obligations, payable as provided in this Agreement.

            (b)  The Borrower shall direct (and, if applicable,
   shall cause any Guarantor to direct) all insurers under policies
   of property damage, machinery and business interruption insurance
   and payors of any condemnation claim or award relating to the
   property to pay all proceeds payable under such policies or with
   respect to such claim or award for any loss with respect to the
   Collateral directly to the Agent, for the benefit of the Agent
   and the Holders of the Secured Obligations; provided that if such

                                     49
   <PAGE>

   proceeds or award is less than $5,000,000 ("Excluded Proceeds"),
   unless a Default shall have occurred and be continuing, the Agent
   shall remit such Excluded Proceeds to the Borrower.  Each such
   policy shall contain a long-form loss-payable endorsement naming
   the Agent as loss payee, which endorsement shall be in form and
   substance acceptable to the Agent.  The Agent shall, upon receipt
   of such proceeds (other than Excluded Proceeds) and at the
   Borrower's direction, either apply the same to the principal
   amount of the Revolving Loans outstanding at the time of such
   receipt and create a corresponding reserve against the Aggregate
   Commitment in an amount equal to such application (the "Decision
   Reserve") or hold them as cash collateral for the Obligations in
   an interest bearing account.  For up to one hundred eighty days
   from the date of any loss (the "Decision Period"), the Borrower
   may notify the Agent that it intends to restore, rebuild or
   replace the property subject to any insurance payment or
   condemnation award and shall, as soon as practicable thereafter,
   provide the Agent detailed information, including a construction
   schedule and cost estimates.  Should a Default occur and be
   continuing during the Decision Period, should the Borrower notify
   the Agent during the Decision Period that it has decided not to
   rebuild or replace such property, or should the Borrower fail to
   notify the Agent of the Borrower's decision during the Decision
   Period, then the amounts held as cash collateral pursuant to this
   Section 6.6 or as the Decision Reserve shall upon the Required
   Lenders' direction be applied as a mandatory prepayment of the
   Term Loans pursuant to Section 2.7.2(a).  Proceeds held as cash
   collateral pursuant to this Section 6.6 or as the Decision
   Reserve shall be disbursed as payments for restoration,
   rebuilding or replacement of such property become due; provided,
   however, should a Default occur and be continuing after the
   Borrower has notified the Agent that it intends to rebuild or
   replace the property, the Decision Reserve or amounts held as
   cash collateral may, or shall, upon the Required Lenders'
   direction, be applied as a mandatory prepayment of the Term Loans
   pursuant to Section 2.7.2(a).  In the event the Decision Reserve
   is to be applied as a mandatory prepayment of the Term Loans, the
   Borrower shall be deemed to have requested an Advance of
   Revolving Loans in an amount equal to the Decision Reserve, and
   such Advance shall be made as a Floating Rate Advance regardless
   of any failure of the Borrower to meet the conditions precedent
   set forth in Article IV.  Upon completion of the restoration,
   rebuilding or replacement of such property, the unused proceeds
   shall constitute Net Cash Proceeds of an Asset Sale and shall be
   applied as a mandatory prepayment of the Term Loans pursuant to
   Section 2.7.2(a).

         6.7.  Compliance with Laws.  The Borrower will, and will
   cause each Subsidiary to, comply with all laws, rules, regulations,
   orders, writs, judgments, injunctions, decrees or awards to which
   it may be subject including, without limitation, all Environmental
   Laws, the violation of which could reasonably be expected to have a
   Material Adverse Effect and/or result in the creation of any Lien
   not permitted by Section 6.15.

         6.8.  Maintenance of Properties.  The Borrower will, and will
   cause each Subsidiary to, do all things necessary and commercially
   reasonable to maintain, preserve, protect and keep its Property
   in good repair, working order and condition, ordinary wear and
   tear excepted, and make all necessary and proper repairs,
   renewals and replacements so that its business carried on in
   connection therewith may be properly conducted at all times, in
   each case except to the extent that a failure to do so could not
   reasonably be expected to have a Material Adverse Effect.

                                     50
   <PAGE>


         6.9.  Inspection.   The Borrower will, and will cause each
   Subsidiary to, permit the Agent and the Lenders, by their respective
   representatives and agents, to inspect any of the Property, books
   and financial records of the Borrower and each Subsidiary, to examine
   and make copies of the books of accounts and other financial records of
   the Borrower and each Subsidiary, and to discuss the affairs,
   finances and accounts of the Borrower and each Subsidiary with,
   and to be advised as to the same by, their respective officers,
   in each case upon reasonable advance notice and at such
   reasonable times (during normal business hours) and intervals as
   the Agent may designate.  In addition, during the continuance of
   any Default, the Agent or any Lender may, at their sole cost and
   expense, retain an outside environmental consulting firm for the
   purpose of conducting a Phase I environmental site assessment,
   and any follow-up investigation reasonably suggested by such
   assessment, of any of the Property, upon reasonable advance
   notice and at reasonable times and intervals as the Agent may
   designate.

         6.10.  Dividends.  The Borrower will not, nor will it permit
   any Subsidiary to, declare or pay any dividends or make any distributions
   on its capital stock (other than dividends payable in its own capital
   stock) or redeem, repurchase or otherwise acquire or retire any of its
   Equity Interests at any time outstanding, except that any
   Subsidiary may declare and pay dividends or make distributions to
   the Borrower or to a Wholly-Owned Subsidiary and excluding share
   repurchases of the Borrower's capital stock used solely to fund
   employee stock purchase plans and employee stock option plans,
   provided such share repurchases do not exceed $5,000,000 in the
   aggregate in any fiscal year (including, without limitation, the
   fiscal year ending December 31, 1999).

         6.11.  Indebtedness.   The Borrower will not, nor will it
   permit any Subsidiary to, create, incur or suffer to exist any
   Indebtedness, except:

            (i)    The Loans and Reimbursement Obligations.

            (ii)   Indebtedness (other than Indebtedness of Foreign
                   Subsidiaries) existing on the date hereof and described
                   in Schedule 6.11.

            (iii)  Indebtedness arising under Rate Management Transactions
                   and other Financial Contracts permitted by Section
                   6.25.

            (iv)   The Subordinated Indebtedness.

            (v)    Indebtedness of Foreign Subsidiaries not exceeding
                   $30,000,000 (or equivalent in foreign currencies) in
                   aggregate principal amount at any one time outstanding
                   prior to December 31, 1999 and $25,000,000 (or
                   equivalent in foreign currencies) in aggregate
                   principal amount at any one time outstanding on or
                   after December 31, 1999.

            (vi)   Factoring of accounts and notes receivable of
                   Foreign Subsidiaries, provided that (A) such
                   receivables sold without recourse to the selling

                                     51
   <PAGE>

                   Foreign Subsidiary shall be sold on commercially
                   reasonable terms and (B) the liabilities of such
                   Foreign Subsidiaries with respect to such receivables
                   sold with recourse to the selling Foreign Subsidiary
                   shall not exceed $10,000,000 (or equivalent in foreign
                   currencies) in the aggregate outstanding at any time.

            (vii)  Indebtedness constituting Contingent
                   Obligations permitted by Section 6.24.

            (viii) Indebtedness incurred pursuant to so-called
                   "synthetic lease" transactions ("Synthetic Leases") and
                   Sale and Leaseback Transactions, provided that at the
                   time such transaction is entered into (A) no Default or
                   Unmatured Default exists and (B) the Leverage Ratio as
                   of the last day of the most recent fiscal quarter for
                   which the Borrower has delivered financial statements
                   pursuant to Section 6.1 on a pro forma basis as if such
                   Synthetic Lease or Sale and Leaseback Transaction were
                   entered into at the beginning of the four-fiscal
                   quarter period ending on such day would have been equal
                   to or less than 3.00 to 1.

            (ix)   Indebtedness of the Borrower to any Subsidiary or of
                   any Guarantor to the Borrower or any other Guarantor or
                   of any Subsidiary that is not a Guarantor to any other
                   Subsidiary that is not a Guarantor; provided that if
                   the Borrower or any Guarantor is the obligor on such
                   Indebtedness, such Indebtedness shall be expressly
                   subordinate to the payment in full of the Secured
                   Obligations in a manner satisfactory in form and
                   substance to the Agent.

            (x)    Other Indebtedness, not otherwise permitted by clauses
                   (i) through (ix) above, not exceeding $15,000,000 in
                   the aggregate outstanding at any one time.

         6.12.  Merger.   The Borrower will not, nor will it permit any
   Subsidiary to, merge or consolidate with or into any other Person, except
   that a Subsidiary may merge (i) into the Borrower or a Wholly-Owned
   Subsidiary or (ii) in connection with a Permitted Acquisition.

         6.13.  Sale of Assets.  The Borrower will not, nor will it permit
   any Subsidiary to, lease, sell or otherwise dispose of its Property to
   any other Person, except:

            (i)    Sales of inventory in the ordinary course of business.

            (ii)   Sales by Foreign Subsidiaries of accounts receivable
                   and notes receivable permitted by Section 6.11(vi).

            (iii)  Sales or other dispositions of Property
                   in connection with Synthetic Leases and Sale and
                   Leaseback Transactions permitted by Section 6.11(viii).

            (iv)   Equipment or other assets traded in or exchanged for
                   replacement assets.

                                     52
   <PAGE>


            (v)    Leases, sales or other dispositions of its Property
                   (excluding leases, sales or other dispositions
                   permitted under clauses (i) through (iv) above) that,
                   together with all other Property of the Borrower and
                   its Subsidiaries previously leased, sold or disposed of
                   as permitted by this clause (v) during the four-fiscal
                   quarter period ending with the fiscal quarter in which
                   any such lease, sale or other disposition occurs, do
                   not constitute a Substantial Portion of the Property of
                   the Borrower and its Subsidiaries, provided that during
                   the continuance of a Default or Unmatured Default, any
                   disposition of Collateral pursuant to this clause (v)
                   shall be for consideration consisting only of cash and
                   Cash Equivalent Investments.

         6.14.  Investments and Acquisitions.   The Borrower will not,
   nor will it permit any Subsidiary to, make or suffer to exist any
   Investments (including without limitation, loans and advances to,
   and other Investments in, Subsidiaries), or commitments therefor,
   or to create any Subsidiary or to become or remain a partner in
   any partnership or joint venture, or to make any Acquisition of
   any Person, except:

            (i)    Cash Equivalent Investments.

            (ii)   Existing Investments in Subsidiaries and other
                   Investments in existence on the date hereof and
                   described in Schedule 6.14.

            (iii)  Investments by the Borrower or any Guarantor in
                   Subsidiaries other than Guarantors, in addition to
                   Investments permitted by clause (ii) above not to
                   exceed in the aggregate during the term of this
                   Agreement the sum of (A) $15,000,000 (or equivalent in
                   foreign currencies) plus (B) the cumulative amount of
                   repayments of principal, returns of capital and
                   dividends received by the Borrower or any Guarantor
                   from Subsidiaries other than Guarantors on Investments
                   (including existing Investments) in such Subsidiaries.

            (iv)   Investments in the Borrower and in
                   Subsidiaries that are Guarantors, and Investments by
                   Subsidiaries that are not Guarantors in other
                   Subsidiaries that are not Guarantors.

            (v)    Permitted Acquisitions and Investments in joint
                   ventures, provided that no Default or Unmatured Default
                   exists before or after giving effect to such Permitted
                   Acquisition or such joint venture Investment.

            (vi)   Investments constituting Rate Management
                   Transactions and Financial Contracts permitted by
                   Section 6.25.

            (vii)  Other Investments not otherwise
                   permitted by clauses (i) through (vi) above, not
                   exceeding in the aggregate during the term of this
                   Agreement the sum of (A) $10,000,000 plus (B) the
                   cumulative amount of repayments of principal, returns
                   of capital and dividends received by the Borrower or

                                     53
   <PAGE>

                   any Guarantor on Investments made pursuant to this
                   clause (vii).

         6.15.  Liens.  The Borrower will not, nor will it permit any
   Subsidiary to, create, incur, or suffer to exist any Lien in, of or on
   the Property of the Borrower or any of its Subsidiaries, except:

            (i)    Liens for taxes, assessments or governmental charges
                   (other than Liens imposed by the PBGC) or levies on its
                   Property if the same shall not at the time be
                   delinquent or thereafter can be paid without penalty,
                   or are being contested in good faith and by appropriate
                   proceedings and for which adequate reserves shall have
                   been set aside on its books if and to the extent
                   required by Agreement Accounting Principles.

            (ii)   Liens imposed by law, such as carriers', warehousemen's
                   and mechanics' liens and other similar liens arising in
                   the ordinary course of business which secure payment of
                   obligations not more than 60 days past due or which are
                   being contested in good faith by appropriate
                   proceedings and for which adequate reserves shall have
                   been set aside on its books if and to the extent
                   required by Agreement Accounting Principles.

            (iii)  Liens arising out of pledges or deposits under worker's
                   compensation laws, unemployment insurance, old age
                   pensions, or other social security or retirement
                   benefits, or similar legislation.

            (iv)   Utility easements, building restrictions and such other
                   encumbrances or charges against real property as are of
                   a nature generally existing with respect to properties
                   of a similar character and which do not in any material
                   way affect the marketability of the same or interfere
                   with the use thereof in the business of the Borrower or
                   its Subsidiaries.

            (v)    Liens granted to or for the benefit of the Agent, the
                   Lenders and/or the Holders of Secured Obligations
                   pursuant to any Loan Document or Rate Management
                   Transaction.

            (vi)   Liens on property of Foreign Subsidiaries in connection
                   with banker's acceptances with maturities not in excess
                   of 180 days.

            (vii)  Liens on accounts and notes receivable of Foreign
                   Subsidiaries securing loans and advances to Foreign
                   Subsidiaries permitted by Section 6.11.

            (viii) Liens against equipment, property, or plant leased by
                   the Borrower or any Subsidiary in favor of the lessor
                   thereof.

            (ix)   Purchase money Liens to secure Indebtedness permitted
                   hereunder, and extensions, renewals and refinancing
                   thereof so long as the principal amounts thereof are
                   not increased.

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   <PAGE>

            (x)    Liens to secure the performance of tenders, statutory
                   obligations, bids, leases, government contracts,
                   performance and surety bonds and other similar
                   obligations in the ordinary course of business.

            (xi)   Liens on documents and related property arising in
                   connection with trade letters of credit in the ordinary
                   course of business.

            (xii)  Liens (excluding liens permitted under clauses (i)
                   through (xi) above) existing on the date hereof, the
                   aggregate amount of liabilities secured by which does
                   not exceed $5,000,000.  All such Liens securing
                   liabilities in excess of $250,000 are listed on
                   Schedule 6.15 hereto.

            (xiii) Liens (excluding liens permitted under clauses (i)
                   through (xii) above) to secure obligations of the
                   Borrower or any Subsidiary, the principal amount of
                   which does not exceed $15,000,000 at any one time.

         6.16.  Capital Expenditures.  The Borrower will not, nor will
   it permit any Subsidiary to, expend, or be committed to expend, in
   excess of $40,000,000 for Capital Expenditures during any one fiscal
   year, commencing with fiscal year 1999, in the aggregate for the
   Borrower and its Subsidiaries on a consolidated basis; provided,
   however, that for each fiscal year after 1999, such aggregate
   amount shall be increased by an amount (the "Carryover Amount")
   that is the lesser of (i) the excess, if any, of (A) the maximum
   aggregate amount of Capital Expenditures (including any Carryover
   Amount) permitted pursuant to this Section 6.16 for the
   immediately preceding fiscal year over (B) the aggregate amount
   of actual Capital Expenditures during such preceding fiscal year
   and (ii) $40,000,000.  Notwithstanding the foregoing and in
   addition thereto, the Borrower and its Subsidiaries may make
   Capital Expenditures (1) in an amount equal to Available Net Cash
   Proceeds in accordance with Section 2.7.2(a) and (2) in an amount
   equal to Excess Cash Flow on a cumulative basis to the extent not
   required to be applied as a mandatory prepayment pursuant to
   Section 2.7.2(c).

         6.17.  Limitation on Negative Pledge Clauses and Payment
   Restrictions Affecting Subsidiaries  (a)  The Borrower shall not
   (and shall not suffer or permit any of its Domestic Subsidiaries to),
   directly or indirectly, enter into any agreement with any Person which
   prohibits or limits the ability of any of the Borrower or any of
   its Domestic Subsidiaries to create, incur, assume or suffer to
   exist any Lien upon any of its property, assets or revenues,
   whether now owned or hereafter acquired, to secure the Secured
   Obligations, other than (i) the agreements evidencing or
   governing Subordinated Indebtedness, (ii) Lien restrictions in a
   Capitalized Lease or other purchase money financing arrangement
   permitted hereunder relating to the asset financed thereunder and
   (iii) purchase agreements, license agreements, leases and other
   similar agreements entered into in the ordinary course of
   business that prohibit a Lien on the asset or assets subject to
   such agreements.

         (b)  The Borrower shall not, and shall not permit any of its
   Subsidiaries to, directly or indirectly, create, assume or suffer
   to exist any consensual restriction on the ability of any of its
   Subsidiaries to pay dividends or make other distributions to or
   on behalf of, or to pay any obligation to or on behalf of, or

                                     55
   <PAGE>

   otherwise to transfer assets or property to or on behalf of, or
   make or pay loans or advances to or on behalf of, the Borrower or
   any of its Subsidiaries, except

            (1)  restrictions imposed by the agreements and instruments
   governing or evidencing the Subordinated Indebtedness,

            (2)  restrictions imposed by applicable law,

            (3)  existing restrictions under Indebtedness of any
   Subsidiary outstanding on the Closing Date (after giving effect
   to the PSD Acquisition),

            (4)  restrictions under any Acquired Indebtedness not
   incurred in violation of any agreement (including any Equity
   Interest) relating to any property, asset, or business acquired
   by the Borrower or any of its Subsidiaries, which restrictions in
   each case existed at the time of acquisition, were not put in
   place in connection with or in anticipation of such acquisition
   and are not applicable to any Person, other than the Person
   acquired, or to any property, asset or business, other than the
   property, assets and business so acquired,

            (5)  restrictions with respect solely to any of its
   Subsidiaries imposed pursuant to a binding agreement which has
   been entered into for the sale or disposition of all or
   substantially all of the Equity Interests or assets of such
   Subsidiary; provided, that such restrictions apply solely to the
   Equity Interests or assets of such Subsidiary which are being
   sold,

            (6)  restrictions on transfer contained in purchase money
   Indebtedness; provided, that such restrictions relate only to the
   transfer of the property acquired with the proceeds of such
   purchase money Indebtedness,

            (7)  provisions with respect to the disposition or
   distribution of assets or property in joint venture agreements,
   asset sale agreements, stock sale agreements and other similar
   agreements entered into in the ordinary course of business,

            (8)  restrictions on cash or other deposits or net worth
   imposed by customers under contracts entered into in the ordinary
   course of business,

            (9)  in connection with and pursuant to permitted
   refinancings, replacements of restrictions imposed pursuant to
   clauses (3), (4) or (6) or this clause (9) of this Section
   6.17(b) that are not more restrictive taken as a whole than those
   being replaced and do not apply to any other Person or assets
   than those that would have been covered by the restrictions in
   the Indebtedness so refinanced, and

            (10)  restrictions contained in Indebtedness incurred by a
   Foreign Subsidiary in accordance with this Agreement; provided,
   that such restrictions relate only to one or more Foreign
   Subsidiaries.

            Notwithstanding the foregoing, (A) customary provisions
   restricting subletting or assignment of any lease entered into in

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   <PAGE>

   the ordinary course of business, consistent with industry
   practice and (B) any asset subject to a Lien which is not
   prohibited to exist with respect to such asset pursuant to the
   terms of this Agreement may be subject to customary restrictions
   on the transfer or disposition thereof pursuant to such Lien.

         6.18.  Year 2000.  The Borrower will take and will cause each
   of its Subsidiaries to take all such actions as are reasonably
   necessary to successfully implement the Year 2000 Program and to
   assure that Year 2000 Issues will not have a Material Adverse Effect.
   At the request of the Agent, the Borrower will provide a description
   of the Year 2000 Program, together with any updates or progress
   reports with respect thereto.

         6.19.  Affiliates.  The Borrower will not, and will not permit
   any Subsidiary to, enter into any transaction (including, without
   limitation, the purchase or sale of any Property or service) with,
   or make any payment or transfer to, any Affiliate (other than the
   Borrower and its Wholly-Owned Subsidiaries) except in the ordinary
   course of business and pursuant to the reasonable requirements of the
   Borrower's or such Subsidiary's business and upon fair and
   reasonable terms no less favorable to the Borrower or such
   Subsidiary than the Borrower or such Subsidiary would obtain in a
   comparable arms-length transaction.

         6.20.  Unfunded Liabilities.  Except as could not reasonably
   be expected, individually or in the aggregate, to have a Material
   Adverse Effect, the Borrower will not permit any Unfunded Liabilities
   to exist under any Plan.

         6.21.  Subordinated Indebtedness.  The Borrower will not,
   and will not permit any Subsidiary to, make any amendment or
   modification to the indenture, note or other agreement evidencing
   or governing any Subordinated Indebtedness which is adverse to
   the interests of the Lenders, or directly or indirectly
   voluntarily prepay, defease or in substance defease, purchase,
   redeem, retire or otherwise acquire, any Subordinated
   Indebtedness, other than (i) in connection with the incurrence or
   issuance of the Rollover Bridge Notes and/or the Exchange Notes
   (as such terms are defined in the Bridge Loan Agreement) pursuant
   to the Bridge Loan Agreement, (ii) the refinancing of the Bridge
   Loan with proceeds of Permitted Subordinated Indebtedness or
   Equity Interests issued by the Borrower and (iii) after the
   issuance of Permitted Subordinated Indebtedness, the exchange of
   notes evidencing such Indebtedness for notes that have terms
   substantially identical in all material respects to such original
   notes, except that such new notes do not contain terms with
   respect to transfer restrictions.  No Subordinated Indebtedness
   shall bear interest required to be paid in cash at a rate in
   excess of 14% per annum.  The Borrower shall exercise any option
   that permits it to capitalize interest on Subordinated
   Indebtedness in excess of 14% per annum.  The Borrower shall give
   the Agent five Business Days' prior written notice of the terms
   of any amendment or modification to the indenture, note or other
   agreement evidencing or governing any Subordinated Indebtedness.

         6.22.  Required Rate Management Transactions.  Subject to
   the next sentence, from and after the date which is 90 days after
   the Closing Date, the Borrower will maintain one or more Rate
   Management Transactions with one or more financial institutions

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   <PAGE>

   acceptable to the Agent in its reasonable discretion, providing
   for interest rate protection on a notional amount equal to 50%
   of the aggregate outstanding amount of the Term Loans and the
   Subordinated Indebtedness for a period of at least three years
   from the Closing Date.  It is agreed that the incurrence of the
   Bridge Loan at a rate of interest capped with respect to cash
   interest and/or the issuance of the Permitted Subordinated
   Indebtedness at a fixed rate of interest shall be deemed to provide
   such protection to the extent of the outstanding principal amount
   thereof.

         6.23.  Sale and Leaseback Transactions.  The Borrower will not,
   nor will it permit any Subsidiary to, enter into or suffer to exist
   any Sale and Leaseback Transaction other than Sale and Leaseback
   Transactions and Synthetic Leases permitted by Section
   6.11(viii).

         6.24.  Contingent Obligations.  The Borrower will not, nor will
   it permit any Subsidiary to, make or suffer to exist any Contingent
   Obligation (including, without limitation, any Contingent
   Obligation with respect to the obligations of a Subsidiary),
   except (i) by endorsement of instruments for deposit or
   collection in the ordinary course of business, (ii) guaranties of
   Indebtedness permitted by Section 6.11, provided that only
   Guarantors shall guarantee Subordinated Indebtedness, (iii)
   guaranties by the Borrower or any Subsidiary of employee credit
   card obligations in the ordinary course of business, (iv)
   recourse obligations in connection with the factoring of accounts
   and notes receivable of Foreign Subsidiaries,  (v) guaranties and
   other Contingent Obligations of the Borrower or any Subsidiary
   with respect to obligations of any Subsidiary and (vi) other
   Contingent Obligations not otherwise permitted by clauses (i)
   through (v) above not exceeding $2,000,000 in the aggregate
   outstanding at any one time.

         6.25.  Financial Contracts.  The Borrower will not, nor will
   it permit any Subsidiary to, enter into or remain liable upon any
   Financial Contract, except (i) Rate Management Transactions required
   under Section 6.22 and (ii) other Financial Contracts pursuant to
   which the Borrower or any Subsidiary has hedged its reasonably estimated
   interest rate, foreign currency or commodity exposure.

         6.26.  Financial Covenants.

                6.26.1.  Interest Coverage Ratio.  The Borrower
         will not permit the ratio, determined as of the end of each
         of its fiscal quarters for the then most-recently ended
         four fiscal quarters, of (i) Consolidated EBITDA to (ii)
         Consolidated Interest Expense to be less than 3.00 to 1
         for each fiscal quarter ending on or prior to June 30, 2000;
         3.25 to 1 for each fiscal quarter ending after June 30, 2000
         and on or prior to December 31, 2000; 3.75 to 1 for each fiscal
         quarter ending after December 31, 2000 and on or prior to
         December 31, 2001; and 4.00 to 1 for each fiscal quarter
         ending after December 31, 2001.

               6.26.2.  Fixed Charge Coverage Ratio.  The Borrower will
         not permit the ratio, determined as of the end of each of its
         fiscal quarters for the then most-recently ended four fiscal
         quarters, of (i) Consolidated EBITDA minus Consolidated
         Capital Expenditures to (ii) Consolidated Interest Expense,
         plus (without duplication) scheduled maturities of principal
         of Consolidated Funded Indebtedness during such four fiscal

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   <PAGE>

         quarter period, plus expense for taxes paid or accrued, all
         calculated for the Borrower and its Subsidiaries on a
         consolidated basis, to be less than 1.15 to 1 for each
         fiscal quarter ending on or prior to December 31, 2000; and
         1.25 to 1 for each fiscal quarter ending thereafter.

               6.26.3.  Leverage Ratio.  The Borrower will not permit
         the ratio, determined as of the end of each of its fiscal
         quarters, of (i) Consolidated Funded Indebtedness to (ii)
         Consolidated EBITDA for the then most-recently ended four fiscal
         quarters to be greater than: 4.75 to 1 for each fiscal quarter
         ending on or prior to March 31, 2000; 4.25 to 1 for each fiscal
         quarter ending after March 31, 2000 and on or prior to December 31,
         2000; 3.50 to 1 for each fiscal quarter ending after
         December 31, 2000 and on or prior to December 31, 2001; and
         3.00 to 1 for each fiscal quarter ending after December 31,
         2001.

               6.26.4.  Senior Leverage Ratio.  The Borrower will not
         permit the ratio, determined as of the end of each of its
         fiscal quarters, of (i) Consolidated Funded Indebtedness  minus
         Subordinated Indebtedness to (ii) Consolidated EBITDA for
         the then most-recently ended four fiscal quarters to be
         greater than 3.50 to 1 for each fiscal quarter ending on or
         prior to March 31, 2000; 3.00 to 1 for each fiscal quarter
         ending after March 31, 2000 and on or prior to December 31,
         2000; and 2.50 to 1 for each fiscal quarter ending after
         December 31, 2000.

               6.26.5.  Minimum Net Worth.  The Borrower will at
         all times maintain Consolidated Net Worth of not less than
         the sum of (i) $185,000,000 plus (ii) 75% of Consolidated Net
         Income earned in each fiscal quarter beginning with the quarter
         ending December 31, 1999 (without deduction for losses) plus (iii)
         the amount of any addition to the consolidated stockholders'
         equity of the Borrower and its Subsidiaries at any time
         resulting from the issuance or sale of any Equity Interests
         by the Borrower after the date of this Agreement.

               6.26.6.  Pro Forma Calculation.  In the event that the
         Borrower or any Subsidiary shall have consummated a Permitted
         Acquisition or Investment in a joint venture during any four
         fiscal quarter period for which any financial covenant contained
         in this Section 6.26 is calculated, such financial covenant
         shall be calculated as if such Permitted Acquisition or Investment
         (including any Indebtedness incurred in connection
         therewith) had been consummated on the first day of such
         four fiscal quarter period, provided that the Borrower shall
         not include such Permitted Acquisition or Investment in the
         calculation of Consolidated EBITDA, unless the Borrower
         shall have delivered to the Lenders, at or prior to the time
         financial statements as of the last day of such four fiscal
         quarter period are delivered to the Lenders pursuant to
         Section 6.1, audited financial statements of the acquired
         business or Person or joint venture, as the case may be,
         stated in Dollars and presented in conformity with U.S.
         generally accepted accounting principles, and covering the
         period from the first day of such four fiscal quarter period
         to the actual date of the consummation of such Permitted
         Acquisition.

         6.27.  Fiscal Year.  The Borrower shall not, and shall not
   permit any Subsidiary to, change the fiscal year of the Borrower
   or any Subsidiary.

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   <PAGE>

         6.28.  Guarantors; Pledges of Stock of Foreign Subsidiaries.
   (a)  If at any time on or after the Closing Date, any one or more
   Domestic Subsidiaries shall constitute a Material Domestic Subsidiary,
   the Borrower shall promptly notify the Agent thereof, which notice
   shall specify the date as of which such Domestic Subsidiary or
   Subsidiaries became a Material Domestic Subsidiary.  (Each reference
   hereafter in this Section 6.28 to a Material Domestic Subsidiary
   shall mean each Subsidiary constituting such Material Domestic
   Subsidiary.)  Within 90 days after the date specified in such notice,
   the Borrower shall (i) cause such Material Domestic Subsidiary to
   execute and deliver to the Agent a Guaranty and such Collateral
   Documents with respect to substantially all of the Property of
   such Material Domestic Subsidiary as the Agent shall reasonably
   request (all such Collateral Documents to be substantially similar
   to corresponding Collateral Documents executed by the Borrower and
   otherwise in form and substance reasonably satisfactory to the
   Agent) and (ii) pledge to the Agent, for the benefit of the Holders
   of Secured Obligations, all of the Equity Interests of such Material
   Domestic Subsidiary held by the Borrower, in each case together
   with such supporting documentation, including authorizing
   resolutions and/or opinions of counsel, as the Agent may
   reasonably request.  Notwithstanding the foregoing (A) if the
   Borrower acquires a Material Domestic Subsidiary pursuant to a
   Permitted Acquisition, the Borrower may, as an alternative to
   complying with the preceding sentence, within 90 days after the
   consummation of such Permitted Acquisition, cause such Material
   Domestic Subsidiary to merge into, or to transfer all or
   substantially all of its assets to, the Borrower or a Guarantor,
   and (B) the Borrower shall comply with the preceding sentence or,
   in the alternative, the preceding clause (A), with respect to
   Sanofi Diagnostics Pasteur, Inc. and Genetic Systems within 180
   days after the Closing Date.

            (b)  If at any time on or after the Closing Date, any
   Foreign Subsidiary, the Equity Interests of which are held by the
   Borrower and/or any Guarantor, shall have net assets (at book
   value) of $10,000,000 (or the equivalent in any foreign currency)
   or more, within 90 days after the Agent shall so request, the
   Borrower shall, or shall cause such Guarantor to, pledge 65% of
   such Equity Interests to the Agent, for the benefit of Holders of
   Secured Obligations, pursuant to a pledge agreement, together
   with an opinion of counsel from the jurisdiction of organization
   of such Foreign Subsidiary (which may be the Borrower's or such
   Foreign Subsidiary's internal counsel, if qualified in such
   jurisdiction), in each case in  form and substance reasonably
   satisfactory to the Agent.

         6.29.  Future Liens on Real Property.  The Borrower shall,
   and shall cause each Guarantor to, execute and deliver to the Agent,
   within 30 days after its acquisition or leasing of any real property
   with a fair market value of $1,000,000 or more after the Closing
   Date, a mortgage, deed of trust, collateral assignment or other
   appropriate instrument evidencing a Lien upon any such acquired
   property, lease or interest, to be in form and substance
   reasonably acceptable to the Agent and subject only to such Liens
   as otherwise shall be permitted by this Agreement, and if
   requested by the Agent a title insurance policy insuring the
   Agent's interest therein.  The foregoing provision shall not
   apply to (a) real property acquired with purchase money financing
   otherwise permitted hereunder, until such purchase money
   financing has been repaid and the purchase money lien released,
   (b) Synthetic Leases and Sale and Leaseback Transactions
   otherwise permitted hereunder or (c) then-existing leases assumed
   or acquired pursuant to a Permitted Acquisition; and the
   foregoing provision shall apply to the leasing of any real
   property only if (i) the term of such lease (without regard to

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   <PAGE>

   any extension thereof at then current market rent) is more than
   five years, (ii) such real property consists of an operating
   plant or (iii) such lease has a material value by reason of a
   purchase option, below-market rent or otherwise.

         6.30.  Surveys of Mortgaged Property.  Within 60 days after
   the Closing Date, the Borrower shall deliver to the Agent ALTA
   surveys covering each parcel of owned real property with respect
   to which the Borrower is delivering a mortgage or deed of trust
   on the Closing Date.  Such surveys shall be sufficient to enable the
   title insurance company to delete the survey exception from each
   title insurance policy delivered to the Agent on the Closing Date
   without reflecting as a result of such survey any exception that
   materially impairs the Borrower's ownership of such property or
   the Borrower's use of such property for its intended purpose.

                                ARTICLE VII

                                 DEFAULTS


         The occurrence of any one or more of the following events
   shall constitute a Default:

         7.1.  Any representation or warranty made or deemed made
   by or on behalf of the Borrower or any of its Subsidiaries to the
   Lenders or the Agent under or in connection with this Agreement,
   any Loan, any Letter of Credit or any certificate or information
   delivered in connection with this Agreement or any other Loan
   Document shall be materially false on the date as of which made.

         7.2.  Nonpayment of principal of any Loan or
   Reimbursement Obligation when due, or nonpayment of interest upon
   any Loan or of any commitment fee or other obligations under any
   of the Loan Documents within five days after the same becomes
   due.

         7.3.  The breach by the Borrower of any of the terms or
   provisions of Section 6.2, 6.10, 6.11, 6.12, 6.13, 6.14, 6.15,
   6.16, 6.17, 6.19, 6.21, 6.23, 6.24, 6.25, 6.26, 6.27, 6.28 or
   6.30; or the breach by the Borrower of any of the terms and
   conditions of Section 6.1, 6.3, 6.6, 6.9 or 6.29 which is not
   remedied within ten days.

         7.4.  The breach by the Borrower (other than a breach
   which constitutes a Default under another Section of this Article
   VII) of any of the terms or provisions of this Agreement or any
   other Loan Document which is not remedied within thirty days
   after written notice from the Agent or the Required Lenders.

         7.5.  (i) Failure of the Borrower or any of its
   Subsidiaries to pay when due any Indebtedness (other than
   Indebtedness owing by the Borrower to any Subsidiary or by any
   Subsidiary to the Borrower or another Subsidiary and other than
   Rate Management Obligations) outstanding in a principal amount
   aggregating in excess of $5,000,000 ("Material Indebtedness"); or

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   <PAGE>

   the default by the Borrower or any of its Subsidiaries in the
   performance (beyond the applicable grace period with respect
   thereto, if any) of any term, provision or condition contained in
   any agreement under which any such Material Indebtedness was
   created or is governed, or any other event shall occur or
   condition exist, the effect of which default or event is to
   cause, or to permit the holder or holders of such Material
   Indebtedness to cause, such Material Indebtedness to become due
   prior to its stated maturity; or any Material Indebtedness of the
   Borrower or any of its Subsidiaries then outstanding in a
   principal amount in excess of $2,500,000 shall be declared to be
   due and payable or required to be prepaid or repurchased (other
   than by a regularly scheduled payment and other than in
   connection with the refinancing of the Bridge Loan with the
   proceeds of Permitted Subordinated Indebtedness) prior to the
   stated maturity thereof; or the Borrower or any of its
   Subsidiaries shall not pay, or shall admit in writing its
   inability to pay, its debts generally as they become due; or (ii)
   the occurrence of an early termination under any Rate Management
   Transaction resulting from (A) any event of default under such
   Rate Management Transaction as to which the Borrower or any
   Subsidiary is the defaulting party or (B) any termination event
   as to which the Borrower or any Subsidiary is an affected party
   and, in either event, the termination value or other similar
   obligation owed by the Borrower or such Subsidiary as a result
   thereof is in excess of $5,000,000 and remains unpaid.

         7.6.  The Borrower or any of its Material Subsidiaries
   shall (i) have an order for relief entered with respect to it
   under the Federal bankruptcy laws as now or hereafter in effect,
   (ii) make an assignment for the benefit of creditors, (iii) apply
   for, seek, consent to, or acquiesce in, the appointment of a
   receiver, custodian, trustee, examiner, liquidator or similar
   official for it or any Substantial Portion of its Property, (iv)
   institute any proceeding seeking an order for relief under the
   Federal bankruptcy laws as now or hereafter in effect or seeking
   to adjudicate it a bankrupt or insolvent, or seeking dissolution,
   winding up, liquidation, reorganization, arrangement, adjustment
   or composition of it or its debts under any law relating to
   bankruptcy, insolvency or reorganization or relief of debtors or
   fail to file (by the deadline for such filing) an answer or other
   pleading denying the material allegations of any such proceeding
   filed against it, (v) take any corporate or partnership action to
   authorize or effect any of the foregoing actions set forth in
   this Section 7.6 or (vi) fail to contest in good faith and in a
   reasonably timely manner any appointment or proceeding described
   in Section 7.7.

         7.7.  Without the application, approval or consent of
   the Borrower or any of its Material Subsidiaries, a receiver,
   trustee, examiner, liquidator or similar official shall be
   appointed for the Borrower or any of its Material Subsidiaries or
   any Substantial Portion of its Property, or a proceeding
   described in Section 7.6(iv) shall be instituted against the
   Borrower or any of its Material Subsidiaries and in each case
   such appointment continues undischarged or such proceeding
   continues undismissed or unstayed for a period of 60 consecutive
   days.

         7.8.  Any court, government or governmental agency shall
   condemn, seize or otherwise appropriate, or take custody or
   control of, all or any portion of the Property of the Borrower
   and its Subsidiaries which, when taken together with all other
   Property of the Borrower and its Subsidiaries so condemned,
   seized, appropriated, or taken custody or control of, during the
   twelve-month period ending with the month in which any such
   action occurs, constitutes a Substantial Portion.

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   <PAGE>

         7.9.  The Borrower or any of its Subsidiaries shall fail
   within 30 days to pay, bond or otherwise discharge one or more
   (i) judgments or orders for the payment of money (except to the
   extent covered by insurance as to which the insurer has not
   disclaimed coverage) in excess of $5,000,000 (or the equivalent
   thereof in currencies other than Dollars) in the aggregate, or
   (ii) nonmonetary judgments or orders which, individually or in
   the aggregate, could reasonably be expected to have a Material
   Adverse Effect, which judgment(s), in any such case, is/are not
   stayed on appeal or otherwise being appropriately contested in
   good faith in a reasonably timely manner.

         7.10.  The Borrower or any other member of the Controlled
   Group shall have been notified by the sponsor of a Multiemployer
   Plan that it has incurred withdrawal liability to such
   Multiemployer Plan in an amount which, when aggregated with all
   other amounts required to be paid to Multiemployer Plans by the
   Borrower or any other member of the Controlled Group as
   withdrawal liability (determined as of the date of such
   notification), could reasonably be expected to have a Material
   Adverse Effect.

         7.11.  The Borrower or any other member of the Controlled
   Group shall have been notified by the sponsor of a Multiemployer
   Plan that such Multiemployer Plan is in reorganization or is
   being terminated, within the meaning of Title IV of ERISA, if as
   a result of such reorganization or termination the aggregate
   annual contributions of the Borrower and the other members of the
   Controlled Group (taken as a whole) to all Multiemployer Plans
   which are then in reorganization or being terminated have been or
   will be increased over the amounts contributed to such
   Multiemployer Plans for the respective plan years of each such
   Multiemployer Plan immediately preceding the plan year in which
   the reorganization or termination occurs by an amount which
   could reasonably be expected to have a Material Adverse Effect.

         7.12.  The Borrower or any of its Subsidiaries shall (i) be
   the subject of any order by any Governmental Authority or any
   judicial determination of liability pertaining to the release by
   the Borrower, any of its Subsidiaries or any other Person of any
   toxic or hazardous waste or substance into the environment, or
   (ii) violate any Environmental Law, which, in the case of an
   event described in clause (i) or clause (ii), could reasonably be
   expected to have a Material Adverse Effect, taking into account
   amounts to be paid by third parties.

         7.13.  Any Change in Control shall occur.

         7.14.  Any Collateral Document shall fail to remain in full
   force or effect or any action shall be taken by the Borrower or
   any of its Subsidiaries to discontinue or to assert the
   invalidity or unenforceability of any Collateral Document.

         7.15.  Any Guarantor shall take any action to revoke or
   discontinue or to assert the invalidity or unenforceability of
   any Guaranty, or any Guarantor shall deny that is has any further
   liability under any Guaranty to which it is a party, or shall
   give notice to such effect.

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                                ARTICLE VIII

                ACCELERATION, WAIVERS, AMENDMENTS AND REMEDIES

         8.1.  Acceleration.  If any Default described in Section 7.6
   or 7.7 occurs with respect to the Borrower, the obligations of the
   Lenders to make Loans and the obligation of the Issuing Lender to
   issue Letters of Credit hereunder shall automatically terminate and
   the Obligations shall immediately become due and payable without
   any election or action on the part of the Agent, the Issuing Lender
   or any Lender.  If any other Default occurs, the Required Lenders
   (or the Agent with the consent of the Required Lenders) may terminate
   or suspend the obligations of the Lenders to make Loans and the
   obligation of the Issuing Lender to issue Letters of Credit hereunder,
   or declare the Obligations to be due and payable, or both, whereupon
   the Obligations shall become immediately due and payable, without
   presentment, demand, protest or notice of any kind, all of which
   the Borrower hereby expressly waives.

         If, within 30 days after acceleration of the maturity of the
   Obligations or termination of the obligations of the Lenders to
   make Loans and the obligation of the Issuing Lender to issue
   Letters of Credit hereunder as a result of any Default (other
   than any Default as described in Section 7.6 or 7.7 with respect
   to the Borrower) and before any judgment or decree for the
   payment of the Obligations due shall have been obtained or
   entered, the Required Lenders (in their sole discretion) shall so
   direct, the Agent shall, by notice to the Borrower, rescind and
   annul such acceleration and/or termination.

         8.2.  Amendments.  Subject to the provisions of this Article
   VIII, the Required Lenders (or the Agent with the consent in writing
   of the Required Lenders) and the Borrower may enter into agreements
   supplemental hereto for the purpose of adding or modifying any
   provisions to the Loan Documents or changing in any manner the rights
   of the Lenders or the Borrower hereunder or waiving any Default
   hereunder; provided, however, that no such supplemental agreement or
   waiver shall, without the consent of each Lender affected thereby:

         (i)    Extend the final maturity of any Loan or postpone any
                regularly scheduled payment of principal of any Loan,
                postpone the date fixed for any payment of
                Reimbursement Obligations, forgive all or any portion
                of the principal amount of any Loan or Reimbursement
                Obligation, or reduce the rate or extend the time of
                payment of interest or fees hereunder.

         (ii)   Reduce the percentage specified in the definition of
                Required Lenders or amend the definition of Pro Rata
                Share.

         (iii)  Extend the Facility Termination Date or reduce the
                amount or extend the payment date for, the mandatory
                payments required under Section 2.2, or increase the
                amount of the Aggregate Commitment or of the Commitment
                of any Lender hereunder, or reduce the Aggregate
                Commitment other than ratably among the Lenders having

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                Commitments, or permit the Borrower to assign its
                rights under this Agreement.

         (iv)   Amend this Section 8.2.


         (v)    Release any Guarantor, except in connection with a
                disposition of Equity Interests of a Guarantor
                otherwise permitted by the Loan Documents, or, except
                as provided in the Loan Documents, release all or
                substantially all of the Collateral.

   No amendment of any provision of this Agreement relating to the
   Agent shall be effective without the written consent of the
   Agent.  The Agent may waive payment of the fee required under
   Section 12.3.2 without obtaining the consent of any other party
   to this Agreement.  No amendment of any provision of this
   Agreement relating to the Issuing Lender shall be effective
   without the written consent of the Issuing Lender.

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   <PAGE>

         8.3.  Preservation of Rights.  No delay or omission of the
   Lenders, the Issuing Lender or the Agent to exercise any right
   under the Loan Documents shall impair such right or be construed
   to be a waiver of any Default or an acquiescence therein, and the
   making of a Loan or the issuance of a Letter of Credit notwithstanding
   the existence of a Default or the inability of the Borrower to
   satisfy the conditions precedent to such Loan or issuance of such
   Letter of Credit shall not constitute any waiver or acquiescence.
   Any single or partial exercise of any such right shall not
   preclude other or further exercise thereof or the exercise of any
   other right, and no waiver, amendment or other variation of the
   terms, conditions or provisions of the Loan Documents whatsoever
   shall be valid unless in writing signed by the Lenders required
   pursuant to Section 8.2, and then only to the extent in such
   writing specifically set forth.  All remedies contained in the
   Loan Documents or by law afforded shall be cumulative and all
   shall be available to the Agent, the Issuing Lender and the
   Lenders until the Obligations have been paid in full.

                                ARTICLE IX

                            GENERAL PROVISIONS

         9.1.  Survival of Representations.  All representations
   and warranties of the Borrower contained in this Agreement shall
   survive the making of the Loans herein contemplated.

         9.2.  Governmental Regulation.  Anything contained in this
   Agreement to the contrary notwithstanding, no Lender shall be
   obligated to extend credit to the Borrower, and the Issuing Lender
   shall not be obligated to issue any Letter of Credit for the account
   of the Borrower, in violation of any limitation or prohibition provided
   by any applicable statute or regulation.

         9.3.  Headings.  Section headings in the Loan Documents are for
   convenience of reference only, and shall not govern the interpretation
   of any of the provisions of the Loan Documents.

         9.4.  Entire Agreement.  The Loan Documents embody the entire
   agreement and understanding among the Borrower, the Agent and the Lenders
   and supersede all prior agreements and understandings among the Borrower,
   the Agent and the Lenders relating to the subject matter thereof other
   than the fee letter described in Section 10.13.

         9.5.  Several Obligations; Benefits of this Agreement.
   The respective obligations of the Lenders hereunder are several
   and not joint and no Lender shall be the partner or agent of any
   other (except to the extent to which the Agent is authorized to
   act as such).  The failure of any Lender to perform any of its
   obligations hereunder shall not relieve any other Lender from any
   of its obligations hereunder.  This Agreement shall not be
   construed so as to confer any right or benefit upon any Person
   other than the parties to this Agreement and their respective
   successors and assigns, provided, however, that the parties
   hereto expressly agree that the Arranger shall enjoy the benefits
   of the provisions of Sections 9.6, 9.10 and 10.11 to the extent
   specifically set forth therein and shall have the right to
   enforce such provisions on its own behalf and in its own name to

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   <PAGE>


   the same extent as if it were a party to this Agreement.

         9.6.  Expenses; Indemnification.  (i)  The Borrower shall
   reimburse the Agent and the Arranger for any reasonable
   out-of-pocket expenses (including reasonable fees and expenses
   of attorneys for the Agent) paid or incurred by the Agent or the
   Arranger in connection with the preparation, negotiation, execution,
   delivery, syndication, review, amendment, modification, and
   administration of the Loan Documents.  The Borrower also agrees
   to reimburse the Agent, the Issuing Lender and the Lenders for
   any reasonable out-of-pocket expenses (including reasonable fees,
   time charges and expenses of attorneys for the Agent, the Issuing
   Lender and the Lenders, which attorneys may be employees of the
   Agent) paid or incurred by the Agent, the Issuing Lender or any
   Lender in connection with the collection and enforcement of the
   Loan Documents.

         (ii)  The Borrower hereby further agrees to indemnify the
   Agent, the Arranger, the Issuing Lender, each Lender, their
   respective affiliates, and each of their directors, officers and
   employees against all losses, claims, damages, penalties,
   judgments, liabilities and expenses (including, without
   limitation, all expenses of litigation or preparation therefor
   whether or not the Agent, the Arranger, the Issuing Lender, any
   Lender or any of their respective affiliates is a party thereto)
   which any of them may pay or incur arising out of or relating to
   any litigation, investigation, claims or proceedings which arise
   out of or are related to this Agreement, the other Loan
   Documents, the transactions contemplated hereby, the direct or
   indirect application or proposed application of the proceeds of
   any Loan hereunder, or the issuance of any Letter of Credit
   hereunder or the direct or indirect application or proposed
   application of the proceeds of any drawing thereunder, except to
   the extent that they are determined in a final non-appealable
   judgment by a court of competent jurisdiction to have resulted
   from the gross negligence or willful misconduct of the party
   seeking indemnification or any affiliate of such party.   The
   obligations of the Borrower under this Section 9.6 shall survive
   the termination of this Agreement.

         9.7.  Numbers of Documents.  All statements, notices,
   closing documents, and requests hereunder shall be furnished to
   the Agent with sufficient counterparts so that the Agent may
   furnish one to each of the Lenders.

         9.8.  Accounting.  Except as provided to the contrary herein,
   all accounting terms used herein shall be interpreted and all
   accounting determinations hereunder shall be made in accordance
   with Agreement Accounting Principles.

         9.9.  Severability of Provisions.  Any provision in any
   Loan Document that is held to be inoperative, unenforceable, or
   invalid in any jurisdiction shall, as to that jurisdiction, be
   inoperative, unenforceable, or invalid without affecting the
   remaining provisions in that jurisdiction or the operation,
   enforceability, or validity of that provision in any other
   jurisdiction, and to this end the provisions of all Loan
   Documents are declared to be severable.

         9.10.  Nonliability of Lenders.  The relationship between
   the Borrower on the one hand and the Lenders, the Issuing Lender
   and the Agent on the other hand shall be solely that of borrower

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   <PAGE>

   and lender.  Neither the Agent, the Arranger, the Issuing Lender
   nor any Lender shall have any fiduciary responsibilities to the
   Borrower.  Neither the Agent, the Arranger, the Issuing Lender
   nor any Lender undertakes any responsibility to the Borrower to
   review or inform the Borrower of any matter in connection with
   any phase of the Borrower's business or operations.  The Borrower
   agrees that neither the Agent, the Arranger, the Issuing Lender
   nor any Lender shall have liability to the Borrower (whether sounding
   in tort, contract or otherwise) for losses suffered by the Borrower
   in connection with, arising out of, or in any way related to, the
   transactions contemplated and the relationship established by the
   Loan Documents, or any act, omission or event occurring in
   connection therewith, unless it is determined in a final non-
   appealable judgment by a court of competent jurisdiction that
   such losses resulted from the gross negligence or willful
   misconduct of the party from which recovery is sought or any
   affiliate of such party.  Neither the Agent, the Arranger, the
   Issuing Lender nor any Lender shall have any liability with
   respect to, and the Borrower hereby waives, releases and agrees
   not to sue for, any special, indirect or consequential damages
   suffered by the Borrower in connection with, arising out of, or
   in any way related to the Loan Documents or the transactions
   contemplated thereby.

         9.11.  Confidentiality.  Each Lender agrees to hold any
   confidential information which it may receive from the Borrower
   pursuant to this Agreement in confidence, except for disclosure
   (i) to its Affiliates (that are not competitors of the Borrower or
   any Subsidiary in any of their respective lines of business) and
   to other Lenders and their respective Affiliates (that are not
   competitors of the Borrower or any Subsidiary in any of their
   respective lines of business), (ii) to legal counsel, accountants,
   and other professional advisors to such Lender or to a Transferee,
   (iii) as may be required or appropriate, to regulatory officials,
   (iv) to any Person as requested pursuant to or as required by law,
   regulation, or legal process, (v) as may be required or
   appropriate, to any Person in connection with any legal
   proceeding to which such Lender is a party, (vi) to such Lender's
   direct or indirect contractual counterparties in swap agreements
   or to legal counsel, accountants and other professional advisors
   to such counterparties, and (vii) permitted by Section 12.4.

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   <PAGE>


         9.12.  Disclosure.  The Borrower and each Lender hereby
   acknowledge and agree that one or more affiliates of Bank One are or
   may become direct or indirect equity investors in the Borrower, and
   each Lender hereby waives any liability of Bank One or such affiliate
   to such Lender arising out of or resulting from such investments or
   relationships, other than liabilities arising out of the gross
   negligence or willful misconduct of Bank One or its affiliates.

         9.13.  Performance of Obligations.  The Borrower agrees
   that, after the occurrence and during the continuance of a
   Default, the Agent may, but shall have no obligation to, (i) at
   any time, pay or discharge taxes, liens, security interests or
   other encumbrances levied or placed on or threatened against any
   Collateral (other than any of the foregoing which is permitted
   hereunder) and (ii) make any other payment or perform any act
   required of the Borrower under any Loan Document or take any
   other action which the Agent in its discretion deems necessary or
   desirable to protect or preserve the Collateral, including,
   without limitation, any action to (y) effect any repairs or
   obtain any insurance called for by the terms of any of the Loan
   Documents and to pay all or any part of the premiums therefor and
   the costs thereof and (z) pay any rents payable by the Borrower
   which are more than 30 days past due, or as to which the landlord
   has given notice of termination, under any lease.  The Agent
   shall use its reasonable efforts to give the Borrower five (5)
   Business Days' notice of any action taken under this Section 9.13
   prior to the taking of such action; provided that the failure to
   give such notice shall not affect the Borrower's obligations in
   respect thereof.  The Borrower agrees to pay the Agent, promptly
   after receipt of a reasonably detailed invoice therefor, the
   principal amount of all funds advanced by the Agent under this
   Section 9.13, together with interest thereon at the rate from
   time to time applicable to Floating Rate Loans from the date of
   such advance until the outstanding principal balance thereof is
   paid in full.  If the Borrower fails to make payment in respect
   of any such advance under this Section 9.13 within one (1)
   Business Day after the date the Borrower receives written demand
   therefor from the Agent, the Agent shall promptly notify each
   Lender and each Lender agrees that it shall thereupon make
   available to the Agent, in immediately available funds, the
   amount equal to such Lender's Pro Rata Share of such advance.  If
   such funds are not made available to the Agent by such Lender
   within one (1) Business Day after the Agent's demand therefor,
   the Agent will be entitled to recover any such amount from such
   Lender together with interest thereon at the Federal Funds
   Effective Rate for each day during the period commencing on the
   date of such demand and ending on the date such amount is
   received.  The failure of any Lender to make available to the
   Agent its Pro Rata Share of any such unreimbursed advance under
   this Section 9.13 shall neither relieve any other Lender of its
   obligation hereunder to make available to the Agent such other
   Lender's Pro Rata Share of such advance on the date such payment
   is to be made nor increase the obligation of any other Lender to
   make such payment to the Agent.  All outstanding principal of,
   and interest on, advances made under this Section 9.13 shall
   constitute Obligations secured by the Collateral until paid in
   full by the Borrower.

         9.14.  Waiver of Notice.  The Lenders party hereto that are
   lenders party to the Existing Credit Agreement hereby (i) waive the
   requirement of Section 2.5 of the Existing Credit Agreement that
   the Borrower give the agent thereunder ten business days' written
   notice of Termination in whole of the lenders' commitments thereunder
   and (ii) consent to such notice being given prior to 10:00 a.m.
   (Chicago time) on the effective date of such termination.

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   <PAGE>


                                  ARTICLE X

                                  THE AGENT


         10.1.  Appointment; Nature of Relationship.  Bank One, NA,
   having its principal office in Chicago, Illinois is hereby appointed
   by each of the Lenders (including the Issuing Lender, and each reference
   in this Article X to a Lender shall include the Issuing Lender) as its
   contractual representative (herein referred to as the "Agent")
   hereunder and under each other Loan Document, and each of the
   Lenders irrevocably authorizes the Agent to act as the
   contractual representative of such Lender with the rights and
   duties expressly set forth herein and in the other Loan
   Documents.  The Agent agrees to act as such contractual
   representative upon the express conditions contained in this
   Article X.  Notwithstanding the use of the defined term "Agent,"
   it is expressly understood and agreed that the Agent shall not
   have any fiduciary responsibilities to any Lender by reason of
   this Agreement or any other Loan Document and that the Agent is
   merely acting as the contractual representative of the Lenders
   with only those duties as are expressly set forth in this
   Agreement and the other Loan Documents.  In its capacity as the
   Lenders' contractual representative, the Agent (i) does not
   hereby assume any fiduciary duties to any of the Lenders, (ii) is
   a "representative" of the Lenders within the meaning of Section
   9-105 of the Uniform Commercial Code and (iii) is acting as an
   independent contractor, the rights and duties of which are
   limited to those expressly set forth in this Agreement and the
   other Loan Documents.  Each of the Lenders hereby agrees to
   assert no claim against the Agent on any agency theory or any
   other theory of liability for breach of fiduciary duty, all of
   which claims each Lender hereby waives.

         10.2.  Powers.  The Agent shall have and may exercise such
   powers under the Loan Documents as are specifically delegated to the
   Agent by the terms of each thereof, together with such powers as are
   reasonably incidental thereto.  The Agent shall have no implied duties
   to the Lenders, or any obligation to the Lenders to take any action
   thereunder except any action specifically provided by the Loan Documents
   to be taken by the Agent.

         10.3.  General Immunity.  Neither the Agent nor any of its
   directors, officers, agents or employees shall be liable to the Borrower,
   the Lenders or any Lender for any action taken or omitted to be taken by
   it or them hereunder or under any other Loan Document or in
   connection herewith or therewith except to the extent such action
   or inaction is determined in a final non-appealable judgment by a
   court of competent jurisdiction to have arisen from the gross
   negligence or willful misconduct of such Person or any affiliate
   of such Person.

         10.4.  No Responsibility for Loans, Recitals, etc.  Neither
   the Agent nor any of its directors, officers, agents or employees
   shall be responsible for or have any duty to ascertain, inquire into,
   or verify (a) any statement, warranty or representation made in
   connection with any Loan Document or any borrowing hereunder; (b) the
   performance or observance of any of the covenants or agreements of any
   obligor under any Loan Document, including, without limitation, any

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   <PAGE>

   agreement by an obligor to furnish information directly to each Lender;
   (c) the satisfaction of any condition specified in Article IV, except
   receipt of items required to be delivered solely to the Agent;
   (d) the existence or possible existence of any Default or Unmatured
   Default; (e) the validity, enforceability, effectiveness, sufficiency
   or genuineness of any Loan Document or any other instrument or writing
   furnished in connection therewith; (f) the value, sufficiency, creation,
   perfection or priority of any Lien in any collateral security; or (g)
   the financial condition of the Borrower or any guarantor of any of
   the Obligations or of any of the Borrower's or any such guarantor's
   respective Subsidiaries.  The Agent shall have no duty to disclose to
   the Lenders information that is not required to be furnished by the
   Borrower to the Agent at such time, but is voluntarily furnished by
   the Borrower to the Agent (either in its capacity as Agent or in its
   individual capacity).

         10.5.  Action on Instructions of Lenders.  The Agent shall
   in all cases be fully protected in acting, or in refraining from
   acting, hereunder and under any other Loan Document in accordance
   with written instructions signed by the Required Lenders or all
   of the Lenders, as applicable, and such instructions and any
   action taken or failure to act pursuant thereto shall be binding
   on all of the Lenders.  The Lenders hereby acknowledge that the
   Agent shall be under no duty to take any discretionary action
   permitted to be taken by it pursuant to the provisions of this
   Agreement or any other Loan Document unless it shall be requested
   in writing to do so by the Required Lenders or all of the
   Lenders, as applicable.  Agent shall be fully justified in
   failing or refusing to take any action hereunder and under any
   other Loan Document unless it shall first be indemnified to its
   satisfaction by the Lenders pro rata against any and all
   liability, cost and expense that it may incur by reason of taking
   or continuing to take any such action.

         10.6.  Employment of Agents and Counsel.   The Agent may
   execute any of its duties as Agent hereunder and under any other
   Loan Document by or through employees, agents, and
   attorneys-in-fact and shall not be answerable to the Lenders,
   except as to money or securities received by it or its authorized
   agents, for the default or misconduct of any such agents or
   attorneys-in-fact selected by it with reasonable care.  The Agent
   shall be entitled to advice of counsel concerning the contractual
   arrangement between the Agent and the Lenders and all matters
   pertaining to the Agent's duties hereunder and under any other
   Loan Document.

         10.7.  Reliance on Documents; Counsel.  The Agent shall be
   entitled to rely upon any Note, notice, consent, certificate,
   affidavit, letter, telegram, statement, paper or document
   believed by it to be genuine and correct and to have been signed
   or sent by the proper person or persons, and, in respect to legal
   matters, upon the opinion of counsel selected by the Agent, which
   counsel may be employees of the Agent.

         10.8.  Agent's Reimbursement and Indemnification.  The
   Lenders agree to reimburse and indemnify the Agent ratably in
   proportion to their respective Commitments (or, if the
   Commitments have been terminated, in proportion to their
   Commitments immediately prior to such termination) (i) for any
   amounts not reimbursed by the Borrower for which the Agent is
   entitled to reimbursement by the Borrower under the Loan
   Documents, (ii) for any other expenses incurred by the Agent on
   behalf of the Lenders, in connection with the preparation,

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   <PAGE>

   execution, delivery, administration and enforcement of the Loan
   Documents (including, without limitation, for any expenses
   incurred by the Agent in connection with any dispute between the
   Agent and any Lender or between two or more of the Lenders) and
   (iii) for any liabilities, obligations, losses, damages,
   penalties, actions, judgments, suits, costs, expenses or
   disbursements of any kind and nature whatsoever which may be
   imposed on, incurred by or asserted against the Agent in any way
   relating to or arising out of the Loan Documents or any other
   document delivered in connection therewith or the transactions
   contemplated thereby (including, without limitation, for any such
   amounts incurred by or asserted against the Agent in connection
   with any dispute between the Agent and any Lender or between two
   or more of the Lenders), or the enforcement of any of the terms
   of the Loan Documents or of any such other documents, provided
   that (i) no Lender shall be liable for any of the foregoing to
   the extent any of the foregoing is found in a final non-
   appealable judgment by a court of competent jurisdiction to have
   resulted from the gross negligence or willful misconduct of the
   Agent and (ii) any indemnification required pursuant to Section
   3.5(vii) shall, notwithstanding the provisions of this Section
   10.8, be paid by the relevant Lender in accordance with the
   provisions thereof.  The obligations of the Lenders under this
   Section 10.8 shall survive payment of the Obligations and
   termination of this Agreement.

         10.9.  Notice of Default.  The Agent shall not be deemed to
   have knowledge or notice of the occurrence of any Default or Unmatured
   Default hereunder unless the Agent has received written notice from a
   Lender or the Borrower referring to this Agreement describing such
   Default or Unmatured Default and stating that such notice is a "notice of
   default".  In the event that the Agent receives such a notice,
   the Agent shall give prompt notice thereof to the Lenders.

         10.10.  Rights as a Lender.  In the event the Agent is a Lender,
   the Agent shall have the same rights and powers hereunder and under any
   other Loan Document with respect to its Commitment and its Loans
   as any Lender and may exercise the same as though it were not the
   Agent, and the term "Lender" or "Lenders" shall, at any time when
   the Agent is a Lender, unless the context otherwise indicates,
   include the Agent in its individual capacity.  The Agent and its
   affiliates may accept deposits from, lend money to, and generally
   engage in any kind of trust, debt, equity or other transaction,
   in addition to those contemplated by this Agreement or any other
   Loan Document, with the Borrower or any of its Subsidiaries in
   which the Borrower or such Subsidiary is not restricted hereby
   from engaging with any other Person.  The Agent, in its
   individual capacity, is not obligated to remain a Lender.

         10.11.  Lender Credit Decision.  Each Lender acknowledges
   that it has, independently and without reliance upon the Agent,
   the Arranger or any other Lender and based on the financial statements
   prepared by the Borrower and such other documents and information
   as it has deemed appropriate, made its own credit analysis and
   decision to enter into this Agreement and the other Loan
   Documents.  Each Lender also acknowledges that it will,
   independently and without reliance upon the Agent, the Arranger
   or any other Lender and based on such documents and information
   as it shall deem appropriate at the time, continue to make its
   own credit decisions in taking or not taking action under this
   Agreement and the other Loan Documents.

         10.12.  Successor Agent.  The Agent may resign at any time by
   giving written notice thereof to the Lenders and the Borrower, such

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   resignation to be effective upon the appointment of a successor Agent
   or, if no successor Agent has been appointed, forty-five days after the
   retiring Agent gives notice of its intention to resign.  The
   Agent may be removed at any time with or without cause by written
   notice received by the Agent from the Required Lenders, such
   removal to be effective upon the appointment of a successor Agent
   as set forth herein.  Upon any such resignation or removal, the
   Required Lenders shall have the right to appoint, on behalf of
   the Lenders, a successor Agent.  If no successor Agent shall have
   been so appointed by the Required Lenders within thirty days
   after the resigning Agent's giving notice of its intention to
   resign, then the resigning Agent may appoint, on behalf of the
   Lenders, a successor Agent.  Any appointment of a successor Agent
   shall be subject to the Borrower's consent, which shall not be
   unreasonably withheld or delayed, provided that such consent
   shall not be required at any time that a Default shall have
   occurred and be continuing.  Notwithstanding the foregoing, the
   Agent may at any time without the consent of the Borrower or any
   Lender, appoint any of its Affiliates which is a commercial bank
   as a successor Agent hereunder.  No successor Agent shall be
   deemed to be appointed hereunder until such successor Agent has
   accepted the appointment.  Any such successor Agent shall be a
   commercial bank having capital and retained earnings of at least
   $500,000,000.  Upon the acceptance of any appointment as Agent
   hereunder by a successor Agent, such successor Agent shall
   thereupon succeed to and become vested with all the rights,
   powers, privileges and duties of the resigning or removed Agent.
   Upon the effectiveness of the resignation or removal of the
   Agent, the resigning or removed Agent shall be discharged from
   its duties and obligations hereunder and under the Loan
   Documents.  After the effectiveness of the resignation or removal
   of an Agent, the provisions of this Article X shall continue in
   effect for the benefit of such Agent in respect of any actions
   taken or omitted to be taken by it while it was acting as the
   Agent hereunder and under the other Loan Documents.  In the event
   that there is a successor to the Agent by merger, or the Agent
   assigns its duties and obligations to an Affiliate pursuant to
   this Section 10.12, then the term "Corporate Base Rate" as used
   in this Agreement shall mean the prime rate, base rate or other
   analogous rate of the new Agent.

         10.13.  Agent's Fee.  The Borrower agrees to pay to the Agent,
   for its own account, the fees agreed to by the Borrower and the
   Agent pursuant to that certain letter agreement dated July 2, 1999,
   or as otherwise agreed from time to time.

         10.14.  Delegation to Affiliates.  The Borrower and the Lenders
   agree that the Agent may delegate any of its duties under this Agreement
   to any of its Affiliates.  Any such Affiliate (and such Affiliate's
   directors, officers, agents and employees) which performs duties
   in connection with this Agreement shall be entitled to the same
   benefits of the indemnification, waiver and other protective
   provisions to which the Agent is entitled under Articles IX and X.

         10.15.  Execution of Collateral Documents.  The Lenders hereby
   empower and authorize the Agent to execute and deliver to the Borrower
   on their behalf the
   Collateral Documents and any financing statements, agreements,
   documents or instruments as shall be necessary or appropriate to
   effect the purposes of the Collateral Documents.

         10.16.  Collateral Releases.   The Lenders hereby empower and
   authorize the Agent to execute and deliver to the Borrower on their

                                     73
   <PAGE>

   behalf any agreements, documents or instruments as shall be necessary
   or appropriate to effect any releases of Collateral or of any
   Guarantor which shall be permitted by the terms hereof or of any
   other Loan Document or which shall otherwise have been approved
   by the Required Lenders (or, if required by the terms of Section
   8.2, all of the Lenders) in writing.

         10.17.  Co-Agents, etc.   Neither the Syndication Agent nor
   the Documentation Agent nor any Co-Agent shall have any right, power,
   obligation, liability, responsibility or duty under this Agreement
   other than those applicable to all Lenders as such.  Without limiting
   the foregoing, none of such Lenders shall have or be deemed to have a
   fiduciary relationship with any Lender.  Each Lender hereby makes
   the same acknowledgments with respect to such Lenders as it makes
   with respect to the Agent in Section 10.11.


                                 ARTICLE XI

                          SETOFF; RATABLE PAYMENTS


         11.1.  Setoff.  In addition o, and without limitation of,
   any rights of the Lenders or the Issuing Lender under applicable law,
   if the Borrower becomes insolvent, however evidenced, or any Default
   occurs, any and all deposits (including all account balances, whether
   provisional or final and whether or not collected or available, other
   than trust accounts) and any other Indebtedness at any time held or
   owing by any Lender or the Issuing Lender or any Affiliate of any
   Lender or the Issuing Lender to or for the credit or account of the
   Borrower may be offset and applied toward the payment of the
   Obligations owing to such Lender or the Issuing Lender, whether
   or not the Obligations, or any part hereof, shall then be due.

         11.2.  Ratable Payments.  If any Lender, whether by setoff or
   otherwise, has payment made to it upon its Loans (other than payments
   received pursuant to Section 3.1, 3.2, 3.4 or 3.5) in a greater
   proportion than that received by any other Lender, such Lender agrees,
   promptly upon demand, to purchase a portion of the Loans held by the
   other Lenders so that after such purchase each Lender will hold its
   ratable proportion of Loans.  If any Lender, whether in
   connection with setoff or amounts which might be subject to
   setoff or otherwise, receives collateral or other protection for
   its Obligations or such amounts which may be subject to setoff,
   such Lender agrees, promptly upon demand, to take such action
   necessary such that all Lenders share in the benefits of such
   collateral ratably in proportion to their Loans.  In case any
   such payment is disturbed by legal process, or otherwise,
   appropriate further adjustments shall be made.

         11.3.  Application of Payments.  So long as a Default shall
   have occurred and be continuing, or if the Borrower shall otherwise
   fail to direct the application of payments hereunder, the Agent
   shall, unless otherwise specified at the direction of the Required
   Lenders, which direction shall be consistent with the last sentence of

                                     74
   <PAGE>

   this Section 11.3, apply all payments and prepayments (other than
   prepayments pursuant to Section 2.7.1) in respect of any
   Obligations and all proceeds of Collateral in the following order:

            (A)  first, to pay interest on and then principal of
   any portion of the Loans which the Agent may have advanced
   on behalf of any Lender for which the Agent has not then
   been reimbursed by such Lender or the Borrower;

            (B)  second, to pay interest on and then principal of
   any advance made under Section 9.13 for which the Agent has
   not then been paid by the Borrower or reimbursed by the
   Lenders;

            (C)  third, to pay Obligations in respect of any fees,
   expenses, reimbursements or indemnities then due to the
   Agent;

            (D)  fourth, to pay Obligations in respect of any fees,
   expenses, reimbursements or indemnities then due to the
   Lenders and the Issuing Lender;

            (E)  fifth, to pay interest due in respect of the Loans
   and Reimbursement Obligations;

            (F)  sixth, to the ratable payment or prepayment of
   principal outstanding on Loans, Reimbursement Obligations
   and Rate Management Obligations in such order as the Agent
   may determine in its sole discretion; and

            (G)  seventh, to the ratable payment of all other
   Obligations.

   Unless otherwise designated (which designation shall only be
   applicable prior to the occurrence of a Default) by the Borrower,
   all principal payments in respect of Loans shall be applied
   first, to the outstanding Revolving Loans, and second, to the
   outstanding Term Loans, in each case, first, to repay outstanding
   Floating Rate Loans, and then to repay outstanding Eurocurrency
   Rate Loans with those Eurocurrency Rate Loans which have earlier
   expiring Interest Periods being repaid prior to those which have
   later expiring Interest Periods.  The order of priority set forth
   in this Section 11.3 and the related provisions of this Agreement
   are set forth solely to determine the rights and priorities of
   the Agent, the Lenders and other Holders of Secured Obligations
   as among themselves.  The order of priority set forth in clauses
   (D) through (G) of this Section 11.3 may at any time and from
   time to time be changed by the Required Lenders without necessity
   of notice to or consent of or approval by the Borrower, or any
   other Person.  The order of priority set forth in clauses (A)
   through (C) of this Section 11.3 may be changed only with the
   prior written consent of the Agent.

         11.4.  Relations Among Lenders.

         Except with respect to the exercise of set-off rights of any
   Lender in accordance with Section 11.1, the proceeds of which are
   applied in accordance with this Agreement, and except as set
   forth in the following sentence, each Lender agrees that it will

                                     75
   <PAGE>

   not take any action, nor institute any actions or proceedings,
   against the Borrower or any other obligor hereunder or with
   respect to any Collateral or Loan Document, without the prior
   written consent of the Required Lenders or, as may be provided in
   this Agreement or the other Loan Documents, at the direction of
   the Agent.  Notwithstanding the foregoing, and subject to Section
   11.2, any Lender shall have the right to enforce on an unsecured
   basis the payment of the principal of and interest on any Loan
   made by it after the date such principal or interest has become
   due and payable pursuant to the terms of this Agreement.


                                ARTICLE XII

              BENEFIT OF AGREEMENT; ASSIGNMENTS; PARTICIPATIONS


         12.1.  Successors and Assigns.  The terms and provisions
   of the Loan Documents shall be binding upon and inure to the benefit
   of the Borrower, the Agent, the Issuing Lender and the Lenders and
   their respective successors and assigns, except that (i) the Borrower
   shall not have the right to assign its rights or obligations
   under the Loan Documents, (ii) any assignment by any Lender must
   be made in compliance with Section 12.3 and (iii) any assignment
   or delegation of duties by the Agent shall be made only in
   compliance with Article X.  The parties to this Agreement
   acknowledge that clause (ii) of this Section 12.1 relates only to
   absolute assignments and does not prohibit assignments creating
   security interests, including, without limitation, any pledge or
   assignment by any Lender of all or any portion of its rights
   under this Agreement and any Note to a Federal Reserve Bank;
   provided, however, that no such pledge or assignment creating a
   security interest shall release the transferor Lender from its
   obligations hereunder unless and until the parties thereto have
   complied with the provisions of Section 12.3.  The Agent may
   treat the Person which made any Loan or which holds any Note as
   the owner thereof for all purposes hereof unless and until such
   Person complies with Section 12.3; provided, however, that the
   Agent may in its discretion (but shall not be required to) follow
   instructions from the Person which made any Loan or which holds
   any Note to direct payments relating to such Loan or Note to
   another Person.  Any assignee of the rights to any Loan or any
   Note agrees by acceptance of such assignment to be bound by all
   the terms and provisions of the Loan Documents.  Any request,
   authority or consent of any Person, who at the time of making
   such request or giving such authority or consent is the owner of
   the rights to any Loan (whether or not a Note has been issued in
   evidence thereof), shall be conclusive and binding on any
   subsequent holder or assignee of the rights to such Loan.

         12.2.  Participations.

                12.2.1.  Permitted Participants; Effect.  Any Lender
         may, in the ordinary course of its business and in accordance
         with applicable law, at any time sell to one or more banks or
         other entities that are not competitors of the Borrower or
         any Subsidiary in any of their respective lines of business
         ("Participants") participating interests in any Loan owing
         to such Lender, any Note held by such Lender, any Commitment
         of such Lender, any L/C Interest of such Lender or any other
         interest of such Lender under the Loan Documents.  In the

                                     76
   <PAGE>

         event of any such sale by a Lender of participating
         interests to a Participant, such Lender's obligations under
         the Loan Documents shall remain unchanged, such Lender shall
         remain solely responsible to the other parties hereto for
         the performance of such obligations, such Lender shall
         remain the owner of its Loans and L/C Interests and the
         holder of any Note issued to it in evidence thereof for all
         purposes under the Loan Documents, all amounts payable by
         the Borrower under this Agreement shall be determined as if
         such Lender had not sold such participating interests, and
         the Borrower and the Agent shall continue to deal solely and
         directly with such Lender in connection with such Lender's
         rights and obligations under the Loan Documents.

                12.2.2.  Voting Rights.  Each Lender shall retain the sole
         right to approve, without the consent of any Participant, any
         amendment, modification or waiver of any provision of the Loan
         Documents other than any amendment, modification or waiver
         with respect to any Loan, L/C Interest or Commitment in
         which such Participant has an interest which forgives
         principal, interest or fees or reduces the interest rate or
         fees payable with respect to any such Loan, L/C Interest or
         Commitment, extends the Facility Termination Date, postpones
         any date fixed for any regularly-scheduled payment of
         principal of, or interest or fees on, any such Loan, L/C
         Interest or Commitment, releases any guarantor of any such
         Loan or Reimbursement Obligation or releases all or
         substantially all of the collateral, if any, securing any
         such Loan or Reimbursement Obligation.

                12.2.3.  Benefit of Setoff.  The Borrower agrees that
         each Participant shall be deemed to have the right of setoff
         provided in Section 11.1 in respect of its participating
         interest in amounts owing under the Loan Documents to the
         same extent as if the amount of its participating interest
         were owing directly to it as a Lender under the Loan Documents,
         provided that each Lender shall retain the right of setoff
         provided in Section 11.1 with respect to the amount of
         participating interests sold to each Participant.  The
         Lenders agree to share with each Participant, and each
         Participant, by exercising the right of setoff provided in
         Section 11.1, agrees to share with each Lender, any amount
         received pursuant to the exercise of its right of setoff,
         such amounts to be shared in accordance with Section 11.2 as
         if each Participant were a Lender.

         12.3.  Assignments.

                12.3.1.  Permitted Assignments.  Any Lender or the
         Issuing Lender may, in the ordinary course of its business and
         in accordance with applicable law, at any time assign to one or
         more banks or other entities that are not competitors of the
         Borrower or any Subsidiary in any of their respective lines of
         business ("Purchasers") all or any part of its rights and
         obligations under the Loan Documents.  Each assignment shall
         be of a constant, and not a varying, ratable percentage of
         all of the assigning Lender's rights and obligations under
         this Agreement.  Such assignment shall be substantially in
         the form of Exhibit B or in such other form as may be agreed
         to by the parties thereto.  The consent of the Agent and, so
         long as no Default exists, the consent of the Borrower shall
         be required prior to an assignment becoming effective with
         respect to a Purchaser which is not a Lender or an affiliate

                                     77
   <PAGE>

         thereof.  Such consent shall not be unreasonably withheld or
         delayed.  Each such assignment with respect to a Purchaser
         which is not a Lender or an affiliate thereof shall (unless
         the Agent otherwise consents) be in an amount not less than
         the lesser of (i) $5,000,000 or (ii) the remaining amount of
         the assigning Lender's Commitment and outstanding Term Loans
         (calculated as at the date of such assignment) or its
         outstanding Loans and L/C Interests (if the applicable
         Commitment has been terminated).

                12.3.2.  Effect; Effective Date.  Upon (i) delivery
         to the Agent of an assignment, together with any consents required
         by Section 12.3.1, and (ii) payment of a $3,500 fee to the Agent
         for processing such assignment (unless such fee is waived by the
         Agent), such assignment shall become effective on the
         effective date specified in such assignment.  The assignment
         shall contain a representation by the Purchaser to the
         effect that none of the consideration used to make the
         purchase of the Commitment, Loans and L/C Interests under
         the applicable assignment agreement constitutes "plan
         assets" as defined under ERISA and that the rights and
         interests of the Purchaser in and under the Loan Documents
         will not be "plan assets" under ERISA.  On and after the
         effective date of such assignment, such Purchaser shall for
         all purposes be a Lender party to this Agreement and any
         other Loan Document executed by or on behalf of the Lenders
         and shall have all the rights and obligations of a Lender
         under the Loan Documents, to the same extent as if it were
         an original party hereto, and no further consent or action
         by the Borrower, the Lenders or the Agent shall be required
         to release the transferor Lender with respect to the
         percentage of the Aggregate Commitment, Loans and L/C
         Interests assigned to such Purchaser.  Upon the consummation
         of any assignment to a Purchaser pursuant to this Section
         12.3.2, the transferor Lender, the Agent and the Borrower
         shall, if the transferor Lender or the Purchaser desires
         that its Loans be evidenced by Notes, make appropriate
         arrangements so that new Notes or, as appropriate,
         replacement Notes are issued to such transferor Lender and
         new Notes or, as appropriate, replacement Notes, are issued
         to such Purchaser, in each case in principal amounts
         reflecting their respective Commitments and Term Loans, as
         adjusted pursuant to such assignment.

         12.4.  Dissemination of Information.  The Borrower authorizes
   each Lender to disclose to any Participant or Purchaser or any other
   Person acquiring an interest in the Loan Documents by operation of
   law (each a "Transferee") and any prospective Transferee any and all
   information in such Lender's possession concerning the creditworthiness
   of the Borrower and its Subsidiaries, including without limitation any
   information contained in any Reports; provided that each Transferee and
   prospective Transferee agrees to be bound by Section 9.11 of this
   Agreement.

         12.5.  Tax Treatment.  If any interest in any Loan Document is
   transferred to any Transferee which is organized under the laws of any
   jurisdiction other than the United States or any State thereof, the
   transferor Lender shall cause such Transferee, concurrently with the
   effectiveness of such transfer, to comply with the provisions of
   Section 3.5(iv).

                                     78

   <PAGE>


                               ARTICLE XIII

                                 NOTICES


         13.1.  Notices.  Except as otherwise permitted by Section 2.14
   with respect to borrowing notices, all notices, requests and other
   communications to any party hereunder shall be in writing (including
   electronic transmission, facsimile transmission or similar writing) and
   shall be given to such party: (x) in the case of the Borrower or
   the Agent, at its address or facsimile number set forth on the
   signature pages hereof, (y) in the case of any Lender, at its
   address or facsimile number set forth below its signature hereto
   or (z) in the case of any party, at such other address or
   facsimile number as such party may hereafter specify for the
   purpose by notice to the Agent and the Borrower in accordance
   with the provisions of this Section 13.1.  Each such notice,
   request or other communication shall be effective (i) if given by
   facsimile transmission, when transmitted to the facsimile number
   specified in this Section and confirmation of receipt is
   received, (ii) if given by mail, seven days after such
   communication is deposited in the mails with first class postage
   prepaid, addressed as aforesaid, or (iii) if given by any other
   means, when delivered (or, in the case of electronic
   transmission, received) at the address specified in this Section;
   provided that notices to the Agent under Article II shall not be
   effective until received.

         13.2.  Change of Address.  The Borrower, the Agent and any
   Lender may each change the address for service of notice upon it
   by a notice in writing to the other parties hereto.


                               ARTICLE XIV

                               COUNTERPARTS


         This Agreement may be executed in any number of
   counterparts, all of which taken together shall constitute one
   agreement, and any of the parties hereto may execute this
   Agreement by signing any such counterpart.  This Agreement shall
   be effective when it has been executed by the Borrower, the Agent
   and the Lenders and each party has notified the Agent by
   facsimile transmission or telephone that it has taken such
   action.


                                ARTICLE XV

     CHOICE OF LAW; CONSENT TO JURISDICTION; WAIVER OF JURY TRIAL

         15.1.  CHOICE OF LAW.  THE LOAN DOCUMENTS (OTHER THAN THOSE
   CONTAINING A CONTRARY EXPRESS CHOICE OF LAW PROVISION) SHALL BE
   CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS (INCLUDING, WITHOUT

                                     79
   <PAGE>

   LIMITATION, 735 ILCS SECTION 105/5-1 ET SEQ, BUT OTHERWISE WITHOUT
   REGARD TO THE CONFLICT OF LAWS PROVISIONS) OF THE STATE OF ILLINOIS,
   BUT GIVING EFFECT TO FEDERAL LAWS APPLICABLE TO NATIONAL BANKS.

         15.2.  CONSENT TO JURISDICTION.  THE BORROWER HEREBY IRREVOCABLY
   SUBMITS TO THE NON-EXCLUSIVE JURISDICTION OF ANY UNITED STATES FEDERAL
   OR ILLINOIS STATE COURT SITTING IN CHICAGO, ILLINOIS IN ANY ACTION
   OR PROCEEDING ARISING OUT OF OR RELATING TO ANY LOAN DOCUMENTS
   AND THE BORROWER HEREBY IRREVOCABLY AGREES THAT ALL CLAIMS IN
   RESPECT OF SUCH ACTION OR PROCEEDING MAY BE HEARD AND DETERMINED
   IN ANY SUCH COURT AND IRREVOCABLY WAIVES ANY OBJECTION IT MAY NOW
   OR HEREAFTER HAVE AS TO THE VENUE OF ANY SUCH SUIT, ACTION OR
   PROCEEDING BROUGHT IN SUCH A COURT OR THAT SUCH COURT IS AN
   INCONVENIENT FORUM.  NOTHING HEREIN SHALL LIMIT THE RIGHT OF THE
   AGENT OR ANY LENDER TO BRING PROCEEDINGS AGAINST THE BORROWER IN
   THE COURTS OF ANY OTHER JURISDICTION.

         15.3.  WAIVER OF JURY TRIAL.  THE BORROWER, THE AGENT AND
   EACH LENDER HEREBY WAIVE TRIAL BY JURY IN ANY JUDICIAL PROCEEDING
   INVOLVING, DIRECTLY OR INDIRECTLY, ANY MATTER (WHETHER SOUNDING IN
   TORT, CONTRACT OR OTHERWISE) IN ANY WAY ARISING OUT OF, RELATED TO,
   OR CONNECTED WITH ANY LOAN DOCUMENT OR THE RELATIONSHIP ESTABLISHED
   THEREUNDER.

                                     80
   <PAGE>

         IN WITNESS WHEREOF, the Borrower, the Lenders and the Agent
   have executed this Agreement as of the date first above written.

                                BIO-RAD LABORATORIES, INC.


                                By: /s/ Ronald W. Hutton
                                 Name: Ronald W. Hutton
                                 Title: Treasurer

                                Address:   1000 Alfred Nobel Drive
                                Hercules,  California  94547

                                Attention: Chief Financial Officer
                                           (with a copy to the General
                                           Counsel)

                                Telephone: (510) 741-7000
                                FAX:       (510) 741-5815

   Commitments

   $15,000,000                  BANK ONE, NA,
                                Individually as a Lender, as an Issuing
                                Lender and as Agent


                                By: /s/ Anthony B. Mathews
                                    Name: Anthony B. Mathews
                                    Title: Sr. Vice President

                                Address:    777 South Figueroa Street
                                            4th Floor
                                            Los Angeles, California  60670

                                Attention:  Anthony B. Mathews
                                Telephone:  (213)683-4957
                                FAX:        (213)683-4999
   <PAGE>


   $12,500,000                  ABN AMRO BANK N.V.,
                                Individually as a Lender and as Syndication
                                Agent



                                By:  /s/ Clay Jackson
                                     Name:  Clay Jackson
                                     Title: Senior Vice President



                                By:  /s/ Gina M. Brusatori
                                     Name:  Gina M. Brusatori
                                     Title: Group Vice President

                                Address:   101 California Street
                                           Suite 4550
                                           San Francisco, CA 94111
                                Attention: Jeffrey French
                                Telephone: (415)984-3703
                                Facsimile: (415)362-3524

   <PAGE>

   $12,500,000                  UNION BANK OF CALIFORNIA, N.A.,
                                Individually as a Lender and as
                                Documentation Agent



                                By: /s/ Michael E. Cooper
                                    Name:  Michael E. Cooper
                                    Title: Vice President

                                Address:   1800 Harrison Street
                                           Suite 1400
                                           Oakland, CA 94612-3429
                                Attention: Michael e. cooper
                                Telephone: (510)271-1742
                                Facsimile: (510)271-1764

  <PAGE>

   $8,750,000                   THE BANK OF NOVA SCOTIA,
                                Individually as a Lender and as Co-Agent




                                By: /s/ R. P. Reynolds
                                    Name:  R.P. Reynolds
                                    Title: Relationship Manager

                                Address:    580 California Street
                                            Suite 2100
                                            San Francisco, CA 94104
                                Attention:  Robert P. Reynolds
                                Telephone:  (415)986-1100
                                Facsimile:  (415)397-0791

   <PAGE>

   $8,750,000                   BANQUE NATIONALE DE PARIS,
                                Individually as a Lender and as Co-Agent



                                By: /s/ Katherine Wolfe
                                    Name:  Katherine Wolfe
                                    Title: Vice President


                                By: /s/ Sandra F. Bertram
                                    Name:  Sandra F. Bertram
                                    Title: Assistant Vice President

                                Address:   180 Montgomery Street
                                           San Francisco, CA 94104
                                Attention: Sandy Bertram
                                Telephone: (415)772-1333
                                Facsimile: (415)296-8954

   <PAGE>

   $8,750,000                   COOPERATIEVE CENTRALE
                                RAIFFEISEN-BOERENLEENBANK B.A.
                                "RABOBANK INTERNATIONAL", NEW
                                YORK BRANCH,
                                Individually as a Lender and as Co-Agent



                                By: /s/ Michiel V.M. Van der Voort
                                    Name:  Michiel V.M. Van der Woort
                                    Title: Vice President



                                By: /s/ Edward Peyser
                                    Name:  Edwar Peyser
                                    Title: Vice President

                                Address:   4 Embarcadero Center
                                           Suite 3200
                                           San Francisco, CA 94111
                                Attention: Richard Cerf
                                Telephone: (415)782-9830
                                Facsimile: (415)986-8349

   <PAGE>

   $8,750,000                   WELLS FARGO BANK,
                                Individually as a Lender and as Co-Agent



                                By: /s/ Brian S. O'Melveny
                                    Name:  Brian S. O'Melveny
                                    Title: V. P.

                                Address:   One Kaiser Plaza
                                           Suite 850
                                           Oakland, CA 94612
                                Attention: Brian O'Melveny
                                Telephone: (510)464-1842
                                Facsimile: (510)839-2296

   <PAGE>

   $5,000,000                   COMERICA BANK-CALIFORNIA



                                By: /s/ R. Michael Law
                                    Name:  R. Michael Law
                                    Title: Vice President

                                Address:   155 Grand Avenue
                                           Suite 402
                                           Oakland, CA 94612
                                Attention: R. Michael Law
                                Telephone: (510)645-2205
                                Facsimile: (510)645-2220

   <PAGE>

   $5,000,000                   CREDIT LYONNAIS NEW YORK
                                BRANCH



                                By: /s/ Robert Ivosevich
                                    Name:  Robert Ivosevich
                                    Title: Senior Vice President

                                Address:   515 South Flower Street
                                           22nd Floor
                                           Los Angeles, CA 90071
                                Attention: Rita Raychaudhuri
                                Telephone: (213)362-5954
                                Facsimile: (213)623-3437

   <PAGE>

   $5,000,000                   LLOYDS TSB BANK PLC



                                By: /s/ David Rodway
                                    Name:  David Rodway
                                    Title: Assistant Director



                                By: /s/ Paul Briamonte
                                    Name:  Paul Briamonte
                                    Title: Director

                                Address:   575 Fifth Avenue
                                           17th Floor
                                           New York, NY 10017
                                Attention: Ian Dimmock
                                Telephone: (212)930-5051
                                Facsimile: (212)930-5098

   <PAGE>

   $5,000,000                   U.S. BANK, NATIONAL ASSOCIATION



                                By: /s/ Meredith N. Davis
                                    Name:  Meredith N. Davis
                                    Title: Assistant Vice President

                                Address:   2890 N. Main Street
                                           Walnut Creek, CA 94596
                                Attention: Meredith Davis
                                Telephone: (925)942-9467
                                Facsimile: (925)945-6919

   <PAGE>

   $5,000,000                   THE NORTHERN TRUST COMPANY



                                By: /s/ Candelario Martinez
                                    Name:  Candelario Martinez
                                    Title: Vice President

                                Address:   50 South LaSalle Street
                                           Suite BB02
                                           Chicago, IL 60675
                                Attention: Candelario Martinez
                                Telephone: (312)557-2816
                                Facsimile: (312)444-7028

   <PAGE>

   LIST OF EXHIBITS & SCHEDULES TO THE CREDIT AGREEMENT

   Reference in
   the Credit
   Agreement        Description of the exhibit or the Schedule

   Exhibit A        Compliance Certificate
   Exhibit B        Form of Assignment Agreement
   Exhibit C-1      Form of Term Note
   Exhibit C-2      Form of Revolving Note

                    Pricing Schedule
   Sched. 2.4       Existing Letters of Credit
   Sched. 4.1       List of Closing Documents
   Sched. 5.4       Pro Forma Financial Statements
   Sched. 5.7       Litigation
   Sched. 5.8       Subsidiaries
   Sched. 5.22      Insurance
   Sched. 6.11      Indebtedness
   Sched. 6.14      Investments
   Sched. 6.15      Liens



<PAGE>
                                                                      EXIBIT 4.2


                   SENIOR SUBORDINATED CREDIT AGREEMENT

                               dated as of

                            September 30, 1999





                                   among


                         BIO-RAD LABORATORIES, INC.,
                                as Company,


                          THE LENDERS named herein


                                    and


                   BANC ONE CAPITAL MARKETS, INC., as Agent








   <PAGE>

                               TABLE OF CONTENTS

                                                                      Page

   SECTION 1.     DEFINITIONS ........................................   1
           1.1    Certain Defined Terms...............................   1
           1.2    Accounting Terms....................................  27
           1.3    Other Definitional Provisions; Anniversaries........  28

   SECTION 2.     AMOUNT AND TERMS OF LOAN COMMITMENT AND
                  LOANS; NOTES .......................................  28
           2.1    Bridge Loan and Bridge Note.........................  28
           2.2    Rollover Bridge Loan and Rollover Bridge Note.......  30
           2.3    Interest on the Notes ..............................  31
           2.4    Fees................................................  33
           2.5    Prepayments and Payments............................  33
           2.6    Use of Proceeds.....................................  36
           2.7    Interest Rate Unascertainable, Increased Costs,
                   Illegality.........................................  37
           2.8    Funding Losses......................................  38
           2.9    Increased Capital...................................  39
           2.10   Taxes...............................................  40

   SECTION 3.     CONDITIONS..........................................  42
           3.1    Conditions to Bridge Loan...........................  42
           3.2    Conditions to Rollover Bridge Loan..................  47

   SECTION 4.     REPRESENTATIONS AND WARRANTIES
                  OF THE COMPANY......................................  48
           4.1    Existence and Standing..............................  49
           4.2    Authorization and Validity..........................  49
           4.3    No Conflict; Government Consent.....................  49
           4.4    Financial Statements................................  50
           4.5    Material Adverse Change.............................  51
           4.6    Taxes...............................................  51
           4.7    Litigation and Contingent Obligations...............  51
           4.8    Subsidiaries........................................  51
           4.9    ERISA...............................................  52
           4.10   Accuracy of Information.............................  52
           4.11   Regulation U........................................  52
           4.12   Material Agreements.................................  52

                                            i
   <PAGE>
           4.13   Compliance With Laws................................  52
           4.14   Ownership of Properties.............................  53
           4.15   Plan Assets; Prohibited Transactions................  53
           4.16   Environmental Matters...............................  53
           4.17   Investment Company Act..............................  54
           4.18   Public Utility Holding Company Act..................  54
           4.19   Year 2000...........................................  54
           4.20   Post-Retirement Benefits............................  54
           4.21   Insurance...........................................  54
           4.22   The PSD Acquisition.................................. 55
           4.23   Solvency............................................. 56

   SECTION 4A.    REPRESENTATIONS AND WARRANTIES
                   OF THE LENDERS.....................................  56
           4A.1   Accredited Investor.................................  56
           4A.2   Knowledge and Experience............................  57
           4A.3   Source of Funds.....................................  57

   SECTION 5.     AFFIRMATIVE COVENANTS...............................  57
           5.1    Financial Reporting.................................  57
           5.2    Use of Proceeds.....................................  59
           5.3    Notice of Default...................................  59
           5.4    Conduct of Business.................................  59
           5.5    Taxes...............................................  59
           5.6    Insurance...........................................  60
           5.7    Compliance with Laws................................  60
           5.8    Maintenance of Properties...........................  60
           5.9    Inspection..........................................  60
           5.10   Year 2000...........................................  61
           5.11   Additional Guarantors...............................  61
           5.12   Exchange of Rollover Bridge Notes...................  62
           5.13   Permanent Securities................................  62
           5.14   Lenders Meeting.....................................  63
           5.15   Note Documents......................................  63
           5.16   Syndication.........................................  64

   SECTION 6.     NEGATIVE COVENANTS..................................  65
           6.1    Dividends...........................................  65
           6.2    Indebtedness........................................  65
           6.3    Merger..............................................  66

                                           ii
   <PAGE>
           6.4    Sale of Assets......................................  67
           6.5    Investments and Acquisitions........................  67
           6.6    Liens...............................................  68
           6.7    Capital Expenditures................................  70
           6.8    Limitation on Dividend and Other Payment
                    Restrictions Affecting Subsidiaries...............  70
           6.9    Affiliates..........................................  72
           6.10   Unfunded Liabilities................................  72
           6.11   Limitation on Modifications of Certain Documents....  72
           6.12   Sale and Leaseback Transactions.....................  73
           6.13   Contingent Obligations..............................  73
           6.14   Financial Contracts.................................  73
           6.15   Refinancing of the Loans in Part....................  73
           6.16   Senior Subordinated Indebtedness....................  73
           6.17   Leverage Ratio......................................  74

   SECTION 7.     EVENTS OF DEFAULT...................................  74
           7.1    Events of Default...................................  74
           7.2    Acceleration........................................  77

   SECTION 8.     SUBORDINATION.......................................  78
           8.1    Obligations Subordinated to Senior Debt of the
                    Company...........................................  78
           8.2    Priority and Payment Over of Proceeds in Certain
                    Events............................................  78
           8.3    Payments May Be Paid Prior to Dissolution...........  81
           8.4    Rights of Holders of Senior Debt of the Company
                    Not To Be Impaired................................  81
           8.5    Subrogation.........................................  82
           8.6    Obligations of the Company Unconditional............  83
           8.7    Lenders Authorize Agent To Effectuate Subordination.  83

   SECTION 9.     THE AGENT...........................................  84
           9.1    Appointment.........................................  84
           9.2    Delegation of Duties................................  84
           9.3    Exculpatory Provisions..............................  85
           9.4    Reliance by Agent...................................  85
           9.5    Notice of Default...................................  86
           9.6    Non-Reliance on Agent and Other Lenders.............  86
           9.7    Indemnification.....................................  87
           9.8    Agent in Its Individual Capacity....................  87
           9.9    Resignation of the Agent; Successor Agent...........  88

                                         iii
   <PAGE>

   SECTION 10.    GUARANTEE...........................................  88
           10.1   Unconditional Guarantee.............................  88
           10.2   Subordination of Guarantee..........................  89
           10.3   Severability........................................  89
           10.4   Release of a Guarantor..............................  89
           10.5   Limitation of Guarantor's Liability.................  90
           10.6   Guarantors May Consolidate, etc., on Certain Terms..  90
           10.7   Contribution........................................  91
           10.8   Waiver of Subrogation...............................  92
           10.9   Evidence of Guarantee...............................  92
           10.10  Waiver of Stay, Extension or Usury Laws.............  92

   SECTION 11.    SUBORDINATION OF GUARANTEE OBLIGATIONS..............  93
           11.1   Guarantee Obligations Subordinated to Guarantor
                    Senior Debt.......................................  93
           11.2   Priority and Payment Over of Proceeds in Certain
                    Events............................................  93
           11.3   Payments May Be Paid Prior to Dissolution...........  96
           11.4   Rights of Holders of Guarantor Senior Debt Not To
                    Be Impaired.......................................  96
           11.5   Subrogation.........................................  97
           11.6   Obligations of the Guarantors Unconditional.........  98
           11.7   Lenders Authorize Agent To Effectuate Subordination.  98

   SECTION 12.    WARRANTS............................................  99

   SECTION 13.    MISCELLANEOUS....................................... 101
           13.1   Participations in and Assignments of Loans and
                    Notes............................................. 101
           13.2   Expenses............................................ 102
           13.3   Indemnity........................................... 103
           13.4   Setoff.............................................. 104
           13.5   Amendments and Waivers.............................. 104
           13.6   Independence of Covenants........................... 105
           13.7   Entirety............................................ 105
           13.8   Notices............................................. 106
           13.9   Survival of Warranties and Certain Agreements....... 106
           13.10  Failure or Indulgence Not Waiver; Remedies
                    Cumulative........................................ 106
           13.11  Severability........................................ 107
           13.12  Headings............................................ 107
           13.13  Applicable Law...................................... 107
           13.14  Successors and Assigns; Subsequent Holders of Notes. 107
           13.15  Counterparts; Effectiveness......................... 107

                                         iv

   <PAGE>

           13.16  Consent to Jurisdiction; Venue; Waiver of Jury
                    Trial............................................. 108
           13.17  Payments Pro Rata................................... 109
           13.18  Waiver of Stay, Extension or Usury Laws............. 109
           13.19  Confidentiality..................................... 110
           13.20  Register............................................ 110



   ANNEX I          Lending Offices

   SCHEDULES

   Schedule 4.4     Pro Forma Financial Statements
   Schedule 4.7     Litigation
   Schedule 4.8     Subsidiaries
   Schedule 4.21    Insurance
   Schedule 6.2     Indebtedness
   Schedule 6.5     Investments
   Schedule 6.6     Liens

   EXHIBITS

   I        FORM OF BRIDGE NOTE
   II       FORM OF ROLLOVER BRIDGE NOTE
   III      FORM OF COMPLIANCE CERTIFICATE
   IV-A     FORM OF NOTICE OF BORROWING
   IV-B     FORM OF ROLLOVER NOTICE
   V        FORM OF OPINION OF LATHAM & WATKINS - COUNSEL FOR THE
            COMPANY
   VI       FORM OF NOTATION ON NOTE RELATING TO GUARANTEES
   VII      FORM OF ESCROW AGREEMENT
   VIII     FORM OF WARRANT AGREEMENT

                                      v

   <PAGE>


            This Senior Subordinated Credit Agreement is dated as of
   September 30, 1999, and entered into by and between Bio-Rad Laboratories,
   Inc., a Delaware corporation (the "Company"), the Lenders named on the
   signature pages hereto (the "Lenders"), and Banc One Capital Markets, Inc.
   ("BOCM"), as agent for the Lenders (in such capacity, the "Agent").


                                 RECITALS

            WHEREAS, the Company desires that the Lenders extend a
   senior subordinated credit facility to the Company in connection with
   the PSD Acquisition (as defined herein);

            NOW, THEREFORE, in consideration of the premises and the
   agreements, provisions and covenants herein contained, the parties
   hereby agree as follows:

   SECTION 1. DEFINITIONS

            1.1 Certain Defined Terms. The following terms used in this
   Agreement shall have the followingb meanings:

            "Acquired Business" is defined in the definition of "PSD
   Acquisition."

            "Acquired Indebtedness" means Indebtedness of a Person
   existing at the time such Person becomes a Subsidiary or is merged or
   consolidated into the Company or one of its Subsidiaries.

            "Acquisition" means any transaction, or any series of
   related transactions, consummated on or after the date of this
   Agreement, by which the Company or any of its Subsidiaries (i)
   acquires any going business or all or substantially all of the assets
   of any firm, corporation or limited liability company, or division
   thereof, whether through purchase of assets, merger or otherwise or
   (ii) directly or indirectly acquires (in one transaction or as the
   most recent transaction in a series of transactions) at least a
   majority (in number of votes) of the securities of a corporation which
   have ordinary voting power for the election of directors (other than
   securities having such power only by reason of the happening of a
   contingency) or a majority (by percentage of voting power) of the
   outstanding ownership  interests of a partnership or limited liability
   company.
                                          1
   <PAGE>

            "Adjusted Net Assets" shall have the meaning provided in Section
    10.7.

            "Affiliate" of any Person means any other Person directly or
   indirectly controlling, controlled by or under common control with
   such Person.  A Person shall be deemed to control another Person if
   the controlling Person owns 20% or more of any class of voting
   securities (or other ownership interests) of the controlled Person or
   possesses, directly or indirectly, the power to direct or cause the
   direction of the management or policies of the controlled Person,
   whether through ownership of stock, by contract or otherwise.  Any
   member of the Schwartz Group shall be deemed to be an Affiliate of the
   Company.

            "Agent" has the meaning ascribed to such term in the
   introduction to this Agreement.

            "Agreement" means this Senior Subordinated Credit Agreement
   dated as of September 30, 1999, as it may be amended, supplemented,
   restated or otherwise modified from time to time in accordance with
   the terms hereof.

            "Agreement Accounting Principles" means generally accepted
   accounting principles as in effect from time to time.

            "Applicable Margin" means, with respect to the Bridge Loan,
   6% for the period from and including the Closing Date and to but
   excluding the three month anniversary of the Closing Date, and for
   each subsequent Interest Period, the Applicable Margin in effect for
   the immediately preceding Interest Period plus 0.50%.

            "Applicable Treasury Rate" means, with respect to the date
   to which such Applicable Treasury Rate relates, the average of the
   annual yield rate of the three most actively traded U.S. Treasury
   securities having a remaining duration to maturity closest to maturity
   of the Rollover Bridge Loan as such rate is published under "Treasury
   Constant Maturities" in Federal Reserve Statistical Release H.15(519).


            "Asset Sale" means, with respect to any Person, the sale,
   conveyance, disposition or other transfer by such Person of any of its
   assets (including by way of a sale-leaseback transaction and including
   the sale or other transfer of any of the Equity Interests of any
   Subsidiary of such Person), other than the sale of inventory in the
   ordinary course of business and of obsolete or worn-out property in
   the ordinary course of business, the exchange or trade-in of equipment

                                      2
   <PAGE>

   and other assets for replacement assets and the granting of a
   nonexclusive license.  "Asset Sale" shall not include (i) any casualty
   to or condemnation of Property to which Section 6.6 of the Senior
   Secured Credit Agreement applies, whether the proceeds thereof are
   Excluded Proceeds (as defined in the Senior Secured Credit Agreement)
   or otherwise, or (ii) the sale, conveyance, disposition or other
   transfer by a Foreign Subsidiary of any of its assets to the extent
   that the Net Cash Proceeds thereof are invested in assets or Property
   (other than Cash Equivalent Investments) in any Foreign Subsidiary's
   business within twelve months after such sale, conveyance disposition
   or other transfer.

            "Bankruptcy Law" means Title 11 of the United States Code
   entitled "Bankruptcy", as now and hereafter in effect, or any
   successor statute or any other United States federal, state or local
   law or the law of any other jurisdiction relating to bankruptcy,
   insolvency, winding up, liquidation, reorganization  or relief of
   debtors, whether in effect on the date hereof or hereafter.

            "Board of Directors" means, as to any Person, the board of
   directors of such Person or any duly authorized committee of that
   Board.

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

            "BOCM" means Banc One Capital Markets, Inc.

            "Bridge Loan" means, collectively, the loans made by the
   Lenders pursuant to Section 2.1(a) and shall include any Junior
   Securities and PIK Interest Amount.

            "Bridge Loan Commitment" means the commitment of the Lenders
   to make the Bridge Loan as set forth in Section 2.1(a).

            "Bridge Notes" has the meaning ascribed to such term in
   Section 2.1(d).

            "Bridge Payment Date" has the meaning ascribed to such term
   in Section 2.3(b).

                                          3
   <PAGE>

            "Business Day" means any day excluding Saturday, Sunday and
   any day which is a legal holiday under the laws of New York and/or
   Illinois or is a day on which banking institutions therein located are
   authorized or required by law or other governmental action to close.

            "Capital Expenditures" means, without duplication, any
   expenditures for any purchase or other acquisition of any asset which
   would be classified as a fixed or capital asset on a consolidated
   balance sheet of the Company and its Subsidiaries prepared in
   accordance with Agreement Accounting Principles, excluding (i) the
   trade-in value of equipment or other assets exchanged for replacement
   assets, (ii) expenditures of insurance proceeds to rebuild or replace
   any asset after a casualty loss, (iii) the PSD Acquisition and (iv)
   Permitted Acquisitions.

            "Capitalized Lease" of a Person means any lease of Property
   by such Person as lessee which would be capitalized on a balance sheet
   of such Person prepared in accordance with Agreement Accounting
   Principles.

            "Capitalized Lease Obligations" of a Person means the amount
   of the obligations of such Person under Capitalized Leases which would
   be shown as a liability on a balance sheet of such Person prepared in
   accordance with Agreement Accounting Principles.

            "Cash Equivalent Investments" means (i) direct obligations
   issued or fully guaranteed by the United States of America or issued
   by any agency thereof and backed by the full faith and credit of the
   United States, in each case maturing within one year from the date of
   acquisition thereof, (ii) commercial paper rated A-1 or better by S&P
   or P-1 or better by Moody's, (iii) demand deposit accounts maintained
   in the ordinary course of business, (iv) certificates of deposit
   issued by and time deposits with commercial banks (whether domestic or
   foreign) having capital and surplus in excess of $100,000,000 and (v)
   mutual funds that invest solely in one or more of the types of
   investments described in clauses (i)-(iv) above; provided in each case
   that the same provides for payment of both principal and interest (and
   not principal alone or interest alone) and is not subject to any
   contingency regarding the payment of principal or interest.

            "Change in Control" means:

            (i)  any merger or consolidation of the Company with or into
   any Person or any sale, transfer or other conveyance, whether direct
   or indirect, of all or substantially all of the Company's assets, on a

                                          4
   <PAGE>

   consolidated basis, in one transaction or a series of related
   transactions, if, immediately after giving effect to such transac-
   tion(s), either (x) any "person" or "group" (other than a member of
   the Schwartz Group) is or becomes the "beneficial owner," directly or
   indirectly, of more than 40% of the Voting Equity Interests of the
   transferee(s) or surviving entity or entities, and the Schwartz Group
   shall cease to own beneficially at least a greater percentage of the
   Voting Equity Interests of the transferee(s) or surviving entity or
   entities or (y) the Schwartz Group shall cease to own beneficially (A)
   30% of the Voting Equity Interests of such transferee(s) or surviving
   entity or entities or (B) a greater percentage of the Voting Equity
   Interests of such transferee(s) or surviving entity or entities than
   any other person or group, whichever is less;

            (ii)  any "person" or "group" (other than a member of the
   Schwartz Group) is or becomes the "beneficial owner," directly or
   indirectly, of more than 40% of the Company's Voting Equity Interests,
   and the Schwartz Group shall cease to own beneficially at least a
   greater percentage of the Company's Voting Equity Interests;

            (iii)  the Continuing Directors cease for any reason to
   constitute a majority of the Company's Board of Directors then in
   office; or

            (iv)  the Company adopts a plan of liquidation or
   dissolution.

            "Change of Control Offer" has the meaning ascribed to such
   term in Section 2.5(d)(i).

            "Closing Date" means the date on or before November 1, 1999
   on which the initial Bridge Loan is made and the conditions set forth
   in Section 3.1 are satisfied or waived in accordance with Section
   13.5.

            "Commitment Letter" means the letter agreement dated June
   16, 1999 between the Company and FCCC, as amended from time to time,
   pursuant to which FCCC committed to provide the Bridge Loan to the
   Company.

            "Common Stock" of any Person means any and all shares,
   interests or other participations in, and other equivalents (however
   designated and whether voting or non-voting) of, such Person's common
   stock, whether outstanding on the Closing Date or issued after the
   Closing Date, and includes, without limitation, all series and classes
   of such common stock.

                                           5
   <PAGE>


            "Company" has the meaning ascribed to such term in the
   introduction to this Agreement.

            "Consolidated EBITDA" means, with reference to any period,
   Consolidated Net Income for such period plus, to the extent deducted
   from revenues in determining Consolidated Net Income (without
   duplication), (i) Consolidated Interest Expense and all non-cash
   interest expense, (ii) expense for income taxes paid or accrued, (iii)
   depreciation, (iv) amortization, (v) extraordinary losses incurred
   other than in the ordinary course of business and losses from
   discontinued operations, (vi) any extraordinary, unusual or non-
   recurring non-cash expenses or non-cash losses, and (vii) non-
   recurring cash charges, including any capitalized non-recurring cash
   charges, taken on or prior to March 31, 2000 resulting from severance,
   integration and other adjustments made as a result of the PSD
   Acquisition (provided that the amounts referred to in this clause
   (vii) shall not, in the aggregate, exceed $25,000,000), and minus, to
   the extent included in Consolidated Net Income, extraordinary gains
   and gains from discontinued operations, all net of tax, realized other
   than in the ordinary course of business, all calculated for the
   Company and its Subsidiaries on a consolidated basis for such period.

            "Consolidated Funded Indebtedness" means at any time,
   without duplication, the aggregate dollar amount of (i) Indebtedness
   (other than Rate Management Obligations and similar obligations under
   other Financial Contracts) of the Company and its Subsidiaries which
   has actually been funded and is outstanding at such time, whether or
   not such amount is due and payable at such time, plus (ii) undrawn
   amounts available under standby letters of credit, all calculated on a
   consolidated basis as of such time.

            "Consolidated Interest Expense" means, with reference to any
   period, the cash interest expense of the Company and its Subsidiaries
   calculated on a consolidated basis for such period.

            "Consolidated Net Income" means, with reference to any
   period, the net income (or loss) of the Company and its Subsidiaries
   calculated on a consolidated basis for such period.


            "Contingent Obligation" of a Person means any agreement,
   undertaking or arrangement by which such Person assumes, guarantees,
   endorses, contingently agrees to purchase or provide funds for the
   payment of, or otherwise becomes or is contingently liable upon, the
   Indebtedness of any other Person, or agrees to maintain the net worth
   or working capital or other financial condition of any other Person,

                                         6
   <PAGE>

   or otherwise assures any creditor of such other Person against loss,
   including, without limitation, any comfort letter or material
   take-or-pay contract.

            "Continuing Directors" means, during any period of 12
   consecutive months after the Closing Date, individuals who at the
   beginning of any such 12-month period constituted the Company's Board
   of Directors (together with any new directors whose election by such
   Board of Directors or whose nomination for election by the Company's
   shareholders was approved by a vote of a majority of the directors
   then still in office who were either directors at the beginning of
   such period or whose election or nomination for election was
   previously so approved, including new directors designated in or
   provided for in an agreement regarding the merger, consolidation or
   sale, transfer or other conveyance, of all or substantially all of the
   assets of the Company, if such agreement was approved by a vote of
   such majority of directors).

            "Controlled Group" means all members of a controlled group
   of corporations or other business entities and all trades or
   businesses (whether or not incorporated) under common control which,
   together with the Company or any of its Subsidiaries, are treated as a
   single employer under Section 414 of the Internal Revenue Code.

            "Default" means an event or condition the occurrence of
   which is, or with the lapse of time or the giving of notice or both
   would be, an Event of Default.

            "Dollars" or the sign "$" means the lawful money of the
   United States of America.

            "Domestic Lending Office" shall mean, as to any Lender, the
   office of such Lender designated as such on Annex I, or such other
   office designated by such Lender from time to time by written notice
   to the Agent and the Company.

            "Domestic Subsidiary" means a Subsidiary organized under the
   laws of the United States of America, any State thereof or the
   District of Columbia.


            "Eligible Assignee" means (A) (i) a commercial bank
   organized under the laws of the United States of America or any state
   thereof; (ii) a savings and loan association or savings bank organized
   under the laws of the United States or any state thereof; (iii) a
   commercial bank organized under the laws of any other country or a
   political subdivision thereof; provided that (x) such bank is acting
   through a branch or agency located in the United States or (y) such

                                         7
   <PAGE>

   bank is organized under the laws of a country that is a member of the
   Organization for Economic Cooperation and Development or a political
   subdivision of such country; and (iv) any other entity which is an
   "accredited investor" (as defined in Regulation D under the Securities
   Act of 1933) which extends credit or buys loans as one of its
   businesses including, but not limited to, insurance companies, mutual
   funds and lease financing companies, in each case (under clauses (i)
   through (iv) above) that is reasonably acceptable to the Agent and, so
   long as no Event of Default exists, the Company; and (B) any Lender
   and any Affiliate of any Lender.

            "Engagement Letter" means that engagement letter, dated as
   of June 16, 1999, between the Company and BOCM.

            "Environmental Laws" means any and all federal, state, local
   and foreign statutes, laws, judicial decisions, regulations,
   ordinances, rules, judgments, orders, decrees, plans, injunctions,
   permits, concessions, grants, franchises, licenses, agreements and
   other governmental restrictions relating to (i) the protection of the
   environment, (ii) the effect of the environment on human health, (iii)
   emissions, discharges or releases of pollutants, contaminants,
   hazardous substances or wastes into surface water, ground water or
   land, or (iv) the manufacture, processing, distribution, use,
   treatment, storage, disposal, transport or handling of pollutants,
   contaminants, hazardous substances or hazardous wastes or the clean-up
   or other remediation thereof.

            "Equity Interests" means (i) in the case of a corporation,
   common and preferred stock, (ii) in the case of a limited liability
   company, association or business entity, any and all shares,
   interests, participations, ownership or voting rights or other
   equivalents (however designated) of corporate stock, (iii) in the case
   of a partnership, partnership interests (whether general or limited)
   and (iv) any other interest or participation that confers on a Person
   the right to receive a share of the profits and losses of, or
   distributions of assets of, the issuing Person, in each case
   regardless of class or designation, and all warrants, options,
   purchase rights, conversion or exchange rights, voting rights, calls
   or claims of any character with respect thereto.

            "ERISA" means the Employee Retirement Income Security Act of
   1974, as amended from time to time, and any rule or regulation issued
   thereunder.

            "Escrow Agent" means Norwest Bank Minnesota, N.A., in its
   capacity as Escrow Agent under the Escrow Agreement, and its
   successors in such capacity.

                                      8
   <PAGE>

            "Escrow Agreement" means an escrow agreement among the
   Company, the Agent and the Escrow Agent, in substantially the form of
   Exhibit VII hereto, as amended, restated, supplemented or otherwise
   modified from time to time.

            "Eurodollar Lending Office" shall mean, as to any Lender,
   the office of such Lender designated as such on Annex I, or such other
   office designated by such Lender from time to time by written notice
   to the Agent and the Company.

            "Event of Default" means each of the events set forth in
   Section 7.

            "Exchange Act" means the Securities Exchange Act of 1934, as
   amended, and any successor statute or statutes thereto.

            "Exchange Notes" has the meaning ascribed to it in Section
   5.12(b).

            "Exchange Request" has the meaning ascribed to it in
   Section 5.12.

            "fair market value" means, with respect to any asset or
   property, the price which could be negotiated in an arm's-length, free
   market transaction, for cash, between a willing seller and a willing
   and able buyer, neither of whom is under undue pressure or compulsion
   to complete the transaction.  Fair market value shall be determined by
   the Board of Directors of the Company acting reasonably and in good
   faith and shall be evidenced by a Board Resolution of the Board of
   Directors of the Company delivered to the Agent.

            "FCCC" means First Chicago Capital Corporation.

            "Fee Letter" means that Amended and Restated Fee Letter
   dated September 17, 1999 between the Company, FCCC and BOCM.

            "Financial Contract" of a Person means (i) any exchange-
   traded or over-the-counter futures, forward, swap or option contract
   or other financial instrument with similar characteristics or (ii) any
   Rate Management Transaction.


            "Financing" means, with respect to any Person, the issuance
   or sale by such Person of any Equity Interests of such Person or any
   Indebtedness consisting of debt securities of such Person pursuant to
   a registered offering or private placement, but excluding the issuance
   or sale of (i) any Indebtedness permitted to be incurred pursuant to
   Section 6.2, (ii) Equity Interests by the Borrower to any officer,
   director or employee of the borrower or any of its Subsidiaries

                                        9
   <PAGE>

   pursuant to any incentive compensation plan or program and (iii)
   Equity Interests or Indebtedness by any Subsidiary of the Borrower to
   the Borrower or any Wholly-Owned Subsidiary of the Borrower.

            "Financing Requirement" means the consideration to be paid
   for the PSD Acquisition, the amount needed to repay certain of the
   Indebtedness of the Company and the Target outstanding on the Closing
   Date and the amount needed to pay the costs and expenses related to
   the Transactions.

            "Fiscal Year" means the fiscal year of the Company and each
   Guarantor for accounting and tax purposes, which for all years after
   the Closing Date shall end on December 31.

            "Foreign Subsidiary" means any Subsidiary that is not a
   Domestic Subsidiary.

            "fully diluted" means all the shares of Common Stock of the
   Company then outstanding or to be issued, calculated with respect to
   any Warrant Release Date as if all shares of Common Stock of the
   Company issuable upon conversion or exercise of any outstanding
   warrants (including the Warrants issued from escrow up to and
   including the most recent Warrant Release Date), options or similar
   rights (including upon conversion or exchange of convertible or
   exchangeable debt) are outstanding, and assuming that all options that
   may be granted under employee benefit plans for the benefit of the
   Company's employees are deemed to have been granted and exercised, and
   assuming that any other Common Stock of the Company issuable pursuant
   to any security, plan or arrangement of the Company (other than the
   Warrants) has been issued.

            "Funding Guarantor" shall have the meaning provided in
   Section 10.7.

            "GAAP" means generally accepted accounting principles as in
   effect from time to time in the United States of America.

            "Genetic Systems" means Genetic Systems Corporation, a
   Delaware corporation.


            "Governmental Authority" means any nation or government, any
   federal, state, local or other political subdivision thereof and any

                                        10
   <PAGE>

   entity exercising executive, legislative, judicial, regulatory or
   administrative functions of or pertaining to government.

            "Guarantee Obligations" shall have the meaning provided in
   Section 11.1.

            "Guarantees" means, collectively, the guarantees delivered
   to the Lenders by the Guarantors pursuant to Section 10 which are
   evidenced by notations of guarantee substantially in the form of
   Exhibit VI hereto.

            "Guarantor" means each of the Company's Domestic
   Subsidiaries which constitutes a Material Subsidiary that in the
   future executes a supplement or amendment to this Agreement in which
   such Subsidiary agrees to be bound by the terms of the Loan Documents
   as a Guarantor; provided that any Person constituting a Guarantor as
   described above shall cease to constitute a Guarantor when its
   respective Guarantee is released in accordance with the terms of the
   Loan Documents.  Notwithstanding the above, no direct or indirect
   Foreign Subsidiary of the Company will be considered a Guarantor.

            "Guarantor Junior Securities" means, with respect to a
   Guarantor, securities of such Guarantor subordinated to the Guarantor
   Senior Debt to the same extent as the Guarantee Obligations and which,
   in any case, do not mature or become subject to a mandatory redemption
   obligation prior to the one-year anniversary of the maturity of the
   Guarantor Senior Debt or of any securities distributed in any
   proceeding on account of the Guarantor Senior Debt.

            "Guarantor Payment Blockage Period" shall have the meaning
   provided in Section 11.2.

            "Guarantor Senior Debt" means the Senior Debt of a
   Guarantor.

            "Incur" means, with respect to any Indebtedness or other
   obligation of any Person, to create, issue, incur (by conversion,
   exchange or otherwise), assume, guarantee or otherwise become liable
   in respect of such Indebtedness or other obligation or the recording,
   as required pursuant to GAAP or otherwise, of any such Indebtedness or
   other obligation on the balance sheet of such Person (and
   "Incurrence," "Incurred," "Incurrable" and "Incurring" shall have
   meanings correlative to the foregoing); provided, however, that any
   amendment, modification or waiver of any document pursuant to which
   Indebtedness was previously Incurred shall only be deemed to be an
   Incurrence of Indebtedness if and to the extent such amendment,

                                     11
   <PAGE>

   modification or waiver (i) increases the principal thereof or interest
   rate or premium payable thereon or (ii) changes to an earlier date the
   stated maturity thereof or the date of any scheduled or required
   principal payment thereon or the time or circumstances under which
   such Indebtedness shall be redeemed; provided, further, that any
   Indebtedness of a Person existing at the time such Person becomes
   (after the Closing Date) a Subsidiary of the Company (whether by
   merger, consolidation, acquisition or otherwise) shall be deemed to be
   Incurred by such Subsidiary at the time it becomes a Subsidiary of the
   Company.

            "Indebtedness" of a Person means, without duplication, such
   Person's (i) obligations for borrowed money, (ii) obligations
   representing the deferred purchase price of Property or services
   (other than accounts payable arising in the ordinary course of such
   Person's business payable on terms customary in the trade), (iii)
   obligations which are evidenced by notes, acceptances, or other
   instruments, (iv) obligations of such Person to purchase securities or
   other Property arising out of or in connection with the sale of the
   same or substantially similar securities or Property, (v) Capitalized
   Lease Obligations, (vi) reimbursement obligations with respect to
   standby letters of credit, whether drawn or undrawn, (vii) Rate
   Management Obligations, (viii) Off-Balance Sheet Liabilities, (ix) all
   liabilities and obligations of the type described in the preceding
   clauses (i) through (viii) of any other Person that such Person has
   assumed or guaranteed or that are secured by a Lien on any Property of
   such Person (provided that if any such liability or obligation of such
   other Person is not the legal liability of such Person, the amount
   thereof shall be deemed to be the lesser of (1) the actual amount of
   such liability or obligation and (2) the book value of such Person's
   Property security such liability or obligation, and (x) any other
   obligation for borrowed money or other financial accommodation which
   in accordance with Agreement Accounting Principles would be shown as a
   liability on the consolidated balance sheet of such Person.

            "indemnified liabilities" has the meaning ascribed to such
   term in Section 13.3.

            "Indemnitees" has the meaning ascribed to such term in
   Section 13.3.

            "Interest Period" means, for each Bridge Note, the period
   commencing on the Closing Date and ending on the immediately
   succeeding Bridge Payment Date, and, thereafter, each subsequent
   period commencing on the last day of the immediately preceding
   Interest Period and ending on the immediately succeeding Bridge
   Payment Date.

                                      12
   <PAGE>

            "Interest Rate Determination Date" means, with respect to
   any Interest Period, the second Business Day on which banks in Chicago
   and London are open prior to the first Business Day of such Interest
   Period.

            "Internal Revenue Code" means the Internal Revenue Code of
   1986, as amended from time to time, and any successor code or statute.

            "Investment" of a Person means any loan, advance (other than
   commission, travel and similar advances to officers and employees made
   in the ordinary course of business), extension of credit (other than
   accounts or notes receivable arising in the ordinary course of
   business on terms customary in the trade) or contribution of capital
   by such Person; stocks, bonds, mutual funds, partnership interests,
   notes, debentures or other securities (other than treasury stock)
   owned by such Person; any deposit accounts and certificate of deposit
   owned by such Person; and structured notes, derivative financial
   instruments and other similar instruments or contracts owned by  such
   Person.  Payment by a Person under a guaranty by such Person of
   Indebtedness of another Person shall be deemed to be an Investment by
   such Person in such other Person in the amount of such payment.

            "Junior Securities" means securities of the Company
   subordinated to the Senior Debt to the same extent as the Obligations
   and which, in any case, do not mature or become subject to a mandatory
   redemption obligation prior to the one-year anniversary of the
   maturity of the Senior Debt or of any securities distributed in any
   proceeding on account of the Senior Debt.

            "Lenders" has the meaning ascribed to that term in the
   introduction to this Agreement and shall include any assignee of any
   Loan, Note or Loan Commitment to the extent of such assignment.

            "Leverage Ratio" means, as of any date of calculation, the
   ratio of (i) Consolidated Funded Indebtedness outstanding on such date
   to (ii) Consolidated EBITDA for the Company's then most-recently ended
   four fiscal quarters.


            "LIBO Base Rate" shall mean, with respect to each day during
   an Interest Period, the rate per annum (rounded upwards, if necessary,
   to the nearest 1/16th of 1%) appearing on Telerate Page 3750 (or any
   successor page) as the London interbank offered rate for deposits in
   Dollars at approximately 11:00 a.m. (London time) two Business Days
   prior to the first day of such Interest Period for a term comparable
   to such Interest Period.  If for any reason such rate is not
   available, the term "LIBO Base Rate" shall mean, with respect to each

                                      13
   <PAGE>

   day during an Interest Period, the rate per annum (rounded upwards, if
   necessary, to the nearest 1/100 of 1%) appearing on Reuters Screen
   LIBO Page as the London interbank offered rate for deposits in Dollars
   at approximately 11:00 a.m. (London time) two Business Days prior to
   the first day of such Interest Period for a term comparable to such
   Interest Period; provided, however, if more than one rate is specified
   on Reuters Screen LIBO Page, the applicable rate shall be the
   arithmetic mean of all such rates (rounded upwards, if necessary, to
   the nearest 1/100 of 1%).  In the event that neither of such rates is
   available, the Agent shall refer to the alternative rate set forth in
   Section 2.7(a).

            "LIBO Rate" shall mean with respect to each day during an
   Interest Period for the Bridge Loan, a rate per annum determined for
   such day in accordance with the following formula (rounded upwards to
   the nearest whole multiple of one-sixteenth of one percent):

            LIBO Base Rate
            ---------------------
            1.00 - LIBOR Reserve Requirements

            "LIBOR Reserve Requirements" shall mean, with respect to
   each day during an Interest Period for the Bridge Loan, that
   percentage (expressed as a decimal) which is in effect on such day, as
   prescribed by the Federal Reserve Board or other governmental
   authority or agency having jurisdiction with respect thereto for
   determining the maximum reserves (including, without limitation,
   basic, supplemental, marginal and emergency reserves) for eurocurrency
   funding (currently referred to as "Eurocurrency Liabilities" in
   Regulation D) maintained by a member bank of the Federal Reserve
   System.

            "Lien" means any lien (statutory or other), mortgage,
   pledge, hypothecation, assignment, deposit arrangement, encumbrance or
   preference, priority or other security agreement or preferential
   arrangement of any kind or nature whatsoever (including, without
   limitation, the interest of a vendor or lessor under any conditional
   sale, Capitalized Lease or other title retention agreement).

            "Loan Commitment" means the Bridge Loan Commitment and the
   Rollover Bridge Loan Commitment.

            "Loan Documents" means this Agreement, the Bridge Notes, the
   Rollover Bridge Notes,  the Note Documents, the Registration
   Statement, the Warrants and the Escrow Agreement.

                                     14
   <PAGE>


            "Loans" means the Bridge Loan and the Rollover Bridge Loan
   as each may be outstanding.

            "Loan Parties" means the Company and any Guarantor.

            "Margin Stock" has the meaning assigned to that term in
   Regulation U of the Board of Governors of the Federal Reserve System
   as in effect from time to time.

            "Material Adverse Effect" means a material adverse effect on
   (i) the business, Property, condition (financial or otherwise) or
   results of operations of the Company and its Subsidiaries taken as a
   whole, (ii) the ability of the Company and the Guarantors collectively
   to perform their obligations under the Loan Documents, or (iii) the
   validity or enforceability of any of the Loan Documents or the rights
   or remedies of the Agent or the Lenders thereunder.

            "Material Domestic Subsidiary" means any Domestic
   Subsidiary having assets (other than non-U.S. domiciled assets and
   Equity Interests in Foreign Subsidiaries) with a book value of
   $10,000,000 or more or any group of Domestic Subsidiaries on a
   combined basis having such assets with a book value of $15,000,000 or
   more.

            "Material Indebtedness" is defined in Section 7.1(e).

            "Material Subsidiary" means any Subsidiary, or group of
   Subsidiaries on a combined basis, that constitutes a Substantial
   Portion of the Property of the Company and its Subsidiaries.

            "Maturity Date" means the one year anniversary of the
   Closing Date.

            "Maximum Cash Interest Rate" means an interest rate of 14%
   per annum; provided that in computing such interest rate, fees paid to
   the Lenders shall not be deemed an interest payment.

            "Moody's" mean Moody's Investors Service, Inc.

            "Multiemployer Plan" means a Plan which is a multiemployer
   plan as defined in Section 4001(a)(3) of ERISA and to which the
   Company or any member of the Controlled Group is obligated to make
   contributions.

                                      15
   <PAGE>


            "Net Cash Proceeds" means, with respect to any Asset Sale or
   Financing by any Person or the issuance of the Permanent Securities,
   (a) cash received by such Person or any Subsidiary of such Person from
   such Asset Sale (including cash received as consideration for the
   assumption or incurrence of liabilities incurred in connection with or
   in anticipation of such Asset Sale) or Financing or the issuance of
   the Permanent Securities, after (i) provision for all income or other
   taxes measured by or resulting from such Asset Sale or Financing or
   the issuance of the Permanent Securities, (ii) payment of all
   brokerage commissions and other fees and expenses related to such
   Asset Sale or Financing or the issuance of the Permanent Securities,
   (iii) repayment of Indebtedness secured by a Lien on any asset
   disposed of in such Asset Sale, (iv) deduction of appropriate amounts
   to be provided by such Person or a Subsidiary of such Person as a
   reserve, in accordance with Agreement Accounting Principles, against
   any liabilities associated with the assets sold or disposed of in such
   Asset Sale and retained by such Person or a Subsidiary of such Person
   after such Asset Sale, including, without limitation, liabilities
   related to environmental matters, or against any indemnification
   obligations associated with the assets sold or disposed of in such
   Asset Sale, and (v) in the case of a sale of a facility, the costs of
   relocating the operations of the Borrower and its Subsidiaries from
   that facility; and (b) cash payments in respect of any Indebtedness,
   Equity Interest or other consideration received by such Person or any
   Subsidiary of such Person from such Asset Sale upon receipt of such
   cash payments by such Person or such Subsidiary.

            "Non-Payment Default" means any event (other than a Payment
   Default) the occurrence of which entitles one or more Persons to act
   to accelerate the maturity of any Senior Debt.

            "Note Documents" means the Exchange Notes, the Permanent
   Securities, the Senior Subordinated Indenture, the indenture governing
   the Permanent Securities and any guarantee related thereto.

            "Notes" means, collectively, the Bridge Notes and the
   Rollover Bridge Notes.

            "Notice of Borrowing" means a notice substantially in the
   form of Exhibit IV-A annexed hereto with respect to a proposed
   borrowing.

            "Obligations" means all obligations of every nature of the
   Company from time to time owed to the Lenders and the Agent under the
   Loan Documents, whether for principal, premiums, reimbursements,

                                      16
   <PAGE>

   interest, fees, expenses, indemnities or otherwise, and whether
   primary, secondary, direct, indirect, contingent, fixed or otherwise
   (including obligations of performance).

            "Off-Balance Sheet Liability" of a Person means (i) any
   repurchase obligation or recourse liability of such Person with
   respect to the collectibility of accounts or notes receivable sold by
   such Person, (ii) any liability under any Sale and Leaseback
   Transaction which is not a Capitalized Lease, (iii) any liability
   under any so-called "synthetic lease" transaction entered into by such
   Person, or (iv) any obligation arising with respect to any other
   transaction which is the functional equivalent of borrowing but which
   does not constitute a liability on the balance sheet of such Person,
   but excluding from this clause (iv) any lease of Property (other than
   a Capitalized Lease) by such Person as lessee which has an original
   term (including any required renewals and any renewals effective at
   the option of the lessor) of one year or more.

            "Offer Payment Date" has the meaning ascribed to such term
   in Section 2.5(d)(iii).

            "Officer" means, with respect to any Person, the Chairman of
   the Board, the President, any Vice President, the Chief Financial
   Officer, the Controller, the Treasurer or the Secretary of such
   Person.

            "Officers' Certificate" means, as applied to any
   corporation, a certificate executed on behalf of such corporation by
   two Officers; provided, however, that every Officers' Certificate with
   respect to the compliance with a condition precedent to the making of
   the Loans hereunder shall include (i) a statement that the officer or
   officers making or giving such Officers' Certificate have read such
   condition and any definitions or other provisions contained in this
   Agreement relating thereto, (ii) a statement that, in the opinion of
   the signers, they have made or have caused to be made such examination
   or investigation as is necessary to enable them to express an informed
   opinion as to whether or not such condition has been complied with,
   and (iii) a statement as to whether, in the opinion of the signers,
   such condition has been complied with.

            "Original Bridge Notes" has the meaning ascribed to such
   term in Section 2.1(d).

            "Original Rollover Bridge Notes" has the meaning ascribed to
   such term in Section 2.2(e).

                                       17

   <PAGE>

            "Payment Blockage Period" has the meaning ascribed to such
   term in Section 8.2(b).

            "Payment Default" means any default in the payment of
   principal, premium, if any, or interest on any Senior Debt beyond any
   applicable grace period with respect thereto.

            "Payment Office" shall mean the office of the Agent located
   at 1 Bank One Plaza, Chicago, Illinois 60670 or such other office as
   the Agent may designate to the Company and the Lenders from time to
   time.

            "PBGC" means the Pension Benefit Guaranty Corporation, or
   any successor thereto.

            "Permanent Securities" means any Securities of the Company
   and/or the Guarantors, the proceeds of which are used to repay the
   Notes in full.  If the Permanent Securities consist of debt
   Securities, such Permanent Securities shall be governed by an
   indenture or other instrument which contains covenants, events of
   default and subordination provisions substantially similar to those
   described in the "Description of Notes" set forth in the September 15,
   1999 draft of the Company's Preliminary Offering Memorandum with
   respect to $125,000,000 in principal amount of __% Senior Subordinated
   Notes due 2009.

            "Permitted Acquisition" means any Acquisition made by the
   Company or any of its Subsidiaries, provided that (i) as of the date
   of the consummation of such Acquisition, no Default or Event of
   Default shall have occurred and be continuing or would result from
   such Acquisition, and the representation and warranty contained in
   Section 4.11 shall be true both before and after giving effect to such
   Acquisition, (ii) such Acquisition is consummated on a non-hostile
   basis pursuant to a negotiated acquisition agreement approved by the
   board of directors or other applicable governing body of the seller or
   entity to be acquired, and no material challenge to such Acquisition
   (excluding the exercise of appraisal rights) shall be pending or
   threatened by any shareholder or director of the seller or entity to
   be acquired, (iii) the business to be acquired in such Acquisition is
   reasonably related to one or more of the fields of enterprise in which
   the Company and its Subsidiaries are engaged on the Closing Date
   (after giving effect to the PSD Acquisition), (iv) as of the date of
   the consummation of such Acquisition, all material approvals required
   in connection therewith shall have been obtained, and (v) from the
   period beginning on the Closing Date and ending on the date the Bridge
   Notes are exchanged for Rollover Notes, as of the date of the

                                     18
   <PAGE>

   consummation of such Acquisition, the Company shall be in compliance
   with the financial covenants contained in the Senior Secured Credit
   Agreement as in effect on the Closing Date, both prior to and after
   giving effect to such Acquisition.

            "Person" means any natural person, corporation, firm, joint
   venture, partnership, limited liability company, association,
   enterprise, trust or other entity or organization, or any government
   or political subdivision or any agency, department or instrumentality
   thereof.

            "PIK Interest Amount" has the meaning ascribed to such term
   in Section 2.3(b).

            "Plan" means an employee pension benefit plan which is
   covered by Title IV of ERISA or subject to the minimum funding
   standards under Section 412 of the Internal Revenue Code as to which
   the Company or any member of the Controlled Group could reasonably be
   expected to incur any liability.

            "Prepayment Date" has the meaning set forth in Section
   2.5(c).

            "Property" of a Person means any and all property, whether
   real, personal, tangible, intangible, or mixed, of such Person, or
   other assets owned, leased or operated by such Person, including,
   without limitation, Equity Interests of Subsidiaries of such Person.

            "PSD Acquisition" means the acquisition by the Company of
   the outstanding capital stock of the Target and certain related assets
   (the "Acquired Business") pursuant to the PSD Purchase Agreement.

            "PSD Purchase Agreement" means the Purchase Agreement dated
   July 3, 1999 among the Company, Sanofi Synthelabo and Institut
   Pasteur.

            "Rate Management Transaction" means any transaction
   (including an agreement with respect thereto) now existing or
   hereafter entered into for bona fide hedging purposes (and not for
   speculative purposes), which is a rate swap, basis swap, forward rate
   transaction, commodity swap, commodity option, equity or equity index
   swap, equity or equity index option, bond option, interest rate
   option, foreign exchange transaction, cap transaction, floor
   transaction, collar transaction, forward transaction, currency swap
   transaction, cross-currency rate swap transaction, currency option or
   any other similar transaction (including any option with respect to
   any of these transactions) or any combination thereof, whether linked

                                      19
   <PAGE>

   to one or more interest rates, foreign currencies, commodity prices,
   equity prices or other financial measures.

            "Rate Management Obligations" of a Person means any and all
   obligations of such Person, whether absolute or contingent and
   howsoever and whensoever created, arising, evidenced or acquired
   (including all renewals, extensions and modifications thereof and
   substitutions therefor), under (i) any and all Rate Management
   Transactions, and (ii) any and all cancellations, buy backs,
   reversals, terminations or assignments of any Rate Management
   Transactions.

            "Refinance" means, in respect of any security or
   Indebtedness, to refinance, extend, renew, refund, repay, prepay,
   redeem, defease or retire, or to issue a security or Indebtedness in
   exchange or replacement for, such security or Indebtedness in whole or
   in part.  "Refinanced" and "Refinancing" shall have correlative
   meanings.

            "Register" has the meaning ascribed to such term in Section
   13.20.

            "Registration Statement" means a registration statement of
   the Company and the Guarantors with respect to the Exchange Notes,
   including the Prospectus, amendments and supplements to such
   Registration Statement, including post-effective amendments, all
   exhibits and all material incorporated by reference in such
   Registration Statement.

            "Related Documents" means the PSD Purchase Agreement and
   each of the other agreements contemplated by the Commitment Letter or
   the Fee Letter other than the Loan Documents and the Senior Secured
   Credit Agreement.

            "Reportable Event" means a reportable event as defined in
   Section 4043 of ERISA and the regulations issued under such section,
   with respect to a Plan, excluding, however, such events as to which
   the PBGC has by regulation waived the requirement of Section 4043(a)
   of ERISA that it be notified within 30 days of the occurrence of such
   event, provided, however, that a failure to meet the minimum funding
   standard of Section 412 of the Internal Revenue Code and of Section
   302 of ERISA shall be a Reportable Event regardless of the issuance of
   any such waiver of the notice requirement in accordance with either
   Section 4043(a) of ERISA or Section 412(d) of the Internal Revenue
   Code.

            "Representative" means the indenture trustee or other
   trustee, agent or representative in respect of any Senior Debt;
   provided that if, and for so long as, any Senior Debt lacks such a

                                      20
   <PAGE>

   representative, then the Representative for such Senior Debt shall at
   all times constitute the holders of a majority in outstanding
   principal amount of such Senior Debt in respect of any Senior Debt.

            "Required Lenders" means Lenders holding in the aggregate
   more than 50% of the outstanding principal amount of Notes.

            "Rollover Bridge Loan Commitment" has the meaning ascribed
   to such term in Section 2.2(a).

            "Rollover Bridge Notes" has the meaning ascribed to such
   term in Section 2.2(c).

            "Rollover Bridge Loan Rate" means, for the period from and
   including the Maturity Date and to but excluding the three-month
   anniversary of the Maturity Date, a rate of interest per annum equal
   to the greater of (i) 14%, (ii) the Applicable Treasury Rate on the
   Maturity Date plus 5.25%, and (iii) the rate of interest on the Bridge
   Loan in effect on the Maturity Date.  For each subsequent three month
   period the Rollover Bridge Loan Rate means the Rollover Bridge Loan
   Rate in effect for the immediately preceding three month period plus
   0.50%.

            "Rollover Loan" has the meaning ascribed to such term in
   Section 2.2(a).

            "Rollover Notice" means a notice substantially in the form
   of Exhibit IV-B annexed hereto with respect to a proposed conversion.

            "S&P" means Standard and Poor's Ratings Services, a division
   of The McGraw Hill Companies, Inc.

            "Sale and Leaseback Transaction" means any sale or other
   transfer of Property by any Person with the intent to lease such
   Property as lessee.

            "Schwartz Group" means David and Alice Schwartz, their
   family and heirs, and corporations, partnerships and limited liability
   companies 100% owned by any of the foregoing and trusts for the
   benefit of any of the foregoing.

            "Securities" means any stock, shares, partnership interests,
   voting trust certificates, certificates of interest or participation
   in any profit sharing agreement or arrangement, bonds, debentures,
   options, warrants, notes, or other evidences of indebtedness, secured

                                      21
   <PAGE>

   or unsecured, convertible, subordinated or otherwise, or in general
   any instruments commonly known as "securities" or any certificates of
   interest, shares or participations in temporary or interim
   certificates for the purchase or acquisition of, or any right to
   subscribe to, purchase or acquire, any of the foregoing.

            "Securities Act" means the Securities Act of 1933, as
   amended, and any successor statute or statutes thereto.

            "Senior Debt" means up to $220 million of the following: the
   principal of, premium, if any, and interest (including any interest
   accruing subsequent to an event specified in Section 7.1(f) or Section
   7.1(g) hereof at the rate provided for in the documentation governing
   such Senior Debt, whether or not such interest is an allowed claim
   under applicable law) on, and all other obligations (including
   reimbursements, fees, expenses, indemnities or otherwise, and whether
   primary, secondary, direct, indirect, contingent, fixed or otherwise)
   with respect to (i) all Indebtedness under or in respect of the Senior
   Secured Credit Agreement and any guaranty of any Indebtedness under or
   in respect of the Senior Secured Credit Agreement and (ii) all Rate
   Management Transactions and any cancellation, buyback, reversal,
   termination or assignment of any Rate Management Transaction.

            "Senior Financing" means the initial borrowing by the
   Company under the Senior Secured Credit Agreement to finance a portion
   of the Financing Requirement.

            "Senior Officers" means each of the Chief Executive Officer,
   Chief Financial Officer and Chief Operating Officer of the Company.

            "Senior Secured Credit Agreement" means the Credit Agreement
   dated as of September 30, 1999, among Bio-Rad Laboratories, Inc., the
   lenders party thereto in their capacities as lenders thereunder, Bank
   One, NA, as agent, ABN Amro Bank N.V., as syndication agent, and Union
   Bank of California, as documentation agent, together with the related
   documents thereto (including, without limitation, any guarantee
   agreements and security documents), in each case as such agreements
   may be amended (including any amendment and restatement thereof),
   supplemented, replaced, refinanced or otherwise modified from time to
   time, including any agreement extending the maturity of, refinancing,
   replacing or otherwise restructuring (including increasing the amount
   of available borrowings thereunder (provided that such increase in
   borrowings is permitted by Section 6.2 hereof) or adding or deleting
   Subsidiaries as additional borrowers or guarantors thereunder) all or

                                     22
   <PAGE>

   any portion of the Indebtedness under such agreement or any successor
   or replacement agreement and whether by the same or any other agent,
   lender or group of lenders.

            "Senior Subordinated Indenture" means an indenture, under
   which the Exchange Notes will be issued, that complies with the Trust
   Indenture Act of 1939 between the Company and a trustee conforming to
   the terms and conditions of the Rollover Loan (except as described
   below) and containing such other terms and conditions typical for
   publicly traded high yield debt securities.  The covenants, events of
   default and subordination provisions of the Senior Subordinated
   Indenture shall be substantially similar to those described in the
   "Description of Notes" set forth in the September 15, 1999 draft of
   the Company's Preliminary Offering Memorandum with respect to
   $125,000,000 in principal amount of __% Senior Subordinated Notes due
   2009.  The Senior Subordinated Indenture shall have mandatory
   redemption provisions typical for publicly traded high yield debt
   securities.  The Exchange Notes shall initially bear interest at the
   Rollover Bridge Loan Rate.  For so long as the Exchange Notes bear
   interest at an increasing rate of interest, the Exchange Notes will be
   redeemable at the option of the Company, in whole or in part at any
   time, at par plus accrued and unpaid interest to the redemption date.
    Each holder of the Exchange Notes shall have the option to fix the
   interest rate on the Exchange Notes at a rate that is equal to the
   then applicable rate of interest borne by the Exchange Notes (but in
   no event in excess of 16% per annum).  The Maximum Cash Interest Rate
   shall apply to the Exchange Notes, with all interest in excess of the
   Maximum Cash Interest Rate payable at the option of the Company in
   additional Exchange Notes.  In such event, such Exchange Notes will be
   noncallable until the third anniversary of the Closing Date and will
   be callable thereafter at par plus accrued interest plus a premium
   equal to one-half of the coupon in effect on the date on which the
   interest rate was fixed declining ratably to par on the date that is
   one year prior to maturity of the Exchange Notes. The trustee shall be
   appointed by the Company and shall be acceptable to the Lenders
   receiving the Exchange Notes.  The bank or trust company acting as
   trustee under the Senior Subordinated Indenture shall at all times be
   a corporation organized and doing business under the laws of the
   United States of America or the State of New York, in good standing
   and having its principal offices in the Borough of Manhattan, in The
   City of New York, which is authorized under such laws to exercise
   corporate trust powers and is subject to supervision or examination by
   Federal or State authority and which has a combined capital and
   surplus of not less than $50,000,000.

                                     23
   <PAGE>

            "Single Employer Plan" means a Plan (other than a
   Multiemployer Plan) maintained by the Company or any member of the
   Controlled Group for employees of the Company or any member of the
   Controlled Group.

            "Subordinated Indebtedness" means Indebtedness of the
   Company or any Guarantor which is expressly subordinated in right of
   payment to the Notes or the Guarantee of such Guarantor, as the case
   may be.

            "Subsequent Bridge Note" has the meaning ascribed to such
   term in Section 2.1(d).

            "Subsequent Rollover Bridge Note" has the meaning ascribed
   to such term in Section 2.2(c).

            "Subsidiary" of a Person means (i) any corporation more than
   50% of the outstanding securities having ordinary voting power of
   which shall at the time be owned or controlled, directly or
   indirectly, by such Person or by one or more of its Subsidiaries or by
   such Person and one or more of its Subsidiaries, or (ii) any
   partnership, limited liability company, association, joint venture or
   similar business organization more than 50% of the ownership interests
   having ordinary voting power of which shall at the time be so owned or
   controlled.  Unless otherwise expressly provided, all references
   herein to a "Subsidiary" shall mean a Subsidiary of the Company.

            "Substantial Portion" means, with respect to the Property of
   the Company and its Subsidiaries, Property which (i) represents more
   than 10% of the consolidated assets of the Company and its
   Subsidiaries as shown in the consolidated financial statements of the
   Company and its Subsidiaries as at the end of the four fiscal quarter
   period ending immediately prior to the fiscal quarter in which such
   determination is made, or (ii) is responsible for more than 10% of the
   consolidated net income of the Company and its Subsidiaries as
   reflected in the financial statements referred to in clause (i) above.

             "Synthetic Lease" is defined in Section 6.2(h).

             "Target" means Pasteur Sanofi Diagnostics S.A.

             "Taxes" has the meaning ascribed to such term in Section 2.10.

                                     24
   <PAGE>

            "Transactions" means the PSD Acquisition, the Senior
   Financing, the borrowings of the Loans and the repayment of certain of
   the outstanding Indebtedness of the Company and the Target.

            "Tribunal" means any government, any arbitration panel, any
   court or any governmental department, commission, board, bureau,
   agency, authority or instrumentality of the United States or any
   state, province, commonwealth, nation, territory, possession, county,
   parish, town, township, village or municipality, whether now or
   hereafter constituted and/or existing.

            "Unfunded Liabilities" means the amount (if any) by which
   the present value of all vested and unvested accrued benefits under
   all Single Employer Plans exceeds the fair market value of all such
   Plan assets allocable to such benefits, all determined as of the then
   most recent valuation date for such Plans using PBGC actuarial
   assumptions for single employer plan terminations.

            "U.S. Legal Tender" means such coin or currency of the
   United States of America as at the time of payment shall be legal
   tender for the payment of public and private debts.

            "Voting Equity Interests" means Equity Interests which at
   the time are entitled to vote in the election of, as applicable,
   directors, members or partners generally.

            "Warrant Agreement" means a warrant agreement in
   substantially the form of Exhibit VIII hereto, duly executed by each
   Lender and the Company, relating to the Warrants.

            "Warrants" means warrants, registered in blank, represented
   by one or more warrant certificates in substantially the form attached
   to the Warrant Agreement as a "Formula Warrant Certificate" or the
   form attached to the Warrant Agreement as a "Release Warrant
   Certificate", as applicable, each representing the right to buy one
   share of the Company's Class A Common Stock at an exercise price equal
   to 10% over the last quoted sales price of the Company's Common Stock
   on the American Stock Exchange on the Closing Date and in the
   aggregate representing the right to buy up to 10% of the "fully-
   diluted" Common Stock of the Company for a period of 10 years
   following the Closing Date.

                                    25
   <PAGE>

            "Warrant Release Date" shall mean the Business Day after the
   date on which BOCM delivers a Warrant Release Request (or any later
   date specified in such Warrant Release Request).

            "Warrant Release Request" means a written notice to the
   Escrow Agent and the Company signed by a duly authorized officer of
   BOCM (i) stating that (a) a specified portion of the Warrants are
   necessary for the sale of the Permanent Securities as set forth in
   Section 12(a) or (b) that the Lenders have become entitled to a
   specified portion of the Warrants as set forth in Section 12(b), and
   (ii) requesting that such specified portion of the Warrants be
   released to BOCM for such purpose or to the Lenders, as applicable,
   and (iii) specifying the names and denominations in which the Warrants
   will be issued and the time of such issuance.

            "Wholly Owned Subsidiary" of any Person means any Subsidiary
   of such Person of which all the outstanding voting securities (other
   than in the case of a Foreign Subsidiary, directors' qualifying shares
   or an immaterial amount of shares required to be owned by other
   Persons pursuant to applicable law) are owned by such Person or any
   Wholly Owned Subsidiary of such Person.  Unless otherwise specified,
   all references to a "Wholly Owned Subsidiary" shall mean a Wholly
   Owned Subsidiary of the Company.

            "Year 2000 Issues" means anticipated costs, problems and
   uncertainties associated with the inability of certain computer
   applications (whether of the Company, any of its Subsidiaries, or any
   of the Company's or any of its Subsidiaries' material customers,
   suppliers or vendors) to effectively handle data including dates on
   and after January 1, 2000, as such inability affects the business,
   operations and financial condition of the Company and its
   Subsidiaries.

            "Year 2000 Program" is defined in Section 4.19.

            1.2  Accounting Terms.  For the purposes of this Agreement,
   all accounting terms not otherwise defined herein shall have the
   meanings assigned to them in conformity with GAAP.

            1.3  Other Definitional Provisions; Anniversaries.  Any of the
   terms defined in Section 1.1 may, unless the context otherwise requires,
   be used in the singular or the plural depending on the reference.  For
   purposes of this Agreement, a monthly anniversary of the Closing Date
   shall occur on the same day of the applicable month as the day of the
   month on which the Closing Date occurred; provided, however, that if
   the applicable month has no such day (i.e., 29, 30 or 31), the monthly

                                      26
   <PAGE>

   anniversary shall be deemed to occur on the last day of the applicable
   month.


   SECTION 2.  AMOUNT AND TERMS OF LOAN COMMITMENT AND LOANS; NOTES

            2.1 Bridge Loan and Bridge Note.

           (a)  Bridge Loan Commitment.  Subject to the terms and
   conditions of this Agreement and in reliance upon the representations
   and warranties of the Company herein set forth, the Lenders hereby
   agree to lend to the Company on the Closing Date $100,000,000.00 (one
   hundred million dollars) in the aggregate (the "Bridge Loan"), each
   such Lender committing, severally and not jointly, to lend the amount
   set forth next to such Lender's name on the signature pages hereto.
   The Lenders' commitments to make the Bridge Loan to the Company
   pursuant to this Section 2.1(a) are herein called individually, a
   "Bridge Loan Commitment" and collectively, the "Bridge Loan
   Commitments."

           (b)  Notice of Borrowing.  When the Company desires to
   borrow under this Section 2.1, it shall deliver to the Agent a Notice
   of Borrowing no later than 11:00 A.M. (Chicago time), at least three
   Business Days in advance of the Closing Date or such later date as
   shall be agreed to by the Agent.  The Notice of Borrowing shall
   specify the applicable date of borrowing (which shall be a Business
   Day).  Upon receipt of such Notice of Borrowing, the Agent shall
   promptly notify each Lender of its share of the Bridge Loan and the
   other matters covered by the Notice of Borrowing.

           (c)  Disbursement of Funds.  No later than 12:00 Noon
   (Chicago time) on the Closing Date, each Lender will make available
   its pro rata share of the Bridge Loan requested to be made on such
   date in the manner provided below.  All amounts shall be made
   available to the Agent in U.S. Legal Tender and immediately available
   funds at the Payment Office and the Agent promptly will make available
   to the Company by depositing to its account at the Payment Office the
   aggregate of the amounts so made available in the type of funds
   received.  Unless the Agent shall have been notified by any Lender
   prior to the Closing Date that such Lender does not intend to make
   available to the Agent its portion of the Bridge Loan to be made on
   such date, the Agent may assume that such Lender has made such amount
   available to the Agent on such date, and the Agent, in reliance upon
   such assumption, may (in its sole discretion and without any
   obligation to do so) make available to the Company a corresponding
   amount.  If such corresponding amount is not in fact made available to

                                       27
   <PAGE>

   the Agent by such Lender and the Agent has made available same to the
   Company, the Agent shall be entitled to recover such corresponding
   amount from such Lender.  If such Lender does not pay such
   corresponding amount forthwith upon the Agent's demand therefor, the
   Agent shall promptly notify the Company, and the Company shall
   immediately pay such corresponding amount to the Agent.  The Agent
   shall also be entitled to recover from the Lender or the Company, as
   the case may be, interest on such corresponding amount in respect of
   each day from the date such corresponding amount was made available by
   the Agent to the Company to the date such corresponding amount is
   recovered by the Agent, at a rate per annum equal to (x) if paid by
   such Lender, the overnight Federal Funds Rate or (y) if paid by the
   Company, the then applicable rate of interest on the Loans.

            Nothing herein shall be deemed to relieve any Lender from
   its obligation to fulfill its Bridge Loan Commitment hereunder or to
   prejudice any rights which the Company may have against any Lender as
   a result of any default by such Lender hereunder.

            (d)  Bridge Notes.  The Company shall execute and deliver
   to each Lender on the Closing Date a Bridge Note dated the Closing
   Date substantially in the form of Exhibit I annexed hereto to evidence
   the portion of the Bridge Loan made on such date by such Lender and
   with appropriate insertions ("Original Bridge Notes").  On each
   interest payment date prior to the Maturity Date on which the Company
   elects to pay a PIK Interest Amount pursuant to Section 2.3(b), the
   Company shall execute and deliver to each Lender on such interest
   payment date a Bridge Note dated such interest payment date
   substantially in the form of Exhibit I annexed hereto in a principal
   amount equal to such Lender's pro rata portion of such PIK Interest
   Amount and with other appropriate insertions (each a "Subsequent
   Bridge Note" and, together with the Original Bridge Notes, the "Bridge
   Notes").  A Subsequent Bridge Note shall bear interest from the date
   of its issuance at the same rate borne by all Bridge Notes.

            (e)  Scheduled Payment of Bridge Loan.  Subject to Section
   2.2, the Company shall pay in full the outstanding amount of the
   Bridge Loan and all other Obligations owing hereunder no later than
   the Maturity Date.

            (f)  Termination of Bridge Loan Commitment.  The Bridge
   Loan Commitment hereunder shall terminate on the earlier of (i) the
   closing of the PSD Acquisition without the use of the Bridge Loan,
   (ii) the termination of the PSD Purchase Agreement, (iii) the
   acceptance by the Target or any of its affiliates of an offer for all
   or any substantial portion of the assets or Common Stock of the Target
   other than the offer contemplated in the Commitment Letter, (iv)

                                  28
   <PAGE>

   immediately after the Closing Date, provided the Bridge Loan has been
   made, or (v) 5:00 p.m., Chicago, Illinois time, on November 1, 1999.
   The Company shall have the right, without premium or penalty, to
   reduce or terminate the Bridge Loan Commitment of the Lenders
   hereunder at any time.  Any Loan repaid may not be redrawn.

            (g)  Pro Rata Borrowings.  The Bridge Loan made under this
   Agreement shall be made by the Lenders pro rata on the basis of their
   respective Bridge Loan Commitments.  It is understood that no Lender
   shall be responsible for any default by any other Lender of its
   obligation to make its portion of the Bridge Loan hereunder and that
   each Lender shall be obligated to make its portion of the Bridge Loan
   hereunder, regardless of the failure of any other Lender to fulfill
   its commitments hereunder.

            2.2  Rollover Bridge Loan and Rollover Bridge Note.

            (a)  Rollover Bridge Loan Commitment.  Subject to the terms
   and conditions of this Agreement, including without limitation the
   conditions precedent set forth in Section 3.2, and in reliance upon
   the representations and warranties of the Company herein set forth,
   the Lenders hereby agree, upon the request of the Company, to convert
   on the Maturity Date the then outstanding principal amount of the
   Bridge Notes into a Rollover Bridge Loan (the "Rollover Bridge Loan"),
   such Rollover Bridge Loan to be in the aggregate principal amount of
   the then outstanding principal amount of the Bridge Notes.  The
   Company's request shall be evidenced by a Rollover Notice delivered to
   the Lenders no later than 11:00 A.M. (Chicago time), at least two
   Business Days in advance of the Maturity Date. The Lenders'
   commitments under this Section 2.2(a) are herein called collectively,
   the "Rollover Bridge Loan Commitment."

            (b)  Making of Rollover Bridge Loan.  Upon satisfaction or
   waiver of the conditions precedent specified in Section 3.2 hereof,
   each Lender shall extend to the Company the Rollover Bridge Loan to be
   issued on the Maturity Date by such Lender by canceling on its records
   a corresponding principal amount of the Bridge Notes held by such
   Lender.

            (c)  Maturity of Rollover Bridge Loan.  The Rollover Bridge
   Loan shall mature and the Company shall pay in full the outstanding
   principal amount thereof and accrued interest thereon on September 30,
   2005 (the "Final Maturity Date").

            (d)  Rollover Bridge Notes.  The Company, as borrower,
   shall execute and deliver to each Lender on the Maturity Date a

                                    29
   <PAGE>

   Rollover Bridge Note dated the Maturity Date substantially in the form
   of Exhibit II annexed hereto to evidence the Rollover Bridge Loan made
   on such date, in the principal amount of the Bridge Notes held by such
   Lender on such date and with other appropriate insertions
   (collectively the "Original Rollover Bridge Notes").  On or after the
   Maturity Date, on each interest payment date on which the Company
   elects to pay a PIK Interest Amount pursuant to Section 2.3(b), the
   Company shall execute and deliver to each Lender on such interest
   payment date a Rollover Bridge Note dated such interest payment date
   substantially in the form of Exhibit II annexed hereto in a principal
   amount equal to such Lender's pro rata portion of such PIK Interest
   Amount and with other appropriate insertions (each a "Subsequent
   Rollover Bridge Note" and, together with the Original Rollover Bridge
   Notes, the "Rollover Bridge Notes").  A Subsequent Rollover Bridge
   Note shall bear interest at the same rate borne by all Rollover Bridge
   Notes.

            2.3  Interest on the Notes.

            (a)  Rate of Interest.  The Notes shall bear interest on
   the unpaid principal amount thereof from the date made through
   maturity (whether by prepayment, acceleration or otherwise) at a rate
   determined as set forth below.

                (i)  Bridge Notes.  Subject to Section 2.3(a)(iii) and
   Section 2.7, the Bridge Notes shall bear interest for each Interest
   Period at a rate per annum equal to the LIBO Rate for such period plus
   the Applicable Margin.

                (ii)  Rollover Bridge Notes.  At any time after the
   Maturity Date, the Rollover Bridge Notes shall bear interest at a rate
   per annum equal to the Rollover Bridge Loan Rate.

                (iii)  Maximum Interest. Notwithstanding clause (i) or
   (ii) of this Section 2.3(a) or any other provision herein, other than
   Section 2.3(c), in no event will the combined sum of interest (cash or
   otherwise) on the Bridge Notes or the Rollover Bridge Notes exceed the
   lower of 18.00% per annum or the maximum interest rate permitted by
   law.

            (b)  Interest Payments.  Interest shall be payable (i) with
   respect to the Bridge Notes, in arrears on October 12, 1999 and every
   90 days thereafter (each of the preceding dates, a "Bridge Payment
   Date") and upon any prepayment of the Bridge Notes (to the extent
   accrued on the amount being prepaid) and on the Maturity Date in
   respect of the principal amount of any Subsequent Bridge Notes and
   (ii) with respect to the Rollover Bridge Notes, in arrears on each
   March 31, June 30, September 30 and December 31 of each year,

                                       30
   <PAGE>

   commencing on the first of such dates to follow the Maturity Date,
   upon any prepayment of the Rollover Bridge Notes (to the extent
   accrued on the amount being prepaid) and on the Final Maturity Date;
   provided, however, that if, on any interest payment date, the interest
   rate borne by the Bridge Notes or the Rollover Bridge Notes, as the
   case may be, exceeds the Maximum Cash Interest Rate, the Company may
   pay all or a portion of the interest payable in excess of the amount
   of interest that would be payable on such date at the Maximum Cash
   Interest Rate by issuance of Subsequent Bridge Notes or Subsequent
   Rollover Bridge Notes, as the case may be, in an aggregate principal
   amount equal to the amount of such interest being so paid (the "PIK
   Interest Amount").

            (c)  Post-Maturity Interest. Upon the occurrence and during
   the continuance of any Event of Default, the Company shall pay
   interest on the unpaid principal amount of each Note owing to each
   Lender, payable on demand, at a rate per annum equal to the rate which
   is (i) if any Rollover Bridge Notes are outstanding, 2.0% per annum in
   excess of the rate per annum then borne by such Rollover Bridge Notes
   and (ii) if any Bridge Notes are outstanding, the LIBO Rate plus 2%
   per annum plus the Applicable Margin with respect to such Bridge
   Notes.  With respect to the amount of any interest, fee or other
   amount payable hereunder that is not paid when due, from the date such
   amount shall be due until such amount shall be paid in full, the
   Company shall pay interest thereon, to the extent permitted under
   applicable law, in arrears on the date such amount shall be paid in
   full and on demand, at a rate per annum equal to the rate which is (i)
   if any Rollover Bridge Notes are outstanding, 2.0% per annum in excess
   of the rate per annum then borne by such Rollover Bridge Notes and
   (ii) if any Bridge Notes are outstanding, the LIBO Rate plus 2% per
   annum plus the Applicable Margin with respect to such Bridge Notes.

            (d)  Computation of Interest.  Interest on the Loans shall
   be computed on the basis of a 360-day year and, with respect to the
   Bridge Loan, the actual number of days elapsed in the period during
   which it accrues or, with respect to the Rollover Loan, twelve 30-day
   months.  In computing interest on the Loans, the date of the making of
   the Loans shall be included and the date of payment shall be excluded;
   provided, however, that if a Loan is repaid on the same day on which
   it is made, one day's interest shall be paid on that Loan.

            2.4  Fees.  The Company agrees to pay to FCCC
   and BOCM all fees and other obligations in accordance with, and at the
   times specified by, the Fee Letter.

            2.5  Prepayments and Payments.

                                       31
   <PAGE>

            (a)  Voluntary Prepayments.  Prior to the Final Maturity
   Date, the Company may, upon five days' prior written notice to each of
   the Lenders, prepay the Loans at any time, in whole or in part, on a
   pro rata basis, by paying to each applicable Lender an amount equal to
   100% of such Lender's pro rata share of the aggregate principal amount
   of the Loan to be prepaid, plus accrued and unpaid interest thereon to
   the Prepayment Date and all other amounts then due and owing
   hereunder; provided, however, that in connection with any prepayment
   of a Bridge Note made on a date other than the expiration of the
   Interest Period applicable thereto, the Company shall compensate each
   Lender in accordance with Section 2.8.

            (b)  Mandatory Prepayments.  The Company shall prepay the
   Loans ratably in accordance with the aggregate outstanding principal
   balances thereof, with 100% of the Net Cash Proceeds of: (i) the
   issuance of the Permanent Securities, (ii) any Asset Sale and (iii)
   any Financing; provided, however, that if any Indebtedness is
   outstanding under the Senior Secured Credit Agreement, then any
   amounts received pursuant to clauses (ii) and (iii) shall first be
   used for (A) any required repayment of such Indebtedness or (B) with
   respect to the Net Cash Proceeds of any Asset Sale, if permitted by
   the Senior Secured Credit Agreement, investment in assets or Property
   (other than Cash Equivalent Investments) in the Company's or any
   Subsidiary's business within twelve months after such Asset Sale.

            The Company shall, not later than the next Business Day
   following the receipt of any Net Cash Proceeds required to be applied
   to prepayment of the Loans pursuant to the immediately preceding
   paragraph, apply such Net Cash Proceeds on a pro rata basis to prepay
   the Loans by paying to each Lender an amount equal to 100% of such
   Lender's pro rata share of the aggregate principal amount of the Loans
   to be prepaid, plus accrued and unpaid interest thereon to the
   Prepayment Date and any other amounts then due and owing hereunder.
   Concurrently with any prepayment of the Loans pursuant to this Section
   2.5(b), the Company shall deliver to the Agent an Officer's
   Certificate demonstrating the calculation of the amount of the
   applicable net proceeds that gave rise to such prepayment.

            (c)  Effect of Notice of Prepayment.  The Company shall
   notify the Lenders in writing at their addresses shown in the Register
   of any date set for mandatory or optional prepayment (each such day, a
   "Prepayment Date") of applicable Loans.  Once such notice is sent or
   mailed, the Loans to be prepaid shall become due and payable on the
   Prepayment Date set forth in such notice.  Such notice may not be
   conditional.

            (d)  Purchase of Notes Upon a Change of Control.

                                      32
   <PAGE>

                (i)  Upon the occurrence of a Change of Control, the
   Company shall offer to prepay all or any part of the principal amount
   of each Lender's Bridge Notes or Rollover Bridge Notes pursuant to the
   offer described below (the "Change of Control Offer") at a prepayment
   price in cash equal to 101% of the aggregate principal amount thereof,
   plus accrued interest thereon to the date of repurchase.

                (ii)  At least ten days prior to any Change of Control,
   the Company shall mail a notice to each Lender stating:

            (1)  that the Change of Control Offer is being made
   pursuant to this Section 2.5(d) and that all Notes validly tendered
   will be accepted for payment;

            (2)  the purchase price and the purchase date, which shall
   be the date on which such Change of Control occurs (the "Offer Payment
   Date");

            (3)  that any Note not tendered will continue to accrue
   interest;

            (4)  that any Note accepted for payment pursuant to the
   Change of Control Offer shall cease to accrue interest after the Offer
   Payment Date unless the Company shall default in the payment of the
   repurchase price of the Notes;

            (5)  that if a Lender elects to have a Note purchased
   pursuant to the Change of Control Offer it will be required to
   surrender the Note, with the form entitled "Option of Holder to Elect
   Purchase" on the reverse of the Note completed, to the Company prior
   to 5:00 p.m. Chicago time on the Offer Payment Date;

            (6)  that a Lender will be entitled to withdraw its
   election if the Company receives, not later than 5:00 p.m. Chicago
   time on the Business Day preceding the Offer Payment Date, a telegram,
   telex, facsimile transmission or letter setting forth the principal
   amount of Notes such Lender delivered for purchase, and a statement
   that such Lender is withdrawing its election to have such Note
   purchased; and

            (7)  that if Notes are purchased only in part, a new Note
   of the same type will be issued in principal amount equal to the
   unpurchased portion of the Notes surrendered.

                (iii)  On or before the Offer Payment Date, the Company
   shall (1) accept for payment Notes or portions thereof which are to be
   purchased in accordance with the above, and (2) deposit at the Payment
   Office U.S. Legal Tender sufficient to pay the purchase price of all

                                      33
   <PAGE>

   Notes to be purchased.  The Agent shall promptly mail or, if provided
   with appropriate instructions, send by wire transfer to the Lenders
   whose Notes are so accepted payment in an amount equal to the purchase
   price unless such payment is prohibited pursuant to Section 8 hereof
   or otherwise.

            (e)  Manner and Time of Payment.  All payments of
   principal, interest, and any other amounts due hereunder and under the
   Notes by the Company or the Guarantors shall be made without defense,
   set-off or counterclaim and in same-day funds and delivered to the
   Agent, unless otherwise specified, not later than 12:00 Noon (Chicago
   time) on the date due at the Payment Office for the account of the
   Lenders; funds received by the Agent after that time shall be deemed
   to have been paid by the Company on the next succeeding Business Day.
    Other than with respect to PIK Interest Amounts, all payments of any
   Obligations to be made hereunder or under the Notes by the Company or
   any other obligor with respect thereto shall be made solely in U.S.
   Legal Tender or such other currency as is then legal tender for public
   and private debts in the United States of America.

            (f)  Payments on Non-Business Days.  Whenever any payment
   to be made hereunder or under the Notes shall be stated to be due on a
   day which is not a Business Day, the payment shall be made on the next
   succeeding Business Day and such extension of time shall be included
   in the computation of the payment of interest hereunder or under the
   Notes or of the commitment fees and other amounts due hereunder, as
   the case may be.

            (g)  Notation of Payment.  Each Lender agrees that before
   disposing of any Note held by it, or any part thereof (other than by
   granting participations therein), such Lender will make a notation
   thereon of all principal payments previously made thereon and of the
   date to which interest thereon has been paid and will notify the
   Company of the name and address of the transferee of that Note;
   provided, however, that the failure to make (or any error in the
   making of) such a notation or to notify the Company of the name and
   address of such transferee shall not limit or otherwise affect the
   obligation of the Company hereunder or under such Notes with respect
   to the Loans and payments of principal or interest on any such Note.

            2.6  Use of Proceeds.

            (a)  Bridge Loan.  The proceeds of the Bridge Loan shall be
   applied by the Company, together with borrowings under the Senior

                                    34
   <PAGE>

   Secured Credit Agreement and excess cash of the Company, to the
   payment of the Financing Requirement.

            (b)  Rollover Bridge Loan.  The proceeds of the Rollover
   Bridge Loan shall be used to repay and cancel any outstanding amount
   of Bridge Notes converted to Rollover Bridge Notes on such date.

            (c)  Margin Regulations.  No portion of the proceeds of any
   borrowing under this Agreement shall be used by the Company in any
   manner which might cause the borrowing or the application of such
   proceeds to violate the applicable requirements of Regulation U,
   Regulation T or Regulation X of the Board of Governors of the Federal
   Reserve System or any other regulation of the Board of Governors or to
   violate the Exchange Act, in each case as in effect on the date or
   dates of such borrowing and such use of proceeds.  In addition,
   following application of the proceeds of any borrowing under this
   Agreement, not more than 25% of the value of the assets (either of the
   Company only or of the Company and its Subsidiaries or a consolidated
   basis) will be Margin Stock

            2.7  Interest Rate Unascertainable, Increased Costs, Illegality.

            (a)  In the event that the Agent, in the case of clause (i)
   below, or any Lender, in the case of clauses (ii) and (iii) below,
   shall have determined (which determination shall, absent manifest
   error, be final and conclusive and binding upon all parties hereto):

                (i)  on any date for determining the LIBO Rate for any
   Interest Period, that by reason of any changes arising after the date
   of this Agreement affecting the London interbank market, adequate and
   fair means do not exist for ascertaining the applicable interest rate
   on the basis provided for in the definition of the LIBO Rate; or

                (ii)  at any time, that the relevant LIBO Rate
   applicable to any of its Notes shall not represent the effective
   pricing to such Lender for maintaining a Bridge Loan, or such Lender
   shall incur increased costs or reductions in the amounts received or
   receivable hereunder in respect of any Bridge Note, in any such case
   because of (x) any change since the date of this Agreement in any
   applicable law or governmental rule, regulation, guideline or order or
   any interpretation thereof and including the introduction of any new
   law or governmental rule, regulation, guideline or order (such as for
   example but not limited to a change in official reserve requirements,
   but, in all events, excluding reserves required under Regulation D of
   the Federal Reserve Board to the extent included in the computation of

                                     35
   <PAGE>

   the LIBO Rate), whether or not having the force of law and whether or
   not failure to comply therewith would be unlawful, and/or (y) other
   circumstances affecting such Lender or the London interbank market or
   the position of such Lender in such market; or

            (iii)  at any time, that the making or continuance by it
   of any Bridge Loan has become unlawful by compliance by such Lender in
   good faith with any law or governmental rule, regulation, guideline or
   order (whether or not having the force of law and whether or not
   failure to comply therewith would be unlawful) or has become
   impracticable as a result of a contingency occurring after the date of
   this Agreement which materially and adversely affects the London
   interbank market;

   then, and in any such event, the Agent or such Lender shall, promptly
   after making such determination, give notice (by telephone promptly
   confirmed in writing) to the Company and (if applicable) the Agent of
   such determination (which notice the Agent shall promptly transmit to
   each of the other Lenders).  Thereafter in the case of clause (i),
   (ii) and (iii) above, each Bridge Note shall bear interest at a rate
   equal to the Applicable Treasury Rate plus the Applicable Margin;
   provided, however, that in the case of clause (ii) above, the Company
   shall have the option of paying interest at a rate equal to the LIBO
   Rate (if the Bridge Loan is then outstanding) plus the Applicable
   Margin if it pays to such Lender, upon such Lender's delivery of
   written demand therefor to the Company with a copy to the Agent, such
   additional amounts (in the form of an increased rate of interest, or a
   different method of calculating interest, or otherwise, as such Lender
   in its sole discretion shall determine) as shall be required to
   compensate such Lender for such increased costs or reduction in
   amounts received or receivable hereunder.

            (b)  In the event that the Agent determines at any time
   following its giving of notice based on the conditions described in
   clause (a)(i) above that none of such conditions exist, the Agent
   shall promptly give notice thereof to the Company and the Lenders,
   whereupon the Bridge Notes will again bear interest pursuant to
   Section 2.3.

            (c)  In the event that a Lender determines at any time
   following its giving of a notice based on the conditions described in
   clause (a)(iii) above that none of such conditions exist, such Lender
   shall promptly give notice thereof to the Company and the Agent,
   whereupon the Bridge Notes held by such Lender shall bear interest
   pursuant to Section 2.3.

                                     36
   <PAGE>

            2.8  Funding Losses.  The Company shall compensate each Lender,
   upon such Lender's delivery of a written demand therefor to the Company,
   with a copy to the Agent (which demand shall set forth the basis for
   requesting such amounts and shall, absent manifest error, be final and
   conclusive and binding upon all of the parties hereto), for all
   reasonable losses, expenses and liabilities (including, without
   limitation, any loss, expense or liability incurred by such Lender in
   connection with the liquidation or reemployment of deposits or funds
   required by it to make or carry its Bridge Notes), that such Lender
   sustains:  (i) if for any reason (other than a default by such Lender)
   a borrowing of Bridge Notes does not occur on a date specified therefor
   in a Notice of Borrowing (whether or not rescinded, cancelled or
   withdrawn or deemed rescinded, cancelled or withdrawn,), (ii) if any
   repayment (including, without limitation, payment after acceleration)
   or conversion of any of its Bridge Notes occurs on a date which is not
   the last day of the Interest Period applicable thereto, (iii) if any
   prepayment of any of its Bridge Notes is not made on any date specified
   in a notice of prepayment given by the Company, or (iv) as a consequence
   of any default by the Company in repaying its Bridge Notes or any other
   amounts owing hereunder in respect of its Bridge Notes when required
   by the terms of this Agreement.  Calculation of all amounts payable to
   a Lender under this Section 2.8 shall be made on the assumption that
   such Lender has funded its relevant Bridge Notes through the purchase
   of a Eurodollar deposit bearing interest at the LIBO Rate in an amount
   equal to the amount of such Bridge Notes with a maturity equivalent to
   the Interest Period applicable to such Bridge Notes, and through the
   transfer of such Eurodollar deposit from an offshore office of such
   Lender to a domestic office of such Lender in the United States of
   America, provided that each Lender may fund its Eurodollar Loans in
   any manner that it in its sole discretion chooses and the foregoing
   assumption shall only be made in order to calculate amounts payable
   under this Section 2.8.

            2.9  Increased Capital.

            (a) If any Lender shall have determined that compliance
   with any applicable law, rule, regulation, guideline, request or
   directive (whether or not having the force of law) of any governmental
   authority, central bank or comparable agency, has or would have the
   effect of reducing the rate of return on the capital or assets of such
   Lender or any Person controlling such Lender as a consequence of its
   commitments or obligations hereunder, then from time to time, upon
   such Lender's delivery of a written demand therefor to the Agent and
   the Company (with a copy to the Agent), the Company shall pay to such
   Lender such additional amount or amounts as will compensate such
   Lender or Person for such reduction.

                                   37
   <PAGE>

            (b)  In the event that any change in law occurring after
   the date that any lender becomes a Lender party to this Agreement
   shall, in the opinion of such Lender, require that any Bridge Loan
   Commitment of such Lender be treated as an asset or otherwise be
   included for purposes of calculating the appropriate amount of capital
   to be maintained by such Lender or any Person controlling such Lender,
   and such change in law shall have the effect of reducing the rate of
   return on the capital or assets of such Lender or any Person
   controlling such Lender as a consequence of its commitments or
   obligations hereunder, then from time to time, upon such Lender's
   delivery of a written demand therefor to the Agent and the Company
   (with a copy to the Agent), the Company shall pay to such Lender such
   additional amount or amounts as will compensate such Lender or Person
   for such reduction.

            2.10  Taxes.

            (a)  All payments made by the Company under this Agreement
   and the other Loan Documents shall be made free and clear of, and
   without reduction or withholding for or on account of, any present or
   future income, stamp or other taxes, levies, imposts, duties, charges,
   fees, deductions or withholdings, now or hereafter imposed, levied,
   collected, withheld or assessed by any governmental authority
   excluding, in the case of the Agent and each Lender, net income and
   franchise taxes imposed on the Agent or such Lender by the
   jurisdiction under the laws of which the Agent or such Lender is
   organized or any political subdivision or taxing authority thereof or
   therein, or by any jurisdiction in which such Lender's Domestic
   Lending Office or Eurodollar Lending Office, as the case may be, is
   located or any political subdivision or taxing authority thereof or
   therein (all such non-excluded taxes, levies, imposts, deductions,
   charges or withholdings being hereinafter called "Taxes").  If any
   Taxes are required to be withheld from any amounts payable to the
   Agent or any Lender hereunder or under the Notes, the amounts so
   payable to the Agent or such Lender shall be increased to the extent
   necessary to yield to the Agent or such Lender (after payment of all
   Taxes) interest or any such other amounts payable hereunder at the
   rates or in the amounts specified in this Agreement and the Notes.
   The Company agrees to indemnify and hold harmless the Agent and any
   Lender for the full amount of Taxes paid by the Agent or such Lender
   and any incremental taxes, interest or penalties arising therefrom or
   with respect thereto, whether or not such Taxes were correctly or
   legally asserted.  Payment under this indemnification shall be made
   within 30 days after the date the Agent or any Lender makes written
   demand therefor. Whenever any Taxes are payable by the Company, as
   promptly as possible thereafter, and in any event within 30 days, the
   Company shall send to the Agent for its own account or for the account

                                     38
   <PAGE>

   of such Lender, as the case may be, a certified copy of an original
   official receipt received by the Company showing payment thereof.  If
   the Company fails to pay any Taxes when due to the appropriate taxing
   authority or fails to remit to the Agent the required receipts or
   other required documentary evidence, the Company shall indemnify the
   Agent and the Lenders for any incremental taxes, interest or penalties
   that may become payable by the Agent or any Lender as a result of any
   such failure.  The agreements in this Section 2.10 shall survive the
   termination of this Agreement and the payment of the Notes and all
   other Obligations.

            (b)  Each Lender that is not incorporated under the laws of
   the United States of America or a state thereof (including each
   assignee, transferee or recipient that becomes a party to this Agree-
   ment pursuant to Section 13.1) agrees that, prior to the first date on
   which any payment is due to it hereunder, it will deliver to the
   Company and the Agent (i) two duly completed copies of United States
   Internal Revenue Service Form 1001 or 4224 or successor applicable
   form, as the case may be, certifying in each case that such Lender is
   entitled to benefits under an income tax treaty to which the United
   States is a party that reduces the rate of withholding tax on payments
   under this Agreement or certifying that the income receivable pursuant
   to this Agreement is effectively connected with the conduct of a trade
   or business in the United States, and (ii) an Internal Revenue Service
   Form W-8 or W-9 or successor applicable form, as the case may be, to
   establish an exemption from United States backup withholding tax.  If
   the form provided by a Lender prior to the first date on which a
   payment is due to it hereunder indicates a United States interest
   withholding tax rate in excess of zero, withholding tax at such rate
   shall be considered excluded from Taxes unless and until such Lender
   provides the appropriate form certifying that a lesser rate applies,
   whereupon withholding tax at such lesser rate only shall be considered
   excluded from Taxes; provided, however, that, if at the date of an
   assignment under Section 13.1(a) pursuant to which such Lender
   assignee becomes a party to this Agreement, the Lender assignor was
   entitled to payments under subsection 2.10(a) in respect of United
   States withholding tax with respect to interest paid at such date,
   then, to such extent, the term Taxes shall include (in addition to
   withholding taxes that may be imposed in the future or other amounts
   otherwise includible in Taxes) United States withholding tax, if any,
   applicable with respect to the Lender assignee on such date.  Each
   Lender which delivers to the Company and the Agent a Form 1001 or 4224
   and Form W-8 or W-9 pursuant to the preceding sentence further
   undertakes to deliver to the Company and the Agent two further copies
   of the said letter and Form 1001 or 4224 and Form W-8 or W-9, or
   successor applicable forms, or other manner of certification, as the
   case may be, on or before the date that any such letter or form
   expires or becomes obsolete or after the occurrence of any event

                                     39
   <PAGE>

   requiring a change in the most recent letter and form previously
   delivered by it to the Company, and such extensions or renewals
   thereof as may reasonably be requested by the Company, certifying in
   the case of a Form 1001 or 4224 that such Lender is entitled to
   receive payments under this Agreement without deduction or withholding
   of any United States federal income taxes, unless in any such case an
   event (including, without limitation, any change in treaty, law or
   regulation) has occurred prior to the date on which any such delivery
   would otherwise be required which renders all such forms inapplicable
   or which would prevent such Lender from duly completing and delivering
   any such letter or form with respect to it and such Lender advises the
   Company that it is not capable of receiving payments without any
   deduction or withholding of United States federal income tax, and in
   the case of a Form W-8 or W-9, establishing an exemption from United
   States backup withholding tax.

   SECTION 3. CONDITIONS

            3.1  Conditions to Bridge Loan.  The obligation of the Agent
   and each Lender to make the Bridge Loan is subject to the prior or
   concurrent satisfaction of each of the following conditions:

            (a)  Document Delivery.  On or before the Closing Date, all
   corporate and other proceedings taken or to be taken in connection
   with the transactions contemplated hereby and all documents incidental
   thereto not previously found acceptable by the Agent shall be
   reasonably satisfactory in form and substance to the Agent, and the
   Agent shall have received on behalf of the Lenders the following
   items, each of which shall be in form and substance satisfactory to
   the Agent and, unless otherwise noted below or in the definition
   thereof, dated the Closing Date:

                (i)  executed copies of this Agreement and the Bridge
   Notes substantially in the form of Exhibit I annexed hereto executed
   in accordance with Section 2.1(d) drawn to the order of the Lenders
   and with appropriate insertions;

                (ii)  an executed copy of the Escrow Agreement
   substantially in the form of Exhibit VII annexed hereto;

                (iii)  a certified copy of the Company's charter,
   together with a certificate of status, compliance, good standing or
   like certificate with respect to the Company issued by the appropriate
   government officials of the jurisdiction of its incorporation and of
   each jurisdiction in which it owns any material assets or carries on

                                    40
   <PAGE>

   any material business, each to be dated a recent date prior to the
   Closing Date;

                (iv)  a copy of the Company's bylaws, certified as of
   the Closing Date by its Secretary or one of its Assistant Secretaries;

                (v)  a copy of any stockholders' agreements or any
   other ownership arrangements for the Company, certified as of the
   Closing Date by its Secretary or one of its Assistant Secretaries;

                (vi)  Board Resolutions of the Company approving and
   authorizing the execution, delivery and performance of this Agreement,
   each of the other Loan Documents and the Related Documents, the Senior
   Secured Credit Agreement, the Transactions and any other documents,
   instruments and certificates required to be executed by the Company in
   connection herewith and therewith and approving and authorizing the
   execution, delivery and  payment of the Notes and the consummation of
   the Transactions;

                (vii)  signature and incumbency certificates of the
   Company's officers executing this Agreement and the Bridge Notes;

                (viii)  an originally executed Notice of Borrowing
   substantially in the form of Exhibit IV-A annexed hereto, signed by
   the President or a Vice President of the Company on behalf of the
   Company and delivered to the Agent;

                (ix)  originally executed copies of one or more
   favorable written opinions of (I) Latham and Watkins, counsel for the
   Company, substantially in the form of Exhibit V annexed hereto and
   addressed to the Lenders and (II) such other opinions of counsel and
   such certificates or opinions of accountants, appraisers or other
   professionals as the Agent shall have reasonably requested;

                (x)  a certificate of the Chief Financial Officer or
   the Treasurer of the Company addressed to the Agent and the Lenders
   and in form and substance satisfactory to the Agent and the Lenders,
   attesting that, on a pro forma basis, after giving effect to the PSD
   Acquisition and the other Transactions, including the full borrowings
   under the Senior Secured Credit Agreement, the Company and its
   Subsidiaries (individually or in the aggregate) shall be solvent;

                (xi)  a true and correct copy of the PSD Purchase
   Agreement, which shall not have been amended without the Agent's

                                      41
   <PAGE>

   consent and which shall be in full force and effect, and a copy of all
   closing documents relating to the PSD Acquisition and all such
   counterpart originals or certified copies of such documents,
   instruments, certificates and opinions (together with reliance letters
   for the benefit of the Agent and the Lenders) related thereto as the
   Agent may reasonably request;

                (xii)  executed or conformed copies of the Senior
   Secured Credit Agreement and any amendments thereto made on or prior
   to the Closing Date and a copy of each legal opinion delivered in
   connection with the Senior Secured Credit Agreement;

                (xiii)  executed payoff letters with respect to
   Indebtedness existing prior to the Closing Date which is not listed on
   Schedule 6.2;

                (xiv)  copies of all documents actually delivered to the
   lenders and/or agent under the Senior Secured Credit Agreement as a
   condition to the loans thereunder not otherwise required to be
   delivered under this Section 3.1; and

                (xv)  such other documents, certificates and opinions
   as the Agent may reasonably request.

            (b)  Concurrent Transactions; Documentation.  The Senior
   Financing shall have been consummated on terms satisfactory to the
   Agent pursuant to definitive documentation in form and substance
   satisfactory to the Agent and all conditions precedent to the
   consummation of the Senior Financing shall have been satisfied or,
   with the prior approval of the Agent, waived.  Funds from the Senior
   Financing and the Bridge Loan, together with the Company's excess
   cash, shall be sufficient to consummate the Transactions.  The PSD
   Acquisition shall have been consummated on terms satisfactory to the
   Agent pursuant to the provisions of the PSD Purchase Agreement, which
   shall be in form and substance satisfactory to the Agent, and all
   conditions precedent to the consummation of the PSD Acquisition shall
   have been satisfied or, with the prior approval of the Agent, waived.

            (c)  Capitalization; Etc.  The corporate, capital and
   ownership structure (including articles of incorporation and bylaws),
   stockholders' agreements and management of the Company and its
   Subsidiaries (after giving effect to the Transactions) shall be
   satisfactory to the Agent in all respects.

            (d)  Due Diligence.  The Agent and its counsel shall have
   completed their business, legal, environmental, tax, pension,

                                     42
   <PAGE>

   regulatory and accounting due diligence review of the Company's and
   the Target's business, assets, liabilities (actual and contingent),
   operations, condition (financial or otherwise), management, prospects
   and value and shall be satisfied with the results thereof (including,
   if requested by the Agent, an environmental review report,
   satisfactory in from and substance to the Agent, from an environmental
   review firm acceptable to the Agent, as to any environmental hazards
   or liabilities and the Company's plans with respect thereto).

            (e)  Financial Statements.  The Agent shall have received
   and, in each case, approved all audited, unaudited and pro forma
   financial statements described in Section 4.4 and all completed,
   probable and pending acquisitions, including the PSD Acquisition, all
   meeting the requirements of Regulation S-X under the Securities Act,
   applicable to a Registration Statement under the Securities Act on
   Form S-1, except that the Agent and the Lenders acknowledge and agree
   that such financial statements shall not include interim 1998
   financial data for the Target.  All such financial statements of the
   Target shall be prepared in accordance with GAAP.

            (f)  Material Adverse Change.  No material adverse change
   (including any event which, in the opinion of the Agent, is reasonably
   likely to result in such a material adverse change) in the business,
   assets, liabilities (actual and contingent), operations, condition
   (financial or otherwise), management, prospects or value of the
   Company and its Subsidiaries, taken as a whole, or the Target and its
   Subsidiaries, taken as a whole, shall have occurred since the date of
   the most recent audited annual financial statements of the Company and
   the Target described in Section 4.4 and delivered to the Agent as of
   the date of the Commitment Letter, and no material inaccuracy in such
   financial statements shall exist.

            (g)  Market Conditions.  No material adverse change in the
   financial or capital markets generally, or in the market for high
   yield debt or bridge loans in particular, shall have occurred which,
   in the judgment of the Agent, would make it impractical or inadvisable
   to proceed with the funding of the Bridge Loan or the sale of the
   Permanent Securities.  No banking moratorium shall have been declared
   by Federal or Illinois banking officials.

            (h)  Other Obligations.  On or prior to the Closing Date,
   (A) all fees and expenses due and payable to FCCC, BOCM, any other
   Lender and/or their affiliates pursuant to the Commitment Letter, the
   Engagement Letter, or the Fee Letter shall have been paid in full as
   contemplated therein, and (B) the Company shall have complied with all
   of its obligations under the Commitment Letter, the Engagement Letter,

                                     43
   <PAGE>

   the Fee Letter and the Related Documents, and each such agreement
   shall be in full force and effect.

            (i)  Consents.  All governmental, shareholder and third-
   party consents (including Hart-Scott-Rodino clearance) and approvals
   necessary or reasonably advisable in connection with the Transactions
   and the other transactions contemplated hereby shall have been
   obtained; all such consents and approvals shall be in full force and
   effect; and all applicable waiting periods shall have expired without
   any action being taken or threatened by any authority that could
   restrain, prevent or impose any material adverse conditions on the
   Transactions or such other transactions.

            (j)  Judgments, Etc.  There shall not exist (A) any order,
   decree, judgment, ruling or injunction which restrains the
   consummation of the Transactions in the manner contemplated by the PSD
   Purchase Agreement, or (B) any pending or threatened action, suit,
   investigation or proceeding before any Tribunal that, if adversely
   determined, could have a Material Adverse Effect.

            (k)  Intellectual Property.  The Company shall provide a
   schedule of all United States registered patents and United States
   registered trademarks for the Company and the Target.

            (l)  Other Reports.  The Agent shall have received, in form
   and substance reasonably satisfactory to it, all environmental
   reports, Year 2000 questionnaires and such other reports as it may
   reasonably request.

            (m)  Officer's Certificate.  Simultaneously with the making
   of the Bridge Loan by the Lenders, the Company shall have delivered to
   the Agent an Officers' Certificate from the Company in form and
   substance satisfactory to the Agent to the effect that (i) the
   representations and warranties in Section 4 are true, correct and
   complete in all material respects on and as of the Closing Date to the
   same extent as though made on and as of that date, (ii) on or prior to
   the Closing Date, the Company has performed and complied in all
   material respects with all covenants and conditions required to be
   performed and observed by the Company on or prior to the Closing Date
   and (iii) all conditions to the consummation of the PSD Acquisition in
   the PSD Purchase Agreement have been satisfied substantially on the
   terms set forth therein and have not been waived or amended without
   the Agent's prior written consent.

                                       44
   <PAGE>

            (n)  No Default.  No event shall have occurred and be
   continuing or would result from the consummation of the borrowing
   contemplated by the Notice of Borrowing which would constitute a
   Default or Event of Default.

            (o)  Regulatory Requirements  The making of the Bridge Loan
   in the manner contemplated in this Agreement shall not violate the
   applicable provisions of Regulation T, U or X of the Board of
   Governors of the Federal Reserve Board or any other regulation of the
   Board.

            (p)  Ordinary Course Operations.  From the date of the
   Commitment Letter, the Company shall have operated its business in the
   ordinary course, except as contemplated by the Transactions.

            (q) Offering Memorandum.  The Company shall have delivered
   to BOCM (i) a preliminary offering memorandum to be distributed at the
   direction of BOCM to potential purchasers, containing all relevant
   information about the Transactions, the Target and any other matters
   which BOCM may deem necessary to a successful offering or which BOCM
   or the Company may consider necessary or appropriate for accurate,
   complete and adequate disclosure, (ii) management's projections for
   the Company after giving pro forma effect to the Transactions and
   (iii) such other information as may be reasonably requested by any
   rating agency or by BOCM or their counsel.

            (r)  Escrowed Warrants.  The Company shall have executed
   the Warrant Agreement and the Warrants and shall have delivered them
   to the Escrow Agent to be held in escrow pursuant to the Escrow
   Agreement.

            (s)  Repayment of Existing Indebtedness.  The Company shall
   have paid (or made arrangements to pay concurrently with the making of
   the Bridge Loan hereunder) all principal, interest, fees and premiums,
   if any, on all Indebtedness outstanding prior to the Closing Date
   which is not listed on Schedule 6.2 or otherwise permitted under this
   Agreement.

            3.2  Conditions to Rollover Bridge Loan.  The obligation of
   the Lenders to make the Rollover Bridge Loan on the Maturity Date is
   subject to the prior or concurrent satisfaction or waiver of the
   following conditions precedent:

            (a)  No Default.  There shall exist no Default or Event of
   Default on the Maturity Date.

                                      45
   <PAGE>

            (b)  Fees, etc.  All fees due to FCCC, BOCM and/or the
   other Lenders shall have been paid in full and all other requirements
   and obligations under the Fee Letter and the Engagement Letter shall
   have been satisfied or fulfilled.

            (c)  No Injunction, Etc.  No order, decree, injunction or
   judgment enjoining the issuance of any Rollover Bridge Loan shall be
   in effect.

            (d)  Senior Subordinated Indenture.  At least thirty (30)
   days prior to the Maturity Date, the Company shall have delivered a
   draft of the Senior Subordinated Indenture reasonably acceptable to
   the Lenders,  and such Senior Subordinated Indenture shall be in full
   force and effect on or prior to the Maturity Date.

            (e)  Registration Statement.  A Registration Statement
   shall be in effect for the issuance of Exchange Notes to the Lenders.

            (f)  Rollover Notice.  The Agent shall have received in
   accordance with the provisions of Section 2.2(a) an originally
   executed Rollover Notice.

            (g)  Officer's Certificate.  On the Maturity Date, the
   Agent shall have received an Officers' Certificate from the Company
   dated the Maturity Date and satisfactory in form and substance to the
   Agent, to the effect that the conditions in this Section 3.2 are
   satisfied on and as of the Maturity Date.

            (h)  Rollover Bridge Notes.  The Company shall have
   executed and delivered to the Agent on the Maturity Date for delivery
   to the Lenders, Rollover Bridge Notes dated the Maturity Date
   substantially in the form of Exhibit II annexed hereto to evidence the
   Rollover Bridge Loan, in the principal amount of the Rollover Bridge
   Loan (which principal amount shall be the aggregate principal amount
   of the Bridge Loan outstanding on the Maturity Date, including the
   principal amount of any Subsequent Bridge Notes), and with other
   appropriate insertions.

            (i)  Certain Regulations.  The making of the Rollover
   Bridge Loan shall not violate Regulation T, U or X of the Board of
   Governors of the Federal Reserve Board or any other regulation of the
   Board.

   SECTION 4.  REPRESENTATIONS AND WARRANTIES OF THE COMPANY

            In order to induce the Lenders to enter into this Agreement
   and to make the Loans, the Company represents and warrants to the

                                     46
   <PAGE>

   Lenders that, at the time of execution hereof and on the Closing Date,
   the following statements are true, correct and complete:

            4.1  Existence and Standing.  Each of the Company and its
   Subsidiaries is a corporation, partnership (in the case of Subsidiaries
   only) or limited liability company duly and properly incorporated or
   organized, as the case may be, validly existing and (to the extent
   such concept applies to such entity) in good standing under the laws of
   its jurisdiction of incorporation or organization and has all requisite
   authority to own, operate and encumber its Property and to conduct
   its business, as presently conducted and as proposed to be conducted
   giving effect to the PSD Acquisition, in each jurisdiction in which
   its business is conducted, except for any failure to be so authorized
   that could not reasonably be expected to have a Material Adverse Effect.

            4.2  Authorization and Validity.  Each Loan Party has the power
   and authority and legal right to execute and deliver the Loan Documents
   to which it is a party and to perform its obligations thereunder.  The
   execution and delivery by each Loan Party of the Loan Documents to which
   it is a party and the performance of its obligations thereunder have
   been duly authorized by proper corporate (or equivalent) proceedings,
   and the Loan Documents to which such Loan Party is a party constitute
   legal, valid and binding obligations of such Loan Party enforceable
   against such Loan Party in accordance with their respective terms,
   except to the extent that the enforceability thereof may be limited by
   applicable bankruptcy, insolvency, reorganization or similar laws
   affecting the enforcement of creditors' rights generally or by general
   principles of equity (regardless of whether such enforcement is
   considered in a proceeding in equity or at law).

            4.3  No Conflict; Government Consent.  Neither the execution
   and delivery by the Loan Parties of the Loan Documents, nor the
   consummation of the transactions therein contemplated, nor compliance
   with the provisions thereof will violate (i) any law, rule, regulation,
   order, writ, judgment, injunction, decree or award binding on the Company
   or any of its Subsidiaries or (ii) the Company's or any Subsidiary's
   articles or certificate of incorporation, partnership agreement,
   certificate of partnership, articles or certificate of organization,
   by-laws, or operating or other management agreement, as the case may be,
   or (iii) the provisions of any indenture, instrument or agreement to
   which the Company or any of its Subsidiaries is a party or is subject,
   or by which it, or its Property, is bound, or conflict with or constitute
   a default thereunder, or result in, or require, the creation or
   imposition of any Lien in, of or on the Property of the Company or any
   Subsidiary pursuant to the terms of any such indenture, instrument or

                                     47
   <PAGE>

   agreement.  No order, consent, adjudication, approval, license,
   authorization, or validation of, or filing, recording or registration
   with, or exemption by, or other action in respect of any Governmental
   Authority which has not been obtained by the Company or any of its
   Subsidiaries, is required to be obtained by the Company or any of its
   Subsidiaries in connection with the execution and delivery of the Loan
   Documents, the borrowings under this Agreement, the payment and
   performance by the Company of the Obligations or the legality,
   validity, binding effect or enforceability of any of the Loan
   Documents, except filings, consents or notices which have been made,
   obtained or given, or which, if not made, obtained or given,
   individually or in the aggregate could not reasonably be expected to
   have a Material Adverse Effect.

            4.4  Financial Statements.

            (a)  The December 31, 1998 audited consolidated financial
   statements and the March 31, 1999 and June 30, 1999 unaudited
   consolidated financial statements of the Company and its Subsidiaries
   heretofore delivered to the Lenders were prepared in accordance with
   generally accepted accounting principles in effect on the date such
   statements were prepared and fairly present the consolidated financial
   condition and operations of the Company and its Subsidiaries at such
   dates and the consolidated results of their operations for the periods
   then ended, subject, in the case of such unaudited financial statements,
   to normal year-end adjustments and the absence of notes.

            (b)  The December 31, 1998, financial statements of the
   Acquired Business and any additional financial statements of the
   Acquired Business required by the Securities and Exchange Commission
   heretofore delivered to the Lenders were prepared in accordance with
   GAAP in effect on the date such statements were prepared and fairly
   present the financial condition and operations of the Acquired
   Business at such dates and the results of its operations for the
   periods then ended.

            (c)  The pro forma financial statements of the Company and
   its Subsidiaries, copies of which are attached hereto as Schedule 4.4,
   present on a pro forma basis the financial condition of the Company
   and its Subsidiaries as of such date, and reflect on a pro forma basis
   those liabilities reflected in the notes thereto and resulting from
   consummation of the PSD Acquisition, the transactions contemplated by
   this Agreement and the Senior Secured Credit Agreement, and the
   payment or accrual of all costs and expenses with respect to any of
   the foregoing.  The projections and assumptions expressed in such pro
   forma financials were prepared in good faith and represent good faith
   assumptions and estimates on the part of the Company based on the
   information available to the Company at the time so prepared.

                                     48
   <PAGE>

            4.5  Material Adverse Change.  Since December 31, 1998 there
   has been no change in the business, Property, condition (financial or
   otherwise) or results of operations of the Company and its Subsidiaries
   taken as a whole, including, without limitation, the Acquired Business,
   which could reasonably be expected to have a Material Adverse Effect.

            4.6  Taxes.  The Company and its Subsidiaries have filed all
   United States federal tax returns and all other tax returns which are
   required to be filed and have paid all taxes due pursuant to said returns
   or pursuant to any assessment received by the Company or any of its
   Subsidiaries, except such taxes, if any, as are not yet due and payable
   or are being contested in good faith and as to which adequate reserves
   have been provided in accordance with Agreement Accounting Principles.
   The United States income tax returns of the Company and its Subsidiaries
   have been audited by the Internal Revenue Service through the fiscal
   year ended December 31, 1994.  No tax liens have been filed and no
   claims are being asserted with respect to any such taxes.  The charges,
   accruals and reserves on the books of the Company and its Subsidiaries in
   respect of any taxes are adequate in accordance with Agreement
   Accounting Principles.

            4.7  Litigation and Contingent Obligations.  Except as set
   forth on Schedule 4.7,  there is no litigation, arbitration, governmental
   investigation, proceeding or inquiry pending or, to the knowledge of
   any of their officers, threatened against or affecting the Company or
   any of its Subsidiaries which could reasonably be expected to have a
   Material Adverse Effect or which seeks to prevent, enjoin or delay the
   making of any Loans.  Other than any liability incident to any
   litigation, arbitration or proceeding which (i) could not reasonably
   be expected to have a Material Adverse Effect or (ii) is set forth on
   Schedule 4.7, the Company and its Subsidiaries have no material
   contingent obligations not provided for or disclosed in the financial
   statements referred to in Section 4.4.

            4.8  Subsidiaries.  Schedule 4.8 contains an accurate list of
   all Subsidiaries of the Company as of the date of this Agreement after
   giving effect to the PSD Acquisition, setting forth their respective
   jurisdictions of organization and the percentage of their respective
   Equity Interests owned by the Company or other Subsidiaries.  All of the
   issued and outstanding Equity Interests of such Subsidiaries have been
   (to the extent such concepts are relevant with respect to such ownership
   interests) duly authorized and issued and are fully paid and
   non-assessable.

            4.9  ERISA.  Except as could not reasonably be expected,
   individually or in the aggregate, to have a Material Adverse Effect:
   there are no Unfunded Liabilities under any Single Employer Plans;

                                     49
   <PAGE>

   neither the Company nor any other member of the Controlled Group has
   incurred, or is reasonably expected to incur, any withdrawal liability
   to Multiemployer Plans; each Plan complies in all material respects with
   all applicable requirements of law and regulations; no Reportable Event
   has occurred with respect to any Plan; neither the Company nor any other
   member of the Controlled Group has withdrawn from any Plan or initiated
   steps to do so; and no steps have been taken to reorganize or terminate
   any Plan.

            4.10  Accuracy of Information.  No information, exhibit or report
   furnished by the Company or any of its Subsidiaries to the Agent or to any
   Lender in connection with the negotiation of, or compliance with, the Loan
   Documents contained any material misstatement of fact or omitted to
   state a material fact or any fact necessary to make the statements
   contained therein not materially misleading in a manner relied upon by
   the Lenders to their detriment.

            4.11  Regulation U. Neither the Company nor any of its Subsidiaries
   is engaged in the business of extending credit for the purpose of
   purchasing or carrying Margin Stock.

            4.12  Material Agreements.  Neither the Company nor any Subsidiary
   is a party to any agreement or instrument or subject to any charter or
   other corporate restriction which could reasonably be expected to have a
   Material Adverse Effect.  Neither the Company nor any Subsidiary is in
   default in the performance, observance or fulfillment of any of the
   obligations, covenants or conditions contained in any agreement (other
   than agreements or instruments evidencing or governing Indebtedness) to
   which it is a party, which default could reasonably be expected to
   have a Material Adverse Effect.

            4.13  Compliance With Laws.  The Company and its Subsidiaries
   have complied with all applicable statutes, rules, regulations, orders
   and restrictions of any Governmental Authority having jurisdiction over
   the conduct of their respective businesses or the ownership of their
   respective Property, except for any failure to comply with any of the
   foregoing which could not reasonably be expected to have a Material
   Adverse Effect.

            4.14  Ownership of Properties.  Except as set forth on
   Schedule 6.6, on the date of this Agreement, the Company and its
   Subsidiaries will have good title, free of all Liens other than
   those permitted by Section 6.6, to all of the Property and assets
   reflected in the Company's most recent consolidated financial statements
   provided to the Agent as owned by the Company and its Subsidiaries and
   all other Property material to the Company's and its Subsidiaries'
   businesses, except as sold or otherwise disposed of in the ordinary
   course of business.  The Company and each Subsidiary (i) owns and/or

                                    50
   <PAGE>

   possesses all the patents, trademarks, trade names, service marks,
   copyrights, licenses and rights with respect to the foregoing necessary
   for the present conduct of its business without any known conflict with
   the rights of others, and (ii) owns and/or possesses and/or has applied
   for all the patents, trademarks, trade names, service marks, copyrights,
   licenses and rights with respect to the foregoing necessary for the
   planned conduct of its business for the next six months, without any
   known conflict with the rights of others, except, with respect to clauses
   (i) and (ii), where the failure to own and/or possess any patents,
   trademarks, trade names, service marks, copyrights, licenses and/or
   rights could not reasonably be expected to have a Material Adverse Effect
   and/or subject the Company or any Subsidiary to any material liability in
   connection with any infringement and/or similar cause of action
   related to any of the foregoing.

            4.15  Plan Assets; Prohibited Transactions.  The Company is not
   an entity deemed to hold "plan assets" within the meaning of 29 C.F.R.
   Sec. 2510.3-101 of an employee benefit plan (as defined in Section 3(3) of
   ERISA) which is subject to Title I of ERISA or any plan (within the
   meaning of Section 4975 of the Internal Revenue Code), and neither
   the execution of this Agreement nor the making of Loans hereunder gives
   rise to a prohibited transaction (within the meaning of Section 406 of
   ERISA or Section 4975 of the Internal Revenue Code) with respect to "plan
   assets" of the Company and its Subsidiaries.

            4.16  Environmental Matters.  In the ordinary course of its
   business, the officers of the Company consider the effect of Environmental
   Laws on the business of the Company and its Subsidiaries, in the course of
   which they identify and evaluate potential risks and liabilities accruing
   to the Company due to Environmental Laws.  On the basis of this
   consideration, the Company has concluded that Environmental Laws could
   not reasonably be expected to have a Material Adverse Effect.  Neither
   the Company nor any Subsidiary has received any notice to the effect
   that its operations are not in material compliance with any of the
   requirements of applicable Environmental Laws or are the subject of any
   investigation by any Governmental Authority evaluating whether any
   remedial action is needed to respond to a release of any toxic or
   hazardous waste or substance into the environment, which
   non-compliance or remedial action could reasonably be expected to have
   a Material Adverse Effect.

            4.17  Investment Company Act.  Neither the Company nor any
   Subsidiary is an "investment company" or a company "controlled" by an
   "investment company", within the meaning of the Investment Company Act
   of 1940, as amended.

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   <PAGE>

            4.18  Public Utility Holding Company Act.  Neither the Company
   nor any Subsidiary is a "holding company" or a "subsidiary company" of a
   "holding company", or an "affiliate" of a "holding company" or of a
   "subsidiary company" of a "holding company", within the meaning of the
   Public Utility Holding Company Act of 1935, as amended.

            4.19  Year 2000.  The Company has generally completed its
   assessment of Year 2000 Issues and has a realistic program (the "Year
   2000 Program") for completing required remediations and replacements of
   its assets on a timely basis.  The Company has identified significant
   suppliers and is requesting information from them regarding the Year 2000
   readiness of their products and services, but it has not, as of the date
   hereof, received sufficient responses to ascertain that a material
   adverse impact can be avoided as a result of the failure of such suppliers
   to deliver products and services after December 31, 1999.  Except as set
   forth in the preceding sentence and for Year 2000 Issues affecting the
   United States and international economies generally, based on its
   assessment and Year 2000 Program the Company does not anticipate that
   Year 2000 Issues will have a Material Adverse Effect.

            4.20  Post-Retirement Benefits. As of the Closing Date, neither
   the Company nor any of its Subsidiaries has any expected costs of
   post-retirement medical and insurance benefits payable to their employees
   and former employees, as estimated by the Company in accordance with
   Financial Accounting Standards Board Statement No. 106.

            4.21  Insurance.  Schedule 4.21 accurately sets forth as of the
   Closing Date all insurance policies and programs currently in effect with
   respect to the respective properties and assets and business of the Company
   and its Domestic Subsidiaries, specifying, for each such policy and program,
   (i) the amount thereof, (ii) the risks insured against thereby, (iii) the
   name of the insurer and each insured party thereunder, (iv) the policy or
   other identification number thereof, (v) the expiration date thereof,
   (vi) the annual premium with respect thereto, and (vii) any reserves
   relating to any self-insurance program that is in effect.

            4.22  The PSD Acquisition.  As of the Closing Date and immediately
   prior to the making of the initial Loans:

            (a)  the PSD Purchase Agreement is in full force and
   effect, no material breach, default or waiver of any term or provision
   of the PSD Purchase Agreement by the Company or any of its
   Subsidiaries or, to the best of the Company's knowledge, the other
   parties thereto has occurred (except for such breaches, defaults and

                                       52
   <PAGE>

   waivers, if any, consented to in writing by the Agent) and no action
   has been taken by any competent Governmental Authority which
   restrains, prevents or imposes any material adverse condition upon, or
   seeks to restrain, prevent or impose any material adverse condition
   upon, the PSD Acquisition;

            (b)  the representations and warranties of each of the
   Company and, to the Company's knowledge, the Sellers (as defined in
   the PSD Purchase Agreement) contained in the PSD Purchase Agreement
   are true and correct in all material respects;

            (c)  except as set forth on Schedule 4.7, to the Company's
   knowledge, there is no litigation, arbitration, governmental
   investigation, proceeding or inquiry pending or threatened against
   Pasteur Sanofi Diagnostics S.A. or any of its Subsidiaries which could
   reasonably be expected to have a material adverse effect on the
   business, Property, condition (financial or otherwise) or results of
   operations of Pasteur Sanofi Diagnostics S.A. and its Subsidiaries,
   taken as a whole; and

            (d)  all material conditions precedent to, and all material
   consents and material regulatory approvals necessary to permit, the
   PSD Acquisition pursuant to the PSD Purchase Agreement have been
   satisfied or waived with the prior written consent of the Agent; but
   for the payment of the purchase price, the PSD Acquisition has been
   consummated or, concurrently with the transactions contemplated
   hereby, will be consummated, in accordance with the PSD Purchase
   Agreement and applicable law; the aggregate purchase price for the
   Acquired Business under the PSD Purchase Agreement does not exceed the
   equivalent of U.S. $210,000,000; and upon the payment of the purchase
   price the Company will obtain good and marketable title to the
   "Shares" (as defined in the PSD Purchase Agreement) free and clear of
   any Liens other than Liens permitted under Section 6.6.

            4.23  Solvency.

            (a) Immediately after the consummation of the transactions to
   occur on the date hereof and immediately following the making of each
   Loan, if any, made on the date hereof and after giving effect to the
   application of the proceeds of such Loans, (i) the fair value of the
   assets of the Company and its Subsidiaries on a consolidated basis, at a
   fair valuation, will exceed the debts and liabilities, subordinated,
   contingent or otherwise, of the Company and its Subsidiaries on a
   consolidated basis; (ii) the present fair saleable value of the Property
   of the Company and its Subsidiaries on a consolidated basis will be
   greater than the amount that will be required to pay the probable
   liability of the Company and its Subsidiaries on a consolidated basis
   on their debts and other liabilities, subordinated, contingent or
   otherwise, as such debts and liabilities become absolute and matured;
   (iii) the Company and its Subsidiaries on a consolidated basis will be

                                       53
   <PAGE>

   able to pay their debts and liabilities, subordinated, contingent or
   otherwise, as such debts and liabilities become absolute and matured;
   and (iv) the Company and its Subsidiaries on a consolidated basis will
   not have unreasonably small capital with which to conduct the businesses
   in which they are engaged as such businesses are now conducted and are
   proposed to be conducted after the date hereof.

            (b)  The Company does not intend to, or to permit any of
   its Subsidiaries to, and does not believe that it or any of its
   Subsidiaries will, Incur debts beyond its ability to pay such debts as
   they mature, taking into account the timing of and amounts of cash to
   be received by it or any such Subsidiary and the timing of the amounts
   of cash to be payable on or in respect of its Indebtedness or the
   Indebtedness of any such Subsidiary.

   SECTION 4A.  REPRESENTATIONS AND WARRANTIES OF THE LENDERS

            Each of the Lenders represents and warrants to the Company
   that, at the time of execution hereof and on the Closing Date, the
   following statements are true, correct and complete:

            4A.1  Accredited Investor.  Such Lender is an institutional
   "accredited investor" within the meaning of Regulation D of the
   Securities Act and the Notes to be acquired by it pursuant to this
   Agreement are being acquired for its own account and without a view to,
   or for resale in connection with, any distribution thereof or any
   interest therein; provided that the provisions of this Section shall
   not prejudice such Lender's right at all times to sell or otherwise
   dispose of all or any part of the Notes so acquired pursuant to the
   terms of this Agreement, a registration under the Securities Act or an
   exemption from such registration available under the Securities Act.

            4A.2  Knowledge and Experience.  Such Lender has such
   knowledge and experience in financial and business matters so as to be
   capable of evaluating the merits and risks of its investment in the
   Notes, such Lender is capable of bearing the economic risks of such
   investment and such Lender has had the opportunity to conduct its own
   due diligence investigation in relation to its making of the Loans and
   the acquisition of the Notes hereunder.

            4A.3  Source of Funds.  No part of the funds used by such
   Lender to make the Loans hereunder constitutes assets of any "plan"
   (as defined in Section 4975 of the Internal Revenue Code).

                                       54
   <PAGE>

   SECTION 5.  AFFIRMATIVE COVENANTS

            The Company covenants and agrees that, until the Loans and
   the Notes and all other amounts due under this Agreement have been
   indefeasibly paid in full, it shall perform all covenants in this
   Section 5 required to be performed by it.

            5.1  Financial Reporting.  The Company will maintain, for
   itself and each Subsidiary, a system of accounting established and
   administered in accordance with generally accepted accounting
   principles, and furnish to the Lenders:

            (a)  Within 100 days after the close of each of its Fiscal
   Years, an unqualified (except for qualifications relating to changes
   in accounting principles or practices reflecting changes in generally
   accepted accounting principles and required or approved by the
   Company's independent certified public accountants) audit report
   certified by independent certified public accountants acceptable to
   the Required Lenders, prepared in accordance with Agreement Accounting
   Principles on a consolidated basis for itself and its Subsidiaries,
   including balance sheets as of the end of such period, related profit
   and loss and reconciliation of surplus statements, and a statement of
   cash flows.

            (b)  Within 60 days after the close of the first three
   quarterly periods of each of its Fiscal Years, for itself and its
   Subsidiaries, consolidated unaudited balance sheets as at the close of
   each such period and consolidated profit and loss and reconciliation
   of surplus statements and a statement of cash flows for the period
   from the beginning of such Fiscal Year to the end of such quarter, all
   certified by its chief financial officer.

            (c)  As soon as available, but in any event within 90 days
   after the beginning of each Fiscal Year of the Company, a copy of the
   plan and forecast (including a projected consolidated balance sheet,
   income statement and funds flow statement) of the Company and its
   Subsidiaries for such Fiscal Year.

            (d)  Together with the financial statements required under
   Sections 5.1(a) and (b), a compliance certificate in substantially the
   form of Exhibit III signed by its Chief Financial Officer or Treasurer
   showing the calculations necessary to determine compliance with this
   Agreement and stating that no Default or Event of Default exists, or
   if any Default or Event of Default exists, stating the nature and
   status thereof.

                                       55
   <PAGE>

            (e)  Within 270 days after the close of each Fiscal Year, a
   statement of the Unfunded Liabilities of each Single Employer Plan,
   certified as correct by an actuary enrolled under ERISA.

            (f) As soon as possible and in any event within 20 days
   after the Company knows that any Reportable Event has occurred with
   respect to any Plan, a statement, signed by the Chief Financial
   Officer or Treasurer of the Company, describing said Reportable Event
   and the action which the Company proposes to take with respect
   thereto.

            (g)  As soon as possible and in any event within 20 days
   after receipt by the Company, a copy of (a) any notice or claim to the
   effect that the Company or any of its Subsidiaries is or may be liable
   to any Person as a result of the release by the Company, any of its
   Subsidiaries, or any other Person of any toxic or hazardous waste or
   substance into the environment, and (b) any notice alleging any
   violation of any federal, state or local environmental, health or
   safety law or regulation by the Company or any of its Subsidiaries,
   which, in either case, could reasonably be expected to have a Material
   Adverse Effect.

            (h)  Promptly upon the furnishing thereof to the
   shareholders of the Company, copies of all financial statements,
   reports and proxy statements so furnished.

            (i) Promptly upon the filing thereof, copies of all
   registration statements and annual, quarterly, monthly or other
   regular reports which the Company or any of its Subsidiaries files
   with the Securities and Exchange Commission.

            (j)  Such other information (including non-financial
   information) as the Agent or any Lender may from time to time
   reasonably request.

            5.2  Use of Proceeds.  The Company will, and will cause
   each Subsidiary to, use the proceeds of the Loans in accordance
   with Section 2.6. The Company will not, nor will it permit any
   Subsidiary to, use any of the proceeds of the Loans to purchase or
   carry any Margin Stock.

            5.3  Notice of Default.  The Company will give prompt
   notice in writing to the Lenders of the occurrence of any Default or
   Event of Default and of any other development, financial or
   otherwise (including, without limitation, developments with respect
   to Year 2000 Issues), which could reasonably be expected to have a
   Material Adverse Effect.

                                       56
   <PAGE>

            5.4  Conduct of Business.  The Company will, and will cause
   each Subsidiary to, carry on and conduct its business only in fields
   of enterprise substantially the same as or reasonably related to the
   fields of enterprise in which it is presently conducted (after giving
   effect to the PSD Acquisition) and do all things necessary to remain
   duly incorporated or organized, validly existing and (to the extent
   such concept applies to such entity) in good standing as a domestic
   corporation, partnership or limited liability company in its
   jurisdiction of incorporation or organization, as the case may be,
   and maintain all requisite authority to conduct its business in each
   jurisdiction in which its business is conducted, in each case, except
   to the extent that a failure to do so could not reasonably be
   expected to have a Material Adverse Effect.

            5.5  Taxes.  The Company will, and will cause each Subsidiary
   to, timely file complete and correct United States federal, if
   applicable, and applicable foreign, state and local tax returns
   required by law and pay when due all taxes, assessments and governmental
   charges and levies upon it or its income, profits or Property which
   if unpaid might become a Lien on any of its Property, except those which
   are being contested in good faith by appropriate proceedings and with
   respect to which adequate reserves have been set aside if and to the
   extent required by Agreement Accounting Principles.

            5.6  Insurance.  The Company shall maintain for itself and
   its Domestic Subsidiaries, or shall cause each of its Domestic
   Subsidiaries to maintain, in full force and effect the insurance
   policies and programs listed on Schedule 4.21 or substantially similar
   policies and programs or other policies and programs as reflect
   coverage that is reasonably consistent with prudent industry practice.
   In the event the Company or any of its Domestic Subsidiaries, at any
   time or times hereafter shall fail to obtain or maintain any of the
   policies or insurance required herein or to pay any premium in whole
   or in part relating thereto within ten days after written notice from
   the Agent, then the Agent, without waiving or releasing any
   obligations or resulting Event of Default hereunder, may at any time
   or times thereafter so long as such failure shall continue (but shall
   be under no obligation to do so) obtain and maintain such policies of
   insurance and pay such premiums and take any other action with respect
   thereto which the Agent deems advisable.  All sums so disbursed by
   the Agent shall constitute part of the Obligations, payable as
   provided in this Agreement.

            5.7  Compliance with Laws.   The Company will, and will cause
   each Subsidiary to, comply with all laws, rules, regulations, orders,
   writs, judgments, injunctions, decrees or awards to which it may be
   subject including, without limitation, all Environmental Laws, the

                                       57
   <PAGE>

   violation of which could reasonably be expected to have a Material
   Adverse Effect and/or result in the creation of any Lien not
   permitted by Section 6.6.

            5.8  Maintenance of Properties.  The Company will, and
   will cause each Subsidiary to, do all things necessary and
   commercially reasonable to maintain, preserve, protect and keep its
   Property in good repair, working order and condition, ordinary wear
   and tear excepted, and make all necessary and proper repairs,
   renewals and replacements so that its business carried on in
   connection therewith may be properly conducted at all times, in
   each case except to the extent that a failure to do so could not
   reasonably be expected to have a Material Adverse Effect.

            5.9  Inspection.  The Company will, and will cause each
   Subsidiary to, permit the Agent and the Lenders, by their
   respective representatives and agents, to inspect any of the
   Property, books and financial records of the Company and each
   Subsidiary, to examine and make copies of the books of accounts and
   other financial records of the Company and each Subsidiary, and to
   discuss the affairs, finances and accounts of the Company and each
   Subsidiary with, and to be advised as to the same by, their respective
   officers, in each case upon reasonable advance notice and at such
   reasonable times (during normal business hours) and intervals as the
   Agent may designate.

            5.10  Year 2000.  The Company will take and will cause each
   of its Subsidiaries to take all such actions as are reasonably
   necessary to successfully implement the Year 2000 Program and to assure
   that Year 2000 Issues will not have a Material Adverse Effect.  At the
   request of the Agent, the Company will provide a description of the
   Year 2000 Program, together with any updates or progress reports with
   respect thereto.

            5.11  Additional Guarantors.  If at any time on or after the
   Closing Date, any one or more Domestic Subsidiaries shall constitute
   a Material Domestic Subsidiary, the Company shall promptly notify the
   Agent thereof, which notice shall specify the date as of which such
   Domestic Subsidiary or Subsidiaries became a Material Domestic Subsidiary.
   (Each reference hereafter in this Section 5.11 to a Material Domestic
   Subsidiary shall mean each Subsidiary constituting such Material Domestic
   Subsidiary.)  Within 90 days after the date specified in such notice,
   the Company shall cause such Material Domestic Subsidiary to execute and
   deliver to the Agent a Guaranty, together with such supporting
   documentation, including corporate resolutions and/or opinions of
   counsel with respect to such additional Guaranty, as may be reasonably
   required by the Agent.  Notwithstanding the foregoing, (i) if the Company

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   <PAGE>

   acquires a Material Domestic Subsidiary pursuant to a Permitted
   Acquisition, the Company may, as an alternative to complying with the
   preceding sentence, within 90 days after the consummation of such
   Permitted Acquisition, cause such Material Domestic Subsidiary to merge
   into, or to transfer all or substantially all of its assets to, the
   Company or a Guarantor, and (ii) the Company shall comply with the
   preceding sentence or, in the alternative, the preceding clause (i),
   with respect to Sanofi Diagnostics Pasteur, Inc. and Genetic Systems
   within 180 days after the Closing Date.  In addition, if any Subsidiary
   of the Company guarantees the obligations of the Company under the
   Senior Secured Credit Agreement, such Subsidiary shall also deliver
   a Guaranty to the Agent, together with such supporting documentation,
   including corporate resolutions and/or opinions of counsel with respect
   to such additional Guaranty, as may be reasonably required by the Agent.

            5.12  Exchange of Rollover Bridge Notes.  The Company will, on
   or before the fifth Business Day following the written request (the
   "Exchange Request") of the holder of any Rollover Bridge Note (or
   beneficial owner of a portion thereof):

           (a)  Execute and deliver, cause each Guarantor to execute
   and deliver, and cause a bank or trust company acting as trustee
   thereunder to execute and deliver, the Senior Subordinated Indenture,
   if such Senior Subordinated Indenture has not previously been executed
   and delivered, and

           (b)  Execute and deliver to such holder or beneficial owner
   in accordance with the Senior Subordinated Indenture a note in the
   form attached to the Senior Subordinated Indenture (the "Exchange
   Notes") bearing an increasing interest rate equal to the Rollover
   Bridge Loan Rate in exchange for such Rollover Bridge Note dated the
   date of the issuance of such Exchange Note, payable to the order of
   such holder or owner, as the case may be, in the same principal amount
   as such Rollover Bridge Note (or portion thereof) being exchanged, and
   cause each Guarantor to endorse its guarantee thereon.

            The Exchange Request shall specify the principal amount of
   the Rollover Bridge Notes to be exchanged pursuant to this
   Section 5.12 which shall be at least $5,000,000 and integral multiples
   of $500,000 in excess thereof (or, in the case any Lender holds
   Rollover Bridge Notes with an outstanding amount less than $5,000,000,
   such remaining amount).  Rollover Bridge Notes delivered to the
   Company under this Section 5.12 in exchange for Exchange Notes shall
   be cancelled by the Company and the corresponding amount of the
   Rollover Bridge Loan deemed repaid and the Exchange Notes shall be
   governed by and construed in accordance with the terms of the Senior
   Subordinated Indenture.

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   <PAGE>

            5.13  Permanent Securities.

            (a)  Upon the request of BOCM, the Company will issue
   Permanent Securities in such amount as will generate gross proceeds
   equal to an amount sufficient to repay all outstanding Bridge Notes,
   Rollover Bridge Notes and Exchange Notes and all related fees and
   expenses.  Such securities shall have such form, term, guarantees,
   covenants, default and subordination provisions and other terms as are
   customary for securities of the type issued and may be issued in one
   or more tranches, all as determined by BOCM, in its sole discretion.
   BOCM will act as the exclusive managing underwriter, initial purchaser
   or placement agent (as it shall determine in its sole discretion) and
   ABN Amro Bank N.V. will act as the exclusive co-manager in connection
   with such issuance of Permanent Securities pursuant to the provisions
   of the Engagement Letter.  The Company will do, and, to the extent
   within its control, will cause the Target to do, all things reasonably
   required in the opinion of BOCM, in connection with the sale of the
   Permanent Securities.  In addition, BOCM may require the Company to
   execute an underwriting or purchase agreement providing for the
   issuance of Permanent Securities contemplated by this Section 5.13
   substantially in the form of BOCM's standard underwriting or purchase
   agreement, modified as appropriate to reflect the terms of the
   transactions contemplate thereby and containing such terms, covenants,
   conditions, representations, warranties and indemnities as are
   customary in similar transactions and providing for the delivery of
   legal opinions, comfort letters and officers' certificates, all in
   form and substance reasonably satisfactory to BOCM, as well as such
   other terms and conditions as BOCM reasonably considers appropriate in
   light of the then prevailing market conditions applicable to similar
   financings.

            (b)  The Company will use its reasonable best efforts to
   cause the Permanent Securities to be rated by two nationally
   recognized statistical rating organizations (as such term is defined
   in Rule 436(g)(2) under the Securities Act).

            5.14  Lenders Meeting.  The Company will participate in
   a meeting with the Lenders once during each Fiscal Year to be held at
   a location and a time selected by the Company and reasonably satisfactory
   to the Lenders.

            5.15  Note Documents.  Each of the Company and the Guarantors
   shall, on the date it executes and delivers any Note Document, have the
   full corporate (or equivalent) power, authority and capacity to do so
   and to perform all of its obligations to be performed thereunder; all
   corporate (or equivalent) and other acts, conditions and things required
   to be done and performed or to have occurred prior to such execution and
   delivery to constitute them as valid and legally binding obligations of
   the Company enforceable against the Company and the Guarantors in

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   <PAGE>

   accordance with their respective terms except to the extent that the
   enforceability thereof may be limited by applicable bankruptcy,
   insolvency, reorganization or similar laws affecting the enforcement
   of creditors' rights generally or by general principles of equity
   (regardless of whether such enforcement is considered in a proceeding in
   equity or at law), shall have been done and performed and shall have
   occurred in due compliance with all applicable laws; on the date of such
   execution and delivery by the Company and the Guarantors, each Note
   Document shall constitute a legal, valid, binding and unconditional
   obligation of the Company or the Guarantor, as the case may be,
   enforceable against the Company or such Guarantors, as the case may be,
   in accordance with its respective terms, except to the extent that the
   enforceability thereof may be limited by applicable bankruptcy,
   insolvency, reorganization or similar laws affecting the enforcement of
   creditors' rights generally or by general principles of equity
   (regardless of whether such enforcement is considered in a proceeding
   in equity or at law).

            5.16  Syndication.  The Company shall actively assist, and shall
   use reasonable best efforts to cause the Target to actively assist,
   FCCC and BOCM in achieving syndication of the Bridge Loan Commitment and
   the Bridge Loan in a manner reasonably satisfactory to FCCC.  In the event
   that such syndication cannot be achieved in a manner reasonably
   satisfactory to FCCC under the terms and conditions set forth herein, the
   Company shall cooperate with FCCC in developing an alternative structure
   that will permit syndication of the Bridge Loan Commitment and the Bridge
   Loan in a manner reasonably satisfactory to FCCC and the Company.
   Syndication of the Bridge Loan Commitment and the Bridge Loan will be
   accomplished by a variety of means, including direct contact during the
   syndication between senior management and advisors of the Company and the
   Target and the proposed Lenders.  To assist FCCC and BOCM in their
   syndication efforts, the Company shall (a) provide and cause its advisors
   and (to the extent subject to its control) the advisors of the Target to
   provide FCCC and BOCM and the other Lenders upon request with all
   information reasonably deemed necessary by FCCC and BOCM to complete
   syndication, including but not limited to information and evaluations
   prepared by the Company and the Target and their advisors, or on their
   behalf, relating to the Transactions, provided that the Company does not
   hereby waive its attorney-client privilege, (b) assist, and use
   reasonable best efforts to cause the Target to assist, FCCC and BOCM
   in the preparation of the Offering Memorandum described in Section
   3.1(q) and (c) otherwise assist, and use reasonable best efforts to
   cause the Target to assist, FCCC and BOCM in their syndication
   efforts, including making available officers and advisors of the
   Company and the Target from time to time to attend and make

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   <PAGE>

   presentations regarding the business and prospects of the Company and
   the Target, as appropriate, at a meeting or meetings of prospective
   Lenders.

            It is understood and agreed that FCCC and BOCM, after
   consultation with the Company, will manage and control all aspects of
   the syndication, including decisions as to the selection of proposed
   Lenders and any titles offered to proposed Lenders, when commitments
   will be accepted and the final allocations of the commitments among
   the Lenders.  FCCC agrees to use its reasonable efforts to satisfy the
   Company's preferences with respect to the selection of proposed
   Lenders and the final allocation of the commitments among the Lenders.

   SECTION 6. NEGATIVE COVENANTS

            The Company covenants and agrees that until the satisfaction
   in full of the Loans and the Notes and all other Obligations due under
   this Agreement it will fully and timely perform all covenants in this
   Section 6.

            6.1  Dividends.  The Company will not, nor will it permit
   any Subsidiary to, declare or pay any dividends or make any distributions
   on its capital stock (other than dividends payable in its own capital
   stock) or redeem, repurchase or otherwise acquire or retire any of its
   Equity Interests at any time outstanding, except that any Subsidiary
   may declare and pay dividends or make distributions to the Company or
   to a Wholly-Owned Subsidiary and excluding share repurchases of the
   Company's capital stock used solely to fund employee stock purchase
   plans and employee stock option plans, provided such share repurchases
   do not exceed $5,000,000 in the aggregate in any fiscal year (including,
   without limitation, the fiscal year ending December 31, 1999).

            6.2  Indebtedness.  The Company will not, nor will it permit
   any Subsidiary to, Incur any Indebtedness, except:

            (a)  The Loans.

            (b)  Indebtedness under the Senior Secured Credit Agreement
   in an amount not to exceed $220,000,000.

            (c)  Indebtedness (other than Indebtedness of Foreign
   Subsidiaries) existing on the date hereof and described in Schedule
   6.2.

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   <PAGE>

            (d)  Indebtedness arising under Rate Management
   Transactions and other Financial Contracts permitted by Section 6.14.

            (e)  Indebtedness of Foreign Subsidiaries not exceeding
   $30,000,000 (or equivalent in foreign currencies) in aggregate
   principal amount at any one time outstanding prior to December 31,
   1999 and $25,000,000 (or equivalent in foreign currencies) in
   aggregate principal amount at any one time outstanding on or after
   December 31, 1999.

            (f)  Factoring of accounts and notes receivable of Foreign
   Subsidiaries, provided that (i) such receivables sold without recourse
   to the selling Foreign Subsidiary shall be sold on commercially
   reasonable terms and (ii) the liabilities of such Foreign Subsidiaries
   with respect to such receivables sold with recourse to the selling
   Foreign Subsidiary shall not exceed $10,000,000 (or equivalent in
   foreign currencies) in the aggregate at any time.

            (g)  Indebtedness constituting Contingent Obligations
   permitted by Section 6.13.

            (h)  Indebtedness incurred pursuant to so-called "synthetic
   lease" transactions ("Synthetic Leases") and Sale and Leaseback
   Transactions, provided that at the time such transaction is entered
   into (A) no Default or Event of Default exists and (B) the Leverage
   Ratio as of the last day of the most recent fiscal quarter for which
   the Company has delivered financial statements pursuant to Section 5.1
   on a pro forma basis as if such Synthetic Lease or Sale and Leaseback
   Transaction were entered into at the beginning of the four-fiscal
   quarter period ending on such day would have been equal to or less
   than 3.00 to 1.

            (i)  Indebtedness of the Company to any Subsidiary or of
   any Guarantor to the Company or any other Guarantor or of any
   Subsidiary that is not a Guarantor to any other Subsidiary that is not
   a Guarantor; provided that if the Company or any Guarantor is the
   obligor on such Indebtedness, such Indebtedness shall be expressly
   subordinate to the payment in full of the Obligations in a manner
   satisfactory in form and substance to the Agent.

            (j)  Other Indebtedness, not otherwise permitted by clauses
   (a) through (i) above, not exceeding $15,000,000 in the aggregate
   outstanding at any one time.

            6.3  Merger.  The Company will not, nor will it permit any
   Subsidiary to, merge or consolidate with or into any other Person,

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   <PAGE>

   except that a Subsidiary may merge (i) into the Company or a
   Wholly-Owned Subsidiary or (ii) in connection with a Permitted
   Acquisition.

            6.4  Sale of Assets.  The Company will not, nor will it permit
   any Subsidiary to, lease, sell or otherwise dispose of its Property to
   any other Person, except:

            (a)  Sales of inventory in the ordinary course of business.

            (b)  Sales by Foreign Subsidiaries of accounts receivable
   and notes receivable permitted by Section 6.2(f).

            (c)  Sales or other dispositions of Property in connection
   with Synthetic Leases and Sale and Leaseback Transactions permitted by
   Section 6.2(h).

            (d)  Equipment or other assets traded in or exchanged for
   replacement assets.

            (e)  Leases, sales or other dispositions of its Property
   (excluding leases, sales or other dispositions permitted under clauses
   (a) through (d) above) that, together with all other Property of the
   Company and its Subsidiaries previously leased, sold or disposed of as
   permitted by this clause (e) during the four-fiscal quarter period
   ending with the fiscal quarter in which any such lease, sale or other
   disposition occurs, do not constitute a Substantial Portion of the
   Property of the Company and its Subsidiaries, provided that during the
   continuance of a Default or an Event of Default, any disposition of
   Property constituting Collateral (as defined in the Senior Secured
   Credit Agreement) pursuant to this clause (e) shall be for
   consideration consisting only of cash and Cash Equivalent Investments.

            6.5  Investments and Acquisitions.  The Company will not,
   nor will it permit any Subsidiary to, make or suffer to exist any
   Investments (including without limitation, loans and advances to, and
   other Investments in, Subsidiaries), or commitments therefor, or to
   create any Subsidiary or to become or remain a partner in any partnership
   or joint venture, or to make any Acquisition of any Person, except:

            (a)  Cash Equivalent Investments.

            (b)  Existing Investments in Subsidiaries and other
   Investments in existence on the date hereof and described in Schedule
   6.5.

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   <PAGE>

            (c)  Investments by the Company or any Guarantor in
   Subsidiaries other than Guarantors, in addition to Investments
   permitted by clause (b) above, not to exceed in the aggregate during
   the term of this Agreement the sum of (i) $15,000,000 (or equivalent
   in foreign currencies) plus (ii) the cumulative amount of repayments
   of principal, returns of capital and dividends received by the Company
   or any Guarantor from Subsidiaries other than Guarantors on
   Investments (including existing Investments) in such Subsidiaries.

            (d)  Investments in the Company and in Subsidiaries that
   are Guarantors, and Investments by Subsidiaries that are not
   Guarantors in other Subsidiaries that are not Guarantors.

            (e)  Investments constituting Rate Management Transactions
   and Financial Contracts permitted by Section 6.14.

            (f)  Permitted Acquisitions and Investments in joint
   ventures, provided that no Default or Event of Default exists before
   or after giving effect to such Permitted Acquisition or such joint
   venture Investment.

            (g)  Other Investments not otherwise permitted by clauses
   (a) through (f) above, not exceeding in the aggregate during the term
   of this Agreement the sum of (i) $10,000,000 plus (ii) the cumulative
   amount of repayments of principal, returns of capital and dividends
   received by the Company or any Guarantor on Investments made pursuant
   to this clause (g).

            6.6 Liens.  The Company will not, nor will it permit any
   Subsidiary to, create, incur, or suffer to exist any Lien in, of or
   on the Property of the Company or any of its Subsidiaries, except:

            (a)  Liens securing Indebtedness and other obligations
   under the Senior Secured Credit Agreement.

            (b)  Liens for taxes, assessments or governmental charges
   (other than Liens imposed by the PBGC) or levies on its Property if
   the same shall not at the time be delinquent or thereafter can be paid
   without penalty, or are being contested in good faith and by
   appropriate proceedings and for which adequate reserves shall have
   been set aside on its books if and to the extent required by Agreement
   Accounting Principles.

            (c)  Liens imposed by law, such as carriers',
   warehousemen's and mechanics' liens and other similar liens arising in

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   <PAGE>

   the ordinary course of business which secure payment of obligations
   not more than 60 days past due or which are being contested in good
   faith by appropriate proceedings and for which adequate reserves shall
   have been set aside on its books if and to the extent required by
   Agreement Accounting Principles.

            (d)  Liens arising out of pledges or deposits under
   worker's compensation laws, unemployment insurance, old age pensions,
   or other social security or retirement benefits, or similar
   legislation.

            (e)  Utility easements, building restrictions and such
   other encumbrances or charges against real property as are of a nature
   generally existing with respect to properties of a similar character
   and which do not in any material way affect the marketability of the
   same or interfere with the use thereof in the business of the Company
   or its Subsidiaries.

            (f)  Liens granted to or for the benefit of any of the
   agent or any lender under the Senior Secured Credit Agreement, or any
   of their respective Affiliates, pursuant to any Rate Management
   Transaction.

            (g)  Liens on property of Foreign Subsidiaries in
   connection with banker's acceptances with maturities not in excess of
   180 days.

            (h)  Liens on accounts and notes receivable of Foreign
   Subsidiaries securing loans and advances to Foreign Subsidiaries
   permitted by Section 6.2.

            (i)  Liens against equipment, property, or plant leased by
   the Company or any Subsidiary in favor of the lessor thereof.

            (j)  Purchase money Liens to secure Indebtedness permitted
   hereunder, and extensions, renewals and refinancing thereof so long as
   the principal amounts thereof are not increased.

            (k)  Liens to secure the performance of tenders, statutory
   obligations, bids, leases, government contracts, performance and
   surety bonds and other similar obligations in the ordinary course of
   business.

            (l)  Liens on documents and related property arising in
   connection with trade letters of credit in the ordinary course of
   business.

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   <PAGE>


            (m)  Liens (excluding liens permitted under clauses (a)
   through (l) above) existing on the date hereof, the aggregate amount
   of liabilities secured by which does not exceed $5,000,000.  All such
   Liens securing liabilities in excess of $250,000 are listed on
   Schedule 6.6 hereto.

            (n)  Liens (excluding Liens permitted under clauses (a)
   through (m) above) to secure obligations of the Company or any
   Subsidiary, the principal amount of which does not exceed $15,000,000
   at any one time.

            6.7  Capital Expenditures.  The Company will not, nor will
   it permit any Subsidiary to, expend, or be committed to expend, in
   excess of $40,000,000 for Capital Expenditures during any one Fiscal
   Year, commencing with Fiscal Year 1999, in the aggregate for the Company
   and its Subsidiaries on a consolidated basis; provided, however, that
   for each Fiscal Year after 1999, such aggregate amount shall be increased
   by an amount (the "Carryover Amount") that is the lesser of (i) the
   excess, if any, of (A) the maximum aggregate amount of Capital
   Expenditures (including any Carryover Amount) permitted pursuant to this
   Section 6.7 for the immediately preceding fiscal year over (B) the
   aggregate amount of actual Capital Expenditures during such preceding
   Fiscal Year and (ii) $40,000,000.  Notwithstanding the foregoing and
   in addition thereto, the Company and its Subsidiaries may make Capital
   Expenditures (1) in an amount equal to Available Net Cash Proceeds (as
   defined in the Senior Secured Credit Agreement) in accordance with
   Section 2.7.2(a) of the Senior Secured Credit Agreement and (2) in an
   amount equal to Excess Cash Flow (as defined in the Senior Secured
   Credit Agreement) on a cumulative basis to the extent not required
   to be applied as a mandatory prepayment of the loans under the Senior
   Secured Credit Agreement.

            6.8  Limitation on Dividend and Other Payment Restrictions
   Affecting Subsidiaries.

            (a)  The Company shall not (and shall not suffer or permit
   any of its Domestic Subsidiaries to), directly or indirectly, enter
   into any agreement with any Person which prohibits or limits the ability
   of any of the Company or any of its Domestic Subsidiaries to create,
   incur, assume or suffer to exist any Lien upon any of its Property or
   revenues, whether now owned or hereafter acquired, other than (i) this
   Agreement and the other Loan Documents, (ii) the Senior Secured Credit
   Agreement, (iii) Lien restrictions in a Capitalized Lease or other
   purchase money financing arrangement permitted hereunder relating to
   the asset financed thereunder and (iv) purchase agreements, license
   agreements, leases and other similar agreements entered into in the
   ordinary course of business that prohibit a Lien on the asset or
   assets subject to such agreements.

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   <PAGE>

            (b)  The Company shall not, and shall not permit any of its
   Subsidiaries to, directly or indirectly, create, assume or suffer to
   exist any consensual restriction on the ability of any of its
   Subsidiaries to pay dividends or make other distributions to or on
   behalf of, or to pay any obligation to or on behalf of, or otherwise
   to transfer assets or Property to or on behalf of, or make or pay
   loans or advances to or on behalf of, the Company or any of its
   Subsidiaries, except:

            (i)  restrictions imposed by this Agreement and the
   other Loan Documents;

            (ii)  restrictions imposed by the Senior Credit
   Agreement;

            (iii)  restrictions imposed by applicable law;

            (iv)  existing restrictions under Indebtedness of any
   Subsidiary outstanding on the Closing Date (after giving effect to the
   PSD Acquisition);

            (v)  restrictions under any Acquired Indebtedness not
   Incurred in violation of any agreement (including any Equity Interest)
   relating to any Property, asset or business acquired by the Company or
   any of its Subsidiaries, which restrictions in each case existed at
   the time of the Acquisition, were not put in place in connection with
   or in anticipation of such Acquisition and are not applicable to any
   Person, other than the Person acquired, or to any Property, asset or
   business, other than the Property, assets and business so acquired;

            (vi)  restrictions with respect solely to any of its
   Subsidiaries imposed pursuant to a binding agreement which has been
   entered into for the sale or disposition of all or substantially all
   of the Equity Interests or assets of such Subsidiary; provided, that
   such restrictions apply solely to the Equity Interests or assets of
   such Subsidiary which are being sold;

            (vii)  restrictions on transfer contained in purchase
   money Indebtedness; provided, that such restrictions relate only to
   the transfer of the Property acquired with the proceeds of such
   purchase money Indebtedness;

            (viii)  provisions with respect to the disposition or
   distribution of assets or Property in joint venture agreements, asset
   sale agreements, stock sale agreements and other similar agreements
   entered into in the ordinary course of business;

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   <PAGE>


            (ix)  restrictions on cash or other deposits or net
   worth imposed by customers under contracts entered into in the
   ordinary course of business;

            (x)  in connection with and pursuant to permitted
   Refinancings, replacements of restrictions imposed pursuant to clauses
   (ii), (iv), (v) or (vii) above or this clause (ix) that are not more
   restrictive taken as a whole than those being replaced and do not
   apply to any other Person or assets than those that would have been
   covered by the restrictions in the Indebtedness so Refinanced; and

            (xi)  restrictions contained in Indebtedness Incurred
   by a Foreign Subsidiary in accordance with this Agreement; provided,
   that such restrictions relate only to one or more Foreign
   Subsidiaries.

            Notwithstanding the foregoing, (A) customary provisions
   restricting subletting or assignment of any lease entered into in the
   ordinary course of business, consistent with industry practice and (B)
   any asset subject to a Lien which is not prohibited to exist with
   respect to such asset pursuant to the terms of this Agreement may be
   subject to customary restrictions on the transfer or disposition
   thereof pursuant to such Lien.

            6.9  Affiliates.  The Company will not, and will not permit
   any Subsidiary to, enter into any transaction (including, without
   limitation, the purchase or sale of any Property or service) with,
   or make any payment or transfer to, any Affiliate (other than the
   Company and its Wholly-Owned Subsidiaries) except in the ordinary
   course of business and pursuant to the reasonable requirements of
   the Company's or such Subsidiary's business and upon fair and
   reasonable terms no less favorable to the Company or such Subsidiary
   than the Company or such Subsidiary would obtain in a comparable
   arms-length transaction.

            6.10  Unfunded Liabilities.  Except as could not reasonably
   be expected, individually or in the aggregate, to have a Material
   Adverse Effect, the Company will not permit any Unfunded Liabilities
   to exist under any Plan.

            6.11  Limitation on Modifications of Certain Documents.  The
   Company shall not, and shall not permit any of its Subsidiaries to, amend,
   modify or waive, or permit the amendment, modification or waiver of,
   any provision of any of the Related Documents.

            6.12  Sale and Leaseback Transactions.  The Company will not,
   nor will it permit any Subsidiary to, enter into or suffer to exist any

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   <PAGE>

   Sale and Leaseback Transaction other than Sale and Leaseback Transactions
   and Synthetic Leases permitted by Section 6.2(h).

            6.13  Contingent Obligations.  The Company will not, nor will
   it permit any Subsidiary to, make or suffer to exist any Contingent
   Obligation (including, without limitation, any Contingent Obligation
   with respect to the obligations of a Subsidiary), except (i) by
   endorsement of instruments for deposit or collection in the ordinary
   course of business, (ii) guaranties of Indebtedness permitted by
   Section 6.2, (iii) guaranties by the Company or any Subsidiary of
   employee credit card obligations in the ordinary course of business,
   (iv) recourse obligations in connection with the factoring of accounts
   and notes receivable of Foreign Subsidiaries,  (v) guaranties and other
   Contingent Obligations of the Company or any Subsidiary with respect
   to obligations of any Subsidiary and (vi) other Contingent Obligations
   not otherwise permitted by clauses (i) through (v) above not exceeding
   $2,000,000 in the aggregate outstanding at any one time.

            6.14  Financial Contracts.  The Company will not, nor will it
   permit any Subsidiary to, enter into or remain liable upon any
   Financial Contract, except (i) Rate Management Transactions required
   pursuant to the terms of the Senior Secured Credit Agreement and (ii)
   other Financial Contracts pursuant to which the Company or any
   Subsidiary has hedged its reasonably estimated interest rate,
   foreign currency or commodity exposure.

            6.15  Refinancing of the Loans in Part.  The Company shall not,
   nor shall the Company cause or permit any of its Subsidiaries to, Incur
   any Indebtedness to Refinance the Loans in part other than the Permanent
   Securities or the Exchange Notes.

            6.16  Senior Subordinated Indebtedness. Neither the Company
   nor any of the Guarantors shall, directly or indirectly, Incur any
   Indebtedness (other than the Notes, the Exchange Notes, the Permanent
   Securities and Indebtedness between the Company and its Wholly Owned
   Subsidiaries) that is by its terms (or by the terms of any agreement
   governing such Indebtedness) subordinated in right of payment to any
   other Indebtedness of the Company or of such Guarantor unless such
   Indebtedness is also by its terms (or by the terms of any agreement
   governing such Indebtedness) made expressly subordinate to the Loans
   and the Notes and the Guarantees to the same extent and in the same
   manner as such Loans and Notes and Guarantees are subordinated to the
   Senior Secured Credit Agreement.

            6.17  Leverage Ratio.

              (a)  The Company will not permit the ratio, determined as of
   the end of each of its fiscal quarters, of (i) Consolidated Funded

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   Indebtedness to (ii) Consolidated EBITDA for the then most-recently
   ended four fiscal quarters to be greater than 5.00 to 1.

              (b)  In the event that the Company or any Subsidiary shall
   have consummated a Permitted Acquisition or Investment in a joint
   venture during any four fiscal quarter period for which the Leverage
   Ratio covenant contained in this Section 6.17 is calculated, the
   Leverage Ratio shall be calculated as if such Permitted Acquisition or
   Investment (including any Indebtedness Incurred in connection
   therewith) had been consummated on the first day of such four fiscal
   quarter period, provided that the Company shall not include such
   Permitted Acquisition or Investment in the calculation of Consolidated
   EBITDA, unless the Company shall have delivered to the Lenders, at or
   prior to the time financial statements as of the last day of such four
   fiscal quarter period are delivered to the Lenders pursuant to Section
   5.1, audited financial statements of the acquired business or Person
   or joint venture, as the case may be, stated in Dollars and presented
   in conformity with GAAP, and covering the period from the first day of
   such four fiscal quarter period to the actual date of the consummation
   of such Permitted Acquisition or Investment.

   ECTION 7. EVENTS OF DEFAULT

            7.1  Events of Default.  The occurrence of any one or more of
   the following events shall constitute an Event of Default:

            (a)  Any representation or warranty made or deemed made by
   or on behalf of the Company or any of its Subsidiaries to the Lenders
   or the Agent under or in connection with this Agreement, any Loan, or
   any certificate or information delivered in connection with this
   Agreement or any other Loan Document shall be materially false on the
   date as of which made.

            (b)  Nonpayment of principal of any Loan when due, or
   nonpayment of interest upon any Loan or of any commitment fee or other
   obligations under any of the Loan Documents within five days after the
   same becomes due.

            (c)  The breach by the Company of any of the terms or
   provisions of Section 5.2 or Section 6; or the breach by the Company
   of any of the terms and conditions of Section 5.1, 5.3, 5.6 or 5.9
   which is not remedied within ten days.

            (d)  The breach by the Company (other than a breach which
   constitutes an Event of Default under another subsection of this
   Section 7) of any of the terms or provisions of this Agreement or any

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   other Loan Document which is not remedied within thirty days after
   written notice from the Agent or the Required Lenders.

            (e)  (i) Failure of the Company or any of its Subsidiaries
   to pay when due any Indebtedness (other than Indebtedness owing by the
   Company to any Subsidiary or by any Subsidiary to the Company or
   another Subsidiary and other than Rate Management Obligations)
   outstanding in a principal amount aggregating in excess of $5,000,000
   ("Material Indebtedness"); or the default by the Company or any of its
   Subsidiaries in the performance (beyond the applicable grace period
   with respect thereto, if any) of any term, provision or condition
   contained in any agreement under which any such Material Indebtedness
   was created or is governed, or any other event shall occur or
   condition exist, the effect of which default or event is to cause, or
   to permit the holder or holders of such Material Indebtedness to
   cause, such Material Indebtedness to become due prior to its stated
   maturity; or any Material Indebtedness of the Company or any of its
   Subsidiaries then outstanding in a principal amount in excess of
   $2,500,000 shall be declared to be due and payable or required to be
   prepaid or repurchased (other than by a regularly scheduled payment
   and other than in connection with the refinancing of the Bridge Loan
   with the proceeds of the Permanent Securities) prior to the stated
   maturity thereof; or the Company or any of its Subsidiaries shall not
   pay, or shall admit in writing its inability to pay, its debts
   generally as they become due; or (ii) the occurrence of an early
   termination under any Rate Management Transaction resulting from (A)
   any event of default under such Rate Management Transaction as to
   which the Company or any Subsidiary is the defaulting party or (B) any
   termination event as to which the Company or any Subsidiary is an
   affected party and, in either event, the termination value or other
   similar obligation owed by the Company or such Subsidiary as a result
   thereof is in excess of $5,000,000 and remains unpaid.

            (f)  The Company or any of its Material Subsidiaries shall
   (i) have an order for relief entered with respect to it under the
   Bankruptcy Law as now or hereafter in effect, (ii) make an assignment
   for the benefit of creditors, (iii) apply for, seek, consent to, or
   acquiesce in, the appointment of a receiver, custodian, trustee,
   examiner, liquidator or similar official for it or any Substantial
   Portion of its Property, (iv) institute any proceeding seeking an
   order for relief under the Bankruptcy Law as now or hereafter in
   effect or seeking to adjudicate it a bankrupt or insolvent, or seeking
   dissolution, winding up, liquidation, reorganization, arrangement,
   adjustment or composition of it or its debts under any Bankruptcy Law
   or fail to file (by the deadline for such filing) an answer or other
   pleading denying the material allegations of any such proceeding filed
   against it, (v) take any corporate or partnership action to authorize

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   or effect any of the foregoing actions set forth in this Section
   7.1(f) or (vi) fail to contest in good faith and in a reasonably
   timely manner any appointment or proceeding described in Section
   7.1(g).

            (g)  Without the application, approval or consent of the
   Company or any of its Material Subsidiaries, a receiver, trustee,
   examiner, liquidator or similar official shall be appointed for the
   Company or any of its Material Subsidiaries or any Substantial Portion
   of its Property, or a proceeding described in Section 7.1(f)(iv) shall
   be instituted against the Company or any of its Material Subsidiaries
   and in each case such appointment continues undischarged or such
   proceeding continues undismissed or unstayed for a period of 60
   consecutive days.

            (h)  Any court, government or governmental agency shall
   condemn, seize or otherwise appropriate, or take custody or control
   of, all or any portion of the Property of the Company and its
   Subsidiaries which, when taken together with all other Property of the
   Company and its Subsidiaries so condemned, seized, appropriated, or
   taken custody or control of, during the twelve-month period ending
   with the month in which any such action occurs, constitutes a
   Substantial Portion.

            (i)  The Company or any of its Subsidiaries shall fail
   within 30 days to pay, bond or otherwise discharge one or more (i)
   judgments or orders for the payment of money (except to the extent
   covered by insurance as to which the insurer has not disclaimed
   coverage) in excess of $5,000,000 (or the equivalent thereof in
   currencies other than Dollars) in the aggregate, or (ii) nonmonetary
   judgments or orders which, individually or in the aggregate, could
   reasonably be expected to have a Material Adverse Effect, which
   judgment(s), in any such case, is/are not stayed on appeal or
   otherwise being appropriately contested in good faith in a reasonably
   timely manner.

            (j)  The Company or any other member of the Controlled
   Group shall have been notified by the sponsor of a Multiemployer Plan
   that it has incurred withdrawal liability to such Multiemployer Plan
   in an amount which, when aggregated with all other amounts required to
   be paid to Multiemployer Plans by the Company or any other member of
   the Controlled Group as withdrawal liability (determined as of the
   date of such notification), could reasonably be expected to have a
   Material Adverse Effect.

            (k)  The Company or any other member of the Controlled
   Group shall have been notified by the sponsor of a Multiemployer Plan
   that such Multiemployer Plan is in reorganization or is being

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   <PAGE>

   terminated, within the meaning of Title IV of ERISA, if as a result of
   such reorganization or termination the aggregate annual contributions
   of the Company and the other members of the Controlled Group (taken as
   a whole) to all Multiemployer Plans which are then in reorganization
   or being terminated have been or will be increased over the amounts
   contributed to such Multiemployer Plans for the respective plan years
   of each such Multiemployer Plan immediately preceding the plan year in
   which the reorganization or termination occurs by an amount which
   could reasonably be expected to have a Material Adverse Effect.

            (l)  The Company or any of its Subsidiaries shall (i) be
   the subject of any order by any Governmental Authority or any judicial
   determination of liability pertaining to the release by the Company,
   any of its Subsidiaries or any other Person of any toxic or hazardous
   waste or substance into the environment, or (ii) violate any
   Environmental Law, which, in the case of an event described in clause
   (i) or clause (ii), could reasonably be expected to have a Material
   Adverse Effect, taking into account amounts to be paid by third
   parties.

            (m)  Any Guarantor shall take any action to revoke or
   discontinue or to assert the invalidity or unenforceability of any
   Guarantee, or any Guarantor shall deny that it has any further
   liability under any Guarantee to which it is a party, or shall give
   notice to such effect.

            7.2  Acceleration.  If any Event of Default described in
   Section 7.1(f) or 7.1(g) occurs with respect to the Company, the
   obligations of the Lenders to make Loans hereunder shall automatically
   terminate and the Obligations shall immediately become due and payable
   without any election or action on the part of the Agent or any Lender.
   If any other Event of Default occurs, the Required Lenders (or the
   Agent with the consent of the Required Lenders) may terminate or
   suspend the obligations of the Lenders to make Loans, or declare the
   Obligations to be due and payable, or both, whereupon the Obligations
   shall become immediately due and payable, without presentment, demand,
   protest or notice of any kind, all of which the Company hereby
   expressly waives.

            If, within 30 days after acceleration of the maturity of the
   Obligations or termination of the obligations of the Lenders to make
   Loans hereunder as a result of any Event of Default (other than any
   Event of Default as described in Section 7.1(f) or 7.1(g) with respect
   to the Company) and before any judgment or decree for the payment of
   the Obligations due shall have been obtained or entered, the Required
   Lenders (in their sole discretion) shall so direct, the Agent shall,
   by notice to the Company, rescind and annul such acceleration and/or
   termination.

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   <PAGE>

   SECTION 8. SUBORDINATION

             8.1  Obligations Subordinated to Senior Debt of the Company.
   The Lenders covenant and agree that payments of the Obligations by the
   Company shall be subordinated in accordance with the provisions of
   this Section 8 to the prior indefeasible payment in full, in cash or
   Cash Equivalent Investments, of all amounts payable in respect of
   Senior Debt of the Company, whether now outstanding or hereafter created,
   that the subordination is for the benefit of the holders of Senior Debt
   of the Company, and that each holder of Senior Debt of the Company
   whether now outstanding or hereafter Incurred shall be deemed to have
   acquired Senior Debt of the Company in reliance upon the covenants and
   provisions contained in this Agreement.

            8.2  Priority and Payment Over of Proceeds in Certain Events.

            (a)  Subordination on Dissolution, Liquidation or
   Reorganization of the Company.  Upon any payment or distribution of
   assets or securities of the Company of any kind or character, whether
   in cash, property or securities, upon any dissolution or winding up or
   total or partial liquidation or reorganization of the Company, whether
   voluntary or involuntary or in bankruptcy, insolvency, receivership or
   other proceedings, all Senior Debt of the Company shall first be
   indefeasibly paid in full in cash or Cash Equivalent Investments (or
   such payment shall first be duly provided for to the satisfaction of
   the holders of Senior Debt), before the Lenders shall be entitled to
   receive any payment by the Company of any Obligations (other than
   Junior Securities), and upon any such dissolution or winding up or
   liquidation or reorganization, any payment or distribution of assets
   or securities of the Company of any kind or character, whether in
   cash, property or securities (other than Junior Securities), to which
   the Lenders would be entitled except for the provisions of this
   Section 8 shall be made by the Company or by any receiver, trustee in
   bankruptcy, liquidating trustee, agent or other Person making such
   payment or distribution, directly to the holders of the Senior Debt of
   the Company or their representatives to the extent necessary to pay
   all of the Senior Debt of the Company to the holders of such Senior
   Debt of the Company.

            (b)  Subordination on Default on Senior Debt.  Upon the
   maturity of any Senior Debt of the Company by lapse of time,
   acceleration or otherwise, all Senior Debt of the Company then due and
   payable shall first be indefeasibly paid in full in cash or Cash
   Equivalent Investments (or such payment shall first be duly provided
   for to the satisfaction of the holders of Senior Debt), before any
   payment is made by the Company or any Person acting on behalf of the

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   <PAGE>

   Company with respect to the Obligations (other than Junior
   Securities).  No direct or indirect payment by the Company or any
   Person acting on behalf of the Company of any Obligations whether
   pursuant to the terms of the Loans or upon acceleration or otherwise
   shall be made (other than Junior Securities), if at the time of such
   payment, there exists a default (as defined in the document governing
   any Senior Debt of the Company) in the payment of all or any portion
   of any Senior Debt of the Company and such default shall not have been
   cured or waived in writing or the benefits of this sentence waived in
   writing by or on behalf of the holders of such Senior Debt.  In
   addition, during the continuation of any other event of default with
   respect to the Senior Debt of the Company pursuant to which the
   maturity thereof may be accelerated, upon the receipt by the Agent of
   written notice from the Representative of the holders of such Senior
   Debt, no such payment may be made by the Company upon or in respect of
   the Obligations (other than Junior Securities), for a period (a
   "Payment Blockage Period") commencing on the date of receipt of such
   notice and ending 179 days after receipt of such notice (unless such
   Payment Blockage Period shall be terminated by written notice to the
   Agent from such Representative).  Notwithstanding anything herein to
   the contrary, (x) in no event will a Payment Blockage Period or
   successive Payment Blockage Periods with respect to the same payment
   on the Obligations extend beyond 179 days from the date the payment on
   the Obligations was due and (y) only one such Payment Blockage Period
   may be commenced within any 360 consecutive days.  For all purposes of
   this Section 8.2(b), no event of default which existed or was
   continuing on the date of the commencement of any Payment Blockage
   Period with respect to the Senior Debt of the Company initiating such
   Payment Blockage Period shall be, or be made, the basis for the
   commencement of a second Payment Blockage Period by the holders or by
   the Representative of such Senior Debt whether or not within a period
   of 360 consecutive days, unless such event of default shall have been
   cured or waived for a period of not less than 90 consecutive days.

            (c)  Rights and Obligations of the Lenders.  In the event
   that, notwithstanding the foregoing provisions prohibiting such
   payment or distribution, the Agent or any Lender shall have received
   any payment on account of any Obligation (other than as permitted by
   Sections (a) and (b) of this Section 8.2) at a time when such payment
   is prohibited by this Section 8.2, then and in such event such payment
   or distribution shall be received and held in trust for the
   Representative of the holders of the Senior Debt of the Company and
   shall be paid over or delivered to Representative of the holders of
   the Senior Debt of the Company remaining unpaid to the extent
   necessary to pay in full in cash or Cash Equivalent Investments all
   Senior Debt of the Company in accordance with their terms after giving

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   <PAGE>

   effect to any concurrent payment or distribution to the holders of
   such Senior Debt of the Company.

            If payment of the Obligations is accelerated because of an
   Event of Default, the Company shall promptly notify the Representative
   of the holders of Senior Debt of the Company of the acceleration.  If
   any Senior Debt is outstanding, the Company may not make any payment
   on account of such accelerated Obligations until five Business Days
   after such Representative receives notice of such acceleration and,
   thereafter, may pay the Obligations only if this Section 8 otherwise
   permits payment at that time.

            Upon any payment or distribution of assets or securities
   referred to in this Section 8, the Lenders (notwithstanding any other
   provision of this Agreement) shall be entitled to rely upon any order
   or decree of a court of competent jurisdiction in which such
   dissolution, winding up, liquidation or reorganization proceedings are
   pending, and upon a certificate of the receiver, trustee in
   bankruptcy, liquidating trustee, agent or other Person making any such
   payment or distribution, delivered to the Lenders for the purpose of
   ascertaining the Persons entitled to participate in such distribution,
   the holders of Senior Debt of the Company, the amount thereof or
   payable thereon, the amount or amounts paid or distributed thereon and
   all other facts pertinent thereto or to this Section 8.

            The Company shall give written notice to each of the Lenders
   of any default or event of default under any Senior Debt of the
   Company or under any agreement pursuant to which Senior Debt of the
   Company may have been issued, and, in the event of any such event of
   default, shall provide to the Agent the names and addresses of the
   Representatives of holders of such Senior Debt of the Company.

            With respect to the holders and owners of Senior Debt of the
   Company, each Lender undertakes to perform only such obligations on
   the part of such Lender as are specifically set forth in this
   Section 8, and no implied covenants or obligations with respect to the
   holders or owners of Senior Debt of the Company shall be read into
   this Agreement against the Lenders.  The Lenders shall not be deemed
   to owe any fiduciary duty to the holders or owners of Senior Debt of
   the Company or to the agent under the Senior Secured Credit Agreement
   or any Representative of the holders of the Senior Debt of the
   Company.

            8.3  Payments May Be Paid Prior to Dissolution.  Nothing
   contained in this Section 8 or elsewhere in this Agreement shall
   prevent or delay (a) the Company, except under the conditions
   described in Section 8.2, from making payments at any time for the
   purpose of paying Obligations, or from depositing with the Agent any

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   moneys for such payments, or (b) subject to Section 8.2, the
   application by the Agent of any moneys deposited with it for the
   purpose of paying Obligations.

            8.4  Rights of Holders of Senior Debt of the Company Not To
   Be Impaired.  No right of any present or future holder of any
   Senior Debt of the Company to enforce subordination as provided in
   this Section 8 shall at any time in any way be prejudiced or impaired
   by any act or failure to act by any such holder (other than an express
   waiver of subordination or an amendment of this Section 8.4), or by
   any noncompliance by the Company with the terms and provisions and
   covenants herein, regardless of any knowledge thereof any such holder
   may have or otherwise be charged with.  Without in any way limiting
   the generality of the foregoing sentence, such holders of Senior Debt
   of the Company may, at any time and from time to time without
   impairing or releasing the subordination provided in this Section 8 or
   the obligations of the Lender hereunder to the holders of Senior Debt
   of the Company, do any one or more of the following:  (a) change the
   manner, place, terms or time of payment of, or renew or alter, Senior
   Debt of the Company or otherwise amend or supplement in any manner
   Senior Debt of the Company or any instrument evidencing the same or
   any agreement under which any Senior Debt of the Company is
   outstanding; (b) sell, exchange, release, or otherwise deal with any
   property pledged, mortgaged, or otherwise securing Senior Debt of the
   Company or fail to perfect or delay in the perfection of the security
   interest in such property; (c) release any Person liable in any manner
   for the collection of Senior Debt of the Company; and (d) exercise or
   refrain from exercising any rights against the Company or any other
   Person.  Each Lender by purchasing or accepting a Note waives any and
   all notice of the creation, modification, renewal, extension or
   accrual of any Senior Debt of the Company and notice of or proof of
   reliance by any holder or owner of Senior Debt of the Company upon
   this Section 8 and the Senior Debt of the Company shall conclusively
   be deemed to have been Incurred in reliance upon this Section 8, and
   all dealings between the Company and the holders and owners of the
   Senior Debt of the Company shall be deemed to have been consummated in
   reliance upon this Section 8.

            The provisions of this Section 8 are intended to be for the
   benefit of, and shall be enforceable directly by, the holders of the
   Senior Debt of the Company.

            8.5  Subrogation.  Upon the indefeasible payment in full in
   accordance with the terms of Section 8.2 of all amounts payable under
   or in respect of the Senior Debt of the Company, the Lenders shall be
   subrogated to the rights of the holders of such Senior Debt of the

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   Company to receive payments or distributions of assets of the Company
   made on such Senior Debt of the Company until the Obligations shall
   be paid in full in cash or Cash Equivalent Investments to the extent
   set forth herein; and for purposes of such subrogation no payments or
   distributions to holders of such Senior Debt of the Company of any
   cash, property or securities to which the Lenders would be entitled
   except for the provisions of this Section 8, and no payment over
   pursuant to the provisions of this Section 8 to holders of such Senior
   Debt of the Company by the Lenders, shall, as between the Company, its
   creditors other than holders of such Senior Debt of the Company and
   the Lenders, be deemed to be a payment by the Company to or on account
   of such Senior Debt of the Company, it being understood that the
   provisions of this Section 8 are solely for the purpose of defining
   the relative rights of the holders of such Senior Debt of the Company,
   on the one hand, and the Lenders, on the other hand.  A release of any
   claim by any holder of Senior Debt of the Company shall not limit the
   Lenders' rights of subrogation under this Section 8.5.

            If any payment or distribution to which the Lenders would
   otherwise have been entitled but for the provisions of this Section 8
   shall have been applied, pursuant to the provisions of this Section 8,
   to the payment of all amounts payable under the Senior Debt of the
   Company, then and in such case, the Lenders shall be entitled to
   receive from the holders of such Senior Debt of the Company at the
   time outstanding the amount of any such payments or distributions
   received by such holders of Senior Debt of the Company in excess of
   the amount sufficient to pay all Senior Debt of the Company payable
   under or in respect of the Senior Debt of the Company in full in cash
   or Cash Equivalent Investments in accordance with the terms of
   Section 8.2.

            8.6  Obligations of the Company Unconditional.  Nothing
   contained in this Section 8 or elsewhere in this Agreement is intended
   to or shall impair as between the Company and the Lenders the
   obligations of the Company, which are absolute and unconditional, to
   pay to the Lenders the Obligations as and when the same shall become
   due and payable in accordance with their terms, or is intended to or
   shall affect the relative rights of the Lenders and creditors of the
   Company other than the holders of the Senior Debt of the Company, nor
   shall anything herein or therein prevent the Lenders from exercising
   all remedies otherwise permitted by applicable law upon default under
   this Agreement, subject to the rights, if any, under this Section 8 of
   the holders of such Senior Debt of the Company in respect of cash,
   property or securities of the Company received upon the exercise of
   any such remedy.

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   <PAGE>

            The failure to make a payment on account of Obligations by
   reason of any provision of this Section 8 shall not prevent the
   occurrence of an Event of Default under Section 7.

            8.7  Lenders Authorize Agent To Effectuate Subordination.  Each
   Lender hereby authorizes and expressly directs the Agent on its behalf
   to take such action as may be necessary or appropriate to effectuate
   the subordination provided in this Section 8 and appoints the Agent
   its attorney in fact for such purpose, including, without limitation,
   in the event of any dissolution, winding up, liquidation or
   reorganization of the Company (whether in bankruptcy, insolvency,
   receivership, reorganization or similar proceedings or upon an
   assignment for the benefit of creditors or any other similar remedy or
   otherwise) tending towards liquidation of the business and assets of
   the Company, the immediate filing of a claim for the unpaid balance of
   the Obligations in the form required in said proceedings and causing
   said claim to be approved or the actions required to negotiate and/or
   effectuate a restructuring of the Indebtedness represented hereby.  If
   the Agent does not file a proper claim or proof of debt in the form
   required in such proceeding prior to 30 days before the expiration of
   the time to file such claim or claims, then the holders of the Senior
   Debt of the Company are hereby authorized to have the right to file
   and are hereby authorized to file an appropriate claim for and on
   behalf of the Lenders.  In the event of any such proceeding, until the
   Senior Debt of the Company is paid in full in cash or Cash Equivalent
   Investments, without the consent of the holders of a majority in
   principal amount outstanding of Senior Debt of the Company, no Lender
   shall waive, settle or compromise any such claim or claims relating to
   the Obligations that such Lender now or hereafter may have against the
   Company.

   SECTION 9. THE AGENT

            9.1  Appointment.  Each Lender hereby irrevocably designates
   and appoints Banc One Capital Markets, Inc. as Agent of such Lender to
   act as specified herein and in the other Loan Documents, and each Lender
   hereby irrevocably authorizes Banc One Capital Markets, Inc. as the
   Agent to take such action on its behalf under the provisions of this
   Agreement and the other Loan Documents and to exercise such powers and
   perform such duties as are expressly delegated to the Agent by the terms
   of this Agreement and the other Loan Documents, together with such other
   powers as are reasonably incidental thereto.  Notwithstanding any
   provision to the contrary elsewhere in this Agreement or in any other
   Loan Document, the Agent shall not have any duties or responsibilities,
   except those expressly set forth herein or in the other Loan Documents,

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   or any fiduciary relationship with any Lender, and no implied covenants,
   functions, responsibilities, duties, obligations or liabilities shall
   be read into this Agreement or otherwise exist against the Agent.  The
   provisions of this Section 9 are solely for the benefit of the Agent
   and the Lenders, and neither the Company nor any of its Subsidiaries
   shall have any rights as a third party beneficiary of any of the
   provisions hereof.  In performing its functions and duties under this
   Agreement and the other Loan Documents, the Agent shall act solely as
   agent of the Lenders and the Agent does not assume and shall not be
   deemed to have assumed any obligation or relationship of agent or
   trust with or for the Company or any of its Subsidiaries.

            9.2  Delegation of Duties.  The Agent may execute any of its
   duties under this Agreement or any other Loan Document by or through
   agents or attorneys-in-fact and shall be entitled to advice of counsel
   concerning all matters pertaining to such duties.  The Agent shall not
   be responsible for the negligence or misconduct of any agents or
   attorneys-in-fact selected by it with reasonable care.

            9.3  Exculpatory Provisions.  The Agent shall not be (a)
   liable for any action lawfully taken or omitted to be taken by it or
   any Person described in Section 9.2 under or in connection with this
   Agreement or the other Loan Documents (except for its or such Person's
   own gross negligence or willful misconduct as finally determined by a
   court of competent jurisdiction). (b) responsible in any manner to any
   of the Lenders for any recitals, statements, representations or
   warranties made by the Company or any of its Subsidiaries or any of
   their respective officers contained in this Agreement, any other Loan
   Document, or in any certificate, report, oral or written statement or
   other document referred to or provided for in, or received by the Agent
   under or in connection with, this Agreement or any other Loan Document,
   (c) responsible in any manner to any of the Lenders for any failure of
   the Company or any of its Subsidiaries or any of their respective
   officers to perform its obligations hereunder or under any other Loan
   Document, (d) responsible in any manner to any of the Lenders for the
   effectiveness, genuineness, validity, enforceability, collectability
   or sufficiency of this Agreement or any other Loan Document,  (e)
   required to ascertain or inquire as to the performance or observance
   of any of the terms, conditions, provisions, covenants or agreements
   contained herein or in any other Loan Document or as to the use of the
   proceeds of the Loans or of the existence or possible existence of any
   Default or Event of Default, or (f) required to inspect the
   properties, books or records of the Company or any of its
   Subsidiaries.

            9.4  Reliance by Agent.  The Agent shall be entitled to rely,
   and shall be fully protected in relying, upon any note, writing,
   resolution, notice, consent, certificate, affidavit, letter, cablegram,
   telegram, telecopy, facsimile, telex or teletype message, statement,

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   order or other document or conversation believed by it to be genuine
   and correct and to have been signed, sent or made by the proper Person
   or Persons, and upon advice and statements of legal counsel (including,
   without limitation, counsel to the Company or any of its Subsidiaries),
   independent accountants and other experts selected by the Agent.  The
   Agent may deem and treat the payee of any Note as the owner thereof
   for all purposes unless the Agent shall have received an executed
   assignment and assumption agreement pursuant to Section 13.1(a) in
   respect thereof.  The Agent shall be fully justified in failing or
   refusing to take any action under this Agreement or any other Loan
   Document unless it shall first receive such advice or concurrence of
   the Required Lenders as it deems appropriate or it shall first be
   indemnified to its satisfaction by the Lenders against any and all
   liability and expense which may be incurred by it by reason of taking
   or continuing to take any such action.  The Agent shall in all cases
   be fully protected in acting, or in refraining from acting, under this
   Agreement and the other Loan Documents in accordance with a request of
   the Required Lenders, and such request and any action taken or failure
   to act pursuant thereto shall be binding upon all the Lenders.

            9.5  Notice of Default.  The Agent shall not be deemed to
   have knowledge or notice of the occurrence of any Default or Event of
   Default hereunder unless the Agent has received notice from a Lender or
   the Company referring to this Agreement, describing such Default or Event
   of Default and stating that such notice is a "notice of default."  In
   the event that the Agent receives such a notice, the Agent shall give
   prompt notice thereof to the Lenders.  The Agent shall take such action
   with respect to such Default or Event of Default as shall be reasonably
   directed by the Required Lenders; provided, that unless and until the
   Agent shall have received such directions, the Agent may (but shall not
   be obligated to) take such action, or refrain from taking such action,
   with respect to such Default or Event of Default as it shall deem
   advisable in the best interests of the Lenders.

            9.6  Non-Reliance on Agent and Other Lenders.  Each Lender
   expressly acknowledges that neither the Agent nor any of its respective
   officers, directors, employees, agents, attorneys-in-fact or
   affiliates has made any representations or warranties to it and that
   no act by the Agent hereinafter taken, including any review of the
   affairs of the Company or any of its Subsidiaries shall be deemed to
   constitute any representation or warranty by the Agent.  Each Lender
   represents to the Agent that it has, independently and without
   reliance upon the Agent or any other Lender, and based on such
   documents and information as it has deemed appropriate, made its own
   appraisal of and investigation into the business, assets, operations,
   property, financial and other condition, prospects and

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   creditworthiness of the Company or its Subsidiaries and made its own
   decision to make its Loans hereunder and enter into this Agreement.
   Each Lender also represents that it will, independently and without
   reliance upon the Agent or any other Lender, and based on such
   documents and information as it shall deem appropriate at the time,
   continue to make its own credit analysis, appraisals and decisions in
   taking or not taking action under this Agreement, and to make such
   investigation as it deems necessary to inform itself as to the
   business, assets, operations, property, financial and other condition,
   prospects and creditworthiness of the Company and its Subsidiaries.
   The Agent shall not have any duty or responsibility to provide any
   Lender with any credit or other information concerning the business,
   operations, assets, liabilities, property, prospects, financial and
   other condition or creditworthiness of the Company or any of its
   Subsidiaries which may come into the possession of the Agent or any of
   its officers, directors, employees, agents, attorneys-in-fact or
   affiliates.

            9.7  Indemnification.  The Lenders agree to indemnify the
   Agent in its capacity as such and its officers, directors, employees,
   representatives and agents ratably according to their respective
   "percentages" as used in determining the Required Lenders at such
   time, from and against any and all liabilities, obligations, losses,
   damages, penalties, actions, judgments, suits, costs, expenses or
   disbursements of any kind or nature whatsoever (including, without
   limitation, the fees and disbursements of counsel for the Agent or
   such Person in connection with any investigative, administrative or
   judicial proceeding commenced or threatened, whether or not the Agent
   or such Person shall be designated a party thereto) which may at any
   time (including, without limitation, at any time following the payment
   of the Obligations) be imposed on, incurred by or asserted against
   the Agent or such Person in any way as a result of, relating to or by
   reason of, or arising out of the execution, delivery or performance
   of this Agreement or any other Loan Document, or any documents
   contemplated by or referred to herein or the transactions contemplated
   hereby of any action taken or omitted to be taken by the Agent under
   or in connection with any of the foregoing, but only to the extent that
   any of the foregoing is not paid by the Company or any of its
   Subsidiaries; provided, that no Lender shall be liable to the Agent
   or such Person for the payment of any portion of such liabilities,
   obligations, losses, damages, penalties, actions, judgments, suits,
   costs, expenses or disbursements resulting solely from the gross
   negligence or willful misconduct of the Agent or such Person as
   finally determined by a court of competent jurisdiction.  If any
   indemnity furnished to the Agent for any purpose shall, in the
   opinion of the Agent, be insufficient or become impaired, the Agent
   may call for additional indemnity and cease, or not commence, to do

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   the acts indemnified against until such additional indemnity is
   furnished.  The agreements in this Section 9.7 shall survive the
   payment of all Obligations.

            9.8  Agent in Its Individual Capacity.  The Agent and its
   Affiliates may make loans to, accept deposits from and generally engage
   in any kind of business with the Company and its Subsidiaries as though
   the Agent were not the Agent hereunder.  With respect to the Loans made
   by it and all Obligations owing to it, the Agent shall have the same
   rights and powers under this Agreement as any Lender and may exercise
   the same as though it were not the Agent and the terms "Lender" and
   "Lenders" shall include the Agent in its individual capacity.

            9.9  Resignation of the Agent; Successor Agent.  The Agent
   may resign as the Agent upon 20 days' notice to the Lenders and the
   Company.  If the Agent shall resign as Agent under this Agreement and
   the other Loan Documents,  the Required Lenders shall appoint from among
   the Lenders during such 20-day period a successor Agent which is a bank
   or a trust company, whereupon such successor agent shall succeed to
   the rights, powers and duties of the Agent, and the term "Agent" shall
   mean such successor Agent effective upon its appointment, and the
   resigning Agent's rights, powers and duties as the Agent shall be
   terminated, without any other or further act or deed on the part
   of such former Agent or any of the parties to this Agreement.
   If the Required Lenders are not able to appoint a successor Agent during
   such 20-day period, then the Required Lenders shall carry out the duties
   of Agent under the provisions of this Agreement and the other Loan
   Documents until a successor Agent is appointed.  After the resignation
   of the Agent hereunder, the provisions of this Section 9 and of Sections
   13.2 and 13.3 shall inure to its benefit as to any actions taken or
   omitted to be taken by it while it was Agent under this Agreement.

   SECTION 10. GUARANTEE

            10.1 Unconditional Guarantee.  Each Guarantor hereby
   unconditionally, jointly and severally, guarantees (such guarantee to be
   referred to herein as the "Guarantee"), subject to Section 11, to each
   of the Lenders and to the Agent and their respective successors and
   assigns, that:  (a) the principal of and interest on the Loans will be
   promptly paid in full when due, subject to any applicable grace period,
   whether at maturity, by acceleration or otherwise and interest on the
   overdue principal, if any, and interest on any interest, to the extent
   lawful, of the Loans and all other obligations of the Company to the
   Lenders or the Agent hereunder or thereunder will be promptly paid in
   full or performed, all in accordance with the terms hereof and thereof;
   and (b) in case of any extension of time of payment or renewal of any

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   of the Loans or of any such other obligations, the same will be promptly
   paid in full when due or performed in accordance with the terms of the
   extension or renewal, subject to any applicable grace period, whether
   at stated maturity, by acceleration or otherwise, subject, however,
   in the case of clauses (a) and (b) above, to the limitations set forth
   in Section 10.5.  Each Guarantor hereby agrees that its obligations
   hereunder shall be unconditional, irrespective of the validity,
   regularity or enforceability of the Loans or this Agreement, the
   absence of any action to enforce the same, any waiver or consent by
   any of the Lenders with respect to any provisions hereof or thereof,
   the recovery of any judgment against the Company, any action to enforce
   the same or any other circumstance which might otherwise constitute a
   legal or equitable discharge or defense of a Guarantor.  Each Guarantor
   hereby waives diligence, presentment, demand of payment, filing of claims
   with a court in the event of insolvency or bankruptcy of the Company,
   any right to require a proceeding first against the Company, protest,
   notice and all demands whatsoever and covenants that this Guarantee
   will not be discharged except by complete performance of the
   obligations contained in the Loans, this Agreement and in this
   Guarantee.  If any Lender or the Agent is required by any court or
   otherwise to return to the Company, any Guarantor, or any custodian,
   trustee, liquidator or other similar official acting in relation to
   the Company or any Guarantor, any amount paid by the Company or any
   Guarantor to the Agent or such Lender, this Guarantee, to the extent
   theretofore discharged, shall be reinstated in full force and effect.
   Each Guarantor further agrees that, as between each Guarantor, on the
   one hand, and the Lenders and the Agent, on the other hand, (x) the
   maturity of the obligations guaranteed hereby may be accelerated as
   provided in Section 7 for the purposes of this Guarantee,
   notwithstanding any stay, injunction or other prohibition preventing
   such acceleration in respect of the obligations guaranteed hereby, and
   (y) in the event of any acceleration of such obligations as provided
   in Section 7, such obligations (whether or not due and payable) shall
   forthwith become due and payable by each Guarantor for the purpose of
   this Guarantee.

            10.2  Subordination of Guarantee.  The obligations of each
   Guarantor to the Lenders and to the Agent pursuant to the Guarantee of
   such Guarantor and the other sections of this Agreement are expressly
   subordinate and subject in right of payment to the prior payment in full
   of all Guarantor Senior Debt of such Guarantor, to the extent and in the
   manner provided in Section 11.

            10.3  Severability.  In case any provision of this Guarantee
   shall be invalid, illegal or unenforceable, the validity, legality, and
   enforceability of the remaining provisions shall not in any way be
   affected or impaired thereby.

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            10.4  Release of a Guarantor.  Upon (a) the release by the
   lenders under the Senior Secured Credit Agreement of all obligations
   of a Guarantor under the Senior Secured Credit Agreement and all Liens
   on the property and assets of such Guarantor relating to such
   Indebtedness, or (b) the sale or disposition (whether by merger,
   stock purchase, asset sale or otherwise) of a Guarantor (or all or
   substantially all its assets) to an entity which is not a Subsidiary
   of the Company and which sale or disposition is otherwise in compliance
   with the terms of this Agreement, such Guarantor shall be deemed released
   from all obligations under this Section 10 without any further action
   required on the part of the Agent or any Lender; provided, however,
   that any such termination shall occur only to the extent that all
   obligations of such Guarantor under the Senior Secured Credit Agreement,
   and under all of its pledges of assets or other security interests which
   secure such Indebtedness, shall also terminate upon such release, sale or
   transfer.
   The Agent shall deliver an appropriate instrument evidencing
   such release upon receipt of a request by the Company accompanied by
   an Officers' Certificate certifying as to the compliance with this
   Section 10.4.  Any Guarantor not so released remains liable for the
   Obligations as provided in this Section 10.

            10.5  Limitation of Guarantor's Liability.  Each Guarantor
   and, by its acceptance hereof each of the Lenders, hereby confirms that
   it is the intention of all such parties that this Guarantee not
   constitute a fraudulent transfer or conveyance for purposes of any
   Bankruptcy Law, the Uniform Fraudulent Conveyance Act, the Uniform
   Fraudulent Transfer Act or any similar Federal or state law.  To
   effectuate the foregoing intention, the Lenders and such Guarantor hereby
   irrevocably agree that the obligations of such Guarantor under the
   Guarantee shall be limited to the maximum amount as will, after giving
   effect to all other contingent and fixed liabilities of such Guarantor
   (including, but not limited to, the Guarantor Senior Debt of such
   Guarantor) and after giving effect to any collections from or payments
   made by or on behalf of any other Guarantor in respect of the
   obligations of such other Guarantor under its Guarantee or pursuant
   to Section 10.7, result in the obligations of such Guarantor under the
   Guarantee not constituting such fraudulent transfer or conveyance.

            10.6  Guarantors May Consolidate, etc., on Certain Terms.

            (a)  Nothing contained in this Agreement or in the Loans
   shall prevent any consolidation or merger of a Guarantor with or into
   the Company or another Guarantor or shall prevent any sale or
   conveyance of the Property of a Guarantor as an entirety or

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   substantially as an entirety, to the Company or another Guarantor.
   Upon any such consolidation, merger, sale or conveyance, the Guarantee
   given by such Guarantor shall no longer have any force or effect.

            (b)  Except as set forth in Section 6.3, nothing contained
   in this Agreement or in the Loans shall prevent any consolidation or
   merger of a Guarantor with or into a corporation or corporations other
   than the Company or another Guarantor (whether or not affiliated with
   the Guarantor); provided, however, that, subject to Sections 10.4 and
   10.6(a), (i) immediately after such transaction, and giving effect
   thereto, no Default or Event of Default shall have occurred as a
   result of such transaction and be continuing, and (ii) upon any such
   consolidation, merger, sale or conveyance, the Guarantee of such
   Guarantor set forth in this Section 10, and the due and punctual
   performance and observance of all of the covenants and conditions of
   this Agreement to be performed by such Guarantor, shall be expressly
   assumed (in the event that the Guarantor is not the surviving
   corporation in the merger), in writing satisfactory in form to the
   Agent, executed and delivered to the Agent, by the corporation formed
   by such consolidation, or into which the Guarantor shall have merged,
   or by the corporation that shall have acquired such Property.  In the
   case of any such consolidation, merger, sale or conveyance and upon
   the assumption by the successor corporation in writing executed and
   delivered to the Agent and satisfactory in form to the Agent of the
   due and punctual performance of all of the covenants and conditions of
   this Agreement to be performed by the Guarantor, such successor
   corporation shall succeed to and be substituted for the Guarantor with
   the same effect as if it had been named herein as a Guarantor.

            10.7 Contribution.  In order to provide for just and equitable
   contribution among the Guarantors, the Guarantors agree, inter se, that
   in the event any payment or distribution is made by any Guarantor
   (a "Funding Guarantor") under its Guarantee, such Funding Guarantor
   shall be entitled to a contribution from all other Guarantors in a
   pro rata amount based on the Adjusted Net Assets of each Guarantor
   (including the Funding Guarantor) for all payments, damages and expenses
   incurred by that Funding Guarantor in discharging the Company's obligations
   with respect to the Obligations.  "Adjusted Net Assets" of such Guarantor
   at any date shall mean the lesser of (x) the amount by which the fair
   value of the Property of such Guarantor exceeds the total amount of
   liabilities, including, without limitation, contingent liabilities
   (after giving effect to all other fixed and contingent liabilities
   Incurred on such date (other than liabilities of such Guarantor under
   Subordinated Indebtedness)), but excluding liabilities under the
   Guarantee, of such Guarantor at such date and (y) the amount by which
   the present fair salable value of the assets of such Guarantor at such
   date exceeds the amount that will be required to pay the probable
   liabilities of such Guarantor on its debts including, without

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   limitation, Guarantor Senior Debt (after giving effect to all other
   fixed and contingent liabilities Incurred on such date and after
   giving effect to any collection from any Subsidiary of such Guarantor
   in respect of the obligations of such Subsidiary under the Guarantee),
   excluding debt in respect of the Guarantee of such Guarantor, as they
   become absolute and matured.

            10.8  Waiver of Subrogation. Until such time as all
   Obligations on the Loans are paid in full, each Guarantor hereby
   irrevocably waives any claim or other rights which it may now or
   hereafter acquire against the Company that arise from the existence,
   payment, performance or enforcement of such Guarantor's obligations
   under its Guarantee and the other sections of this Agreement,
   including, without limitation, any right of subrogation, reimbursement,
   exoneration, indemnification, and any right to participate in any
   claim or remedy of any Lender against the Company, whether or not
   such claim, remedy or right arises in equity, or under contract,
   statute or common law, including, without limitation, the right to
   take or receive from the Company, directly or indirectly, in cash
   or other Property or by set-off or in any other manner, payment or
   security on account of such claim or other rights.  If any amount
   shall be paid to any Guarantor in violation of the preceding sentence
   and the Loans shall not have been paid in full, such amount shall be
   deemed to have been paid to such Guarantor for the benefit of, and
   held in trust for the benefit of, the Lenders, and shall, subject to
   the provisions of Section 8, Section 10.2 and Section 11, forthwith
   be paid to the Agent for the benefit of such Lenders to be credited
   and applied upon the Loans, whether matured or unmatured, in
   accordance with the terms of this Agreement.  Each Guarantor
   acknowledges that it will receive direct and indirect benefits from
   the financing arrangements contemplated by this Agreement and that
   the waiver set forth in this Section 10.8 is knowingly made in
   contemplation of such benefits.

            10.9  Evidence of Guarantee.  To evidence their guarantees
   to the Lenders set forth in this Section 10, each of the Guarantors hereby
   agrees to execute the notation of Guarantee in substantially the form
   included in Exhibit VI.  Each such notation of Guarantee shall be signed
   on behalf of each Guarantor by two Officers, or an Officer and an
   Assistant Secretary or one Officer shall sign and one Officer or an
   Assistant Secretary (each of whom shall, in each case, have been duly
   authorized by all requisite corporate actions) shall attest to such
   notation of Guarantee.

            10.10  Waiver of Stay, Extension or Usury Laws.  Each
   Guarantor covenants (to the extent that it may lawfully do so) that it
   will not at any time insist upon, plead, or in any manner whatsoever

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   claim or take the benefit or advantage of, any stay or extension law
   or any usury law or other law that would prohibit or forgive such
   Guarantor from performing its Guarantee as contemplated herein, wherever
   enacted, now or at any time hereafter in force, or which may affect the
   covenants or the performance of this Agreement; and (to the extent that
   it may lawfully do so) each Guarantor hereby expressly waives all
   benefit or advantage of any such law, and covenants that it will not
   hinder, delay or impede the execution of any power herein granted to
   the Agent, but will suffer and permit the execution of every such
   power as though no such law had been enacted.

   SECTION 11. SUBORDINATION OF GUARANTEE OBLIGATIONS

            11.1  Guarantee Obligations Subordinated to Guarantor Senior
   Debt.  The Lenders covenant and agree that payments of the
   obligations by a Guarantor in respect of its Guarantee (collectively,
   as to any Guarantor, its "Guarantee Obligations") shall be
   subordinated in accordance with the provisions of this Section 11 to
   the prior indefeasible payment in full, in cash or Cash Equivalent
   Investments, of all amounts payable in respect of Guarantor Senior
   Debt of such Guarantor, whether now outstanding or hereafter created,
   that the subordination is for the benefit of the holders of Guarantor
   Senior Debt of such Guarantor, and that each holder of Guarantor
   Senior Debt of such Guarantor whether now outstanding or hereafter
   Incurred shall be deemed to have acquired Guarantor Senior Debt of
   such Guarantor in reliance upon the covenants and provisions contained
   in this Agreement.

            11.2  Priority and Payment Over of Proceeds in Certain
   Events.

            (a)  Subordination of Guarantee Obligations on Dissolution,
   Liquidation or Reorganization of Such Guarantor.  Upon any payment or
   distribution of assets or securities of any Guarantor of any kind or
   character, whether in cash, Property or securities, upon any
   dissolution or winding up or total or partial liquidation or
   reorganization of such Guarantor, whether voluntary or involuntary or
   in bankruptcy, insolvency, receivership or other proceedings (other
   than a liquidation or dissolution of such Guarantor into the Company
   or another Guarantor), all Guarantor Senior Debt of such Guarantor
   shall first be indefeasibly paid in full in cash or Cash Equivalent
   Investments (or such payment shall first be duly provided for to the
   satisfaction of the holders of Guarantor Senior Debt), before the
   Lenders shall be entitled to receive any payment with respect to any
   Guarantee Obligations of such Guarantor (other than Guarantor Junior
   Securities), and upon any such dissolution or winding up or
   liquidation or reorganization, any payment or distribution of assets
   or securities (other than Guarantor Junior Securities) of such

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   Guarantor of any kind or character, whether  in cash, Property or
   securities, to which the Lenders would be entitled except for the
   provisions of this Section 11, shall be made by such Guarantor or by
   any receiver, trustee in bankruptcy, liquidating trustee, agent or
   other Person making such payment or distribution, directly to the
   holders of the Guarantor Senior Debt of such Guarantor or their
   representatives to the extent necessary to pay all of the Guarantor
   Senior Debt of such Guarantor to the holders of such Guarantor Senior
   Debt.

            (b)  Subordination of Guarantee Obligations on Default on
   Guarantor Senior Debt.  Upon the maturity of any Guarantor Senior Debt
   of a Guarantor by lapse of time, acceleration or otherwise, all
   Guarantor Senior Debt of such Guarantor then due and payable shall
   first be indefeasibly paid in full in cash or Cash Equivalent
   Investments (or such payment shall first be duly provided for to the
   satisfaction of the holders of Guarantor Senior Debt), before any
   payment is made by such Guarantor or any Person acting on behalf of
   such Guarantor with respect to the Guarantee Obligations of such
   Guarantor (other than Guarantor Junior Securities).  No direct or
   indirect payment by any Guarantor or any Person acting on behalf of
   such Guarantor of any Guarantee Obligations of such Guarantor whether
   pursuant to the terms of the Loans or upon acceleration or otherwise
   shall be made (other than Guarantor Junior Securities), if at the time
   of such payment, there exists a default (as defined in the document
   governing any Guarantor Senior Debt of such Guarantor) in the payment
   of all or any portion of any Guarantor Senior Debt of such Guarantor
   and such default shall not have been cured or waived in writing or the
   benefits of this sentence waived in writing by or on behalf of the
   holders of such Guarantor Senior Debt.  In addition, during the
   continuation of any other event of default with respect to any
   Guarantor Senior Debt of such Guarantor pursuant to which the maturity
   thereof may be accelerated, upon the receipt by the Agent of written
   notice from the Representative of the holders of such Guarantor Senior
   Debt, no such payment may be made by such Guarantor under its
   Guarantee (other than Guarantor Junior Securities) for a period (a
   "Guarantor Payment Blockage Period") commencing on the date of receipt
   of such notice and ending 179 days after receipt of such written
   notice by the Agent (unless such Guarantor Payment Blockage Period
   shall be terminated by written notice to the Agent from such
   Representative).  Notwithstanding anything herein to the contrary,
   (x) in no event will a Guarantor Payment Blockage Period or successive
   Guarantor Payment Blockage Periods with respect to the same payment on
   such Guarantee extend beyond 179 days from the date the payment on
   such Guarantee was due and (y) only one such Payment Blockage Period
   may be commenced within any 360 consecutive days.  For all purposes of
   this Section 11.2(b), no event of default which existed or was
   continuing on the date of the commencement of any Guarantor Payment

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   Blockage Period with respect to the Guarantor Senior Debt initiating
   such Guarantor Payment Blockage Period shall be, or be made, the basis
   for the commencement of a second Guarantor Payment Blockage Period by
   the holders or by the Representative of such Guarantor Senior Debt
   whether or not within a period of 360 consecutive days, unless such
   event of default shall have been cured or waived for a period of not
   less than 90 consecutive days.

            (c)  Rights and Obligations of the Lenders.  In the event
   that, notwithstanding the foregoing provisions prohibiting such
   payment or distribution, the Agent or any Lender shall have received
   any payment on account of any Guarantee Obligation (other than as
   permitted by Sections (a) and (b) of this Section 11.2) at a time when
   such payment is prohibited by this Section 11.2, then and in such
   event such payment or distribution shall be received and held in trust
   for the Representative of the holders of the Guarantor Senior Debt and
   shall be paid over or delivered to the Representative of the holders
   of the Guarantor Senior Debt remaining unpaid to the extent necessary
   to pay in full in cash or Cash Equivalent Investments all Guarantor
   Senior Debt in accordance with their terms after giving effect to any
   concurrent payment or distribution to the holders of such Guarantor
   Senior Debt.

            Nothing contained in this Section 11 will limit the right of
   the Lenders to take any action to accelerate the maturity of the Loans
   pursuant to Section 7 or to pursue any rights or remedies hereunder or
   otherwise; provided, however, that if any Guarantor Senior Debt is
   outstanding, no Guarantor shall make any payment on account of the
   Guarantee Obligations until five Business Days after the
   Representative of the holders of the Guarantor Senior Debt receives
   notice of such acceleration and, thereafter, such Guarantor may pay
   the Guarantee Obligations only if this Section 11 otherwise permits
   payment at that time.

            Upon any payment or distribution of assets or securities
   referred to in this Section 11, the Lenders (notwithstanding any other
   provision of this Agreement) shall be entitled to rely upon any order
   or decree of a court of competent jurisdiction in which such
   dissolution, winding up, liquidation or reorganization proceedings are
   pending, and upon a certificate of the receiver, trustee in
   bankruptcy, liquidating trustee, agent or other Person making any such
   payment or distribution, delivered to the Lenders for the purpose of
   ascertaining the Persons entitled to participate in such distribution,
   the holders of Guarantor Senior Debt, the amount thereof or payable
   thereon, the amount or amounts paid or distributed thereon and all
   other facts pertinent thereto or to this Section 11.

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            The Guarantors shall give written notice to each of the
   Lenders of any default or event of default under any Guarantor Senior
   Debt or under any agreement pursuant to which Guarantor Senior Debt
   may have been issued, and, in the event of any such event of default,
   shall provide to the Agent the names and addresses of the
   Representatives of holders of such Guarantor Senior Debt.

            With respect to the holders and owners of Guarantor Senior
   Debt, each Lender undertakes to perform only such obligations on the
   part of the Lenders as are specifically set forth in this Section 11,
   and no implied covenants or obligations with respect to the holders or
   owners of Guarantor Senior Debt shall be read into this Agreement
   against the Lenders.  The Lenders shall not be deemed to owe any
   fiduciary duty to the holders or owners of Guarantor Senior Debt or to
   the agent under the Senior Secured Credit Agreement or any
   Representative of the holders of the Guarantor Senior Debt.

            11.3  Payments May Be Paid Prior to Dissolution.  Nothing
   contained in this Section 11 or elsewhere in this Agreement shall
   prevent or delay (a) the Guarantors, except under the conditions
   described in Section 11.2, from making payments at any time for the
   purpose of paying Guarantee Obligations, or from depositing with the
   Agent any moneys for such payments, or (b) subject to Section 11.2,
   the application by the Agent of any moneys deposited with it for the
   purpose of paying Guarantee Obligations.

            11.4  Rights of Holders of Guarantor Senior Debt Not To Be
   Impaired.  No right of any present or future holder of any Guarantor
   Senior Debt to enforce subordination as provided in this Section 11
   shall at any time in any way be prejudiced or impaired by any act or
   failure to act by any such holder (other than an express waiver of
   subordination or an amendment of this Section 11.4), or by any
   noncompliance by any Guarantor with the terms and provisions and
   covenants herein, regardless of any knowledge thereof any such holder
   may have or otherwise be charged with.  Without in any way limiting
   the generality of the foregoing sentence, such holders of Guarantor
   Senior Debt may, at any time and from time to time without impairing
   or releasing the subordination provided in this Section 11 or the
   obligations of the Lenders hereunder to the holders of Guarantor
   Senior Debt, do any one or more of the following:  (a) change the
   manner, place, terms or time of payment of, or renew or alter,
   Guarantor Senior Debt or otherwise amend or supplement in any manner
   Guarantor Senior Debt or any instrument evidencing the same or any
   agreement under which any Guarantor Senior Debt is outstanding;
   (b) sell, exchange, release, or otherwise deal with any property
   pledged, mortgaged, or otherwise securing Guarantor Senior Debt or

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   fail to perfect or delay in the perfection of the security interest in
   such property; (c) release any Person liable in any manner for the
   collection of Guarantor Senior Debt; and (d) exercise or refrain from
   exercising any rights against the Guarantors or any other Person.
   Each Lender by purchasing or accepting a Note waives any and all
   notice of the creation, modification, renewal, extension or accrual of
   any Guarantor Senior Debt and notice of or proof of reliance by any
   holder or owner of Guarantor Senior Debt upon this Section 11 and the
   Guarantor Senior Debt shall conclusively be deemed to have been
   Incurred in reliance upon this Section 11, and all dealings between
   the Guarantors and the holders and owners of the Guarantor Senior Debt
   shall be deemed to have been consummated in reliance upon this
   Section 11.

            The provisions of this Section 11 are intended to be for the
   benefit of, and shall be enforceable directly by, the holders of the
   Guarantor Senior Debt.

            11.5  Subrogation.  Upon the indefeasible payment in full in
   accordance with the terms of Section 11.2 of all amounts payable under or
   in respect of the Guarantor Senior Debt, the Lenders shall be subrogated
   to the rights of the holders of such Guarantor Senior Debt to receive
   payments or distributions of assets of the Guarantors made on such
   Guarantor Senior Debt until the Guarantee Obligations shall be paid
   in full in cash or Cash Equivalent Investments to the extent set forth
   herein; and for purposes of such subrogation no payments or distributions
   to holders of such Guarantor Senior Debt of any cash, Property or
   securities to which the Lenders would be entitled except for the
   provisions of this Section 11, and no payment over pursuant to the
   provisions of this Section 11 to holders of such Guarantor Senior Debt
   by the Lenders, shall, as between such Guarantor, its creditors other
   than holders of such Guarantor Senior Debt and the Lenders, be deemed
   to be a payment by such Guarantor to or on account of such Guarantor
   Senior Debt, it being understood that the provisions of this
   Section 11 are solely for the purpose of defining the relative rights
   of the holders of such Guarantor Senior Debt, on the one hand, and the
   Lenders, on the other hand.  A release of any claim by any holder of
   Guarantor Senior Debt shall not limit the Lenders' rights of
   subrogation under this Section 11.5.

            If any payment or distribution to which the Lenders would
   otherwise have been entitled but for the provisions of this Section 11
   shall have been applied, pursuant to the provisions of this
   Section 11, to the payment of all amounts payable under the Guarantor
   Senior Debt, then and in such case, the Lenders shall be entitled to
   receive from the holders of such Guarantor Senior Debt at the time
   outstanding the amount of any payments or distributions received by
   such holders of Guarantor Senior Debt in excess of the amount
   sufficient to pay all Guarantor Senior Debt payable under or in

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   respect of the Guarantor Senior Debt in full in cash or Cash
   Equivalent Investments in accordance with the terms of Section 11.2.

            11.6  Obligations of the Guarantors Unconditional.  Nothing
   contained in this Section 11 or elsewhere in this Agreement or in the
   Guarantees is intended to or shall impair as between the Guarantors
   and the Lenders the obligations of the Guarantors, which are absolute and
   unconditional, to pay to the Lenders the Guarantee Obligations as and
   when the same shall become due and payable in accordance with their
   terms, or is intended to or shall affect the relative rights of the
   Lenders and creditors of the Guarantors other than the holders of the
   Guarantor Senior Debt, nor shall anything herein or therein prevent
   the Lenders from exercising all remedies otherwise permitted by
   applicable law upon default under this Agreement, subject to the
   rights, if  any, under this Section 11 of the holders of such
   Guarantor Senior Debt in respect of cash, Property or securities of
   the Guarantors received upon the exercise of any such remedy.

            The failure to make a payment on account of Guarantee
   Obligations by reason of any provision of this Section 11 shall not
   prevent the occurrence of an Event of Default under Section 7.

            11.7  Lenders Authorize Agent To Effectuate Subordination.  Each
   Lender hereby authorizes and expressly directs the Agent on its behalf
   to take such action as may be necessary or appropriate to effectuate
   the subordination provided in this Section 11 and appoints the Agent
   its attorney in fact for such purpose, including, without limitation,
   in the event of any dissolution, winding up, liquidation or
   reorganization of any Guarantor (whether in bankruptcy, insolvency,
   receivership, reorganization or similar proceedings or upon an
   assignment for the benefit of creditors or any other similar remedy or
   otherwise) tending towards liquidation of the business and assets of
   any Guarantor, the immediate filing of a claim for the unpaid balance
   of the Guarantee Obligations in the form required in said proceedings
   and causing said claim to be approved or the actions required to
   negotiate and/or effectuate a restructuring of the Guarantee
   Obligations.  If the Agent does not file a proper claim or proof of
   debt in the form required in such proceeding prior to 30 days before
   the expiration of the time to file such claim or claims, then the
   holders of the Guarantor Senior Debt are hereby authorized to have the
   right to file and are hereby authorized to file an appropriate claim
   for and on behalf of the Lenders.  In the event of any such
   proceeding, until the Guarantor Senior Debt is paid in full in cash or
   Cash Equivalent Investments, without the consent of the holders of a
   majority in principal amount outstanding of Guarantor Senior Debt, no

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   Lender shall waive, settle or compromise any such claim or claims
   relating to the Obligations that such Lender now or hereafter may have
   against the Guarantors.

   SECTION 12. WARRANTS

            Warrants to purchase up to an aggregate of 10% of the "fully
   diluted" shares of the Common Stock of the Company will be executed,
   issued and deposited into escrow pursuant to the Escrow Agreement.
   The Warrants delivered into escrow shall be represented by a "Formula
   Warrant Certificate" in the form attached to the Warrant Agreement.
   The Formula Warrant Certificate will represent all Warrants that may
   be released pursuant to this Section 12, after giving effect to any
   previous release of Warrants.  The parties hereto acknowledge and
   agree that the aggregate number of shares of Common Stock represented
   by Warrants released on any Warrant Release Date, plus the aggregate
   number of shares of Common Stock represented by all previously
   released Warrants, shall in no event exceed 10% of the Company's
   "fully diluted" Common Stock as of the latest Warrant Release Date.

            (a)  Subject to the limitation set forth in the last
   sentence of the preceding paragraph, Warrants representing the right
   to purchase up to 10% of the Company's "fully-diluted" Common Stock
   shall be released by the Escrow Agent on the applicable Warrant
   Release Date to BOCM, pursuant to a Warrant Release Request delivered
   by BOCM to the Escrow Agent and the Company at any time on or after
   180 days following the Closing Date, for purposes of selling the
   Permanent Securities.  BOCM may not request the release of Warrants
   from the escrow pursuant to this Section 12(a) unless BOCM determines
   in good faith that such release is necessary in connection with such
   sale of Permanent Securities.  No other party, including the Lenders,
   shall have any right to request the release of Warrants from escrow.
   Warrants shall be released from escrow by the Escrow Agent pursuant to
   this Section 12(a) in such names and denominations as BOCM may specify
   pursuant to such Warrant Release Request.

            (b)  The "Applicable Number of Warrants" shall be released
   by the Escrow Agent on the applicable Warrant Release Date to the
   Lenders (or their designated Affiliates) pursuant to a Warrant Release
   Request delivered by the Agent to the Escrow Agent and the Company.
   Subject to the limitation set forth in the last sentence of the first
   paragraph of this Section 12, the "Applicable Number of Warrants" for
   any Warrant Release Date is equal to the product of (i) the percentage
   set forth under column B below applicable to such Warrant Release Date
   (based on the number of days elapsed from the Closing Date to such

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   Warrant Release Date as specified in the corresponding column A
   below), multiplied by (ii) 10% of the "fully diluted" shares of Common
   Stock of the Company outstanding on such Warrant Release Date (as
   certified in writing by the Company's Chief Financial Officer or
   Treasurer).

              A                                          B

       0 to 179 days                                  0.0%
       180 to 269 days                               25.0%
       270 to 359 days                               50.0%
       360 to 449 days                               75.0%
       450 days and thereafter                      100.0%

   The aggregate amount of Warrants, if any, available to be issued to
   the Lenders pursuant to this clause (b) shall be allocated among the
   Lenders in accordance with the percentage that the outstanding
   principal amount of Notes held by each Lender bears to the total
   outstanding principal amount of all Notes held by all of the Lenders.
   The Lenders will not be considered to be the beneficial owners of any
   Warrants in escrow for any purpose until they are entitled to be
   issued such Warrants pursuant to this clause (b), upon which event
   they shall be reflected as the registered owners of Warrants on the
   register maintained by the Company for such purpose pursuant to
   Section 3 of the Warrant Agreement.

            (c)  Following the occurrence of the issuance of the
   Permanent Securities (if such issuance occurs prior to the 450th day
   following the Closing Date), any remaining Warrants to which the
   Lenders are not entitled as set forth in clause (b) above shall be
   returned to the Company for cancellation.

            (d)  Notwithstanding anything contained herein to the
   contrary, the terms of this Section 12 shall survive the payment
   and/or refinancing of the Bridge Notes and/or the termination of this
   Agreement and shall remain operative and in full force and effect
   until the conditions to return or release all of the Warrants as set
   forth above have been satisfied.

   SECTION 13. MISCELLANEOUS

            13.1  Participations in and Assignments of Loans and Notes.

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            (a)  Each Lender shall have the right at any time to sell,
   assign, transfer or negotiate all or any portion of its Notes or its
   Loan Commitment in an aggregate amount of not less than $5,000,000 to
   any Eligible Assignee, other than to an Eligible Assignee which has,
   or has a Subsidiary which has, a principal line of business similar to
   any principal line of business of the Company or any of its
   Subsidiaries.  In the case of any sale, transfer or negotiation of all
   or part of the Notes or any Loan Commitment authorized under this
   Section 13.1(a), the assignee, transferee or recipient shall become a
   party to this Agreement as a Lender by execution of an assignment and
   assumption agreement; provided that (i) at such time Section 2.1(a) or
   2.2(a), as the case may be, shall be deemed modified to reflect the
   Loan Commitment of such new Lender and of the existing Lenders,
   (ii) upon surrender of the Notes, new Notes will be issued, at the
   Company's expense, to such new Lender and to the assigning Lender,
   such new Notes to be in conformity with the requirements of Section
   2.1(d) or 2.2(c) as the case may be (with appropriate modifications)
   to the extent needed to reflect the revised Loan Commitment, and
   (iii) the Agent shall receive at the time of each such assignment,
   from the assigning or assignee Lender, the payment of a non-refundable
   assignment fee of $3,500; and provided, further, that such transfer or
   assignment will not be effective until recorded by the Agent on the
   Register pursuant to Section 13.20.  To the extent of any assignment
   pursuant to this Section 13.1(a), the assigning Lender shall be
   relieved of its obligations hereunder with respect to its assigned
   Loan Commitment, and the assignee, transferee or recipient shall have,
   to the extent of such sale, assignment, transfer or negotiation, the
   same rights, benefits and obligations as it would if it were a Lender
   with respect to such Notes or Loan Commitment, including, without
   limitation, the right to approve or disapprove actions which, in
   accordance with the terms hereof, require the approval of a Lender.
   At the time of each assignment pursuant to this Section 13.1(a) to an
   Eligible Assignee which is not already a Lender hereunder and which is
   not a United States Person (as such term is defined in Section
   7701(a)(30) of the Internal Revenue Code) for Federal income tax
   purposes, the respective Eligible Assignee shall provide to the
   Company and the Agent the appropriate Internal Revenue Service Forms
   described in Section 2.10(b).

            (b)  Each Lender may grant participations in all or any
   part of its Notes or its Loan Commitment in an aggregate amount of not
   less than $1,000,000 to any Eligible Assignee, other than to an
   Eligible Assignee which has, or has a Subsidiary which has, a
   principal line of business similar to any principal line of business
   of the Company or any of its Subsidiaries; provided, however, that (i)
   such Lender's obligations under this Agreement shall remain unchanged,
   (ii) such Lender shall remain solely responsible to the other parties
   hereto for the performance of such obligations and (iii) the Company,
   the Agent and the other Lenders shall continue to deal solely and

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   directly with such Lender in connection with such Lender's rights and
   obligations under the Agreement and such Lender shall retain the sole
   right to enforce the obligations of the Company relating to the Loans
   and to approve any amendment, modification or waiver of any provision
   of this Agreement (other than amendments, modifications or waivers
   with respect to any fees payable hereunder or the amount of principal
   of or the rate at which interest is payable on the Loans, or the dates
   fixed for payments of fees or principal of or interest on the Loans or
   termination of the Loan Commitment).

            (c)  The Company shall, at its own cost and expense,
   provide such certificates, acknowledgments and further assurances in
   respect of this Agreement and the Loans as any Lender may reasonably
   require in connection with any participation, transfer or assignment
   pursuant to this Section 13.1.

            (d)  Nothing in this Agreement shall prevent or prohibit
   any Lender from pledging its Loan and Notes hereunder to a Federal
   Reserve Bank in support of borrowings made by such Lender from such
   Federal Reserve Bank.

            13.2 Expenses.  Whether or not the transactions contemplated
   hereby shall be consummated, the Company agrees to pay promptly upon
   demand (a) all the actual and reasonable costs and expenses of
   preparation of the Loan Documents and all the costs of furnishing all
   opinions by counsel for the Company and the Guarantors (including
   without limitation any opinions requested by the Lenders as to any
   legal matters arising hereunder), and of the Company's and the
   Guarantors' performance of and compliance with all agreements and
   conditions contained herein on its part to be performed or complied
   with; (b) the reasonable fees, expenses and disbursements of counsel
   to the Lenders (including allocated costs of internal counsel) in
   connection with the negotiation, preparation, execution and
   administration of the Loan Documents and the Loans hereunder, and
   any amendments, modifications and waivers hereto or thereto and
   consents to departures from the terms hereof and thereof; and
   (c) after the occurrence of an Event of Default, all costs and
   expenses (including reasonable attorneys' fees, including allocated
   costs of internal counsel, and costs of settlement) incurred by the
   Lenders or the Agent in enforcing any Obligations of or in collecting
   any payments due from the Company or any Guarantor hereunder or under
   the Notes by reason of such Event of Default or in connection with any
   refinancing or restructuring of the credit arrangements provided under
   this Agreement in the nature of a "work-out" or of any insolvency or
   bankruptcy proceedings.

            13.3 Indemnity.  In addition to the payment of expenses
   pursuant to Section 13.2, whether or not the transactions contemplated

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   hereby shall be consummated, the Company agrees to indemnify, pay and
   hold each of the Lenders, the Agent and any holder of any of the Notes,
   and each of their respective officers, directors, employees, agents,
   representatives and affiliates (collectively called the "Indemnitees"),
   harmless from and against any and all other liabilities, obligations,
   losses, damages, penalties, actions, judgments, suits, claims, costs,
   expenses and disbursements of any kind or nature whatsoever (including,
   without limitation, the reasonable fees and disbursements of counsel
   for such Indemnitees in connection with any investigative,
   administrative or judicial proceeding commenced or threatened, whether
   or not such Indemnitee shall be designated as a party thereto), which
   may be suffered by, imposed on, incurred by, or asserted against that
   Indemnitee, in any manner resulting from, connected with, in respect
   of, relating to or arising out of this Agreement,  the other Loan
   Documents and the Related Documents, the Commitment Letter, the Lenders'
   agreements to make the Loans or the use or intended use of any of the
   proceeds of the Loans hereunder, the issuance of the Exchange Notes or
   the Permanent Securities or the PSD Acquisition (the "indemnified
   liabilities"); provided, however, that the Company shall have no
   obligation to an Indemnitee hereunder with respect to indemnified
   liabilities (a) to the extent such liabilities are finally judicially
   determined to have resulted solely from (i) the gross negligence or
   willful misconduct of such Indemnitee or an affiliate of such
   Indemnitee or (ii) the failure of such Indemnitee to perform its
   obligations under any Loan Document or Related Document or (iii) such
   Indemnitee's violation of law or (b) in connection with the
   obligations of any Indemnitee under any Loan Document or Related
   Document or for any transfer fees.  To the extent that the undertaking
   to indemnify, pay and hold harmless set forth in the preceding
   sentence may be unenforceable because it is violative of any law or
   public policy, the Company shall contribute the maximum portion which
   it is permitted to pay and satisfy under applicable law to the payment
   and satisfaction of all indemnified liabilities incurred by the
   Indemnitees or any of them.

            13.4 Setoff.  Subject to Section 8, in addition to any rights
   now or hereafter granted under applicable law and not by way of
   limitation of any such rights, upon the occurrence and during the
   continuance of any Event of Default or, after the Maturity Date, upon
   all of the unpaid principal amount of and accrued interest on the Loans
   becoming due and payable, each Lender, the Agent and each subsequent
   holder of any Note is hereby authorized by the Company and each
   Guarantor at any time or from time to time, without notice to the
   Company or such Guarantor, or to any other Person, any such notice
   being hereby expressly waived, to set off and to appropriate and to
   apply any and all deposits (general or special, including, but not
   limited to, Indebtedness evidenced by certificates of deposit,
   whether matured or unmatured but not including trust accounts or any

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   <PAGE>

   other accounts held for the benefit of another Person) and any other
   Indebtedness at any time held or owing by such Person or any such
   subsequent holder to or for the credit or the account of the Company
   or such Guarantor against and on account of the obligations
   and liabilities of the Company or such Guarantor to such Person or
   such subsequent holder under this Agreement and the Notes, including,
   but not limited to, all claims of any nature or description arising
   out of or connected with this Agreement or the Notes, irrespective of
   whether or not (a) such Person or such subsequent holder shall have
   made any demand hereunder or (b) such Person or such subsequent holder
   shall have declared the principal of or the interest on its portion of
   the Loans and its Notes and other amounts due hereunder to be due and
   payable as permitted by Section 7 and although said obligations and
   liabilities, or any of them, may be contingent or unmatured.

            13.5  Amendments and Waivers.  No amendment, modification,
   termination or waiver of any term or provision of this Agreement, of the
   Notes or, prior to the execution and delivery thereof, of the form of the
   Senior Subordinated Indenture or consent to any departure by the Company
   or any Guarantor therefrom, shall in any event be effective without the
   prior written concurrence of the Company or such Guarantor, as the case
   may be, and the Required Lenders, and, upon the request of any Lender,
   the receipt of a written opinion of counsel of the Company addressed to
   the Lenders to the effect that such amendment, modification, termination,
   waiver or consent does not violate or conflict with any of the terms
   and provisions of the Senior Secured Credit Agreement or any other
   indenture, lease or other agreement of the Company; provided, however,
   that, notwithstanding the third sentence of Section 13.14, without the
   prior written consent of each Lender affected, an amendment,
   modification, termination or waiver of this Agreement, any Notes, any
   Guarantee, or consent to departure from a term or provision hereof or
   thereof may not:  (a) reduce the principal amount of Notes whose
   holders must consent to any such amendment, modification, termination,
   waiver or consent; (b) reduce the rate of or extend the time for
   payment of principal or interest on any Note; (c) reduce the principal
   amount of any Note; (d) make any Note payable in money other than that
   stated in the Note; (e) make any change in Section 13.5 or make any
   change in or waive performance by the Company of its obligations under
   Section 2.5(d) or in the definition of Change of Control; (f) reduce
   the rate or extend the time of payment of fees or other compensation
   payable to the Lenders hereunder; or (g) modify the provisions of
   Section 8 or Section 11 or any of the defined terms related thereto in
   any manner adverse to the Lenders; and provided, further, that without
   the consent of the Agent, no such amendment, modification, termination
   or waiver may amend, modify, terminate or waive any provision of
   Section 9 as the same applies to the Agent or any other provision of
   this Agreement as it relates to the rights or obligations of the

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   Agent.  Any waiver or consent shall be effective only in the specific
   instance and for the specific purpose for which it was given.  No
   notice to or demand on the Company or any Guarantor in any case shall
   entitle the Company or such Guarantor to any further notice or demand
   in similar or other circumstances.  Any amendment, modification,
   termination, waiver or consent effected in accordance with this
   Section 13.5 shall be binding upon each holder of the Notes at the
   time outstanding, each further holder of the Notes, and, if signed by
   the Company or a Guarantor, on the Company and such Guarantor.

            13.6  Independence of Covenants.  All covenants hereunder
   shall be given independent effect so that if a particular action or
   condition is not permitted by any of such covenants, the fact that it
   would be permitted by an exception to, or be otherwise within the
   limitation of, another covenant shall not avoid the occurrence of a
   Default or Event of Default if such action is taken or condition exists.
   For the purpose of determining compliance with any covenant contained
   herein, if an item meets the criteria of more than one type of exception
   described in such covenants or the definitions used therein, the Company
   or the Subsidiary in question shall have the right to determine in its
   sole discretion the category to which such item applies and shall not be
   required to include the amount and type of such item in more than one
   of such categories and may elect to apportion such item between or
   among two or more of such categories otherwise applicable.

            13.7  Entirety.  The Loan Documents, the Related Documents
 and the Fee Letter embody the entire agreement of the parties and
 supersede all prior agreements and understandings, if any, relating
 to the subject matter hereof and thereof.

            13.8  Notices.  Unless otherwise provided herein, any notice
   or other communications herein required or permitted to be given shall
   be in writing and may be personally served, telecopied, telexed or sent
   by mail and shall be deemed to have been given when delivered in person,
   upon receipt of telecopy or telex against receipt of answer back or four
   Business Days after depositing it in the mail, registered or certified,
   with postage prepaid and properly addressed; provided, however, that
   notices shall not be effective until received.  For the purposes hereof,
   the addresses of the parties hereto (until notice of a change thereof is
   delivered as provided in this Section 13.8) shall be set forth under
   each party's name on the signature pages hereto.

            13.9  Survival of Warranties and Certain Agreements.

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            (a)  All agreements, representations and warranties made
   herein shall survive the execution and delivery of this Agreement, the
   making of the Loans hereunder and the execution and delivery of the
   Notes and, notwithstanding the making of the Loans, the execution and
   delivery of the Notes or any investigation made by or on behalf of any
   party, shall continue in full force and effect.  The closing of the
   transactions herein contemplated shall not prejudice any right of one
   party against any other party in respect of anything done or omitted
   hereunder or in respect of any right to damages or other remedies.

            (b)  Notwithstanding anything in this Agreement or implied
   by law to the contrary, the agreements of the Company set forth in
   Sections 13.2, 13.3, 13.13, 13.14, 13.16 and 13.19 shall survive the
   payment of the Loans and the Notes and the termination of this
   Agreement.

            13.10  Failure or Indulgence Not Waiver; Remedies Cumulative.
   No failure or delay on the part of the Agent or any Lender or any
   holder of any Note in the exercise of any power, right or privilege
   hereunder, under a Guarantee or under the Notes shall impair such power,
   right or privilege or be construed to be a waiver of any default or
   acquiescence therein, nor shall any single or partial exercise of any
   such power, right or privilege preclude other or further exercise
   thereof or of any other right, power or privilege. All rights and
   remedies existing under this Agreement, under a Guarantee or the Notes
   are cumulative to and not exclusive of any rights or remedies otherwise
   available.

            13.11  Severability.  In case any provision in or obligation
   under this Agreement, under a Guarantee or the Notes shall be invalid,
   illegal or unenforceable in any jurisdiction, the validity, legality
   and enforceability of the remaining provisions or obligations, or of
   such provision or obligation in any other jurisdiction, shall not in
   any way be affected or impaired thereby.

            13.12  Headings.  Section and Section headings in this
   Agreement are included herein for convenience of reference only and
   shall not constitute a part of this Agreement for any other purpose or
   given any substantive effect.

            13.13  Applicable Law.  THIS AGREEMENT, INCLUDING EACH
   GUARANTEE, AND THE NOTES SHALL BE GOVERNED BY, AND SHALL BE CONSTRUED
   AND ENFORCED IN ACCORDANCE WITH, THE INTERNAL LAWS OF THE STATE OF
   ILLINOIS AS APPLIED TO AGREEMENTS MADE AND PERFORMED WITHIN SUCH STATE

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   WITHOUT GIVING EFFECT TO THE PRINCIPLES OF CONFLICTS OF LAW THEREOF.

            13.14  Successors and Assigns; Subsequent Holders of Notes.
   This Agreement shall be binding upon the parties hereto and their
   respective successors and assigns and shall inure to the benefit of
   the parties hereto and the permitted successors and assigns of the
   Lenders.  The terms and provisions of this Agreement and each
   Guarantee shall inure to the benefit of any assignee or transferee of
   the Notes pursuant to Section 13.1(a), and in the event of such
   transfer or assignment, the rights and privileges herein conferred
   upon the Lenders shall automatically extend to and be vested in such
   transferee or assignee, all subject to the terms and conditions
   hereof.  Except as provided in Section 13.5, in determining whether
   the holders of a sufficient aggregate principal amount of the Loans
   shall have consented to any action under this Agreement, any amount of
   the Loans owned or held by the Company, any Guarantor or any of its
   their respective Affiliates shall be disregarded.  The Company's and
   the Guarantors' rights or any interest therein hereunder may not be
   assigned without the prior express written consent of each of the
   Lenders.

            13.15  Counterparts; Effectiveness.  This Agreement and any
   amendments, waivers, consents or supplements may be executed in any
   number of counterparts and by different parties hereto in separate
   counterparts, each of which when so executed and delivered shall be
   deemed an original, but all such counterparts together shall constitute
   but one and the same instrument.  This Agreement shall become effective
   upon the execution of a counterpart hereof by each of the parties hereto,
   and delivery thereof to the Agent or, in the case of the Lenders, written
   telex or facsimile notice or telephonic notification (confirmed in
   writing) of such  execution and delivery.  The Agent will give the
   Company and each Lender prompt notice of the effectiveness of this
   Agreement.

            13.16  Consent to Jurisdiction; Venue; Waiver of Jury
   Trial.

            (a) Any legal action or proceeding with respect to this
   Agreement, any Note or any Guarantee may be brought in any Illinois
   state court or any United States court sitting in Chicago, Illinois,
   and, by execution and delivery of this Agreement, each of the parties
   to this Agreement hereby irrevocably accepts for itself and in respect
   of its respective property, generally and unconditionally, the
   jurisdiction of the aforesaid courts.  Each of the parties to this
   Agreement hereby further irrevocably waives any claim that any such
   courts lack jurisdiction over itself, and agrees not to plead or
   claim, in any legal action or proceeding with respect to this
   Agreement or the Notes brought in any of the aforesaid courts, that

                                      103
   <PAGE>

   any such court lacks jurisdiction over such party.  Each of the
   parties to this Agreement irrevocably consents to the service of
   process in any such action or proceeding by the mailing of copies
   thereof by registered or certified mail, postage prepaid, to such
   party, at its respective address for notices pursuant to Section 13.8,
   such service to become effective 30 days after such mailing.  To the
   extent permitted by law, each of the parties to this Agreement hereby
   irrevocably waives any objection to such service of process and
   further irrevocably waives and agrees not to plead or claim in any
   action or proceeding commenced hereunder or under any Note that
   service of process was in any way invalid or ineffective.  Nothing
   herein shall affect the right of any party to this Agreement to serve
   process in any other manner permitted by law or to commence legal
   proceedings or otherwise proceed against any party in any other
   jurisdiction.

            (b)  Each of the parties to this Agreement hereby
   irrevocably waives any objection which it may now or hereafter have to
   the laying of venue of any of the aforesaid actions or proceedings
   arising out of or in connection with this Agreement or the Notes
   brought in the courts referred to in clause (a) above and hereby
   further irrevocably waives and agrees not to plead or claim in any
   such court that any such action or proceeding brought in any such
   court has been brought in an inconvenient forum.

            (c)  EACH OF THE PARTIES TO THIS AGREEMENT HEREBY
   IRREVOCABLY WAIVES ALL RIGHT TO A TRIAL BY JURY IN ANY ACTION,
   PROCEEDING OR COUNTERCLAIM ARISING OUT OF OR RELATING TO THIS
   AGREEMENT OR THE NOTES OR THE TRANSACTIONS CONTEMPLATED HEREBY OR
   THEREBY.

            13.17  Payments Pro Rata.

            (a)  The Agent agrees that promptly after its receipt of
   each payment of any interest or premium on or principal of the Notes
   from or on behalf of the Company or any Guarantor, it shall, except as
   otherwise provided in this Agreement, distribute such payment to the
   Lenders (other than any Lender that has consented in writing to waive
   its pro rata share of such payment) pro rata based upon their
   respective pro rata shares, if any, of such payment.

            (b)  Each of the Lenders agrees that, if it should receive
   any amount hereunder (whether by voluntary payment, by realization
   upon security, by the exercise of the right of setoff or banker's
   lien, by counterclaim or cross action, by the enforcement of any right
   under the Loan Documents, or otherwise) which is applicable to the
   payment of the principal of, or interest on, the Loans of a sum which

                                      104
   <PAGE>

   with respect to the related sum or sums received by other Lenders is
   in a greater proportion than the total of such Obligations then owed
   and due to such Lender bears to the total of such Obligations then
   owed and due to all of the Lenders immediately prior to such receipt,
   then such Lender receiving such excess payment shall purchase for cash
   without recourse or warranty from the other Lenders an interest in the
   Obligations of the Company to such Lenders in such amount as shall
   result in a proportional participation by all of the Lenders in such
   amount; provided that, if all or any portion of such excess amount is
   thereafter recovered from such Lender, such purchase shall be
   rescinded and the purchase price restored to the extent of such
   recovery, but without interest.

            13.18  Waiver of Stay, Extension or Usury Laws.  The Company
   covenants (to the extent that it may lawfully do so) that it will not at
   any time insist upon, plead, or in any manner whatsoever claim or take
   the benefit or advantage of, any stay or extension law or any usury law
   or other law that would prohibit or forgive the Company from paying all
   or any portion of the principal of or interest on the Loans as
   contemplated herein, wherever enacted, now or at any time hereafter
   in force, or which may affect the covenants or the performance of
   this Agreement; and (to the extent that it may lawfully do so) the
   Company hereby expressly waives all benefit or advantage of any such
   law, and covenants that it will not hinder, delay or impede the
   execution of any power herein granted to the Agent, but will suffer and
   permit the execution of every such power as though no such law had been
   enacted.

            13.19  Confidentiality.  Each Lender shall hold all non-public
   information obtained pursuant to the requirements of or in connection with
   this Agreement which has been identified as confidential by the Company in
   accordance with such Lender's customary procedures for handling
   confidential information of this nature and in accordance with safe and
   sound banking practices, it being understood and agreed by the Company
   that (a) in any event a Lender may make disclosures reasonably required
   by any actual or prospective assignee, transferee or participant in
   connection with the contemplated assignment or transfer by such Lender
   of any Loans or any participation therein or as required or requested
   by any governmental agency or representative thereof or pursuant to
   legal process; provided that unless specifically prohibited by applicable
   law or court order, each Lender shall notify the Company of any request by
   any governmental agency or representative thereof (other than any such
   request in connection with any examination of the financial condition
   of such Lender by such governmental agency) for disclosure of any such
   non-public information prior to disclosure of such information and
   (b) a Lender may share with any of its Affiliates (that are not
   competitors of the Company or any Subsidiary in any of their
   respective lines of business), and such Affiliates may share with any

                                      105
   <PAGE>

   Lender (that is not a competitor of the Company or any Subsidiary in
   any of their respective lines of business), any information related to
   the Company or the Company's or their respective Affiliates (including
   information relating to creditworthiness), the PSD Acquisition or the
   financing therefor; and provided, further, that in no event shall any
   Lender be obligated or required to return any materials furnished by
   the Company or any of its Subsidiaries.

            13.20  Register.  The Company hereby designates the Agent
   to serve as the Company's agent, solely for purposes of this Section
   13.20, to maintain a register (the "Register") on which it will record the
   Loans made by each of the Lenders and each repayment in respect of the
   principal amount of the Loans of each Lender.  Failure to make any such
   recordation, or any error in such recordation shall not affect the
   Company's obligations in respect of such Loans.  With respect to any
   Lender, the transfer of the Loan Commitments of such Lender and the
   rights to the principal of, and interest on, any Loan made pursuant to
   such Loan Commitments shall not be effective until such transfer is
   recorded on the Register maintained by the Agent with respect to
   ownership of such Loan Commitments and Loans and prior to such
   recordation all amounts owing to the transferor with respect to such
   Loan Commitments and Loans shall remain owing to the transferor.
   The registration of assignment  or transfer of all or part of any Loan
   Commitments and Loans shall be recorded by the Agent on the Register
   only upon the receipt by the Agent of a properly executed and delivered
   assignment and assumption agreement pursuant to Section 13.1(a).
   Coincident with the delivery of such an Assignment and Assumption
   Agreement to the Agent for acceptance and registration of assignment
   or transfer of all or part of a Loan, or as soon thereafter as
   practicable, the assigning or transferor Lender shall surrender the
   Note evidencing such Loan, and thereupon one or more new Notes of
   the same type and in the same aggregate principal amount shall be
   issued to the assigning or transferor Lender and/or the new Lender.

                                      106
   <PAGE>

            WITNESS the due execution hereof by the respective duly
   authorized officers of the undersigned as of the date first written
   above.

                                     COMPANY:

                                     BIO-RAD LABORATORIES, INC.


                                     By:  /s/ Ronald W. Hutton
                                     Name:  Ronald W. Hutton
                                     Title: Treasurer

                                     Notice Address:

                                     1000 Alfred Nobel Drive
                                     Hercules, California 94547
                                     Attention: Chief Financial Officer (with
                                     a copy to the General Counsel)
                                     Telephone: (510) 741-7000
                                     Telecopy: (510) 741-5815













                             S-1

   <PAGE>


                                     AGENT:

                                     BANC ONE CAPITAL MARKETS,
                                     INC.,  as Agent


                                     By:  /s/ Grant R. Gieringer
                                     Name:  Grant R. Gieringer
                                     Title: Director

                                     Notice Address:

                                     1 Bank One Plaza
                                     Suite IL1-0701
                                     Chicago, Illinois 60670
                                     Attention: Robert Rasmus
                                     Telephone: (312) 732-5288
                                     Telecopy: (312) 336-4500








                               S-2
   <PAGE>


                                     LENDERS:

   Commitment:  $80,000,000          FIRST CHICAGO CAPITAL
                                     CORPORATION


                                     By:  /s/ Grant R. Gieringer
                                     Name:  Grant R. Gieringer
                                     Title: Director

                                     Notice Address:

                                     1 Bank One Plaza
                                     Suite IL1-0382
                                     Chicago, Illinois 60670
                                     Attention: L. Mary Decker
                                     Telephone: (312) 732-3005
                                     Telecopy: (312) 732-1760









                                 S-3
   <PAGE>


   Commitment:  $20,000,000          ABN AMRO BANK N.V.


                                     By:  /s/ Joseph Rizzi
                                     Name:  Joseph Rizzi
                                     Title: Senior Vice President


                                     By:  /s/ Dennis J. O'Malley
                                     Name:  Dennis J. O'Malley
                                     Title: Senior Vice President

                                     Notice Address:

                                     ABN AMRO Bank N.V.
                                     San Francisco Branch
                                     101 California Street, Suite 4550
                                     San Francisco, California 94111
                                     Attention: Jeffrey French
                                     Telephone: (415) 984-3730
                                     Telecopy: (415) 362-3524


                                     with a copy to:

                                     ABN AMRO Bank N.V.
                                     Credit Administration
                                     208 S. LaSalle Street, Suite 1500
                                     Chicago, Illinois 60604-1003
                                     Attention: Joe Coriaci
                                     Telephone: (312) 992-5118
                                     Telecopy: (312) 992-5111





                               S-4

   <PAGE>

                             ANNEX I

                          Lending Offices

   First Chicago Capital Corporation
   1 Bank One Plaza
   Suite IL1-0382
   Chicago, Illinois 60670
   Attention: L. Mary Decker
   Telephone: (312) 732-3005
   Telecopy: (312) 732-1760

   Payment Instructions for Loans in US Dollars:

   Fed ABA # 071000013
   Credit: LS2 Cash Account
   Account # 4811 52860000
   Reference: Bio-Rad
   Attention: Gloria Steinbrenner



   ABN AMRO Bank N.V.
   Loan Administration
   208 S. LaSalle Street, Suite 1500
   Chicago, Illinois 60604-1003
   Telephone: (312) 992-5153
   Telecopy: (312) 992-5158

   Payment Instructions for Loans in US Dollars:

   Pay to:        ABN AMRO Bank N.V., New York
   ABA:           026009580
   For credit to: ABN AMRO Bank N.V. - CPU
   Account #:     650-001-1789-41
   Reference:     Bio-Rad Laboratories, Inc.


   <PAGE>



                                                            EXHIBIT 23.1





                       REPORT OF INDEPENDENT PUBLIC ACCOUNTANT


          As independent public accountants, we hereby consent to the
          inclusion in this Form 8K of our report dated July 31, 1999.
          It should be noted that we have not audited any financial
          statements of Pasteur Sanofi Diagnostics subsequent to
          December 31, 1998 or performed any audit procedures subsequent
          to the date of our report.






                                            /s/ Philippe Mongin
          Paris, France                     PGA
          October 14, 1999                  Philippe Mongin
                                            Partner of Andersen Worldwide





      <PAGE>

                                                              Exhibit 99.1


                       REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

       To Pasteur Sanofi Diagnostics:

               We have audited the accompanying consolidated balance sheets of
       Pasteur Sanofi Diagnostics (PSD) (a French corporation) and Subsidiaries
       as of December 31, 1998 and 1997, and the related consolidated statements
       of operations,  stockholders' equity and cash flows for each of the three
       years in the period ended December 31, 1998. These financial statements
       are the responsibility of PSD's management. Our responsibility is to
       express an opinion on these financial statements based on our audits.

              We conducted our audits in accordance with generally accepted
       auditing standards in the United States of America. Those standards
       require that we plan and perform the audit to obtain reasonable assurance
       about whether the financial statements are free of material misstatement.
       An audit includes examining, on a test basis, evidence supporting the
       amounts and disclosures in the financial statements. An audit also
       includes assessing the accounting principles used and significant
       estimates made by management, as well as evaluating the overall financial
       statement presentation. We believe that our audits provide a reasonable
       basis for our opinion.

              In our opinion, the consolidated financial statements referred to
       above present fairly, in all material respects, the consolidated
       financial position of Pasteur Sanofi Diagnostics and Subsidiaries as of
       December 31, 1998 and 1997, and the results of their operations and
       their cash flows for each of the three years in the period ended
       December 31, 1998, in conformity with generally accepted accounting
       principles in the United States.

                                                 PGA
                                           /s/   Philippe Mongin
                                                 Partner of Andersen Worldwide

           Paris, France
           July 31, 1999

                                   1

      <PAGE>



                     PASTEUR SANOFI DIAGNOSTICS SA AND SUBSIDIARIES

              CONSOLIDATED BALANCE SHEETS AS OF DECEMBER 31, 1998 AND 1997
             (in millions of U.S. dollars, except share and per share data)
      <TABLE>
      <CAPTION>

                                                               1998      1997
       ASSETS
       <S>                                                     <C>       <C>
       Current Assets:
         Cash  . . . . . . . . . . . . . . . . . . . . . . . $  6.9    $  3.7
         Accounts receivable, net of allowance of
              $6.5 million and $6.5 million respectively . .   84.7      80.9
         Inventories:
           Raw materials  . . . . . . . . . . . . . . . . .     8.1       7.7
           Work in process  . . . . . . . . . . . . . . . .    13.5      12.7
           Finished goods.  . . . . . . . . . . . . . . . .    22.2      21.0
             Total inventories  . . . . . . . . . . . . . .    43.8      41.4
       Prepaid expenses and other current assets  . . . . .    10.9       9.2
       Current portion of note receivable . . . . . . . . .     4.3       4.2
             Total current assets . . . . . . . . . . . . .   150.6     139.4

       Property, Plant and Equipment:
           Land . . . . . . . . . . . . . . . . . . . . . .     0.6       0.6
           Buildings  . . . . . . . . . . . . . . . . . . .    36.8      31.0
           Equipment. . . . . . . . . . . . . . . . . . . .    96.4      86.3

             Total property, plant and equipment  . . . . .   133.8     117.9
           Accumulated depreciation   . . . . . . . . . . .   (91.7)    (79.2)

             Net property, plant and equipment. . . . . . .    42.1      38.7
       Note receivable, net of current portion  . . . . . .    18.0      20.8
       Intangible and other assets, net . . . . . . . . . .     1.2       1.4

             Total assets . . . . . . . . . . . . . . . . .  $211.9    $200.3

                          LIABILITIES AND STOCKHOLDERS EQUITY
       Current Liabilities:
         Lines of credit. . . . . . . . . . . . . . . . . .  $ 17.3    $ 16.7
         Accounts payable . . . . . . . . . . . . . . . . .    25.0      31.0
         Related entity payable, net. . . . . . . . . . . .    95.3      78.5
         Royalty accruals . . . . . . . . . . . . . . . . .     6.9       5.3
         Royalties payable to related entity. . . . . . . .     8.3       5.7
         Payroll accruals . . . . . . . . . . . . . . . . .     8.9       8.7
         Other current liabilities. . . . . . . . . . . . .    13.5      16.8

             Total current liabilities  . . . . . . . . . .   175.2     162.7
       Deferred Tax Liability . . . . . . . . . . . . . . .      --        --
       Long-Term Liabilities. . . . . . . . . . . . . . . .     9.9       7.5

       Commitments and Contingencies

       Stockholders' Equity:
         Common stock (par value of $20; 2,321,160 shares
          authorized, issued and outstanding as of
          December 31, 1998 and 1997) . . . . . . . . . . .   47.3      47.3
         Additional paid-in capital . . . . . . . . . . . .  182.2     182.2
         Accumulated deficit  . . . . . . . . . . . . . . . (179.5)   (175.7)
         Accumulated currency translation adjustment. . . .  (23.2)    (23.7)
             Total stockholders' equity . . . . . . . . . .   26.8      30.1

             Total liabilities and stockholders' equity. .  $211.9    $200.3

      </TABLE>

            The accompanying notes are an integral part of these statements.


                                   2
      <PAGE>

                      PASTEUR SANOFI DIAGNOSTICS SA AND SUBSIDIARIES

                           CONSOLIDATED STATEMENTS OF OPERATIONS
               (in millions of U.S. dollars, except share and per share data)

      <TABLE>
      <CAPTION>

                                                   Year Ended December 31,
                                                1998         1997       1996
       <S>                                      <C>          <C>        <C>
       Revenue:

          Net sales .......................... $201.8       $227.5     $259.9
          Royalty revenue ....................   17.9         18.3       20.6
          Related entity sales ...............    9.2         10.8        8.0
             Total revenue .................... 228.9        256.6      288.5

       Cost of Sales:
         Product cost of sales ...............   93.4        103.0      112.0
         Royalty expense .....................   15.6         13.9       13.8
         Related entity royalty expense.......   12.0         14.3       14.7

             Total cost of sales..............  121.0        131.2      140.5
             Gross profit ....................  107.9        125.4      148.0

       Operating Expenses:
         Selling, general and administrative..   74.4         89.7      112.1
         Distribution ........................    8.6          8.7       10.4
         Research and development ............   22.6         23.8       38.5

             Total operating expenses.........  105.6        122.2      161.0

             Operating income (loss) .........    2.3          3.2      (13.0)
       Interest expense, net .................   (5.4)        (5.9)      (8.9)
       Other, net ............................    0.3         (5.6)     (26.8)

             Pretax loss .....................   (2.8)        (8.3)     (48.7)
       Income tax.............................    1.0          0.7       (0.2)

       Net Loss .............................. $ (3.8)      $ (9.0)    $(48.5)

       Basic and diluted loss per share ...... $(1.63)      $(3.88)   $(20.89)

       Weighted average common
        shares outstanding ..................2,321,160    2,321,160  2,321,160

      </TABLE>

            The accompanying notes are an integral part of these statements.

                                   3

      <PAGE>

                 PASTEUR SANOFI DIAGNOSTICS SA AND SUBSIDIARIES

                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
              For the Years Ended December 31, 1998, 1997 and 1996
           (in millions of U.S. dollars, except share and per share data)

      <TABLE>
      <CAPTION>


                                                                    Accumulated
                                             Additional              Currency       Total
                                Common Stock   Paid-in  Accumulated Translation Stockholders
                              Shares    Amount Capital    Deficit    Adjustment     Equity
  <S>                       <C>        <C>      <C>      <C>          <C>         <C>
  Balance,
    December 31, 1995...... 2,321,160  $ 47.3   $182.2   $(118.2)     $(10.4)     $100.9
     Net loss .............        --      --      --      (48.5)         --       (48.5)
     Currency translation
      adjustment...........        --      --      --         --        (5.0)       (5.0)

  Balance,
   December 31, 1996......  2,321,160    47.3    182.2    (166.7)      (15.4)      (47.4)
     Net loss..............        --      --       --      (9.0)         --        (9.0)
     Currency translation
      adjustment...........        --      --        --       --        (8.3)       (8.3)

  Balance,
    December 31, 1997......  2,321,160   47.3    182.2    (175.7)      (23.7)       30.1
     Net loss..............         --     --       --      (3.8)         --        (3.8)
     Currency translation
      adjustment...........         --     --       --        --         0.5         0.5

  Balance,
     December 31, 1998.....  2,321,160  $47.3   $182.2    (179.5)     $(23.2)      $26.8

      </TABLE>

                The accompanying notes are an integral part of these statements.

                                   4

      <PAGE>


                  PASTEUR SANOFI DIAGNOSTICS SA AND SUBSIDIARIES

                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                          (in millions of U.S. dollars)

      <TABLE>
      <CAPTION>

                                                       Year Ended December 31,
                                                       1998      1997     1996
  <S>                                                 <C>      <C>      <C>
  Operating Activities:
    Net loss ......................................   $ (3.8)  $ (9.0)  $(48.5)
    Adjustment to reconcile net loss to net cash
     provided by (used in) operating Activities:
        Depreciation and amortization .............     11.3     15.4     24.0
        Loss on sale of assets ....................       --      3.9      1.3
    Changes in operating assets and liabilities:
        Decrease in inventories ...................      0.8      4.3      3.0
        Decrease (increase) in trade and other
         receivables ..............................      3.1     (3.5)    (3.1)
        Decrease in other assets ..................      3.7      1.4      2.4
        Increase (decrease) in accounts payable ...     (8.0)    16.9     (8.9)
        Increase (decrease) in other liabilities ..      0.1    (12.8)    29.7

          Net cash provided by (used in)
           operating activities....................      7.2     16.6     (0.1)

  Investing Activities:
    Purchase of property and equipment ............    (14.0)   (26.6)   (26.4)
    Proceeds from sales of property and equipment..       --     23.7      0.6

          Net cash used in investing activities....    (14.0)    (2.9)   (25.8)

  Financing Activities:
    Proceeds from (repayment of) lines of credit...     (0.6)   (31.4)     0.2
    Proceeds from related entity ..................     10.2     20.4     33.4
    Proceeds from issuance of long-term debt ......       --     (2.9)     4.3
    Repayment of principal of long-term debt ......       --       --    (14.8)

          Net cash provided by (used in)
           financing activities....................      9.6    (13.9)    23.1

  Effect of Foreign Exchange Rate Changes on Cash .      0.4     (0.6)    (0.4)
  Net Increase (Decrease) in Cash .................      3.2     (0.8)    (3.2)
  Cash and cash equivalents, beginning of year ....      3.7      4.5      7.7
  Cash and cash equivalents, end of year ..........   $  6.9   $  3.7   $  4.5

  Supplemental Disclosures of Cash Flow Information:
    Cash paid during the year for:
      Interest ....................................   $  5.7   $  6.4   $  4.5
      Income taxes ................................      0.9      1.1      0.3

      </TABLE>

         The accompanying notes are an integral part of these statements.

                                   5

     <PAGE>

                 PASTEUR SANOFI DIAGNOSTICS SA AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                       DECEMBER 31, 1998, 1997 AND 1996
                        (in millions of U.S. dollars)

   1.   Presentation of the Company:

   Pasteur Sanofi Diagnostics (PSD) is a Societe Anonyme registered in
   France. PSD is involved in the research, development, manufacture and
   distribution of diagnostics products, including primarily reagents and
   microplates systems. The shareholders of PSD are Sanofi-Synthelabo
   (Sanofi) and Institut Pasteur, 73.66 percent and 26.34 percent,
   respectively.

   PSD has an international presence with a strong position in Western
   Europe (49 percent of 1998 sales), emerging countries (28 percent of
   1998 sales), North America (16 percent of 1998 sales) and Japan (7
   percent of 1998 sales).

   On July 3, 1999, Bio-Rad entered into an agreement with Sanofi-
   Synthelabo and Institut Pasteur to acquire the stock of PSD and
   certain other ancillary assets and to repay debt of PSD for total
   consideration not to exceed $210 million, subject to adjustments. The
   purchase price will be funded with the proceeds of a senior
   subordinated note offering, together with borrowings under a new
   senior credit facility, which will include a term loan and a revolving
   credit facility.


   2.   Summary of Significant Accounting Policies:

   Basis of Presentation

   The consolidated financial statements include the accounts of PSD
   and its majority-owned subsidiaries after elimination of intercompany
   balances and transactions. All entities included in the financial
   statements have a 12-month period of operations that ended as of
   December 31. These financial statements have been prepared from the
   accounting records maintained in France. All amounts are presented in
   millions of U.S. dollars, except share amounts and unless otherwise
   noted.

   The preparation of financial statements in conformity with
   generally accepted accounting principles requires management to make
   estimates and assumptions that affect the amounts reported in the
   financial statements and accompanying notes. Changes in such estimates
   may affect amounts reported in the future.


   Foreign Currency Translation

   PSD's functional currency is the French Franc. In the accompanying
   financial statements, assets and liabilities are translated into U.S.
   dollars at the current exchange rate as of the applicable balance
   sheet dates. Revenue and expenses are translated at the weighted
   average exchange rate prevailing during the 12-month periods. Net
   exchange gains or losses resulting from the translation of assets and
   liabilities of foreign subsidiaries, except those in highly
   inflationary economies, are accumulated in a separate section of
   stockholders' equity entitled, "Accumulated currency translation
   adjustment."


   Concentration of Credit Risk

   Financial instruments that potentially subject PSD to concentration
   of credit risk consist primarily of trade accounts receivable. PSD
   performs credit evaluation procedures and generally does not require
   collateral. Credit risk is limited due to the large number of
   customers and their dispersion across many geographical areas. In
   addition, a significant amount of trade receivables are with national
   healthcare systems in countries within the European Economic
   Community. PSD does not currently anticipate a significant credit loss
   associated with these receivables.

                                   6
   <PAGE>

   Sanofi Fujirebio Diagnostics, Inc., a joint venture with Fujirebio,
   Inc., conducts all its business with Fujirebio, Inc. This represents
   sales of $14.5 million, $21.8 million and $9.3 million in 1998, 1997
   and 1996, respectively. The accounts receivable balances due from
   Fujirebio were $5.6 million in 1998 and $5.0 million in 1997.

   PSD has a note receivable from Beckman Instruments, Inc. Payment on
   this note is by installments, with an installment due on April 30 each
   year, up to and including April 30, 2004. The short-term element of
   this note receivable was $4.2 million in 1998 and $4.2 million in
   1997. The long-term portion of this note receivable was $18.0 million
   in 1998 and $20.8 million in 1997.


   Inventories

   Inventories are valued at the lower of average cost or market and
   include material, labor and overhead costs.


   Property, Plant and Equipment

   Property, plant and equipment are stated at cost. Depreciation and
   amortization computed using the straight-line method over the
   following estimated useful lives:

     Buildings..................... 20 years
     Leasehold improvements........ 3-10 years (or over the remaining
                                               lease term, if shorter)
     Software...................... 1-4 years
     Production equipment.......... 3-10 years
     Other equipment............... 10 years


   Retirement Benefits

   PSD accrues the costs of pension, termination and postretirement
   benefits during the years in which the employees render services.
   Related benefit expense is determined by an actuary, in accordance
   with SFAS 87. Liabilities and prepaid expenses are accrued on an
   actuarial basis using, in most cases, actuarial methods and
   assumptions that are compatible with U.S. GAAP requirements.

   For defined contribution plans and multiemployer pension plans,
   expenses are recorded as incurred. For defined benefit indemnities,
   retirement plans and postretirement benefit plans, liabilities and
   prepaid expenses are accrued over the estimated term of service of the
   employee using actuarial methods. Differences caused by actuarial
   gains or losses arising from changes in actuarial assumptions are
   amortized over the residual working life of the employees.


   Revenue Recognition

   Revenue from sales is recognized at the time products are shipped
   or service is rendered and all significant obligations of PSD are
   complete.

                                   7
   <PAGE>

   Research and Development Costs

   Research and development costs are charged to the profit and loss
   account as incurred.

   Forward Exchange Contracts

   PSD does not use derivative financial instruments for speculative
   or trading purposes. As part of distributing its products, PSD
   regularly enters into transactions in currencies other than the French
   Franc. Sanofi enters into forward foreign exchange contracts to hedge
   against future movements in foreign exchange rates that affect
   foreign-currency-denominated receivables and payables on behalf of
   PSD. These contracts generally have maturity dates of 11 months or
   less and relate primarily to currencies of industrial countries. The
   fee for the administration of these contracts is 0.1 percent of the
   face value of the transaction carried out on PSD's behalf. The
   resulting gains or losses are included in other income and expense
   offsetting exchange losses or gains on the related receivables and
   payables. Unrealized gains and losses are not deferred. Exchange gains
   and losses on these contracts are net of the premiums and discounts
   resulting from interest rate differentials between France and the
   countries of the currencies being traded.


   Income Taxes

   Deferred taxes are provided utilizing the liability method in
   accordance with by SFAS No. 109, "Accounting for Income Taxes,"
   whereby deferred tax assets are recognized for deductible temporary
   differences and operating loss carryforwards, and deferred tax
   liabilities are recognized for taxable temporary differences.
   Temporary differences are the differences between the reported amounts
   of assets and liabilities and their tax bases. Deferred tax assets and
   liabilities are adjusted for the effects of changes in tax laws and
   rates on the date of enactment. Deferred tax assets are reduced by a
   valuation allowance when, in the opinion of management, it is more
   likely than not that some portion or all of the deferred tax assets
   will not be realized.


   Earnings per Share

   Basic earnings per share are calculated on the basis of the
   weighted average number of common shares outstanding for each period.


   Fair Value of Financial Instruments

   For certain of PSD's financial instruments, including cash and cash
   equivalents, accounts receivable, accounts payable, long-term debt and
   forward exchange contracts, the carrying amounts approximate fair
   value. The fair values of other instruments are disclosed in relevant
   notes to the financial statements.


   3.   Divestitures:

   As a result of the increasing difficulties encountered in
   developing a profitable business with the AccessTM product line,
   particularly in North America, PSD divested this product line in 1996.

   Consequently, an asset purchase agreement was signed on March 24,
   1997, with the U.S. company Beckman Instruments Inc (Beckman), under
   which all Access-related intellectual property rights, the U.S.
   production facility and other Access assets worldwide were sold. The
   final purchase date was April 30, 1997.

   Three agreements were signed with Beckman:

                                   8

   <PAGE>

   . A manufacturing agreement for Access reagents produced in the
     French Steenvoord facility for a period of seven years.

   . A scientific cooperation agreement for a three-year period.

   . A distribution agreement, under which Beckman agreed to appoint
     PSD as its exclusive distributor for Access products in selected
     territories for a three-year period (five years in France).

   <TABLE>
   The estimated costs of this disposal were provided in the financial
   statements for the year ended December 31, 1996, for an aggregate
   amount of $26.4 million. The actual cost of the divestiture incurred
   in 1997 was $27.1 million, including the following:
   <CAPTION>

      <S>                                                       <C>
      Employee severance and relocation........................ $ 6.7
      Cost of transfer of manufacturing........................   3.3
      Loss on disposal.........................................  14.9
      Other related costs......................................   2.2

   </TABLE>

   The proceeds of the sale of $53.8 million included a cash portion
   of $23.7 million and a note of $30.1 million, which is payable in
   installments of $4.3 million on each anniversary of the sale date for
   seven years. The final payment will occur on April 30, 2004. This
   long-term note receivable was discounted at the closing date by $5.9
   million. The interest income included in the financial statements in
   relation to this receivable is $1.3 million for 1998 and 1997,
   respectively. The effective interest rate for this note is 5.7
   percent.

   Net sales from the Access product line for 1998, 1997 and 1996,
   respectively, were $37.8 million, $45.4 million and $57.1 million. The
   net operating income or losses are not separately identifiable.


   4.   Lines of Credit:
   <TABLE>
        PSD has the following short-term financing facilities:
   <CAPTION>


                                                   December 31,  December 31,
                                                      1998          1997
        <S>                                        <C>           <C>
        Authorized lines of credit................   $37.0         $35.0
        Outstanding amounts under lines of credit.    17.4          16.7
        Maximum balances outstanding..............    20.0          18.0
        Average balances outstanding..............    14.0          16.0

    </TABLE>

        Average interest rates on outstanding balances were 6.1 percent in
        1997 and 5.7 percent in 1998.


   5.   Operating Leases:

   <TABLE>
   PSD leases certain equipment and premises under operating leases
   that expire on various dates. Future payments on operating leases are
   due as follows:
   <CAPTION>


     Year Ending December 31,                                  Amount
     <S>                                                       <C>
       1999 .................................................   $5.2
       2000 .................................................    3.2
       2001 .................................................    2.0
       2002 .................................................    2.1
       2003 .................................................    2.1
       Thereafter............................................    6.0

           Total minimum lease payments......................  $20.6

     </TABLE>

   Net rental expense under operating lease was $4.5 million, $4.6
   million and $5.2 million in 1998, 1997 and 1996, respectively.

                                   9

     <PAGE>

   6.   Retirement Benefits:

   PSD provides various types of retirement and termination benefits
   to its employees. The type of benefits offered to an individual
   employee group is determined by the local legal requirements as well
   as the historical operating practices of the specific business unit.

   Pension benefits are generally determined using a formula that uses
   the employee's years of credited service and average final earnings.
   Termination benefits are generally lump-sum payments based upon an
   individual's years of credited service and annualized salary at
   retirement or termination of employment.

   The actuarial assumptions used vary by business unit and country,
   based upon local considerations, with the following averages:

      Benefit obligation discount rate............................4 to 6%
      Estimated annual rate of increase in future compensation....2 to 8%

   Net benefit costs related to PSD's defined benefit plans included
   the following components:

   <TABLE>
   Pension Benefits
   <CAPTION>


                                                   1998     1997     1996
                                                   ----     ----     ----
     <S>                                           <C>      <C>      <C>
     Net periodic cost:
       Service cost.............................. $(0.6)   $(0.7)   $(0.6)
       Expected interest cost....................  (0.4)    (0.4)    (0.5)
       Amortization of net transition obligation.  (0.2)    (0.2)    (0.3)
                                                  -----    -----    -----

       Net periodic benefit cost................. $(1.2)   $(1.3)   $(1.4)
                                                  =====    =====    =====

   </TABLE>


   <TABLE>
   The plans are unfunded. The net pension liability is included in
   long-term liabilities in the accompanying balance sheet. The following
   tables set forth the defined benefit plans' change in benefit
   obligation and the net pension liability:
   <CAPTION>


                                                    1998     1997     1996
                                                    ----     ----     ----
   <S>                                              <C>      <C>      <C>
   Change in projected benefit obligation:
     Projected benefit obligation at beginning of
      year........................................ $(8.9)   $(9.3)   $(8.6)
       Service cost...............................  (0.6)    (0.7)    (0.6)
       Interest cost..............................  (0.4)    (0.4)    (0.5)
       Actuarial gain.............................    --       --     (0.2)
       Benefits paid..............................   0.2      0.4      0.1
       Other (exchange rate)......................  (0.6)     1.2      0.5
                                                   -----    -----    -----
     Projected benefit obligation at end of year.. (10.3)    (8.8)    (9.3)
     Unrecognized actuarial loss..................   0.2      0.2      0.2
     Unrecognized actuarial transition obligation.   1.7      1.8      2.4
                                                   -----    -----    -----
     Net pension liability........................ $(8.4)   $(6.8)   $(6.7)
                                                   =====    =====    =====
   </TABLE>

   Multiemployer Plans

   Certain employees of PSD participate on a commingled basis with
   other (non-PSD) companies in defined benefit pension plans. Such
   commingled plans are known as multiemployer pension plans. Pension
   expense for multiemployer pension plans is recorded based upon the
   agreed funding requirements, and was $0.5 million, $0.5 million and
   $1.5 million for the years ended December 1998, 1997 and 1996,
   respectively. The decrease between 1996 and 1997 resulted from the
   sale in 1997 of the Access segment (581 active participants were
   terminated in April 1997).

                                   10

   <PAGE>

   The multiemployer pension plans include current and former
   employees of Sanofi. According to an agreement in principle between
   Sanofi and PSD, Sanofi remains liable for the benefit obligations
   accrued up to the closing date to the employees of SDP Inc. and
   Genetic Systems Corporation.

   Recent actuarial valuations indicate that only one multi-employer
   plan has a significant projected benefit obligation and that this plan
   is adequately funded.


   7.   Commitments and Contingencies:

   On April 30, 1997, Sanofi agreed to guarantee in favor of Beckman
   the full and timely payment by PSD or SDP Inc. of all sums due under
   their indemnification obligation provided by Article IX of the Asset
   Purchase Agreement entered into between PSD, SDP Inc. and Beckman on
   March 24, 1997, whereby PSD and SDP Inc. sold to Beckman their Access
   immunoassay analyzer business.

   Pursuant to such Asset Purchase Agreement, Beckman is entitled to
   be indemnified in full for any and all loss resulting from any
   proceedings by Johnson & Johnson Clinical Diagnostics Ltd. (or any
   successor-in-interest) against Beckman alleging infringement of
   European patent 149 565, U.S. Patent 4 745 077 or Japanese patent 60-
   159651 arising out of the manufacturing and/or sale by, or on behalf
   of, Beckman of the Access immunoassay analyzers and/or related
   consumables.

   Pursuant to an agreement dated April 28, 1997, PSD has agreed to
   hold Sanofi harmless from and against any sums that Sanofi may pay
   under the guaranty.

   Central Labo Europe (CLE) alleged breach of design and trademark by
   Europlastic, a supplier for PSD. The product in question is
   manufactured exclusively for PSD. PSD agreed to pay any damages
   awarded to CLE if Europlastic was found guilty. CLE is suing for $2.1
   million in damages. PSD is requesting DIAMED, the owner of the patent
   licensed to PSD, to hold it harmless in the CLE dispute, if necessary.

   In 1992, Biochem-Immuno Systems, Inc. ("Biochem") sued Institut
   Pasteur and PSD jointly, seeking a license under certain of Institut
   Pasteur's patents and further requesting damages of $11.3 million.
   Prior to the filing of the claim, the parties had engaged in
   discussions regarding a possible license arrangement but had not
   reached agreement before Biochem began marketing products covered by
   the Institut Pasteur patents. The matter is before the Superior Court
   of the District of Montreal, in the province of Quebec, Canada. Since
   1994, no papers have been filed and no actions have been taken by
   either party. Counsel for PSD believes the foregoing action has no
   merit and should be dismissed.

   PSD granted to Biomerieux a license to sell certain diagnostic
   products. Subsequently, Biomerieux purchased Cambridge Biotech
   Corporation ("Cambridge"), which had an existing separate license
   agreement with PSD granting it the right to sell different diagnostic
   products. The Cambridge-PSD license called for lower royalty payments
   than those provided in the Biomerieux-PSD agreement. PSD filed an
   action in Paris against Biomerieux on January 15, 1999 for unpaid
   royalties under the Biomerieux-PSD license. Biomerieux counterclaimed
   that it was entitled to lower royalty rates pursuant to the lower
   rates set forth in the Cambridge-PSD license and alternatively that it
   was entitled to indemnification from PSD for approximately $9.5
   million, which it alleged was the price it paid to acquire Cambridge.
   Counsel for PSD believes the counterclaim has no merit.

   PSD is a party to various other claims, legal actions and
   complaints arising in the ordinary course of business. In the opinion
   of management and counsel, the outcome of these claims and legal
   actions would have no material adverse effects on the future results
   of operations or the financial position of PSD.

   PSD is currently in dispute with the French tax administration,
   relating to tax treatment of royalties paid on unpatented techniques
   and withholding tax on an intercompany loan. The total amount in
   dispute is $1.5 million. According to PSD policy these disputed
   amounts have not been paid, nor have they been provided for, but
   warranty has been provided to the French tax administration, as
   required under French tax law.

                                   11

   <PAGE>

   The practices, which gave rise to the dispute described above, have
   continued to be applied on a consistent basis since the period subject
   to tax audit (1991-1994). The tax exposure resulting from the
   continued use of these practices, excluding penalties is estimated at
   $0.8 million per year. These risks are covered by Sanofi's
   indemnification of Bio-Rad pursuant to the purchase agreement between
   Bio-Rad and Sanofi.

   PSD and its subsidiaries are committed to purchase Access
   consumables for a minimum amount of $8.5 million and a minimum number
   of 90 Access instruments from Beckman Coulter during 1999.

   PSD has $13.4 million to be received against foreign currencies
   delivered (out of which $9.3 million relates to Japanese Yen and $3.1
   million relates to U.S. dollars), and $12.7 million to deliver against
   foreign currencies to be received (out of which $11.7 million relates
   to U.S. dollars).

   PSD has granted comfort letters or guarantees to banks in favor of
   its subsidiaries to secure local borrowings, for a total of $16.2
   million.


   8.   Other, Net:
   <TABLE>
   Other, net comprises the following items:
   <CAPTION>


                                                  1998    1997     1996
                                                  ----    ----     ----
       <S>                                        <C>     <C>      <C>
       Effects of Access sale...................  $ --   $(6.0)  $(26.4)
       Foreign exchange gains...................   1.0     0.8      0.2
       Foreign exchange losses..................  (0.4)   (0.6)      --
       Other....................................  (0.3)    0.2     (0.6)
                                                  ----   -----   ------
           Total................................  $0.3   $(5.6)  $(26.8)
                                                  ====   =====   ======
   </TABLE>

   9.   Royalty Income and Expense:

   PSD has royalty agreements with Sanofi, Institut Pasteur and other
   third party license holders. The related party element of these
   royalty income and expenses are disclosed under Note 11.

   PSD grants sublicenses to third parties for the use of patents in
   order to manufacture and distribute products using such patents. These
   sublicense agreements generally provide for the payment of royalties
   based on sales of the licensee related to such products. Related
   revenue is recognized at the time of the sale.

   Royalty expense includes royalties which are due for the use of
   patents to manufacture and distribute certain products. These are
   calculated on the basis of a percentage of sales made by PSD or its
   sublicensees or on the basis of unitary fixed amounts of the products.
   Related expenses are recognized at the time of the sale of the
   products.


   10.   Income Taxes:

   PSD has a tax sharing agreement with Sanofi. Income taxes have been
   calculated for PSD and each of its subsidiaries on a separate company
   basis pursuant to the requirements of Statement of Financial
   Accounting Standards No. 109, "Accounting for Income Taxes."

                                   12

  <PAGE>

   <TABLE>
   The components of pretax loss are as follows:
   <CAPTION>


                                                  1998    1997     1996
                                                  ----    ----     ----
     <S>                                         <C>     <C>      <C>
     French..................................    $(1.9)  $19.5   $(25.4)
     International...........................     (0.9)  (27.8)   (23.3)
                                                 -----   -----    -----
       Income before taxes and extraordinary
         charge..............................    $(2.8)  $(8.3)  $(48.7)
                                                 =====   =====   ======
   </TABLE>

   <TABLE>
   The provision for income taxes consists of:
   <CAPTION>

                                                  1998    1997     1996
                                                  ----    ----     ----
   <S>                                            <C>     <C>      <C>
   Current:
      French.................................     $0.1   $(0.4)   $(0.2)
      International..........................      0.9     1.1      0.1
                                                  ----   -----    -----
   Provision for income taxes................     $1.0   $ 0.7    $(0.1)
                                                  ====   =====    =====

   </TABLE>

   <TABLE>
   PSD's income tax provision differs from the amount computed by
   applying the French statutory rate to income before taxes as follows:
   <CAPTION>


                                1998    %       1997    %      1996     %
                                ----   ---      ----   ---     ----    ---
   <S>                          <C>   <C>       <C>    <C>     <C>    <C>
    Income charged at
      statutory tax rate.......$(1.2) (41.7)   $(3.5) (41.7)  $(17.8) (36.7)
    Permanent differences...... (0.3) (10.5)    (8.0) (96.0)    11.8   24.4
    Differences between French
      statutory rate and
      other tax rates.......... (0.5) (16.5)     3.7   44.1       --     --
    Tax credits used........... (0.2)  (8.9)    (0.8) (10.1)    (1.7)  (3.5)
    Utilization of carryforward
      losses................... (0.5) (17.7)    (1.0) (12.0)    (0.2)  (0.5)
    Effect of carryforward
      losses...................  3.6  127.7     10.9  131.8      7.9   16.4

    Other......................  0.1    3.4     (0.6)  (7.8)     0.2   (0.4)
                                ----  -----     ----  -----    -----   ----
        Actual tax charge......$ 1.0   35.8    $ 0.7    8.3     $0.2   (0.3)

   </TABLE>

   <TABLE>
   The components of the deferred tax asset (liability) consisted of
   the following:
   <CAPTION>

                                                  December 31,   December 31,
                                                      1998           1997
                                                  ------------   ------------
   <S>                                           <C>            <C>
     Current deferred tax asset:
        Temporary timing differences.............    $ 5.0          $ 13.0
        Other temporary differences between tax
         reporting and U.S. GAAP
         financial reporting:
           Elimination of intercompany profit....      3.6             4.1
           Tax benefit of loss carryforwards.....     71.6            66.6
           Other, net............................      5.4             3.1
                                                     -----          ------
           Total deferred tax asset..............     85.6            86.8
           Valuation allowance...................    (85.6)          (86.8)
                                                     -----          ------
     Net current deferred tax asset..............    $  --          $   --
                                                     =====          ======
     Noncurrent deferred tax liability...........    $  --          $   --
                                                     =====          ======
    </TABLE>

   The valuation allowance is needed to reduce the deferred tax asset
   to an amount that is more likely than not to be realized.

                                   13

    <PAGE>

   <TABLE>
   At December 31, 1998, PSD had net operating loss carryforwards of
   $107.9 million and $136.0 million of capital loss carryforwards. These
   carryforwards will expire in the following years:
   <CAPTION>


                                          Net Operating       Capital Losses
   Expiration Date                      Loss Carryforward      Carryforward
   ---------------                      -----------------    ---------------
   <S>                                  <C>                  <C>
     2000.............................       $   --              $   --
     2001.............................          0.1                 5.0
     2002.............................          0.4                  --
     2003.............................          0.6                  --
     2004 to 2012.....................        104.1               131.0
     Unlimited........................          2.7                  --
                                             ------              ------
                                             $107.9              $136.0
                                             ======              ======
   </TABLE>

   These carryforwards mainly relate to the subsidiaries located in
   France and in the United States of America and their utilization is
   limited to the separate taxable income of the subsidiaries. The
   capital losses carryforward may only be utilized against future
   capital gains.

   PSD does not provide for taxes that would be payable if the
   cumulative undistributed earnings of its international subsidiaries
   were remitted. Unless it becomes advantageous for tax or foreign
   exchange reasons to remit a subsidiary's earnings, such earnings are
   indefinitely reinvested in subsidiary operations.


   11.   Related Entity Transactions and Balances:

   PSD makes sales to other companies within the Sanofi group. Such
   sales are included in the profit and loss account.

   PSD has a royalty agreement with Institut Pasteur. Royalty expense
   includes royalties paid for the use of the Pasteur name. These are
   calculated on the basis of a percentage varying between 1 percent and
   2 percent of net sales in each subsidiary.

   Additional transactions with Institut Pasteur (mainly relating to
   research and development costs and rights to first refusal on new
   products) were $2.1 million, $2.3 million and $2.7 million in 1998,
   1997 and 1996, respectively. Additionally, PSD's premises at Marnes la
   Coquette are leased to PSD by Institut Pasteur. The rentals charged
   through the profit and loss account with respect to this lease
   agreement were $0.9 million, $0.9 million and $1.0 million in 1998,
   1997 and 1996, respectively.

   <TABLE>
   Elements of costs incurred by Sanofi on behalf of PSD are also
   included in the profit and loss account as follows:
   <CAPTION>


                                                  1998    1997    1996
                                                  ----    ----    ----
     <S>                                          <C>     <C>     <C>
     Sales representatives.....................  $ 3.6   $ 4.4   $ 3.2
     Shared services...........................    3.4     4.0     4.9
     Holding company costs.....................    0.2     0.3     0.2
     Finance costs.............................    4.7     4.9     4.5
                                                 -----   -----   -----
         Total.................................  $11.9   $13.6   $12.8
                                                 =====   =====   =====
   </TABLE>

   Shared service and sales representatives' costs are charged to PSD
   at cost plus a mark-up of 1 percent to 5 percent and include both
   direct and indirect costs, while holding company expenses are
   calculated on the basis of actual costs incurred and allocated based
   on headcount and sales figures for each Sanofi division. Finance costs
   are the actual costs incurred by each Sanofi division in using the
   Sanofi cash-pooling facility. The cost of borrowing is based on the
   market rate plus a margin.

                                   14

   <PAGE>

   Sanofi also provides working capital financing. Interest is payable
   on the net related entity payable at a rate of 3.5 percent to 4.5
   percent. The interest charged was $5.0 million, $5.3 million and $5.2
   million in 1998, 1997 and 1996, respectively. Interest receivable from
   related parties was $0.3 million, $0.4 million and $0.6 million for
   1998, 1997 and 1996, respectively.


   12.   Employee Profit-Sharing Plans:

   Sanofi operates a profit-sharing plan. Profit sharing is calculated
   on the basis of actual evolution of consolidated earnings per share of
   the Sanofi group.

   The amounts included in the profit and loss account for employee
   profit sharing for 1998, 1997 and 1996 are $2.5 million, $2.1 million
   and $2.0 million, respectively.


   13.   Segment Information:
   <TABLE>
   The business is managed through zones defined by country of origin
   of sales. All sales are derived from in-vitro diagnostic products.
   Geographic sales data is presented below:
   <CAPTION>

                                   1998   %      1997   %       1996   %
                                   ----  ---     ----  ---      ----  ---
     <S>                           <C>   <C>    <C>    <C>     <C>   <C>
     France....................   $101.7  48    $101.0  42     $109.6  41
     USA.......................     33.3  16      44.4  19       63.1  24
     Other foreign.............     76.0  36      92.8  39       95.2  35
                                  ------ ---    ------ ---     ------ ---
         Total.................   $211.0 100    $238.2 100     $267.9 100
                                  ====== ===    ====== ===     ====== ===
   </TABLE>

   <TABLE>
   The following presents long-lived assets by geographical area,
   based upon the location of the asset:
   <CAPTION>


                                                  1998     1997     1996
                                                  ----     ----     ----
     <S>                                          <C>      <C>      <C>
     France.................................     $23.5    $24.6    $24.8
     USA....................................      32.4     31.1     47.6
     Other foreign..........................       5.4      5.0     12.2
                                                 -----    -----    -----
         Total..............................     $61.3    $60.7    $84.6
                                                 =====    =====    =====
   </TABLE>

                                   15



<PAGE>

                                                                 Exhibit 99.2


                    PASTEUR SANOFI DIAGNOSTICS SA AND SUBSIDIARIES
                    CONSOLIDATED BALANCE SHEET AS OF JUNE 30, 1999
                   (in million of U.S. dollars, except share data)

<TABLE>
<CAPTION>

                                 ASSETS                              (Unaudited)
        <S>                                                         <C>
        Current Assets:
            Cash .................................................  $  11.3
            Accounts'receivable, net of allowance of $4.9.........     74.1
            Inventories:
            Raw materials ........................................      7.2
            Work in process ......................................     11.8
            Finished goods .......................................     19.5
              Total inventories...................................     38.5

            Prepaid expenses and other current assets ............     13.3
            Current portion of note receivable ...................      4.1

              Total current assets ...............................    141.3

        Property, Plant and Equipment:
           Land ..................................................      0.6
           Buildings ..............................................    35.2
           Equipment ..............................................    89.4

              Total property, plant and equipment...................  125.2
           Accumulated depreciation ................................  (88.8)

              Net property, plant and equipment.....................   36.4

        Intangible assets, net .....................................    1.6
        Notes receivables, net of current portion...................   14.3
        Other assets ...............................................    0.6

             Total assets .......................................... $194.2

                         LIABILITIES AND STOCKHOLDERS' EQUITY
        Current Liabilities:
           Lines of credit .........................................  $ 19.8
           Accounts payable ........................................    23.0
           Related entity payable ..................................    84.1
           Other current liabilities ...............................    33.7
        Total current liabilities ..................................   160.6

        Long-term liabilities ......................................     8.7

        Stockholders' Equity:
           Common stock (par value of $20; 2,321,160 shares authorized,



              issued and outstanding) ..............................    47.3
           Additional paid-in capital ..............................   182.2
           Accumulated deficit .....................................  (179.3)
           Accumulated currency translation adjustment .............   (25.3)
               Total stockholders' equity ..........................    24.9

              Total liabilities and stockholders' equity              $194.2

     </TABLE>

     The accompanying notes are an integral part of these statements.

                                   1

     <PAGE>

                    PASTEUR SANOFI DIAGNOSTICS SA AND SUBSIDIARIES

                         CONSOLIDATED STATEMENT OF OPERATIONS
                        For the six month ending June 30, 1999
            (in millions of U.S. dollars, except share and per share data)
     <TABLE>
     <CAPTION>

                                                                     (Unaudited)
     <S>                                                              <C>
     Revenue:
         Net sales..............................................      $  111.5
         Royalty revenue........................................           8.4
              Total.............................................         119.9

     Cost of Sales:
         Product cost of sales..................................          49.6
         Royalty expense........................................          14.3
              Total cost of sales...............................          63.9

     Operating Expenses:
         Selling, general and administrative....................          37.2
         Distribution...........................................           4.4
         Research and development...............................          10.9

              Total operating expenses..........................          52.5

              Operating income..................................           3.5
     Interest expense...........................................          (1.9)
     Other, net.................................................          (1.1)

              Pretax income.....................................           0.5
     Income tax.................................................           0.3

     Net income.................................................      $    0.2

     Weighted average common shares.............................     2,321,160

     Basic and diluted earnings per share.......................      $   0.09

     </TABLE>

           The accompanying notes are an integral part of these statements


                                   2

     <PAGE>

                     PASTEUR SANOFI DIAGNOSTICS SA AND SUBSIDIARIES

                     CONSOLDATED STATEMENT OF STOCKHOLDERS' EQUITY
                        For the six months ending June 30, 1999
                    (in millions of U.S. dollars, except share data)
    <TABLE>
    <CAPTION>


                                                                      Accumulated
                                               Additional               Currency    Total
                                Common Stock    Paid-in   Accumulated  Translation Stockholders'
                                Shares   Amount  Capital   Deficit     Adjustment    Equity
      <S>                      <C>       <C>     <C>       <C>         <C>            <C>
      Balance,
        December 31, 1998..... 2,321,160 $47.3   $182.2    $(179.5)    $(23.2)        $26.8
          Net Income..........                                 0.2                      0.2
          Currency Translation
           Adjustment.........                                           (2.1)         (2.1)

      Balance, June 30, 1999.. 2,321,160 $47.3   $182.2    $(179.3)    $(25.3)        $24.9

      </TABLE>

            The accompanying notes are an integral partof these statements.

                                   3

      <PAGE>


                     PASTEUR SANOFI DIAGNOSTICS SA AND SUBSIDIARIES

                          CONSOLIDATED STATEMENT OF CASH FLOWS
                        For the six months ending June 30, 1999
                             (in millions of U.S. dollars)
     <TABLE>
     <CAPTION>



                                                                      (Unaudited)
     <S>                                                               <C>
     Operating Activities:
        Net income.................................................    $  0.2
        Adjustment to reconcile net loss to net cash
         provided by operating activities:
           Depreciation and amortization...........................       5.3
           Loss on sale of assets..................................       0.1
     Changes in operating assets and liabilities:
           Decrease in inventories.................................       5.3
           Decrease in trade and other receivables.................      10.6
           Increase in other assets................................      (2.2)
           Decrease in accounts payable............................      (2.0)
           Decrease in other liabilities...........................      (3.9)

               Net cash provided by operating activities...........      13.4

     Investing Activities:
           Purchase of property and equipment......................      (5.1)
           Proceeds from sales of property and equipment...........       0.1

               Net cash used in investing activities...............      (5.0)

     Financing Activities:
           Proceeds from lines of credit, net......................       2.5
           Proceeds from long-term receivable......................       4.5
           Repayment to related entity, net........................     (11.2)

               Net cash used in financing activities...............      (4.2)

     Effect on foreign exchange rate changes on cash...............       0.2

     Net increase in cash..........................................       4.4
     Cash and cash equivalents, beginning of year..................       6.9

     Cash and cash equivalents, end of year........................    $ 11.3

     </TABLE>

            The accompanying notes are an integral part of these statements.


                                   4

     <PAGE>


                     PASTEUR SANOFI DIAGNOSTICS SA AND SUBSIDIARIES
                       NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                     JUNE 30, 1999
                             (in millions of U.S. dollars)


     1.  BASIS OF PRESENTATION:

     The accompanying unaudited condensed financial statements of PSD and
     Subsidiaries, ("PSD" or the "Company"), reflect all adjustments which
     are, in the opinion of management, necessary to a fair statement of the
     results of the interim period presented.  All such adjustments are of a
     normal recurring nature.  All amounts are presented in millions of U.S.
     dollars, except share amounts, and unless otherwise noted.  The
     condensed consolidated financial statements should be read in
     conjunction with the notes to the consolidated financial statements
     contained in the Company's report for the years ended December 31, 1998
     and 1997.

     2.  SEGMENT INFORMATION:

     <TABLE>
     The business is managed through zones defined by country of origin of sales.
     All sales are derived from in-vitro diagnostic products.  Geographic sales
     data are presented below:
     <CAPTION>

                                                                       6/30/99
                                                                       -------
          <S>                                                            <C>
          France ......................................................  52.9
          United States ...............................................  16.4
          Other foreign ...............................................  42.2
              Total ................................................... 111.5
     </TABLE>

     <TABLE>
     The following presents long-lived assets by geographical area based upon
     the location of the asset:
     <CAPTION>

                                                                       6/30/99
                                                                       -------
          <S>                                                            <C>
          France ......................................................  19.3
          United States ...............................................  28.9
          Other foreign ...............................................   4.7
              Total ...................................................  52.9

     </TABLE>

     3.  SUBSEQUENT EVENTS:

     On July 3, 1999, Bio-Rad entered into an agreement with Sanofi-Synthelabo
     and Institut Pasteur to acquire the stock of PSD and certain other
     ancillary assets and to repay debt of PSD for total consideration not
     to exceed $210 million, subject to adjustments.  The purchase price will
     be funded with the proceeds of a senior subordinated note offering,
     together  with  borrowings under  a new  senior  credit facility,  which
     will include a term loan and a revolving credit facility.

                                   5





 <PAGE>
                                                                Exhibit 99.3



                        UNAUDITED PRO FORMA CONDENSED
                     CONSOLIDATED FINANCIAL STATEMENTS


      The following unaudited pro forma condensed consolidated
   financial information is based on the historical consolidated
   financial statements of Bio-Rad Laboratories, Inc. ("Bio-Rad")and
   Pasteur Sanofi Diagnostics S.A. ("PSD").  The pro forma adjustments
   were applied to the respective historical financial statements to
   reflect and account for the purchase of PSD.  Under purchase
   accounting, the purchase cost will be allocated to acquired assets and
   liabilities based on their relative fair values at the effective date
   of the acquisition, October 1, 1999, based on valuations and other
   studies which are not yet complete.  The purchase price exceeds the
   fair value of the net assets acquired.  For these pro forma
   calculations, this difference has been allocated to goodwill which
   will be amortized over ten years.  Such allocations are subject to
   final determination based on real estate, leasehold and equipment
   valuation studies and a further review of the books, records and
   accounting policies of PSD.  Accordingly, the final allocations will
   be different from the amounts reflected herein.  However, based on
   current information, management does not presently expect the final
   allocations to differ materially from the amounts presented herein.

      The unaudited pro forma consolidated balance sheet as of June 30,
   1999 gives effect to (i) the acquisition of PSD applying the purchase
   method of accounting, (ii) borrowing under a new credit facility and
   a new senior subordinated credit agreement, (iii) the elimination of
   any intercompany transactions and (iv)refinancing of the existing
   credit facility and payment of related fees and expenses
   (collectively, the "Transactions") as if they had occurred on that
   date.

     The unaudited pro forma financial statements of operations for the
   year ended December 31, 1998 and the six months ended June 30, 1999
   give effect to the Transactions as if they had occurred at the
   beginning of the respective periods.  The unaudited pro forma
   adjustments are based upon available information and certain
   assumptions that we believe are reasonable under the circumstances.
   The unaudited pro forma consolidated financial statements do not
   purport to represent what the results of operations or financial
   condition would actually have been had the Transactions in fact
   occurred on such dates, nor do they purport to project the results of
   operations or financial condition for any future period or date.



                                   1
<PAGE>






      The unaudited pro forma financial statements do not reflect any of
   the anticipated cost savings that we expect to achieve through the
   integration of the operations of Bio-Rad and PSD.



                UNAUDITED PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET
                                  AS OF JUNE 30, 1999
                                      (in millions)
 <TABLE>
 <CAPTION>
                                            Bio-Rad   PSD
                                             Actual  Actual Adjustments  Pro Forma
            ASSETS
    <S>                                      <C>     <C>    <C>          <C>
    Cash . . . . . . . . . . . . . . . . . . $ 11.6  $ 11.3              $   22.9
    Accounts receivable, net . . . . . . . .  104.9    74.1                 179.0
    Inventories  . . . . . . . . . . . . . .   91.7    38.5                 130.2
    Other. . . . . . . . . . . . . . . . . .   26.8    17.4                  44.2
        Total current assets                  235.0   141.3                 376.3
    Property, plant and equipment. . . . . .   82.8    36.4                 119.2
    Goodwill . . . . . . . . . . . . . . . .   17.6     1.6  $132.5  (A)    151.7
    Other non-current assets . . . . . . . .   35.9    14.9    (6.0) (B)     44.8
       Total assets                          $371.3  $194.2  $126.5        $692.0

       LIABILITIES AND STOCKHOLDERS' EQUITY
    Notes payable and current portion of
     long-term debt . . . . . . . . . . . .  $  7.0  $ 19.8             $    26.8
    Accounts payable . . . . . . . . . . . .   23.5    23.0                  46.5
    Accrued liabilities. . . . . . . . . . .   54.7   117.8   $(66.1)(C)    106.4
    Total current liabilities. . . . . . . .   85.2   160.6    (66.1)       179.7
    Long-term debt . . . . . . . . . . . . .   42.2      --    217.5 (D)     259.7
    Other long-term liabilities. . . . . . .   15.1     8.7                  23.8
    Total liabilities  . . . . . . . . . . .  142.5   169.3    151.4        463.2
    Stockholders' equity . . . . . . . . . .  228.8    24.9    (24.9)(E)    228.8
        Total liabilities and
           stockholders' equity  . . . . . . $371.3  $194.2   $126.5      $ 692.0


 </TABLE>

                                   2

<PAGE>


     NOTES TO UNAUDITED PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET
                              (in millions)

  (A) Represents the estimated goodwill resulting from the PSD
      acquisition. The acquisition cost is subject to certain closing
      adjustments that may lower the final amount of goodwill. We are
      in the process of obtaining certain evaluations,estimations,
      appraisals and actuarial and other studies for purposes of
      computing the final amount of goodwill resulting from purchase
      price allocations. These amounts are estimates and may change.

         Assumed goodwill . . . . . . . . . . . . . . . .   $101.0
         Transactions costs . . . . . . . . . . . . . . .     13.5
         Restructuring costs  . . . . . . . . . . . . . .     18.0
                                                            $132.5

  (B) Represents the sale of $6.0 million of marketable securities
      at market value as of June 30, 1999.

  (C) Represents the elimination of PSD debt due to Sanofi-Synthelabo
      and the accrual of restructuring charges estimated in connection
      with the acquisition, which include estimates of severance and
      relocation expenses.

            Related entity payable    . . . . . . . . . . .    $(84.1)
            Restructuring reserve     . . . . . . . . . . .      18.0
                                                                (66.1)

  (D) Represents the additional debt necessary to fund the
      Transactions, net of debt repayment.

             Additional debt(long-term):
                 New Credit Facility:
                     Term Loan . . . . . . . . . . . . . .     $100.0
                     Revolving Facility. . . . . . . . . .       59.5
                 Senior Subordinated Credit Agreement. . .      100.0
                                                                259.5
             Repay existing credit facility. . . . . . .        (42.0)
                                                               $217.5

  (E) Represents the elimination of PSD's equity.




                                   3

<PAGE>


                UNAUDITED PRO FORMA CONDENSED CONSOLIDATED INCOME STATEMENT
                           FOR THE YEAR ENDED DECEMBER 31, 1998
                      (in millions except share and per share data)

 <TABLE>
 <CAPTION>
                                           Bio-Rad      PSD
                                           Actual      Actual   Adjustments   Pro Forma

    <S>                                    <C>        <C>       <C>           <C>
    Total revenue . . . . . . . . . . . .  $441.9     $228.9     $ (1.0)(A)    $ 669.8
    Cost of goods sold. . . . . . . . . .   202.4      121.0       (0.6)(A)      322.8
    Gross profit. . . . . . . . . . . . .   239.5      107.9       (0.4)(A)      347.0
    Selling, general and administrative
      expense . . . . . . . . . . . . . .   167.0       83.0                     250.0
    Research and development expense. . .    41.4       22.6                      64.0
    Income from operations. . . . . . . .    31.1        2.3        (0.4)         33.0
    Interest expense, net . . . . . . . .    (3.7)      (5.4)      (18.3)(B)     (27.4)
    Other income (expense). . . . . . . .     6.8        0.3       (13.2)(C)      (6.1)
    Income (loss) before taxes. . . . . .    34.2       (2.8)      (31.9)         (0.5)
    Provision for income tax. . . . . . .     9.9        1.0        (9.6)(D)       1.3
    Net income (loss) . . . . . . . . . .  $ 24.3     $ (3.8)     $(22.3)      $  (1.8)

    Basic earnings per share:
     Net income (loss) . . . . . . . . .    $1.98     $(1.63)                   $(0.15)
     Weighted average common shares(000's) 12,264      2,321                    12,264

    Diluted earnings per share:
     Net income (loss) . . . . . . . . .    $1.97     $(1.63)                   $(0.15)
     Weighted average common shares(000's) 12,358      2,321                    12,358

  </TABLE>

                UNAUDITED PRO FORMA CONDENSED CONSOLIDATED INCOME STATEMENT
                          FOR THE SIX MONTHS ENDED JUNE 30, 1999
                       (in millions except share and per share data)

 <TABLE>
 <CAPTION>
                                          Bio-Rad      PSD
                                          Actual      Actual   Adjustments   Pro Forma

   <S>                                    <C>        <C>       <C>           <C>
   Total revenue . . . . . . . . . . . .  $241.5     $119.9     $ (0.5)(A)    $ 360.9
   Cost of goods sold. . . . . . . . . .   106.1       63.9       (0.3)(A)      169.7
   Gross profit. . . . . . . . . . . . .   135.4       56.0       (0.2)(A)      191.2
   Selling, general and administrative
     expense . . . . . . . . . . . . . .    84.7       41.6                     126.3
   Research and development expense. . .    21.5       10.9                      32.4
   Income from operations. . . . . . . .    29.2        3.5        (0.2)         32.5
   Interest expense, net . . . . . . . .    (1.7)      (1.9)      (10.0)(B)     (13.6)
   Other income (expense). . . . . . . .    (1.3)      (1.1)       (6.6)(C)      (9.0)
   Income (loss) before taxes. . . . . .    26.2        0.5       (16.8)          9.9
   Provision for income tax. . . . . . .     7.5        0.3        (4.2)(D)       3.6

   Net income (loss) . . . . . . . . . . $  18.7     $  0.2      $(12.6)       $  6.3

   Basic earnings per share:
    Net income. . . . . . . . . . . . .    $1.54      $0.01                    $ 0.52
    Weighted average common shares(000's) 12,102      2,321                    12,102

   Diluted earnings per share:
    Net income. . . . . . . . . . . . .    $1.54      $0.01                    $ 0.52
    Weighted average common shares(000's) 12,144      2,321                    12,144


</TABLE>

                                   4

<PAGE>

                NOTES TO UNAUDITED PRO FORMA CONSOLIDATED INCOME STATEMENTS
                                      (in millions)

   (A)Eliminates intercompany sales and related cost of sales.

   (B)Represents the incremental interest expense related to the increased debt
      of the combined company for the period.
 <TABLE>
 <CAPTION>
                                                            Dec. 31,        June 30,
                                                              1998            1999

      <S>                                                    <C>            <C>
      Elimination of historical interest expense . . . . .    $(9.0)         $(3.8)
      Interest expense with respect to the
         New Credit Facility (1)(3)  . . . . . . . . . . .     16.3            8.3
      Interest expense with respect to the Senior
      Subordinated Credit Agreement(2)(3). . . . . . . . .     11.0            5.5
                                                              $18.3          $10.0

 </TABLE>
      (1) Assumes that loans under the New Credit Facility (which bear interest
          at floating rates) and all remaining outstanding debt other than the
          Senior Subordinated Credit Agreement bear interest at a weighted
          average interest rate of 8.5% per annum.

      (2) Assumes that loans under the Senior Subordinated Credit Agreement
          (which bear interest at floating rates) bear interest at a weighted
          average interest rate of 11.0% per annum.

      (3) The actual interest expense could differ from the above amounts based
          on increases or decreases on floating rate debt. A change of 0.5% in
          assumed interest rates on the Senior Subordinated Credit Agreement
          and anticipated borrowings under the new credit facility will have
          the effect of changing interest expense by $1.5 million for the
          year ended December 31,1998 and $0.75 million for the six months
          ended June 30, 1999.

   (C)Represents the amortization of goodwill including capitalized transaction
      and restructuring costs arising from the PSD acquisition over a ten-year
      period.

   (D)Represents the tax effect of additional interest expense and goodwill
      amortization and to record PSD taxes at Bio-Rad's effective rate.



                                   5




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