DANAHER CORP /DE/
S-4, 1999-06-03
CUTLERY, HANDTOOLS & GENERAL HARDWARE
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<PAGE>

      As filed with the Securities and Exchange Commission on June 3, 1999
                                                        Registration No. 333-[ ]

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                --------------
                                    FORM S-4
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933

                                --------------
                              DANAHER CORPORATION
             (Exact name of Registrant as Specified in Its Charter)

                                                            59-1995548
         Delaware                    3420                (I.R.S. Employer
     (State or other          (Primary Standard        Identification No.)
     jurisdiction of      Industrial Classification
     incorporation or            Code Number)
      organization)

                            1250 24th Street, N.W.
                            Washington, D.C. 20037
                                (202) 828-0850
  (Address, including zip code, and telephone number, including area code, of
                   registrant's principal executive offices)

                              Patrick W. Allender
               Senior Vice President and Chief Financial Officer
                              Danaher Corporation
                             1250 24th Street, N.W.
                             Washington, D.C. 20037
                                 (202) 828-0850
 (Name, address, including zip code, and telephone number, including area code,
                             of agent for service)
                                --------------
                                With copies to:
        Trevor S. Norwitz, Esq.                   Robert O. Case, Esq.
     Wachtell, Lipton, Rosen & Katz      McBride Baker & Coles 500 West Madison
          51 West 52nd Street                      Street 40th Floor
        New York, NY 10019-6150          Chicago, Illinois 60661-2511(312) 715-
             (212) 403-1000                               5700
                                --------------
   Approximate date of commencement of proposed sale to the public: As soon as
practicable after the effective date of this Registration Statement and upon
the earlier to occur of the effective time of the merger (the "Merger") of the
wholly owned subsidiary of the Registrant with Hach Company ("Hach"), which
shall occur as soon as practicable after the satisfaction or waiver of all
conditions to the closing of the Merger, or the issuance of shares in exchange
for the assets of C&K Enterprises, Ltd. ("C&K"), which shall occur as soon as
practicable after the satisfaction of all conditions to closing of the
reorganization of C&K (the "C&K Reorganization").
                                --------------
   If the securities being registered on this form are being offered in
connection with the formation of a holding company and there is compliance with
General Instruction G, check the following box. [_]
   If this form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, check the following box and
list the Securities Act registration statement number of the earlier effective
registration statement for the same offering. [_]
   If this form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]
                                --------------
                        CALCULATION OF REGISTRATION FEE
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                            Amount       Proposed Maximum  Proposed Maximum
        Title of each Class of               to be        Offering Price       Aggregate          Amount of
     Securities to be Registered         Registered(1)       Per Share     Offering Price(2) Registration Fee(3)
- ----------------------------------------------------------------------------------------------------------------
<S>                                    <C>               <C>               <C>               <C>
Common Stock, $0.01 par value........      6,813,402      Not applicable    $389,900,068.69        $37,616
</TABLE>
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
(1) Represents the number of shares of Common Stock of the Registrant that may
    be issued to former stockholders of Hach pursuant to the Merger, giving
    effect to the exercise of outstanding options or other rights to purchase
    Hach Common Stock and Hach Class A Common Stock outstanding, and to former
    stockholders of C&K pursuant to the C&K Reorganization, assuming, in each
    case, an exchange ratio of 0.2987 of a share of Common Stock of the
    Registrant for each share of Hach Common Stock and Hach Class A Common
    Stock pursuant to the Merger and the C&K Reorganization (including certain
    shares that may be resold as described herein).
(2) Estimated solely for the purpose of calculating the registration fee
    pursuant to Rule 457(f)(1) and Rule 457(c) of the Securities Act based on
    the average of the high and low sale prices of Hach Common Stock of $17 1/8
    and the average of the high and low sale prices of Hach Class A Common
    Stock of $17 1/16, as reported on the Nasdaq National Market System on May
    27, 1999.
(3) Pursuant to Rule 457(b) of the Securities Act, the total registration fee
    of $108,393 was reduced in amount by $70,777, the filing fee paid by Hach
    pursuant to Exchange Act Rule 0-11 in connection with the filing of the
    preliminary information statement materials of Hach with the Securities and
    Exchange Commission on May 11, 1999.
  The Registrant hereby amends this Registration Statement on such date or
dates as may be necessary to delay its effective date until the Registrant
shall file a further amendment which specifically states that this Registration
Statement shall thereafter become effective in accordance with Section 8(a) of
the Securities Act of 1933, as amended, or until this Registration Statement
shall become effective on such date as the Commission, acting pursuant to said
Section 8(a), may determine.

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>

                                  HACH COMPANY

                             INFORMATION STATEMENT

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

                              DANAHER CORPORATION

                                   PROSPECTUS

   We are sending you this information statement/prospectus to describe the
proposed merger between Hach Company and a wholly owned subsidiary of Danaher
Corporation. When we complete this merger, Hach will become a subsidiary of
Danaher, and you will exchange your shares of Hach common stock and Hach Class
A common stock for shares of Danaher common stock. You will receive .2987 of a
share of Danaher common stock for each of your shares of Hach common stock and
Hach Class A common stock, subject to adjustment in certain circumstances. We
will round the total number of shares of Danaher common stock you receive down
to the nearest whole number of shares, and you will receive a cash payment for
any remaining fraction.

   Hach's controlling stockholders, Kathryn C. Hach-Darrow and Bruce J. Hach,
have already approved the merger by signing a written consent of stockholders.
No further vote of Hach stockholders is necessary to approve and adopt the
merger agreement and the merger. We are not asking you for a proxy and you are
requested not to send us a proxy. As we explain in this information
statement/prospectus, however, completion of the merger is still subject to
satisfaction or waiver of a number of conditions, including various regulatory
approvals. We cannot predict with certainty when we will complete the merger,
but we hope to complete it in the second or third quarter of 1999.

   This information statement/prospectus is also Danaher's prospectus for the
shares of Danaher common stock that it will issue to Hach stockholders in the
merger and pursuant to related transactions. Danaher will list the shares of
its common stock to be issued in this merger on the New York Stock Exchange.

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

    Neither the Securities and Exchange Commission nor any state securities
commission has approved of the merger or the securities to be issued under this
       information statement/prospectus or determined if the information
    statement/prospectus is accurate or adequate. Any representation to the
                        contrary is a criminal offense.

   This information statement/prospectus is dated June 3, 1999, and was first
            mailed to stockholders of Hach on or about June 7, 1999.
<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                           Page
                                                                           ----
<S>                                                                        <C>
QUESTIONS AND ANSWERS ABOUT THE MERGER....................................   1

SUMMARY...................................................................   3
  The Companies...........................................................   3
  The Controlling Stockholders............................................   3
  Reasons for the Merger..................................................   4
  No Further Stockholder Approval Required; Hach Board Approval...........   4
  Fairness Opinion........................................................   4
  The Merger..............................................................   4
    The Merger Agreement..................................................   4
    What You Will Receive in the Merger...................................   4
    Conditions to the Merger..............................................   5
    Regulatory Approvals..................................................   5
    Certain Federal Income Tax Consequences...............................   5
    Accounting Treatment..................................................   6
    Termination...........................................................   6
    Effects of the Merger on the Rights of Hach Stockholders..............   6
    Interests of Officers, Directors and the Controlling Stockholders in
     the Merger...........................................................   6
  No Dissenters' Rights...................................................   7

SUMMARY HISTORICAL AND UNAUDITED PRO FORMA FINANCIAL INFORMATION..........   8
  Hach Summary Historical Financial Information...........................   8
  Danaher Summary Historical Financial Information........................   9
  Selected Unaudited Pro Forma Combined Summary Financial Information.....  10
  Comparative Per Share Data..............................................  11
  Market Price and Dividend Data..........................................  12

CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING STATEMENTS................  13

THE MERGER................................................................  14
  General.................................................................  14
  Background of the Merger................................................  15
  Hach's Reasons for the Merger; Recommendation of the Hach Board.........  16
  Danaher's Reasons for the Merger........................................  18
  Opinion of the Investment Banker for the Hach Board.....................  18
    Historical Hach Stock Price Review....................................  19
    Public Market Valuation...............................................  20
    Selected Transactions Analysis........................................  21
    Discounted Cash Flow Analysis.........................................  21
    Pro Forma Contribution Analysis.......................................  21
    Pro Forma Merger Analysis.............................................  22
    Other Analyses........................................................  22
    Special Considerations................................................  22
    Fee Calculation.......................................................  22
  Interests of Certain Persons in the Merger..............................  23
    Ownership and Voting Stock............................................  23
    Hach Non-Employee Directors' Bonus Compensation Plan..................  23
    Hach Employment Agreements............................................  23
  Effective Time of the Merger............................................  25
  Certificate of Incorporation and Bylaws.................................  25
  Certain Federal Income Tax Consequences.................................  25
</TABLE>

                                       i
<PAGE>

<TABLE>
<CAPTION>
                                                                           Page
                                                                           ----
<S>                                                                        <C>
  Accounting Treatment....................................................  26
  Regulatory Approvals....................................................  27
  Listing of Shares of Danaher Common Stock on the NYSE...................  27
  Resale of Shares of Danaher Common Stock Issued in the Merger;
   Affiliates.............................................................  28
  No Appraisal Rights.....................................................  28

THE MERGER AGREEMENT......................................................  29
  The Merger..............................................................  29
  Consideration To Be Received In The Merger; Exchange Ratio..............  29
    Treatment of Hach Stock Held by Hach, Danaher and Merger Sub..........  29
  Procedures For Surrender Of Hach Certificates; Fractional Shares........  29
    Surrender of Hach Certificates........................................  29
    Fractional Shares.....................................................  30
  Representations And Warranties..........................................  30
  Covenants...............................................................  31
    Conduct of Business...................................................  31
    No Solicitation.......................................................  32
    Benefit Plans and Employee Matters in General.........................  32
    Hach Stock Options....................................................  32
    Hach Deferred Compensation Plan.......................................  33
    Hach Employee Stock Purchase Plan.....................................  33
    Insurance and Indemnification.........................................  33
    Fees and Expenses.....................................................  33
    Tax Treatment.........................................................  33
    Accounting Treatment..................................................  33
    Public Announcements..................................................  33
    All Reasonable Efforts................................................  34
    Additional Covenants..................................................  34
  Conditions..............................................................  34
  Termination.............................................................  35
  Amendments..............................................................  36
  Extension; Waiver.......................................................  36

OTHER AGREEMENTS..........................................................  37
  Stockholders Support Agreement..........................................  37
    Agreement to Support Transaction......................................  37
    Covenant Not to Compete...............................................  38
    Covenant Not to Solicit...............................................  38
  Registration Rights Agreement...........................................  38
  Agreement and Plan of Reorganization....................................  38
COMPARISON OF STOCKHOLDER RIGHTS..........................................  40
  Summary of Material Differences Between Current Rights of Hach
   Stockholders and Rights Those Stockholders Will Have as Danaher
   Stockholders Following the Merger......................................  40

UNAUDITED PRO FORMA COMBINED FINANCIAL INFORMATION........................  46

UNAUDITED PRO FORMA COMBINED BALANCE SHEET................................  46

UNAUDITED PRO FORMA COMBINED STATEMENTS OF EARNINGS.......................  47
  Notes to Pro Forma Combined Financial Information (Unaudited)...........  49

EXPERTS...................................................................  50

LEGAL MATTERS.............................................................  50

WHERE YOU CAN FIND MORE INFORMATION.......................................  50
</TABLE>

                                       ii
<PAGE>

                                                                          Page
                                                                          ----

                                   APPENDICES


 APPENDIX A  -- Agreement and Plan of Merger, dated as of April 21, 1999,
                among Danaher, Merger Sub and Hach........................  A-1

 APPENDIX B  -- Stockholders Support Agreement, dated as of April 21,
                1999, by and among Danaher, on the one hand, and Kathryn
                C. Hach-Darrow and Bruce J. Hach, on the other hand.......  B-1

 APPENDIX C  -- Written Consent of Controlling Stockholders of Hach dated
                April 21, 1999............................................  C-1

 APPENDIX D  -- Form of Registration Rights Agreement between Danaher and
                Kathryn C. Hach-Darrow....................................  D-1

 APPENDIX E  -- Agreement and Plan of Reorganization, dated as of April
                21, 1999, among Danaher, C&K Enterprises, Ltd., and
                Kathryn C. Hach-Darrow and Bruce J. Hach..................  E-1

 APPENDIX F  -- Opinion of Lazard Freres & Co. LLC........................  F-1

                                      iii
<PAGE>

   This document incorporates important business and financial information
about Hach and Danaher that is neither included in nor delivered with this
document. Hach will provide you with copies of this information, without
charge, upon written or oral request to:

   Hach Company
   5600 Lindbergh Drive
   Loveland, Colorado 80538
   Tel.: (970) 669-3050
   Attention: Chief Financial Officer
   website: http://www.hach.com

   Danaher will provide you with copies of this information relating to
Danaher, without charge, upon written or oral request to:

   Danaher Corporation
   1250 24th Street, N.W.
   Washington, D.C. 20037
   Telephone: (202) 828-0850
   Attention: Corporate Secretary
   Website: http://www.danaher.com

   In order to receive timely delivery of the documents, you should make your
request no later than June 25, 1999.

                                       iv
<PAGE>

                    QUESTIONS AND ANSWERS ABOUT THE MERGER

Q. What is the proposed transaction?

A. Hach will merge with a subsidiary of Danaher. As a result, Hach will become
   a wholly owned subsidiary of Danaher, and Hach stockholders will exchange
   their shares of Hach common stock and Hach Class A common stock for shares
   of Danaher common stock.

Q. What will I receive in the merger?

A. Each share of Hach common stock and Hach Class A common stock that you own
   will be exchanged for .2987 of a share of Danaher common stock, subject to
   adjustment as described below. You will receive a cash payment in place of
   any fractional share of Danaher common stock you would have otherwise
   received.

   For example, if you own 60 shares of Hach common stock and 40 shares of
   Hach Class A common stock, you will receive 29 shares of Danaher common
   stock plus cash equal to the market value of eighty-seven one hundredths of
   a share of Danaher common stock at the time of the merger (about $53.29
   based on Danaher's closing price of $61.25 on June 2, 1999). If you own
   5,000 shares of Hach common stock and 5,000 shares of Hach Class A common
   stock, you will receive 2,987 shares of Danaher common stock and no cash
   payment. The total value of the shares of Danaher common stock Danaher will
   issue in this transaction, based on the closing price per share of Danaher
   common stock of $61.25 on June 2, 1999, is about $417 million.

Q. Will the exchange ratio change between now and the time the merger is
   completed?

A. The .2987 exchange ratio may change. It will stay the same if the price of
   Danaher common stock measured shortly before the closing of the merger
   stays between $57.09 and $73.41.

   If the Danaher stock price falls below $57.09 (so that the value of Danaher
   common stock you would receive per share of Hach stock you hold falls below
   $17.05), then Hach may elect to terminate the merger agreement. If Hach
   does so elect, Danaher may prevent such a termination of the merger
   agreement by increasing the exchange ratio to provide you with
   approximately $17.05 in value of Danaher common stock per share of Hach
   stock you hold.

   If the Danaher stock price is above $73.41 (so that the value of Danaher
   common stock you would receive per share of Hach stock you hold is above
   $21.93), then Danaher may elect to terminate the merger agreement. If
   Danaher does so elect, Hach may prevent such a termination of the merger
   agreement by decreasing the exchange ratio to provide you with
   approximately $21.93 in value of Danaher common stock per share of Hach
   stock you hold.

   You can obtain current information on the exchange ratio by calling toll-
   free 1-800-568- 3476.

Q. Will the value of the transaction change between now and the time the
   merger is completed?

A. In all likelihood it will. The value of the transaction may fluctuate
   between the date of this information statement/prospectus and the
   completion of the merger, based upon the market price for Danaher common
   stock. In the merger you will receive a fraction of a share of Danaher
   common stock that (within the limits described above) is fixed but may
   change depending on the price of Danaher common stock. Any fluctuation in
   the market price of Danaher common stock will change the value of the
   shares of Danaher common stock that you will receive.

Q. Why is there no stockholder vote?

A. Immediately after Danaher, Hach and the merger subsidiary signed the merger
   agreement, Kathryn C. Hach-Darrow and Bruce J. Hach, as controlling
   stockholders, gave their written consent to the merger. At that time Mrs.
   Hach-Darrow and Mr. Hach held and had voting power over approximately 53%
   of the outstanding Hach common stock and approximately 55% of the
   outstanding Hach Class A common stock, which represented

                                       1
<PAGE>

   approximately 53% of the outstanding Hach stock entitled to vote on the
   merger. Their written consent to the merger met the stockholder approval
   requirements for the merger under Delaware law, the Hach restated
   certificate of incorporation and Hach bylaws, so no additional stockholder
   vote is necessary.

Q. What will the controlling stockholders receive in the merger and what will
   they be required to do?

A. Even though the controlling stockholders held a majority of shares of Hach
   common stock and Hach Class A common stock at the time of the stockholder
   action by written consent, they will not receive a control premium but will
   exchange their shares of Hach stock for Danaher shares at the same .2987
   exchange ratio as all other Hach stockholders.

   In a stockholders support agreement entered into at the same time as the
   merger agreement, the controlling stockholders agreed to vote to approve
   and adopt the merger agreement and the merger, to take additional action in
   furtherance of the merger, and to abide by certain restrictions on their
   future activities with respect to Hach's businesses set forth in that
   agreement.

   Mrs. Hach-Darrow also agreed to a form of registration rights agreement
   with Danaher, which will provide her with rights to have the shares of
   Danaher common stock she will receive in the merger registered for sale
   under the securities laws, so that the shares of Danaher common stock she
   receives in the merger will be as freely tradable as the shares received by
   other former Hach stockholders.

   Pursuant to an agreement and plan of reorganization, Danaher, C&K
   Enterprises, Ltd., a corporation whose only assets are shares of Hach
   stock, and the controlling stockholders of C&K (who are Kathryn C. Hach-
   Darrow and Bruce J. Hach), agreed that C&K will exchange its shares of Hach
   stock for shares of Danaher common stock immediately before completion of
   the merger. In that exchange, C&K will receive the same consideration that
   the other Hach stockholders will receive in the merger.

   Please see pages 37 through 39 for more information concerning these
   agreements.

Q. Am I entitled to appraisal rights?

A. No. Under Delaware law, which governs the merger, you are not entitled to
   appraisal rights.

Q. What do I need to do now?

A. Nothing. After the merger is completed, you will receive written
   instructions and a letter of transmittal for exchanging your shares of Hach
   common stock and Hach Class A common stock for shares of Danaher common
   stock and receiving your cash payment in place of any fraction of a share
   of Danaher common stock. Please do not send your share certificates until
   you receive the instructions and letter of transmittal.

Q. Should I send in my stock certificates now?

A. No. As soon as practicable after the merger is completed, Danaher will send
   Hach stockholders written instructions for exchanging their share
   certificates, together with a letter of transmittal for such certificates.

Q. When do you expect to complete the merger?

A. We are working toward completing the merger as quickly as possible. We must
   still obtain certain regulatory approvals before we can close, but we hope
   to complete the merger in the second or third quarter of this year.
   However, delays in obtaining regulatory approvals could delay the merger.

Q. Where can I find more information about Danaher and Hach?

A. More information about Danaher and Hach is available from various sources
   described under "Where You Can Find More Information" on page 50 of this
   information statement/prospectus.

Q. Who can help answer my questions?

   If you have more questions about the merger, you should contact:

                                 Hach Company
                             5600 Lindbergh Drive
                           Loveland, Colorado 80538
                             Tel.: (970) 669-3050
                      Attention: Chief Financial Officer
                         website: http://www.hach.com

   To obtain Danaher common stock quotations and the exchange ratio, call toll
   free 1-800-568-3476.

                                       2
<PAGE>

                                    SUMMARY

   This summary highlights selected information from this document and may not
contain all of the information that is important to you. To better understand
the merger and for a more complete description of the legal terms of the
merger, you should read carefully this entire document and the documents to
which we have referred you.

                                 The Companies

HACH COMPANY

Hach Corporation
5600 Lindbergh Drive
Loveland, Colorado 80538
Telephone: (970) 669-3050
Attention: Chief Financial Officer
website: http://www.hach.com

   Hach, a Delaware corporation, is engaged in the manufacture and distribution
of laboratory instruments, process analyzers, test kits, test strips and
analytical reagents which are used to analyze the chemical content and other
properties of water and other aqueous solution.

DANAHER CORPORATION

1250 24th Street, N.W.
Washington, D.C. 20037
Telephone: (202) 828-0850
Attention: Corporate Secretary
Website: http://www.danaher.com

   Danaher, a Delaware corporation, conducts its operations through two
business segments. The process/environmental controls segment is comprised of
the Fluke Corporation, Veeder-Root Company, Danaher Controls, Partlow/West,
Anderson Instruments, West Instruments, QualiTROL Corporation, A.L. Hyde
Company, Hengstler, McCrometer, the controls product line business units of
Joslyn Corporation and Pacific Scientific Company, Namco Controls, Dolan-
Jenner, M&M Precision Systems, Communications Technology Corporation, Gems
Sensors and Dr. Bruno Lange GmbH. These companies produce and sell compact,
professional electronic test tools, underground storage tank leak detection
systems and motion, position, speed, temperature, level and position
instruments and sensing devices, power switches and controls, communication
line products, power protection products, liquid flow and quality measuring
devices, quality assurance products and systems, safety devices and electronic
and mechanical counting and controlling devices.

   Danaher's other segment--tools and components--is comprised of the Danaher
Hand Tool Group (including Special Markets, Professional Tool Division and
Asian Tool Division), Matco Tools, Jacobs Chuck Manufacturing Company, Delta
Consolidated Industries, Jacobs Vehicle Systems Company, Hennessy Industries
and the hardware and electrical apparatus lines of Joslyn Manufacturing
Company. This segment is one of the largest domestic producers and distributors
of general purpose mechanics' hand tools and automotive specialty tools. Other
products manufactured by these companies include tool boxes and storage
devices, diesel engine retarders, wheel service equipment, drill chucks, custom
designed headed tools and components, hardware and components for the power
generation and transmission industries, high quality precision socket screws,
fasteners, and high quality miniature precision parts.

H2O ACQUISITION CORP.

c/o Danaher Corporation
1250 24th Street, N.W.
Washington, D.C. 20037
Telephone: (202) 828-0850
Attention: Corporate Secretary

   H2O Acquisition Corp. is a Delaware corporation and a wholly owned
subsidiary of Danaher formed solely for the purpose of effecting the merger
with Hach.

                          The Controlling Stockholders

   Kathryn C. Hach-Darrow is the chairman of Hach. Bruce J. Hach is the
president and chief executive officer of Hach. As of April 21, 1999, the date
that Mrs. Hach-Darrow and Mr. Hach signed and delivered the written consent of
Hach stockholders approving and adopting the merger

                                       3
<PAGE>

agreement and the merger to Hach, they had voting power over approximately 53%
of the outstanding Hach common stock and held approximately 55% of the
outstanding Hach Class A common stock.

                             Reasons for the Merger

   The Board of Directors of Hach believes that the merger provides Hach
stockholders with an investment in a larger and more diversified enterprise
that is well positioned to take advantage of new opportunities and to meet
competitive challenges in a manner that will enhance stockholder value for Hach
stockholders for various reasons, including the following:

  .  The merger is expected to provide Hach stockholders with shares of
     Danaher common stock in a tax-free exchange at a significant premium
     over the market price for shares of Hach common stock and Hach Class A
     common stock prior to the public announcement of the merger agreement.

  .  The merger will provide Hach stockholders who desire more liquidity for
     their investment with access to the more active trading market for
     shares of Danaher common stock.

  .  The merger will allow those Hach stockholders who wish to continue their
     investment in the water analysis industry to do so through their
     holdings of Danaher common stock.

   The Board of Directors of Danaher believes that the merger is in the best
interest of Danaher and its stockholders. Danaher expects to benefit from
Hach's products, market presence and people. Danaher believes that the addition
of Hach will enable Danaher to expand its product line, thereby creating
positive prospects for both stockholder value enhancement and improved customer
satisfaction in the future.

   Please note that achieving these benefits is subject to important factors
that could affect the future results of Hach and Danaher. For a discussion of
these factors, please see "Cautionary Statement Concerning Forward-Looking
Statements" on page 13.

         No Further Stockholder Approval Required; Hach Board Approval

   We are not asking you to vote on the merger. On April 21, 1999, the
controlling stockholders, who on that date together held about 53% of Hach's
voting power, voted by written consent to approve and adopt the merger
agreement and the merger. Their vote was sufficient for stockholder approval
and adoption of the merger agreement and the merger under Delaware law, the
Hach restated certificate of incorporation and the Hach bylaws.

   The Hach Board believes that the merger is advisable and fair and in the
best interest of Hach and Hach's stockholders. The Hach Board has unanimously
approved and adopted the merger agreement and the merger.

                                Fairness Opinion

   Lazard Freres & Co. LLC, Hach's investment banker, has given a written
fairness opinion to the Hach Board to the effect that the exchange ratio is
fair to Hach's stockholders, taken as a whole, from a financial point of view.
This opinion is subject to the qualifications and limitations referred to in
the opinion.

   We have attached a copy of Lazard's fairness opinion as Appendix F to this
information statement/prospectus. We encourage you to read this opinion.

                                   The Merger

The Merger Agreement. (See page 29)

   The merger agreement is the legal document that governs the merger. It is
attached as Appendix A to this information statement/prospectus, and we
encourage you to read it carefully.

What You Will Receive in the Merger. (See page 29)

   Each share of Hach common stock and Hach Class A common stock that you own
will be converted into a fraction of a share of Danaher common stock. This
fraction will be .2987 as long as the average daily last sale price of Danaher
common stock for the 15 consecutive trading days ending on the date the last of
the mutual conditions

                                       4
<PAGE>

to the merger agreement is satisfied or waived (which is referred to as the
average Danaher stock price) is between $57.09 and $73.41.

  .  If the average Danaher stock price falls below $57.09, such that the
     value of Danaher common stock you would receive per share of Hach stock
     falls below $17.05, then Hach may elect to terminate the merger
     agreement. If Hach does so elect, Danaher may prevent such a termination
     of the merger agreement by increasing the exchange ratio to provide you
     with $17.05 in value of Danaher common stock per share of Hach stock,
     based upon the average Danaher stock price.

  .  If the average Danaher stock price is above $73.41, such that the value
     of Danaher common stock you would receive per share of Hach stock is
     above $21.93, then Danaher may elect to terminate the merger agreement.
     If Danaher does so elect, Hach may prevent such a termination of the
     merger agreement by decreasing the exchange ratio to provide you with
     $21.93 in value of Danaher common stock per share of Hach stock, based
     upon the average Danaher stock price.

Conditions to the Merger. (See page 34)

   The completion of the merger depends upon meeting a number of conditions,
including:

  .  approval for listing on the NYSE of shares of Danaher common stock
     issuable in the merger;

  .  no pending litigation by a governmental entity which seeks to enjoin or
     prohibit completion of the merger, and no effective injunction, order or
     legal restraint preventing the completion of the merger;

  .  expiration or termination of the applicable waiting period under the
     Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended;

  .  other regulatory approvals and consents;

  .  receipt of legal opinions about certain tax consequences of the merger;

  .  receipt of an opinion from Danaher's independent auditor to the effect
     that the merger will be required to be accounted for as a pooling-of-
     interests;

  .  representations and warranties of each of Danaher and Hach contained in
     the merger agreement remaining true and correct at the closing except
     for such failures to be true and correct as could not, individually or
     in the aggregate, reasonably be expected to have a material adverse
     effect on the party whose representations and warranties are not true
     and correct; and

  .  each of Danaher and Hach having complied in all material respects with
     its covenants under the merger agreement.

   The Danaher merger will occur, and your shares of Hach common stock and Hach
Class A common stock will be exchanged for shares of Danaher common stock, no
later than two days after Hach and Danaher satisfy or waive all of the
conditions specified in the merger agreement.

Regulatory Approvals. (See page 27)

   Danaher and Hach are both required to make filings with or obtain approvals
from certain United States and international regulatory authorities in
connection with the merger, including United States antitrust authorities. The
waiting period during which the U.S. regulatory authorities review the merger
under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended,
will expire on June 6, 1999 unless extended by a request for additional
information or documentary materials. We believe that all other material
notifications, filings and approvals have been made or obtained, or will be
made or obtained prior to the date of the merger.

Certain Federal Income Tax Consequences. (See page 25)

   Danaher and Hach expect the merger to be tax free to Hach stockholders
(except for tax payable on cash received by Hach stockholders instead of
fractional shares of Danaher common stock). Hach and Danaher each must receive,
as a condition to the merger, an opinion of legal counsel that the merger will
qualify as a reorganization within the meaning of Section 368(a) of the
Internal Revenue Code, and Hach must receive, as a condition to the merger, an

                                       5
<PAGE>

opinion of legal counsel that neither Hach nor any of its stockholders will
recognize any gain or loss for federal income tax purposes as a result of the
merger or receipt of the merger consideration (except with respect to cash
paid instead of fractional shares).

Accounting Treatment. (See page 26)

   We expect that Danaher will account for the merger as a "pooling of
interests," which means that the book value of the assets, liabilities and
stockholders' equity of Hach will be carried over to the consolidated balance
sheet of Danaher, and no new goodwill will be created for Danaher. It is a
condition to the closing of the merger that Danaher receive a letter from
Danaher's independent auditor to the effect that the merger is required to be
accounted for as a pooling-of-interests. Hach must use its reasonable best
efforts to take any action, and to cure any prior action, that would prevent
the merger being accounted for as a pooling of interests, including the
issuance of certain shares of Hach common stock and Hach Class A common stock
from Hach's treasury.

Termination. (See page 35)

   The merger agreement may be terminated, and the merger abandoned, only in a
very limited number of circumstances, including, among other things, the
following:

  .  if the merger is not completed by October 31, 1999;

  .  if either Danaher or Hach breaches its representations, warranties,
     covenants or agreements such that the conditions to closing would not be
     able to be satisfied by October 31, 1999;

  .  if any governmental entity issues an order, decree or ruling or takes
     any action permanently enjoining or otherwise prohibiting the completion
     of the merger, and such order, ruling or other action has become final
     and nonappealable;

  .  if the parties agree to terminate the merger agreement; or

  .  if the average Danaher stock price is more than $73.41 or less than
     $57.09
     (such termination right being subject to the right of Danaher or Hach to
     prevent termination by adjusting the exchange ratio as described above).

Effects of the Merger on the Rights of Hach Stockholders. (See page 40)

   As a result of the merger, you will become a stockholder of Danaher.
Danaher is governed by Delaware corporate law, like Hach, and by its
certificate of incorporation and bylaws. Your rights under these provisions
will differ in certain respects from your rights as a stockholder of Hach.

Interests of Officers, Directors and the Controlling Stockholders in the
Merger. (See page 23)

   Hach executive officers, directors and controlling stockholders have
certain interests in the merger that include:

  .  accelerated vesting of stock options and distributions under certain
     benefit plans;

  .  employment arrangements and change of control agreements; and

  .  indemnification and directors' and officers' liability insurance
     policies.

   The executive officers and directors have stock options that will become
immediately exercisable as a result of the merger and will be converted under
the terms of the merger agreement into Danaher common shares. As of June 2,
1999, the executive officers and directors of Hach held stock options to
purchase an aggregate of 438,087 shares of Hach stock.

   Certain directors will also receive payments under a bonus compensation
plan of Hach that will terminate as a result of the merger.

   Danaher has also agreed to provide Kathryn Hach-Darrow with registration
rights with respect to the Danaher common stock she will receive in the
merger, in order to make the shares of Danaher common stock she receives in
the merger as freely tradable as the shares of Danaher common stock received
by other Hach stockholders in the merger. See page 38 for a description of
these rights.

                                       6
<PAGE>

   In assessing the fairness of the merger to stockholders of Hach, the Hach
Board took into account all of these interests. These interests are different
from and in addition to your interests as stockholders.

                             No Dissenters' Rights

   Delaware law does not provide for any dissenters' rights to an appraisal for
Hach stockholders in connection with the merger.

                                       7
<PAGE>

                        SUMMARY HISTORICAL AND UNAUDITED
                        PRO FORMA FINANCIAL INFORMATION

                 Hach Summary Historical Financial Information

   The summary historical financial information of Hach set forth below for
each of the years in the five-year period ended April 30, 1998 has been derived
from the historical financial statements of Hach. The summary historical
financial information for Hach for the three quarters ended January 30, 1999
and January 31, 1998 has been obtained from the unaudited financial statements
of Hach which, in the opinion of management of Hach, include all adjustments of
a normal and recurring nature that are necessary to present fairly the
information for such periods. Such financial information should be read in
conjunction with the financial statements of Hach and other financial
information incorporated by reference in this information statement/prospectus.

<TABLE>
<CAPTION>
                                  Fiscal Year Ended April 30,             Nine Months Ended
                          -------------------------------------------- -----------------------
                                                                       January 31, January 30,
                            1994     1995     1996     1997     1998      1998        1999
                          -------- -------- -------- -------- -------- ----------- -----------
                                         (in thousands, except per share data)
<S>                       <C>      <C>      <C>      <C>      <C>      <C>         <C>
Earnings Statement Data:
Net Revenues............  $100,369 $105,269 $114,285 $121,480 $128,058   $94,293    $103,258
Net Earnings before
 cumulative effect of
 change in accounting
 principles.............     9,060    9,270   11,254   12,495    9,100     8,675       8,815

Earnings per share
 before cumulative
 effect of change in
 accounting principles:
  Basic.................  $   0.40 $   0.41 $   0.50 $   0.55 $   0.52   $  0.48    $   0.51
  Diluted...............  $   0.40 $   0.41 $   0.50 $   0.55 $   0.51   $  0.48    $   0.51

Cash Dividends declared
 per share:
  Common................  $   0.07 $   0.09 $   0.11 $   0.12 $   0.12   $  0.09    $   0.09
  Class A...............  $   0.07 $   0.09 $   0.11 $   0.12 $   0.14   $  0.10    $   0.12

Balance Sheet Data:
Total Assets............    74,358   84,258   93,655  105,580  102,350    80,866     102,144
Total Debt..............        --       --       --       --   37,274    30,230      31,154
Stockholders' Equity....    62,497   71,328   78,820   87,289   39,819    34,007      48,958
</TABLE>
- --------
Note 1:  All share and per share amounts have been restated to give effect to
         adoption of SFAS No. 128 in the third quarter of the fiscal year 1998
         and the two-for-one stock split in October 1997.

                                       8
<PAGE>

                Danaher Summary Historical Financial Information

   The summary historical information of Danaher set forth below has been
derived from and should be read in conjunction with the audited financial
statements and other financial information incorporated by reference in this
information statement/prospectus.

<TABLE>
<CAPTION>
                                      Fiscal Year Ended December 31,             Three Months Ended
                          ------------------------------------------------------ -------------------
                             1994       1995       1996       1997       1998    03/27/98  04/02/99
                          ---------- ---------- ---------- ---------- ---------- --------- ---------
                                            (in thousands, except per share data)
<S>                       <C>        <C>        <C>        <C>        <C>        <C>       <C>
Earnings Statement Data:
Net Revenues............  $1,486,680 $1,899,463 $2,233,193 $2,492,002 $2,910,038 $ 646,240 $ 754,590
Net Earnings before
 cumulative effect of
 change in accounting
 principles:
  --Continuing
   Operations...........      86,404    128,289    154,357    176,606    182,946    44,203    55,159
  --Discontinued
     Operations.........       9,331      2,550     79,811         --         --        --        --
  --Total...............      95,735    130,839    234,168    176,606    182,946    44,203    55,159
Earnings per share
 before cumulative
 effect of change in
 accounting principles:
  --Continuing
   Operations
   Diluted..............  $     0.65 $     0.95 $     1.13 $     1.28 $     1.32 $    0.32 $    0.39
   Basic................  $     0.66 $     0.97 $     1.16 $     1.32 $     1.36 $    .033 $    0.41
  --Discontinued
   Operations
   Diluted..............  $     0.07 $     0.02 $     0.59 $     0.00 $     0.00 $    0.00 $    0.00
   Basic................  $     0.07 $     0.02 $     0.60 $     0.00 $     0.00 $    0.00 $    0.00
  --Total
   Diluted..............  $     0.72 $     0.96 $     1.72 $     1.28 $     1.32 $    0.32 $    0.39
   Basic................  $     0.73 $     0.99 $     1.76 $     1.32 $     1.36 $    .033 $    0.41
Cash Dividends declared
 per share..............  $    0.060 $    0.070 $    0.080 $    0.090 $    0.070 $   0.018 $   0.015
Book Value per Common
 Share..................  $     4.82 $     5.70 $     7.39 $     8.27 $     9.73 $    8.55 $    9.95

Balance Sheet Data:
Total Assets............   1,343,908  1,755,978  2,046,731  2,183,875  2,738,715 2,675,429 2,746,164
Total Debt..............     204,441    294,574    239,927    199,019    472,557   527,605   401,405
Shareholders' Equity....     636,684    772,874  1,005,733  1,139,219  1,351,831 1,182,503 1,391,436

Shares-Diluted..........     132,223    135,685    136,123    137,730    138,885   138,247   139,889
Shares-Basic............     130,847    132,772    132,950    133,999    134,745   134,032   135,638
</TABLE>

                                       9
<PAGE>

      Selected Unaudited Pro Forma Combined Summary Financial Information

   The selected unaudited pro forma combined summary financial information of
Danaher and Hach set forth below gives effect to the merger under the pooling-
of-interests accounting method and assumes that the merger had occurred at the
beginning of the earliest period presented. The pro forma information is
presented in accordance with Danaher's fiscal year, which ends December 31, and
Hach's balances for twelve-month periods ending approximately one month later
than the Danaher periods. The pro forma information is presented for
illustrative purposes only and is not necessarily indicative of the operating
results or financial position that would have occurred if the merger had been
consummated at such time, nor is it necessarily indicative of future operating
results or financial position. The unaudited pro forma combined summary
financial information should be read in conjunction with the "Unaudited Pro
Forma Combined Financial Information" included elsewhere in this information
statement/prospectus.

<TABLE>
<CAPTION>
                                                Fiscal Year Ended December 31,
                                               --------------------------------
                                                  1996       1997       1998
                                               ---------- ---------- ----------
                                               (in thousands, except per share
                                                            data)
<S>                                            <C>        <C>        <C>
Earnings Statement Data:
Net Revenues.................................. $2,352,249 $2,619,100 $3,047,061
Net Earnings
  --Continuing Operations.....................    166,511    188,576    192,186
  --Discontinued Operations...................     79,811         --         --
                                               ---------- ---------- ----------
  --Total..................................... $  246,322 $  188,576 $  192,186
                                               ========== ========== ==========

Earnings per share
  --Continuing Operations
    Diluted................................... $     1.17 $     1.31 $     1.33
    Basic..................................... $     1.19 $     1.35 $     1.37
  --Discontinued Operations
    Diluted................................... $     0.56         --         --
    Basic..................................... $     0.57         --         --
  --Total
    Diluted................................... $     1.72 $     1.31 $     1.33
    Basic..................................... $     1.76 $     1.35 $     1.37

Cash dividends declared per share............. $     0.10 $     0.10 $     0.09

Balance Sheet Data:
Total Assets..................................  2,148,888  2,264,741  2,840,859
Total Debt....................................    239,927    229,095    503,639
Shareholder's Equity..........................  1,091,258  1,173,226  1,400,789
Average Shares--Diluted.......................    142,914    143,479    143,987
Average Shares--Basic.........................    139,741    139,725    139,816
</TABLE>

                                       10
<PAGE>

                           Comparative Per Share Data

   Set forth below are earnings, cash dividends declared and book value per
share data for Danaher and Hach on both historical and pro forma combined bases
and on a per share equivalent pro forma basis for Hach. Pro forma combined
earnings per share are derived from the Unaudited Pro Forma Combined Financial
Information presented elsewhere in this information statement/prospectus, which
gives effect to the merger under the pooling-of-interests accounting method.
Book value per share for the pro forma combined presentation is based upon
outstanding shares of Danaher common stock, adjusted to include shares of
Danaher common stock to be issued in the merger for outstanding shares of Hach
common stock and Hach Class A common stock and outstanding Hach options at the
effective time of the merger. The per share equivalent pro forma combined data
for shares of Hach common stock and Hach Class A common stock is based on the
assumed conversion of each share of Hach common stock and Hach Class A common
stock into 0.2987 of a share of Danaher common stock. See "The Merger
Agreement--Terms of the Merger." The information set forth below should be read
in conjunction with the respective audited and unaudited financial statements
of Danaher and Hach incorporated by reference in this information
statement/prospectus and the "Unaudited Pro Forma Combined Financial
Information" and the notes thereto presented elsewhere herein. The pro forma
information is presented in accordance with Danaher's fiscal year, which ends
December 31, and Hach's balances for twelve-month periods ending approximately
one month later than the Danaher periods.

<TABLE>
<CAPTION>
                          At or for the Year Ended December 31,       Three Months Ended
                          -------------------------------------- ----------------------------
                              1996         1997         1998     March 27, 1998 April 2, 1999
Hach--Historical          ------------ ------------ ------------ -------------- -------------
Earnings per share:                      (in thousands, except per share data)
<S>                       <C>          <C>          <C>          <C>            <C>
 --Continuing Operations
 Diluted................  $       0.53 $       0.62 $       0.54
 Basic..................  $       0.53 $       0.62 $       0.54
 --Discontinued
  Operations
 Diluted................  $       0.00 $       0.00 $       0.00
 Basic..................  $       0.00 $       0.00 $       0.00
 --Total
 Diluted................  $       0.53 $       0.62 $       0.54
 Basic..................  $       0.53 $       0.62 $       0.54
Cash dividends declared
 per Hach common share..  $       0.12 $       0.12 $       0.12
Cash dividends declared
 per Hach Class A common
 share..................  $       0.12 $       0.13 $       0.16
Book value per Hach
 common share and Hach
 Class A common share...  $       3.76 $       1.77 $       2.87

Danaher--Historical
Earnings per share:
 --Continuing Operations
 Diluted................  $       1.13 $       1.28 $       1.32     $0.32          $0.39
 Basic..................  $       1.16 $       1.32 $       1.36     $0.33          $0.41
 --Discontinued
  Operations
 Diluted................  $       0.59 $       0.00 $       0.00     $0.00          $0.00
 Basic..................  $       0.60 $       0.00 $       0.00     $0.00          $0.00
 --Total
 Diluted................  $       1.72 $       1.28 $       1.32     $0.32          $0.39
 Basic..................  $       1.76 $       1.32 $       1.36     $0.33          $0.41
Cash dividends declared
 per Danaher common
 share..................  $       0.08 $       0.09 $       0.07     $0.02          $0.01
Book value per Danaher
 common share...........  $       7.39 $       8.27 $       9.73     $8.55          $9.95

Danaher & Hach--Pro
 Forma Combined
Earnings per share:
 --Continuing Operations
 Diluted................  $       1.17 $       1.31 $       1.33
 Basic..................  $       1.19 $       1.35 $       1.37
 --Discontinued
  Operations
 Diluted................  $       0.56 $       0.00 $       0.00
 Basic..................  $       0.57 $       0.00 $       0.00
 --Total
 Diluted................  $       1.72 $       1.31 $       1.33
 Basic..................  $       1.76 $       1.35 $       1.37
Cash dividends declared
 per common share.......  $       0.10 $       0.10 $       0.09
Book value per common
 share..................  $       7.64 $       8.18 $       9.73

Equivalent Pro Forma
 Combined Per Hach Share
Earnings per share:
 --Continuing Operations
 Diluted................  $       0.35 $       0.39 $       0.40
 Basic..................  $       0.35 $       0.40 $       0.41
 --Discontinued
  Operations
 Diluted................  $       0.17 $       0.00 $       0.00
 Basic..................  $       0.17 $       0.00 $       0.00
 --Total
 Diluted................  $       0.51 $       0.39 $       0.40
 Basic..................  $       0.53 $       0.40 $       0.41
Cash Dividends declared
 per common share.......  $       0.03 $       0.03 $       0.03
Book value per common
 share..................  $       2.28 $       2.44 $       2.91
</TABLE>

                                       11
<PAGE>

                         Market Price and Dividend Data

   The following table reflects (i) the range of the reported high and low last
sale prices of shares of Danaher common stock on the New York Stock Exchange,
Inc. Composite Tape and the per share dividends paid thereon and (ii) the range
of the reported high and low last sale prices of shares of Hach common stock
and Hach Class A common stock on the Nasdaq National Market tier of the Nasdaq
Stock Market (the "NASDAQ/NM") and the per share dividends paid thereon, in
each case for the calendar quarters indicated. The information in the table has
been adjusted to reflect retroactively all applicable stock splits.

<TABLE>
<CAPTION>
                                    Danaher                 Hach             Hach Class A
                                 Common Stock           Common Stock         Common Stock
                            ----------------------- --------------------- ------------------
                              High     Low    Div.    High    Low   Div.   High   Low   Div.
                            -------- -------- ----- -------- ------ ----- ------ ------ ----
   <S>                      <C>      <C>      <C>   <C>      <C>    <C>   <C>    <C>    <C>
   1997:
     First quarter......... 25       20 13/16 .0125 19 1/2   17 1/2   .06 --     --      --
     Second quarter........ 25 15/16 19 13/16 .0125 19 3/4   14 1/2   .06 --     --      --
     Third quarter......... 29 7/32  24 29/32 .0125 25       18 1/2   .06
     Fourth quarter........ 31 7/8   26 23/32 .0125 13 5/8   10 1/4   .03 12      9     .03
   1998:
     First quarter......... 38 3/32  29 1/2   .0125 12 3/4    9 1/4   .03  9 3/8  8     .04
     Second quarter........ 38 7/8   34 25/32 .0125 12 13/32  8 1/2   .03 10 7/8  8     .04
     Third quarter......... 45 3/4   30       .0125 14        9 3/4   .03 11 1/2  9 1/8 .04
     Fourth quarter........ 54 3/16  29 3/8   .015  12        9 7/8   .03 10 3/4  8 1/4 .04
   1999:
     First quarter......... 55       46 3/8   .015  12       10 3/4   .03 11      7 3/4 .04
     Second quarter
      (as of June 2,
      1999)................ 67 3/4   52 1/8         19       10       .03 18 3/8  7 3/8 .04
</TABLE>

   Danaher common stock is listed on the NYSE and the Pacific Exchange under
the symbol "DHR." On April 21, 1999, the last full trading day prior to the
announcement of the merger agreement, the closing price per share of Danaher
common stock was $62.3125, as reported on the NYSE Composite Tape. Hach common
stock and Hach Class A common stock are listed on the NASDAQ/NM under the
symbols "HACH" and "HACHA," respectively. The closing price per share of Hach
common stock was $10.50 and the closing price per share of Hach Class A common
stock was $7.375, as reported on the NASDAQ/NM. The value of a share of Hach
common stock and Hach Class A common stock at April 21, 1999, on an equivalent
per share basis, was $18.61 (assuming an exchange ratio of .2987). On June 2,
1999, the most recent practicable date prior to the mailing of this information
statement/prospectus, the closing prices of Danaher common stock, Hach common
stock and Hach Class A common stock were $61.25 per share, $17 per share and
$17 3/8 per share, respectively, as reported, in the case of Danaher common
stock, on the NYSE Composite Tape and, in the case of Hach stock, on the
NASDAQ/NM. Hach stockholders are encouraged to obtain current market quotations
for Danaher common stock, Hach common stock and Hach Class A common stock.

   Danaher will apply for the listing on the NYSE of the shares of Danaher
common stock to be issued in the merger.

   Hach has agreed in the merger agreement that it shall not declare or pay any
dividends other than Hach's regular quarterly cash dividends in amounts and
with record and payment dates in the ordinary course consistent with past
practice.

                                       12
<PAGE>

                        CAUTIONARY STATEMENT CONCERNING
                           FORWARD-LOOKING STATEMENTS

   Certain information included or incorporated by reference in this
information statement/prospectus may be deemed to be "forward looking
statements" within the meaning of Section 27A of the Securities Act and Section
21E of the Securities Exchange Act of 1934, as amended. All statements, other
than statements of historical facts, that address activities, events or
developments that Danaher or Hach intends, expects, projects, believes or
anticipates will or may occur in the future are forward looking statements.
Such statements are characterized by terminology such as "believe," "hope,"
"anticipate," "should," "intend," "plan," "will," "expects," "estimates,"
"projects," "positioned," "strategy," and similar expressions. These statements
are based on assumptions and assessments made by Danaher management or Hach
management in light of their experience and their perception of historical
trends, current conditions, expected future developments and other factors it
believes to be appropriate. These forward looking statements are subject to a
number of risks and uncertainties, including but not limited to:

  .  continuation of Danaher's or Hach's longstanding relationship with major
     customers;

  .  Danaher's ability to integrate Hach's or other acquired companies'
     businesses into its operations and realize planned synergies;

  .  the extent to which Hach's and other acquired companies' businesses are
     able to meet Danaher's expectations and operate profitably;

  .  changes in regulations (particularly environmental regulations) which
     could affect demand for Danaher's or Hach's products and unanticipated
     developments that could occur with respect to contingencies such as
     environmental matters and litigation.

   In addition, Danaher and Hach are subject to risks and uncertainties that
affect the manufacturing sector generally, including, but not limited to,
economic, competitive, governmental and technological factors affecting
Danaher's and Hach's operations, markets, products, services and prices. Any
such forward looking statements are not guarantees of future performances, and
actual results, developments and business decisions may differ from those
envisaged by such forward looking statements. Danaher and Hach disclaim any
duty to update any forward looking statements, all of which are expressly
qualified by the foregoing.

                                       13
<PAGE>

                                   THE MERGER

General

   We are furnishing this information statement/prospectus to you in connection
with the proposed merger of Hach with H\2\O Acquisition Corp., a Delaware
corporation and wholly owned subsidiary of Danaher formed for the purpose of
effecting the merger ("Merger Sub"), with Hach surviving the merger as a wholly
owned subsidiary of Danaher. This merger will be carried out as provided in the
Agreement and Plan of Merger, dated as of April 21, 1999, among Danaher, Merger
Sub and Hach. A copy of the merger agreement is attached as Appendix A to this
information statement/prospectus and is incorporated by reference in this
information statement/prospectus.

   This information statement/prospectus has been sent to you because on April
21, 1999, the record date for determining shareholders entitled to vote on the
merger agreement and the merger, you were a holder of either:

  .  Hach common stock, par value $1.00 per share, or

  .  Hach Class A common stock, par value $1.00 per share. In referring to
     both the Hach common stock and the Hach Class A common stock, we use the
     term "Hach stock."

   In the merger, each publicly outstanding share of Hach stock will be
converted into .2987 (the "Exchange Ratio") of a share of Danaher common stock,
par value $0.01 per share, subject to adjustment in certain circumstances. If
the shares of Danaher common stock that you would receive under the Exchange
Ratio includes a fraction of a share of Danaher common stock, Danaher will
instead pay you an amount in cash equal to that fractional interest rather than
give you a fractional share of Danaher common stock.

   This information statement/prospectus is to inform you of the merger. Your
vote is not required for the merger, because the controlling stockholders of
Hach, Kathryn C. Hach-Darrow and Bruce J. Hach, executed and delivered to Hach
on April 21, 1999 a written consent in lieu of a meeting of stockholders
approving and adopting the merger agreement and the merger. At the time the
controlling stockholders signed the written consent, they held of record, in
the aggregate, 4,785,340 shares of Hach common stock (entitled to one vote per
share) and 4,769,161 shares of Hach Class A common stock (not entitled to
vote). This means that the controlling stockholders represented the requisite
majority of the votes entitled to be cast at a meeting of Hach's stockholders
to consider the merger agreement and the merger. As a result, no meeting or
further approval or consent of stockholders of Hach is necessary to effect the
merger, unless the merger agreement is proposed to be amended in a manner that
under the Delaware General Corporation Law (the "DGCL") requires a vote of Hach
stockholders. The merger will become effective no earlier than 20 business days
after this information statement/prospectus is mailed to Hach stockholders, and
only after satisfaction or waiver of the conditions to the merger contained in
the merger agreement.

   This information statement/prospectus also constitutes a prospectus of
Danaher, which is a part of the Registration Statement on Form S-4 (the
"Registration Statement") filed by Danaher with the Securities and Exchange
Commission (the "Commission") under the Securities Act of 1933, as amended (the
"Securities Act"), in order to register the shares of Danaher common stock to
be issued to Hach stockholders both in the merger and pursuant to an Agreement
and Plan of Reorganization, dated as of April 21, 1999, among Danaher, C&K
Enterprises, Ltd., a Delaware corporation, and Mrs. Hach-Darrow and Mr. Hach,
as the controlling stockholders of C&K. See "Additional Agreements--Agreement
and Plan of Reorganization." The total aggregate amount of consideration to be
received by Hach's stockholders in the merger and pursuant to the
reorganization agreement, based on the closing price per share of Danaher
common stock on June 2, 1999 of $61.25, is approximately $417 million.

   To the extent that certain holders may be required to deliver a prospectus
in connection with the reoffering and resale of shares of Danaher common stock
issued in the merger in exchange for reissued tainted treasury shares of Hach
stock (as described under "--Accounting Treatment"), the Registration Statement
will also cover any such reoffering and resale. Specific information regarding
any such potential reoffering and resale transactions, the identity of the
selling stockholders and the number of shares that may be reoffered and resold
will be provided at the time of any such transaction in a prospectus supplement
included in a post-effective amendment to the Registration Statement.

                                       14
<PAGE>

Background of the Merger

   In December 1998, George Sherman, Chief Executive Officer and President of
Danaher, phoned Mrs. Hach-Darrow, Chairman of the Board of Hach, to request a
meeting. On January 6, 1999, Mr. Sherman met with Mrs. Hach-Darrow in Seattle,
Washington, where they had a preliminary discussion of Danaher's interest in
pursuing a merger involving Hach and Danaher. They agreed to and did meet again
in Seattle on January 19, 1999. Mrs. Hach-Darrow, Mr. Hach, Hach's President
and Chief Executive Officer, Gary R. Dreher, its Vice President and Chief
Financial Officer, Mr. Sherman and Patrick Allender, Danaher's Senior Vice
President and Chief Financial Officer, attended this meeting. Messrs. Sherman
and Allender outlined for Hach's management the strategic objectives, benefits
and strategies they believed would result from a merger involving Danaher and
Hach. This meeting concluded without any commitments being made by either
party.

   Following this meeting, Hach engaged Lazard Freres & Co. LLC as its
investment banker, and Hach informed Lazard of its prior discussions with
Danaher and requested Lazard to begin preparing an analysis of a possible
transaction with Danaher. On January 27, 1999, representatives of Lazard met
with Messrs. Hach and Dreher in Denver, Colorado to begin the due diligence
process.

   On February 2, 1999, Mrs. Hach-Darrow discussed with the Hach Board her and
Hach management's discussions with Mr. Sherman.

   At the regularly scheduled February 22, 1999 Hach Board meeting, following a
presentation on Danaher by Hach's management and Lazard, the Hach Board
authorized Hach's management and Lazard to proceed with exploratory discussions
with Danaher.

   On March 1, 1999, Messrs. Hach and Dreher and Robert O. Case, General
Counsel and Secretary of Hach, together with representatives of Lazard, met
with Messrs. Sherman and Allender in Northbrook, Illinois. They discussed the
Danaher operating and financial strategy in more detail and how Hach might fit
into this strategy. At the conclusion of the meeting, Mr. Sherman expressed
Danaher's preliminary interest in merging with Hach for consideration in the
range of $16.00-$16.50 per share of Hach stock payable in Danaher common stock.

   On March 3, 1999, the Hach Board met by telephone to review Danaher's
preliminary expression of interest in a merger with Hach. Hach management
updated the Board about discussions with Danaher as well as Hach's current
operating situation and the projected operating results for the next few years.
Lazard reviewed public information related to Danaher and made a preliminary
presentation to the Hach Board. The Hach Board authorized management and Lazard
to continue discussions with Danaher after the signing of a nondisclosure
agreement.

   On March 5, 1999, a nondisclosure agreement with a standstill provision was
executed, and the parties began the process of due diligence.

   On March 23, 1999, representatives of Hach and Danaher and their respective
investment bankers met in Chicago, Illinois where the representatives of Hach
presented Hach's business and financial plans.

   Between March 31, 1999 and April 7, 1999, Lazard met and held telephone
conversations on several occasions with Salomon Smith Barney Inc., Danaher's
financial advisors, to review and discuss the transaction. On April 8, 1999,
Danaher, through Salomon Smith Barney, proposed a merger price of $17.50 per
share of Hach stock.

   On April 9, 1999, Mrs. Hach-Darrow phoned Mr. Sherman directly, and they
agreed to continue discussions based on a price per share of Hach stock of
$18.50, subject to satisfactory negotiation of structural terms and to
authorization by the Danaher Board and the Hach Board.

   The Danaher Board on April 9, 1999 authorized certain officers of Danaher to
finalize and execute the merger agreement.

                                       15
<PAGE>

   During the week of April 12, 1999, the parties continued their respective
due diligence reviews, with Danaher representatives making on-site plant visits
and environmental reviews of the Hach facilities. The Hach and Danaher
diligence teams met on April 13, 1999, in Loveland, Colorado and on April 15,
1999, in Washington, D.C.

   Representatives of Danaher and Hach and their legal advisors and investment
bankers continued to meet during this period to discuss valuation and
transaction structure issues. An initial draft of the merger document and
related transaction documents was prepared by Danaher's counsel and first
circulated among the working group on April 13, 1999.

   On April 16, 1999, the Hach Board held a special meeting in Chicago,
Illinois and was informed that Danaher had proposed a transaction structured as
a merger of a subsidiary of Danaher into Hach with Hach shareholders receiving
Danaher common stock based on a fixed exchange ratio with a collar range, and
reciprocal walk-away rights if the market price of Danaher stock rises above or
falls below certain levels. The Hach Board received a preliminary briefing from
counsel and a preliminary evaluation report from Lazard. The Hach Board
authorized management and Lazard to negotiate the economic terms of a merger
within specified parameters and to continue with the negotiation of a merger
document.

   Between April 16 and April 21, 1999, representatives of Danaher and Hach, as
well as their respective counsels, negotiated and finalized the terms of the
merger agreement. Representatives of Danaher also negotiated the terms of a
stockholders support agreement and registration rights agreement during this
time with Mrs. Hach-Darrow and Mr. Hach. During this period, conversations
continued between Lazard and Salomon Smith Barney regarding the transaction
terms and structure. As a result of these discussions, on April 19, 1999,
Danaher agreed to an Exchange Ratio of 0.2987 (subject to a 12.5% collar with
reciprocal walk-away rights), subject to finalization of documentation and
approval of the Hach Board.

   On April 20, 1999, the Hach Board met by phone and reviewed the final terms
and conditions of the proposed transaction with Danaher. Legal counsel for Hach
advised the Hach Board on the final terms of the definitive agreements, the
results of the legal due diligence of Danaher, and the responsibilities of the
Hach Board. Lazard then made a financial presentation in respect of the
proposed merger and advised the Hach Board that assuming execution of the
merger agreement with terms consistent with those described during such
meeting, Lazard would be prepared to render its opinion (which written opinion
was subsequently delivered dated April 21, 1999) to the effect that, as of such
date and based upon and subject to certain matters stated in such opinion, the
Exchange Ratio was fair to the holders of Hach stock, taken as a whole, from a
financial point of view. See "--Opinion of the Investment Banker for the Hach
Board." The Hach Board also discussed the accounting treatment of the merger
with a representative of PricewaterhouseCoopers LLP, Hach's independent
accountant. After discussion, the Hach Board unanimously approved the terms of
the merger agreement presented to it, and directed the officers of Hach to
finalize and execute the merger agreement.

   The definitive merger agreement was finalized and executed on behalf of
Danaher, Hach and Merger Sub after the close of the stock market on April 21,
1999, along with a stockholders support agreement and a written consent of Hach
stockholders holding a majority of the Hach voting common stock. Danaher and
Hach publicly announced the merger before the commencement of business on April
22, 1999. A notice of action by written consent of stockholders was mailed to
all Hach stockholders on May 4, 1999, as required by Delaware law.

Hach's Reasons for the Merger; Recommendation of the Hach Board

   The Hach Board believes that the merger provides Hach stockholders with an
investment in a larger and more diversified enterprise that is well positioned
to take advantage of new opportunities and to meet competitive challenges in a
manner that will enhance stockholder value for Hach stockholders, for various
reasons, including the following:

  .  The merger is expected to provide Hach stockholders with shares of
     Danaher common stock in a tax-free exchange at the Exchange Ratio, which
     represents a significant premium over the market price for shares of
     Hach stock prior to the public announcement of the merger.


                                       16
<PAGE>

  .  The merger will provide those Hach stockholders who desire more
     liquidity for their investment with access to the more active trading
     market for Danaher common stock.

  .  The merger will allow those Hach stockholders who wish to continue their
     investment in the water analysis industry to do so through their
     holdings of Danaher common stock.

   The Hach Board made its determination after careful consideration of, and
based on, a number of factors, including, among other things, the reasons
described above and the following additional factors:

  .  its review of Hach's prospects of continuing as an independent company,
     including trading value and liquidity issues;

  .  its review of other strategic alternatives;

  .  the judgment, advice and analysis of Hach's senior management, including
     its favorable recommendation of the merger;

  .  presentations by and discussions with Hach's senior management, legal
     advisors and investment bankers, regarding the terms of the merger
     agreement and stockholders support agreement, including those provisions
     which preclude consideration of alternative transactions required by
     Danaher as a condition to its agreement to proceed;

  .  the fact that holders of Hach common stock and Hach Class A common stock
     will receive equal treatment in the merger, as required by the Hach
     certificate of incorporation and the absence of appraisal rights;

  .  the opinion of Lazard described below to the effect that, as of the date
     thereof and based upon and subject to the matters contained in the
     written fairness opinion, the Exchange Ratio in the merger is fair to
     Hach stockholders, taken as a whole, from a financial point of view;

  .  information concerning the financial and operating performance and
     condition, business operations, debt and capital levels, asset quality
     and prospects of Hach, Danaher and the combined company;

  .  current industry, economic and market conditions and trends, including
     the likelihood of continuing consolidation and increasing competition in
     the water analysis industry (and the corresponding decrease in the
     number of suitable merger partners);

  .  the importance of market position, significant scale and scope and
     financial resources to a company's ability to compete effectively in the
     changing environment in the water analysis industry;

  .  that the merger will be accomplished on a tax-free basis to stockholders
     of Hach for federal income tax purposes;

  .  the ability of the parties to complete the merger, including, in
     particular, the likelihood of obtaining regulatory approvals;

  .  the anticipated positive effects of the merger on long-term value for
     Hach stockholders through their ownership of stock in a stronger, more
     diversified company with greater liquidity in the market for its shares;
     and

  .  the belief that the corporate cultures of the two companies would be
     complementary.

   The Hach Board also considered a number of potential countervailing factors
in its deliberations concerning the merger, including:

  .  the possibility of management disruption associated with the merger and
     the risk that key technical and management personnel of Hach might not
     continue with Hach;

  .  the interests of Hach's management in the merger as described in
     "Interests of Certain Persons in the Merger";

                                       17
<PAGE>

  .  the possibility of a decline in the value of Danaher common stock; and

  .  the risk that the potential benefits of the merger might not be
     realized.

   In the view of the Hach Board, these potential countervailing factors did
not, individually or in the aggregate, outweigh the advantages of the merger.

   The above factors are not intended to be exhaustive but are believed to
include all material factors considered by the Hach Board. In reaching its
decision to approve the merger agreement and the merger and to recommend that
Hach stockholders vote to approve and adopt the merger agreement and the
merger, the Hach Board did not view any single factor as determinative and did
not find it necessary or practicable to assign any relative or specific weights
to the various factors considered. Furthermore, individual directors may have
given differing weights to different factors.

Danaher's Reasons for the Merger

   The Danaher Board believes that the merger is in the best interest of
Danaher and its stockholders. Danaher expects to benefit from Hach's products,
market presence and people. Danaher believes that the addition of Hach will
enable Danaher to expand its product line, thereby creating positive prospects
for both stockholder value enhancement and improved customer satisfaction in
the future.

Opinion of the Investment Banker for the Hach Board

   On April 21, 1999, Lazard delivered its written opinion to the Hach Board to
the effect that, based upon and subject to the matters set forth in its
opinion, as of April 21, 1999 the Exchange Ratio is fair to the holders of Hach
stock, taken as a whole, from a financial point of view.

   The full text of Lazard's written opinion, dated April 21, 1999, which sets
forth the assumptions made, matters considered and limits on the review
undertaken, is attached to this information statement/prospectus as Appendix F.
This summary description of the Lazard opinion is qualified in its entirety by
reference to the full text of the Lazard opinion. Hach stockholders are urged
to, and should, read the Lazard opinion in its entirety. The Lazard opinion is
addressed to the Hach Board and addresses only the fairness, from a financial
point of view, of the Exchange Ratio pursuant to the merger agreement. The
Lazard opinion does not address the merits of the underlying decision by Hach
to engage in the merger. The Lazard opinion does not constitute, and should not
be construed as, a recommendation to any stockholder of Hach as to how such
holder should vote to approve or consent to, or take any other action with
respect to, the merger and the transaction contemplated by the merger
agreement, if such vote were required in connection with the merger, and did
not constitute any such recommendation.

   In connection with rendering its opinion to the Hach Board, Lazard:

  .  reviewed the financial terms and conditions of the merger agreement;

  .  analyzed certain historical business and financial information relating
     to Hach and Danaher;

  .  reviewed various financial forecasts and other data provided to Lazard
     by Hach and Danaher relating to their respective businesses;

  .  participated in discussions with members of the senior management of
     Hach and Danaher with respect to the businesses and prospects of Hach
     and Danaher, respectively, and the strategic objectives of each;

  .  reviewed public information with respect to certain other companies in
     lines of businesses Lazard believed to be generally comparable to those
     of Hach and Danaher;

  .  reviewed the financial terms of certain business combinations involving
     companies in lines of businesses Lazard believed to be generally
     comparable to those of Hach and Danaher, and in other industries
     generally;

                                       18
<PAGE>

  .  reviewed the historical stock prices and trading volumes of shares of
     Hach stock and Danaher common stock; and

  .  conducted such other financial studies, analyses and investigations as
     it deemed appropriate.

   Lazard relied upon the accuracy and completeness of all information supplied
or otherwise made available to Lazard, discussed with or reviewed by or for
Lazard, or publicly available, and Lazard did not assume any responsibility for
any independent verification of such information or any independent valuation
or appraisal of any of the assets or liabilities of Hach or Danaher. In
addition, Lazard did not conduct any physical inspection of any of the
properties or facilities of Hach or Danaher. The Lazard opinion does not
constitute a valuation or appraisal of the shares of stock, assets or
liabilities of Hach or Danaher or the solvency or fair value of either. With
respect to the financial forecasts, Lazard assumed that they were reasonably
prepared on bases reflecting the best currently available estimates and
judgments of management of Hach and Danaher as to the future financial
performance of Hach and Danaher, respectively. Lazard assumed no responsibility
for and expressed no view as to such forecasts or the assumptions on which they
were based.

     The Lazard opinion was necessarily based on accounting standards,
economic, monetary, market and other conditions as in effect on, and the
information made available to Lazard as of, April 21, 1999. While subsequent
developments may affect Lazard's opinion, Lazard does not have any obligation
to update, to revise, or to reaffirm its opinion.

   In rendering its opinion, Lazard assumed that:

  .  the transaction contemplated by the merger agreement will be consummated
     on the terms described in the merger agreement, without any waiver of
     any of the material rights, terms or conditions thereof by Hach;

  .  obtaining any necessary regulatory approvals for the transaction will
     not have an adverse effect on Hach or Danaher; and

  .  the merger will qualify as a tax-free reorganization for United States
     federal income tax purposes and will be accounted for as a pooling-of-
     interests.

   Lazard was not authorized to, and did not, solicit third party indications
of interest or proposals with respect to a purchase of all or any part of Hach.
The Lazard opinion did not express an opinion as to the prices at which shares
of Hach stock or Danaher common stock may trade following the date of the
Lazard opinion.

   At a meeting of the Hach Board on April 20, 1999, Lazard presented certain
financial analysis, accompanied by written materials, in connection with the
Lazard opinion. The following is a summary of the material financial and
comparative analysis performed by Lazard in arriving at the Lazard opinion.

   Lazard indicated that the proposed exchange ratio of .2987 (which translated
into $19.19 per share of Hach Class A common stock and Hach common stock based
on the closing price of $64.25 per share of Danaher common stock on April 19,
1999, the day immediately preceding the Hach Board meeting) implied for Hach a
diluted equity value of $363 million and an enterprise value of $375 million,
which implied enterprise value to expected fiscal 1999 sales, EBITDA (earnings
before interest, taxes, depreciation and amortization) and EBIT (earnings
before interest and taxes) multiples of 2.62x, 13.0x and 17.5x, respectively,
and a price to expected fiscal 1999 EPS (earnings per share) multiple of 25.7x.
While Lazard's written presentation materials to the Hach Board referenced the
$19.19 figure, Lazard also discussed with the Hach Board various items during
its presentation based upon Danaher's closing price of $62.25 on April 20, 1999
(which translated into $18.59 per share of Hach Class A common stock and Hach
common stock at the proposed exchange ratio of .2987). Lazard indicated that at
the $18.59 figure, the proposed exchange ratio of .2987 implied for Hach a
diluted equity value of $352 million and an enterprise value of $363 million,
which implied enterprise value to expected fiscal 1999 sales, EBITDA and EBIT
multiples of 2.54x, 12.6x and 16.9x, respectively, and a price to expected
fiscal 1999 EPS multiple of 24.9x.

   Historical Hach Stock Price Review. Lazard reviewed information regarding
historical stock price performance for the Hach stock. Lazard noted that
between April 15, 1998 and April 19, 1999, the trading

                                       19
<PAGE>

range for the Hach common stock was from an intra-day low of $8.50 per share to
an intra-day high of $14.50 and the trading range for the Hach Class A common
stock was from an intra-day low of $7.75 per share to an intra-day high of
$11.50. Lazard noted that issues affecting the valuation of the Hach stock
include, among other things, lack of public float, limited liquidity and
institutional ownership, lack of equity research analyst coverage, and the
small size of Hach.

   Public Market Valuation. Lazard compared certain actual and estimated
financial, operating and stock market information for Hach and for a group of
publicly traded companies in lines of business which Lazard believed to be
reasonably comparable to those of Hach. Lazard believed that, although there
were no public companies with precisely the same mix of businesses and
financial condition as Hach, the most relevant comparable companies to Hach
were (collectively defined as the "Comparable Companies"):

  .  EG&G Incorporated;

  .  Ionics Incorporated;

  .  Osmonics Incorporated;

  .  Thermo Instrument Systems;

  .  VWR Scientific Products Corporation; and

  .  U.S. Filter Corporation (prior to its announced merger with Vivendi).

   Lazard's analysis indicated that the Comparable Companies' enterprise value
multiples of calendar year 1998 and 1999 financial information were as follows:

<TABLE>
<CAPTION>
                                                               Low  Median High
                                                              ----- ------ -----
     <S>                                                      <C>   <C>    <C>
     1998 sales.............................................. 0.76x 1.10x  1.48x
     1999 sales (estimated).................................. 0.85x 1.05x  1.45x
     1998 EBITDA.............................................  7.9x  8.8x  10.2x
     1999 EBITDA (estimated).................................  7.1x  7.8x   8.5x
     1998 EBIT............................................... 11.6x 12.5x  15.7x
     1999 EBIT (estimated)................................... 10.0x 11.3x  13.1x
</TABLE>

   Lazard's analysis indicated that the Comparable Companies' price to calendar
year estimated 1999 and 2000 EPS multiples were as follows:

<TABLE>
<CAPTION>
                                                               Low  Median High
                                                              ----- ------ -----
     <S>                                                      <C>   <C>    <C>
     1999 EPS (estimated).................................... 13.7x 16.8x  20.9x
     2000 EPS (estimated).................................... 11.8x 15.0x  17.6x
</TABLE>

   Lazard calculated the hypothetical trading values that Hach could attain
utilizing the calendar year 1998 and 1999 enterprise value multiples discussed
above applied to Hach's forecasted financial information for the fiscal years
ending April 30, 1999 and 2000. The hypothetical trading values of Hach stock
implied by multiples of the Comparable Companies' enterprise value applied to
Hach's estimated financial information for the fiscal years ending April 30,
1999 and 2000 were as follows:

<TABLE>
<CAPTION>
                                                           Low   Median   High
                                                         ------- ------- -------
     <S>                                                 <C>     <C>     <C>
     2000 EBITDA........................................ $ 10.78 $ 11.89 $ 12.96
     1999 EBITDA........................................ $ 11.36 $ 12.76 $ 14.96
     2000 EBIT.......................................... $ 11.40 $ 12.98 $ 15.11
     1999 EBIT.......................................... $ 12.52 $ 13.62 $ 17.24
</TABLE>

   In addition, Lazard calculated the hypothetical trading values that Hach
could attain utilizing the calendar year 1999 and 2000 price to EPS multiples
discussed above applied to Hach's forecasted financial information

                                       20
<PAGE>

for the fiscal years ending April 30, 2000 and 2001. The hypothetical trading
values of Hach Shares implied by the Comparable Companies' price to EPS
multiples applied to Hach's forecasted financial information for the fiscal
years ending April 30, 2000 and 2001 were as follows:

<TABLE>
<CAPTION>
                                                             Low   Median  High
                                                            ------ ------ ------
     <S>                                                    <C>    <C>    <C>
     2001 EPS.............................................. $11.31 $14.42 $16.90
     2000 EPS.............................................. $11.11 $13.59 $16.89
</TABLE>

   Selected Transactions Analysis. Lazard reviewed certain publicly available
information on announced merger and acquisition transactions of certain
businesses since September 1996 and reviewed in particular certain publicly
available information on sixteen transactions ("Comparable Transactions").
However, Lazard noted that the reasons for, and circumstances surrounding, each
of the transactions analyzed were diverse and the characteristics of the
companies involved were not exactly comparable to those of the merger.

   This analysis showed that the aggregate consideration paid in the Comparable
Transactions reviewed represented latest twelve months enterprise value
multiples as follows:

<TABLE>
<CAPTION>
                                                               Low  Median High
                                                              ----- ------ -----
     <S>                                                      <C>   <C>    <C>
     Sales................................................... 0.65x 1.52x  3.52x
     EBITDA..................................................  9.2x 11.6x  15.5x
     EBIT....................................................  9.5x 14.9x  26.9x
</TABLE>

   This analysis showed that the aggregate consideration paid in the Comparable
Transactions reviewed represented latest twelve months price to EPS multiples
as follows:

<TABLE>
<CAPTION>
                                                               Low  Median High
                                                              ----- ------ -----
     <S>                                                      <C>   <C>    <C>
     EPS..................................................... 13.6x 22.5x  44.2x
</TABLE>

   Lazard calculated the implied value per share of Hach stock utilizing the
multiples discussed above. The implied values per share of Hach stock implied
by the enterprise value multiples of the Comparable Transactions' target
companies applied to Hach's forecasted financial information for the fiscal
year ending April 30, 1999 were as follows:

<TABLE>
<CAPTION>
                                                             Low   Median  High
                                                            ------ ------ ------
     <S>                                                    <C>    <C>    <C>
     EBITDA................................................ $13.45 $17.07 $22.89
     EBIT.................................................. $10.20 $16.27 $29.90
</TABLE>

   The implied value per share of Hach stock implied by the price to EPS
multiples of the Comparable Transactions' target companies applied to Hach's
forecasted financial information for the fiscal year ending April 30, 1999 was
as follows:

<TABLE>
<CAPTION>
                                                             Low   Median  High
                                                            ------ ------ ------
     <S>                                                    <C>    <C>    <C>
     EPS................................................... $10.11 $16.81 $32.99
</TABLE>

   Discounted Cash Flow Analysis. Based upon the forecasts prepared by the
management of Hach, Lazard derived ranges of implied equity value per share
based upon the net present value of Hach for the fiscal years 2000 to 2004,
inclusive, and the projected fiscal 2004 terminal value based upon a range of
multiples of projected fiscal 2004 EBITDA. In conducting this analysis, Lazard
applied discount rates ranging from 11.0% to 13.0% and terminal multiples of
EBITDA ranging from 8.0x to 10.0x. Based on this analysis, Lazard calculated a
range of present values of $12.68 to $16.58 per share of Hach stock.

   Pro Forma Contribution Analysis. Lazard performed a contribution analysis
utilizing the Exchange Ratio of 0.2987 and closing price of Danaher common
stock on April 19, 1999 of $64.25 per share. The analysis demonstrated that
owners of Hach stock will have a pro forma diluted ownership of 4.5% of the
combined entity's pro forma diluted shares outstanding, with holders of Danaher
common stock having

                                       21
<PAGE>

ownership of the remaining 95.5%. In addition, based on calendar 1998 results,
Hach will contribute 5.5% and 5.6% of the combined entities EBITDA and net
income, respectively.

   Pro Forma Merger Analysis. Lazard analyzed the pro forma impact of the
consummation of the merger on the earnings per share of Danaher, and compared
such results to earnings per share on a stand-alone basis for Danaher. Such
analyses estimated that, utilizing the Exchange Ratio of 0.2987, projections
prepared by the management of Hach and Danaher, and closing price of Danaher
common stock on April 19, 1999 of $64.25, the merger would be accretive, with
or without expected synergies, to Danaher's earnings per share in 1999, 2000
and 2001, respectively.

   Other Analyses. Lazard indicated that based on the closing stock price of
Danaher common stock on April 19, 1999 of $64.25 per share, the Exchange Ratio
implied an 85.0% premium over the closing price per share of Hach common stock
and a 139.9% premium over the closing price per share of Hach Class A common
stock, in each case, on April 19, 1999, the day immediately preceding the Hach
Board meeting. Lazard further indicated that based on the closing price per
share of Danaher common stock on April 20, 1999 of $62.25 per share, the day of
the Hach Board meeting, the Exchange Ratio implied a 79.2% premium over the
closing price per share of Hach common stock and a 139.9% premium over the
closing price per share of Hach Class A common stock in each case, on April 20,
1999, the day of the Hach Board meeting.

   Special Considerations. The preparation of a fairness opinion is a complex
process and is not necessarily susceptible to partial analysis or summary
description. Selecting portions of the analyses or of the summary set forth
above without considering the analyses as a whole could create an incomplete or
misleading view of the process underlying the Lazard opinion. No company or
transaction used in the above analysis as a comparison is identical to Hach or
Danaher or the transaction contemplated by the merger agreement. The analyses
were prepared solely for purposes of Lazard providing its opinion that, as of
April 21, 1999, the Exchange Ratio is fair to the holders of Hach stock, taken
as a whole, from a financial point of view, and do not purport to be appraisals
or necessarily reflect the prices at which businesses or securities actually
may be sold, which may be significantly more or less favorable than as set
forth in these analyses. Similarly, any estimate of values or forecast of
future results contained in the analyses is not necessarily indicative of
actual values or actual future results, which may be significantly more or less
favorable than those suggested by such analyses.

   In performing its analyses, Lazard made numerous assumptions with respect to
industry performance, general business and economic conditions and other
matters. Such analyses are inherently subject to uncertainty, being based upon
numerous factors or events beyond the control of the parties or their
respective advisors or investment bankers. Future results or actual values may
be materially different from those forecasts or estimates contained in the
analyses. As described above, Lazard's opinion was one of several factors taken
into consideration by the Hach Board in making its determination to approve the
merger agreement. While Hach believes that the foregoing summary covers the
material aspects of the analyses performed by Lazard, the foregoing summary
does not purport to be a complete description of such analyses and is qualified
in its entirety by reference to the written opinion of Lazard set forth in
Appendix F.

   Lazard is an internationally recognized investment banking firm and is
continually engaged in the valuation of businesses and their securities in
connection with mergers and acquisitions, negotiated underwritings, secondary
distributions of listed and unlisted securities, private placements, leveraged
buyouts, and valuations for estate, corporate and other purposes. The Hach
Board selected Lazard to act as its investment banker because of Lazard's
expertise and its reputation in investment banking and mergers and
acquisitions.

   Fee Calculation. In connection with Lazard's services as investment banker
to Hach, Hach will pay Lazard a base fee in respect of the execution of the
merger agreement and will pay Lazard a fee equal to a customary percentage of
the transaction value upon the consummation of the merger. Hach has also agreed
to reimburse Lazard for its reasonable out-of-pocket expenses, including, but
not limited to, fees and expenses of its counsel. Hach has agreed to indemnify
Lazard and certain related parties against certain liabilities, including
liabilities arising under the federal securities laws.


                                       22
<PAGE>

Interests of Certain Persons in the Merger

   You should be aware of the interests that executive officers, directors and
controlling stockholders of Hach have in the merger. These interests are
different from and in addition to your and their interests as stockholders.
These include:

  .  accelerated vesting of stock options and distributions under certain
     benefit plans;

  .  employment arrangements and change of control agreements; and

  .  indemnification, and directors and officers' liability insurance
     policies.

   In discussing the fairness of the merger to the stockholders of Hach, the
Hach Board took into account these interests. These interests are summarized
below.

   Ownership and Voting Stock. On April 21, 1999, directors and executive
officers of Hach and their affiliates beneficially owned approximately 58% of
the outstanding shares of Hach common stock, including 5,128,334 shares of Hach
Class A common stock and 5,111,157 shares of Hach common stock. Kathryn C.
Hach-Darrow and Bruce J. Hach entered into a stockholders support agreement on
April 21, 1999 with Danaher, and delivered a written consent on that date
voting all shares of Hach stock over which they exercise voting control,
representing an aggregate of 53% of the outstanding voting Hach stock on April
21, 1999, to approve the merger agreement. Kathryn Hach-Darrow also received
rights to have Danaher register the sale of Danaher common stock she receives
in the merger under the Securities Act of 1933. For a further description, see
"Other Agreements --Stockholders Support Agreement" and "Other Agreements--
Registration Rights Agreement."

   As of June 2, 1999, 222,181 shares of Hach common stock and 573,585 shares
of Hach Class A common stock were issuable upon the exercise of outstanding
Hach stock options, which options, assuming an Exchange Ratio of 0.2987 (and
assuming a Danaher average stock price of $61.25, the closing price per share
of Danaher common stock on the NYSE on June 2, 1999) will be converted to
become approximately 120,400 shares of Danaher common stock in the aggregate.
All of the executive officers (other than Kathryn Hach-Darrow) and all of the
current non-employee directors of Hach currently hold Hach stock options which
will become shares of Danaher common stock.

   As of June 2, 1999, the number of vested Hach stock options beneficially
owned by the five most highly compensated executive officers of Hach for the
year ended April 30, 1999 will increase as a result of the merger from 61,346
stock options to 192,682 stock options, and, for all other executives officers
as a group, from 53,330 stock options to 114,501 stock options. For a further
description, see "The Merger Agreement--Covenants--Hach Stock Options."

   Hach Non-Employee Directors' Bonus Compensation Plan.

   As a result of the merger, the Hach Directors' Bonus Compensation Plan will
terminate and the cash value of the stock units and related amounts which were
awarded to the four non-employee directors who are participants in the plan
will be determined and distributed to those persons. Based upon the closing
price per share of Danaher common stock on June 2, 1999 of $61.25 and the
Exchange Ratio of .2987, the approximate cash value of the stock units and
related amounts that will be distributed to the four non-employee directors is
as follows:

<TABLE>
     <S>                                                                <C>
     Linda A. Doty..................................................... $ 70,000
     John N. McConnell................................................. $ 68,000
     Joseph V. Schwann................................................. $165,000
     Fred W. Wenninger................................................. $ 55,000
</TABLE>

   Hach Employment Agreements.

   Certain executive officers of Hach have employment agreements with Hach
which will come into effect upon the merger and thereafter will provide for
continued employment of such executive officer for a three year

                                       23
<PAGE>

term, which is automatically renewed annually for one year unless either party
gives six months prior written notice of termination. The executive officers
are entitled to an annual compensation rate and employment benefits, in each
case no less favorable than that in effect at the time of the merger. The
following table identifies the executive officers who have such employment
agreements and their current annual employment compensation.

<TABLE>
<CAPTION>
                                                                                Annual
   Executive Officer        Title                                          Compensation Rate
   -----------------        -----                                          -----------------
   <S>                      <C>                                            <C>
   Bruce J. Hach........... President and Chief Executive Officer              $200,000
   Gary R. Dreher.......... Vice President and Chief Financial Officer         $151,000
   Loel J. Sirovy.......... Senior Vice President, Operations                  $147,000
   Jerry M. Churchill...... Vice President, U.S. Sales                         $130,000
   Kenneth Ogan............ Vice President, Research and Development           $145,000
   Larry D. Thompson....... Vice President, Ames Chemical Operations           $109,000
   Brian K. Bowden......... Vice President, Information Systems Technology     $110,000
   Randall Petersen........ Director of Human Resources                        $107,000
</TABLE>

   Upon the death of the executive officer, Hach is obligated to make payments
to the beneficiary or representative of the deceased at a rate equal to one-
half of the annual compensation in effect on the date of death, until the end
of the term of the agreement. Such payments are not reduced by any life
insurance benefits payable directly to the deceased's beneficiaries or estate.
If the executive officer's employment is terminated by Hach by reason of such
executive officer's disability, Hach is obligated to pay a salary to such
executive officer at the annual rate in effect upon termination, reduced by
disability, governmental and wage continuation benefits, for the remaining term
of the agreement. The agreements entitle an executive officer to resign during
the employment period if, without his consent in any circumstance other than
his disability, his position with Hach is changed, other than to a position
with duties and responsibilities normally expected of someone in his prior
position, or Hach changes his office location by more than 25 miles. Upon such
resignation, the executive officer is entitled to a lump sum cash payment equal
to the annual compensation rate, based on his annual compensation rate at the
time of termination, which would have been payable to the executive officer
over the remaining term of the agreement had it not been terminated. The
executive officer is also entitled to a lump sum cash payment approximately
equal to any other benefits, including equity, which would have been payable to
him during such period. The agreements do not provide for termination by Hach
other than for disability or for Cause. "Cause" means any of the following acts
by the executive officer: fraud, conviction of a crime involving moral
turpitude, a material breach of the terms of the employment agreement, or
defalcation or other similar dishonesty involving the operations, funds or
other assets of Hach or its subsidiaries. Each agreement includes a covenant by
the executive officer providing that if his employment terminates for any
reason he will not for the following twelve months engage directly or
indirectly in any business competitive with Hach.

   It is presently estimated, based upon certain assumptions and data available
as of a recent date, that, if the employment of those executive officers of
Hach who have change of control employment agreements was terminated
immediately following the merger under circumstances entitling those persons to
severance benefits under those employment agreements, those persons would be
entitled to cash severance payments, excluding benefits, under these agreements
of approximately $3,297,000 in the aggregate. None of these agreements provides
for any gross-up payments.

   On April 30, 1998, in connection with the acquisition of Environmental Test
Systems, Inc. ("ETS"), the Company entered into an employment agreement with
Mark Stephenson, the President of ETS, who also became a Vice President of Hach
at that time. The initial term of the employment agreement is for the period
ending April 30, 2001 and is automatically renewed annually for one year unless
either party gives five months' prior written notice of termination. Mr.
Stephenson is to receive a base salary of $155,000, which may be increased but
not decreased by the Board of Directors, and is entitled to participate in
Hach's employee benefit plans, practices and programs, to the extent eligible.
If the agreement terminates because of the death of Mr. Stephenson or if Hach
terminates Mr. Stephenson's employment due to a disability, Mr. Stephenson, or
his designated beneficiary, is entitled to his base salary through the end of
the month in which such termination of

                                       24
<PAGE>

employment occurs and a pro rated bonus. If Hach terminates Mr. Stephenson's
employment for Cause, Mr. Stephenson is entitled to his base salary through the
date of such termination of employment. This agreement does not provide for
termination of employment by Hach other than for Cause or disability. Through
the first anniversary of any termination of employment, Mr. Stephenson has
agreed not to compete with Hach or its affiliates or to solicit any customers
or employees of Hach or its affiliates.

   "Cause" generally means any of the following acts by Mr. Stephenson: a
breach of a material provision of the employment agreement which is not cured
within ten days after receipt of notice from Hach, the failure to comply with
any written policy of the Hach or its affiliates which is not cured within 10
days of receiving notice from Hach, the appropriation of a business opportunity
of Hach or its affiliates, the misappropriation of any funds of Hach or its
affiliates, a conviction of or plea of guilty or no contest to any criminal
offense which involves dishonesty or breach of trust or any willful conduct
that is demonstrably and materially injurious to the reputation of Hach or its
affiliates. A termination for Cause requires a good faith determination of the
Board of Directors of Hach that one of the above acts occurred.

Effective Time of the Merger

   As soon as practicable on or after the closing of the merger, which closing
shall occur no later than the second business day after satisfaction or waiver
of all of the conditions to the merger, the merger will become effective upon
filing of the certificate of merger with the Secretary of State of the State of
Delaware or on such later date and time as may be specified in the certificate
of merger. The time at which the merger becomes effective is referred to in
this document as the "Effective Time." See "The Merger Agreement--Conditions."

Certificate of Incorporation and Bylaws

   At the Effective Time, the certificate of incorporation and bylaws of Merger
Sub as in effect immediately prior to the Effective Time shall be the
certificate of incorporation of the surviving corporation (except that the
certificate of incorporation shall be amended at the Effective Time to provide
that the name of the surviving corporation will be "Hach Company") until
thereafter changed or amended as provided in the certificate of incorporation
or by applicable law.

   At the Effective Time, the bylaws of Merger Sub as in effect immediately
prior to the Effective Time shall be the bylaws of the surviving corporation,
until thereafter changed or amended as provided in the bylaws or by applicable
law.

   The merger agreement provides that the certificate of incorporation and
bylaws of the surviving corporation will contain provisions with respect to
indemnification and exculpation from liability set forth in Hach's restated
certificate of incorporation and bylaws on the date of the merger agreement.
These provisions may not be amended, repealed or otherwise modified for a
period of six years following the Effective Time in any manner that would
adversely affect the rights of individuals who on or prior to the Effective
Time were directors, officers, employees or agents of Hach, unless the
modification is required by law. See "The Merger Agreement--Covenants."

Certain Federal Income Tax Consequences

   The following discussion is a summary description of the material U.S.
federal income tax consequences of the merger applicable to Hach stockholders
that are U.S. persons. This summary is not a complete description of all of the
potential tax effects of the merger and is based on the Internal Revenue Code,
as amended, Treasury Regulations, Internal Revenue Service rulings and judicial
opinions, all as in effect on the date of this information
statement/prospectus. All of the foregoing are subject to change and any such
change could affect the continuing validity of this discussion, which is not
binding on the Internal Revenue Service or the courts. Each Hach stockholder's
individual circumstances may affect the tax consequences of the merger to such
Hach stockholder, and the particular facts or circumstances of a Hach
stockholder that may so affect the

                                       25
<PAGE>

consequences are not considered below. This summary is not intended to apply to
Hach stockholders in special situations, such as dealers in securities, traders
in securities who elect to apply a mark-to-market method of accounting,
financial institutions, tax-exempt organizations, insurance companies, persons
holding shares of Hach common stock or shares of Danaher common stock as part
of a hedging, straddle, conversion, constructive sale or other integrated
transaction, non-U.S. persons, persons whose functional currency is not the
U.S. dollar, persons subject to the U.S. alternative minimum tax, persons who
acquired shares of Hach common stock pursuant to an employee stock option or
otherwise as compensation, and persons who do not hold shares of Hach stock as
capital assets within the meaning of Section 1221 of the Code. In addition, no
information is provided below with respect to the tax consequences of the
merger under state, local, or foreign laws or any federal laws other than those
pertaining to the income tax. Consequently, each Hach stockholder is advised to
consult a tax advisor as to the specific tax consequences of the merger to such
Hach stockholder.

   It is a condition to the obligation of Hach to consummate the merger that
Hach receive an opinion from McBride Baker & Coles, special tax counsel to
Hach, dated as of the closing date, to the effect that the merger will be
treated for federal income tax purposes as a reorganization qualifying under
the provisions of Section 368(a) of the Code, and that neither Hach nor any of
the stockholders of Hach will recognize any gain or loss for federal income tax
purposes as a result of the merger or receipt of the merger consideration,
except with respect to any cash received in lieu of a fractional share
interest. The treatment of cash received in the merger in lieu of a fractional
share interest is discussed below.

   It is a condition to the obligation of Danaher to consummate the merger that
Danaher receive an opinion from Wachtell, Lipton, Rosen & Katz, special tax
counsel to Danaher, dated as of the closing date, to the effect that the merger
will be treated for federal income tax purposes as a reorganization qualifying
under the provisions of Section 368(a) of the Code.

   In rendering the opinions described above, counsel may rely upon and
require, in form and substance reasonably acceptable to them, factual
representations, including those contained in certificates of officers of Hach,
Danaher, and Merger Sub.

   Based upon the advice of their respective counsel, Hach and Danaher expect
that the merger will qualify as a reorganization under the Code with the
consequences set forth above. Assuming that the merger so qualifies, the
aggregate tax basis of the Danaher common stock received by Hach stockholders
in the merger will be the same, in each instance, as the aggregate tax basis of
the Hach stock surrendered in exchange therefor, excluding any basis allocable
to fractional share interests in Danaher common stock for which cash is
received. In addition, the holding period of the shares of Danaher common stock
received by Hach stockholders in the merger will include the period during
which the shares of Hach stock surrendered in exchange therefor were held,
provided that such shares of Hach stock were held as capital assets at the
Effective Time.

   A Hach stockholder who receives cash in the merger in lieu of a fractional
share interest in Danaher common stock will be treated as having received the
fractional share interest and then having sold such interest for the cash
received. This sale will result in the recognition of gain or loss for federal
income tax purposes, measured by the difference between the amount of cash
received and the tax basis of the Hach stock allocable to such fractional share
interest. This gain or loss will be capital gain or loss, provided that the
Hach stock was held as a capital asset at the Effective Time. In addition, in
the case of an individual Hach stockholder, any such capital gain will be
subject to a maximum federal income tax rate of 20% if the stockholder's
holding period in the Hach stock was more than 12 months.

Accounting Treatment

   It is expected that the merger will be accounted for as a "pooling of
interests" transaction for accounting and financial reporting purposes. Under
such method of accounting, Hach stockholders and Danaher stockholders will be
deemed to have combined their existing voting common stock interests by virtue
of the exchange of shares of Hach stock for Danaher common stock. Accordingly,
the book value of the assets, liabilities and stockholders' equity of each of
Hach and Danaher, as reported on its respective consolidated balance sheet,
will be carried over to the consolidated balance sheet of Danaher, and no
goodwill will be created.

                                       26
<PAGE>

   In the merger agreement, Hach, Danaher and Merger Sub have agreed to use all
reasonable efforts to cause the merger to qualify, and not to take any actions
which the party knows or has reason to know could prevent the merger from
qualifying, for pooling-of-interests treatment. Hach further agreed that it
will use all reasonable best efforts to secure the waiver of any limited stock
appreciation rights or other rights to redeem for cash options or warrants of
Hach by each holder thereof and, subject to the prior consent of Danaher, which
shall not be unreasonably withheld, take such other actions as are necessary to
cure any facts or circumstances that could prevent the merger from qualifying
for pooling-of-interests accounting treatment, including by reissuing tainted
treasury shares as Danaher may approve. It is a condition to completion of the
merger that Danaher receive a letter from Arthur Andersen LLP, as independent
auditor of Danaher, to the effect that the merger is required to be accounted
for as a pooling of interests. In order to facilitate the treatment of the
merger as a "pooling of interests" and, therefore, to facilitate the
satisfaction of this condition and the covenants described above, Hach will
sell approximately 1.9 million shares of Hach common stock and approximately
2.3 million shares of Hach Class A common stock prior to the completion of the
merger.

   The unaudited pro forma financial information contained in this information
statement/prospectus has been prepared using the "pooling of interests"
accounting method to account for the merger. See "Summary Historical and
Unaudited Pro Forma Financial Information" and "Unaudited Pro Forma Combined
Financial Information."

Regulatory Approvals

   Under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended,
and the rules and regulations promulgated thereunder (the "HSR Act"), we may
not complete the merger unless certain filings have been submitted to the
Antitrust Division of the U.S. Department of Justice and the U.S. Federal Trade
Commission, and certain waiting period requirements have expired or are
otherwise earlier terminated by the Antitrust Division and the Federal Trade
Commission. On May 7, 1999, Hach and Danaher submitted the required filings to
the Antitrust Division and the Federal Trade Commission. The waiting period
under the HSR Act is expected to expire on June 6, 1999, unless extended by a
request for additional information or documentary materials.

   The Antitrust Division and the Federal Trade Commission frequently
scrutinize the legality under the antitrust laws of transactions such as the
merger. At any time before or after the completion of the merger, the Antitrust
Division or the Federal Trade Commission could take any action under the
antitrust laws as it deems necessary or desirable in the public interest,
including seeking to enjoin the completion of the merger or seeking the
divestiture of substantial assets of Hach or Danaher. Hach and Danaher believe
that the completion of the merger will not violate the antitrust laws. There
can be no assurance, however, that a challenge to the merger on antitrust
grounds will not be made, or, if a challenge is made, what the result will be.

   In addition, under the laws of certain foreign nations, we may not complete
the merger unless certain filings are made with these nations' antitrust
regulatory authorities and these authorities approve or clear the merger. In
particular, on May 21, 1999, Danaher notified the German Federal Cartel Office.
Hach and Danaher expect that the merger will not violate any foreign antitrust
laws and that all the foreign antitrust regulatory authorities whose approval
or clearance is required will approve or clear the merger.

Listing of Shares of Danaher Common Stock on the NYSE

   In the merger agreement, Danaher has agreed to use all reasonable efforts to
cause the shares of Danaher common stock which are to be issued pursuant to the
merger agreement and upon exercise of options granted to employees of Hach and
its subsidiaries to be listed for trading on the New York Stock Exchange, Inc.
(the "NYSE"). Such authorization for listing is a condition to the obligations
of Danaher, Merger Sub and Hach to consummate the merger.

                                       27
<PAGE>

Resale of Shares of Danaher Common Stock Issued in the Merger; Affiliates

   The shares of Danaher common stock to be issued to Hach stockholders in
connection with the merger and pursuant to the agreement and plan of
reorganization will be freely transferable under the Securities Act, except for
shares of Danaher common stock issued to any person deemed to be an affiliate
of Hach for purposes of Rule 145 under the Securities Act at the time of the
execution and delivery of the written consent by the controlling stockholders
on April 21, 1999. Those affiliates may not sell their shares of Danaher common
stock acquired in connection with the merger except pursuant to an effective
registration statement under the Securities Act covering such shares, or in
compliance with Rule 145 promulgated under the Securities Act or another
applicable exemption from the registration requirements of the Securities Act.

   Pursuant to the merger agreement, Hach has delivered to Danaher a letter
identifying all persons who at the time of the execution and delivery of the
written consent may be deemed to be affiliates under Rule 145 or under
applicable Commission accounting releases with respect to pooling-of-interests
accounting treatment. Hach has further agreed to use all reasonable efforts to
cause each person who is so identified as an affiliate in such letter to
deliver to Danaher on or prior to the date which is 30 days prior to the
Effective Time a written agreement that such affiliate will not sell, pledge,
transfer or otherwise dispose of any Danaher common stock received in the
merger in violation of the Securities Act, and that such affiliate will not
sell any shares of Danaher common stock or any shares of Hach stock or
otherwise reduce such affiliate's risk relative to any shares of Danaher common
stock until after such time as consolidated financial statements which reflect
at least 30 days of post-merger operations have been published by Danaher in
the form of a quarterly earnings report, an effective registration statement
filed with the Commission, a report to the Commission on Form 10-K, 10-Q or 8-
K, or any other public filing or announcement which includes the combined
results of operations. Receipt by Danaher of such a written agreement from each
person who may be deemed to be an affiliate of Hach for Rule 145 or pooling-of-
interests purposes is a condition to Danaher's obligation to close the merger.
Kathryn C. Hach Darrow and Bruce J. Hach delivered their own affiliate letters
on April 21, 1999. See "The Merger Agreement--Covenants;" "The Merger
Agreement--Conditions."

No Appraisal Rights

   Under Delaware law, stockholders in a public company are not generally
entitled to appraisal rights in a merger if the consideration they receive in
the merger consists only of shares listed on a national securities exchange and
cash in lieu of fractional shares. Accordingly, holders of Hach stock are not
entitled to appraisal rights in connection with the merger because the shares
of both Hach common stock and Hach Class A common stock are designated as
Nasdaq National Market securities and the shares of Danaher common stock are
listed on the NYSE and the Pacific Exchange.

                                       28
<PAGE>

                              THE MERGER AGREEMENT

   In this section of the information statement/prospectus, we describe the
material provisions of the merger agreement. We have attached a copy of the
merger agreement as Appendix A to this information statement/prospectus and
incorporate the merger agreement into this information statement/prospectus by
reference. The summary of the merger agreement we provide below is qualified in
its entirety by reference to the merger agreement. We encourage you to read the
merger agreement because it is the legal document that governs the merger.

The Merger

   Under the terms and subject to the conditions set forth in the merger
agreement, Merger Sub will merge with and into Hach, with Hach continuing as
the surviving corporation. The surviving corporation will be a wholly owned
subsidiary of Danaher after the merger.

Consideration To Be Received In The Merger; Exchange Ratio

   At the time of the merger, each outstanding share of Hach common stock and
Hach Class A common stock, other than shares held by Hach, any of its
subsidiaries, Danaher and Merger Sub, will be converted into the right to
receive a fraction of a validly issued, fully paid and nonassessable share of
Danaher common stock equal to the Exchange Ratio of .2987. The Exchange Ratio
may be subject to adjustment, as follows:

  .  If the Average Danaher Stock Price (as defined below) is less than
     $57.09, Hach may call off the merger, provided that if Hach does so call
     off the merger and on or before the second trading day following the
     Determination Date (as defined below), Danaher agrees to increase the
     Exchange Ratio to equal a fraction, the numerator of which is the
     product of $57.09 and the then current Exchange Ratio and the
     denominator of which is the Average Danaher Stock Price, then the merger
     agreement will not be terminated.

  .  If the Average Danaher Stock Price (as defined below) is more than
     $73.41, Danaher may call off the merger, provided that if Danaher does
     so call off the merger and on or before the second trading day following
     the Determination Date (as defined below), Hach agrees to decrease the
     Exchange Ratio to equal that fraction, the numerator of which is the
     product of $73.41 and the then current Exchange Ratio and the
     denominator of which is the Average Danaher Stock Price, then the merger
     agreement will not be terminated.

   For purposes of the merger agreement, the "Average Danaher Stock Price" is
the average of the daily last sale prices for a share of Danaher common stock
as reported on the NYSE Composite Transactions reporting system (as reported in
The Wall Street Journal or, if not reported therein, in another mutually agreed
upon authoritative source) for the fifteen consecutive trading days ending at
the close of trading on the date the last of the mutual closing conditions of
the parties set forth in the merger agreement are satisfied (or, if such date
is not a trading date for Danaher common stock, the immediately preceding
trading date) (the "Determination Date").

   Treatment of Hach Stock Held by Hach, Danaher and Merger Sub. Each share of
Hach stock owned by Hach as treasury stock, by its subsidiaries or by Merger
Sub will be automatically canceled and retired in the merger and will cease to
exist, and no securities of Danaher or other consideration will be delivered in
exchange for those shares. Each share of Hach stock owned by Danaher
immediately prior to the Effective Time will be converted into and exchanged
for one hundred thousandth of a fully paid and non assessable share of common
stock of the surviving corporation.

Procedures For Surrender Of Hach Certificates; Fractional Shares

   Surrender of Hach Certificates. As soon as reasonably practicable after the
Effective Time, SunTrust Bank, Atlanta, Georgia, Danaher's exchange agent for
the merger, will send a letter of transmittal and instructions with respect to
the surrender by Hach stockholders of their Hach stock certificates to each
former Hach stockholder.

                                       29
<PAGE>

   Upon surrender by the Hach stockholders of their stock certificates
representing shares of Hach stock together with a duly executed letter of
transmittal and other documents, the Hach stockholders will be entitled to
receive stock certificates representing whole shares of Danaher common stock
which such holder has the right to receive pursuant to the merger agreement in
respect of shares of Hach stock formerly evidenced by such Hach certificate,
together with a cash payment in lieu of fractional shares, if any.

   After the merger, until so surrendered to the exchange agent, each
certificate that previously represented shares of Hach stock will represent
only the right to receive upon surrender a certificate evidencing whole shares
of Danaher common stock into which such shares of Hach stock were converted in
the merger and cash in lieu of fractional shares of Danaher common stock, if
any, as described below.

   Holders of certificates previously representing shares of Hach stock will
not be paid dividends or other distributions payable to holders of record of
shares of Danaher common stock as of any record date after the Effective Time,
until their certificates are surrendered to the exchange agent. When their
certificates are surrendered, any unpaid dividends with a record date after the
Effective Time but prior to such surrender with respect to whole shares of
Danaher common stock and any cash in lieu of fractional shares of Danaher
common stock payable as described below will be paid without interest.

   We will close Hach's stock transfer books at the Effective Time, and no
further transfers of shares of Hach stock will be recorded on its stock
transfer books. If a transfer of ownership of Hach stock that is not registered
in the transfer records of Hach has occurred, a certificate representing the
proper number of shares of Danaher common stock will be issued to a person
other than the person in whose name the certificate so surrendered is
registered, together with a cash payment in lieu of fractional shares, if any,
and payment of dividends or distributions, if any, so long as the Hach stock
certificates are accompanied by all documents required to evidence and effect
the transfer, the person requesting such payment pays any transfer or other
taxes required by reason of the issuance of shares of Danaher common stock or
establishes to Danaher's satisfaction that such taxes have been paid.

   Fractional Shares. No fractional share of Danaher common stock will be
issued to any Hach stockholder upon surrender of certificates previously
representing Hach stock. Instead, the exchange agent will pay to each of those
stockholders an amount in cash determined by multiplying the fractional share
interest to which the holder would otherwise be entitled by the closing sale
price of a share of Danaher common stock on the NYSE composite tape on the last
trading day prior to the Effective Time.

Representations And Warranties

   Danaher, Merger Sub and Hach have made representations and warranties in the
merger agreement relating to, among other things:

  .  their corporate organization, qualification, standing and power;

  .  their capital structures;

  .  the authorization, execution, delivery, and enforceability of the merger
     agreement and related matters;

  .  required consents, approvals, orders and authorizations of governmental
     authorities relating to, and non-contravention of certain agreements as
     a result of, the merger agreement;

  .  documents filed by each of Danaher and Hach with the SEC and the
     accuracy of the information contained in such documents;

  .  absence of certain material changes or events with respect to Hach since
     April 30, 1998 and with respect to Danaher since January 1, 1999;

  .  litigation;

  .  compliance with applicable laws, permits and licensing requirements;

  .  treatment of the merger as a pooling-of-interests for accounting
     purposes;

  .  qualification of the merger as a reorganization for tax purposes;

                                       30
<PAGE>

  .  engagement of and payment of fees to brokers, investment bankers,
     finders and financial advisors in connection with the merger agreement;
     and

  .  accuracy of information to the provided in this information
     statement/prospectus.

   The merger agreement also contains certain representations and warranties of
Hach, relating to, among other things:

  .  its subsidiaries and its investments in other companies;

  .  the absence of undisclosed liabilities;

  .  board approval of the merger agreement and the merger;

  .  required stockholder vote in connection with the merger agreement and
     the merger;

  .  employee benefit plans and ERISA compliance;

  .  environmental matters;

  .  taxes and tax returns;

  .  absence of excess parachute payments;

  .  contracts and debt instruments;

  .  intellectual property;

  .  labor agreements;

  .  the opinion of its investment banker;

  .  inapplicability of Section 203 of the Delaware General Corporation Law
     and other state takeover laws; and

  .  "Year 2000" compliance.

   The merger agreement also contains the representation and warranty of
Danaher and Merger Sub regarding the purpose and operations of Merger Sub.

   The representations and warranties made by the parties to the merger
agreement will not survive the Effective Time, but they form the basis of a
condition to closing regarding the obligations of Danaher and Merger Sub, on
the one hand, and Hach, on the other hand.

Covenants

   Conduct of Business.

  .  Hach. Hach has agreed in the merger agreement that during the period
     from the date of the merger agreement and continuing until the Effective
     Time or the termination of the merger agreement, Hach will, and will
     cause its subsidiaries to, carry on their respective businesses in the
     ordinary course consistent with past practice and use all reasonable
     efforts to preserve intact their current business organizations, keep
     available the services of their current officers and employees and
     preserve their relationships with customers, suppliers and others having
     business dealings them. In addition, Hach has agreed to certain
     customary restrictions on the conduct of its business with regard to
     matters relating to: (1) dividends and changes in capital stock, (2)
     stock options and stock issuances, (3) amendments to organizational
     documents, (4) mergers, consolidations and acquisitions of assets,
     (5) sales and like transfers of assets, (6) incurrence of indebtedness,
     (7) capital expenditures, (8) tax matters, (9) settlement of actions,
     (10) compensation and employee benefits, (11) material contracts, and
     (12) other material actions.


                                       31
<PAGE>

  .  Danaher. Danaher has agreed in the merger agreement that during the
     period from the date of the merger agreement and continuing until the
     Effective Time or the termination of the merger agreement, Danaher will,
     and will cause its subsidiaries to, carry on their respective businesses
     in the ordinary course consistent with past practice and use all
     reasonable efforts to preserve their relationships with customers,
     suppliers and others having business dealings them, provided that the
     foregoing will not prevent them from disposing of or acquiring any
     assets or businesses or entering into any financing transactions if such
     action is, in the judgment of Danaher, desirable in the conduct of the
     business of Danaher and its subsidiaries. In addition, Danaher has
     agreed to certain customary restrictions on the conduct of its business
     with regard to matters relating to: (1) dividends and changes in capital
     stock, (2) amendments to organizational documents, and (3) other related
     material actions.

  .  Further agreements. Each of Danaher and Hach has agreed not to take any
     action that would result in any of the representations of such party in
     the merger agreement becoming untrue.

   No Solicitation. Hach has agreed that it will not and will not permit any of
its subsidiaries to, nor will it authorize or permit any officer, director,
advisor, representative of Hach or any of its subsidiaries to:

  .  solicit, encourage, or facilitate the submission of any proposal for a
     merger or other business combination involving Hach or any of its
     subsidiaries or any acquisition of any capital stock or any significant
     amount of the assets of Hach or any of its subsidiaries; or

  .  engage in discussions regarding, or provide any information to any
     person with respect to, or take any other action to facilitate any
     inquiries that constitute, or may reasonably be expected to lead to, any
     business combination or like transaction.

   Hach agreed to terminate any such existing discussions or negotiations with
respect to any such proposals (of which there were none) and to request the
return or destruction of any confidential information provided to any other
party in connection with any such discussion during the last 12 months. In
addition, Hach has agreed to notify Danaher promptly if it receives such a
proposal and provide Danaher with the material terms of the proposal and the
identity of the person making the proposal, and to keep Danaher informed on a
current basis of the status and details of any such request or proposal.

   Benefit Plans and Employee Matters in General. In the merger agreement,
Danaher agreed with Hach that following the merger it will cause the surviving
corporation to honor, the employment, severance and bonus agreements and
arrangements to which Hach is a party as of the merger. As a general rule, Hach
employees who continue employment after the effective time of the merger will
receive credit for pre-merger service for purposes of eligibility and vesting
(but not benefit accrual).

   In the merger agreement, Danaher also agreed with Hach that:

  .  for the period ending December 31, 1999, the surviving corporation shall
     continue the compensation and employee benefit and welfare plans and
     programs of Hach to the extent practicable as in effect on the date of
     the merger; and

  .  from and after January 1, 2000, the surviving corporation will provide
     the employees of Hach and its subsidiaries at the time of the merger as
     a whole (1) compensation (including bonus and incentive awards) programs
     and plans and (2) employee benefit and welfare plans, programs,
     contracts, agreements and policies (including insurance and pension
     plans), fringe benefits and vacation policies which are substantially
     the same as or not materially less favorable in the aggregate to such
     employees than those generally in effect with respect to similarly
     situated employees of Danaher.

Certain Hach plans will be affected by the merger as described in the following
paragraphs.

   Hach Stock Options. In the merger agreement, Hach and Danaher agreed to take
all necessary action to provide that at the time of the merger, all stock
options under any Hach stock option or stock appreciation

                                       32
<PAGE>

rights plan will be canceled and each holder of a stock option, whether or not
then exercisable, shall receive with respect to such stock option or right,
that number of whole shares of Danaher common stock equal to (1) the fair value
of such stock option divided by (2) the Average Danaher Stock Price. Hach
agreed to use its reasonable best efforts to receive any consents that may be
necessary to cancel the options in exchange for shares of Danaher common stock.

   For purposes of the merger agreement, the "fair value of such stock option"
is equal to the product of (x) the number of shares of Hach stock subject to
such stock option and (y) the excess, if any, of (A) the product of the
Exchange Ratio at the time of completion of the merger and the Average Danaher
Stock Price over (B) the exercise price of such stock option. The calculation
of the Average Danaher Stock Price is described at "--Consideration to Be
Received in the Merger; Exchange Ratio."

   Hach Deferred Compensation Plan. Each of those participants in the Hach
Deferred Compensation Plan who are eligible to participate in Danaher's
Executive Deferred Incentive Program ("EDIP") will have ten days following the
merger to elect to transfer his or her Hach Deferred Compensation Plan account
balance to an EDIP account as of December 31, 2000. The Hach Deferred
Compensation Plan will terminate on December 31, 2000, and account balances for
those persons who do not participate in the EDIP (or who have not elected to
transfer such account balances to EDIP accounts) will be paid to such
individuals in cash promptly.

   Hach Employee Stock Purchase Plan. Hach will amend its Employee Stock
Purchase Plan so that the current offering period will end prior to the merger.
No other offers will be made under this plan.

   Insurance and Indemnification. For three years after the merger, Danaher
will maintain in effect Hach's current directors' and officers' liability
insurance (or policies containing substantially similar coverage) covering acts
or omissions occurring prior to and as of the effective time of the merger.
Danaher and its subsidiaries will not, however, be required to pay, in total,
an annual premium for the insurance described in this paragraph in excess of
200% of the current annual premium paid by Hach for its existing coverage prior
to merger. However, if the annual premiums of that insurance coverage exceed
that amount, Danaher will be obligated to obtain a policy with the best
coverage available for a cost up to but not exceeding that amount.

   If the merger is completed, the certificate of incorporation and by-laws of
the surviving corporation shall contain the provisions of Hach's certificate of
incorporation and by-laws in effect as of the date of the merger agreement
affecting the indemnified parties' rights to indemnification, limitation of
liability and advancement of expenses will survive the completion of the merger
and will continue in full force and effect for a period of six years. Such
provisions may not be amended, repealed or modified in any manner that would
adversely affect the rights of those individuals who at the time of the merger
were directors, officers, employees or agents of Hach, unless such modification
is required by law. Danaher has agreed to cause the surviving corporation to
honor its indemnification obligations to such persons.

   Fees and Expenses. Pursuant to the merger agreement, whether or not the
merger is completed, Danaher and Hach will pay their own costs and expenses
incurred in connection with the merger and the merger agreement, and not the
other's.

   Tax Treatment. The merger agreement provides that Danaher, Merger Sub and
Hach must use all reasonable efforts to ensure that the merger qualifies, and
will not take any actions which that party knows or has reason to know could
prevent the merger from qualifying, as a tax free reorganization under Section
368(a) of the Internal Revenue Code.

   Accounting Treatment. In the merger agreement, Danaher, Merger Sub and Hach
have agreed to use all reasonable efforts to cause the merger to, and will not
take any actions which that party knows or has reason to know could prevent the
merger from qualifying, for pooling-of-interests treatment.

   Public Announcements. Danaher, Merger Sub and Hach have agreed to consult
with one another before issuing, and provide each other the opportunity to
review and comment upon the text of, any press release or public statement
relating to the transactions contemplated by the merger agreement and shall not
make any such statement prior to consultation, except as may be required by
applicable law, court process or by obligations pursuant to any listing
agreement with any national securities exchange.

                                       33
<PAGE>

   All Reasonable Efforts. Subject to the terms of the merger agreement, each
party has agreed to use all reasonable efforts to take or cause to be taken all
actions necessary, proper or advisable under applicable law to complete in the
most expeditious manner possible the merger and other transactions contemplated
in the merger agreement including:

  .  making all necessary registrations and filings with all third parties
     and governmental entities;

  .  obtaining all necessary consents, approvals or waivers from third
     parties; and

  .  executing and delivering all additional instruments necessary to
     complete the transactions contemplated by, and to carry out the purpose
     of, the merger agreement.

   We have also agreed to supply additional information that may be requested
pursuant to the HSR Act promptly and to take all other actions necessary to
cause the expiration or termination of the applicable waiting periods under the
HSR Act and in connection with other required consents as soon as practicable.

   Additional Covenants. The merger agreement provides for additional covenants
relating to, among other things, the preparation and filing of this information
statement/prospectus and the related registration statement on Form S-4, the
convening of a meeting of the Hach stockholders if requested by Danaher, access
to information and confidentiality, notifying the other parties of certain
breaches of representations and certain failures to comply with the covenants
of the merger agreement, and the delivery of information about and letters from
certain affiliates of Hach.

Conditions

   The obligations of each party to the merger agreement to complete the merger
are subject to the satisfaction or waiver of various conditions on or before
the Effective Time completed, which include, in addition to other customary
closing conditions, the following:

  .  no litigation brought by any governmental entity seeking to enjoin
     completion of the merger, and no order, executive order, stay, decree,
     judgment or injunction or statute, rule or regulation shall be in effect
     that prohibits the completion of the merger;

  .  any waiting period applicable to the merger under the HSR Act shall have
     terminated or expired;

  .  the registration statement on Form S-4 of which this information
     statement/prospectus is a part shall have been declared effective and
     shall not be the subject of any stop order, and any proceedings shall
     not have been brought or threatened by the SEC for that purpose;

  .  the Danaher common stock issuable to Hach stockholders pursuant to the
     merger agreement shall be approved for listing on the NYSE, subject to
     official notice of issuance; and

  .  all authorizations, consents, approvals, waivers or orders required to
     be obtained, and all filings, notices and declarations required to be
     made, by Danaher, Merger Sub and Hach prior to the completion of the
     merger and the related transactions shall have been obtained from, and
     made with, all required governmental entities except for such
     authorizations, consents, filings, approvals, waivers, orders, notices
     or declarations the failure to obtain or make would not have a material
     adverse effect, at or after the Effective Time, on Hach or Danaher.

   Except as may be waived in writing by Hach, the obligation of Hach to effect
the merger is also subject to the satisfaction of the following conditions:

  .  the representations and warranties of Danaher in the merger agreement
     (when read to exclude any qualification or exception as to materiality
     or material adverse effect) shall be true and correct as of the closing
     date of the merger except for such failures to be true and correct which
     could not, individually or in the aggregate, reasonably be expected to
     result in a material adverse effect on Danaher or Hach, provided that
     those representations and warranties that address matters only as of a
     particular date shall remain true and correct in all material respects
     as of such particular date; Hach shall have received a certificate
     executed on behalf of Danaher by the Chief Executive Officer of Danaher
     to such effect;

                                       34
<PAGE>

  .  Danaher shall have performed in all material respects all covenants
     required to be performed by it under the merger agreement at or prior to
     the closing date of the merger;

  .  Hach shall have received an opinion of McBride Baker & Coles, dated as
     of the closing date, to the effect that the merger will be treated for
     federal income tax purposes as a reorganization qualifying under the
     provisions of Section 368(a) of the Internal Revenue Code, and that
     neither Hach nor any of the shareholders of Hach will recognize any gain
     or loss for federal income tax purposes as a result of the merger or
     receipt of the merger consideration, except with respect to any cash
     received in lieu of a fractional share interest; and

  .  Danaher shall have signed and delivered the registration rights
     agreement.

   Except as may be waived in writing by Danaher and Merger Sub, the
obligation of Danaher and Merger Sub to effect the merger is also subject to
the satisfaction of the following conditions:

  .  the representations and warranties of Hach in the merger agreement (when
     read to exclude any qualification or exception as to materiality or
     material adverse effect) shall be true and correct as of the closing
     date of the merger except for such failures to be true and correct could
     not, individually or in the aggregate, reasonably be expected to result
     in a material adverse effect on Hach or Danaher provided that those
     representations and warranties which address matters only as of a
     particular date shall remain true and correct in all material respects
     as of such particular date; Danaher shall have received a certificate
     executed on behalf of Hach by the Chief Executive Officer and Chief
     Financial Officer of Hach to such effect;

  .  Hach shall have performed in all material respects all obligations
     required to be performed by it under the merger agreement at or prior to
     the closing date of the merger;

  .  Danaher shall have received an opinion of Wachtell, Lipton, Rosen & Katz
     to the effect that the merger will qualify as a reorganization within
     the meaning of Section 368(a) of the Internal Revenue Code;

  .  Danaher shall have received a letter from Arthur Andersen LLP to the
     effect that the merger is required to be accounted for as a pooling-of-
     interests by Danaher under generally accepted accounting principles;

  .  Hach has obtained the consent or approval of each person whose consent
     or approval is required in connection with the merger under all loan or
     credit agreements, notes, lease or other agreements or instruments to
     which Hach or any subsidiary is a party, except as would not have a
     material adverse effect on Hach prior to the Effective Time and on
     Danaher after the Effective Time; and

  .  Danaher has received from each person who is identified as an
     "affiliate" of Hach an agreement to comply with restrictions on such
     affiliates pursuant to Rule 145 under the Securities Act and under the
     pooling of interests accounting treatment rules.

Termination

   The merger agreement provides that prior to the Effective Time, the merger
agreement may be terminated:

  .  by mutual written consent of Danaher and Hach;

  .  by either Danaher or Hach if:

    (1) we do not complete the merger on or before October 31, 1999, except
        that a party may not terminate the merger agreement for this reason
        if its failure to fulfill its obligations is the cause of the merger
        not being completed by October 31, 1999;

    (2) any governmental entity issues a final non-appealable order, decree
        or ruling or has taken any other action that makes the merger
        illegal or permanently prohibits the completion of the merger; or

                                      35
<PAGE>

    (3) there has been a material breach by the other party of any of the
        other's representations, warranties, covenants or agreements
        contained in the merger agreement, which breach would result in the
        failure to satisfy the conditions regarding covenants and
        representations, and such breach is incapable of being cured by
        October 31, 1999.

  .  by Hach, if

    (1) at the close of business on the Determination Date if the Average
        Danaher Stock Price is less than $57.09;

    (2) Hach elects to terminate the merger agreement for such reason; and

    (3) on or before the end of the second trading day after the
        Determination Date, Danaher has not elected to increase the
        Exchange Ratio to equal that fraction of a share of Danaher common
        stock (rounded to four decimal points), the numerator of which is
        the product of $57.09 and the Exchange Ratio (as then in effect)
        and the denominator of which is the Average Danaher Stock Price.

  .  by Danaher, if

    (1) at the close of business or on the Determination Date, the Average
        Danaher Stock Price is more than $73.41;

    (2) Danaher elects to terminate the merger agreement for such reason;
        and

    (3) on or before the end of the second trading day after the
        Determination Date, Hach has not elected to decrease the Exchange
        Ratio to equal that fraction of a share of Danaher common stock
        (rounded to four decimal points), the numerator of which is the
        product of $73.41 and the Exchange Ratio (as then in effect) and
        the denominator of which is the Average Danaher Stock Price.

   Hach may elect not to terminate the merger agreement even if the Danaher
Average Stock Price falls below $57.09 per share or not to decrease the
Exchange Ratio if Danaher terminates the merger agreement if the Danaher
Average Stock Price rises above $73.41. In determining whether to elect to
terminate the merger agreement or to lower the Exchange Ratio in these
circumstances, the Hach Board will take into account, consistent with its
fiduciary duties, all relevant facts and circumstances existing at the time,
including, without limitation, whether it believes Danaher is prepared to
increase the Exchange Ratio, the market for comparable stocks in Hach's
industry, the relative value of shares of Danaher common stock in the market,
and the advice of its legal advisors and investment banker. By their approval
of the merger agreement in the written consent, Hach stockholders have
authorized the Hach Board to determine, in the exercise of its fiduciary
duties, to (1) proceed with the merger even though the value received per share
of Hach stock is less than $17.05 because the Danaher Average Stock Price is
below $57.09 and (2) allow Danaher to terminate the merger (and not to lower
the Exchange Ratio) because the Danaher Average Stock Price is more than $73.41
even though the value to be received per share of Hach stock would be at least
$21.93 based upon the Average Danaher Stock Price.

Amendments

   The parties to the merger agreement may amend the merger agreement, provided
that any amendment that by law or in accordance with the rules of any relevant
stock exchange requires further approval by the Hach stockholders will not be
made without the further approval of those stockholders. Any amendment will be
in writing.

Extension; Waiver

   The merger agreement permits Hach and Danaher to extend the time for
performance of any of the obligations of the other party, to waive any
inaccuracies in the representations of the other party and, subject to the
provision described in "--Amendment," waive compliance with any of the
agreements or conditions contained in the merger agreement.

                                       36
<PAGE>

                                OTHER AGREEMENTS

   The descriptions of the stockholders support agreement, the registration
rights agreement and the agreement and plan of reorganization set forth below
do not purport to be complete and are qualified in their entirety by reference
to those agreements. A copy of the stockholders support agreement is attached
as Appendix B to this information statement/prospectus and is incorporated by
reference herein. A copy of the form of registration rights agreement is
attached as Appendix D to this information statement/prospectus and is
incorporated by reference herein. A copy of the agreement and plan of
reorganization is attached as Appendix E to this information
statement/prospectus and is incorporated by reference herein.

Stockholders Support Agreement

   Agreement to Support Transaction. Concurrently with the execution of the
merger agreement, Danaher and the controlling stockholders, Mrs. Hach-Darrow
and Mr. Hach, entered into a stockholders support agreement. Mrs. Hach-Darrow
has served as the Chairman of Hach since 1988 and served as the Chief Executive
Officer of Hach from 1988 to 1998. As of June 2, 1999, Mrs. Hach-Darrow held
4,546,990 shares of Hach common stock and 4,541,647 shares of Hach Class A
common stock. After the merger, Mrs. Hach-Darrow will hold approximately 2% of
the outstanding shares of Danaher common stock. Mr. Hach has served as Chief
Executive Officer of Hach since 1998 and has served as President of Hach since
1988. Prior to serving as Chief Executive Officer, Mr. Hach was the Chief
Operating Officer of Hach since 1988. As of June 2, 1999, Mr. Hach held 247,318
shares of Hach common stock and 236,962 shares of Hach Class A common stock.
Pursuant to the stockholders support agreement, each controlling stockholder
agreed to execute and deliver, in accordance with Section 228 of the DGCL, a
written consent of Hach stockholders without a meeting, with respect to all
shares of Hach stock that such stockholder had the right to vote, to approve
and adopt the merger agreement and the merger. On April 21, 1999, promptly
after the execution and delivery of the merger agreement, each controlling
stockholder executed the written consent and delivered it to Hach. As a result,
no further vote or action by Hach's public stockholders is necessary to effect
the merger, except as may arise if certain amendments are proposed to be made
to the merger agreement that under the DGCL require stockholder approval. As of
April 21, 1999, the date the written consent was signed, the controlling
stockholders owned approximately 53% of the voting power of Hach stock. A copy
of the written consent is attached as Appendix C to this information
statement/prospectus and is incorporated by reference herein.

   In addition to delivering such written consent, each of the controlling
stockholders agreed in the stockholders support agreement to deliver any
additional written consents with respect to, or to vote, in person or by proxy,
all shares of Hach stock or other voting securities owned by such controlling
stockholder or her or his affiliates in favor of approval and adoption of the
merger agreement, the merger, and any action required in furtherance thereof,
and against any action or agreement that would result in a material breach of
any representation, warranty, covenant or obligation of Hach contained in the
merger agreement. Each controlling stockholder further agreed that she or he
would not, and would not permit any of her or his affiliates to, contract to
sell, sell or otherwise pledge, encumber, transfer or dispose of any shares of
Hach stock without giving prior written notice to Danaher and in any event if
such transaction could reasonably be expected to jeopardize Danaher's ability
to account for the merger as a pooling of interests.

   Pursuant to the stockholders support agreement, each controlling stockholder
also agreed that she or he and her or his affiliates will cooperate fully with
Danaher in connection with the merger agreement and the transactions
contemplated thereby, and that he or she and his or her affiliates will not,
directly or indirectly, encourage, solicit or engage in discussions or
negotiations with any third party (other than Danaher) concerning any business
combination, sale of a significant amount of assets, or other alternative
transaction, that he or she will terminate any current discussions and
negotiations, and that he or she will notify Danaher of any alternative
transaction and the identity of any third party making such proposal for an
alternative transaction.


                                       37
<PAGE>

   The stockholder support agreement terminates upon the first to occur of the
merger or termination of the merger agreement in accordance with its terms.

   Covenant Not to Compete. The stockholders support agreement further provides
that each controlling stockholder will not carry on or participate in business
similar to or in competition with any business conducted by Hach or assist or
advise any other person in such business, in each instance for a period of
three years after the Effective Time. The controlling stockholders also agreed
that for a five year period commencing at the Effective Time that each of them
would not lend or allow her or his name or reputation to by used in or to
promote any business related to Hach's businesses other than for the benefit of
Danaher and its affiliates or solicit or divert from Danaher and its affiliates
any business constituting, or any customer of, or any supplier of, any part of
the businesses then conducted by Hach, Danaher or any of their affiliates.

   Covenant Not to Solicit. Pursuant to the stockholders support agreement,
each controlling stockholder also agreed for a period of five years commencing
at the Effective Time not to induce or attempt to induce any person (1) engaged
or employed or within the prior 12 months by Hach or its affiliates to leave
the employ of Hach or its affiliates or in any other manner seek to contract
for the services of any such person in any capacity or (2) who is or has been
within the prior 12 months a customer or supplier with respect to any business
of Hach to interfere, in any way, directly or indirectly, with the business
relationship between Hach and any of is affiliates and any such customer.

Registration Rights Agreement

   Concurrently with the execution of the merger agreement, Danaher and Mrs.
Hach-Darrow agreed to a form of registration rights agreement, pursuant to
which, during the period commencing on the Effective Time and ending on the
first anniversary of the Effective Time (the "Registration Period"), Mrs. Hach-
Darrow shall have the right to request that Danaher register for sale under the
Securities Act all or a part of the Danaher common stock she acquires in the
merger and any securities issued or issuable to Mrs. Hach-Darrow in connection
with a stock dividend, stock split, reorganization, merger or similar
transaction in respect of any shares of Danaher common stock she acquires in
the merger. Mrs. Hach-Darrow is entitled to make one request to register these
shares of Danaher common stock during the Registration Period.

   The proposed registration rights agreement provides that Danaher may include
in the registration requested by Mrs. Hach-Darrow other securities for sale for
its own account or for the account of any other person, subject to certain
restrictions if marketing factors limit the number of shares to be included in
such registration. Under the registration rights agreement, Danaher is not
obligated to register any securities on a "shelf" registration statement
pursuant to Rule 415 under the Securities Act (or any successor provisions of
the Securities Act) or otherwise to register securities on a continuous or
delayed basis.

   The registration rights agreement also provides that Danaher is entitled to
postpone the request for registration or delivery of a prospectus or supplement
or amendment if it determines that in view of the advisability of deferring
public disclosure of material corporate developments or other information, the
disclosures required to be made pursuant thereto would not be in the best
interests of Danaher at that time. No single postponement of the request for
registration or delivery of a prospectus or supplement may exceed 90 days and
all such postponements may not exceed 180 days in the aggregate.

Agreement and Plan of Reorganization

   On the date of the merger agreement, Danaher entered into an agreement and
plan of reorganization with C&K Enterprises, Ltd., a Delaware corporation, and
the controlling stockholders of C&K, Mrs. Hach-Darrow and Mr. Hach. As of the
date of the agreement and plan of reorganization, C&K owned 1,511,415 shares of
Hach common stock and 1,511,415 shares of Hach Class A common stock, and the
controlling stockholders of C&K had the right to vote 92.78% of the outstanding
voting rights of C&K. The agreement and plan of reorganization contemplates the
reorganization of C&K, which is intended to occur immediately prior to

                                       38
<PAGE>

completion of the merger. Pursuant to the agreement and plan of reorganization,
all shares of Hach stock held by C&K will be exchanged with Danaher for shares
of Danaher common stock and cash in lieu of a fractional share of Danaher
common stock, if any, at the Exchange Ratio provided for in the merger
agreement. Pursuant to the agreement and plan of reorganization, promptly after
the exchange of shares of Hach stock for shares of Danaher common stock, C&K
will liquidate. The obligation of the parties to complete the reorganization is
conditioned upon satisfaction of the following conditions:

  .  satisfaction or waiver of the conditions to the merger set forth in the
     merger agreement;

  .  declaration of effectiveness of a registration statement covering the
     shares of Danaher common stock to be issued in this exchange;

  .  absence of any stop order suspending the effectiveness of the
     registration statement or any proceedings initiated or, to the knowledge
     of C&K or Danaher, threatened by the SEC and in each instance still
     ongoing; and

  .  approval for listing on the NYSE of the shares of Danaher common stock
     issuable pursuant to this agreement and plan of reorganization.

   It is a condition to C&K's, Mrs. Hach-Darrow's and Mr. Hach's obligation to
complete the C&K reorganization that they receive a legal opinion to the effect
that the C&K reorganization will be treated for federal income tax purposes as
a reorganization qualifying under the provisions of Section 368(a) of the
Internal Revenue Code and that neither C&K nor any of the controlling
stockholders of C&K will recognize any gain or loss for federal income tax
purposes as a result of the reorganization or receipt of the consideration in
such reorganization (except with respect to cash paid instead of fractional
shares). The agreement and plan of reorganization expressly provides that the
merger is not conditioned upon the completion of the reorganization of C&K
described above.

   In the merger, the shares of Hach common stock and Hach Class A common stock
acquired by Danaher pursuant to the C&K reorganization will not be canceled but
will be converted into and exchanged for one hundred-thousandth of a share of
common stock of the surviving corporation.

                                       39
<PAGE>

                        COMPARISON OF STOCKHOLDER RIGHTS

   Both Hach and Danaher are Delaware corporations and are governed by Delaware
law. In addition, the rights of Hach stockholders are currently governed by the
Hach restated certificate of incorporation, as amended, and the Hach bylaws,
and the rights of Danaher stockholders are governed by the Danaher certificate
of incorporation and the Danaher bylaws. After the Effective Time, the rights
of holders of Hach common stock and Hach Class A common stock who become
holders of Danaher common stock will be governed by the Danaher certificate of
incorporation, the Danaher bylaws and Delaware law. In most respects, the
rights of holders of Hach common stock and Hach Class A common stock (which is
distinguished from Hach common stock by the absence of voting rights) are
similar to the rights of holders of Danaher common stock. The following is a
summary of the material differences between such rights. This summary does not
purport to be a complete discussion of, and is qualified in its entirety by
reference to, Delaware law as well as to the Hach restated certificate of
incorporation, the Hach bylaws, the Danaher certificate of incorporation and
the Danaher bylaws, copies of which are on file with the SEC.

         Summary of Material Differences Between Current Rights of Hach
        Stockholders and Rights Those Stockholders Will Have as Danaher
                       Stockholders Following the Merger


<TABLE>
<CAPTION>
                         Hach Stockholder Rights              Danaher Stockholder Rights
<S>                      <C>                                  <C>
Authorized               The authorized capital stock of Hach The authorized capital stock of
Capital Stock:           consists of 25 million shares of     Danaher consists of 300 million
                         common stock and 20 million shares   shares of common stock and 15
                         of Class A common stock.             million shares of preferred stock.

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

Number of Directors:     The Hach restated certificate of     The Danaher certificate of
                         incorporation and bylaws both        incorporation requires no less than
                         require Hach to have no less than    3 directors, and the Danaher bylaws
                         three directors, and provide for the provide that the number
                         Hach Board to have the power to      of directors may be between 1 and
                         determine the total number. The Hach 15, as determined by the Danaher
                         Board currently consists of 9        Board. The Danaher Board currently
                         directors.                           consists of 7 directors.

- --------------------------------------------------------------------------------------------------
Classification of Board  Hach does not have a classified      The Danaher Board is divided into 3
of Directors:            board. The Hach bylaws require that  classes, with each class serving a
                         all directors be elected for a term  staggered 3 year term. There are
                         of one year or until his or her      currently
                         successor is elected and qualified.  2 classes with 3 directors, and 1
                                                              class with 1 director.


- --------------------------------------------------------------------------------------------------
Removal of Directors:    Pursuant to the Hach bylaws, any     Delaware law provides that the
                         director or the entire Hach Board    stockholders of a company with a
                         may be removed, either for or        classified board may remove a
                         without cause, at any time by the    director
                         affirmative vote of the holders of a only for cause, unless its
                         majority of all outstanding shares   certificate of incorporation
                         of Hach stock entitled to vote.      provides otherwise. Neither the
                                                              Danaher certificate of incorporation
                                                              nor the Danaher bylaws address the
                                                              removal of directors.
</TABLE>



                                       40
<PAGE>


<TABLE>
<CAPTION>
                         Hach Stockholder Rights              Danaher Stockholder Rights
<S>                      <C>                                  <C>
 Amendment of Corporate  The Hach restated certificate of     The Danaher certificate of
 Charter:                incorporation may be amended by      incorporation may be amended by the
                         board resolution and an affirmative  affirmative vote of holders of a
                         vote by holders of a majority of the majority of Danaher common stock
                         Hach common stock, except with       outstanding.
                         respect to:

                         (1) amending the provision described
                             in "Business Combination
                             Prohibitions" below, which
                             requires the affirmative vote of
                             80% of the outstanding Hach
                             stock entitled to vote on all
                             stockholder matters;

                         (2) proposals to change the par
                             value of the Hach Class A common
                             stock, other amendments to the
                             certificate of incorporation
                             that alter or change the powers,
                             preferences or special rights of
                             the Class A common stock so as
                             to adversely affect them or
                             other matters that may require
                             class voting under Delaware law,
                             in each such case the vote of
                             holders of Hach Class A common
                             stock as a class is required;
                             and

                         (3) proposals to change the number
                             of authorized shares of either
                             Hach common stock or Hach Class
                             A common stock, in which case
                             the affirmative vote of the
                             holders of a majority of the
                             outstanding Hach stock voting
                             together as a single class is
                             required.

- --------------------------------------------------------------------------------------------------
 Amendment of Bylaws:    The Hach bylaws may be altered or    The Danaher bylaws may be amended,
                         repealed by the holders of Hach      and new bylaws may be adopted, by
                         voting stock or by the Hach Board,   Danaher stockholders or the Danaher
                         if notice of the proposed change was Board, provided that notice of all
                         given in the notice of meeting and,  such amendment or adoption is
                         in the case of a meeting of the Hach included in the notice of such
                         Board, such notice was given no less Danaher stockholders meeting or
                         than two days before the meeting.    Danaher Board meeting. The Danaher
                         The Hach bylaws state that any       bylaws state that all such
                         alteration of the Hach bylaws by the amendments must be approved by
                         holders of Hach voting stock         either holders of a majority of all
                         requires the affirmative vote of at  outstanding Danaher common stock or
                         least a majority of the voting power a majority of the entire Danaher
                         of all outstanding stock entitled to Board then in office, including
                         vote.                                vacancies.

                                                              The Danaher certificate of
                                                              incorporation specifically provides
                                                              that no bylaws adopted by the
                                                              Danaher stockholders may invalidate
                                                              any prior act of the directors which
                                                              would have been valid if such bylaw
                                                              had not been adopted.
</TABLE>


                                       41
<PAGE>


<TABLE>
<CAPTION>
                Hach Stockholder Rights              Danaher Stockholder Rights
<S>             <C>                                  <C>
 Voting Stock:  The outstanding Hach voting stock is The outstanding Danaher voting stock
                Hach common stock and, in limited    consists solely of Danaher common
                instances, Hach Class A common       stock.
                stock. Holders of Hach Class A
                common stock may vote on the
                following matters:

                (1) proposals to change the par
                    value of Hach Class A common
                    stock, other amendments to the
                    certificate of incorporation
                    that alter or change the powers,
                    preferences or special rights of
                    the Class A common stock so as
                    to adversely affect them or
                    other matters that may require
                    class voting under Delaware law,
                    in each such case the vote of
                    holders of Class A common as a
                    class is required;

                (2) proposals to change the number
                    of authorized shares of either
                    Hach common stock or Hach Class
                    A common stock, in which case
                    the affirmative vote of holders
                    of a majority of all outstanding
                    Hach stock voting together as a
                    single class is required; and

                (3) all matters presented to Hach
                    stockholders (a) automatically
                    at the time the number of
                    outstanding shares of Hach
                    common stock is less than 10% of
                    the aggregate number of
                    outstanding shares of Hach Class
                    A common stock and Hach common
                    stock; or (b) upon the
                    resolution of the Hach Board if,
                    as a result of the existence of
                    the Hach Class A common stock,
                    the Hach common stock and/or the
                    Hach Class A common stock are,
                    or will be, excluded from
                    quotation on the NASDAQ National
                    Market System and on principal
                    national exchanges.
</TABLE>


                                       42
<PAGE>


<TABLE>
<CAPTION>
                        Hach Stockholder Rights              Danaher Stockholder Rights
<S>                     <C>                                  <C>
 Exculpation of         Pursuant to its bylaws, Hach will    Pursuant to its bylaws, Danaher will
 Directors and          indemnify any director or officer of indemnify any director, officer,
 Officers:              Hach (or any director, officer,      employee, agent or fiduciary of
                        employee or agent of another entity  Danaher (or of another entity if
                        if serving at the request of Hach)   serving at the request of Danaher)
                        to the fullest extent permitted by   to the fullest extent permitted by
                        the DGCL as it may be amended (but   Delaware law. The Danaher
                        only if such amendment permits Hach  certificate of incorporation
                        to provide broader coverage than     provides that Danaher will indemnify
                        prior to the amendment), provided    to the fullest extent permitted by
                        that, if the person seeks            law any person made, or threatened
                        indemnification in connection with a to be made, party to an action or
                        proceeding that he or she initiated, proceeding by reason of the fact
                        the Hach Board approved the          that he is or was a director or
                        proceeding. The Hach bylaws further  officer of Danaher or that such
                        provide that Hach may indemnify its  director or officer was serving any
                        employees and agents if the Hach     other entity in any capacity at the
                        Board so authorizes.                 request of Danaher. The Danaher
                                                             certificate of incorporation further
                                                             provides that no director shall be
                                                             personally liable to Danaher or its
                                                             stockholders for monetary damages
                                                             for any breach of fiduciary duty,
                                                             except for any breach of the duty of
                                                             loyalty, for any act not in good
                                                             faith or which involves intentional
                                                             misconduct or a knowing violation of
                                                             the law, for unlawful dividends,
                                                             repurchases or redemptions under
                                                             Delaware law, or for any transaction
                                                             in which that director received an
                                                             improper personal benefit.

                        The Hach restated certificate of
                        incorporation provides that Hach
                        shall to the full extent permitted
                        by the DGCL, as amended from time to
                        time, indemnify all persons whom it
                        may indemnify pursuant to the DGCL.
                        It also states that no director
                        shall be personally liable to Hach
                        or its stockholders for monetary
                        damages for breach of fiduciary duty
                        as a director, except for any breach
                        of the duty of loyalty, for any act
                        not in good faith or which involves
                        intentional misconduct or a knowing
                        violation of the law, for unlawful
                        dividends, repurchases or
                        redemptions under Delaware law, or
                        for any transaction in which that
                        director received an improper
                        personal benefit.

- -------------------------------------------------------------------------------------------------
 Business Combination   The Hach restated certificate of     None.
 Prohibitions:          incorporation contains two articles
                        that could inhibit certain business
                        combinations. The first provision
                        requires the affirmative vote of the
                        holders of 80% of Hach common stock
                        to approve (1) the adoption of a
                        merger agreement; (2) the sale of
                        substantially all the assets of
                        Hach; or (3) the issuance by Hach or
                        a subsidiary of voting stock in
                        excess of 10% of Hach common stock
                        outstanding, if, in either case, the
                        other entity is the beneficial owner
                        of more than 5% of the outstanding
                        shares of Hach voting stock,
                        including shares it has the right to
                        acquire pursuant to conversion
                        rights, warrants or options or that
                        it can vote, buy or dispose of
                        pursuant to agreement.
</TABLE>


                                       43
<PAGE>


<TABLE>
<CAPTION>
                          Hach Stockholder Rights              Danaher Stockholder Rights
<S>                       <C>                                  <C>
                          This requirement does not apply if
                          the Hach Board by resolution
                          approves a memorandum of
                          understanding with the other entity
                          prior to the time such entity has
                          become a holder of more than 5% of
                          the outstanding shares of Hach
                          voting stock. This requirement also
                          does not apply if Hach or one of its
                          subsidiaries holds a majority of the
                          voting power of the other person.
                          This provision may only be amended
                          or appealed by the affirmative vote
                          of the holders of 80% of Hach voting
                          stock.

                          The second provision requires a
                          person who acquires 15% or more of
                          outstanding share of Hach common
                          stock and does not at the same time
                          own 15% or more of the outstanding
                          shares of Hach Class A common stock
                          to make a public tender offer to
                          acquire the number of additional
                          shares of Hach Class A common stock
                          such that that person would hold
                          equivalent percentages of
                          outstanding Hach common stock and
                          Hach Class A common stock.

                          The provision contains a formula for
                          determining the price at which the
                          tender offer must be made and is
                          triggered not only at the 15%
                          threshold but at every increment of
                          5% above that threshold. Certain
                          acquisitions that cross the
                          threshold (by gift, devise, etc.) do
                          not trigger this provision.

                          Failure to comply with this
                          provision suspends the right to vote
                          those shares of Hach common stock
                          held by that person.

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

Stockholder Rights Plan:  Hach does not have a stockholder      Danaher does not have a stockholder
                          rights plan.                          rights plan. While Danaher has no
                                                                present intention to adopt a
                                                                stockholder rights plan, the Danaher
                                                                Board, pursuant to its authority to
                                                                issue Danaher preferred stock, could
                                                                do so without Danaher stockholder
                                                                approval at any future time.
</TABLE>


                                       44
<PAGE>


<TABLE>
<CAPTION>
                     Hach Stockholder Rights              Danaher Stockholder Rights
<S>                  <C>                                  <C>
Special Meetings of  Special meetings of Hach             The Danaher bylaws provide that
Stockholders:        stockholders may only be called by   the chairman, the president, any
                     the chairman of the Hach Board or by vice president, the secretary or
                     the Hach Board pursuant to a         any assistant secretary of
                     resolution adopted by a majority of  Danaher may call a special
                     all directors, subject to the rights meeting, and such officers shall
                     of holders of Hach preferred stock.  call a special meeting if
                                                          requested in writing by a
                                                          majority of the Danaher Board or
                                                          by Danaher stockholders owning a
                                                          majority of the capital stock of
                                                          Danaher issued and outstanding
                                                          and entitled to vote.
</TABLE>


                                       45
<PAGE>

               UNAUDITED PRO FORMA COMBINED FINANCIAL INFORMATION

   The following unaudited pro forma combined financial information should be
read in conjunction with the financial statements, including the notes thereto,
of Danaher and Hach, which are incorporated by reference in this information
statement/prospectus. The pro forma information is presented for illustration
purposes only and is not necessarily indicative of the operating results or
financial position that would have occurred if the merger had been consummated
in accordance with the assumptions set forth below, nor is it necessarily
indicative of future operating results or financial position.

                   UNAUDITED PRO FORMA COMBINED BALANCE SHEET

   The following unaudited pro forma combined balance sheet presents, under the
pooling-of-interests accounting method, the consolidated balance sheet of
Danaher as of December 31, 1998 combined with the balance sheet of Hach as of
January 30, 1999.

<TABLE>
<CAPTION>
                                                          Pro
                                                         Forma      Pro Forma
                                    Danaher      Hach    Adj.        Balance
                                   ----------  -------- -------     ----------
                                               (in thousands)
<S>                                <C>         <C>      <C>         <C>
Assets
Current Assets:
  Cash and Equivalents............ $   41,923  $  5,875             $   47,798
  Accounts Receivable.............    467,108    18,435                485,543
  Inventories.....................    323,486    13,995                337,481
  Prepaids and Other..............     54,387     6,487                 60,874
                                   ----------  --------             ----------
    Total Current Assets..........    886,904    44,792                931,696
  Plant, Property and Equipment,
   net............................    471,025    39,173                510,198
  Other Assets....................     96,213    14,931                111,144
  Excess Cost over net assets,
   net............................  1,284,573     3,248              1,287,821
                                   ----------  --------             ----------
    Total Assets.................. $2,738,715  $102,144             $2,840,859
                                   ==========  ========             ==========
Liabilities
Current Liabilities:
  Notes Payables, current
   portion........................ $   59,639  $     82             $   59,721
  Accounts Payable................    158,596     3,185                161,781
  Accrued Expenses................    470,470     9,273 $10,000(2)     489,743
                                   ----------  -------- -------     ----------
    Total Current Liabilities.....    688,705    12,540  10,000        711,245
  Other Long-Term Liabilities.....    285,261     9,646                294,907
  Long-Term Debt..................    412,918    31,000                443,918
  Shareholders' Equity:
  Common Stock....................      1,467    23,246 (23,246)         1,467
  Additional Paid-In Capital......    374,412     9,035  23,246        406,693
  Cumulative Adjustment and
   Other..........................     (2,703)      330                 (2,373)
  Retained Earnings...............    978,655    16,347 (10,000)(2)    985,002
  Total Shareholders' Equity......  1,351,831    48,958 (10,000)     1,390,789
                                   ----------  -------- -------     ----------
    Total......................... $2,738,715  $102,144 $     0     $2,840,859
                                   ==========  ======== =======     ==========
</TABLE>

   See accompanying notes to the unaudited pro forma combined financial
information.

                                       46
<PAGE>

              UNAUDITED PRO FORMA COMBINED STATEMENTS OF EARNINGS

   The following unaudited pro forma combined statements of earnings present,
under the pooling-of-interests accounting method, the consolidated statements
of earnings of Danaher for the years ended December 31, 1998, December 31, 1997
and December 31, 1996, combined with the statements of earnings of Hach for the
twelve months ended January 30, 1999, January 31, 1998 and January 25, 1997.

<TABLE>
<CAPTION>
                                         Year Ended 12/31/98
                                      ---------------------------  Pro Forma
                                        Danaher      Hach(1)(3)     Results
                                      ------------- ------------- -------------
                                      (in thousands, except per share data)
<S>                                   <C>           <C>           <C>
Net Sales............................ $   2,910,038  $   137,023  $   3,047,061

Cost of Sales........................     1,821,084       68,145      1,889,229
SG & A...............................       722,116       51,604        773,720
Total Expenses.......................     2,543,200      119,749      2,662,949
                                      -------------  -----------  -------------
Operating Profit.....................       366,838       17,274        384,112
Other Expense........................        40,796            0         40,796
Interest Expense, Net................        24,931        1,376         26,307
                                      -------------  -----------  -------------
Earnings before Taxes................       301,111       15,898        317,009

Taxes................................       118,165        6,658        124,823
                                      -------------  -----------  -------------
Net Earnings......................... $     182,946  $     9,240  $     192,186
                                      =============  ===========  =============

EPS-Basic............................         $1.36        $0.54          $1.37
EPS-Diluted..........................         $1.32        $0.54          $1.33
Average Shares-Basic.................       134,745       16,976        139,816
Average Shares-Diluted...............       138,885       17,079        143,987

<CAPTION>
                                         Year Ended 12/31/97
                                      ---------------------------  Pro Forma
                                        Danaher      Hach(1)(3)     Results
                                      ------------- ------------- -------------
                                      (in thousands, except per share data)
<S>                                   <C>           <C>           <C>
Net Sales............................ $   2,492,002  $   127,098  $   2,619,100

Cost of Sales........................     1,598,431       65,060      1,663,491
SG & A...............................       592,515       43,748        636,263
Total Expenses.......................     2,190,946      108,808      2,299,754
                                      -------------  -----------  -------------
Operating Profit.....................       301,056       18,290        319,346

Interest Expense, Net................        13,211         (218)        12,993
                                      -------------  -----------  -------------
Earnings before Taxes................       287,845       18,508        306,353

Taxes................................       111,239        6,538        117,777
                                      -------------  -----------  -------------
Net Earnings......................... $     176,606  $    11,970  $     188,576
                                      =============  ===========  =============

EPS-Basic............................         $1.32        $0.62          $1.35
EPS-Diluted..........................         $1.28        $0.62          $1.31
Average Shares-Basic.................       133,999       19,170        139,725
Average Shares-Diluted...............       137,730       19,248        143,479
</TABLE>

See accompanying notes to the unaudited pro forma combined financial
information.

                                       47
<PAGE>

<TABLE>
<CAPTION>
                                                Year Ended 12/31/96
                                               --------------------- Pro Forma
                                                Danaher   Hach(1)(3)  Results
                                               ---------- ---------- ----------
                                               (in thousands, except per share
                                                            data)
<S>                                            <C>        <C>        <C>
Net Sales..................................... $2,233,193  $119,056  $2,352,249

Cost of Sales.................................  1,409,693    61,187   1,470,880
SG & A........................................    556,094    40,864     596,958
Total Expenses................................  1,965,787   102,051   2,067,838
                                               ----------  --------  ----------
Operating Profit..............................    267,406    17,005     284,411

Interest Expense, Net.........................     16,813    (1,585)     15,228
                                               ----------  --------  ----------
Earnings before Taxes.........................    250,593    18,590     269,183

Taxes.........................................     96,236     6,436     102,672
                                               ----------  --------  ----------
Net Earnings from Continuing Operations.......    154,357    12,154     166,511
Discontinued Operations.......................     79,811         0      79,811
Net Earnings..................................   $234,168   $12,154    $246,322
                                               ==========  ========  ==========


EPS from Continuing Operations-Basic..........      $1.16     $0.53       $1.19
EPS from Continuing Operations-Diluted........      $1.13     $0.53       $1.17
EPS from Discontinued Operations-Basic........      $0.60     $0.00       $0.57
EPS from Discontinued Operations-Diluted......      $0.59     $0.00       $0.56
EPS-Net Earnings-Basic........................      $1.76     $0.53       $1.76
EPS-Net Earnings-Diluted......................      $1.72     $0.53       $1.72
Average Shares-Basic..........................    132,950    22,728     139,739
Average Shares-Diluted........................    136,123    22,735     142,914
</TABLE>

See accompanying notes to the unaudited pro forma combined financial
information.

                                       48
<PAGE>

         Notes to Pro Forma Combined Financial Information (Unaudited)

(1) Hach's fiscal year has historically ended in April. The pro forma
    information is presented in accordance with Danaher's fiscal year which
    ends December 31. Hach's balances for twelve month periods ending
    approximately one month later than the Danaher periods have been included
    in these combined statements. In the opinion of Danaher's management, this
    difference is not material.

(2) Merger expenses of approximately $10 million are based on a preliminary
    estimate and are made up of approximately equal amounts related to: (i)
    transaction costs associated with the merger; and (ii) integrating and
    implementing efficiencies associated with information, operational and
    administrative systems.

(3) Earnings per share includes all shares of Hach common stock and Hach Class
    A common stock (or Hach stock and equivalents, as appropriate) based on the
    Exchange Ratio of 0.2987 shares of Danaher for each share of Hach common
    stock or Hach Class A common stock (or equivalent).

                                       49
<PAGE>

                                    EXPERTS

   The consolidated balance sheets of Danaher as of December 31, 1998 and 1997
and the consolidated statements of income, changes in stockholders' equity, and
cash flows for each of the three years in the period ended December 31, 1998,
incorporated by reference in this information statement/prospectus, have been
audited by Arthur Andersen LLP, independent public accountants, as indicated in
their reports with respect thereto, and are included herein, in reliance upon
their authority as experts in accounting and auditing in giving said reports.

   The consolidated balance sheets of Hach as of April 30, 1998 and 1997 and
the consolidated statements of income, changes in stockholders' equity and cash
flows for each of the three years in the period ended April 1998 in the Annual
Report on Form 10-K of Hach for the year ended April 30, 1998, incorporated by
reference in this information statement/prospectus, have been so incorporated
in reliance on the report of PricewaterhouseCoopers LLP, independent
accountants, given on the authority of that firm as experts in auditing and
accounting.

   With respect to the unaudited consolidated financial information on Hach for
the periods ended August 1, 1998, October 31, 1998 and January 30, 1999,
incorporated by reference in this information statement/prospectus,
PricewaterhouseCoopers LLP reported that they have applied limited procedures
in accordance with professional standards for a review of such information.
However, their separate reports dated August 19, 1998, November 18, 1998 and
February 16, 1999 incorporated by reference herein, state that they did not
audit and they do not express an opinion on the unaudited consolidated
financial information. Accordingly, the degree of reliance on their reports on
such information should be restricted in light of the limited nature of the
review procedures applied. PricewaterhouseCoopers LLP is not subject to the
liability provisions of Section 11 of the Securities Act of 1933 for their
reports on the unaudited consolidated financial information because those
reports are not "reports" or "parts" of the registration statement prepared or
certified by PricewaterhouseCoopers LLP within the meaning of Sections 7 and 11
of the Act.

                                 LEGAL MATTERS

   The validity of the shares of Danaher common stock to be issued in the
merger will be passed upon for Danaher by Wilmer, Cutler & Pickering,
Washington, D.C., counsel to Danaher. Certain legal matters with respect to the
federal income tax consequences of the merger will be passed upon for Danaher
by Wachtell, Lipton, Rosen & Katz, New York, New York. Certain legal matters
with respect to the federal income tax consequences of the merger will be
passed upon for Hach by McBride Baker & Coles, Chicago, Illinois. Certain legal
matters with respect to the federal income tax consequences of the C&K
reorganization will be passed upon for C&K by Sidley & Austin, Chicago,
Illinois.

                      WHERE YOU CAN FIND MORE INFORMATION

   Hach and Danaher file annual, quarterly and special reports, proxy
statements and other information with the Commission. You may read and copy any
reports, statements or other information that we have filed at the Commission's
public reference rooms. Please call the Commission at 1-800-SEC-0330 for
information on the public reference rooms or visit the following locations of
the Commission:

Public Reference Room      New York Regional Office   Chicago Regional Office
450 Fifth Street, N.W.     7 World Trade Center       Citicorp Center
Room 1024                  Suite 1300                 500 West Madison Street
Washington, DC 20549       New York, New York 10048   Suite 1400
                                                      Chicago, Illinois 60661-
                                                      2511

   You may also obtain copies of this information by mail from the Public
Reference Section of the Commission, 450 Fifth Street, N.W., Room 1024,
Washington, D.C. 20549, at prescribed rates. Our Commission filings are also
available to the public from commercial document retrieval services and at the
web site maintained by the Commission at http://www.sec.gov.

                                       50
<PAGE>

   Danaher filed a registration statement on Form S-4 to register with the
Commission Danaher common stock that may be issued to Hach stockholders in the
merger. This information statement/prospectus is a part of that registration
statement and constitutes a prospectus of Danaher in addition to being an
information statement of Hach. As allowed by Commission rules, this information
statement/prospectus does not contain all the information you can find in the
registration statement or the exhibits to the registration statement.

   The Commission allows Hach and Danaher to "incorporate by reference"
information into this information statement/prospectus, which means important
information may be disclosed to you by referring you to another document filed
separately with the Commission. The information incorporated by reference is
deemed to be part of this information statement/prospectus, except for any
information superseded by information in (or incorporated by reference in) this
statement/prospectus. This information statement/prospectus incorporates by
reference the documents set forth below that have been previously filed with
the Commission. These documents contain important information about our
companies and their financial condition.

<TABLE>
<CAPTION>
Danaher SEC Filings                         Description or
(File No. 001-08089 )                       Period/As of Date
=========================================== -------------------------------------------
<S>                                         <C>
Annual Report on Form 10-K                  Year ended December 31, 1998

Quarterly Report on Form 10-Q               Quarter ended March 31, 1999

Registration Statement on Form S-4 dated    Description of Danaher common stock
June 8, 1998                                contained therein and any amendment or
                                            report filed for the purpose of updating
                                            such description.

Proxy Statement                             Dated March 30, 1999

<CAPTION>
Hach SEC Filings                            Description or
(File No. 000-03947)                        Period/As of Date
=========================================== -------------------------------------------
<S>                                         <C>
Annual Report on Form 10-K                  Year ended April 30, 1998

Quarterly Report on Form 10-Q               Quarters ended August 1, 1998, October 31,
                                            1998 and January 30, 1999

Current Report on Form 8-K                  Filed on May 14, 1998 and on May 4, 1999

Proxy Statement                             Dated August 7, 1998
</TABLE>

   Hach and Danaher are also incorporating by reference additional documents
that either company may file with the Commission pursuant to the Securities
Exchange Act of 1934, as amended, and the rules and regulations promulgated
thereunder, between the date of this information statement/prospectus and the
Effective Time. These include periodic reports, such as annual reports on Form
10-K, quarterly reports on Form 10-Q, and current reports on Form 8-K, as well
as proxy statements.

   Danaher has supplied all information contained or incorporated by reference
in this information statement/prospectus relating to Danaher, and Hach has
supplied all such information relating to Hach.

   If you are a stockholder, Danaher and Hach may have sent you some of the
documents incorporated by reference, but you can obtain any of them through us,
the Commission, or the Commission Internet world wide web site as described
above. Documents incorporated by reference are available from us without
charge, excluding all exhibits unless we have specifically incorporated by
reference an exhibit in this information statement/prospectus. Stockholders may
obtain documents incorporated by reference in this information
statement/prospectus by requesting them in writing or by telephone from the
appropriate party at the following address:

     Hach Company                       Danaher Corporation
     5600 Lindbergh Drive               1250 24th Street, N.W., Suite 800
     Loveland, Colorado 80538           Washington, D.C. 20037
     Tel.: (970) 669-3050               Tel.: 202-828-0850
     Attention: Chief Financial Officer Attention: Corporate Secretary
     website: http://www.hach.com       website: http://www.danaher.com


                                       51
<PAGE>

   If you would like to request documents from us, please do so by June 25,
1999 to receive them before the Effective Time. If you request any incorporated
documents from us, we will mail them to you by first class mail, or another
equally prompt means, within one business day after we receive your request.

   We have authorized no one to give you any information or to make any
representation about the proposed merger involving our companies that differs
from or adds to the information contained in this information
statement/prospectus or in the documents our companies have publicly filed with
the Commission. Therefore, if anyone should give you any different or
additional information, you should not rely on it.

   If you live in a jurisdiction where it is unlawful to offer to exchange or
sell, or to ask for offers to exchange or buy, the securities offered by this
information statement/prospectus, or to ask for proxies, or, if you are a
person to whom it is unlawful to direct such activities, then the offer
presented by this information statement/prospectus does not extend to you.

   The information contained in this document speaks only as of the date
indicated on the cover of this document unless the information specifically
indicates that another date applies.

                                       52
<PAGE>

                                                                      APPENDIX A

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

                                                                  EXECUTION COPY


                          AGREEMENT AND PLAN OF MERGER

                           Dated as of April 21, 1999

                                     Among

                              DANAHER CORPORATION,

                             H2O ACQUISITION CORP.

                                      And

                                  HACH COMPANY



- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>

                               TABLE OF CONTENTS

                                   ARTICLE I

                                   The Merger
<TABLE>
<CAPTION>
                                                                          Page
                                                                          ----
 <C>           <S>                                                        <C>
 SECTION 1.1.  The Merger...............................................   A-1
 SECTION 1.2.  Closing..................................................   A-1
 SECTION 1.3.  Effective Time...........................................   A-2
 SECTION 1.4.  Effects of the Merger....................................   A-2
 SECTION 1.5.  Certificate of Incorporation and By-laws.................   A-2
 SECTION 1.6.  Directors................................................   A-2
 SECTION 1.7.  Officers.................................................   A-2

                                   ARTICLE II

                Effect of the Merger on the Capital Stock of the
               Constituent Corporations; Exchange of Certificates

 SECTION 2.1.  Effect on Capital Stock..................................   A-2
 SECTION 2.2.  Exchange of Certificates.................................   A-3

                                  ARTICLE III

                         Representations and Warranties

 SECTION 3.1.  Representations and Warranties of the Company............   A-5
 SECTION 3.2.  Representations and Warranties of Parent and Sub.........  A-15

                                   ARTICLE IV

                   Covenants Relating to Conduct of Business

 SECTION 4.1.  Conduct of Business......................................  A-18
 SECTION 4.2.  No Solicitation..........................................  A-21

                                   ARTICLE V

                             Additional Agreements

 SECTION 5.1.  Preparation of Form S-4 and the Information Statement....  A-21
 SECTION 5.2.  Access to Information; Confidentiality...................  A-21
 SECTION 5.3.  Reasonable Efforts; Notification.........................  A-22
 SECTION 5.4.  Employee Stock Purchase Plan.............................  A-22
 SECTION 5.5.  Stock Option Plans.......................................  A-22
 SECTION 5.6.  Benefit Plans and Employee Matters.......................  A-23
 SECTION 5.7.  Indemnification, Exculpation and Insurance...............  A-24
 SECTION 5.8.  Fees and Expenses........................................  A-24
 SECTION 5.9.  Public Announcements.....................................  A-24
 SECTION 5.10. Affiliates; Accounting and Tax Treatment.................  A-24
 SECTION 5.11. State Takeover Laws......................................  A-25

                                   ARTICLE VI

                              Conditions Precedent

 SECTION 6.1.  Conditions to Each Party's Obligations to Effect the
               Merger...................................................  A-25
 SECTION 6.2.  Additional Conditions to Obligations of Parent and Sub...  A-26
 SECTION 6.3.  Additional Conditions to Obligations of the Company......  A-26
</TABLE>

                                     - i -
<PAGE>

                                  ARTICLE VII

                       Termination, Amendment and Waiver

<TABLE>
<CAPTION>
                                                                            Page
                                                                            ----
 <C>            <S>                                                         <C>
 SECTION 7.1.   Termination...............................................  A-27
 SECTION 7.2.   Effect of Termination.....................................  A-28
 SECTION 7.3.   Amendment.................................................  A-28
 SECTION 7.4.   Extension; Waiver.........................................  A-28

                                  ARTICLE VIII

                               General Provisions

 SECTION 8.1.   Nonsurvival of Representations and Warranties.............  A-29
 SECTION 8.2.   Notices...................................................  A-29
 SECTION 8.3.   Definitions...............................................  A-30
 SECTION 8.4.   Interpretation............................................  A-30
 SECTION 8.5.   Counterparts..............................................  A-30
 SECTION 8.6.   Entire Agreement; No Third-Party Beneficiaries............  A-30
 SECTION 8.7.   Governing Law.............................................  A-30
 SECTION 8.8.   Assignment................................................  A-30
 SECTION 8.9.   Enforcement...............................................  A-31
 SECTION 8.10.  Severability..............................................  A-31
 EXHIBIT 5.10   FORM OF AFFILIATE LETTER
 EXHIBIT 6.3(d) FORM OF REGISTRATION RIGHTS AGREEMENT
</TABLE>

                                     - ii -
<PAGE>

   AGREEMENT AND PLAN OF MERGER, dated as of April 21, 1999, among DANAHER
CORPORATION, a Delaware corporation ("Parent"), H2O ACQUISITION CORP., a
Delaware corporation ("Sub") and a direct wholly owned subsidiary of Parent,
and HACH COMPANY, a Delaware corporation (the "Company").

   WHEREAS, the respective Boards of Directors of Parent, Sub and the Company
have approved the merger of Sub with and into the Company (the "Merger"), upon
the terms and subject to the conditions set forth in this Agreement and in
accordance with the Delaware General Corporation Law (the "DGCL"), whereby the
issued and outstanding shares of Company Common Stock (as defined in Section
3.1(c)) other than shares to be canceled in accordance with Section 2.1(b),
will be converted into the right to receive shares of common stock, par value
$.01 per share, of Parent ("Parent Common Stock");

   WHEREAS, as an inducement to Parent to enter into this Agreement, certain
significant stockholders of the Company have entered into an agreement with
Parent (the "Stockholders Support Agreement") pursuant to which each
significant stockholder has, among other things, agreed to vote his or her
shares of Company Common Stock in favor of the Merger;

   WHEREAS, contemporaneously with the execution of this Agreement, the
stockholders of the Company representing a majority of the voting power of the
Company have adopted this Agreement by written consent without a meeting
pursuant to Section 228 of the DGCL, the Restated Certificate of Incorporation
of the Company, as amended (the "Restated Certificate of Incorporation"), and
the By-laws of the Company;

   WHEREAS, contemporaneously with the execution of this Agreement, Parent and
certain stockholders of the Company are executing an Agreement and Plan of
Reorganization that provides for the acquisition by Parent of all of the
Company Common Stock held by C&K Enterprises, Ltd., a Delaware corporation, in
exchange for shares of Parent Common Stock, which exchange is intended to be
effected immediately prior to the consummation of the Merger;

   WHEREAS, Parent, Sub and the Company desire to make certain representations,
warranties, covenants and agreements in connection with the Merger and also to
prescribe various conditions to the Merger;

   WHEREAS, for Federal income tax purposes, it is intended that the Merger
shall qualify as a reorganization within the meaning of Section 368(a) of the
Internal Revenue Code of 1986, as amended (the "Code"); and

   WHEREAS, for accounting purposes, it is intended that the Merger shall be
accounted for as a "pooling-of-interests";

   NOW, THEREFORE, in consideration of the representations, warranties,
covenants and agreements contained in this Agreement, the parties agree as
follows:

                                   ARTICLE I

                                   THE MERGER

   SECTION 1.1. The Merger. Upon the terms and subject to the conditions set
forth in this Agreement, and in accordance with the DGCL, Sub shall be merged
with and into the Company at the Effective Time (as hereinafter defined).
Following the Merger, the separate corporate existence of Sub shall cease and
the Company shall continue as the surviving corporation (the "Surviving
Corporation") and shall succeed to and assume all the rights and obligations of
the Company and of Sub in accordance with the DGCL.

   SECTION 1.2. Closing. The closing of the Merger will take place at 10:00
a.m. on a date to be specified by the parties, which shall be no later than the
second business day after satisfaction or waiver of the

                                      A-1
<PAGE>

conditions set forth in Article VI (the "Closing Date"), at the offices of
Wachtell, Lipton, Rosen & Katz, New York, New York, unless another time, date
or place is agreed to in writing by the parties hereto.

   SECTION 1.3. Effective Time. Subject to the provisions of this Agreement, as
soon as practicable on or after the Closing Date, the parties shall file a
certificate of merger or other appropriate documents (in any such case, the
"Certificate of Merger") executed in accordance with the relevant provisions of
the DGCL and shall make all other filings or recordings required under the
DGCL. The Merger shall become effective at such time as the Certificate of
Merger is duly filed with the Delaware Secretary of State, or at such other
time as Sub and the Company shall agree should be specified in the Certificate
of Merger (the date and time of such filing, or such later date or time as may
be set forth therein, being the "Effective Time").

   SECTION 1.4. Effects of the Merger. The Merger shall have the effects set
forth in Section 259 of the DGCL.

   SECTION 1.5. Certificate of Incorporation and By-laws. (a) The certificate
of incorporation of Sub as in effect immediately prior to the Effective Time
shall be the certificate of incorporation of the Surviving Corporation (except
that such certificate of incorporation shall be amended at the Effective Time
to provide that the name of the Surviving Corporation shall be "HACH COMPANY"),
until thereafter changed or amended as provided therein or by applicable law.

   (b) The by-laws of Sub as in effect at the Effective Time shall be the by-
laws of the Surviving Corporation, until thereafter changed or amended as
provided therein or by applicable law.

   SECTION 1.6. Directors. The directors of Sub immediately prior to the
Effective Time shall be the initial directors of the Surviving Corporation,
until the earlier of their resignation or removal or until their respective
successors are duly elected and qualified, as the case may be.

   SECTION 1.7. Officers. The officers of the Company immediately prior to the
Effective Time shall continue as the officers of the Surviving Corporation,
until the earlier of their resignation or removal or until their respective
successors are duly elected and qualified, as the case may be.

                                   ARTICLE II

                EFFECT OF THE MERGER ON THE CAPITAL STOCK OF THE
               CONSTITUENT CORPORATIONS; EXCHANGE OF CERTIFICATES

   SECTION 2.1. Effect on Capital Stock. At the Effective Time, by virtue of
the Merger and without any action on the part of Parent, Sub, the Company, or
the holders of any shares of Company Common Stock or any shares of capital
stock of Sub:

       (a) Capital Stock of Sub. Each share of the capital stock of Sub
  issued and outstanding immediately prior to the Effective Time shall be
  converted into and exchanged for 1.4588948 fully paid and nonassessable
  shares of common stock of the Surviving Corporation; provided, that such
  number shall be appropriately adjusted to take account of any issuances of
  Company Common Stock prior to the Effective Time.

       (b) Cancellation of Treasury Stock; Parent Owned Stock Remains
  Outstanding. Each share of Company Common Stock that is owned by the
  Company or any subsidiary of the Company, and each share of Company Common
  Stock that is owned by Sub, immediately prior to the Effective Time shall
  automatically be canceled and retired without any conversion thereof and no
  consideration shall be delivered with respect thereto. Each share of
  Company Common Stock that is owned by Parent immediately prior to the
  Effective Time shall be converted into and exchanged for one hundred
  thousandth of a fully paid and non assessable share of common stock of the
  Surviving Corporation.

                                      A-2
<PAGE>

      (c) Conversion of Company Common Stock. Each share of Company Common
  Stock issued and outstanding as of the Effective Time, other than shares of
  Company Common Stock to be canceled or to remain outstanding in accordance
  with Section 2.1(b), shall be converted, subject to Section 2.2(e), Section
  7.1(f) and Section 7.1(g), into the right to receive .2987 (the "Exchange
  Ratio") of a share of Parent Common Stock. If, prior to the Effective Time,
  Parent should split or combine the Parent Common Stock, or pay a stock
  dividend or other stock distribution in Parent Common Stock, then the
  Exchange Ratio will be appropriately adjusted to reflect such split,
  combination, dividend or other distribution.

   As of the Effective Time, all of the shares of Company Common Stock
converted into the right to receive Parent Common Stock pursuant to this
Section 2.1(c) shall no longer be outstanding and shall automatically be
canceled and retired and shall cease to exist, and each certificate previously
representing any such shares shall thereafter represent the right to receive a
certificate representing the shares of Parent Common Stock into which such
Company Common Stock was converted in the Merger and, if applicable, cash
payments in lieu of fractional shares of Parent Common Stock pursuant to
Section 2.2(e). The holders of such certificates previously evidencing such
shares of Company Common Stock outstanding immediately prior to the Effective
Time shall cease to have any rights with respect to such shares of Company
Common Stock as of the Effective Time except as otherwise provided herein or by
law. Such certificates previously representing such shares of Company Common
Stock shall be exchanged for certificates representing whole shares of Parent
Common Stock issued in consideration therefor upon the surrender of such
certificates in accordance with the provisions of Section 2.2, without
interest. No fractional share of Parent Common Stock shall be issued, and, in
lieu thereof, a cash payment shall be made pursuant to Section 2.2(e).

   SECTION 2.2. Exchange of Certificates. (a) Exchange Agent. Prior to the
Effective Time, Parent shall enter into an agreement with such bank or trust
company as may be designated by Parent and as shall be reasonably satisfactory
to the Company (the "Exchange Agent"), and, as contemplated by such agreement,
Parent shall deposit, or shall cause to be deposited, with the Exchange Agent
as of the Effective Time (or otherwise when requested by the Exchange Agent
from time to time in order to effect any exchange pursuant to this Section
2.2), for the benefit of the holders of shares of Company Common Stock
converted into the right to receive Parent Common Stock, for exchange in
accordance with this Article II through the Exchange Agent, cash sufficient to
make payments in lieu of fractional shares pursuant to Section 2.2(e), and
certificates representing the shares of Parent Common Stock issuable pursuant
to Section 2.1 in exchange for such outstanding shares of Company Common Stock
(such cash and certificates representing shares of Parent Common Stock,
together with any dividends or distributions with respect to shares represented
by such certificates, being collectively referred to as the "Exchange Fund").
The Exchange Agent shall deliver the Parent Common Stock contemplated to be
issued pursuant to Section 2.1 out of the Exchange Fund. Except as contemplated
by Section 2.2(e), the Exchange Fund shall not be used for any other purpose.

   (b) Exchange Procedure. As soon as reasonably practicable after the
Effective Time, and in no event later than five business days thereafter, the
Exchange Agent shall mail to each holder of record of a certificate or
certificates which immediately prior to the Effective Time represented
outstanding shares of Company Common Stock converted into the right to receive
Parent Common Stock (the "Certificates"), (i) a letter of transmittal in
customary form (which shall specify that delivery shall be effected, and risk
of loss and title to the Certificates shall pass, only upon proper delivery of
the Certificates to the Exchange Agent) and (ii) instructions for use in
effecting the surrender of the Certificates in exchange for certificates
representing shares of Parent Common Stock. Upon surrender of a Certificate for
cancellation to the Exchange Agent, together with such letter of transmittal,
duly executed, and such other documents as may reasonably be required by the
Exchange Agent, the holder of such Certificate shall be entitled to receive in
exchange therefor a certificate evidencing that number of whole shares of
Parent Common Stock which such holder has the right to receive pursuant to this
Agreement in respect of the shares of Company Common Stock formerly evidenced
by such Certificate (after taking into account all shares of Company Common
Stock then held of record by such holder), and a check representing the amount
of any cash in lieu of fractional shares of Parent Common Stock to which such
holder is entitled pursuant to Section 2.2(e) and any dividends or other
distributions to which such holder is entitled pursuant to Section 2.2(c), and
the Certificate so surrendered shall forthwith be canceled.

                                      A-3
<PAGE>

In the event of a transfer of ownership of Company Common Stock which is not
registered in the transfer records of the Company, a certificate representing
the proper number of shares of Parent Common Stock may be issued to a person
other than the person in whose name the Certificate so surrendered is
registered, if such Certificate, accompanied by all documents required to
evidence and effect such transfer, shall be properly endorsed or otherwise be
in proper form for transfer, and the person requesting such payment shall pay
any transfer or other taxes required by reason of the issuance of shares of
Parent Common Stock to a person other than the registered holder of such
Certificate or establish to the reasonable satisfaction of Parent that such tax
has been paid or is not applicable. Until surrendered as contemplated by this
Section 2.2, each Certificate shall be deemed at any time after the Effective
Time to represent only the right to receive upon such surrender a certificate
evidencing whole shares of Parent Common Stock, cash in lieu of any fractional
shares of Parent Common Stock to which such holder is entitled pursuant to
Section 2.2(e) and any dividends or other distributions to which such holder is
entitled pursuant to Section 2.2(c). No interest will be paid or will accrue on
any cash payable pursuant to Section 2.2(c) or 2.2(e).

   (c) Distributions with Respect to Unexchanged Shares. No dividends or other
distributions declared or made after the Effective Time with respect to Parent
Common Stock with a record date after the Effective Time shall be paid to the
holder of any unsurrendered Certificate with respect to the shares of Parent
Common Stock represented thereby, and no cash payment in lieu of fractional
shares shall be paid to any such holder pursuant to Section 2.2(e), in each
case until the surrender of such Certificate in accordance with this Article
II. Subject to the effect of applicable escheat laws, following surrender of
such Certificate, there shall be paid to the holder of a certificate
representing whole shares of Parent Common Stock issued in exchange therefor,
without interest, (i) at the time of such surrender, the amount of any cash
payable in lieu of a fractional share of Parent Common Stock to which such
holder is entitled pursuant to Section 2.2(e) and the amount of dividends or
other distributions with a record date after the Effective Time theretofore
paid with respect to such whole shares of Parent Common Stock, and (ii) at the
appropriate payment date, the amount of dividends or other distributions with a
record date after the Effective Time but prior to such surrender and with a
payment date subsequent to such surrender payable with respect to such whole
shares of Parent Common Stock.

   (d) No Further Ownership Rights in Company Stock. All shares of Parent
Common Stock issued upon the surrender for exchange of Certificates in
accordance with the terms of this Article II (including any cash paid pursuant
to Section 2.2(c) or 2.2(e)) shall be deemed to have been issued (and paid) in
full satisfaction of all rights pertaining to the shares of Company Common
Stock theretofore represented by such Certificates, subject, however, to the
Surviving Corporation's obligation to pay any dividends or make any other
distributions with a record date prior to the Effective Time which may have
been declared or made by the Company on such shares of Company Common Stock in
accordance with the terms of this Agreement or prior to the date of this
Agreement and which remain unpaid at the Effective Time and have not been paid
prior to surrender. At the Effective Time, the stock transfer books of the
Company shall be closed, and there shall be no further registrations of
transfers of shares of Company Common Stock thereafter on the records of the
Company. If, after the Effective Time, Certificates are presented to the
Surviving Corporation, Parent or the Exchange Agent for any reason, they shall
be cancelled and exchanged as provided in this Article II.

   (e) No Fractional Shares. No certificates or scrip representing fractional
shares of Parent Common Stock shall be issued upon the surrender for exchange
of Certificates, and such fractional share interests will not entitle the owner
thereof to vote or to any rights of a stockholder of Parent. Each holder who
otherwise would have been entitled to a fraction of a share of Parent Common
Stock shall receive in lieu thereof cash (without interest) in an amount
determined by multiplying the fractional share interest to which such holder
would otherwise be entitled by the closing sale price of a share of Parent
Common Stock on the New York Stock Exchange, Inc. ("NYSE") composite tape on
the last full trading day prior to the Effective Time. No such holder shall be
entitled to dividends, voting rights or any other rights in respect of any
fractional share.

   (f) Termination of Exchange Fund. Any portion of the Exchange Fund that
remains undistributed to the holders of Certificates for twelve months after
the Effective Time shall be delivered to Parent, upon demand, and any holders
of Certificates who have not theretofore complied with this Article II shall
thereafter look only

                                      A-4
<PAGE>

to Parent for the shares of Parent Common Stock, any cash in lieu of fractional
shares of Parent Common Stock and any dividends or distributions with respect
to Parent Common Stock to which they are entitled.

   (g) No Liability. None of Parent, Sub, the Company or the Exchange Agent
shall be liable to any holder of shares of Company Common Stock for any shares
of Parent Common Stock (or dividends or distributions with respect thereto) or
cash from the Exchange Fund delivered to a public official pursuant to any
applicable abandoned property, escheat or similar law. If any Certificates
shall not have been surrendered prior to seven years after the Effective Time
(or immediately prior to such earlier date on which any cash, any cash in lieu
of fractional shares or any dividends or distributions with respect to whole
shares of Parent Common Stock in respect of such Certificate would otherwise
escheat to or become the property of any Governmental Entity (as defined
herein)), any such cash, dividends or distributions in respect of such
Certificate shall, to the extent permitted by applicable laws, become the
property of Parent, free and clear of all claims or interest of any person
previously entitled thereto.

   (h) Withholding Rights. Parent or the Exchange Agent shall be entitled to
deduct and withhold from the consideration otherwise payable pursuant to this
Agreement to any holder of Certificates such amounts as Parent or the Exchange
Agent, as the case may be, is required to deduct and withhold with respect to
the making of such payment under the Code, or any provision of state, local or
foreign tax law. To the extent that amounts are so withheld by Parent or the
Exchange Agent, such withheld amounts shall be treated for all purposes of this
Agreement as having been paid to the holder of the Certificates in respect of
which such deduction and withholding shall have been made by Parent or the
Exchange Agent.

   (i) Investment of Exchange Fund. The Exchange Agent shall invest any cash
included in the Exchange Fund, as directed by Parent, on a daily basis. Any
interest and other income resulting from such investments shall be paid to
Parent.

   (j) Missing Certificates. In the event any Certificate shall have been lost,
stolen or destroyed, upon the making of an affidavit of that fact and the
posting by such person of a bond in such reasonable amount as Parent may direct
as indemnity against any claim that may be made against it with respect to such
Certificate, the Exchange Agent will issue in exchange for such lost, stolen or
destroyed Certificate the shares of Parent Common Stock, dividends and
distributions and cash in lieu of fractional shares deliverable in respect
thereof pursuant to this Agreement.

                                  ARTICLE III

                         REPRESENTATIONS AND WARRANTIES

   SECTION 3.1. Representations and Warranties of the Company. Except as
disclosed by specific reference to the applicable section of the Disclosure
Schedule delivered by the Company to Parent concurrently herewith (the "Company
Disclosure Schedule"), the Company represents and warrants to Parent and Sub as
follows:

     (a) Organization, Standing and Corporate Power. The Company and each of
  its subsidiaries is a corporation duly organized, validly existing and in
  good standing under the laws of the jurisdiction in which it is organized
  and has the requisite corporate power and authority to carry on its
  business as now being conducted. The Company and each of its subsidiaries
  is duly qualified or licensed to do business and is in good standing in
  each jurisdiction in which the nature of its business or the ownership or
  leasing of its properties makes such qualification or licensing necessary,
  other than in such jurisdictions where the failure to be so qualified or
  licensed (individually or in the aggregate) could not reasonably be
  expected to have a material adverse effect on the Company. The Company has
  made available to Parent complete and correct copies of its certificate of
  incorporation and by-laws and the certificates of incorporation and by-laws
  or other organizational documents of its Material Subsidiaries, in each
  case as amended to the date of

                                      A-5
<PAGE>

  this Agreement. For purposes of this Agreement, "Material Subsidiary" means
  each subsidiary of the Company designated as a Material Subsidiary in
  Schedule 3.1(b)(i) of the Company Disclosure Schedule.

     (b) Subsidiaries. Schedule 3.1(b)(i) of the Company Disclosure Schedule
  lists each subsidiary of the Company and its jurisdiction of incorporation
  or organization. All the outstanding shares of capital stock of each such
  subsidiary have been validly issued and are fully paid and nonassessable
  and are owned by the Company, by another subsidiary of the Company or by
  the Company and another such subsidiary, free and clear of all pledges,
  liens, charges, encumbrances and security interests of any kind or nature
  whatsoever (collectively, "Liens"). Except for the capital stock of its
  subsidiaries, the Company does not own, directly or indirectly, any capital
  stock or other ownership interest in any corporation, partnership, joint
  venture or other entity.

     (c) Capital Structure. The authorized capital stock of the Company
  consists of 25,000,000 shares of Common Stock, $1.00 par value (the "Common
  Stock") and 20,000,000 shares of Class A Common Stock, $1.00 par value (the
  "Class A Common Stock" and, with the Common Stock, the "Company Common
  Stock"). At the close of business on April 19, 1999, (i) 9,005,414 shares
  of Common Stock and 8,606,364 shares of Class A Common Stock were issued
  and outstanding, (ii) there were 2,617,539 shares of Common Stock and
  3,016,589 shares of Class A Common Stock held by the Company in its
  treasury, (iii) 315,453 shares of Common Stock and 682,953 shares of Class
  A Common Stock were reserved for issuance upon exercise of outstanding
  Stock Options (as defined in Section 5.5) and (iv) 500,000 shares of Class
  A Common Stock reserved for issuance under the Company's Employee Stock
  Purchase Plan. Except as set forth above, at the close of business on April
  19, 1999, no shares of capital stock or other voting securities of the
  Company were issued, reserved for issuance or outstanding. No subsidiary of
  the Company owns any shares of Company Common Stock. Since April 19, 1999,
  (x) no shares of Company Common Stock have been issued except pursuant to
  Stock Options outstanding on April 19, 1999, and (y) no new Stock Options
  have been issued. There are no outstanding stock appreciation rights of the
  Company which were not granted in tandem with a related Stock Option and no
  outstanding limited stock appreciation rights or other rights to redeem for
  cash options or warrants of, or other equity interests in, the Company. All
  outstanding shares of capital stock of the Company are, and all shares
  which may be issued upon the exercise of Stock Options will be, when
  issued, duly authorized, validly issued, fully paid and nonassessable and
  not subject to preemptive rights. There are no bonds, debentures, notes or
  other indebtedness of the Company having the right to vote (or convertible
  into, or exchangeable for, securities having the right to vote) on any
  matters on which stockholders of the Company may vote. Except for the Stock
  Options described above, of which as of April 21, 1999, 998,406 Stock
  Options were outstanding and 671,739 of such Stock Options were
  exercisable, as of the date of this Agreement, there are no outstanding
  securities, options, warrants, calls, rights, commitments, agreements,
  arrangements or undertakings of any kind to which the Company or any of its
  subsidiaries is a party or by which any of them is bound obligating the
  Company or any of its subsidiaries to issue, deliver or sell, or cause to
  be issued, delivered or sold, additional shares of capital stock or other
  voting securities of the Company or of any of its subsidiaries or
  obligating the Company or any of its subsidiaries to issue, grant, extend
  or enter into any such security, option, warrant, call, right, commitment,
  agreement, arrangement or undertaking. There are no outstanding contractual
  obligations of the Company or any of its subsidiaries to repurchase, redeem
  or otherwise acquire any shares of capital stock (or options to acquire any
  such shares) of the Company or any of its subsidiaries. There are no
  agreements, arrangements or commitments of any character (contingent or
  otherwise) pursuant to which any person is or may be entitled to receive
  any earn-out or similar payment based on the revenues, earnings or
  financial performance of the Company or any of its subsidiaries or assets
  or calculated in accordance therewith. There are no agreements to cause the
  Company or any of its subsidiaries to file a registration statement under
  the Securities Act of 1933 (the "Securities Act") or which otherwise relate
  to the registration of any securities of the Company.

     (d) Authority; Noncontravention. The Company has the requisite corporate
  power and authority to enter into this Agreement and to consummate the
  transactions contemplated hereby. The execution and delivery of this
  Agreement by the Company and the consummation by the Company of the
  transactions

                                      A-6
<PAGE>

  contemplated hereby have been duly authorized by all necessary corporate
  action on the part of the Company and, upon approval by written consent of
  stockholders owning a majority of the outstanding shares of Common Stock,
  no additional approval or vote of the holders of any class or series of the
  Company's securities is necessary to approve this Agreement and the
  transactions contemplated hereby. The Board of Directors of the Company (at
  a meeting duly called and held) has by a unanimous vote of directors (i)
  determined that the Merger is advisable and fair and in the best interests
  of the Company and the Company Stockholders, (ii) approved this Agreement
  and the Merger in accordance with the provisions of the DGCL, and (iii)
  submitted this Agreement to, and recommended the approval and adoption of
  this Agreement and the Merger by, the stockholders of the Company.
  Concurrently with the execution of this Agreement, the holders of a
  majority of the outstanding Common Stock have contemporaneously with the
  execution hereof approved and adopted this Agreement and the Merger by
  written consent without a meeting pursuant to Section 228 of the DGCL and
  the Restated Certificate of Incorporation of the Company, as amended, and
  the Bylaws of the Company. Prior to execution and delivery of the
  Stockholders Support Agreement, the Board of Directors of the Company has
  approved the Stockholders Support Agreement and has taken all necessary
  action to ensure that the provisions of Article 9 of the Restated
  Certificate of Incorporation of the Company shall not apply to this
  Agreement or the Stockholders Support Agreement or the transactions
  contemplated hereby and thereby. This Agreement has been duly executed and
  delivered by the Company and constitutes the valid and binding obligation
  of the Company, enforceable against the Company in accordance with its
  terms. The execution and delivery of this Agreement does not, and the
  consummation of the transactions contemplated hereby and compliance with
  the provisions hereof will not, conflict with, or result in any violation
  of or default (with or without notice or lapse of time, or both) under, or
  require the consent of (or the giving of notice to) a third party with
  respect to, or give rise to a right of termination, cancellation or
  acceleration of any obligation or to loss of a material benefit under, or
  result in the creation of any Lien upon any of the properties or assets of
  the Company or any of its subsidiaries under, (i) the certificate of
  incorporation or by-laws of the Company or the comparable charter or
  organizational documents of any of its subsidiaries, (ii) any loan or
  credit agreement, note, bond, mortgage, indenture, lease or other
  agreement, instrument, permit, concession, franchise or license applicable
  to the Company or any of its subsidiaries or their respective properties or
  assets, or (iii) subject to the governmental filings and other matters
  referred to in the following sentence, any judgment, order, decree,
  statute, laws, ordinance, rule or regulation applicable to the Company or
  any of its subsidiaries or their respective properties or assets, other
  than, in the case of clauses (ii) or (iii), any such conflicts, violations,
  defaults, rights or Liens that individually or in the aggregate could not
  reasonably be expected to (x) have a material adverse effect on the
  Company, (y) impair in any material respect the ability of the Company to
  perform its obligations under this Agreement, or (z) prevent or materially
  delay the consummation of any of the transactions contemplated hereby. No
  consent, approval, order or authorization of, or registration, declaration
  or filing with, any Federal, state or local government or any court,
  administrative or regulatory agency or commission or other governmental
  authority or agency, domestic or foreign (a "Governmental Entity"), is
  required by the Company or any of its subsidiaries in connection with the
  execution and delivery of this Agreement by the Company or the consummation
  by the Company of the transactions contemplated hereby, except for (i) the
  filing with the Federal Trade Commission and the Antitrust Division of the
  Department of Justice (the "Specified Agencies") of a premerger
  notification and report form by the Company under the Hart-Scott-Rodino
  Antitrust Improvements Act of 1976 (the "HSR Act"), (ii) the filing with
  the Securities and Exchange Commission (the "SEC") of (x) the Information
  Statement (as defined in Section 5.1) and (y) such reports under Section
  13(a) of the Securities Exchange Act of 1934, as amended (the "Exchange
  Act"), as may be required in connection with this Agreement and the
  transactions contemplated hereby, (iii) the filing of the Certificate of
  Merger with the Delaware Secretary of State and appropriate documents with
  the relevant authorities of other states in which the Company is qualified
  to do business, and (iv) such other consents, approvals, orders,
  authorizations, registrations, declarations and filings, including under
  the laws of any foreign country in which the Company or any of its
  subsidiaries conducts any business or owns any property or assets, the
  failure of which to be obtained or made could not, individually or in the

                                      A-7
<PAGE>

  aggregate, reasonably be expected to have a material adverse effect on the
  Company or prevent or materially delay the consummation of any of the
  transactions contemplated by this Agreement.

     (e) SEC Documents; Financial Statements. Since January 1, 1996, the
  Company has filed with the SEC all required reports, forms and other
  documents (the "SEC Documents"). As of their respective dates, the SEC
  Documents complied in all material respects with the requirements of the
  Securities Act or the Exchange Act, as the case may be, and the rules and
  regulations of the SEC promulgated thereunder applicable to such SEC
  Documents, and none of the SEC Documents contained any untrue statement of
  a material fact or omitted to state a material fact required to be stated
  therein or necessary in order to make the statements therein, in light of
  the circumstances under which they were made, not misleading. Except to the
  extent that information contained in any SEC Document has been revised or
  superseded by a later-filed SEC Document filed and publicly available prior
  to the date of this Agreement, none of the SEC Documents contains any
  untrue statement of a material fact or omits to state any material fact
  required to be stated therein or necessary in order to make the statements
  therein, in light of the circumstances under which they were made, not
  misleading. The financial statements of the Company included in the SEC
  Documents comply as to form in all material respects with all applicable
  accounting requirements and the published rules and regulations of the SEC
  with respect thereto, have been prepared in accordance with generally
  accepted accounting principles (except, in the case of unaudited
  statements, as permitted by Form 10-Q of the SEC) applied on a consistent
  basis during the periods involved (except as may be indicated in the notes
  thereto) and fairly present the consolidated financial position of the
  Company and its consolidated subsidiaries as of the dates thereof and the
  consolidated results of their operations and cash flows for the periods
  then ended (subject, in the case of unaudited statements, to normal year-
  end audit adjustments). Except as set forth in the SEC Documents filed
  prior to the date of this Agreement (or, with respect to any future
  repetition of this representation, prior to the time of such repetition),
  and except for liabilities and obligations incurred in the ordinary course
  of business consistent with past practice since the date of the most recent
  consolidated balance sheet included in the SEC Documents, neither the
  Company nor any of its subsidiaries has any liabilities or obligations of
  any nature (whether accrued, absolute, contingent or otherwise) required by
  generally accepted accounting principles to be set forth on a consolidated
  balance sheet of the Company and its consolidated subsidiaries or in the
  notes thereto.

     (f) Information Supplied. None of the information supplied or to be
  supplied by the Company specifically for inclusion or incorporation by
  reference in (i) the Form S-4 (as defined in Section 5.1(a)) will, at the
  time the Form S-4 is filed with the SEC, at any time it is amended or
  supplemented or at the time it becomes effective under the Securities Act,
  contain any untrue statement of a material fact or omit to state any
  material fact required to be stated therein or necessary in order to make
  the statements therein, in light of the circumstances under which they are
  made, not misleading or (ii) the Information Statement will, at the date it
  is mailed to the Company's stockholders, contain any untrue statement of a
  material fact or omit to state any material fact required to be stated
  therein or necessary in order to make the statements therein, in light of
  the circumstances under which they are made, not misleading. The
  Information Statement will comply as to form in all material respects with
  the requirements of the Exchange Act and the rules and regulations
  thereunder, except that no representation or warranty is made by the
  Company with respect to statements made or incorporated by reference
  therein based on information supplied by Parent or Sub specifically for
  inclusion or incorporation by reference in the Information Statement.

     (g) Absence of Certain Changes or Events. Except as disclosed in the SEC
  Documents filed prior to the date of this Agreement, since April 30, 1998
  the Company has conducted its business only in the ordinary course
  consistent with prior practice, and there has not been (i) any material
  adverse change in the Company, (ii) except for regular quarterly cash
  dividends, any declaration, setting aside or payment of any dividend or
  other distribution (whether in cash, stock or property) with respect to any
  of the Company's capital stock, (iii) any split, combination or
  reclassification of any of its capital stock or any issuance or the
  authorization of any issuance of any other securities in respect of, in
  lieu of or in substitution for shares of its capital stock, (iv) (x) any
  granting by the Company or any of its subsidiaries to any officer of the
  Company or any of its subsidiaries of any increase in compensation, except
  in the

                                      A-8
<PAGE>

  ordinary course of business consistent with prior practice or as was
  required under employment agreements in effect as of the date of the most
  recent audited financial statements included in the SEC Documents filed
  prior to the date of this Agreement (a list of all such employment
  agreements being set forth in Section 3.1(g) of the Company Disclosure
  Schedule), (y) any granting by the Company or any of its subsidiaries to
  any such officer of any increase in severance or termination pay, except as
  was required under employment, severance or termination agreements in
  effect as of the date of the most recent audited financial statements
  included in the SEC Documents filed prior to the date of this Agreement, or
  (z) any entry into, or renewal or modification of, any employment,
  consulting, severance or termination agreement with any such officer by the
  Company or any of its subsidiaries, (v) any damage, destruction or loss,
  whether or not covered by insurance, that, individually or in the
  aggregate, has or could reasonably be expected to have a material adverse
  effect on the Company, (vi) any change in accounting methods, principles or
  practices by the Company, except insofar as may have been required by a
  change in generally accepted accounting principles or (vii) any agreement
  to do any of the things described in the preceding clauses (i) through
  (vi).

     (h) Litigation. Except as disclosed in the SEC Documents filed prior to
  the date of this Agreement, there is no suit, action, investigation, audit
  or proceeding pending or, to the knowledge of the Company, threatened
  against the Company or any of its subsidiaries that, individually or in the
  aggregate, could reasonably be expected to (i) have a material adverse
  effect on the Company, (ii) impair in any material respect the ability of
  the Company to perform its obligations under this Agreement, or (iii)
  prevent the consummation of any of the transactions contemplated by this
  Agreement, nor is there any judgment, decree, injunction, rule or order of
  any Governmental Entity or arbitrator outstanding against the Company or
  any of its subsidiaries having, or which could reasonably be expected to
  have, any effect referred to in the foregoing clauses (i) through (iii).

     (i) Benefit Plans; ERISA Compliance. (i) For purposes of this Section
  3.1(i), the following terms have the meanings set forth below:

       "Controlled Group Liability" means any and all material liabilities
    (i) under Title IV of ERISA, (ii) under section 302 of ERISA, (iii)
    under sections 412 and 4971 of the Code, (iv) as a result of a failure
    to comply with the continuation coverage requirements of section 601 et
    seq. of ERISA and section 4980B of the Code, and (v) under
    corresponding or similar provisions of foreign laws or regulations,
    other than such liabilities that arise solely out of, or relate solely
    to, the Employee Benefit Plans.

       An "Employee Benefit Plan" means any employee benefit plan, program,
    policy, practices, or other arrangement providing benefits to any
    current or former employee, officer or director of the Company or any
    of its subsidiaries or any beneficiary or dependent thereof that is
    sponsored or maintained by the Company or any of its subsidiaries or to
    which the Company or any of its subsidiaries contributes or is
    obligated to contribute, whether or not written, including without
    limitation any employee welfare benefit plan within the meaning of
    Section 3(1) of ERISA, any employee pension benefit plan within the
    meaning of Section 3(2) of ERISA (whether or not such plan is subject
    to ERISA) and any bonus, incentive, deferred compensation, vacation,
    stock purchase, stock option, severance, employment, change of control
    or fringe benefit plan, program or agreement.

       "ERISA Affiliate" means, with respect to any entity, trade or
    business, any other entity, trade or business that is a member of a
    group described in Section 414(b), (c), (m) or (o) of the Code or
    Section 4001(b)(1) of ERISA that includes the first entity, trade or
    business, or that is a member of the same "controlled group" as the
    first entity, trade or business pursuant to Section 4001(a)(14) of
    ERISA.

       A "Multiemployer Plan" means any "multiemployer plan" within the
    meaning of Section 4001(a)(3) of ERISA.

       A "Plan" means any Employee Benefit Plan other than a Multiemployer
    Plan.


                                      A-9
<PAGE>

       "Withdrawal Liability" means liability to a Multiemployer Plan as a
    result of a complete or partial withdrawal from such Multiemployer
    Plan, as those terms are defined in Part I of Subtitle E of Title IV of
    ERISA.

         (ii) Schedule 3.1(i)(ii) of the Company Disclosure Schedule sets
      forth a true, complete and correct complete list of all material
      Employee Benefit Plans (the "Plan List").

         (iii) With respect to each Plan, the Company has delivered to
      Parent a true, correct and complete copy of to the extent
      applicable: (A) each Plan document and any related trust agreements,
      and insurance contracts and other funding vehicles; (B) the most
      recent Annual Report (Form 5500 Series) and accompanying schedule,
      if any; (C) the current summary plan description and any material
      modifications thereto, if any; (D) the most recent annual financial
      report, if any; (E) the most recent actuarial report, if any; and
      (F) the most recent determination letter from the IRS, if any.
      Except as specifically provided in the foregoing documents delivered
      to Parent, there are no amendments to any Plan that have been
      adopted or approved nor has the Company or any of its subsidiaries
      undertaken to make any such amendments or to adopt or approve any
      new Plan.

         (iv) The Plan List identifies each Plan that is intended to be a
      "qualified plan" within the meaning of Section 401(a) of the Code
      ("Qualified Plans"). The Internal Revenue Service has issued a
      favorable determination letter with respect to each Qualified Plan
      and the related trust that has not been revoked, and to the
      Company's knowledge there are no existing circumstances nor any
      events that have occurred that could adversely affect the qualified
      status of any Qualified Plan or the related trust unless such
      circumstances or events could be cured without any material
      liability to the Company and its subsidiaries. The Plan List
      identifies each Plan which is intended to meet the requirements of
      Code Section 501(c)(9), and each such plan meets such requirements
      in all material respects and provides no disqualified benefits (as
      such term is defined in Code Section 4976(b).

         (v) All contributions required to be made to any Plan by
      applicable law or regulation or by any plan document or other
      contractual undertaking, and all premiums due or payable with
      respect to insurance policies funding any Plan, for any period
      through the date hereof have been timely made or paid in full or, to
      the extent not required to be made or paid on or before the date
      hereof, have been fully reflected on the Company's most recent
      balance sheet included in the SEC Documents filed prior to the date
      hereof. Each Employee Benefit Plan that is an employee welfare
      benefit plan under Section 3(1) of ERISA is either (A) funded
      through an insurance company contract and is not a "welfare benefit
      fund" with the meaning of Section 419 of the Code or (B) unfunded.

         (vi) With respect to each Employee Benefit Plan, the Company and
      its subsidiaries have complied, and are now in compliance, in all
      material respects with all provisions of ERISA, the Code and all
      laws and regulations applicable to such Employee Benefit Plans and
      each Employee Benefit Plan has been administered in all material
      respects in accordance with its terms. There is not now, nor do any
      circumstances exist that could give rise to, any requirement for the
      posting of security with respect to a Plan or the imposition of any
      material lien on the assets of the Company or any of its
      subsidiaries under ERISA or the Code.

         (vii) With respect to each Plan that is subject to Title IV or
      Section 302 of ERISA or Section 412 or 4971 of the Code: (A) there
      does not exist any accumulated funding deficiency within the meaning
      of Section 412 of the Code or Section 302 of ERISA, whether or not
      waived; (B) no reportable event within the meaning of Section
      4043(c) of ERISA for which the 30-day notice requirement has not
      been waived has occurred, and the consummation of the transactions
      contemplated by this agreement will not result in the occurrence of
      any such reportable event; (C) all premiums to the Pension Benefit
      Guaranty Corporation have been timely paid in full; (D) no material
      liability (other than for premiums to the PBGC) under Title

                                      A-10
<PAGE>

      IV of ERISA has been or is expected to be incurred by the Company;
      and (E) the PBGC has not instituted proceedings to terminate any
      such Plan and, to the Company's knowledge, no condition exists that
      presents a material risk that such proceedings will be instituted or
      which would constitute grounds under Section 4042 of ERISA for the
      termination of, or the appointment of a trustee to administer, any
      such Plan.

         (viii) No Employee Benefit Plan is a Multiemployer Plan or a plan
      that has two or more contributing sponsors at least two of whom are
      not under common control, within the meaning of Section 4063 of
      ERISA (a "Multiple Employer Plan"). None of the Company and its
      subsidiaries nor any of their respective ERISA Affiliates has, at
      any time during the last six years, contributed to or been obligated
      to contribute to any Multiemployer Plan or Multiple Employer Plan.
      None of the Company and its subsidiaries nor any ERISA Affiliates
      has incurred any Withdrawal Liability that has not been satisfied in
      full.

         (ix) There does not now exist, nor do any circumstances exist
      that could result in, any Controlled Group Liability that would be a
      material liability of the Company following the Closing. Without
      limiting the generality of the foregoing, neither the Company nor
      any ERISA Affiliate of the Company has engaged in any transaction
      described in Section 4069 or Section 4204 or 4212 of ERISA.

         (x) Except as disclosed in the SEC Reports, the Company has no
      material liability for life, health, medical or other welfare
      benefits to former employees or beneficiaries or dependents thereof,
      except for health continuation coverage as required by Section 4980B
      of the Code or Part 6 of Title I of ERISA and except for coverage
      provided at no expense to the Company.

         (xi) Except as set forth on Schedule 3.1(i)(xi) of the Company
      Disclosure Schedule, neither the execution and delivery of this
      Agreement nor the consummation of the transactions contemplated
      hereby will (either alone or in conjunction with any other event)
      result in, cause the accelerated vesting or delivery of, or increase
      the amount or value of, any payment or benefit to any employee,
      officer or director of the Company or any of its subsidiaries.

         (xii) None of the Company and its subsidiaries nor any other
      person, including any fiduciary, has engaged in any "prohibited
      transaction" (as defined in Section 4975 of the Code or Section 406
      of ERISA), which could subject any of the Employee Benefit Plans or
      their related trusts, the Company, any of its subsidiaries or any
      person that the Company or any of its subsidiaries has an obligation
      to indemnify, to any material tax or penalty imposed under Section
      4975 of the Code or Section 502 of ERISA.

         (xiii) There are no pending or threatened claims (other than
      claims for benefits in the ordinary course), lawsuits or
      arbitrations which have been asserted or instituted, or to Company's
      knowledge, no set of circumstances exists which may reasonably give
      rise to a claim or lawsuit, against the Plans, any fiduciaries
      thereof with respect to their duties to the Plans or the assets of
      any of the trusts under any of the Plans which could reasonably be
      expected to result in any material liability of the Company or any
      of its subsidiaries to the Pension Benefit Guaranty Corporation, the
      Department of Treasury, the Department of Labor, any Multiemployer
      Plan, any Plan or any participant in a Plan.

         (xiv) All Employee Benefit Plans subject to the laws of any
      jurisdiction outside of the United States (i) have been maintained
      in accordance with all applicable requirements, (ii) if they are
      intended to qualify for special tax treatment meet all requirements
      for such treatment, and (iii) if they are intended to be funded
      and/or book-reserved are fully funded and/or book-reserved, as
      appropriate, based upon reasonable actuarial assumptions.

     (j) Taxes. (i) Each of the Company and its subsidiaries has timely filed
  all material Federal, state, local and foreign tax returns and reports
  required to be filed by it through the date hereof and shall timely file
  all such returns and reports required to be filed on or before the
  Effective Time. All such returns and

                                      A-11
<PAGE>

  reports are and will be true, complete and correct in all material
  respects. The Company and each of its subsidiaries has paid and discharged
  (or the Company has paid and discharged on its behalf) all material taxes
  due from them, other than such taxes as are being contested in good faith
  by appropriate proceedings and are adequately reserved for on the most
  recent financial statements contained in the SEC Documents filed prior to
  the date of the Agreement. All taxes payable by the Company and its
  subsidiaries (A) for all taxable periods and portions thereof through the
  date of the most recent financial statements contained in the SEC Documents
  filed prior to the date of this Agreement are properly reflected in
  accordance with generally accepted accounting principles in such financial
  statements, and (B) the unpaid taxes of the Company and its subsidiaries do
  not exceed the amount shown therefor on such financial statements adjusted
  for the passage of time through the Effective Time in accordance with past
  custom and practice of the Company and its subsidiaries in filing their tax
  returns. The Company and each of its subsidiaries has withheld all material
  amounts required to be withheld under applicable tax laws from any
  employee, creditor or other person. There are no material liens for taxes
  upon the assets of the Company or any of its subsidiaries, other than liens
  for current taxes not yet due.

       (ii) Except for taxes being contested in good faith and adequately
    reserved for in the Company's financial statements, no claim or
    deficiency for any taxes has been proposed, threatened, asserted or
    assessed by the IRS or any other taxing authority or agency against the
    Company, or any of its subsidiaries which, if resolved against the
    Company or any of its subsidiaries, could, individually or in the
    aggregate, reasonably be expected to have a material adverse effect
    upon the Company, and no requests for waivers of the time to assess any
    material taxes or file any material tax return or report are pending.
    The Federal income tax returns of the Company and each of its
    subsidiaries consolidated in such returns have been examined by and
    settled with the Internal Revenue Service for all years through fiscal
    year 1995. The Company has made available to Parent true and correct
    copies of all federal, state, local and foreign income tax returns, and
    state and local property and sales tax returns and any other tax
    returns filed by the Company or any of its subsidiaries for any of the
    taxable periods that remains open, as of the date hereof, for
    examination or assessment of tax.

       (iii) Neither the Company nor any of its subsidiaries has made an
    election under Section 341(f) of the Code. The Company is not and has
    never been a United States real property holding corporation within the
    meaning of Section 897 of the Code. Neither the Company nor any of its
    subsidiaries has constituted either a "distributing corporation" or a
    "controlled corporation" in a distribution of stock qualifying for tax-
    free treatment under Section 355 of the Code (x) in the prior 24 month
    period or (y) in a distribution which could otherwise constitute part
    of a "plan" or "series of related transactions" (within the meaning of
    Section 355(e) of the Code) in conjunction with the Merger.

       (iv) Neither the Company nor any of its subsidiaries has any
    liability for material taxes of any person (other than the Company and
    its subsidiaries) under Treasury Regulation Section 1.1502-6 (or any
    comparable provision of state, local or foreign law), by contract or
    otherwise. Neither the Company nor any subsidiary is a party to any
    agreement, understanding or arrangement relating to the allocation or
    sharing of taxes.

       (v) Neither the Company nor any of its subsidiaries has taken or
    agreed to take any action or has any knowledge of any fact or
    circumstance that might prevent or impede the Merger from qualifying as
    a reorganization within the meaning of Section 368(a) of the Code.

       (vi) As used in this Agreement, "taxes" shall include all Federal,
    state, local and foreign income, property, sales, withholding, excise
    and other taxes, of any nature whatsoever (whether payable directly or
    by withholding), together with any interest and penalties, additions to
    tax or additional amounts imposed with respect thereto. Notwithstanding
    the definition of "subsidiary" set forth in Section 8.3 of this
    Agreement, for the purposes of this Section 3.1(j), references to the
    Company and each of its subsidiaries shall also include former
    subsidiaries of the Company for the

                                      A-12
<PAGE>

    periods during which any such corporations were included in any
    consolidated, combined or unitary tax return of the Company.

     (k) No Excess Parachute Payments. Any amount that could be received
  (whether in cash or property or the vesting of property) as a result of any
  of the transactions contemplated by this Agreement by any employee, officer
  or director of the Company or any of its affiliates who is a "disqualified
  individual" (as such term is defined in proposed Treasury Regulation
  Section 1.280G-1) under any employment, severance or termination agreement,
  other compensation arrangement or Benefit Plan currently in effect would
  not be characterized as an "excess parachute payment" (as such term is
  defined in Section 280G(b)(1) of the Code).

     (l) Labor Agreements. Neither the Company nor any of its subsidiaries is
  a party to any collective bargaining agreement or other labor agreement
  with any union or labor organization and, to the knowledge of the Company,
  there is no activity or proceeding of any labor organization (or
  representative thereof) to organize any such employees. The Company and its
  subsidiaries are not subject to any pending or, to the knowledge of the
  Company, threatened (i) material unfair labor practice, employment
  discrimination or other complaint, (ii) strike or lockout or material
  dispute, slowdown or work stoppage or (iii) material claim, suit, action or
  governmental investigation, in respect of which any director, officer,
  employee or agent of the Company or any of its subsidiaries is or may be
  entitled to claim indemnification from the Company or any subsidiary.

     (m) Compliance with Applicable Laws. (i) Each of the Company and its
  subsidiaries has in effect all Federal, state, local and foreign
  governmental approvals, authorizations, certificates, filings, franchises,
  licenses, notices, permits and rights ("Permits") necessary for it to own,
  lease or operate its properties and assets and to carry on its business as
  now conducted, and there has occurred no default under any such Permit,
  except for the lack of Permits and for defaults under Permits which lack or
  default individually or in the aggregate could not reasonably be expected
  to have a material adverse effect on the Company. Except as disclosed in
  the SEC Documents filed prior to the date of this Agreement, the Company
  and its subsidiaries are in compliance with all applicable statutes, laws,
  ordinances, rules, orders and regulations of any Governmental Entity,
  except for noncompliance which individually or in the aggregate could not
  have a material adverse effect on the Company.

       (ii) To the knowledge of the Company, the Company and each of its
    subsidiaries is, and has been, and each of the Company's former
    subsidiaries, while subsidiaries of the Company, was, in compliance in
    all material respects with all applicable Environmental Laws, except
    for noncompliance which individually or in the aggregate could not
    reasonably be expected to have a material adverse effect on the
    Company. The term "Environmental Laws" means any Federal, state, local
    or foreign statute, code, ordinance, rule, regulation, policy,
    guideline, permit, consent, approval, license, judgment, order, writ,
    decree, injunction or other authorization, including the requirement to
    register underground storage tanks, relating to: (A) emissions,
    discharges, releases or threatened releases of Hazardous Material (as
    hereinafter defined) into the environment, including, without
    limitation, into ambient air, soil, sediments, land surface or
    subsurface, buildings or facilities, surface water, groundwater,
    publicly owned treatment works, septic systems or land; or (B) the
    generation, treatment, storage, disposal, use, handling, manufacturing,
    transportation or shipment of Hazardous Material.

       (iii) During the period of ownership or operation by the Company and
    its subsidiaries of any of their respective current or previously owned
    or leased properties, to the knowledge of the Company there have been
    no releases of Hazardous Material in, on, under or affecting such
    properties or any surrounding site, except in each case for those which
    individually or in the aggregate could not reasonably be expected to
    have a material adverse effect on the Company. Prior to the period of
    ownership or operation by the Company and its subsidiaries of any of
    their respective current or previously owned or leased properties, to
    the knowledge of the Company, no Hazardous Material was generated,
    treated, stored, disposed of, used, handled or manufactured at, or
    transported, shipped or

                                      A-13
<PAGE>

    disposed of from, such currently or previously owned or leased
    properties, and there were no releases of Hazardous Material in, on,
    under or affecting any such property or any surrounding site, except in
    each case for those which individually or in the aggregate could not
    reasonably be expected to have a material adverse effect on the
    Company. The term "Hazardous Material" means (A) hazardous materials,
    contaminants, constituents, medical wastes, hazardous or infectious
    wastes and hazardous substances as those terms are defined in the
    following statutes and their implementing regulations: the Hazardous
    Materials Transportation Act, 49 U.S.C. (S) 1801 et seq., the Resource
    Conservation and Recovery Act, 42 U.S.C. (S) 6901 et seq., the
    Comprehensive Environmental Response, Compensation and Liability Act,
    as amended by the Superfund Amendments and Reauthorization Act, 42
    U.S.C. (S) 9601 et seq., the Clean Water Act, 33 U.S.C. (S) 1251 et
    seq. and the Clean Air Act, 42 U.S.C. (S) 7401 et seq., (B) petroleum,
    including crude oil and any fractions thereof, (C) natural gas,
    synthetic gas and any mixtures thereof, (D) asbestos and/or asbestos-
    containing material, and (E) PCBs, or materials or fluids containing
    PCBs in excess of 50 ppm.

     (n) Contracts; Debt Instruments. Except as disclosed in Schedule 3.1(n)
  of the Company Disclosure Schedule or for contracts filed as an exhibit to
  the Company's latest Annual Report on Form 10-K, there is no contract or
  agreement that is material to the business, financial condition or results
  of operations of the Company and its subsidiaries taken as a whole
  ("Material Contract"). Each Material Contract of the Company is valid and
  binding and in full force and effect, and neither the Company nor any of
  its subsidiaries is in violation of or in default under (nor does there
  exist any condition which upon the passage of time or the giving of notice,
  or both, would cause such a violation of or default under) any loan or
  credit agreement, note, bond, mortgage, indenture or lease, or any other
  Material Contract to which it is a party or by which it or any of its
  properties or assets is bound, except for such failures to be valid and
  binding and for violations or defaults that could not, individually or in
  the aggregate, reasonably be expected to result in a material adverse
  effect on the Company. Set forth in Section 3.1(n) of the Company
  Disclosure Schedule is a description of any material changes to the amount
  and terms of the indebtedness of the Company and its subsidiaries as
  described in the Company's Form 10-Q for the quarter ended January 31,
  1999. The Company and its subsidiaries are not, and after the Effective
  Time neither the Surviving Corporation nor Parent will be (by reason of any
  agreement to which the Company is a party), subject to any noncompetition
  or similar restriction on their respective businesses.

     (o) Intellectual Property. Except as could not, individually and in the
  aggregate, reasonably be expected to have a material adverse effect on the
  Company, (i) the Company and each of its subsidiaries owns, has the right
  to acquire or is licensed or otherwise has the right to use (in each case,
  free and clear of any Liens), all Intellectual Property (as defined below)
  used in the conduct of its business as currently conducted, (ii) no claims
  are pending or, to the knowledge of the Company, threatened, that the
  Company or any of its subsidiaries is infringing on or otherwise violating
  the rights of any person with regard to any Intellectual Property, and
  (iii) to the knowledge of the Company, no person is infringing on or
  otherwise violating any right of the Company or any of its subsidiaries
  with respect to any Intellectual Property owned by the Company or its
  subsidiaries. For purposes of this Agreement, "Intellectual Property" shall
  mean patents, copyrights, trademarks (registered or unregistered), service
  marks, brand names, trade dress, trade names, the goodwill associated with
  the foregoing and registrations in any jurisdiction of, and applications in
  any jurisdiction to register, the foregoing; and trade secrets and rights
  in any jurisdiction to limit the use or disclosure thereof by any person.

     (p) Accounting Matters. Neither the Company nor, to its knowledge, any
  of its affiliates has taken or agreed to take any action or has knowledge
  of any fact or circumstance relating to the Company that would prevent
  Parent from accounting for the business combination to be effected by the
  Merger as a pooling-of-interests.

     (q) Opinion of Financial Advisor. The Company has received the opinion
  of Lazard Freres & Co. LLC, dated the date of this Agreement, to the effect
  that, as of such date, the Exchange Ratio to be used in the Merger is fair
  to the Company's stockholders, taken as a whole, from a financial point of
  view, and a copy of such signed opinion will be delivered to Parent as soon
  as practicable.

                                      A-14
<PAGE>

     (r) Brokers. No broker, investment banker, financial advisor or other
  person, other than Lazard Freres & Co. LLC, the fees and expenses of which
  have been disclosed to Parent and will be paid by the Company, is entitled
  to any broker's, finder's, financial advisor's or other similar fee or
  commission in connection with the transactions contemplated by this
  Agreement based upon arrangements made by or on behalf of the Company. The
  Company has separately disclosed to Parent the amount of payment due to
  Lazard Freres & Co. LLC in respect of the Merger. The Company will promptly
  deliver to Parent a complete and correct set of all agreements (and
  amendments thereof) between the Company and Lazard Freres & Co. LLC
  pursuant to which such firm would be entitled to any payment relating to
  the Merger.

     (s) State Takeover Statutes. The Company has taken all requisite action
  to render inapplicable to this Agreement, the Stockholders Support
  Agreement and the transactions contemplated hereby and thereby the
  provisions of Section 203 of the DGCL and such action is effective at the
  date of this Agreement. To the knowledge of the Company, no other state
  takeover statute or similar statute or regulation is applicable to the
  Company or applies to the Merger, this Agreement, the Stockholders Support
  Agreement, or any of the transactions contemplated by this Agreement or the
  Stockholders Support Agreement.

     (t) Year 2000 Compliance. The Company has initiated a review and
  assessment of the Year 2000 Problem (as hereinafter defined), has developed
  a plan for addressing the Year 2000 Problem on a timely basis and has to
  date implemented such plan, except where the Company's failure to do so is
  not reasonably likely to have a material adverse effect on the Company.
  Except as could not reasonably be expected to have a material adverse
  effect on the Company, to the knowledge of the Company none of the assets
  or properties owned or utilized by the Company will fail to perform because
  of the Year 2000 Problem. The term "Year 2000 Problem" means the material
  inability of any hardware, software or process to recognize and correctly
  calculate dates on and after January 1, 2000, or the failure of computer
  systems, products or services to perform any of their intended functions in
  a proper manner in connection with data containing any date on or after
  January 1, 2000.

   SECTION 3.2. Representations and Warranties of Parent and Sub. Except as
disclosed by specific reference to the applicable section of the Disclosure
Schedule delivered by Parent to the Company concurrently herewith (the "Parent
Disclosure Schedule"), Parent and Sub represent and warrant to the Company as
follows:

     (a) Organization, Standing and Corporate Power. Each of Parent and Sub
  is a corporation duly organized, validly existing and in good standing
  under the laws of the jurisdiction in which it is incorporated and has the
  requisite corporate power and authority to carry on its business as now
  being conducted. Each of Parent and Sub is duly qualified or licensed to do
  business and is in good standing in each jurisdiction in which the nature
  of its business or the ownership or leasing of its properties makes such
  qualification or licensing necessary, other than in such jurisdictions
  where the failure to be so qualified or licensed (individually or in the
  aggregate) could not reasonably be expected to have a material adverse
  effect on Parent. Parent has made available to the Company complete and
  correct copies of its certificate of incorporation and by-laws and the
  certificate of incorporation and by-laws of Sub, in each case as amended to
  the date of this Agreement.

     (b) Capital Structure. The authorized capital stock of Parent as of the
  date of this Agreement consists of 300,000,000 shares of Parent Common
  Stock and 15,000,000 shares of preferred stock, without par value. At the
  close of business on April 16, 1999, (i) 135,408,036 shares of Parent
  Common Stock and no shares of preferred stock were issued and outstanding,
  (ii) 11,595,000 shares of Parent Common Stock were held by Parent in its
  treasury, and (iii) 15,000,000 shares of Parent Common Stock were reserved
  for issuance upon exercise of outstanding employee stock options to
  purchase shares of Parent Common Stock. The number of shares of Parent
  Common Stock issuable under this Agreement has been or will be reserved for
  issuance. Except as set forth above, at the close of business on April 16,
  1999, no shares of capital stock or other voting securities of the Parent
  were issued, reserved for issuance or outstanding. All outstanding shares
  of capital stock of Parent are, and all shares which may be issued pursuant
  to this

                                      A-15
<PAGE>

  Agreement will be, when issued, duly authorized, validly issued, fully paid
  and nonassessable and not subject to preemptive rights. As of the date of
  this Agreement, there are no bonds, debentures, notes or other indebtedness
  of Parent having the right to vote (or convertible into, or exchangeable
  for, securities having the right to vote) on any matters on which
  stockholders of Parent may vote. Except as set forth above, as of the date
  of this Agreement, there are no outstanding securities, options, warrants,
  calls, rights, commitments, agreements, arrangements or undertakings of any
  kind to which Parent is a party or by which it is bound obligating Parent
  to issue, deliver or sell, or cause to be issued, delivered or sold,
  additional shares of capital stock or other voting securities or obligating
  Parent to issue, grant, extend or enter into any such security, option,
  warrant, call, right, commitment, agreement, arrangement or undertaking. As
  of the date of this Agreement, there are no outstanding contractual
  obligations of Parent to repurchase, redeem or otherwise acquire any shares
  of its capital stock. As of the date of this Agreement, the authorized
  capital stock of Sub consists of 1,000 shares of common stock, par value
  $.01 per share, of which 100 shares have been validly issued, are fully
  paid and nonassessable and are owned by Parent free and clear of any Liens.

     (c) Authority; Noncontravention. Parent and Sub have the requisite
  corporate power and authority to enter into this Agreement and to
  consummate the transactions contemplated hereby. The execution and delivery
  of this Agreement and the consummation of the transactions contemplated
  hereby have been duly authorized by all necessary corporate action on the
  part of Parent and Sub. This Agreement has been duly executed and delivered
  by Parent and Sub and constitutes a valid and binding obligation of each
  such party, enforceable against each such party in accordance with its
  terms. The execution and delivery of this Agreement does not, and the
  consummation of the transactions contemplated hereby and compliance with
  the provisions hereof will not, conflict with, or result in any violation
  of, or default (with or without notice or lapse of time, or both) under, or
  require the consent of (or the giving notice to) a third party with respect
  to, or give rise to a right of termination, cancellation or acceleration of
  any obligation or to loss of a material benefit under, or result in the
  creation of any Lien upon any of the properties or assets of Parent or any
  of its subsidiaries under, (i) the certificate of incorporation or by-laws
  of Parent or Sub, (ii) any loan or credit agreement, note, bond, mortgage,
  indenture, lease or other agreement, instrument, permit, concession,
  franchise or license applicable to Parent or any of its subsidiaries or
  their respective properties or assets as of the date hereof, or (iii)
  subject to the governmental filings and other matters referred to in the
  following sentence, any judgment, order, decree, statute, law, ordinance,
  rule or regulation applicable to Parent or any of its subsidiaries or their
  respective properties or assets, other than, in the case of clauses (ii) or
  (iii), any such conflicts, violations, defaults, rights or Liens that
  individually or in the aggregate could not reasonably be expected to (x)
  have a material adverse effect on Parent, (y) impair in any material
  respect the ability of Parent and Sub to perform their respective
  obligations under this Agreement, or (z) prevent or materially delay the
  consummation of any of the transactions contemplated hereby. No consent,
  approval, order or authorization of, or registration, declaration or filing
  with any Governmental Entity is required by Parent or any of its
  subsidiaries in connection with the execution and delivery of this
  Agreement or the consummation by Parent or Sub, as the case may be, of any
  of the transactions contemplated hereby, except for (i) the filing with the
  Specified Agencies of a premerger notification and report form under the
  HSR Act, (ii) the filing with the SEC of (x) the Form S-4 and (y) such
  reports under Sections 13(a), 13(d) and 16(a) of the Exchange Act as may be
  required in connection with this Agreement and the transactions
  contemplated hereby, (iii) the filing of the Certificate of Merger with the
  Delaware Secretary of State and appropriate documents with the relevant
  authorities of other states in which the Company is qualified to do
  business, and (iv) such other consents, approvals, orders, authorizations,
  registrations, declarations and filings, including under (x) the laws of
  any foreign country in which the Company or any of its subsidiaries
  conducts any business or owns any property or assets or (y) the "takeover"
  or "blue sky" laws of various states, the failure of which to be obtained
  or made could not, individually or in the aggregate, reasonably be expected
  to have a material adverse effect on Parent or prevent or materially delay
  the consummation of any of the transactions contemplated by this Agreement.


                                      A-16
<PAGE>

     (d) SEC Documents; Financial Statements. Since January 1, 1997, Parent
  has filed with the SEC all required reports and forms and other documents
  (the "Parent SEC Documents"). As of their respective dates, the Parent SEC
  Documents complied in all material respects with the requirements of the
  Securities Act or the Exchange Act, as the case may be, and the rules and
  regulations of the SEC promulgated thereunder applicable to such Parent SEC
  Documents, and none of the Parent SEC Documents contained any untrue
  statement of a material fact or omitted to state a material fact required
  to be stated therein or necessary in order to make the statements therein,
  in light of the circumstances under which they were made, not misleading.
  Except to the extent that information contained in any Parent SEC Document
  has been revised or superseded by a later-filed Parent SEC Document filed
  and publicly available prior to the date of this Agreement, none of the
  Parent SEC Documents contains any untrue statement of a material fact or
  omits to state any material fact required to be stated therein or necessary
  in order to make the statements therein, in light of the circumstances
  under which they were made, not misleading. The financial statements of
  Parent included in the Parent SEC Documents comply as to form in all
  material respects with all applicable accounting requirements and the
  published rules and regulations of the SEC with respect thereto, have been
  prepared in accordance with generally accepted accounting principles
  (except, in the case of unaudited statements, as permitted by Form 10-Q of
  the SEC) applied on a consistent basis during the periods involved (except
  as may be indicated in the notes thereto) and fairly present the
  consolidated financial position of Parent and its consolidated subsidiaries
  as of the dates thereof and the consolidated results of their operations
  and cash flows for the periods then ended (subject, in the case of
  unaudited statements, to normal year-end adjustments). Except as set forth
  in the SEC Documents filed prior to the date of this Agreement (or, with
  respect to any future repetition of this representation, prior to the time
  of such repetition), and except for liabilities and obligations incurred in
  the ordinary course of business consistent with past practice since the
  date of the most recent consolidated balance sheet included in the SEC
  Documents, neither Parent nor any of its subsidiaries has any liabilities
  or obligations of any nature (whether accrued, absolute, contingent or
  otherwise) required by generally accepted accounting principles to be set
  forth on a consolidated balance sheet of Parent and its consolidated
  subsidiaries or in the notes thereto.

     (e) Information Supplied. None of the information supplied or to be
  supplied by Parent or Sub for inclusion or incorporation by reference in
  (i) the Form S-4 will, at the time the Form S-4 is filed with the SEC, at
  any time it is amended or supplemented or at the time it becomes effective
  under the Securities Act, contain any untrue statement of a material fact
  or omit to state any material fact required to be stated therein or
  necessary in order to make the statements therein, in light of the
  circumstances under which they are made, not misleading or (ii) the
  Information Statement will, at the date the Information Statement is mailed
  to the Company's stockholders, contain any untrue statement of a material
  fact or omit to state any material fact required to be stated therein or
  necessary in order to make the statements therein, in light of the
  circumstances under which they are made, not misleading. The Form S-4 will
  comply as to form in all material respects with the requirements of the
  Securities Act and the rules and regulations promulgated thereunder, except
  that no representation or warranty is made by Parent or Sub with respect to
  statements made or incorporated by reference in either the Form S-4 or the
  Information Statement based on information supplied by the Company
  specifically for inclusion or incorporation by reference therein.

     (f) Absence of Certain Changes or Events. Except as disclosed in the
  Parent SEC Documents filed prior to the date of this Agreement, since
  January 1, 1999, Parent has conducted its business only in the ordinary
  course consistent with prior practice and there has not been (i) any
  material adverse change in Parent, (ii) except for regular quarterly cash
  dividends, any declaration, setting aside or payment of any dividend or
  distribution (whether in cash, stock or property) with respect to any of
  Parent's capital stock, (iii) any split, combination or reclassification of
  any of its capital stock or any issuance or the authorization of any
  issuance of any other securities in respect of, in lieu of or in
  substitution for shares of its capital stock, (iv) any damage, destruction
  or loss, whether or not covered by insurance, that has or could reasonably
  be expected to have a material adverse effect on Parent, (v) any change in
  accounting methods, principles or practices by Parent materially affecting
  its assets, liabilities or business except

                                      A-17
<PAGE>

  insofar as may have been required by a change in generally accepted
  accounting principles, or (vi) any agreement to do any of the things
  described in the preceding clauses (i) through (v).

     (g) Litigation. Except as disclosed in the Parent SEC Documents filed
  prior to the date of this Agreement, as of the date of this Agreement there
  is no suit, action or proceeding pending or, to the knowledge of Parent,
  threatened against Parent or any of its subsidiaries that, individually or
  in the aggregate, could reasonably be expected to (i) have a material
  adverse effect on Parent, (ii) impair in any material respect the ability
  of Parent to perform its obligations under this Agreement, or (iii) prevent
  the consummation of any of the transactions contemplated by this Agreement,
  nor is there any judgment, decree, injunction, rule or order of any
  Governmental Entity or arbitrator outstanding against Parent or any of its
  subsidiaries having, or which is reasonably likely to have, any effect
  referred to in the foregoing clauses (i) through (iii).

     (h) Compliance with Applicable Laws. (i) Each of Parent and its
  subsidiaries has in effect all Permits necessary for it to own, lease or
  operate its properties and assets and to carry on its business as now
  conducted, and there has occurred no default under any such Permit, except
  for the lack of Permits and for defaults under Permits which lack or
  default individually or in the aggregate could not reasonably be expected
  to have a material adverse effect on Parent. Except as disclosed in the
  Parent SEC Documents filed prior to the date of this Agreement, Parent and
  its subsidiaries are in compliance with all applicable statutes, laws,
  ordinances, rules, orders and regulations of any Governmental Entity,
  except for possible noncompliance which individually or in the aggregate
  could not reasonably be expected to have a material adverse effect on
  Parent.

       (ii) To the knowledge of Parent, Parent and each of its subsidiaries
    is, and has been, and each of Parent's former subsidiaries, while
    subsidiaries of Parent, was, in compliance in all material respects
    with all applicable Environmental Laws, except for possible
    noncompliance which individually or in the aggregate could not
    reasonably be expected to have a material adverse effect on Parent.

     (i) Accounting Matters; Tax Treatment. Neither Parent nor, to its best
  knowledge, any of its affiliates has taken or agreed to take any action or
  has knowledge of any fact or circumstance relating to Parent that would
  prevent Parent from accounting for the business combination to be effected
  by the Merger as a pooling-of-interests. Neither Parent nor any of its
  subsidiaries has taken or agreed to take any action or has any knowledge of
  any fact or circumstance that might prevent or impede the Merger from
  qualifying as a reorganization within the meaning of Section 368(a) of the
  Code.

     (j) Brokers. No broker, investment banker, financial advisor or other
  person, other than Salomon Smith Barney Inc., the fees and expenses of
  which will be paid by Parent, is entitled to any broker's, finder's,
  financial advisor's or other similar fee or commission in connection with
  the transactions contemplated by this Agreement based upon arrangements
  made by or on behalf of Parent or Sub.

     (k) Interim Operations of Sub. Sub was formed solely for the purpose of
  engaging in the transactions contemplated hereby, has engaged in no other
  business activities and has conducted its operations only as contemplated
  hereby.

                                   ARTICLE IV

                   COVENANTS RELATING TO CONDUCT OF BUSINESS

   SECTION 4.1. Conduct of Business. (a) Conduct of Business by the
Company. Between the date of this Agreement and the Effective Time, the Company
shall, and shall cause its subsidiaries to, carry on their respective
businesses in the ordinary course consistent with past practice and use all
reasonable efforts to preserve intact their current business organizations,
keep available the services of their current officers and employees and
preserve their relationships with customers, suppliers and others having
business dealings with them. Without limiting the generality of the foregoing,
between the date of this Agreement and the Effective Time, except (a) as
expressly contemplated by this Agreement or (b) as set forth in Section 4.1(a)
of the

                                      A-18
<PAGE>

Company Disclosure Schedule, the Company shall not, and shall not permit any of
its subsidiaries, without the prior written approval of Parent, to:

     (i) (A) declare, set aside or pay (whether in cash, stock, property, or
  otherwise) any dividends on, or make any other distributions in respect of,
  any of its capital stock, other than (x) the Company's regular quarterly
  cash dividends in amounts and with record and payment dates in the ordinary
  course of business consistent with past practice and (y) dividends and
  distributions by any direct or indirect wholly owned subsidiary of the
  Company to its parent, (B) split, combine or reclassify any of its capital
  stock, or issue or authorize the issuance of any other securities in
  respect of, in lieu of or in substitution for shares of its capital stock,
  or (C) purchase, redeem or otherwise acquire any shares of capital stock of
  the Company or any of its subsidiaries or any other securities thereof or
  any rights, warrants or options to acquire any such shares or other
  securities;

     (ii) other than the issuance of Company Common Stock upon the exercise
  of Stock Options outstanding on the date of this Agreement in accordance
  with their present terms or in accordance with the present terms of any
  employment agreements existing on the date of this Agreement and described
  in Section 4.1(a) of the Company Disclosure Schedule, (A) issue, deliver,
  sell, award, pledge, dispose of or otherwise encumber or authorize or
  propose the issuance, delivery, grant, sale, award, pledge or other
  encumbrance (including limitations in voting rights) or authorization of,
  any shares of its capital stock, any other voting securities or any
  securities convertible into, or any rights, warrants or options to acquire,
  any such shares, voting securities or convertible securities, (B) amend or
  otherwise modify the terms of any such rights, warrants or options, or (C)
  accelerate the vesting of any of the Stock Options;

     (iii) amend its certificate of incorporation, by-laws or other
  comparable charter or organizational documents;

     (iv) acquire or agree to acquire (for cash or shares of stock or
  otherwise) (A) by merging or consolidating with, or by purchasing a
  substantial portion of the assets of, or by any other manner, any business
  or any corporation, partnership, joint venture, association or other
  business organization or division thereof or (B) except for capital assets
  consistent with (vii) below, any assets except in the ordinary course of
  business consistent with past practice;

     (v) mortgage or otherwise encumber or subject to any Lien, or sell,
  lease, exchange or otherwise dispose of any of, its properties or assets,
  except for sales of its products in the ordinary course of business
  consistent with past practice;

     (vi) (A) incur any indebtedness for borrowed money (including under
  existing credit facilities) or guarantee any such indebtedness of another
  person, issue or sell any debt securities or warrants or other rights to
  acquire any debt securities of the Company or any of its subsidiaries,
  guarantee any debt securities of another person, enter into any "keep well"
  or other agreement to maintain any financial statement condition of another
  person or enter into any arrangement having the economic effect of any of
  the foregoing, except for the incurrence of indebtedness to finance the
  Company's working capital needs which, in the aggregate, do not exceed
  $1,000,000, provided that the terms of any such indebtedness (including any
  prepayment penalty) shall be subject to the approval of Parent, or (B) make
  any loans, advances or capital contributions to, or investments in, any
  other person, other than to the Company or any direct or indirect wholly
  owned subsidiary of the Company;

     (vii) make or agree to make any capital expenditures except as
  consistent with the Company's Fiscal 1999 and Fiscal 2000 Capital Budget
  previously provided to Parent on a pro rata basis in each of those fiscal
  years;

     (viii) make or rescind any express or deemed election relating to taxes,
  settle or compromise any claim, action, suit, litigation, proceeding,
  arbitration, investigation, audit or controversy relating to taxes, change
  any of its methods of reporting income or deductions for Federal income tax
  purposes except as may be required by applicable law or file any tax return
  or report other than in a manner consistent with past practice;


                                      A-19
<PAGE>

     (ix) pay, discharge or satisfy any claims, liabilities or obligations
  (absolute, accrued, asserted or unasserted, contingent or otherwise), other
  than the payment, discharge or satisfaction, in the ordinary course of
  business consistent with past practice or in accordance with their terms,
  of liabilities reflected or reserved against in the most recent
  consolidated financial statements of the Company included in the SEC
  Documents or incurred in the ordinary course of business consistent with
  past practice;

     (x) (A) increase the rate or terms of compensation payable or to become
  payable generally to any of the Company's directors, officers or employees
  other than in connection with promotions and regular raise cycle increases
  in the ordinary course and in accordance with past practices and after
  consultation with Parent, (B) pay or agree to pay any pension, retirement
  allowance or other employee benefit not provided for by any existing
  Employee Benefit Plan or employment agreement described in the SEC
  Documents filed prior to the date of this Agreement, (C) commit itself to
  any additional pension, profit sharing, bonus, incentive, deferred
  compensation, stock purchase, stock option, stock appreciation right, group
  insurance, severance pay, continuation pay, termination pay, retirement or
  other employee benefit plan, agreement or arrangement, or increase the rate
  or terms of any employee plan or benefit arrangement, (D) enter into any
  employment agreement with or for the benefit of any person, or (E) increase
  the rate of compensation under or otherwise change the terms of any
  existing employment agreement;

     (xi) except in the ordinary course of business consistent with past
  practice, modify, amend or terminate or fail to use reasonable business
  efforts to renew any material contract or agreement to which the Company or
  any subsidiary is a party, or waive, release or assign any material rights
  or claims (including any rights under any confidentiality agreements); or

     (xii) authorize any of, or commit or agree to take any of, the foregoing
  actions.

   (b) Conduct of Business by Parent. During the period from the date of this
Agreement to the Effective Time, Parent shall, and shall cause its subsidiaries
to, carry on their respective businesses in the ordinary course consistent with
past practice and use all reasonable efforts to preserve their relationships
with customers, suppliers and others having business dealings with them;
provided that the foregoing shall not prevent Parent or any of its subsidiaries
from discontinuing or disposing of any part of its assets or business or from
acquiring any assets or businesses or from entering into any financing
transactions if such action is, in the judgment of Parent, desirable in the
conduct of the business of Parent and its subsidiaries. Without limiting the
generality of the foregoing, during the period from the date of this Agreement
to the Effective Time, except as (i) expressly contemplated by this Agreement
or (ii) as set forth in a writing delivered to the Company prior to the
execution hereof, Parent shall not, and shall not permit any of its
subsidiaries to:

     (i) (A) declare, set aside or pay (whether in cash or property) any
  dividends on, or make any other distributions in respect of, any capital
  stock other than dividends and distributions by any direct or indirect
  wholly owned subsidiary of Parent to its parent and except for regular
  quarterly cash dividends (in an amount determined in a manner consistent
  with Parent's past practice) declared by the Board of Directors of Parent
  with customary record and payment dates, or (B) split, combine or
  reclassify any of its capital stock or issue or authorize the issuance of
  any other securities in respect of, in lieu of or in substitution for
  shares of Parent's capital stock;

     (ii) amend its certificate of incorporation (except to increase the
  number of shares authorized), by-laws or other comparable charter or
  organizational documents in a manner which could reasonably be expected to
  be materially adverse to the stockholders of the Company; or

     (iii) authorize, or commit or agree to take any of, the foregoing
  actions.

   (c) Other Actions. The Company and Parent shall not, and shall not permit
any of their respective subsidiaries to, take any action that would result in
(i) any of the representations and warranties of such party set forth in this
Agreement that are qualified as to materiality, becoming untrue or (ii) any of
such representations and warranties that are not so qualified becoming untrue
in any material respect.


                                      A-20
<PAGE>

   SECTION 4.2. No Solicitation. (a) The Company shall not, nor shall it permit
any of its subsidiaries to, nor shall it authorize or permit any officer,
director or employee of, or any investment banker, attorney or other advisor or
representative of, the Company or any of its subsidiaries to, (i) solicit or
initiate, or encourage or facilitate the submission of, any proposal or offer
for a merger or other business combination involving the Company or any of its
subsidiaries or any acquisition of any capital stock of, or any significant
amount of the assets of, the Company or any of its subsidiaries, or (ii)
participate in any discussions or negotiations regarding, or furnish to any
person any information with respect to, or take any other action to facilitate
any inquiries or the making of any proposal that constitutes, or may reasonably
be expected to lead to, any such transaction (other than with respect to, and
in connection with, the Merger and any other transaction contemplated by this
Agreement). The Company shall immediately terminate any currently on-going
discussions with respect to any such transaction and shall request the return
or destruction of any confidential information provided to any other party in
connection with any such discussions during the past 12 months. The Company
shall promptly advise Parent orally and in writing of any request for
information or of any proposal received from any third party relating to the
Company or its securities, including the material terms and conditions of such
request, proposal or inquiry, and the identity of the person making the same.
The Company shall keep Parent informed on a current basis of the status and
details of any such request, proposal or inquiry.

                                   ARTICLE V

                             ADDITIONAL AGREEMENTS

   SECTION 5.1. Preparation of Form S-4 and the Information Statement. As
promptly as practicable after the execution of this Agreement, (i) the Company
shall prepare and file with the SEC on Schedule 14C an information statement
relating to this Agreement, the transactions contemplated hereby and the
approval thereof by written consent of the stockholders of the Company
(together with any amendments and supplements thereof or supplements thereto,
the "Information Statement"), and (ii) Parent shall prepare and file with the
SEC a registration statement on Form S-4 (together with all amendments thereto,
the "Form S-4") in which the Information Statement shall be included as a
prospectus, in connection with the registration under the Securities Act of the
shares of Parent Common Stock to be issued to the stockholders of the Company
pursuant to the Merger. Each of Parent and the Company shall use all reasonable
efforts to cause the Form S-4 to become effective as promptly as practicable,
and shall take all or any action required under any applicable Federal or state
securities laws in connection with the issuance of shares of Parent Common
Stock pursuant to the Merger. Each of Parent and the Company shall furnish all
information concerning itself to the other as the other may reasonably request
in connection with such actions and the preparation of the Form S-4 and
Information Statement. Parent will advise the Company, and (where applicable)
the Company will advise Parent, promptly after receiving from the SEC or any
other Governmental Entity any of the following: (i) notice that the Form S-4
has become effective, (ii) notice of the issuance of any stop order or the
suspension of the qualification of the shares of Parent Common Stock issuable
in connection with the Merger for offering or sale in any jurisdiction, (iii) a
request for amendment of the Form S-4 or the Information Statement, or (iv) SEC
comments to the Form S-4 or the Information Statement or requests for
additional information with respect thereto. As promptly as practicable after
the Form S-4 shall have become effective, the Company shall mail the
Information Statement to its stockholders. Without limiting the foregoing, if
Parent so requests, the Company will take all action necessary in accordance
with applicable law and its Restated Certificate of Incorporation and By-Laws
to convene a meeting of its stockholders to consider and vote upon the approval
and adoption of this Agreement and the transactions contemplated hereby, and to
submit this Agreement to the stockholders of the Company for their approval, or
to solicit a further written consent, in lieu of a stockholders' meeting, of
its stockholders approving and adopting this Agreement and the transactions
contemplated hereby, and the Company and its Board of Directors shall take all
lawful reasonable action to solicit, and use all reasonable efforts to obtain,
such approval, including making any required filings with Governmental
Entities.

   SECTION 5.2. Access to Information; Confidentiality. Subject to any
applicable law and that certain confidentiality agreement executed in 1993, the
general nature of which has been disclosed, the Company shall,

                                      A-21
<PAGE>

and shall cause each of its subsidiaries to, afford to Parent, and to its
officers, employees, accountants, counsel, financial advisers and other
representatives, full access during normal business hours upon receipt of
reasonable prior notice during the period prior to the Effective Time to all of
the Company's properties, books, contracts, commitments, personnel and records
and, during such period, the Company shall, and shall cause each of its
subsidiaries to, furnish promptly to Parent, (a) a copy of each report,
schedule, registration statement and other document filed by it during such
period pursuant to the requirements of Federal or state securities laws and (b)
all other information concerning its business, properties and personnel as
Parent may reasonably request. Except as required by law, Parent will hold, and
will cause its officers, employees, accountants, counsel, financial advisers
and other representatives and affiliates to hold, any confidential information
in accordance with the Confidentiality Agreement between Parent and the Company
executed in connection with the Merger (the "Confidentiality Agreement").

   SECTION 5.3. Reasonable Efforts; Notification. (a) Upon the terms and
subject to the conditions set forth in this Agreement, each of the parties
agrees to use all reasonable efforts to take, or cause to be taken, all
actions, and to do, or cause to be done, and to assist and cooperate with the
other parties in doing, all things necessary, proper or advisable to consummate
and make effective, in the most expeditious manner practicable, the Merger and
the other transactions contemplated by this Agreement, including (i) the making
of all necessary registrations and filings (including filings with Governmental
Entities, if any), (ii) the obtaining of all necessary consents, approvals or
waivers from third parties, and (iii) the execution and delivery of any
additional instruments necessary to consummate the transactions contemplated
by, and to fully carry out the purposes of, this Agreement. Each party shall
promptly notify the other parties of any communication to that party from any
Governmental Entity and permit the other parties to review in advance any
proposed communications to any Governmental Entity. Parent and the Company
shall not (and shall cause their respective affiliates and representatives not
to) participate in any meeting with any Governmental Entity in respect of any
filings, investigation or other inquiry unless it consults with the other party
in advance and, to the extent permitted by such Governmental Entity, gives the
other party the opportunity to attend and participate thereat. Each of the
parties hereto will coordinate and cooperate fully with the other parties
hereto in exchanging such information and providing such assistance as such
other parties may reasonably request in connection with the foregoing and in
seeking early termination of any applicable waiting periods under the HSR Act
or in connection with other required consents. Each of the Company and Parent
agrees to respond promptly to and comply fully with any request for additional
information or documents under the HSR Act. Each party will provide the others
with copies of all correspondence, filings or communications (or memoranda
setting forth the substance thereof) between such party or any of its
representatives, on the one hand, and any Governmental Entity or members of its
staff, on the other hand, with respect to this Agreement and the transactions
contemplated hereby.

   (b) The Company shall give prompt notice to Parent, and Parent shall give
prompt notice to the Company, of (i) any representation or warranty made by it
contained in this Agreement that is qualified as to materiality becoming untrue
or inaccurate in any respect or any such representation or warranty that is not
so qualified becoming untrue or inaccurate in any material respect or (ii) the
failure by it to comply with or satisfy in any material respect any covenant,
condition or agreement to be complied with or satisfied by it under this
Agreement; provided, however, that no such notification shall affect the
representations, warranties, covenants, or agreements of the parties or the
conditions to the obligations of the parties under this Agreement.

   SECTION 5.4. Employee Stock Purchase Plan. The Company shall take all
necessary action so that any offering under the Company's Employee Stock
Purchase Plan that begins before the Effective Time and would otherwise end
after the Effective Time ends before the Effective Time and no such offering
begins after the Effective Time.

   SECTION 5.5. Stock Option Plans. The Company and Parent shall take all
necessary action to provide that, at the Effective Time, and except as provided
in Section 5.4, all outstanding stock options to purchase shares of Company
Common Stock ("Stock Options") heretofore granted under any stock option or
stock appreciation rights plan, program or arrangement of the Company
(collectively, the "Stock Option Plans") will

                                      A-22
<PAGE>

be canceled and retired and shall cease to exist, and that each holder of a
Stock Option, whether or not then exercisable, shall receive with respect to
such Stock Option, without any action on the part of such holder, the number of
whole shares of Parent Common Stock equal to (i) the Fair Value of such Stock
Option (as defined below) divided by (ii) the Average Parent Stock Price (as
defined below), where: the "Fair Value of such Stock Option" is equal to the
product of (x) the number of shares of Company Common Stock subject to such
Stock Option and (y) the excess, if any, of (A) the product of the Exchange
Ratio and the Average Parent Stock Price over (B) the exercise price of such
Stock Option. The Company shall use its reasonable best efforts to receive any
consents necessary to effectuate the foregoing. The Company represents and
warrants that, under the terms of the Stock Option Plans and the Stock Options,
following the Effective Time, no holder of a Stock Option or participant in any
Stock Option Plan shall have any right thereunder to acquire any capital stock
of the Company, Parent or the Surviving Corporation.

   SECTION 5.6. Benefit Plans and Employee Matters. (a) Parent agrees that the
Company will honor, and, from and after the Effective Time, Parent will cause
the Surviving Corporation to honor, in accordance with their respective terms
as in effect on the date hereof, the employment, severance and bonus agreements
and similar arrangements to which the Company is a party and which are set
forth on Sections 3.1(i) and 5.5 of the Company Disclosure Schedule.

   (b) Parent agrees that (i) for the period ending December 31, 1999, the
Surviving Corporation shall continue the compensation and employee benefit and
welfare plans and programs of the Company to the extent practicable as in
effect on the date hereof, and (ii) thereafter the Surviving Corporation shall
provide employees of the Company and its subsidiaries immediately prior to the
Effective Time ("Company Employees") as a whole (A) compensation (including
bonus and incentive awards) programs and plans and (B) employee benefit and
welfare plans, programs, contracts, agreements and policies (including
insurance and pension plans), fringe benefits and vacation policies which are
substantially the same as or not materially less favorable in the aggregate to
such Company Employees than those generally in effect with respect to similarly
situated employees of Parent.

   (c) For all purposes under the employee benefit plans of Parent and its
Affiliates providing benefits after the Effective Time, each Company Employee
shall be credited with his or her years of service with the Company and its
affiliates before the Effective Time, to the same extent as such Company
Employee was entitled, before the Effective Time, to credit for such service
under any similar Employee Benefit Plans (as defined in Section 3.1(i)), except
to the extent such credit would result in a duplication of benefits. In
addition, and without limiting the generality of the foregoing: (i) each
Company Employee shall be immediately eligible to participate, without any
waiting time, in any and all employee benefit plans sponsored by Parent and its
affiliates for the benefit of Company Employees (such plans, collectively, the
"New Plans") to the extent coverage under such New Plan replaces coverage under
a comparable Employee Benefit Plan in which such Company Employee participated
immediately before the Effective Time (such plans, collectively, the "Old
Plans"); and (ii) for purposes of each New Plan providing medical, dental,
pharmaceutical and/or vision benefits to any Company Employee, Parent shall
cause all pre-existing condition exclusions and actively-at-work requirements
of such New Plan to be waived for such employee and his or her covered
dependents to the extent currently applicable to such persons.

   (d) Parent and the Company shall take all steps necessary or appropriate to
terminate the Company's Deferred Compensation Plan on the terms and conditions
set forth in this Section 5.6(d). Parent shall determine which of the Company
Employees who participate in such Deferred Compensation Plan will be eligible
to participate in Parent's Executive Deferred Incentive Program (the "EDIP")
immediately following the Effective Time, and shall offer each such Company
Employee (an "EDIP Participant") the opportunity to elect, not later than the
tenth day after the Effective Time, whether or not such EDIP Participant's
account balance under such Deferred Compensation Plan will be transferred to an
EDIP account for such EDIP Participant as of December 31, 2000. Such Deferred
Compensation Plan shall terminate effective as of December 31, 2000, and the
account balance thereunder as of December 31, 2000 of each participant who is
not an EDIP Participant, as well as the account balance thereunder as of
December 31, 2000 of each EDIP

                                      A-23
<PAGE>

Participant who does not elect to have his or her account balance transferred
as provided in the preceding sentence, shall be paid to such individual in cash
as promptly as possible thereafter.

   SECTION 5.7. Indemnification, Exculpation and Insurance. (a) The certificate
of incorporation and the by-laws of the Surviving Corporation shall contain the
provisions with respect to indemnification and exculpation from liability set
forth in the Company's Restated Certificate of Incorporation and By-laws on the
date of this Agreement, which provisions shall not be amended, repealed or
otherwise modified for a period of six years following the Effective Time in
any manner that would adversely affect the rights thereunder of individuals who
on or prior to the Effective Time were directors, officers, employees or agents
of the Company, unless such modification is required by law. Parent shall cause
the Surviving Corporation to comply with its obligations with respect to the
indemnification provisions contained in the Surviving Corporation's certificate
of incorporation and by-laws.

   (b) For three years following the Effective Time, Parent shall maintain in
effect directors' and officers' liability insurance covering those persons who
are currently covered by the Company's directors' and officers' liability
insurance policy (a copy of which has been heretofore delivered to Parent) (the
"Indemnified Parties") with coverage limits no less favorable than the terms of
such current insurance coverage; provided, however, that in no event shall
Parent be required to expend in any one year an amount in excess of 200% of the
annual premiums currently paid by the Company for such insurance; and provided
further that if the annual premiums of such insurance coverage exceed such
amount, Parent shall be obligated to obtain a policy with the greatest coverage
available for a cost not exceeding such amount.

   (c) In the event Parent, the Surviving Corporation or any of their
successors or assigns (i) consolidates with or merges into any other person and
shall not be the continuing or surviving corporation or entity of such
consolidation or merger or (ii) transfers all or substantially all of its
properties and assets to any person, then and in each such case, proper
provisions shall be made so that the successors and assigns of Parent or the
Surviving Corporation, as the case may be, shall assume the obligations set
forth in this Section 5.7.

   (d) This Section 5.7 shall survive the consummation of the Merger at the
Effective Time, is intended to benefit the Company, Parent, the Surviving
Corporation and the Indemnified Parties, and shall be binding on all successors
and assigns of Parent and the Surviving Corporation.

   SECTION 5.8. Fees and Expenses. All fees and expenses incurred in connection
with the Merger, this Agreement and the transactions contemplated hereby shall
be paid by the party incurring such fees or expenses, whether or not the Merger
is consummated.

   SECTION 5.9. Public Announcements. Parent and Sub, on the one hand, and the
Company, on the other hand, will consult with each other before issuing, and
provide each other the opportunity to review and comment upon, any press
release or other public statements with respect to the transactions
contemplated by this Agreement, including the Merger, and shall not issue any
such press release or make any such public statement prior to such
consultation, except as may be required by applicable law, court process or by
obligations pursuant to any listing agreement with any national securities
exchange. The parties agree that the initial press release to be issued with
respect to the transactions contemplated by this Agreement shall be in the form
heretofore agreed to by the parties.

   SECTION 5.10. Affiliates; Accounting and Tax Treatment. (a) The Company
shall (x) within 30 days after the date of this Agreement, deliver to Parent a
letter identifying all persons who may be deemed affiliates of the Company
under Rule 145 of the Securities Act or otherwise under applicable SEC
accounting releases with respect to pooling-of-interests accounting treatment
and (y) use all reasonable efforts to obtain from each such affiliate, by the
thirtieth day prior to the Effective Time, a written agreement substantially in
the form of Exhibit 5.10 hereto. The Company shall use all reasonable efforts
to obtain such a written agreement as soon as practicable from any person who
may be deemed to have become an affiliate of the Company, after the Company's
delivery of the letter referred to above and prior to the Effective Time.


                                      A-24
<PAGE>

   (b) Each party hereto shall (i) use all reasonable efforts to cause the
Merger to qualify, and shall not take any actions which such party knows or has
reason to know could prevent the Merger from qualifying, for pooling-of-
interests accounting treatment and as a reorganization under the provisions of
Section 368(a) of the Code and (ii) use its reasonable efforts to obtain the
letters from the accountants referred to in Sections 6.2(e) and the opinions of
counsel referred to in Section 6.2(d) and Section 6.3(c).

   (c) The Company shall (i) use all reasonable best efforts to secure the
waiver of any limited stock appreciation rights or other rights to redeem for
cash options or warrants of the Company by each holder thereof and (ii) subject
to the prior consent of Parent, which shall not be unreasonably withheld, take
such other actions as are necessary to cure any facts or circumstances that
could prevent the Merger from qualifying for pooling-of-interests accounting
treatment, including by reissuing "tainted treasury shares" of Company Common
Stock in a manner (including pursuant to any registration statements filed with
the SEC), limited to a number and at a time reasonably acceptable to Parent.

   SECTION 5.11. State Takeover Laws. The Company shall, upon the request of
Parent, take all reasonable steps to assist in any challenge by Parent to the
validity or applicability to the transactions contemplated by this Agreement
and the Stockholder Support Agreement, including the Merger, of any state
takeover law.

                                   ARTICLE VI

                              CONDITIONS PRECEDENT

   SECTION 6.1. Conditions to Each Party's Obligations to Effect the
Merger. The respective obligation of each party to effect the Merger is subject
to the satisfaction or waiver on or prior to the Closing Date of the following
conditions:

     (a) NYSE Listing. The shares of Parent Common Stock issuable to the
  Company's stockholders pursuant to this Agreement shall have been approved
  for listing on the NYSE, subject to official notice of issuance.

     (b) No Injunctions; Litigation. No litigation brought by a Governmental
  Entity shall be pending which seeks to enjoin or prohibit the consummation
  of the Merger, and no temporary restraining order, preliminary or permanent
  injunction or other order issued by any court of competent jurisdiction or
  other legal restraint or prohibition preventing the consummation of the
  Merger shall be in effect.

     (c) Form S-4. The Form S-4 shall have been declared effective by the SEC
  under the Securities Act. No stop order suspending the effectiveness of the
  Form S-4 shall have been issued by the SEC, and no proceedings for that
  purpose shall have been initiated or, to the knowledge of Parent or the
  Company, threatened by the SEC which, in the case of any of the foregoing,
  shall be ongoing.

     (d) HSR Act. The applicable waiting period (and any extension thereof)
  under the HSR Act shall have expired or been terminated.

     (e) Approvals. Other than the filing of merger documents in accordance
  with the DGCL, all authorizations, consents, waivers, orders or approvals
  required to be obtained, and all filings, notices or declarations required
  to be made, by Parent, Sub and the Company prior to the consummation of the
  Merger and the transactions contemplated hereunder shall have been obtained
  from, and made with, all required Governmental Entities except for such
  authorizations, consents, waivers, orders, approvals, filings, notices or
  declarations the failure to obtain or make which would not have a material
  adverse effect, at or after the Effective Time, on the Company or Parent.

     (f) Information Statement. At least twenty calendar days shall have
  elapsed from the mailing of the Information Statement to the stockholders
  of the Company.

                                      A-25
<PAGE>

   SECTION 6.2. Additional Conditions to Obligations of Parent and Sub. The
obligations of Parent and Sub to effect the Merger are also subject to the
following conditions:

     (a) Representations and Warranties. Each of the representations and
  warranties of the Company contained in this Agreement (when read to exclude
  any qualification or exception as to materiality or material adverse
  effect) shall, as of the Closing Date as though made on and as of the
  Closing Date, be true and correct except for such failures to be true and
  correct as could not, individually or in the aggregate, reasonably be
  expected to result in a material adverse effect on the Company or Parent;
  provided that those representations and warranties which address matters
  only as of a particular date shall remain true and correct in all material
  respects (except that where any statement in a representation or warranty
  expressly includes a standard of materiality, such statement shall be true
  and correct in all respects giving effect to such standard) as of such
  date. Parent shall have received a certificate of the Chief Executive
  Officer and Chief Financial Officer of the Company to such effect.

     (b) Agreements and Covenants. The Company shall have performed or
  complied in all material respects with the agreements and covenants
  required by this Agreement to be performed or complied with by it on or
  prior to the Closing Date. Parent shall have received a certificate of the
  Chief Executive Officer and Chief Financial Officer of the Company to such
  effect.

     (c) Consents Under Agreements. The Company shall have obtained the
  consent or approval of each person whose consent or approval shall be
  required in connection with the Merger under all loan or credit agreements,
  notes, mortgages, indentures, leases or other agreements or instruments to
  which it or any of its Material Subsidiaries is a party, except those for
  which failure to obtain such consents and approvals would not have a
  material adverse effect on the Company prior to or after the Effective Time
  or a material adverse effect on Parent after the Effective Time.

     (d) Tax Opinion. Parent shall have received the opinion of Wachtell,
  Lipton, Rosen & Katz, counsel to Parent, dated as of the Closing Date, to
  the effect that, on the basis of facts, representations and assumptions set
  forth in such opinion, the Merger will be treated for Federal income tax
  purposes as a reorganization qualifying under the provisions of Section
  368(a) of the Code. The issuance of such opinion shall be conditioned on
  the receipt of customary representation letters in form and substance
  reasonably acceptable to Wachtell, Lipton, Rosen & Katz.

     (e) Pooling Letter. Parent shall have received from Arthur Andersen LLP,
  as independent auditors of Parent, on the date of the Information Statement
  and on the Closing Date, letters, in each case dated as of such respective
  dates, addressed to Parent, in form and substance reasonably acceptable to
  Parent and to the effect that the business combination to be effected by
  the Merger is required to be accounted for as a pooling-of-interests by
  Parent for purposes of its consolidated financial statements under
  generally accepted accounting principles and applicable SEC rules and
  regulations.

     (f) Affiliate Agreements. Parent shall have received from each person
  who may be deemed to be an affiliate of the Company (under Rule 145 of the
  Securities Act or otherwise under applicable SEC accounting releases with
  respect to pooling-of-interests accounting treatment) on or prior to the
  Closing Date a signed agreement substantially in the form of Exhibit 5.10
  hereto.

   SECTION 6.3. Additional Conditions to Obligations of the Company. The
obligations of the Company to effect the Merger are also subject to the
following conditions:

     (a) Representations and Warranties. Each of the representations and
  warranties of Parent contained in this Agreement (when read to exclude any
  qualification or exception as to materiality or material adverse effect)
  shall, as of the Closing Date as though made on and as of the Closing Date,
  be true and correct, except for such failures to be true and correct as
  could not, individually or in the aggregate, reasonably be expected to
  result in a material adverse effect on Parent; provided that those
  representations

                                      A-26
<PAGE>

  and warranties which address matters only as of a particular date shall
  remain true and correct in all material respects (except that where any
  statement in a representation or warranty expressly includes a standard of
  materiality, such statement shall be true and correct in all respects
  giving effect to such standard) as of such date. The Company shall have
  received a certificate of the Chief Executive Officer and Chief Financial
  Officer of Parent to such effect.

     (b) Agreements and Covenants. Parent shall have performed or complied in
  all material respects with the agreements and covenants required by this
  Agreement to be performed or complied with by it on or prior to the Closing
  Date. The Company shall have received a certificate of the Chief Executive
  Officer and Chief Financial Officer of Parent to such effect.

     (c) Tax Opinion. The Company shall have received the opinion of McBride
  Baker & Coles, counsel to the Company, dated as of the Closing Date, to the
  effect that, on the basis of facts, representations and assumptions set
  forth in such opinion, the Merger will be treated for Federal income tax
  purposes as a reorganization qualifying under the provisions of Section
  368(a) of the Code and that neither the Company nor any of its stockholders
  will recognize any gain or loss for federal income tax purposes as a result
  of the Merger or receipt of the merger consideration (except with respect
  to cash paid in lieu of fractional shares). The issuance of such opinion
  shall be conditioned on the receipt of customary representation letters in
  form and substance reasonably acceptable to McBride Baker & Coles.

     (d) Registration Rights Agreement. Parent shall have executed and
  delivered to the other parties thereto a registration rights agreement in
  the form of Exhibit 6.3(d) hereto.

                                  ARTICLE VII

                       TERMINATION, AMENDMENT AND WAIVER

   SECTION 7.1. Termination. This Agreement may be terminated at any time prior
to the Effective Time, whether before or after approval of matters presented in
connection with the Merger by the stockholders of the Company:

     (a) by mutual written consent of Parent and the Company;

     (b) by Parent, upon a breach of any representation, warranty, covenant
  or agreement on the part of the Company set forth in this Agreement, or if
  any representation or warranty of the Company shall have become untrue, in
  either case such that the conditions set forth in Section 6.2(a) or Section
  6.2(b), as the case may be, would be incapable of being satisfied by
  October 31, 1999;

     (c) by the Company, upon a breach of any representation, warranty,
  covenant or agreement on the part of Parent set forth in this Agreement, or
  if any representation or warranty of Parent shall have become untrue, in
  either case such that the conditions set forth in Section 6.3(a) or Section
  6.3(b), as the case may be, would be incapable of being satisfied by
  October 31, 1999;

     (d) by either Parent or the Company, if any Governmental Entity shall
  have issued an order, decree or ruling or taken any other action
  permanently enjoining, restraining or otherwise prohibiting the
  consummation of the Merger and such order, decree or ruling or other action
  shall have become final and nonappealable;

     (e) by either Parent or the Company, if the Merger shall not have
  occurred by October 31, 1999 unless the failure to consummate the Merger is
  the result of a material breach of any representation, or warranty,
  covenant or agreement set forth in this Agreement by the party seeking to
  terminate this Agreement;

     (f) by the Company, by a vote of a majority of the members of its entire
  Board of Directors, at any time during the two-day period commencing at the
  close of business on the Determination Date (as

                                      A-27
<PAGE>

  defined below), in the event the Average Parent Stock Price (as defined
  below) is less than $57.09; provided, however, that if the Company elects
  to exercise its termination right pursuant to this Section 7.1(f), it shall
  give prompt written notice thereof to Parent, and during the two-day period
  commencing with its receipt of such notice, Parent may elect to increase
  the Exchange Ratio to equal that fraction of a share of Parent Common Stock
  (rounded to four decimal points), the numerator of which is the product of
  $57.09 and the Exchange Ratio (as then in effect) and the denominator of
  which is the Average Parent Stock Price; if Parent makes an election
  contemplated by the above proviso to this Section 7.1(f) within such two-
  day period, it shall give prompt written notice to the Company of such
  election and the revised Exchange Ratio, whereupon no termination shall
  have occurred pursuant to this Section 7.1(f) and this Agreement shall
  remain in effect in accordance with its terms, except that the Exchange
  Ratio shall be fixed at the number determined in accordance with this
  Section 7.1(f) and any references in this Agreement to the "Exchange Ratio"
  shall thereafter be deemed to refer to the Exchange Ratio as so adjusted;
  or

     (g) by Parent, at any time during the two-day period commencing at the
  close of business on the Determination Date, in the event the Average
  Parent Stock Price is greater than $73.41; provided, however, that if
  Parent elects to exercise its termination right pursuant to this Section
  7.1(g), it shall give prompt written notice thereof to the Company, and
  during the two-day period commencing with its receipt of such notice, the
  Company may elect to decrease the Exchange Ratio to equal that fraction of
  a share of Parent Common Stock (rounded to four decimal points), the
  numerator of which is the product of $73.41 and the Exchange Ratio (as then
  in effect) and the denominator of which is the Average Parent Stock Price;
  if the Company makes an election contemplated by the above proviso to this
  Section 7.1(g) within such two-day period, it shall give prompt written
  notice to Parent of such election and the revised Exchange Ratio, whereupon
  no termination shall have occurred pursuant to this Section 7.1(g) and this
  Agreement shall remain in effect in accordance with its terms, except that
  the Exchange Ratio shall be fixed at the number determined in accordance
  with this Section 7.1(g) and any references in this Agreement to the
  "Exchange Ratio" shall thereafter be deemed to refer to the Exchange Ratio
  as so adjusted.

The "Average Parent Stock Price" means the average of the Daily Per Share
Prices (as defined below) for the 15 consecutive trading days ending on the
date the last of the conditions set forth in Section 6.1 shall be satisfied
(or, if such day is not a trading day, ending on the immediately preceding
trading day) (the "Determination Date"). The "Daily Per Share Price" for any
trading day means the daily last sale price for the Parent Common Stock, as
reported on the NYSE Composite Transactions reporting system (as reported in
The Wall Street Journal or, if not reported therein, in another mutually agreed
upon authoritative source) for that day.

   SECTION 7.2. Effect of Termination. In the event of termination of this
Agreement by either the Company or Parent as provided in Section 7.1, this
Agreement shall forthwith become void and have no effect, without any liability
or obligation on the part of Parent, Sub or the Company, other than the
provisions of Section 3.1(r), Section 3.2(j), the last sentence of Section 5.2,
Section 5.8, this Section 7.2 and Article VIII and except to the extent that
such termination results from the willful and material breach by a party of any
of its representations, warranties, covenants or agreements set forth in this
Agreement.

   SECTION 7.3. Amendment. This Agreement may be amended by the parties by
action of their respective boards of directors at any time, provided that there
shall not be made any amendment that by law requires further approval by the
stockholders of the Company without the further approval of such stockholders.
This Agreement may not be amended except by an instrument in writing signed on
behalf of each of the parties.

   SECTION 7.4. Extension; Waiver. At any time prior to the Effective Time, the
parties may (a) extend the time for the performance of any of the obligations
or other acts of the other parties, (b) waive any inaccuracies in the
representations and warranties contained in this Agreement or in any document
delivered pursuant to this Agreement or (c) subject to the proviso of Section
7.3, waive compliance with any of the

                                      A-28
<PAGE>

agreements or conditions contained in this Agreement. Any agreement on the part
of a party to any such extension or waiver shall be valid only if set forth in
an instrument in writing, signed on behalf of such party. The failure of any
party to this Agreement to assert any of its rights under this Agreement or
otherwise shall not constitute a waiver of those rights.

                                  ARTICLE VIII

                               GENERAL PROVISIONS

   SECTION 8.1. Nonsurvival of Representations and Warranties. None of the
representations and warranties in this Agreement or in any instrument delivered
pursuant to this Agreement shall survive the Effective Time. This Section 8.1
shall not limit any covenant or agreement of the parties which by its terms
contemplates performance after the Effective Time of the Merger.

   SECTION 8.2. Notices. All notices, requests, claims, demands and other
communications under this Agreement shall be in writing and shall be deemed
given if delivered personally or sent by overnight courier (providing proof of
delivery) or telecopy (with receipt acknowledged) to the parties at the
following addresses (or at such other address for a party as shall be specified
by like notice):

       (a) if to Parent or Sub, to

             Danaher Corporation
             1250 24th Street, NW
             Washington, D.C. 20037
             Facsimile: (202) 828-0860

             Attention: Patrick W. Allender

             with a copy to:

             Wachtell, Lipton, Rosen & Katz
             51 West 52nd Street
             New York, NY 10019
             Facsimile: (212) 403-2000

             Attention: Trevor S. Norwitz, Esq.

             and a copy to:

             Wilmer, Cutler & Pickering
             2445 "M" Street, NW
             Washington, D.C. 20037-1420
             Facsimile: (202) 663-6363

             Attention: Mark Dewire, Esq.

             if to the Company, to

             Hach Company
             5600 Lindbergh Drive
             P.O. Box 389
             Loveland, CO 80539
             Facsimile: (970) 669-2932

             Attention: Gary R. Dreher

             with a copy to:

             McBride Baker & Coles
             500 West Madison Street, 40th Floor
             Chicago, IL 60661-2511
             Facsimile: (312) 993-9350

             Attention: Robert O. Case, Esq.

                                      A-29
<PAGE>

             and a copy to:

             Sidley & Austin
             One First National Plaza
             Chicago, IL 60603
             Facsimile: (312) 853-7036

             Attention: Thomas A. Cole, Esq.


   SECTION 8.3. Definitions. For purposes of this Agreement:

     (a) an "affiliate" or "Affiliate" of any person means another person
  that directly or indirectly, through one or more intermediaries, controls,
  is controlled by, or is under common control with, such first person;

     (b) "knowledge" means, when used in connection with the Company or
  Parent, knowledge of the individuals listed in Section 8.3 of the Company
  Disclosure Schedule, and, when used in connection with Parent, knowledge of
  the individuals listed in Section 8.3 of the Parent Disclosure Schedule, in
  each case, after due inquiry for such purpose;

     (c) "material adverse change" or "material adverse effect" means, when
  used in connection with the Company or Parent, any change or effect that is
  or could, individually or in the aggregate, reasonably be expected to be
  materially adverse to the business, assets, liabilities, financial
  condition, results of operations or prospects of such party and its
  subsidiaries taken as a whole;

     (d) "person" means an individual, corporation, partnership, joint
  venture, association, trust, unincorporated organization or other entity;
  and

     (e) a "subsidiary" of any person means another person, an amount of the
  voting securities, other voting ownership or voting partnership interests
  of which is sufficient to elect at least a majority of its board of
  directors or other governing body (or, if there are no such voting
  interests, more than 50% of the equity interests of which) is owned
  directly or indirectly by such first person.

   SECTION 8.4. Interpretation. When a reference is made in this Agreement to a
Section, Exhibit or Schedule, such reference shall be to a Section of, or an
Exhibit or Schedule to, this Agreement unless otherwise indicated. The table of
contents and headings contained in this Agreement are for reference purposes
only and shall not affect in any way the meaning or interpretation of this
Agreement. Whenever the words "include," "includes" and "including" are used in
this Agreement, they shall be deemed to be followed by the words "without
limitation."

   SECTION 8.5. Counterparts. This Agreement may be executed in one or more
counterparts, all of which shall be considered one and the same agreement and
shall become effective when one or more counterparts have been signed by each
of the parties and delivered to the other parties.

   SECTION 8.6. Entire Agreement; No Third-Party Beneficiaries. This Agreement
and the Confidentiality Agreement constitute the entire agreement, and
supersede all prior agreements and understandings, both written and oral, among
the parties with respect to the subject matter hereof and thereof and except
for the provisions of Section 5.7, are not intended to confer upon any person
other than the parties hereto any rights or remedies hereunder.

   SECTION 8.7. Governing Law. This Agreement shall be governed by, and
construed in accordance with, the laws of the State of Delaware, regardless of
the laws that might otherwise govern under applicable principles of conflict of
laws thereof.

   SECTION 8.8. Assignment. Neither this Agreement nor any of the rights,
interests or obligations under this Agreement shall be assigned, in whole or in
part, by operation of law or otherwise by any of the parties without the prior
written consent of the other parties. Subject to the preceding sentence, this
Agreement will be binding upon, inure to the benefit of, and be enforceable by,
the parties and their respective successors and assigns.

                                      A-30
<PAGE>

   SECTION 8.9. Enforcement. The parties agree that irreparable damage would
occur in the event that any of the provisions of this Agreement were not
performed in accordance with their specific terms or were otherwise breached.
It is accordingly agreed that the parties shall be entitled to an injunction or
injunctions to prevent breaches of this Agreement and to enforce specifically
the terms and provisions of this Agreement in any court of the United States
located in the State of Delaware or in Delaware state court, this being in
addition to any other remedy to which they are entitled at law or in equity. In
addition, each of the parties hereto (a) consents to submit itself to the
personal jurisdiction of any Federal court located in the State of Delaware or
any Delaware state court in the event any dispute arises out of this Agreement
or any of the transactions contemplated by this Agreement, (b) agrees that it
will not attempt to deny or defeat such personal jurisdiction by motion or
other request for leave from any such court, and (c) agrees that it will not
bring any action relating to this Agreement or any of the transactions
contemplated by this Agreement in any court other than a Federal or state court
sitting in the State of Delaware.

   SECTION 8.10. Severability. If any term or other provision of this Agreement
is invalid, illegal or incapable of being enforced by any rule of law or public
policy, all other conditions and provisions of this Agreement shall
nevertheless remain in full force and effect so long as the economic or legal
substance of the transactions contemplated hereby is not affected in any manner
materially adverse to any party. Upon such determination that any term or other
provision is invalid, illegal or incapable of being enforced, the parties
hereto shall negotiate in good faith to modify this Agreement so as to effect
the original intent of the parties as closely as possible in any acceptable
manner to the end that transactions contemplated hereby are fulfilled to the
extent possible.

   IN WITNESS WHEREOF, Parent, Sub and the Company have caused this Agreement
to be signed by their respective officers thereunto duly authorized, all as of
the date first written above.

       Attest:                            DANAHER CORPORATION

                                             /s/ Patrick W. Allender
                                          By: _________________________________
                                            Name:Patrick W. Allender
                                            Title:Senior Vice President and
                                                   Chief Financial Officer

                                          H2O ACQUISITION CORP.

                                             /s/ Patrick W. Allender
                                          By: _________________________________
                                            Name:Patrick W. Allender
                                            Title:President

                                          HACH COMPANY

                                             /s/ Kathryn C. Hach-Darrow
                                          By: _________________________________
                                            Name:Kathryn C. Hach-Darrow
                                            Title:Chairman

                                      A-31
<PAGE>

                                                                    EXHIBIT 5.10

                            FORM OF AFFILIATE LETTER

Danaher Corporation
1250 24th Street, NW
Washington, D.C. 20037

Ladies and Gentlemen:

   I have been advised that as of the date of this letter I may be deemed to be
an "affiliate" of HACH COMPANY, a Delaware corporation (the "Company"), as the
term "affiliate" is (i) defined within the meaning of Rule 145 of the rules and
regulations (the "Rules and Regulations") of the Securities and Exchange
Commission (the "Commission") under the Securities Act of 1933, as amended (the
"Act"), and/or (ii) used in and for purposes of Accounting Series Releases 130
and 135, as amended, of the Commission. Pursuant to the terms of the Agreement
and Plan of Merger dated as of April 20, 1999 (the "Agreement"), among Danaher
Corporation, a Delaware corporation ("Parent"), H2O Acquisition Corp., a
Delaware corporation ("Sub"), and the Company, Sub will be merged with and into
the Company (the "Merger").

   In connection with the Merger, I am entitled to receive shares of common
stock, par value $.01 per share, of Parent (the "Parent Shares") in exchange
for shares (or options for shares) owned by me of common stock of the Company
(the "Company Shares").

   I represent, warrant and covenant to Parent that in the event I receive any
Parent Shares as a result of the Merger:

     (a) I shall not make any sale, transfer or other disposition of the
  Parent Shares in violation of the Act or the Rules and Regulations.

     (b) I have carefully read this letter and the Agreement and discussed
  the requirements of such documents and other applicable limitations upon my
  ability to sell, transfer or otherwise dispose of Parent Shares, to the
  extent I felt necessary, with my counsel or counsel for the Company.

     (c) I have been advised that the issuance of Parent Shares to me
  pursuant to the Merger has been or will be registered with the Commission
  under the Act on a Registration Statement on Form S-4. However, because I
  have been advised that, at the time the Merger was submitted for a vote of
  the stockholders of the Company, (a) I may be deemed to have been an
  affiliate of the Company, and (b) other than as set forth in the Agreement,
  the distribution by me of the Parent Shares has not been registered under
  the Act, I will not sell, transfer, hedge, encumber or otherwise dispose of
  Parent Shares issued to me in the Merger unless (i) such sale, transfer or
  other disposition is made in conformity with the volume and other
  limitations of Rule 145 promulgated by the Commission under the Act, (ii)
  such sale, transfer or other disposition has been made pursuant to an
  effective registration statement under the Act, or (iii) in the opinion of
  counsel reasonably acceptable to Parent or as described in a "no-action" or
  interpretive letter from the Staff of the Commission, such sale, transfer
  or other disposition is otherwise exempt from registration under the Act.

     (d) I understand that Parent is under no obligation, other than as set
  forth in the Agreement, to register the sale, transfer or other disposition
  of the Parent Shares by me or on my behalf under the Act or to take any
  other action necessary in order to make compliance with an exemption from
  such registration available solely as a result of the Merger.

     (e) I also understand that there will be placed on the Certificates for
  the Parent Shares issued to me, or any substitutions therefor, a legend
  stating in substance:

    THE SHARES REPRESENTED BY THIS CERTIFICATE WERE ISSUED IN A TRANSACTION
    TO WHICH RULE 145 PROMULGATED UNDER THE SECURITIES ACT OF 1933 APPLIES.
    THE SHARES REPRESENTED BY THIS CERTIFICATE MAY ONLY BE TRANSFERRED IN

                                      A-32
<PAGE>

    ACCORDANCE WITH THE TERMS OF AN AGREEMENT BETWEEN THE REGISTERED HOLDER
    HEREOF AND DANAHER CORPORATION, A COPY OF WHICH AGREEMENT IS ON FILE AT
    THE PRINCIPAL OFFICES OF DANAHER CORPORATION.

     (f) I also understand that unless a sale or transfer is made in
  conformity with the provisions of Rule 145, or pursuant to a registration
  statement, Parent reserves the right to put the following legend on the
  certificates issued to my transferee:

    THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
    UNDER THE SECURITIES ACT OF 1933 AND WERE ACQUIRED FROM A PERSON WHO
    RECEIVED SUCH SHARES IN A TRANSACTION TO WHICH RULE 145 PROMULGATED
    UNDER THE SECURITIES ACT OF 1933 APPLIES. THE SHARES HAVE BEEN ACQUIRED
    BY THE HOLDER NOT WITH A VIEW TO, OR FOR RESALE IN CONNECTION WITH, ANY
    DISTRIBUTION THEREOF WITHIN THE MEANING OF THE SECURITIES ACT OF 1933
    AND MAY NOT BE SOLD, PLEDGED OR OTHERWISE TRANSFERRED EXCEPT IN
    ACCORDANCE WITH AN EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE
    SECURITIES ACT OF 1933.

   It is understood and agreed that the legends set forth in paragraphs (e) and
(f) above shall be removed by delivery of substitute certificates without such
legend if the undersigned shall have delivered to Parent a copy of a letter
from the staff of the Commission, or an opinion of counsel reasonably
satisfactory to Parent in form and substance reasonably satisfactory to Parent,
to the effect that such legend is not required for purposes of the Act.

   I further represent to, and covenant with, Parent that I will not, during
the 30 days prior to the Effective Time (as defined in the Agreement), sell,
transfer, hedge, encumber or otherwise dispose or reduce my rights with respect
to the Company Shares or shares of the capital stock of Parent that I may hold
and, furthermore, that I will not sell, transfer, hedge, encumber or otherwise
dispose of or reduce my rights with respect to Parent Shares received by me in
the Merger or any other shares of the capital stock of Parent until after such
time as results covering at least 30 days of combined operations of the Company
and Parent have been published by Parent, in the form of a quarterly earnings
report, an effective registration statement filed with the Commission, a report
to the Commission on Form 10-K, 10-Q, or 8-K, or any other public filing or
announcement which includes such combined results of operations.

   Execution of this letter should not be considered an admission on my part
that I am an "affiliate" of the Company as described in the first paragraph of
this letter, or as a waiver of any rights I may have to object to any claim
that I am such an affiliate on or after the date of this letter.


                                          Very truly yours,

                                          -------------------------------------
                                          Name:

Accepted this        day of
    1999, by

DANAHER CORPORATION

By
 _________________________________
 Name:
 Title:

                                      A-33
<PAGE>

                                                                      APPENDIX B

                         STOCKHOLDERS SUPPORT AGREEMENT

   STOCKHOLDERS SUPPORT AGREEMENT dated as of April 21, 1999, by and among
DANAHER CORPORATION, a Delaware corporation ("Parent"), on the one hand, and
each of KATHRYN C. HACH-DARROW and BRUCE J. HACH (each a "Stockholder" and,
collectively, the "Stockholders"), on the other hand. Each Stockholder is
executing this Agreement in her or his capacity as a stockholder of HACH
COMPANY, a Delaware corporation (the "Company").

   WHEREAS, Parent, H20 ACQUISITION CORP., a Delaware corporation and a wholly
owned subsidiary of Parent ("Sub"), and the Company, are entering into an
Agreement and Plan of Merger (the "Merger Agreement"; capitalized terms used
without definition herein having the meanings ascribed thereto in the Merger
Agreement) under which the Stockholders will receive substantial value for
their interest in the Company;

   WHEREAS, a significant portion of the goodwill and value of the Company
resides in the "Hach" tradename;

   WHEREAS, each Stockholder is a director of the Company, who possesses
significant knowledge and information about and expertise in the Company
Business (as defined below) which is extremely valuable to competitors of the
Company, and accordingly Parent has required as a condition to its willingness
to enter into the Merger Agreement that each Stockholder make, and each
Stockholder has agreed to make, the commitments set forth herein;

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

   Section 1. Agreement to Support Transaction. Until the earlier of the
Effective Time and the termination of this Agreement in accordance with its
terms:

     (a) Each Stockholder hereby agrees that, immediately following the
  execution and delivery of this Agreement and the Merger Agreement, she or
  he shall execute and deliver, or cause to be executed and delivered by the
  record owner of shares beneficially owned by such Stockholder, in
  accordance with Section 228 of the DGCL, the Restated Certificate of
  Incorporation and By-laws of the Company, the Written Consent of
  Stockholders Without a Meeting, in the form attached hereto as Annex A,
  with respect to all shares of Company Common Stock that are owned
  beneficially or of record by such Stockholder or as to which such
  Stockholder has, directly or indirectly, the right to vote or direct the
  voting.

     (b) Each Stockholder hereby further agrees she or he shall, from time to
  time, at the request of Parent, (i) timely execute and deliver (or cause to
  be timely executed and delivered) an additional written consent with
  respect to, or (ii) vote, or cause to be voted, at any meeting of
  stockholders of the Company held prior to the earlier of the Effective Time
  and the termination of this Agreement or at any adjournment or postponement
  thereof, in person or by proxy, all shares of Company Common Stock, and any
  other voting securities of the Company (whether acquired heretofore or
  hereafter), that are beneficially owned by such Stockholder or her or his
  Affiliates or as to which such Stockholder or any of her or his Affiliates
  has, directly or indirectly, the right to vote or direct the voting, in
  favor of approval and adoption of the Merger Agreement and the Merger
  (including as they may be amended by the Board of Directors of the
  Company), and any action required in furtherance thereof and against any
  action or agreement that would result in a material breach of any
  representation, warranty, covenant or obligation of the Company contained
  in the Merger Agreement.

     (c) Other than pursuant to the Merger or with Parent's prior written
  consent, each Stockholder agrees that she or he will not, and will not
  permit any company, trust or other entity controlled by such

                                      B-1
<PAGE>

  Stockholder to, and will not permit any of such Stockholder's Affiliates
  to, contract to sell, sell, pledge, encumber or otherwise transfer or
  dispose of any Company Common Stock beneficially owned by her or him or any
  interest therein or securities convertible thereinto or any voting rights
  with respect thereto without giving Parent prior written notice thereof and
  in any event if such transaction could reasonably be expected to jeopardize
  Parent's ability to account for the Merger as a "pooling of interests."

     (d) Each Stockholder hereby revokes any and all previous proxies with
  respect to such Stockholder's shares of Company Common Stock or any other
  voting securities of the Company.

     (e) Each Stockholder hereby agrees to, will cause any company, trust or
  other entity controlled by such Stockholder to, and will cause such
  Stockholder's Affiliates to, cooperate fully with Parent in connection with
  the Merger Agreement and the transactions contemplated thereby. Each
  Stockholder agrees that neither such Stockholder nor any of her or his
  representatives, agents or Affiliates will, directly or indirectly,
  encourage, solicit or engage in discussions or negotiations with any third
  party (other than Parent) concerning any merger, consolidation, business
  combination, sale of a significant amount of securities or assets or
  similar transaction ("Alternative Transactions") other than the
  transactions contemplated hereby and by the Merger Agreement. Each
  Stockholder shall immediately request that any Person that has received
  directly or indirectly from such Stockholder any confidential information
  involving the Company or any of its Subsidiaries return all copies thereof
  to the Company and shall, and shall cause her or his representatives,
  agents and Affiliates to, terminate all discussions or negotiations with
  any Person with respect to any Alternative Transaction. Each Stockholder
  will notify Parent immediately of any inquiries or proposals with respect
  to any such transaction that are received by, or any such negotiations or
  discussions of which such Stockholder is aware that are sought to be
  initiated with, such Stockholder or any of such Stockholder's Affiliates or
  the Company or any of its Subsidiaries, will advise Parent of the identity
  of any Person proposing any such Alternative Transaction and of the terms
  thereof and shall keep Parent apprised with respect to all matters relating
  thereto.

     (f) Each Stockholder is signing this Agreement solely in her or his
  capacity as a record holder and beneficial owner of shares of Company
  Common Stock and nothing herein shall limit or affect any actions taken by
  a Stockholder in her or his capacity as an officer or director of the
  Company, subject to the provisions of the Merger Agreement.

   Section 2. Rule 145; Pooling Letter. Each Stockholder is on the date hereof
executing, and shall cause each of such Stockholder's Affiliates identified as
Affiliates of the Company on the Company's letter referred to in Section 5.10
of the Merger Agreement to execute by the thirtieth day prior to the Effective
Time, a written agreement in the form attached as Exhibit 5.10 to the Merger
Agreement (relating to compliance with Rule 145 and pooling rules).

   Section 3. Tax Representations. Each Stockholder shall deliver to Parent's
counsel and the Company's counsel, if so requested by such counsel,
respectively, a certificate setting forth such representations as are customary
to be given by shareholders in transactions such as the Merger in connection
with the opinions contemplated by Sections 6.2(d) and 6.3(c) of the Merger
Agreement.

   Section 4. Covenant Not to Compete. (a) Each Stockholder agrees that,
commencing at the Effective Time and continuing until the third anniversary of
the Effective Time, such Stockholder shall not carry on or participate in the
design, manufacture or marketing of laboratory instruments, process analyzers
and test kits for analyzing the properties of water and other aqueous solutions
(any such activities being referred to herein as "Company Business") or in any
business in competition with any Company Business, as conducted by the Company
on the date hereof, in any country in which the Company operates. Each
Stockholder shall not, whether or not for compensation, engage in any Company
Business, or assist or advise any other Person in such Person's conduct of any
Company Business, whether as a director, officer, employee, consultant,
adviser, independent contractor or otherwise; provided, however, that the
Stockholders shall not be prohibited from owning up to five percent (5%) of the
outstanding securities in any Person that is engaged in any Company Business as
a passive investor.

                                      B-2
<PAGE>

   (b) Each Stockholder agrees that, commencing at the Effective Time and
continuing until the fifth anniversary of the Effective Time, such Stockholder
shall not (i) lend or allow such Stockholder's name or reputation to be used in
or to promote any Company Business, other than for the benefit of Parent and
its Affiliates (including the Company); or (ii) solicit, divert or attempt to
divert from Parent and its Affiliates any business constituting, or any
customer of, or any supplier of, any part of the Company Business then
conducted by the Company, Parent or any of their Affiliates.

   Section 5. Covenant Not to Solicit. In addition to the foregoing, each
Stockholder further agrees that such Stockholder shall not, commencing at the
Effective Time and continuing until the fifth anniversary of the Effective
Time, induce or attempt to induce any Person (i) engaged or employed currently
or within the prior 12 months (whether part-time or full-time) by the Company
or any of its Affiliates to leave the employ of or engagement with the Company,
or its Affiliates, as the case may be, or to cease providing the services to or
on behalf of the Company or its Affiliates, as the case may be, then provided
by such Person, or in any other manner seek to engage, employ or contract for
the services of, any such Person (whether or not for compensation) in any
capacity, or (ii) that is then or has been within the prior 12 months a
customer or supplier with respect to any Company Business to interfere, in any
way, directly or indirectly, with the business relationship between the Company
or any of its Affiliates and any such customer.

   Section 6. Representations as to Stock Ownership. Each Stockholder
represents and warrants to Parent that (a) Schedule I hereto sets forth,
opposite such Stockholder's name, the number and type of shares of Company
Common Stock or other securities of the Company of which such Stockholder is
the record or beneficial owner, and (b) such Stockholder is the lawful owner of
such shares, free and clear of all liens, charges, encumbrances, voting
agreements and commitments of every kind, except as may be disclosed on
Schedule I.

   Section 7. Effectiveness and Termination. In the event the Merger Agreement
is terminated in accordance with its terms, this Agreement shall automatically
terminate and be of no further force or effect. Upon such termination, except
for any rights any party may have in respect of any breach by any other party
of its obligations hereunder, none of the parties hereto shall have any further
obligation or liability hereunder.

   Section 8. Miscellaneous.

   (a) Notices, Etc. All notices, requests, demands or other communications
required by or otherwise with respect to this Agreement shall be in writing and
shall be deemed to have been duly given when delivered personally (by courier
service or otherwise) or when delivered by telecopy (with receipt
acknowledged), to Parent at Danaher Corporation, 1250 24th Street, N.W.,
Washington, D.C. 20037, or to any Stockholder at her or his address set forth
in the records of the Company, or to such other address as any such party shall
have designated by notice so given to each other party.

   (b) Amendments, Waivers, Etc. This Agreement may not be amended, changed,
supplemented, waived or otherwise modified or terminated except by an
instrument in writing signed by each party hereto. The failure of any party
hereto to exercise any right, power or remedy provided under this Agreement or
otherwise available in respect hereof at law or in equity, or to insist upon
compliance by any other party hereto with its obligations hereunder, and any
custom or practice of the parties at variance with the terms hereof, shall not
constitute a waiver by such party of its right to exercise any such or other
right, power or remedy or to demand such compliance.

   (c) Successors and Assigns. This Agreement shall be binding upon and shall
inure to the benefit of and be enforceable by the parties and their respective
successors and assigns. Any transfer of shares of Company Common Stock
notwithstanding, the transferor shall remain liable for the performance of all
obligations under this Agreement of transferor. Any transferee of shares of
Company Common Stock permitted pursuant to this Agreement shall take such
shares subject to the provisions of this Agreement and deliver to Parent in
advance of such transfer its signed acknowledgment to such effect.

                                      B-3
<PAGE>

   (d) Entire Agreement This Agreement (together with the Merger Agreement and
the other agreements and documents expressly contemplated hereby and thereby)
embodies the entire agreement and understanding among the parties relating to
the subject matter hereof and supersedes all prior agreements and
understandings relating to such subject matter. There are no representations,
warranties or covenants by the parties hereto relating to such subject matter
other than those expressly set forth in this Agreement and the Merger
Agreement.

   (e) Severability. If any term of this Agreement or the application thereof
to any party or circumstance shall be held invalid or unenforceable to any
extent, the remainder of this Agreement and the application of such term to the
other parties or circumstances shall not be affected thereby and shall be
enforced to the greatest extent permitted by applicable law, provided that, in
such event, the parties shall negotiate in good faith in an attempt to agree to
another provision (in lieu of the term or application held to be invalid or
unenforceable) that will be valid and enforceable and will carry out to the
maximum extent possible the parties' intentions hereunder.

   (f) Remedies. The parties acknowledge that money damages are not an adequate
remedy for violations of this Agreement and that any party may, in its sole
discretion, apply to a court of competent jurisdiction for specific performance
or injunctive or such other relief as such court may deem just and proper in
order to enforce this Agreement or prevent any violation hereof and, to the
extent permitted by applicable law, each party waives any objection to the
imposition of such relief or any requirement for a bond. All rights, powers and
remedies provided under this Agreement or otherwise available in respect hereof
at law or in equity shall be cumulative and not alternative, and the exercise
or beginning of the exercise of any thereof by any party shall not preclude the
simultaneous or later exercise of any other such right, power or remedy by such
party.

   (g) Governing Law; Jurisdiction. This Agreement and all disputes hereunder
shall be governed by and construed and enforced in accordance with the internal
laws of the State of Delaware, without regard to principles of conflicts of
law. Each party hereby irrevocably submits to the exclusive jurisdiction of the
Court of Chancery in the State of Delaware or the United States District Court
of Delaware in any action, suit or proceeding arising in connection with this
Agreement, and agrees that any such action, suit or proceeding shall be brought
only in such court (and waives any objection based on forum non conveniens or
any other objection to venue therein). Each party hereto hereby waives any
right to a trial by jury in connection with any such action, suit or
proceeding.

   (h) Name, Captions, Gender. The name assigned this Agreement and the section
captions used herein are for convenience of reference only and shall not affect
the interpretation or construction hereof. Whenever the context may require,
any pronoun used herein shall include the corresponding masculine, feminine or
neuter forms.

   (i) Counterparts. This Agreement may be executed in any number of
counterparts, each of which shall be deemed to be an original, but all of which
together shall constitute one instrument. Each counterpart may consist of a
number of copies each signed by less than all, but together signed by all, the
parties hereto.

                                      B-4
<PAGE>

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

                                          DANAHER CORPORATION

                                              /s/ Patrick W. Allender
                                          By: _________________________________
                                             Name: Patrick W. Allender
                                             Title:Senior Vice President and
                                                   Chief Financial Officer

                                          STOCKHOLDERS

                                              /s/ Kathryn Hach-Darrow
                                          By: _________________________________
                                             Name: Kathryn Hach-Darrow

                                              /s/ Bruce J. Hach
                                          By: _________________________________
                                             Name: Bruce J. Hach

                                      B-5
<PAGE>

                                                                      Schedule I

                                SHARE OWNERSHIP

<TABLE>
<CAPTION>
                                                         Shares Owned
                                               ---------------------------------
                                                     Shares           Options
                                               ------------------- -------------
                                                                          Class
                                                          Class A           A
                                                Common    Common   Common Common
             Name of Shareholder                 Stock     Stock   Stock  Stock
             -------------------               --------- --------- ------ ------
<S>                                            <C>       <C>       <C>    <C>
Kathryn C. Hach-Darrow........................ 4,546,990 4,541,647      0      0
Bruce J. Hach.................................   238,350   227,514 20,000 54,000
                                               ========= ========= ====== ======
  Total....................................... 4,785,340 4,769,161 20,000 54,000
</TABLE>

                                      B-6
<PAGE>

                                                                      APPENDIX C

                WRITTEN CONSENT OF STOCKHOLDERS OF HACH COMPANY

                           Dated as of April 21, 1999

   Pursuant to the provisions of Section 228 and Section 251 of the General
Corporation Law of the State of Delaware, the undersigned each holding and
having voting power over that number of shares of Common Stock, par value $1.00
per share, of Hach Company, a Delaware corporation (the "Company") and that
number of shares of Class A Common Stock, par value $1.00 per share, of the
Company (together, "Company Common Stock") set forth adjacent to his or her
name below, collectively constituting a majority of the voting power of the
issued and outstanding Company Common Stock, do hereby consent to, approve and
adopt the following resolution:

     WHEREAS, contemporaneously with this resolution, the Board of Directors
  of the Company has determined that the merger (the "Merger") of H2O
  Acquisition Corp., a Delaware corporation ("Merger Sub"), with and into the
  Company is fair and advisable and in the best interest of the Company and
  its stockholders, has approved and adopted the Agreement and Plan of
  Merger, dated as of April 20, 1999, among Danaher Corporation, a Delaware
  corporation ("Parent"), Merger Sub and the Company in the form attached to
  this consent (the "Merger Agreement") and the Merger, and has submitted the
  Merger Agreement to, and recommended the approval and adoption of the
  Merger Agreement and the Merger by, the stockholders of the Company.

     NOW, THEREFORE, BE IT RESOLVED, that the Merger Agreement and the Merger
  be, and they hereby are, consented to, approved and adopted in all
  respects.

This Consent may be executed in one or more counterparts, all of which shall be
considered one and the same instrument.

    /s/ Kathryn C. Hach-Darrow           4,546,990  shares Common Stock
 ------------------------------------    4,541,647  shares Class A Common
   Name: Kathryn C. Hach-Darrow       Stock

    /s/ Bruce J. Hach                      238,350  shares Common Stock
 ------------------------------------      227,514  shares Class A Common
   Name: Bruce J. Hach                Stock

                                      C-1
<PAGE>

                                                                      APPENDIX D

                                    FORM OF
                         REGISTRATION RIGHTS AGREEMENT

   REGISTRATION RIGHTS AGREEMENT, dated as of         , 1999, between DANAHER
CORPORATION, a Delaware corporation ("Parent"), on the one hand, and Kathryn C.
Hach-Darrow (the "Stockholder"), on the other hand.

   WHEREAS, pursuant to an Agreement and Plan of Merger, dated as of April 21,
1999 (the "Merger Agreement"), by and among Parent, H2O Acquisition Corp., a
Delaware corporation ("Merger Sub") and a wholly owned subsidiary of Parent,
and Wilbur Corporation, a Delaware corporation (the "Company"), Merger Sub will
merge (the "Merger") with and into the Company, and pursuant thereto shares of
Common Stock, par value $1.00 per share, of the Company and shares of Class A
Common Stock, par value $1.00 per share, of the Company will be converted into
shares of Common Stock, par value $.01 per share, of Parent ("Common Stock").
Capitalized terms used herein but not otherwise defined herein shall have the
same meaning as in the Merger Agreement.

   NOW, THEREFORE, in consideration of the premises and the mutual agreements
set forth herein, the parties agree as follows:

   1. Registrable Securities. As used herein, "Registrable Securities" shall
mean: (A) the shares of Common Stock to be acquired by the Stockholder at the
effective time of the Merger (the "Effective Time") pursuant to the Merger
Agreement, and (B) any securities of Parent issued or issuable with respect to
any Common Stock referred to in subdivision (A) by way of stock dividend or
stock split or in connection with a combination of shares, recapitalization,
merger, consolidation or other reorganization or otherwise. As to any
particular Registrable Securities, once issued such securities shall cease to
be Registrable Securities when (x) a registration statement with respect to the
sale of such securities shall have become effective under the Securities Act of
1933, as amended, and the rules and regulations promulgated thereunder (the
"Securities Act") and such securities shall have been disposed of in accordance
with such registration statement, (y) they shall have been transferred pursuant
to Rule 144 or Rule 145 (or any successor provision) under the Securities Act
or (z) they shall have ceased to be outstanding.

   2. Registration on Request. (a) Request. During the period commencing on the
Effective Time and ending on the first anniversary of the Effective Time (the
"Registration Period"), the Stockholder shall have the right on one occasion
upon written request (the "Request") to request that Parent effect the
registration under the Securities Act of all or a part of the Registrable
Securities then owned by the Stockholder (but in any event not less than an
aggregate of 500,000 shares of Common Stock, as adjusted to reflect any stock
splits, combinations of shares, reclassifications or comparable transactions,
or such lesser number of shares as shall then constitute all of the Registrable
Securities then owned by the Stockholder taking into account all Registrable
Securities to be included in such registration). Upon receipt of any such
Request, Parent will use all reasonable efforts (subject to Section 4(b)) to
effect such registration of the Registrable Securities which Parent has been so
requested to register in the Request within 60 days after delivery of the
Registration Notice.

   Parent may include in any such registration other securities for sale for
its own account or for the account of any other Person; provided that, if the
managing underwriter (if any) for the offering shall determine that the number
of shares proposed to be offered in such offering would be reasonably likely to
adversely affect such offering, then the securities to be sold by the
Stockholder shall be included in such registration before any securities
proposed to be sold for the account of Parent or any other Person.

   (b) Registration Statement Form. Parent shall effect any registration
requested under this Section 2 by the filing of a registration statement on
such form as Parent may determine; provided that Parent shall not be obligated
to register any securities on a "shelf" registration statement pursuant to Rule
415 under the

                                      D-1
<PAGE>

Securities Act (or any successor provisions of such Act) or otherwise to
register securities on a continuous or delayed basis.

   (c) Expenses. The Stockholder shall bear all reasonably documented out-of-
pocket expenses incurred in connection with any registration which may be
requested under this Section 2, including all registration, filing and New York
Stock Exchange, Inc. fees, all fees and expenses of complying with securities
or blue sky laws, all printing fees and expenses, messenger and delivery
expenses, the fees and disbursements of counsel for the stockholder and the
expenses of any special audits or "comfort" letters required by or incident to
such performance and any fees, commissions, discounts and disbursements of
underwriters. Parent shall bear the fees and expenses of Parent's counsel.

   (d) Selection of Underwriters. The lead managing underwriter for any
registration requested under this Section 2 effected by means of a firm
commitment underwriting shall be selected by Parent, and shall be reasonably
acceptable to the Stockholder.

   3. Registration Procedures. If Parent is required to seek to effect the
registration of Registrable Securities under the Securities Act as provided in
Section 2, Parent will:

     (i) prepare and (within 30 days after the receipt of the Request) file
  with the SEC the requisite registration statement to effect such
  registration and use all reasonable efforts to cause such registration
  statement to become effective, provided that, before filing such
  registration statement or any amendments thereto, Parent will furnish to
  the counsel selected by the Stockholder copies of all such documents
  proposed to be filed, which documents will be subject to the review of such
  counsel before any such filing is made, and Parent will comply with any
  reasonable request made by such counsel to make changes in any information
  contained in such documents relating to the Stockholder;

     (ii) prepare and file with the SEC such amendments and supplements to
  such registration statement and the prospectus used in connection therewith
  as may be reasonably necessary to maintain the effectiveness of such
  registration and to comply with the provisions of the Securities Act with
  respect to the disposition of all securities covered by such registration
  statement until the earliest of (A) the termination of this Agreement
  pursuant to Section 15, (B) such time as all of such securities have been
  disposed of and (C) the date which is 60 days after the date of initial
  effectiveness of such registration statement;

     (iii) furnish to the Stockholder such number of conformed copies of such
  registration statement and of each amendment and supplement thereto (in
  each case including all exhibits), such number of copies of the prospectus
  contained in such registration statements and any supplements thereto and
  any other prospectus filed under Rule 424 under the Securities Act, and
  such other documents, including documents incorporated by reference, as the
  Stockholder may reasonably request;

     (iv) use all reasonable efforts to register or qualify all Registrable
  Securities registered pursuant to such registration statement under such
  other securities or blue sky laws of such jurisdictions as the Stockholder
  shall reasonably request, to keep such registration or qualification in
  effect for so long as such registration statement remains in effect, and
  take any other action which may be reasonably necessary or advisable to
  enable the Stockholder to consummate the disposition in such jurisdictions
  of the securities owned by the Stockholder, except that Parent shall not
  for any such purpose be required to qualify generally to do business as a
  foreign corporation in any jurisdiction wherein it would not but for the
  requirements of this subdivision (iv) be obligated to be so qualified, to
  be subject to taxation or to consent to general service of process in any
  such jurisdiction;

     (v) use all reasonable efforts to cause all Registrable Securities
  covered by such registration statement to be registered with or approved by
  such other governmental agencies or authorities as may be necessary to
  enable the Stockholder to consummate the disposition of such Registrable
  Securities;

                                      D-2
<PAGE>

     (vi) if such registration includes an underwritten public offering,
  furnish to the Stockholder a signed counterpart of (x) an opinion of
  counsel for Parent, dated the date of the closing under the underwriting
  agreement, and (y) a "comfort letter," dated the effective date of such
  registration statement (and a supplement to such "comfort letter" dated the
  date of the closing under the underwriting agreement), signed by the
  independent public accountants who have certified Parent's financial
  statements included in such registration statement, covering substantially
  the same matters with respect to such registration statement (and the
  prospectus included therein) and, in the case of the accountants' letter,
  with respect to events subsequent to the date of such financial statements,
  as are customarily covered in opinions of issuer's counsel and in
  accountants' letters delivered to the underwriters in underwritten public
  offerings of securities and, in the case of the accountants' letter, such
  other financial matters, as the Stockholder (or the underwriters, if any)
  may reasonably request;

     (vii) notify the Stockholder at any time when Parent is aware that a
  prospectus relating to Registrable Securities is required to be delivered
  under the Securities Act, promptly upon becoming aware of the happening of
  any event as a result of which the prospectus included in such registration
  statement, as then in effect, includes an untrue statement of a material
  fact or omits to state any material fact required to be stated therein or
  necessary to make the statements therein not misleading in the light of the
  circumstances under which they were made, and at the request of the
  Stockholder (and subject to Section 4(b)(ii)) as promptly as reasonably
  practicable prepare and furnish to the Stockholder a reasonable number of
  copies of a supplement to or an amendment of such prospectus as may be
  necessary so that, as thereafter delivered to the purchasers of such
  securities, such prospectus shall not include an untrue statement of a
  material fact or omit to state a material fact required to be stated
  therein or necessary to make the statements therein not misleading in light
  of the circumstances under which they were made;

     (viii) otherwise use all reasonable efforts to comply with the
  Securities Act and the Exchange Act and with all applicable rules and
  regulations of the SEC, and not file any amendment or supplement to such
  registration statement or prospectus to which the Stockholder shall have
  reasonably objected on the grounds that such amendment or supplement does
  not comply in all material respects with the requirements of the Securities
  Act;

     (ix) provide a transfer agent and registrar for all Registrable
  Securities covered by such registration statement not later than the
  effective date of such registration statement; and

     (x) use all reasonable efforts to list all Common Stock covered by such
  registration statement on any securities exchange on which any of the
  Common Stock is then listed.

   Parent may require the Stockholder to furnish Parent such information
regarding the Stockholder and the distribution of such securities as Parent may
from time to time reasonably request in writing for the purpose of registering
the Registrable Securities pursuant to a Request hereunder.

   The Stockholder agrees by acquisition of the Registrable Securities that
upon receipt of any notice from Parent of the happening of any event of the
kind described in subdivision (vii) of this Section 3, the Stockholder will
forthwith discontinue its disposition of Registrable Securities pursuant to the
registration statement relating to such Registrable Securities until the
Stockholder's receipt of the copies of the supplemented or amended prospectus
contemplated by subdivision (vii) of this Section 3 and, if so directed by
Parent, will deliver to Parent (at Parent's expense) all copies then in the
Stockholder's possession, other than permanent file copies, of the prospectus
relating to such Registrable Securities current at the time of receipt of such
notice. Any delay pursuant to this paragraph shall toll on a day for day basis
the running of the 60 day period referred to in Section 3(ii) hereof.

   4. (a) Requested Underwritten Offerings. If requested by the underwriters
for any underwritten offering of Registrable Securities by the Stockholder
under a registration requested pursuant to Section 2, Parent and the
Stockholder will enter into a customary underwriting agreement with such
underwriters for such offering, to

                                      D-3
<PAGE>

contain such representations and warranties and such other terms as are
customarily contained in agreements of this type, including, without
limitation, indemnities to the effect and to the extent provided in Section 6.

   (b) Postponement. (i) [RESERVED]

   (ii) Parent may postpone any registration which is requested pursuant to
Section 2 or delivery of a prospectus or supplement or amendment pursuant to
Section 3(vii) if it determines that in view of the advisability of deferring
public disclosure of material corporate developments or other information, the
disclosures required to be made pursuant thereto would not be in the best
interests of Parent at that time. In the event Parent makes any such election,
the Stockholder agrees to keep confidential the fact of such election and any
information provided by Parent in connection therewith. No single postponement
pursuant to this Section 4(b)(ii) of any registration which is requested
pursuant to Section 2 or delivery of a prospectus or supplement or amendment
pursuant to Section 3(vii) shall exceed 90 days and all such postponements
shall not exceed 180 days in the aggregate.

   5. Covenants Relating to Rule 144/145. Parent will prepare and file in a
timely manner, information, documents and reports in compliance with the
Exchange Act so as to comply with the requirements of such Act and the rules
and regulations thereunder. If at any time Parent is not required to file
reports in compliance with either Section 13 or Section 15(d) of the Exchange
Act, Parent at its expense will forthwith, upon the written request of the
Stockholder, make available adequate current public information with respect to
Parent within the meaning of paragraph (c)(2) of Rule 144 under the Securities
Act.

   6. Indemnification. (a) Indemnification by Parent. In the event of any
registration of any Registrable Securities of Parent under the Securities Act,
Parent will indemnify and hold harmless the Stockholder, each other Person who
participates as an underwriter in the offering or sale of such securities and
each other Person who controls any such underwriter within the meaning of the
Securities Act, against any losses, claims, damages or liabilities, joint or
several, to which the Stockholder or any such underwriter or controlling person
may become subject under the Securities Act or otherwise, insofar as such
losses, claims, damages or liabilities (or actions or proceedings, whether
commenced or threatened, in respect thereof) arise out of or are based upon any
untrue statement or alleged untrue statement of any material fact contained in
the registration statement under which such Registrable Securities were
registered under the Securities Act, any preliminary prospectus, final
prospectus or summary prospectus contained therein, or any amendment or
supplement thereto, or any omission or alleged omission to state therein a
material fact required to be stated therein or necessary to make the statements
therein not misleading, and Parent will reimburse the Stockholder and each such
underwriter and controlling person for any legal or any other expenses
reasonably incurred by them in connection with investigating or defending any
such loss, claim, liability, action or proceedings; provided that Parent shall
not be liable in any such case to the extent that any such loss, claim, damage,
liability (or action or proceeding in respect thereof) or expense arises out of
or is based upon (i) an untrue statement or alleged untrue statement or
omission or alleged omission made in such registration statement, any such
preliminary prospectus, final prospectus, summary prospectus, amendment or
supplement in reliance upon and in conformity with written information
furnished to Parent by the Stockholder for use in the preparation thereof, (ii)
the use of any prospectus after such time as the obligation of Parent to keep
the same effective and current has expired, or (iii) the use of any prospectus
after such time as Parent has advised the Stockholder that the filing of a
post-effective amendment or supplement thereto is required, except such
prospectus as so amended or supplemented, and provided further that Parent
shall not be liable to any Person who participates as an underwriter in the
offering or sale of Registrable Securities or any other Person, if any, who
controls such underwriter within the meaning of the Securities Act in any such
case to the extent that any such loss, claim, damage, liability (or action or
proceeding in respect thereof) or expense arises out of the matters described
in (i), (ii) or (iii) above or such Person's failure to send or give a copy of
the final prospectus or supplement to the Persons asserting an untrue statement
or alleged untrue statement or omission or alleged omission at or prior to the
written confirmation of the sale of Registrable Securities to such Person if
such statement or omission was corrected in such final prospectus or
supplement. Such indemnity shall remain in full force and effect regardless of
any investigation made by or on behalf of the Stockholder or any such
underwriter or controlling person and shall survive the transfer of such
securities by the Stockholder.

                                      D-4
<PAGE>

   (b) Indemnification by the Stockholder. Parent may require, as a condition
to including any Registrable Securities of the Stockholder in any registration
statement filed pursuant to Section 2, that Parent shall have received an
undertaking reasonably satisfactory to it from the Stockholder to indemnify and
hold harmless (in the same manner and to the same extent as set forth in
subdivision (a) of this Section 6) Parent, each director and officer of Parent,
and each other Person, if any, who controls Parent, within the meaning of the
Securities Act, with respect to any untrue statement or alleged untrue
statement of a material fact in or omission or alleged omission to state a
material fact from such registration statement, any preliminary prospectus,
final prospectus or summary prospectus contained therein, or any amendment or
supplement thereto, if such untrue statement or alleged untrue statement or
omission or alleged omission was made in reliance upon and in conformity with
written information furnished to Parent by the Stockholder for use in the
preparation of such registration statement, preliminary prospectus, final
prospectus, summary prospectus, amendment or supplement provided, however, that
the Stockholder shall not be liable to the extent that the losses, liabilities
or expenses arise out of or are based upon (i) the use by Parent of any
prospectus after such time as the obligation of Parent to keep the same
effective and current has expired or (ii) the use by Parent of any prospectus
after such time as the Stockholder has advised Parent that the filing of a
post-effective amendment or supplement thereto is required with respect to any
information contained in such prospectus concerning the Stockholder, except
such prospectus as so amended or supplemented. Such indemnity shall remain in
full force and effect regardless of any investigation made by or on behalf of
Parent, or any such director, officer, or controlling person and shall survive
the transfer of such securities by the Stockholder.

   (c) Notices of Claims, etc. Promptly after receipt by an indemnified party
of notice of the commencement of any action or proceeding involving a claim
referred to in the preceding subdivisions of this Section 6, such indemnified
party will, if a claim in respect thereof is to be made against an indemnifying
party, give written notice to the latter of the commencement of such action,
provided that the failure of any indemnified party to give notice as provided
herein shall not relieve the indemnifying party of its obligations under the
preceding subdivisions of this Section 6, except to the extent that the
indemnifying party is actually prejudiced by such failure to give notice. In
case any such action is brought against an indemnified party, unless a conflict
of interest between such indemnified and indemnifying parties exists in respect
of such claim, the indemnifying party shall be entitled to participate in and
to assume the defense thereof, jointly with any other indemnifying party
similarly notified to the extent that it may wish, with counsel reasonably
satisfactory to such indemnified party, and after notice from the indemnifying
party to such indemnified party of its election so to assume the defense
thereof, the indemnifying party shall not be liable to the indemnified party
for any legal or other expenses subsequently incurred by the latter in
connection with the defense thereof other than reasonable costs of
investigation.

   (d) Contribution. If for any reason the foregoing indemnity is unavailable,
or is insufficient to hold harmless an indemnified party, then the indemnifying
party shall contribute to the amount paid or payable by the indemnified party
as a result of the expense, loss, damage or liability, (i) in such proportion
as is appropriate to reflect the relative fault of the indemnifying party on
the one hand and the indemnified party on the other (determined by reference
to, among other things, whether the untrue or alleged untrue statement of a
material fact or omission relates to information supplied by the indemnifying
party or the indemnified party and the parties' relative intent, knowledge,
access to information and opportunity to correct or prevent such untrue
statement or omission), or (ii) if the allocation provided by clause (i) above
is not permitted by applicable law or provides a lesser sum to the indemnified
party than the amount hereinafter calculated, in the proportion as is
appropriate to reflect not only the relative fault of the indemnifying party
and the indemnified party, but also the relative benefits received by the
indemnifying party on the one hand and the indemnified party on the other, as
well as any other relevant equitable considerations. No indemnified party
guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of
the Securities Act) shall be entitled to contribution from any indemnifying
party who was not guilty of such fraudulent misrepresentation.

   7. Notices, etc. All notices, requests, demands or other communications
required by or otherwise with respect to this Agreement shall be in writing and
shall be deemed to have been duly given to any party when

                                      D-5
<PAGE>

delivered personally (by courier service or otherwise), when delivered by
telecopy if receipt is confirmed by return telecopy, or five days after being
mailed by registered or certified mail, return receipt requested, in each case
to the applicable addresses set forth below:

       If to Parent:

       with a copy to:

         Wachtell, Lipton, Rosen & Katz
         51 W. 52nd Street
         New York, New York 10019
         Attention: Trevor S. Norwitz, Esq.
         Telecopy: (212) 403-2000

       If to the Stockholder:

       with a copy to:

       or to such other address as such party shall have designated by
       notice so given to each other party.

   8. Amendments, Waivers, etc. This Agreement may not be amended,
supplemented, waived or otherwise modified except by an instrument in writing
signed by the party against whom enforcement is sought. The failure of any
party to exercise any right, power or remedy provided under this Agreement or
otherwise available in respect hereof at law or in equity, or to insist upon
compliance by any other party with its obligations hereunder, and any custom or
practice of the parties at variance with the terms hereof, shall not constitute
a waiver by such party of its right to exercise any such or other right, power
or remedy or to demand such compliance.

   9. Entire Agreement. This Agreement embodies the entire agreement and
understanding between the parties relating to the subject matter hereof and
supersedes all prior agreements and understandings relating to such subject
matter.

   10. Severability. If any term of this Agreement or the application thereof
to any party or circumstance shall be held invalid or unenforceable to any
extent, the remainder of this Agreement and the application of such term to the
other parties or circumstances shall not be affected thereby and shall be
enforced to the greatest extent permitted by applicable law.

   11. Successors and Assigns. This Agreement shall be binding upon and shall
inure to the benefit of and be enforceable by the parties and their respective
successors and assigns; provided that neither the rights nor the obligations of
any party may be assigned or delegated without the prior written consent of the
other parties.

   12. Governing Law. This Agreement and all disputes hereunder shall be
governed by and construed and enforced in accordance with the laws of the State
of Delaware.

                                      D-6
<PAGE>

   13. Name, Captions. The name assigned this Agreement and the section
captions used herein are for convenience of reference only and shall not affect
the interpretation or construction hereof.

   14. Counterparts. This Agreement may be executed in any number of
counterparts, each of which shall be deemed to be an original, but all of which
together shall constitute one instrument. Each counterpart may consist of a
number of copies each signed by less than all, but together signed by all, the
parties hereto.

   15. Termination. This Agreement shall terminate and be of no further force
and effect upon the later of the expiration of the Registration Period and the
tenth day after effectiveness of the registration statement filed pursuant to
the Request made during the Registration Period; provided that, notwithstanding
this Section 15, the provisions of Section 6 shall survive the termination of
this Agreement.

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

                                          DANAHER CORPORATION
                                          By:
                                             ---------------------------------
                                             Name:
                                             Title:

                                          -------------------------------------
                                          Name: Kathryn C. Hach-Darrow


                                      D-7
<PAGE>

                                                                      APPENDIX E

                      AGREEMENT AND PLAN OF REORGANIZATION

   AGREEMENT AND PLAN OF REORGANIZATION (this "Agreement"), dated as of April
21, 1999, by and among DANAHER CORPORATION, a Delaware corporation ("Parent"),
C&K ENTERPRISES, LTD., a Delaware corporation ("C&K"), and Kathryn Hach-Darrow
and Bruce J. Hach (the "Shareholders").

   WHEREAS, C&K owns 1,511,415 shares of Common Stock ("Common Stock"), par
value $1.00 per share, of Hach Company, a Delaware corporation (the "Company"),
and 1,511,415 shares of Class A Common Stock ("Class A Common Stock"), par
value $1.00 per share, of the Company (such shares of Class A Common Stock,
together with such shares of Common Stock, the "Shares");

   WHEREAS, Parent, H2O Acquisition Corp., a Delaware corporation and wholly
owned subsidiary of Parent, and the Company are entering into an Agreement and
Plan of Merger dated as of the date hereof (the "Merger Agreement");

   WHEREAS, Parent wishes to acquire from C&K, and C&K wishes to transfer to
Parent, the Shares in exchange for Parent Common Stock following which C&K
intends promptly to liquidate and to distribute all of its assets to its
stockholders, who shall assume all of its liabilities;

   WHEREAS, for Federal income tax purposes, it is intended that the
transactions described in Article II below (the "Reorganization") shall qualify
as a reorganization within the meaning of Section 368(a) of the Internal
Revenue Code of 1986, as amended;

   WHEREAS, Parent, C&K and the Shareholders desire to set forth herein the
terms and conditions of the Reorganization;

   NOW, THEREFORE, the parties hereto agree as follows:

                                   ARTICLE I

                              Certain Definitions

   Definitions. All capitalized terms used in this Agreement that are not
otherwise defined herein shall have the meanings assigned to them in the Merger
Agreement.

                                   ARTICLE II

                          Exchange; Liquidation of C&K

   Section 2.1.  Exchange. At such time as shall be determined by agreement
between Parent and C&K, but in no event earlier than the satisfaction or waiver
of the conditions set forth in Article III, and in any event prior to the
Effective Time (the "Reorganization Closing Time"), subject to the terms and
conditions of this Agreement, C&K shall transfer to Parent all of the Shares,
constituting all of its assets, and in consideration thereof Parent shall
transfer to C&K Parent Common Stock as follows: each Share owned by C&K shall
be exchanged for a fraction of a share of Parent Common Stock equal to the
Exchange Ratio. To the extent that C&K otherwise would have been entitled to a
fraction of a share of Parent Common Stock, C&K shall receive in lieu thereof
cash (without interest) in an amount determined by multiplying the fractional
share interest to which C&K would otherwise be entitled by the closing sale
price of a share of Parent Common Stock on the NYSE composite tape on the last
full trading day prior to the Effective Time. C&K shall not be entitled to
dividends, voting rights or any other rights in respect of any fractional
share.

   Section 2.2. Liquidation. Promptly after the Reorganization Closing Time,
C&K shall liquidate by distributing to its stockholders all of its assets and
causing such stockholders to assume all of its liabilities.

                                      E-1
<PAGE>

                                  ARTICLE III

                             Conditions to Closing

   (a) The obligations of the parties to consummate the Reorganization is
subject to the satisfaction at or prior to the Reorganization Closing Time of
all of the following conditions:

     (i) The satisfaction at or prior to the Reorganization Closing Time of
  all of the conditions set forth in Article VI of the Merger Agreement (any
  of which may be waived to the extent set forth in the Merger Agreement).

     (ii) A Registration Statement on Form S-4 (together with all amendments
  thereto) or other applicable registration statement covering the Parent
  Common Stock to be issued hereunder shall have been filed and declared
  effective by the SEC pursuant to the Securities Act of 1933, as amended,
  and no stop order suspending the effectiveness of such Form S-4 or other
  registration statement shall have been issued by the SEC, and no
  proceedings for that purpose shall have been initiated or, to the knowledge
  of Parent or C&K, threatened by the SEC and, in the case of any of the
  foregoing, shall be ongoing.

     (iii) The shares of Parent Common Stock issuable pursuant to this
  Agreement shall have been approved for listing on the NYSE, subject to
  official notice of issuance.

   (b) The obligations of C&K and the Shareholders to consummate the
Reorganization are subject to the receipt by the Shareholders at or prior to
the Reorganization Closing Time of the opinion of Sidley & Austin, dated as of
the Reorganization Closing Time, to the effect that, on the basis of facts,
representations and assumptions set forth in such opinion, the Reorganization
will be treated for Federal income tax purposes as a reorganization qualifying
under the provisions of Section 368(a) of the Code and that neither C&K nor any
of the Shareholders will recognize any gain or loss for Federal income tax
purposes as a result of the Reorganization or receipt of the consideration
described in Section 2.1 above (except with respect to cash paid in lieu of
fractional shares). The issuance of such opinion shall be conditioned on the
receipt of customary representation letters in form and substance reasonably
acceptable to Sidley & Austin.

                                   ARTICLE IV

                                  Termination

   This Agreement and Plan of Reorganization shall terminate upon the
termination of the Merger Agreement in accordance with its terms.

                                   ARTICLE V

                 No Assumptions of Liabilities; Indemnification

   Parent shall not assume any liabilities of or pertaining to C&K or arising
from C&K's ownership of the Shares. The Shareholders shall jointly and
severally indemnify Parent against any loss, damage, liability, deficiency,
tax, interest, penalty, cost or expense (including reasonable attorneys' fees)
incurred or suffered by Parent and resulting or arising from any losses,
liabilities, obligations and Taxes, whether fixed, contingent, accrued,
unaccrued, past, future or otherwise, of or pertaining to C&K or arising from
C&K's ownership of the Shares.

                                   ARTICLE VI

                               General Provisions

   Section 6.1. Further Assurances. At any time, and from time to time, after
the Closing Date, each party will execute such additional instruments and take
such actions as may be reasonably requested by the other party to confirm or
perfect title to any property transferred hereunder or otherwise to carry out
the intent and purposes of this Agreement.

                                      E-2
<PAGE>

   Section 6.2. Survival. The provisions of Article V shall survive the
Reorganization Closing Time and the Closing.

   Section 6.3. Governing Law. This Agreement shall be governed by and
construed and enforced in accordance with the laws of the State of Delaware
applicable to contracts made and to be performed therein without regard to the
conflicts of law principles of such State.

   Section 6.4. Assignments. This Agreement shall inure to the benefit of, and
be binding upon the parties hereto and their successors and assigns; provided,
however, that any assignment by either party of its rights under this Agreement
without the written consent of the other party shall be void.

   Section 6.5. Counterparts. This Agreement may be executed simultaneously in
two or more counterparts, each of which shall be deemed an original, but all of
which together shall constitute one and the same instrument.

   Section 6.6. Reasonable Efforts. The parties hereto shall each use their
reasonable efforts and cooperate to cause the closing conditions hereunder to
be satisfied, including, without limitation, to cause the Form S-4 or other
registration statement referred to in Article III to become effective as
promptly as possible.

   Section 6.7. No Condition. It is expressly agreed and acknowledged that the
Reorganization shall not be a condition to the Closing under the Merger
Agreement.

   IN WITNESS WHEREOF, this Agreement has been signed by or on behalf of each
of the parties as of the day first above written.


                                          DANAHER CORPORATION

                                             /s/ Patrick Allender
                                          By: _________________________________
                                             Name:Patrick W. Allender
                                             Title:Senior Vice President and
                                                   Chief Financial Officer

                                          C&K ENTERPRISES, LTD.

                                             /s/ Kathryn Hach-Darrow
                                          By:__________________________________
                                             Name:Kathryn Hach-Darrow
                                             Title:President and Treasurer

                                          THE SHAREHOLDERS

                                                 /s/ Kathryn Hach-Darrow
                                          _____________________________________
                                                    Kathryn Hach-Darrow

                                                    /s/ Bruce J. Hach
                                          _____________________________________
                                                      Bruce J. Hach

                                      E-3
<PAGE>

                                                                      APPENDIX F

                    [LETTERHEAD OF LAZARD FRERES & CO. LLC]

                                                                  April 21, 1999

The Board of Directors
Hach Company
5600 Lindbergh Drive
Loveland, Colorado 80533

Dear Members of the Board:

   We understand that Danaher Corporation ("Danaher") and Hach Company ("Hach")
have entered into an Agreement and Plan of Merger dated as of April 21, 1999
(the "Agreement"), pursuant to which a wholly-owned subsidiary of Danaher will
be merged with and into Hach (the "Merger") as a result of which Hach will
become a wholly-owned subsidiary of Danaher. Pursuant to the Agreement, each
share of Common Stock, par value $1.00 per share, and Class A Common Stock, par
value $1.00 per share, of Hach (collectively the "Hach Shares") outstanding
immediately prior to the effective time of the Merger will be converted into
0.2987 shares (the "Exchange Ratio") of common stock, par value $0.01 per share
of Danaher (the "Danaher Shares"), subject to adjustment as provided in the
Agreement.

   You have requested our opinion as to the fairness, from a financial point of
view, to the holders of Hach Shares, taken as a whole, of the Exchange Ratio.
In connection with this opinion, we have:

  (i) Reviewed the financial terms and conditions of the Agreement;

  (ii)Analyzed certain historical business and financial information relating
     to Danaher and Hach;

  (iii) Reviewed various financial forecasts and other data provided to us by
        Danaher and Hach relating to their respective businesses;

  (iv) Participated in discussions with members of the senior management of
       Danaher and Hach with respect to the businesses and prospects of
       Danaher and Hach, respectively and the strategic objectives of each;

  (v) Reviewed public information with respect to certain other companies in
      lines of businesses we believe to be generally comparable to those of
      Danaher and Hach;

  (vi) Reviewed the financial terms of certain business combinations
       involving companies in lines of businesses we believe to be generally
       comparable to those of Danaher and Hach, and in other industries
       generally;

  (vii) Reviewed the historical stock prices and trading volumes of Danaher
        Shares and Hach Shares; and

  (viii) Conducted such other financial studies, analyses and investigations
         as we deemed appropriate.

   We have relied upon the accuracy and completeness of the foregoing
information, and have not assumed any responsibility for any independent
verification of such information or any independent valuation or appraisal of
any of the assets or liabilities of Danaher or Hach, or concerning the solvency
or fair value of either of the foregoing entities. With respect to financial
forecasts we have assumed that they have been reasonably prepared on bases
reflecting the best currently available estimates and judgments of management
of Danaher and Hach as to the future financial performance of Danaher and Hach,
respectively. We assume no responsibility for and express no view as to such
forecasts or the assumptions on which they are based. We understand and have
assumed that the Merger will be accounted for as a pooling of interests and be
a reorganization within the meaning of Section 368(a) of the Internal Revenue
Code of 1986, as amended.

   Further, our opinion is necessarily based on accounting standards, economic,
monetary, market and other conditions as in effect on, and the information made
available to us as of, the date hereof. You have not authorized us to solicit,
and we have not solicited any indications of interest or proposals from third
parties

                                      F-1
<PAGE>

with respect to a purchase of all or part of Hach's business. In that regard,
we understand that certain shareholders representing a majority of Hach's
voting power have executed an agreement pursuant to which they have agreed to
consent in writing to the Merger concurrently with the execution of the Merger
Agreement, and that, accordingly, it is not contemplated that a shareholder
meeting for the purposes of approving the Merger Agreement will be held.

   In rendering our opinion, we have assumed that the Merger will be
consummated on the terms described in the Agreement, without any waiver of any
material rights, terms or conditions by Hach and that obtaining the necessary
regulatory approvals for the Merger will not have an adverse effect on Danaher
or Hach. In addition, we are not expressing any opinion as to the prices at
which Danaher Shares or Hach Shares may trade following the date of this
opinion.

   Lazard Freres & Co. LLC is acting as investment banker to Hach in connection
with the Merger and will receive a fee for our services, a substantial portion
of which is contingent upon the closing of the Merger. Lazard Freres & Co. LLC
has in the past acted as investment banker to Hach and received fees for its
services. In addition, Hach has agreed to indemnify us for certain liabilities
that may arise out of our engagement as investment banker.

   Our engagement and the opinion expressed herein are for the benefit of
Hach's Board of Directors in connection with its consideration of the Merger.
This opinion is not intended to and does not constitute a recommendation to any
shareholder of Hach as to whether such holder should vote to approve, or take
any other action with respect to, the Merger and the transactions contemplated
by the Agreement. It is understood that this letter may not be disclosed or
otherwise referred to without our prior consent, except as may otherwise be
required by law or by a court of competent jurisdiction, except that this
opinion may be included in its entirety in a proxy or information statement
required to be filed with the Securities and Exchange Commission in connection
with the Merger.

   Based on and subject to the foregoing, we are of the opinion that the
Exchange Ratio is fair to the holders of Hach Shares, taken as a whole, from a
financial point of view.

                                             Very truly yours,

                                             LAZARD FRERES & CO. LLC

                                             By: /s/ Jeffrey A. Golman
                                                -------------------------------
                                                    Jeffrey A. Golman
                                                    Managing Director

                                      F-2
<PAGE>

                                    PART II

                   INFORMATION NOT REQUIRED IN THE PROSPECTUS

Item 20. Indemnification of Directors and Officers

   Section 145 of the Delaware General Corporation Law ("DGCL") provides that a
corporation has the power to indemnify its officers, directors, employees and
agents (or persons serving in such positions in another entity at the request
of the corporation) against expenses, including attorney's fees, judgments,
fines or settlement amounts actually and reasonably incurred by them in
connection with the defense of any action by reason of being or having been
directors or officers, if such person shall have acted in good faith and in a
manner reasonably believed to be in or not opposed to the best interests of the
corporation (and, with respect to any criminal action, had no reasonable cause
to believe the person's conduct was unlawful), except that if such action shall
be by or in the right of the corporation, no such indemnification shall be
provided as to any claim, issue or matter as to which such person shall have
been judged to have been liable to the corporation unless and to the extent
that the Court of Chancery of the State of Delaware, or another court in which
the suit was brought, shall determine upon application that, in view of all of
the circumstances of the case, such person is fairly and reasonably entitled to
indemnity.

   The Registrant's Certificate of Incorporation provides that the Registrant
will indemnify its officers and directors to the fullest extent permitted by
Delaware law. The By-Laws provide that the Registrant will indemnify its
directors, officers, employees and agents upon the determination that such
person has met the applicable standard of conduct under Delaware law as
restated in the By-Laws. The persons who may determine that the applicable
standard of conduct has been met are (1) the Board of Directors by a majority
vote of a quorum consisting of directors who were not parties to such action,
suit or proceeding, (2) if such a quorum is not obtainable, or even if
obtainable a quorum of disinterested directors so directs, independent legal
counsel in a written opinion, or (iii) the stockholders. To the extent that a
director, officer, employee or agent of the Registrant has been successful on
the merits or otherwise in defense of such claim, the Registrant will indemnify
him against expenses without the necessity of making a determination of whether
or not that person has met the applicable standard of conduct.

   As permitted by Section 102 of the DGCL, the Registrant's Certificate of
Incorporation provides that no director shall be liable to the Registrant or
its stockholders for monetary damages for any breach of fiduciary duty as a
director other than (i) for breaches of the director's duty of loyalty to the
Registrant or its stockholders, (ii) for acts or omissions not in good faith or
which involve intentional misconduct or a knowing violation of law, (iii) for
the unlawful payment of dividends or unlawful stock purchases or redemptions
under Section 174 of the DGCL, or (iv) for any transaction from which the
director derived an improper personal benefit.

Item 21. Exhibits and Financial Statement Schedules

   (a) Exhibits:

<TABLE>
 <C>  <S>
  2.1 Agreement and Plan of Merger, dated as of April 21, 1999, among the
      Registrant, H\2\O Acquisition Corp. and Hach Company (included as
      Appendix A to the Information Statement/Prospectus incorporated as part
      of this Registration Statement). The Registrant agrees to furnish
      supplementally a copy of the disclosure schedules to the Commission upon
      request.
  2.2 Agreement and Plan of Reorganization, dated as of April 21, 1999, by and
      among the Registrant, C&K Enterprises, Ltd., and Kathryn C. Hach-Darrow
      and Bruce J. Hach (included as Appendix E to the Information
      Statement/Prospectus incorporated as part of this Registration
      Statement).
  5.1 Opinion of Wilmer, Cutler & Pickering as to the legality of the shares
      being issued (including consent).
  8.1 Opinion of Wachtell, Lipton, Rosen & Katz regarding the federal income
      tax consequences of the Merger (including consent).
</TABLE>

                                      II-1
<PAGE>

<TABLE>
 <C>  <S>
  8.2 Opinion of McBride Baker & Coles regarding the federal income tax
      consequences of the Merger (including consent).
 23.1 Consent of Arthur Andersen LLP relating to the audited financial
      statements of the Registrant.
 23.2 Consent of PricewaterhouseCoopers LLP relating to the audited financial
      statements of Hach.
 23.3 Consent of Wilmer, Cutler & Pickering (included in Exhibit No. 5.1).
 23.4 Consent of Wachtell, Lipton, Rosen & Katz (included in Exhibit No. 8.1).
 23.5 Consent of McBride Baker & Coles (included in Exhibit No. 8.2).
 23.6 Consent of Lazard Freres & Co. LLC.
 24.1 Power of Attorney.
 99.1 Stockholders Support Agreement, dated as of April 21, 1999, by and among
      the Registrant, on the one hand, and Kathryn C. Hach-Darrow and Bruce J.
      Hach, on the other hand (included as Appendix B to the Information
      Statement/Prospectus incorporated as part of this Registration
      Statement).
</TABLE>

Item 22. Undertakings

   (a) The undersigned Registrant hereby undertakes:

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

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

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

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

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

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

   (b) Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors, officers and controlling persons of
the Registrant pursuant to the foregoing provisions, or otherwise, the
Registrant has been advised that in the opinion of the Securities and Exchange
Commission such indemnification is against public policy as expressed in the
Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
Registrant of expenses incurred or paid by a director, officer or controlling
person of the Registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the Registrant will, unless in
the opinion of its counsel the matter has been settled

                                      II-2
<PAGE>

by controlling precedent, submit to a court of appropriate jurisdiction the
question whether such indemnification by it is against public policy as
expressed in the Act and will be governed by the final adjudication of such
issue.

   (c) The undersigned Registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, each filing of the
Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Securities Exchange Act of 1934 (and, where applicable, each filing of an
employee benefit plan's annual report pursuant to Section 15(d) of the
Securities Exchange Act of 1934) that is incorporated by reference in the
Registration Statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

   (d) The undersigned Registrant hereby undertakes as follows: that prior to
any public reoffering of the securities registered hereunder through use of a
prospectus which is a part of this Registration Statement, by any person or
party who is deemed to be an underwriter within the meaning of Rule 145(c), the
issuer undertakes that such reoffering prospectus will contain the information
called for by the applicable registration form with respect to reofferings by
persons who may be deemed underwriters, in addition to the information called
for by the other items of the applicable form.

   (e) The Registrant undertakes that every prospectus: (i) that is filed
pursuant to paragraph (d) immediately preceding, or (ii) that purports to meet
the requirements of Section l0(a)(3) of the Securities Act and is used in
connection with an offering of securities subject to Rule 415, will be filed as
a part of an amendment to the Registration Statement and will not be used until
such amendment is effective, and that, for purposes of determining any
liability under the Securities Act of 1933, each such post-effective amendment
shall be deemed to be a new registration statement relating to the securities
offering therein, and the offering of such securities at that time shall be
deemed to be the initial bona fide offering thereof.

   (f) The undersigned Registrant hereby undertakes to respond to requests for
information that is incorporated by reference into the prospectus pursuant to
Item 4, 10(b), 11 or 13 of this Form, within one business day of receipt of
such request, and to send the incorporated documents by first class mail or
other equally prompt means. This includes information contained in the
documents filed subsequent to the effective date of the Registration Statement
through the date of responding to the request.

   (g) The undersigned Registrant hereby undertakes to supply by means of a
post-effective amendment all information concerning a transaction, and the
company being acquired involved therein, that was not the subject of and
included in the Registration Statement when it became effective.


                                      II-3
<PAGE>

                                   SIGNATURES

   Pursuant to the requirements of the Securities Act of 1933, the Registrant
has duly caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the District of Columbia, on June 3,
1999.

                                          DANAHER CORPORATION

                                                 /s/ Patrick W. Allender
                                          By: _________________________________
                                             Patrick W. Allender
                                             Senior Vice President, Chief
                                             Financial Officer and Secretary

   Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.

<TABLE>
<CAPTION>
              Signature                          Title                   Date
              ---------                          -----                   ----

<S>                                    <C>                        <C>
                  *                    President, Chief Executive    June 3, 1999
______________________________________  Officer and Director
          George M. Sherman

       /s/ Patrick W. Allender         Senior Vice President,        June 3, 1999
______________________________________  Chief Financial Officer
         Patrick W. Allender            and Secretary

         /s/ C. Scott Brannan          Vice President --             June 3, 1999
______________________________________  Administration and
           C. Scott Brannan             Controller (Chief
                                        Accounting Officer)

                  *                    Chairman of the Board         June 3, 1999
______________________________________
           Steven M. Rales

                  *                    Chairman of the Executive     June 3, 1999
______________________________________  Committee
          Mitchell P. Rales

                  *                    Director                      June 3, 1999
______________________________________
          Mortimer M. Caplan

                  *                    Director                      June 3, 1999
______________________________________
          Donald J. Ehrlich

                  *                    Director                      June 3, 1999
______________________________________
            Walter G. Lohr

                  *                    Director                      June 3, 1999
______________________________________
       A. Emmet Stephenson, Jr.
</TABLE>

* Pursuant to the Powers of Attorney included as Exhibit 24.1 to this
Registration Statement

    /s/ C. Scott Brannan
* By: __________________
    C. Scott Brannan
    Attorney-in-Fact

                                      II-4
<PAGE>

                                 EXHIBIT INDEX

<TABLE>
<CAPTION>
 Exhibit
   No.                                 Description
 -------                               -----------
 <C>     <S>
   2.1   Agreement and Plan of Merger, dated as of April 21, 1999, among the
         Registrant, H\2\O Acquisition Corp. and Hach Company (included as
         Appendix A to the Information Statement/Prospectus incorporated as
         part of this Registration Statement). The Registrant agrees to furnish
         supplementally a copy of the disclosure schedules to the Commission
         upon request.
   2.2   Agreement and Plan of Reorganization, dated as of April 21, 1999, by
         and among the Registrant, C&K Enterprises, Ltd., and Kathryn C. Hach-
         Darrow and Bruce J. Hach (included as Appendix E to the Information
         Statement/Prospectus incorporated as part of this Registration
         Statement).
   5.1   Opinion of Wilmer, Cutler & Pickering as to the legality of the shares
         being issued (including consent).
   8.1   Opinion of Wachtell, Lipton, Rosen & Katz regarding the federal income
         tax consequences of the Merger (including consent).
   8.2   Opinion of McBride Baker & Coles regarding the federal income tax
         consequences of the Merger (including consent).
  23.1   Consent of Arthur Andersen LLP relating to the audited financial
         statements of the Registrant.
  23.2   Consent of PricewaterhouseCoopers LLP relating to the audited
         financial statements of Hach.
  23.3   Consent of Wilmer, Cutler & Pickering (included in Exhibit No. 5.1).
  23.4   Consent of Wachtell, Lipton, Rosen & Katz (included in Exhibit No.
         8.1).
  23.5   Consent of McBride Baker & Coles (included in Exhibit No. 8.2).
  23.6   Consent of Lazard Freres & Co. LLC.
  24.1   Power of Attorney.
  99.1   Stockholders Support Agreement, dated as of April 21, 1999, by and
         among the Registrant, on the one hand, and Kathryn C. Hach-Darrow and
         Bruce J. Hach, on the other hand (included as Appendix B to the
         Information Statement/Prospectus incorporated as part of this
         Registration Statement).
</TABLE>

<PAGE>

                                                                     Exhibit 5.1

                   [LETTERHEAD OF WILMER, CUTLER & PICKERING]

                                  June 3, 1999

Danaher Corporation
1250 24th Street, N.W.
Washington, D.C. 20037

            Re: Danaher Corporation (the "Company")
                Registration Statement on Form S-4

Ladies and Gentlemen:

   In connection with the registration of the issuance of shares (the "Common
Shares") of Common Stock of the Company, par value $0.01 per share, under the
Securities Act of 1933, as amended (the "Act"), by the Company, on Form S-4
filed with the Securities and Exchange Commission (the "Commission") on June 3,
1999 (the "Registration Statement"), you have requested our opinion with
respect to the matters set forth below.

   In our capacity as your special counsel, we are familiar with the
proceedings taken and proposed to be taken by the Company in connection with
the authorization and issuance of the Common Shares by the Company pursuant to
(i) the Agreement and Plan of Merger, dated April 21, 1999, among the Company,
H\2\O Acquisition Corp. and Hach Company (the "Merger Agreement"), and (ii)
the Agreement and Plan of Reorganization, dated as of April 21, 1999, among the
Company, C&K Enterprises, Ltd. and Kathryn C. Hach-Darrow and Bruce J. Hach
(the "Reorganization Agreement"). We assume for purposes of this opinion that
(i) the merger of H\2\O Acquisition Corp. with and into Hach Company (the
"Merger") will take place at the Effective Time (as defined in the Merger
Agreement) in the manner contemplated by the Merger Agreement and (ii) the
reorganization (the "Reorganization") of C&K Enterprises, Ltd. will take place
at the Reorganization Closing Time (as defined in the Reorganization Agreement)
in the manner contemplated by the Reorganization Agreement. In addition, we
have made such legal and factual examinations and inquiries, including
examinations of documents, corporate records and instruments, as we have deemed
necessary or appropriate for purposes of this opinion.

   In our examination of documents and records, we have assumed, without
investigation, the genuineness of all signatures, the legal capacity of natural
persons, the authenticity of all documents submitted to us as originals, the
conformity with originals of all documents submitted to us as telecopied,
certified, photostatic or reproduced copies and the authenticity of all such
documents. We have also assumed, but not independently verified, that all
documents executed by a party other than the Company or any respective
subsidiaries thereof were duly and validly authorized, executed and delivered
by such party, that such party has the requisite power and authority to
execute, deliver and perform such agreements and other documents, and that such
agreements and other documents are legal, valid and binding obligations of such
party and enforceable against such party in accordance with their respective
terms.

   Based upon and subject to the foregoing, it is our opinion that the Common
Shares being registered under the Registration Statement, when issued pursuant
to the Merger and the Reorganization in the manner contemplated by the
Registration Statement, the Merger Agreement and the Reorganization Agreement,
will be validly issued, fully paid and nonassessable.
<PAGE>

   This opinion is limited to the general corporate law of the State of
Delaware, and we express no opinion with respect to the applicability thereto,
or the effect thereon, of any other laws or as to any matters of municipal law
or the laws of any other local agencies within the state. We express no opinion
whatsoever as to any other laws or regulations or as to laws relating to choice
of law or conflicts of law principles.

   The information set forth herein is as of the date hereof. We assume no
obligation to advise you of changes which may thereafter be brought to our
attention. Our opinions are based on statutory and judicial decisions in effect
at the date hereof, and we do not opine with respect to any law, regulation,
rule or governmental policy or decision which may be enacted, determined or
adopted after the date hereof, nor assume any responsibility to advise you of
future changes in our opinions.

   We hereby consent to the use of this opinion as Exhibit 5.1 to the
Registration Statement. We also consent to any and all references to our firm
under the caption "Legal Matters" in the Registration Statement. In giving such
consent, we do not thereby admit that we are in the category of persons whose
consent is required under Section 7 of the Act and the Rules and Regulations of
the Commission promulgated thereunder.

                                          Very truly yours,

                                            /s/ Mark A. Dewire
                                          --------------------
                                          Mark A. Dewire, a partner

<PAGE>

                                                                     Exhibit 8.1

                 [LETTERHEAD OF WACHTELL, LIPTON, ROSEN & KATZ]

                                                                    June 3, 1999
Danaher Corporation
1250 24th Street, N.W.
Washington, DC 20037

Ladies and Gentlemen:

   Reference is made to the Registration Statement of Danaher Corporation, a
Delaware corporation ("Danaher"), on Form S-4 (the "Registration Statement")
and the information statement/prospectus included therein, each as amended or
supplemented through the date hereof, relating to the merger (the "Merger") of
H\2\O Acquisition Corp., a Delaware corporation and a wholly owned subsidiary
of Danaher, with and into Hach Company, a Delaware corporation.

   We have participated in the preparation of the discussion set forth in the
section entitled "THE MERGER--Certain Federal Income Tax Consequences." In our
opinion, such discussion, insofar as it relates to the federal income tax
consequences of the Merger, is accurate in all material respects.

   We hereby consent to the filing of this opinion with the Securities and
Exchange Commission as an exhibit to the Registration Statement and to the
references therein to us. In giving such consent, we do not thereby admit that
we are in the category of persons whose consent is required under Section 7 of
the Securities Act of 1933, as amended.

                                          Very truly yours,

                                          /s/ Wachtell, Lipton, Rosen & Katz

<PAGE>

                                                                     Exhibit 8.2

                       [MCBRIDE BAKER & COLES LETTERHEAD]

                                                                    June 3, 1999

Hach Company
5600 Lindbergh Drive
Loveland, Colorado 80539

Ladies and Gentlemen:

   We have acted as counsel to Hach Company, a Delaware corporation (the
"Company"), in connection with the proposed merger (the "Merger") of H20
Acquisition Corp. ("Sub"), a Delaware corporation and wholly-owned subsidiary
of Danaher Corporation, a Delaware corporation ("Parent"), with and into the
Company, pursuant to the terms of the Agreement and Plan of Merger dated as of
April 21, 1999 (the "Merger Agreement"), among Parent, Sub, and the Company, as
described in the Registration Statement on Form S-4 to be filed by Parent with
the Securities and Exchange Commission today (the "Registration Statement").

   We have participated in the preparation of the discussion contained in the
information statement/prospectus included as part of the Registration Statement
(the "Prospectus") under the caption "THE MERGER--Certain Federal Income Tax
Consequences." In our opinion, that discussion, insofar as it relates to the
federal income tax consequences of the Merger, is accurate in all material
respects.

   We hereby consent to the filing of this opinion with the Securities and
Exchange Commission as an exhibit to the Registration Statement. We also
consent to the references to McBride Baker & Coles in the Registration
Statement and the Prospectus. In giving such consent, we do not thereby admit
that we are in the category of persons whose consent is required under Section
7 of the Securities Act of 1933, as amended.

                                          Very truly yours,

                                          MCBRIDE BAKER & COLES

                                                  /s/ Thomas J. Kinasz
                                          By: _________________________________
                                                        A Partner

<PAGE>

                                                                    Exhibit 23.1

                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

   As independent public accountants, we hereby consent to the incorporation by
reference in this registration statement of our reports dated January 27, 1999
included (or incorporated by reference) in Danaher Corporation's Form 10-K for
the year ended December 31, 1998 and to all references to our Firm included in
this registration statement.

                                          /s/ Arthur Andersen LLP

Washington, D.C.
June 3, 1999

<PAGE>

                                                                    Exhibit 23.2

                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

   We hereby consent to the incorporation by reference in this Registration
Statement on Form S-4 of Danaher Corporation of our report dated June 4, 1998
relating to the financial statements of Hach Company, which appears in the 1998
Annual Report to Shareholders of Hach Company, which is incorporated by
reference in Hach Company's Annual Report on Form 10-K for the year ended April
30, 1998. We also consent to the incorporation by reference of our report dated
June 4, 1998 relating to the financial statement schedule which appears in such
Annual Report on Form 10-K. We also consent to the reference to us under the
heading "Experts" in such Registration Statement.

                                          /s/ PricewaterhouseCoopers LLP

Denver, Colorado
June 3, 1999

<PAGE>

                                                                    Exhibit 23.6

                       CONSENT OF LAZARD FRERES & CO. LLC

   We hereby consent to the use of our name and the description of our opinion
letter, dated April 21, 1999, under the captions "SUMMARY--Fairness Opinion,"
"THE MERGER--Background of the Merger," "THE MERGER--Hach's Reasons for the
Merger; Recommendation of the Hach Board," "THE MERGER--Opinion of the
Investment Banker for the Hach Board" and "THE MERGER AGREEMENT--
Representations and Warranties" in, and to the inclusion of such opinion letter
as Annex F to, the Information Statement/Prospectus of Hach Company and Danaher
Corporation, which Information Statement/Prospectus is part of the Registration
Statement on Form S-4 of Danaher Corporation filed with the Securities and
Exchange Commission on June 3, 1999. By giving such consent, we do not thereby
admit that we are experts with respect to any part of such Registration
Statement within the meaning of the term "expert" as used in, or that we come
within the category of such persons whose consent is required under, the
Securities Act of 1933, as amended, or the rules and regulations of the
Securities and Exchange Commission promulgated thereunder.

                                          Lazard Freres & Co. LLC

                                                   /s/ Jeffrey A. Golman
                                          By: _________________________________
                                                     Jeffrey A. Golman
                                                     Managing Director

New York, New York
June 3, 1999

<PAGE>

                                                                    Exhibit 24.1

                               POWER OF ATTORNEY

   Each person whose signature appears below constitutes and appoints Patrick
W. Allender and C. Scott Brannan, and each of them, with full power of
substitution and resubstitution and each with full power to act without the
other, his true and lawful attorney-in-fact and agent, for him and in his name,
place and stead, in any and all capacities, to sign this Registration Statement
on Form S-4 relating to the issuance of shares of Danaher Corporation common
stock pursuant to the Agreement and Plan of Merger, dated as of April 21, 1999,
among Danaher Corporation (the "Company"), a wholly-owned subsidiary of the
Company and Hach Company, and the Agreement and Plan of Reorganization, dated
as of April 21, 1999, by and among the Company, C&K Enterprises, Ltd., and
Kathryn C. Hach-Darrow and Bruce J. Hach, and any and all amendments (including
post-effective amendments) to this Registration Statement, and to file the
same, with all exhibits thereto, and all other documents in connection
therewith, with the Securities Exchange Commission or any state, granting unto
said attorneys-in-fact and agents, and each of the them, full power and
authority to do and perform each and every act and thing requisite and
necessary to be done in and about the premises, as fully to all intents and
purposes as he might or could do in person, hereby ratifying and confirming all
that said attorneys-in-fact and agents, or any of them, or their, or his
substitutes or substitute, may lawfully do or cause to be done by virtue
hereof.

Date: May 27, 1999

<TABLE>
<S>                                        <C>
           /s/ Steven M. Rales                       /s/ Donald J. Ehrlich
__________________________________________ __________________________________________
             Steven M. Rales                           Donald J. Ehrlich

          /s/ Mitchell P. Rales                        /s/ Walter G. Lohr
__________________________________________ __________________________________________
            Mitchell P. Rales                            Walter G. Lohr

          /s/ George M. Sherman                   /s/ A. Emmet Stephenson, Jr.
__________________________________________ __________________________________________
            George M. Sherman                       A. Emmet Stephenson, Jr

          /s/ Mortimer M. Caplan
__________________________________________
            Mortimer M. Caplan
</TABLE>


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