THERMO BIOANALYSIS CORP /DE
DEF 14A, 1997-05-02
LABORATORY ANALYTICAL INSTRUMENTS
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                           SCHEDULE 14A INFORMATION

          Proxy Statement Pursuant to Section 14(a) of the Securities
                             Exchange Act of 1934
                              (Amendment No.   )

       Filed by the Registrant  [ X ]

       Filed by a Party other than the Registrant  [   ]

       Check the appropriate box:

       [   ]Preliminary Proxy Statement   [   ]Confidential, for 
                                               Use of the Commission 
                                               Only (as Permitted by 
                                               Rule 14a-6(e)(2))
       [ X ]Definitive Proxy Statement

       [   ]Definitive Additional Materials

       [   ]Soliciting Material Pursuant to Section 240.14a-11(c) or 
            Section 240.14a-12

                        THERMO BIOANALYSIS CORPORATION
                        ------------------------------
                 (Name of Registrant as Specified in Charter)



                    --------------------------------------
         (Name of Person(s) Filing Proxy Statement, if other than the
                                  Registrant)

       Payment of Filing Fee (Check the appropriate box):

       [ X ]No fee required.

       [   ]Fee computed on table below per Exchange Act Rules 
                 14a-6(i)(4) and 0-11.
            (1)  Title of each class of securities to which transaction 
                 applies: ______________________________________________
            (2)  Aggregate number of securities to which transaction 
                 applies: ______________________________________________
            (3)  Per unit price or other underlying value of transaction
                 computed pursuant to Exchange Act Rule 0-11 (Set forth
                 the amount on which the filing fee is calculated and
                 state how it was determined): _________________________
            (4)  Proposed maximum aggregate value of transaction: ______
            (5)  Total fee paid: _______________________________________

       [   ]Fee paid previously with preliminary materials.

       [   ]Check box if any part of the fee is offset as provided by
            Exchange Act Rule 0-11(a)(2) and identify the filing for
            which the offsetting fee was paid previously.  Identify the
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<PAGE>





            previous filing by registration statement number, or the
            Form or Schedule and the date of its filing.
            (1)  Amount Previously Paid: _______________________________
            (2)  Form, Schedule or Registration Statement No.: _________
            (3)  Filing Party: _________________________________________
            (4)  Date Filed: ___________________________________________

       Notes:
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<PAGE>















       THERMO BIOANALYSIS CORPORATION
       504 Airport Road
       Santa Fe, New Mexico  87504-2108


       April 29, 1997
        
       Dear Stockholder:
        
            The enclosed Notice calls the 1997 Annual Meeting of the
       Stockholders of Thermo BioAnalysis Corporation.   I respectfully
       request all Stockholders attend this meeting, if possible.  

            Our Annual Report for the year ended December 28, 1996, is
       enclosed. I hope you will read it carefully. Feel free to forward
       any questions you may have if you are unable to be present at the
       meeting. 
        
            Enclosed with this letter is a proxy authorizing three
       officers of the Corporation to vote your shares for you if you do
       not attend the meeting. Whether or not you are able to attend the
       meeting, I urge you to complete your proxy and return it to our
       transfer agent, American Stock Transfer and Trust Company, in the
       enclosed addressed, postage-paid envelope, as a quorum of the
       Stockholders must be present at the meeting, either in person or
       by proxy. 
        
            I would appreciate your immediate attention to the mailing
       of this proxy.
        
                                Yours very truly,





                                BARRY S. HOWE
                                 President and Chief Executive Officer
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<PAGE>









       THERMO BIOANALYSIS CORPORATION
       504 Airport Road
       Santa Fe, New Mexico  87504-2108



       April 29, 1997

       To the Holders of the Common Stock of
         THERMO BIOANALYSIS CORPORATION

       NOTICE OF ANNUAL MEETING

            The 1997 Annual Meeting of the Stockholders of Thermo
       BioAnalysis Corporation (the "Corporation") will be held on
       Monday, June 2, 1997, at 10:00 a.m. at The Hyatt Regency Hotel,
       Hilton Head, South Carolina.  The purpose of the meeting is to
       consider and take action upon the following matters: 
        
       1.   Election of eight directors.

       2.   A proposal recommended by the Board of Directors to adopt an
       employees' stock purchase plan and to reserve 50,000 shares of
       the Corporation's Common Stock for issuance thereunder.
        
       3.   Such other business as may properly be brought before the
       meeting and any adjournment thereof. 
        
            The transfer books of the Corporation will not be closed
       prior to the meeting, but, pursuant to appropriate action by the
       Board of Directors, the record date for the determination of the
       Stockholders entitled to notice of and vote at the meeting is
       April 7, 1997. 
        
            The By-laws require that the holders of a majority of the
       stock issued and outstanding and entitled to vote be present or
       represented by proxy at the meeting in order to constitute a
       quorum for the transaction of business. It is important that your
       shares be represented at the meeting regardless of the number of
       shares you may hold. Whether or not you are able to be present in
       person, please sign and return promptly the enclosed proxy in the
       accompanying envelope, which requires no postage if mailed in the
       United States.  

            This Notice, the proxy and proxy statement enclosed herewith
       are sent to you by order of the Board of Directors. 
        
                                          SANDRA L. LAMBERT
                                                   Secretary

                                        2
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<PAGE>






       PROXY STATEMENT

            The enclosed proxy is solicited by the Board of Directors of
       Thermo BioAnalysis Corporation (the "Corporation") for use at the
       1997 Annual Meeting of the Stockholders (the "Meeting") to be
       held on Monday, June 2, 1997, at 10:00 a.m. at The Hyatt Regency
       Hotel, Hilton Head, South Carolina, and any adjournment thereof.
       The mailing address of the executive office of the Corporation is
       504 Airport Road, Santa Fe, New Mexico  87504-2108.  This proxy
       statement and the enclosed proxy were first furnished to
       Stockholders of the Corporation on or about May 2, 1997.  

       VOTING PROCEDURES

            The Board of Directors intends to present to the Meeting the
       election of eight directors, constituting the entire Board of
       Directors, as well as one other matter:  a proposal to adopt an
       employees' stock purchase plan and to reserve 50,000 shares of
       common stock of the Corporation, $.01 par value ("Common Stock"),
       for issuance under the employees' stock purchase plan.

            The representation in person or by proxy of a majority of
       the outstanding shares of Common Stock entitled to vote at the
       Meeting is necessary to provide a quorum for the transaction of
       business at the Meeting. Shares can only be voted if the
       Stockholder is present in person or is represented by returning a
       properly signed proxy. Each Stockholder's vote is very important.
       Whether or not you plan to attend the Meeting in person, please
       sign and promptly return the enclosed proxy card, which requires
       no postage if mailed in the United States. All signed and
       returned proxies will be counted towards establishing a quorum
       for the Meeting, regardless of how the shares are voted. 
        
            Shares represented by proxy will be voted in accordance with
       your instructions. You may specify your choice by marking the
       appropriate box on the proxy card. If your proxy card is signed
       and returned without specifying choices, your shares will be
       voted for the management nominees for directors, for the
       management proposal, and as the individuals named as proxy
       holders on the proxy deem advisable on all other matters as may
       properly come before the Meeting. 
        
            In order to be elected a director, a nominee must receive
       the affirmative vote of a majority of the shares of Common Stock
       present and entitled to vote on the election. For the proposal to
       adopt the employees' stock purchase plan, the affirmative vote of
       a majority of shares present in person or represented by proxy,
       and entitled to vote on the matter, is necessary for approval.
       Withholding authority to vote for a nominee for director or an
       instruction to abstain from voting on the proposal will be
       treated as shares present and entitled to vote and, for purposes
       of determining the outcome of the vote, will have the same effect
       as a vote against the nominee or the proposal. With respect to
                                        3
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       the election of directors and the adoption of the employees'
       stock purchase plan, broker "non-votes" will not be treated as
       shares present and entitled to vote on a voting matter and will
       have no effect on the outcome of the vote. A broker "non-vote"
       occurs when a nominee holding shares for a beneficial holder does
       not have discretionary voting power and does not receive voting
       instructions from the beneficial owner. 
        
            A Stockholder who returns a proxy may revoke it at any time
       before the Stockholder's shares are voted at the Meeting by
       written notice to the Secretary of the Corporation received prior
       to the Meeting, by executing and returning a later-dated proxy or
       by voting by ballot at the Meeting. 
        
            The outstanding stock of the Corporation entitled to vote
       (excluding shares held in treasury by the Corporation) as of
       April 7, 1997 consisted of 9,771,500 shares of Common Stock. Only
       Stockholders of record at the close of business on April 7, 1997
       are entitled to vote at the Meeting. Each share is entitled to
       one vote.
        

































                                        4
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       - PROPOSAL 1 -

       ELECTION OF DIRECTORS

            Eight directors are to be elected at the Meeting, each to
       hold office until his successor is chosen and qualified or until
       his earlier resignation, death or removal. 

        Nominees For Directors

            Set forth below are the names of the persons nominated as
       directors, their ages, their offices in the Corporation, if any,
       their principal occupation or employment for the past five years,
       the length of their tenure as directors and the names of other
       public companies in which such persons hold directorships.
       Information regarding their beneficial ownership of the
       Corporation's Common Stock and of the common stock of its parent
       company, Thermo Instrument Systems Inc. ("Thermo Instrument"), a
       manufacturer of analytical, environmental monitoring and process
       control instrumentation, and Thermo Instrument's parent company,
       Thermo Electron Corporation ("Thermo Electron"), a diversified
       high technology company, is reported under the caption "Stock
       Ownership." All of the nominees are currently directors of the
       Corporation. 


       Richard W.K.         Dr. Chapman, 52, has been chairman of the
       Chapman              board and a director of the Corporation
                            since its inception in February 1995.  Dr.
                            Chapman has been the chief executive
                            officer and president of ThermoQuest
                            Corporation, a manufacturer of mass
                            spectrometers and chromatography systems,
                            since June 1995 and a vice president of
                            Thermo Instrument since 1994.  He also
                            served as president of ThermoQuest's
                            Finnigan Corporation subsidiary,  from 1992
                            to 1995.  Dr. Chapman is a director of
                            ThermoQuest Corporation. 

       Elias P.             Dr. Gyftopoulos, 69, has been a director of
       Gyftopoulos          the Corporation since its inception in
                            February 1995.  He is Professor Emeritus at
                            the Massachusetts Institute of Technology,
                            where he was the Ford Professor of
                            Mechanical Engineering and of Nuclear
                            Engineering for more than 20 years prior to
                            his retirement in 1996. Dr. Gyftopoulos is
                            also a director of Thermo Electron, Thermo
                            Cardiosystems Inc., ThermoLase Corporation,
                            Thermo Remediation Inc., ThermoSpectra
                            Corporation, Thermo Voltek Corp. and Trex
                            Medical Corporation.
                                        5
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       Denis A. Helm        Mr. Helm, 58, has been vice chairman of the
                            board and a director of the Corporation
                            since its inception in February 1995.  Mr.
                            Helm has been the chief executive officer
                            of Metrika Systems Corporation, a
                            manufacturer of on-line industrial process
                            optimization systems, since its formation
                            in November 1996 and a senior vice
                            president of Thermo Instrument since 1994.
                            He has also been president of Thermo
                            Instrument's Thermo Environmental
                            Instruments Inc. subsidiary, an
                            environmental instruments company, since
                            1981.  Mr. Helm was a vice president of
                            Thermo Instrument from 1986 until 1994.

       Barry S. Howe        Mr. Howe, 41, has been the chief executive
                            officer, president and a director of the
                            Corporation since its inception in February
                            1995.  Mr. Howe has been a vice president
                            of Thermo Instrument since 1994.  From
                            September 1989 to December 1995, he served
                            as the president of Thermo Separation
                            Products Inc. and its predecessor, a
                            manufacturer of chromatography instruments
                            and a subsidiary of ThermoQuest
                            Corporation.
       Earl R. Lewis        Mr. Lewis, 53, has been a director of the
                            Corporation since April 1997.  Mr. Lewis
                            has been president and chief operating
                            officer of Thermo Instrument since March
                            1997 and January 1996, respectively, was
                            executive vice president of Thermo
                            Instrument from January 1996 to March 1997,
                            was a senior vice president of Thermo
                            Instrument from January 1994 to January
                            1996, and was a vice president of Thermo
                            Instrument from March 1992 to January 1994.
                            He has also been the chief executive
                            officer of Thermo Optek Corporation, a
                            manufacturer of analytical instruments and
                            a majority-owned subsidiary of Thermo
                            Instrument, since its inception in August
                            1995, and was president of Thermo Optek
                            Corporation from August 1995 to March 1997.
                             Prior to August 1995, he was president of
                            Thermo Jarrell Ash Corporation, a
                            subsidiary of Thermo Optek Corporation, for
                            more than five years.  Mr. Lewis is also a
                            director of Thermo Optek Corporation,
                            ThermoQuest Corporation, ThermoSpectra
                            Corporation and Trex Medical Corporation.


                                        6
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       Jonathan W. Painter  Mr. Painter, 38, has been a director of the
                            Corporation since its inception in February
                            1995.  Mr. Painter has been treasurer of
                            the Corporation and Thermo Electron since
                            August 1994.  Mr. Painter had served as
                            director of strategic planning of Thermo
                            Electron's Thermo Fibertek Inc. subsidiary,
                            a supplier of paper-recycling equipment,
                            papermaking systems and accessories, from
                            February 1993 through September 1994.
                            Prior to that time, Mr. Painter was
                            associate general counsel of Thermo
                            Electron and its subsidiaries.  Mr. Painter
                            is also a director of Thermo Fibergen Inc.

       Arvin H. Smith       Mr. Smith, 67, has been a director of the
                            Corporation since its inception in February
                            1995.  Mr. Smith has been the chairman of
                            the board and chief executive officer of
                            Thermo Instrument since March 1997 and
                            1986, respectively, and the president of
                            Thermo Instrument from 1986 to March 1997.
                            He also has been an executive vice
                            president of Thermo Electron since 1991 and
                            was a senior vice president of Thermo
                            Electron from 1986 to 1991. Mr. Smith is
                            also a director of Thermo Instrument,
                            Thermo Optek Corporation, Thermo Power
                            Corporation, ThermoQuest Corporation and
                            ThermoSpectra Corporation.
       Arnold N. Weinberg   Dr. Weinberg, 67, has been a director of
                            the Corporation since November 1995.  He
                            has been Professor of Medicine at the
                            Harvard Medical School and Medical Director
                            of the Medical Department of the
                            Massachusetts Institute of Technology for
                            more than five years.
        Committees of the Board of Directors and Meetings

            The Board of Directors has established an Audit Committee
       and a Human Resources Committee, each consisting solely of
       outside directors. The present members of the Audit Committee are
       Dr. Gyftopoulos and Dr. Weinberg (Chairman).  The Audit Committee
       reviews the scope of the audit with the Corporation's independent
       public accountants and meets with them for the purpose of
       reviewing the results of the audit subsequent to its completion.
       The present members of the Human Resources Committee are Dr.
       Gyftopoulos (Chairman) and Dr. Weinberg. The Human Resources
       Committee reviews the performance of senior members of
       management, recommends executive compensation and administers the
       Corporation's stock option and other stock-based compensation
       plans. The Corporation does not have a nominating committee of
       the Board of Directors. The Board of Directors met seven times,

                                        7
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       the Audit Committee met twice and the Human Resources Committee
       met five times during fiscal 1996. Each director attended at
       least 75% of all meetings of the Board of Directors and
       committees on which he served held during fiscal 1996.


















































                                        8
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       Compensation of Directors

       Cash Compensation

            Directors who are not employees of the Corporation, of
       Thermo Electron or of any other companies affiliated with Thermo
       Electron (also referred to as "outside directors") receive an
       annual retainer of $2,000 and a fee of $1,000 per day for
       attending regular meetings of the Board of Directors and $500 per
       day for participating in meetings of the Board of Directors held
       by means of conference telephone and for participating in certain
       meetings of committees of the Board of Directors.  Payment of
       directors' fees is made quarterly.  Dr. Chapman and Messrs. Helm,
       Howe, Lewis, Painter and Smith are all employees of Thermo
       Electron companies and do not receive any cash compensation from
       the Corporation for their services as directors.  Directors are
       also reimbursed for out-of-pocket expenses incurred in attending
       such meetings.
       Deferred Compensation Plan

            Under the Deferred Compensation Plan for directors (the
       "Deferred Compensation Plan"), a director has the right to defer
       receipt of his cash fees until he ceases to serve as a director,
       dies or retires from his principal occupation. In the event of a
       change in control or proposed change in control of the
       Corporation that is not approved by the Board of Directors,
       deferred amounts become payable immediately. Either of the
       following is deemed to be a change of control: (a) the
       occurrence, without the prior approval of the Board of Directors,
       of the acquisition, directly or indirectly, by any person of 50%
       or more of the outstanding Common Stock or the outstanding common
       stock of Thermo Instrument or 25% or more of the outstanding
       common stock of Thermo Electron; or (b) the failure of the
       persons serving on the Board of Directors immediately prior to
       any contested election of directors or any exchange offer or
       tender offer for the Common Stock or the common stock of Thermo
       Instrument or Thermo Electron to constitute a majority of the
       Board of Directors at any time within two years following any
       such event. Amounts deferred pursuant to the Deferred
       Compensation Plan are valued at the end of each quarter as units
       of the Corporation's Common Stock. When payable, amounts deferred
       may be disbursed solely in shares of Common Stock accumulated
       under the Deferred Compensation Plan. A total of 25,000 shares of
       Common Stock have been reserved for issuance under the Deferred
       Compensation Plan. As of March 1, 1997, deferred units equal to
       371.57 shares of Common Stock were accumulated under the Deferred
       Compensation Plan.   

       Directors Stock Option Plan

            The Corporation's directors stock option plan (the
       "Directors Plan") provides for the grant of stock options to
       purchase shares of common stock of the Corporation to outside
       directors as additional compensation for their service as
                                        9
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       directors.  The Directors Plan provides for the grant of stock
       options upon a director's initial appointment and, beginning in
       2000, awards options to purchase 1,000 shares annually to outside
       directors.  A total of 100,000 shares of Common Stock have been
       reserved for issuance under the Directors Plan.

            Under the Directors Plan, each eligible director and each
       new outside director who joined the Board of Directors prior to
       or during 1996 was granted an option to purchase 15,000 shares of
       Common Stock.  The size of the award to new directors appointed
       to the Board of Directors after 1996 is reduced by 3,750 shares
       in each subsequent year.  Outside directors who join the Board of
       Directors after 1999 would not receive an option grant upon their
       appointment or election to the Board of Directors, but would be
       eligible to participate in the annual option awards described
       below.  Options evidencing initial grants to directors are
       exercisable six months after the date of grant.  The shares
       acquired upon exercise are subject to restrictions on transfer
       and the right of the Corporation to repurchase such shares at the
       exercise price in the event the director ceases to serve as a
       director of the Corporation or any other Thermo Electron company.
       The restrictions and repurchase rights lapse or are deemed to
       have lapsed in equal annual installments of 3,750 shares per
       year, starting with the first anniversary of the grant date,
       provided the director has continuously served as a director of
       the Corporation or any other Thermo Electron company since the
       grant date.  These options expire on the fifth anniversary of the
       grant date, unless the director dies or otherwise ceases to serve
       as a director of the Corporation or any other Thermo Electron
       company prior to that date.

            Outside directors will also receive an annual grant of
       options to purchase 1,000 shares of Common Stock, commencing with
       the Annual Meeting of the Stockholders to be held in 2000.  The
       annual grant will be made at the close of business on the date of
       each Annual Meeting of the Stockholders of the Corporation to
       each outside director then holding office.  Options evidencing
       annual grants may be exercised at any time from and after the
       six-month anniversary of the grant date of the option and prior
       to the expiration of the option on the third anniversary of the
       grant date.  Shares acquired upon exercise of the options would
       be subject to repurchase by the Corporation at the exercise price
       if the recipient ceased to serve as a director of the Corporation
       or any other Thermo Electron company prior to the first
       anniversary of the grant date.

            The exercise price for options granted under the Directors
       Plan is the average of the closing prices of the common stock as
       reported on the American Stock Exchange (or other principal
       market on which the common stock is then traded) for the five
       trading days preceding and including the date of grant, or, if
       the shares are not then traded, at the last price per share paid
       by third parties in an arms-length transaction prior to the
       option grant.  As of March 1, 1997, options to purchase 30,000
                                       10
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       shares had been granted and were outstanding under the Directors
       Plan, no options had lapsed or been exercised, and options to
       purchase 70,000 shares of Common Stock were available for future
       grant under the Directors Plan. 

       Stock Ownership Policies for Directors

            During 1996, the Human Resources Committee of the Board of
       Directors (the "Committee") established a stock holding policy
       for directors.   The stock holding policy requires each director
       to hold a minimum of 1,000 shares of Common Stock.  Directors are
       requested to achieve this ownership level by the 1998 Annual
       Meeting of Stockholders.  Directors who are also executive
       officers of the Corporation are required to comply with a
       separate stock holding policy established by the Committee in
       1996, which is described in "Committee Report on Executive
       Compensation - Stock Ownership Policies."

            In addition, the Committee adopted a policy requiring
       directors to hold shares of the Corporation's Common Stock equal
       to one-half of their net option exercises over a period of five
       years.  The net option exercise is determined by calculating the
       number of shares acquired upon exercise of a stock option, after
       deducting the number of shares that could have been traded to
       exercise the option and the number of shares that could have been
       surrendered to satisfy tax withholding obligations attributable
       to the exercise of the option.  This policy is also applicable to
       executive officers and is described in "Committee Report on
       Executive Compensation -  Stock Ownership Policies."

       STOCK OWNERSHIP

            The following table sets forth the beneficial ownership of
       Common Stock, as well as the common stock of Thermo Instrument,
       the Corporation's parent company, and of Thermo Electron, Thermo
       Instrument's parent company, as of March 1, 1997, with respect to
       (i) each person who was known by the Corporation to own
       beneficially more than 5% of the outstanding shares of Common
       Stock, (ii) each director, (iii) each executive officer named in
       the summary compensation table under the heading "Executive
       Compensation" and (iv) all directors and current executive
       officers as a group.

            While certain directors and executive officers of the
       Corporation are also directors and executive officers of Thermo
       Instrument or its subsidiaries other than the Corporation, all
       such persons disclaim beneficial ownership of the shares of
       Common Stock owned by Thermo Instrument.


       
<TABLE>

<CAPTION>



                                 Thermo        Thermo       Thermo
                              BioAnalysis    Instrument    Electron
              Name (1)        Corporation   Systems Inc. Corporation
                                  (2)           (3)          (4)

                 <S>              <C>           <C>          <C>

        Thermo Instrument        9,530,303            N/A        N/A
        Systems Inc. (5)

        Richard W. K. Chapman       40,500        139,087     82,126

        Elias P. Gyftopoulos        15,000         47,018     71,070

        Donald W. Hanna             21,000         15,506     22,216

        Denis A. Helm               15,000        161,729    164,378

        Barry S. Howe               64,300         99,886     81,048

        Earl R. Lewis               56,000        128,233    124,184

        Jonathan W. Painter         15,000          5,782     33,271

        Arvin H. Smith              39,000        431,667    513,038

        Arnold N. Weinberg          15,371              0          0

        All directors and
        current executive
        officers as a group        312,171      1,128,804  1,763,097
        (11 persons)

</TABLE>


                                       11
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       (1)  Except as reflected in the footnotes to this table, shares
       beneficially owned consist of shares owned by the indicated
       person or by that person for the benefit of minor children and
       all share ownership includes sole voting and investment power. 
        
       (2)  Shares of the Common Stock beneficially owned by Dr.
       Chapman, Dr. Gyftopoulos, Mr. Hanna, Mr. Helm, Mr. Howe, Mr.
       Lewis, Mr. Painter, Mr. Smith, Dr. Weinberg and all directors and
       executive officers as a group include 30,000, 15,000, 21,000,
       15,000, 50,000, 50,000, 15,000, 20,000, 15,000 and 249,000
       shares, respectively, that such person or group has the right to
       acquire within 60 days of March 1, 1997, through the exercise of
       stock options.   Shares of the Common Stock beneficially owned by
       Dr. Weinberg and all directors and executive officers as a group
       include 371 full shares allocated to Dr. Weinberg's account under
       the Corporation's deferred compensation plan for directors.  No
       director or executive officer beneficially owned more than 1% of
       the Common Stock outstanding as of March 1, 1997; all directors
       and executive officers as a group beneficially owned 3.1% of the
       Common Stock outstanding as of such date. 

       (3)  Shares of the common stock of Thermo Instrument beneficially
       owned by Dr. Chapman, Dr. Gyftopoulos, Mr. Hanna, Mr. Helm, Mr.
       Howe, Mr. Lewis, Mr. Painter, Mr. Smith and all directors and
       executive officers as a group include 121,287, 14,465, 15,000,
       112,500, 89,062, 112,500, 5,625, 234,375 and 785,439 shares,
       respectively, that such person or group had the right to acquire
       within 60 days after March 1, 1997, through the exercise of stock
       options. Shares of the common stock of Thermo Instrument
       beneficially owned by Mr. Painter, Mr. Smith and all directors
       and executive officers as a group include 157, 530 and 1,612
       shares, respectively, allocated through March 1, 1997, to their
       respective accounts maintained pursuant to Thermo Electron's
       employee stock ownership plan, of which the trustees, who have
       investment power over its assets, are executive officers of
       Thermo Electron (the "ESOP").  Shares of the common stock of
       Thermo Instrument beneficially owned by Mr. Helm include a total
       of 4,212 shares held by him as custodian for four minor children.
       Shares of the common stock of Thermo Instrument beneficially
       owned by Mr. Howe include 1,968 shares held in a trust of which
       he is trustee.  Shares of the common stock of Thermo Instrument
       beneficially owned by Mr. Lewis include 2,390 shares held by his
       spouse.  No director or executive officer beneficially owned more
       than 1% of the common stock of Thermo Instrument outstanding as
       of March 1, 1997; all directors and executive officers as a group
       beneficially owned 1.2% of the common stock of Thermo Instrument
       outstanding as of such date.
        
       (4)  The shares of the common stock of Thermo Electron shown in
       the table reflect a three-for-two split of such stock distributed
       in June 1996 in the form of a 50% stock dividend. Shares of the
       common stock of Thermo Electron beneficially owned by Dr.
       Chapman, Dr. Gyftopoulos, Mr. Hanna, Mr. Helm, Mr. Howe, Mr.
       Lewis, Mr. Painter, Mr. Smith and all directors and executive
                                       12
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       officers as a group include 80,284, 9,375, 20,098, 106,347,
       73,287, 121,536, 27,035, 222,411 and 1,187,632 full shares,
       respectively, that such person or group has the right to acquire
       within 60 days of March 1, 1997, through the exercise of stock
       options. Shares of the common stock of Thermo Electron
       beneficially owned by Mr. Painter, Mr. Smith and all directors
       and executive officers as a group include 488, 1,717 and 5,463
       full shares, respectively, allocated to accounts maintained
       pursuant to the ESOP.  No director or executive officer
       beneficially owned more than 1% of the common stock of Thermo
       Electron outstanding as of March 1, 1997; all directors and
       executive officers as a group beneficially owned approximately
       1.2% of the Thermo Electron common stock outstanding as of such
       date. 
                
       (5)  Includes 3,030,303 shares of Common Stock that Thermo
       Instrument has the right to acquire within 60 days of March 1,
       1997, through the conversion of a convertible note of the
       Corporation issued to Thermo Instrument in July 1996.  As of
       March 1, 1997, Thermo Instrument beneficially owned 74% of the
       outstanding Common Stock. Thermo Instrument's address is 1275
       Hammerwood Avenue, Sunnyvale, California 94089.  As of March 1,
       1997, Thermo Instrument had the power to elect all of the members
       of the Corporation's Board of directors.  Thermo Instrument is a
       majority owned subsidiary of Thermo Electron and therefore,
       Thermo Electron may be deemed the beneficial owner of the shares
       of Common Stock beneficially owned by Thermo Instrument.  Thermo
       Electron disclaims beneficial ownership of these shares.

       Section 16(a) Beneficial Ownership Reporting Compliance

            Section 16(a) of the Securities Exchange Act of 1934
       requires the Corporation's directors and executive officers, and
       beneficial owners of more than 10% of the Common Stock, such as
       Thermo Electron, to file with the Securities and Exchange
       Commission initial reports of ownership and periodic reports of
       changes in ownership of the Corporation's securities. Based upon
       a review of such filings, all Section 16(a) filing requirements
       applicable to such persons were complied with during 1996, except
       in the following instances.  Thermo Instrument filed two Forms 4
       late, reporting a total of two transactions, consisting of one
       grant of options to employees to purchase the  Common Stock under
       Thermo Instrument's stock option plans and the expiration without
       exercise of one such option.  Thermo Electron filed four Forms 4
       late, reporting a total of nine transactions, including the two
       transactions described above for Thermo Instrument and, in
       addition, five open market purchases of Common Stock, one grant
       of options to employees to purchase the Common Stock under Thermo
       Electron's stock option plans and the expiration without exercise
       of one such option.

       EXECUTIVE COMPENSATION

       NOTE:  All share amounts reported below have, in all cases, been
                                       13
PAGE
<PAGE>





       adjusted as applicable to reflect a three-for-two stock split
       with respect to the common stock of Thermo Electron distributed
       in June 1996 in the form of a 50% stock dividend.

       Summary Compensation Table

            The following table summarizes compensation for services to
       the Corporation in all capacities awarded to, earned by or paid
       to the Corporation's chief executive officer and one other
       executive officer for the last two fiscal years.  No other
       executive officer of the Corporation met the definition of
       "highly compensated" within the meaning of the Securities and
       Exchange Commission's executive compensation disclosure rules. 
        
            The Corporation is required to appoint certain executive
       officers and full-time employees of Thermo Electron as executive
       officers of the Corporation, in accordance with the Thermo
       Electron Corporate Charter. The compensation for these executive
       officers is determined and paid entirely by Thermo Electron. The
       time and effort devoted by these individuals to the Corporation's
       affairs is provided to the Corporation under the Corporate
       Services Agreement between the Corporation and Thermo Electron.
       Accordingly, the compensation for these individuals is not
       reported in the following table.

       


<TABLE>

<CAPTION>


                              Summary Compensation Table


                                                    Long Term
                                                   Compensation
                                                    Securities
                                                    Underlying
                                   Annual        Options (No. of
           Name and    Fiscal   Compensation          Shares        All Other
           Principal    Year   Salary   Bonus    and Company) (1)  Compensation
           Position                                                    (2)

        <S>            <C>    <C>     <C>             <C>               <C>

        Barry S. Howe   1996  $145,000  $70,000    50,000(TBA)       $8,076 (3)

          President and                             1,500(TMO)

          Chief                                     2,000(TFG)
        Executive                                   
        Officer                                     2,000(TLT)

                                                   15,000(TOC)                  

                                                   90,000(TMQ)

                                                    2,000(TSR)

                                                    4,000(TXM)

                        1995  $134,000  $65,000     1,650(TMO)       $7,517

                                                    5,000(TLZ)


        Donald W. Hanna 1996  $100,000  $19,500    21,000(TBA)       $5,310

          Vice                                      7,500(TOC)
        President
                                                    5,000(TMQ)

                        1995   $95,000  $18,000        --            $7,461











</TABLE>


       (1)  In addition to receiving options to purchase Common Stock
       (designated in the table as TBA), executive officers of the
       Corporation have been granted options to purchase common stock of
       Thermo Electron and certain of Thermo Electron's other
       subsidiaries as part of Thermo Electron's stock option program.
       Options have been granted during the last two fiscal years to the
       named executive officers in the following Thermo Electron
       companies:  Thermo Electron (designated in the table as TMO),
       Thermo Fibergen Inc. (designated in the table as TFG), ThermoLase
       Corporation (designated in the table as TLZ), ThermoLyte
       Corporation (designated in the table as TLT), Thermo Optek
       Corporation (designated in the table as TOC), ThermoQuest
       Corporation (designated in the table as TMQ), Thermo Sentron Inc.
       (designated in the table as TSR) and Trex Medical Corporation
       (designated in the table as TXM).

       (2)  Represents the amount of matching contributions made on
       behalf of the named executive officer by the individual's
       employer pursuant to the Thermo Electron 401(k) plan.

       (3)  In addition to the matching contribution referred to in
       footnote (2), such amount includes $1,444, which represents the
       amount of compensation attributable to an interest-free loan
       provided to Mr. Howe pursuant to the company's stock holding
       assistance plan.  See "Relationship with Affiliates - Stock
                                       14
PAGE
<PAGE>





       Holding Assistance Plan".

       Stock Options Granted During Fiscal 1996

            The following table sets forth information concerning
       individual grants of stock options made during fiscal 1996 to the
       Corporation's chief executive officer and the other named
       executive officer.  It has not been the Corporation's policy in
       the past to grant stock appreciation rights, and no such rights
       were granted during fiscal 1996. 

       


<TABLE>


<CAPTION>


                                   Option Grants in Fiscal 1996


                                                                           Potential
                                                                           Realizable
                                        Percent of                      Value at Assumed
                                          Total                         Annual Rates of
                                         Options                             Stock
                           Number of    Granted to                     Price Appreciation
                           Securities              Exercise                   for
                           Underlying   Employees   Price    Expira-    Option Term (2)
                            Options         in       Per      tion

              Name        Granted (1)  Fiscal Year  Share     Date       5%        10%

              <S>              <C>         <C>       <C>       <C>       <C>       <C>

        Barry S. Howe       50,000(TBA)   8.6%       $10.00  01/31/08  $398,000 $1,069,000

                             1,500(TMO)   0.1% (3)   $42.79  05/22/99   $10,110    $21,240

                             2,000(TFG)   0.4% (3)   $10.00  09/12/08   $15,920    $42,760

                             2,000(TLT)   0.6% (3)   $10.00  03/11/08   $15,920    $42,760

                            15,000(TOC)   0.5% (3)   $12.00  04/11/08  $143,250   $384,900

                            90,000(TMQ)   3.2% (3)   $13.00  01/10/08  $931,500 $2,502,000

                             2,000(TSR)   0.4% (3)   $14.00  03/11/08   $22,280    $59,880

                             4,000(TXM)   0.2% (3)   $11.00  03/11/08   $35,000    $94,080


        Donald W. Hanna     21,000(TBA)   3.6%       $10.00  01/31/08  $167,160   $448,980

                             7,500(TOC)   0.2% (3)   $12.00  04/11/08   $71,625   $192,450

                             5,000(TMQ)   0.2% (3)   $13.00  02/08/08   $51,750   $139,000

</TABLE>


       (1)  All of the options granted during the fiscal year are
       immediately exercisable as of the end of the fiscal year, except
       options to purchase shares of the common stock of ThermoLyte
       Corporation (designated in the table as TLT), which are not
       exercisable until the earlier of (i) 90 days after the effective
       date of the registration of that company's common stock under
       Section 12 of the Securities Exchange Act of 1934 (the "Exchange
       Act") and (ii) nine years after the grant date.  In all cases,
       the shares acquired upon exercise are subject to repurchase by
       the granting corporation at the exercise price in the optionee
       ceases to be employed by the granting corporation or another
       Thermo Electron company.  The granting corporation may exercise
       its repurchase rights within six months after the termination of
       the optionee's employment.  For publicly traded companies, the
       repurchase rights generally lapse ratably over a five- to
       ten-year period, depending on the option term, which may vary
       from seven to twelve years, provided that the optionee continues
       to be employed by the granting corporation or another Thermo
       Electron company.  For companies that are not publicly traded,
       the repurchase rights lapse in their entirety on the ninth
       anniversary of the grant date.  Certain options granted as a part
       of Thermo Electron's stock option program have three-year terms,
       and the repurchase rights lapse in their entirety on the second
       anniversary of the grant date.  The granting corporation may
       permit the holders of options to exercise options and satisfy tax
       withholding obligations by surrendering shares equal in fair
       market value to the exercise price or withholding obligation.

       (2)  The amounts shown on this table represent hypothetical gains
       that could be achieved for the respective options if exercised at
       the end of the option term.  These gains are based on assumed
       rates of stock appreciation of 5% and 10%, compounded annually
       from the date the respective options were granted to their
       expiration date.  The gains shown are net of the option exercise
       price, but do not include deductions for taxes or other expenses
       associated with the exercise.  Actual gains, if any, on stock
       option exercises will depend on the future performance of the
       common stock of the granting corporation, the option holders'
       continued employment through the option period and the date on
                                       15
PAGE
<PAGE>





       which the options are exercised.

       (3)  These options were granted under stock option plans
       maintained by Thermo Electron companies other than the
       Corporation and accordingly are reported as a percentage of total
       options granted to employees of Thermo Electron and its
       subsidiaries. 















































                                       16
PAGE
<PAGE>





       Stock Options Exercised During Fiscal 1996 and Fiscal Year-End
       Option Values

            The following table reports certain information regarding
       stock option exercises during fiscal 1996 and outstanding stock
       options held at the end of fiscal 1996 by the Corporation's chief
       executive officer and the other named executive officers. No
       stock appreciation rights were exercised or were outstanding
       during fiscal 1996.

       


<TABLE>

<CAPTION>



                         Aggregated Option Exercises In Fiscal 1996 And 
                               Fiscal 1996 Year-End Option Values



                                                          Number of
                                                         Unexercised        Value of
                                                         Options at       Unexercised
                                       Shares               Fiscal
                                      Acquired             Year-End       In-the-Money
                                         on     Value   (Exercisable/
              Name          Company   Exercise Realized Unexercisable)      Options
                                                             (1)
        <S>             <C>           <C>      <C>           <C>              <C>

        Barry S. Howe   Thermo              --       --  50,000 /0       $156,250 /--
                        BioAnalysis

                        Thermo              --       --  73,287 /0(2)  $1,428,259 /--
                        Electron

                        Thermedics          --       --   4,000 /0         $9,100 /--

                        Thermo Ecotek    5,250  $48,127   6,000 /0        $61,500 /--

                        Thermo              --       --   2,000 /0         $1,500 /--
                        Fibergen

                        Thermo              --       --  15,750 /0        $64,890 /--
                        Fibertek

                        Thermo              --       --  89,062 /0     $1,561,042 /--
                        Instrument

                        ThermoLase          --       --   5,000 /0             $0 /--

                        ThermoLyte          --       --      -- /2,000         -- /$0(3)

                        Thermo Optek        --       --  15,000 /0             $0 /--

                        Thermo Power        --       --   4,000 /0             $0 /--

                        ThermoQuest         --       --  90,000 /--            $0 /--

                        Thermo              --       --   2,000 /0             $0 /--
                        Sentron

                        ThermoSpectra       --       --   4,000 /0         $7,500 /--

                        Thermo              --       --   4,000 /0         $3,880 /--
                        TerraTech

                        ThermoTrex       1,350  $55,755   4,000 /0        $51,700 /--

                        Trex Medical        --       --   4,000 /0         $6,500 /--


        Donald W. Hanna Thermo              --       --  21,000 /0        $65,625 /--
                        BioAnalysis

                        Thermo           1,275  $39,895  20,098 /0(2)    $420,940 /--
                        Electron

                        Thermo Ecotek    3,000  $21,249      -- /--            -- /--

                        Thermo              --       --  15,000 /0       $251,626 /--
                        Instrument

                        Thermo Optek        --       --   7,500 /0             $0 /--

                        ThermoQuest         --       --   5,000 /0             $0 /--

                        ThermoSpectra       --       --   1,500 /0         $2,813 /--

                        ThermoTrex         405  $17,942      -- /--            -- /--

















</TABLE>

        
       (1)  All of the options reported outstanding at the end of the
       fiscal year were immediately exercisable, except the options to
       purchase shares of the common stock of ThermoLyte Corporation,
       which are not exercisable until the earlier of (i) 90 days after
       the effective date of the registration of that company's common
       stock under Section 12 of the Exchange Act and (ii) nine years
       after the grant date.  In all cases, the shares acquired upon
       exercise price of the options reported in the table are subject
       to repurchase by the granting corporation at the exercise price
       if the optionee ceases to be employed by such corporation or
       another Thermo Electron company.   The granting corporation may
       exercise its repurchase rights within six months after the
       termination of the optionee's employment.  For companies whose
       shares are not publicly traded, the repurchase rights lapse in
       their entirety on the ninth anniversary of the grant date.  For
       publicly traded companies, the repurchase rights generally lapse
       ratably over a five- to ten-year period, depending on the option
       term, which may vary from seven to twelve years, provided that
       the optionee continues to be employed by the granting corporation
       or another Thermo Electron company.

       (2)  Options to purchase 22,500 and 11,250 shares of the common
       stock of Thermo Electron granted to Mr. Howe and Mr. Hanna,
       respectively, are subject to the same terms described in footnote
       (1), except that the repurchase rights of the granting
       corporation generally do not lapse until the tenth anniversary of
       the grant date.  In the event of the employee's death or
       involuntary termination prior to the tenth anniversary of the
       grant date, the repurchase rights of the granting corporation
       shall be deemed to have lapsed ratably over a five-year period
       commencing with the fifth anniversary of the grant date.

       (3)  No public market existed for the shares underlying these
       options as of December 28, 1996.  Accordingly, no value in excess
       of the exercise price has been attributed to these options.

         COMMITTEE REPORT ON EXECUTIVE COMPENSATION

       Executive Compensation

                                       17
PAGE
<PAGE>





            All decisions on compensation for the Corporation's
       executive officers are made by the Human Resources Committee of
       the Board of Directors (the "Committee"). In reviewing and
       establishing total cash compensation and stock-based compensation
       for executives, the Committee follows guidelines established by
       the Human Resources Committees of the Board of Directors of its
       parent corporations, Thermo Electron and Thermo Instrument. The
       executive compensation program presently consists of annual base
       salary ("salary"), short-term incentives in the form of annual
       cash bonuses, and long-term incentives in the form of stock
       options. 
        
            The Committee believes that the compensation of executive
       officers should reflect the scope of their responsibilities, the
       success of the Corporation, and the contributions of each
       executive to that success. In addition, the Committee believes
       that base salaries should approximate the mid-point of
       competitive salaries derived from market surveys and that
       short-term and long-term incentive compensation should reflect
       the performance of the Corporation and the contributions of each
       executive. 
        
            External competitiveness is an important element of the
       Committee's compensation policy. The competitiveness of the
       Corporation's compensation for its executives is assessed by
       comparing it to market data provided by its compensation
       consultant and by participating in annual executive compensation
       surveys, primarily "Project 777," an executive compensation
       survey prepared by Management Compensation Services, a division
       of Hewitt Associates. The majority of firms represented in the
       Project 777 survey are included in the Standard & Poor's 500
       Index, but do not necessarily correspond to the companies
       included in the Corporation's peer group index, the Dow Jones
       Total Return Index for the Diversified Technology Industry Group.
        
            Principles of internal equity are also central to the
       Committee's compensation policies. Compensation considered for
       the Corporation's officers, whether cash or stock-based
       incentives, is also evaluated by comparing it to compensation of
       other executives within the Thermo Electron organization with
       comparable levels of responsibility for comparably sized business
       units. 
        
            The process for determining each of these elements for the
       Corporation's executive officers is outlined below. 

       Base Salary

            Base salaries are intended to approximate the mid-point of
       competitive salaries for similar organizations of comparable size
       and complexity to the Corporation. Executive salaries are
       adjusted gradually over time and only as necessary to meet this
       objective. Increases in base salary may be moderated by other
       considerations, such as geographic or regional market data,
                                       18
PAGE
<PAGE>





       industry trends or internal fairness within the Corporation and
       Thermo Electron. It is the Committee's intention that over time
       the base salaries for the chief executive officer and the other
       named executive officers will approach the mid-point of
       competitive data. The salary increases in 1996 for the chief
       executive officer and the other named executive officers
       generally reflect this practice of gradual increases and
       moderation. 

        Cash Bonus

            The Committee establishes a median potential bonus for each
       executive by using the market data on total cash compensation
       from the same executive compensation surveys as used to determine
       salaries. Specifically, the median potential bonus plus the
       salary of an executive officer is approximately equal to the
       mid-point of competitive total cash compensation for a similar
       position and level of responsibility in businesses having
       comparable sales and complexity to the Corporation. The actual
       bonus awarded to an executive officer may range from zero to
       three times the median potential bonus. The value within the
       range (the bonus multiplier) is determined at the end of each
       year by the Committee in its discretion. The Committee exercises
       its discretion by evaluating each executive's performance using a
       methodology developed by its parent corporation, Thermo Electron,
       and applied throughout the Thermo Electron organization. The
       methodology incorporates measures of operating returns, designed
       to measure profitability and contributions to shareholder value,
       and are measures of corporate and divisional performance that are
       evaluated using graphs developed by Thermo Electron intended to
       reward performance that is perceived as above average and to
       penalize performance that is perceived as below average.  The
       measures of operating returns used in the Committee's
       determinations in fiscal 1996 measured return on net assets,
       growth in income and return on sales, and the Committee's
       determinations also included a subjective evaluation of the
       contributions of each executive that are not captured by
       operating measures but are considered important to the creation
       of long-term value for the Stockholders. These measures of
       achievements are not financial targets that are met, not met or
       exceeded. The relative weighting of the operating measures and
       the subjective evaluation varies among the executives, depending
       on their roles and responsibilities within the organization. 
        
            The bonuses for named executive officers approved by the
       Committee with respect to 1996 performance in each instance
       exceeded the median potential bonus.  

       Stock Option Program

            The primary goal of the Corporation is to excel in the
       creation of long-term value for the Stockholders. The principal
       incentive tool used to achieve this goal is the periodic award to
       key employees of options to purchase common stock of the
                                       19
PAGE
<PAGE>





       Corporation and other Thermo Electron companies. 
        
            The Committee and management believe that awards of stock
       options to purchase the shares of both the Corporation and other
       companies within the Thermo Electron group of companies
       accomplish many objectives. The grant of options to key employees
       encourages equity ownership in the Corporation, and closely
       aligns management's interests to the interests of all the
       Stockholders. The emphasis on stock options also results in
       management's compensation being closely linked to stock
       performance. In addition, because they are subject to vesting
       periods of varying durations and to forfeiture if the employee
       leaves the Corporation prematurely, stock options are an
       incentive for key employees to remain with the Corporation
       long-term. The Committee believes stock option awards in its
       parent companies, Thermo Electron and Thermo Instrument, and the
       other majority-owned subsidiaries of Thermo Electron and Thermo
       Instrument, are an important tool in providing incentives for
       performance within the entire organization. 
        
            In determining awards, the Committee considers the average
       annual value of all options to purchase shares of the Corporation
       and other companies within the Thermo Electron organization that
       vest in the next five years. (Values are established using a
       modified Black-Scholes option pricing model.) As a guideline, the
       Committee strives to maintain the aggregate amount of net awards
       to purchase shares of Common Stock to all employees over a
       five-year period below 12% of the Corporation's outstanding
       common stock, although other factors such as unusual transactions
       and acquisitions and standards for awards of comparably situated
       companies may affect the number of awards granted. 
        
            Awards are not made annually in conjunction with the annual
       review of cash compensation, but are made periodically.   The
       Committee considers total compensation of executives, actual and
       anticipated contributions of each executive (which includes a
       subjective assessment by the Committee of the value of the
       executive's future potential within the organization), as well as
       the value of previously awarded options, as described above, in
       determining option awards.   The option awards made to the named
       executive officers in 1996 with respect to the common stock of
       the majority-owned subsidiaries of the Corporation's parent
       company, Thermo Instrument, were made as part of Thermo
       Electron's overall stock option program and were determined by
       the human resources committee of the board of directors of the
       granting company using a similar analysis.

       Stock Ownership Policies

            During 1996, the Committee established a stock holding
       policy for executive officers of the Corporation.  The stock
       holding policy specifies an appropriate level of ownership of the
       Corporation's Common Stock as a multiple of the officer's
       compensation.  For the chief executive officer, the multiple is
                                       20
PAGE
<PAGE>





       one times his base salary and reference bonus for the calendar
       year.  For all other officers, the multiple is one times the
       officer's base salary.  The Committee deemed it appropriate to
       permit officers to achieve these ownership levels over a
       three-year period.

            In order to assist officers in complying with the policy,
       the Committee also adopted a stock holding assistance plan under
       which the Corporation is authorized to make interest-free loans
       to officers to enable them to purchase shares of the Common Stock
       in the open market.  The loans are required to be repaid upon the
       earlier of demand or the fifth anniversary of the date of the
       loan, unless otherwise authorized by the Committee.  During 1996,
       Dr. Chapman, the Corporation's chairman of the board, and Mr.
       Howe, the Corporation's chief executive officer, received loans
       in the principal amounts of $131,176.30 and $164,375.52,
       respectively, under this plan.  See "Relationship with Affiliates
       - Stock Holding Assistance Plan."

            The Committee also adopted a policy requiring its executive
       officers to hold shares of the Corporation's Common Stock
       acquired upon the exercise of stock options granted by the
       Corporation.  Under this policy, executive officers are required
       to hold one-half of their net option exercises over a period of
       five years.  The net option exercise is determined by calculating
       the number of shares acquired upon exercise of a stock option,
       after deducting the number of shares that could have been traded
       to exercise the option and the number of shares that could have
       been surrendered to satisfy tax withholding obligations
       attributable to the exercise of the options.

       Policy on Deductibility of Compensation

            The Committee has also considered the application of Section
       162(m) of the Internal Revenue Code to the Corporation's
       compensation practices. Section 162(m) limits the tax deduction
       available to public companies for annual compensation paid to
       senior executives in excess of $1 million unless the compensation
       qualifies as "performance based" or is otherwise exempt under
       Section 162(m). The annual compensation paid to individual
       executives does not approach the $1 million threshold, and it is
       believed that stock incentive plans of the Corporation qualify as
       "performance based." Therefore, the Committee does not believe
       any further action is necessary in order to comply with Section
       162(m). From time to time, the Committee will reexamine the
       Corporation's compensation practices and the effect of Section
       162(m). 

       1996 CEO Compensation

            The salary and bonus of  Mr. Howe are established using  the
       same  criteria  as   for  the  salaries   and  bonuses  for   the
       Corporation's other named executive officers.  In determining Mr.
       Howe's compensation as reported, the Committee considered,  among
                                       21
PAGE
<PAGE>





       other  factors,   his   contributions   and   achievement   since
       successfully  completing  an  initial  public  offering  of   the
       Corporation's Common Stock in September 1996.  

            The Committee awarded to Mr. Howe options to purchase 50,000
       shares of the Common Stock in fiscal 1996.  This award was
       determined in a manner consistent with awards to other officers,
       as described above.  In addition to stock option awards by the
       Committee, Mr. Howe may receive awards to purchase shares of the
       common stock of Thermo Electron or Thermo Instrument or any of
       their majority owned subsidiaries from time to time as part of
       Thermo Electron's stock option program due to his position as a
       chief executive officer of a majority owned subsidiary of Thermo
       Electron or due to his position as a vice president of Thermo
       Instrument.  These awards are determined using an analysis
       similar to that used by the Committee as described above under
       "Stock Option Program."  The stock option awards to Mr. Howe in
       fiscal 1996 with respect to shares of the following companies
       were awarded under this program:  Thermo Fibergen Inc.,
       ThermoLyte Corporation, Thermo Optek Corporation, ThermoQuest
       Corporation, Thermo Sentron Inc. and Trex Medical Corporation.
       The award to purchase shares of common stock of Thermo Electron
       granted to Mr. Howe in fiscal 1996 was made by the Thermo
       Electron human resources committee under a program which awards
       options to certain eligible employees annually based on the
       number of shares of the common stock of Thermo Electron held by
       the employee, as an incentive to buy and hold Thermo Electron
       shares.

       Elias P. Gyftopoulos (Chairman)
       Arnold N. Weinberg

       COMPARATIVE PERFORMANCE GRAPH

            The Securities and Exchange Commission requires that the
       Corporation include in this proxy statement a line-graph
       presentation comparing cumulative, five-year shareholder returns
       for the Corporation's Common Stock with a broad-based market
       index and either a nationally recognized industry standard or an
       index of peer companies selected by the Corporation. The
       Corporation's Common Stock has been publicly traded since
       September 18, 1996 and, as a result, the following graph
       commences as of such date. The Corporation has compared its
       performance with the American Stock Exchange Market Value Index
       and the Dow Jones total return Index for the Diversified
       Technology Industry Group.
        
       Comparison of Total Return Among Thermo BioAnalysis Corporation,
       the American Stock Exchange Market Value Index and the Dow Jones
       Total Return Index for the Diversified Technology Industry Group
       from September 18, 1996 to December 27, 1996.


       GRAPH APPEARS HERE
                                       22
PAGE
<PAGE>





                                  9/18/96      12/27/96

                   TBA            100          94
                   AMEX           100          103
                   DJ DTC         100          115


            The total return for the Corporation's Common Stock (TBA),
       the American Stock Exchange Market Value Index (AMEX) and the Dow
       Jones Total Return Index for the Diversified Technology Industry
       Group (DJ DTC) assumes the reinvestment of dividends, although
       dividends have not been declared on the Corporation's Common
       Stock. The American Stock Exchange Market Value Index tracks the
       aggregate performance of equity securities of companies listed on
       the American Stock Exchange. The Corporation's Common Stock is
       traded on the American Stock Exchange under the ticker symbol
       "TBA." 

       RELATIONSHIP WITH AFFILIATES

            Thermo Electron has adopted a strategy of selling a minority
       interest in subsidiary companies to outside investors as an
       important tool in its future development. As part of this
       strategy, Thermo Electron and certain of its subsidiaries have
       created several privately and publicly held subsidiaries, and
       Thermo Instrument has created the Corporation as a publicly held,
       majority-owned subsidiary.   From time to time, Thermo Electron
       and its subsidiaries will create other majority-owned
       subsidiaries as part of its spinout strategy. (The Corporation
       and such other  majority-owned Thermo Electron subsidiaries are
       hereinafter referred to as the "Thermo Subsidiaries.") 
        
            Thermo Electron and each of the Thermo Subsidiaries
       recognize that the benefits and support that derive from their
       affiliation are essential elements of their individual
       performance. Accordingly, Thermo Electron and each of the Thermo
       Subsidiaries have adopted the Thermo Electron Corporate Charter
       (the "Charter") to define the relationships and delineate the
       nature of such cooperation among themselves. The purpose of the
       Charter is to ensure that (1) all of the companies and their
       stockholders are treated consistently and fairly, (2) the scope
       and nature of the cooperation among the companies, and each
       company's responsibilities, are adequately defined, (3) each
       company has access to the combined resources and financial,
       managerial and technological strengths of the others, and (4)
       Thermo Electron and the Thermo Subsidiaries, in the aggregate,
       are able to obtain the most favorable terms from outside parties.
        
            To achieve these ends, the Charter identifies the general
       principles to be followed by the companies, addresses the role
       and responsibilities of the management of each company, provides
       for the sharing of group resources by the companies and provides
       for centralized administrative, banking and credit services to be
       performed by Thermo Electron. The services provided by Thermo
                                       23
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<PAGE>





       Electron include collecting and managing cash generated by
       members, coordinating the access of Thermo Electron and the
       Thermo Subsidiaries (the "Thermo Group") to external financing
       sources, ensuring compliance with external financial covenants
       and internal financial policies, assisting in the formulation of
       long-range planning and providing other banking and credit
       services. Pursuant to the Charter, Thermo Electron may also
       provide guarantees of debt or other obligations of the Thermo
       Subsidiaries or may obtain external financing at the parent level
       for the benefit of the Thermo Subsidiaries. In certain instances,
       the Thermo Subsidiaries may provide credit support to, or on
       behalf of, the consolidated entity or may obtain financing
       directly from external financing sources. Under the Charter,
       Thermo Electron is responsible for determining that the Thermo
       Group remains in compliance with all covenants imposed by
       external financing sources, including covenants related to
       borrowings of Thermo Electron or other members of the Thermo
       Group, and for apportioning such constraints within the Thermo
       Group. In addition, Thermo Electron establishes certain internal
       policies and procedures applicable to members of the Thermo
       Group. The cost of the services provided by Thermo Electron to
       the Thermo Subsidiaries is covered under existing corporate
       services agreements between Thermo Electron and each of the
       Thermo Subsidiaries. 
        
            The Charter presently provides that it shall continue in
       effect so long as Thermo Electron and at least one Thermo
       Subsidiary participate. The Charter may be amended at any time by
       agreement of the participants. Any Thermo Subsidiary, including
       the Corporation, can withdraw from participation in the Charter
       upon 30 days' prior notice. In addition, Thermo Electron may
       terminate a subsidiary's participation in the Charter in the
       event the subsidiary ceases to be controlled by Thermo Electron
       or ceases to comply with the Charter or the policies and
       procedures applicable to the Thermo Group.  A withdrawal from the
       Charter automatically terminates the corporate services agreement
       and tax allocation agreement (if any) in effect between the
       withdrawing company and Thermo Electron. The withdrawal from
       participation does not terminate outstanding commitments to third
       parties made by the withdrawing company, or by Thermo Electron or
       other members of the Thermo Group, prior to the withdrawal.
       However, a withdrawing company is required to continue to comply
       with all policies and procedures applicable to the Thermo Group
       and to provide certain administrative functions mandated by
       Thermo Electron so long as the withdrawing company is controlled
       by or affiliated with Thermo Electron. 
        
            As provided in the Charter, the Corporation and Thermo
       Electron have entered into a Corporate Services Agreement (the
       "Services Agreement") under which Thermo Electron's corporate
       staff provides certain administrative services, including certain
       legal advice and services, risk management, employee benefit
       administration, tax advice and preparation of tax returns,
       centralized cash management and financial and other services to
                                       24
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<PAGE>





       the Corporation.  In 1995 and 1996, the Corporation was assessed
       an annual fee for these services equal to 1.2% and 1.0%,
       respectively, of the Corporation's revenues.  The fee is reviewed
       annually and may be changed by mutual agreement of the
       Corporation and Thermo Electron.  During fiscal 1996, Thermo
       Electron assessed the Corporation $716,000 in fees under the
       Services Agreement. Management believes that the charges under
       the Services Agreement are reasonable and that the terms of the
       Services Agreement are fair to the Corporation.  For items such
       as employee benefit plans, insurance coverage and other
       identifiable costs, Thermo Electron charges the Corporation based
       on charges attributable to the Corporation. The Services
       Agreement automatically renews for successive one-year terms,
       unless canceled by the Corporation upon 30 days' prior notice. In
       addition, the Services Agreement terminates automatically in the
       event the Corporation ceases to be a member of the Thermo Group
       or ceases to be a participant in the Charter. In the event of a
       termination of the Services Agreement, the Corporation will be
       required to pay a termination fee equal to the fee that was paid
       by the Corporation for services under the Services Agreement for
       the nine-month period prior to termination. Following
       termination, Thermo Electron may provide certain administrative
       services on an as-requested basis by the Corporation or as
       required in order to meet the Corporation's obligations under
       Thermo Electron's policies and procedures. Thermo Electron will
       charge the Corporation a fee equal to the market rate for
       comparable services if such services are provided to the
       Corporation following termination. 

            From time to time, the Corporation may transact business
       with other companies in the Thermo Group.  In fiscal 1996, these
       transactions included the following.

            The Corporation has entered into a lease and services
       arrangement with ThermoQuest under which ThermoQuest leases
       approximately 15,000 square feet of space, and provides certain
       accounting and administrative services, to the Corporation.  The
       Corporation pays ThermoQuest rent in the amount of 3 British
       Pounds Sterling per square foot and an allocated portion of
       ThermoQuest's costs for providing such services.  This
       arrangement may be terminated by the Corporation or by
       ThermoQuest upon 30 days' prior notice.  For the fiscal year
       ended December 28, 1996, the Corporation paid ThermoQuest
       approximately $105,000 under this arrangement.

            ThermoQuest acts as a distributor of certain of the
       Corporation's products, is the exclusive distributor of the
       Corporation's MALDI-TOF products of Japan and is the exclusive
       distributor of the Corporation's CE products in countries in
       which it maintains a direct sales force.  In consideration of
       such arrangements, the Corporation sells ThermoQuest such
       products at discounted rates negotiated by the parties.
       ThermoQuest is responsible for all installation and warranty
       labor obligations at its expense.  These arrangements may be
                                       25
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<PAGE>





       terminated on not less than three months' notice by either party
       given after December 31, 1996.  For the fiscal year ended
       December 28, 1996, the Corporation sold $2,002,000 of products to
       ThermoQuest under these arrangements.  In addition, the
       Corporation pays ThermoQuest a finder's fee for each qualified
       lead that generates order for the Corporation's MALDI-TOF
       products from customers in the United States and Europe.

            The Corporation has entered into an arrangement with
       ThermoQuest whereby ThermoQuest provides assembly labor for the
       Corporation's CE products on a contract basis.  Under this
       arrangement, ThermoQuest assembles instruments as required by the
       Corporation for a charge based on the sum of ThermoQuest's actual
       cost of materials and the allocable portion of its labor,
       overhead and other indirect expenses.  For the fiscal year ended
       December 28, 1996, the Corporation paid ThermoQuest approximately
       $471,000 under this arrangement.

            The Corporation's Eberline health Physics subsidiary
       purchases certain controllers and detectors from Thermo
       Instrument under an original equipment manufacturer agreement.   
       Under this agreement, the Corporation has the exclusive right to
       sell these instruments in the United States, Canada and Mexico.
        The Corporation is responsible for all warranty repair and
       maintenance obligations at its expense, but obtains replacement
       parts from Thermo Instrument without charge.  For the fiscal year
       ended December 28, 1996, the Corporation purchased $233,000 of
       instruments from Thermo Instrument under this agreement.

            The Corporation's Eberline health physics subsidiary also
       acts as a distributor of certain Thermo Instrument product lines
       and, with the exception of Thermo Instrument, is the exclusive
       distributor of such product lines to nuclear power plants and
       government agencies in the United States and Canada.  Thermo
       Instrument is responsible for warranty repairs at its own
       expense.  For the fiscal year ended December 28, 1996, the
       Corporation purchased $306,000 of instruments from Thermo
       Instrument under this arrangement.

            Various Thermo Instrument companies act as distributors of
       certain of the Corporation's LabSystems and Affinity Sensors
       products under informal arrangements that date from prior to the
       acquisition of the Fisons businesses in March 1996.  In
       consideration of such arrangements, the Corporation sells the
       respective Thermo Instrument companies certain products at
       discounted rates negotiated by the parties.  Under such
       arrangements, the respective Thermo Instrument companies are
       generally responsible for warranty repair and maintenance
       obligations.  For the fiscal year ended December 28, 1996,  
       LabSystems and Affinity Sensors sold an aggregate of $3,912,000
       of products to Thermo Instrument companies under these
       arrangements.

             In February 1996, the Corporation borrowed $30,000,000 from
                                       26
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<PAGE>





       Thermo Electron pursuant to a promissory note, due in February
       1997, and bearing interest at the 90-day Commercial Paper
       Composite Rate plus 25 basis points, set at the beginning of each
       quarter.  In July 1996, the Corporation borrowed $50,000,000 from
       Thermo Instrument pursuant to a subordinated convertible note,
       due in 2001, convertible into shares of Common Stock at $16.50
       per share, and bearing interest at an annual rate of 4.875%.  The
       Corporation repaid the amounts owed to Thermo Electron in July
       1996 with proceeds from the subordinated convertible note issued
       to Thermo Instrument.  As of December 28, 1996, the Corporation
       owed Thermo Instrument an aggregate of $50,000,000.

            As of December 28, 1996, $39,649,000 of the Corporation's
       cash equivalents were invested in a repurchase agreement with
       Thermo Electron.  Under this agreement, the Corporation in effect
       lends excess cash to Thermo Electron, which Thermo Electron
       collateralizes with investments principally consisting of
       corporate notes, United States government agency securities,
       money market funds, commercial paper and other marketable
       securities, in the amount of at least 103% of such obligation.
       The Corporation's funds subject to the repurchase agreement will
       be readily convertible into cash by the Corporation and have an
       original maturity of three months or less.  The repurchase
       agreement earns a rate based on the 90-day Commercial Paper
       Composite Rate plus 25 basis points, set at the beginning of each
       quarter.

       Stock Holding Assistance Plan

            In 1996, the Corporation adopted a stock holding policy
       which requires its executive officers to acquire and hold a
       minimum number of shares of Common Stock.  In order to assist the
       executive officers in complying with the policy, the Corporation
       also adopted a stock holding assistance plan, under which it may
       make interest-free loans to certain key employees, including its
       executive officers, to enable these individuals to purchase the
       Common Stock in the open market.  In 1996, Mr. Barry S. Howe, the
       Corporation's chief executive officer, received loans in the
       aggregate principal amount of $164,375.52 under this plan to
       purchase 12,000 shares.  Also in 1996, Dr. Richard W.K. Chapman,
       the Corporation's chairman of the board, received loans in the
       aggregate principal amount of $131,176.30 under this plan to
       purchase 10,000 shares.  All of these loans are repayable upon
       the earlier of demand or the fifth anniversary of the date of the
       loan, unless otherwise authorized by the Human Resources
       Committee of the Corporation's Board of Directors.

       -- PROPOSAL 2--

       PROPOSAL TO ADOPT AN EMPLOYEES' STOCK PURCHASE PLAN

            The Board of Directors has approved an employees' stock
       purchase plan (the "Stock Purchase Plan") and reserved 50,000
       shares of the Corporation's Common Stock for issuance thereunder,
                                       27
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<PAGE>





       subject to Stockholder approval.  The Board of Directors is
       recommending that the Stockholders approve the Stock Purchase
       Plan and the reservation of shares at this Meeting.  The purpose
       of the Stock Purchase Plan is to grant options to purchase shares
       of Common Stock of the Corporation to eligible employees of the
       Corporation.  The Board of Directors believes that the Stock
       Purchase Plan is an important incentive in attracting and
       retaining key personnel, and motivating individuals to contribute
       significantly to the Corporation's future growth and success, and
       in aligning the long-term interest of these individuals with
       those of the Corporation's Stockholders.  Accordingly, the Board
       of Directors acted to adopt the Stock Purchase Plan subject to
       Stockholder approval.

       Summary of the Stock Purchase Plan

            The full text of the Stock Purchase Plan is set forth in
       Attachment A to this proxy statement.  A description of the
       principal features of the Stock Purchase Plan follows, but it is
       qualified in its entirety by reference to the full text.

       Participation; Administration

            All full-time employees and part-time employees working at
       least 20 hours per week and who have been employed for at least
       six months by the Corporation are eligible to participate in the
       Stock Purchase Plan, unless they own more that 5% of the Common
       Stock of the Corporation.  For purposes of determining the term
       of employment, employees are credited with years of continuous
       employment with Thermo Electron or its other subsidiaries
       immediately prior to joining the Corporation.  Options to
       purchase shares of Common Stock of the Corporation may be granted
       from time to time at the discretion of the Board of Directors,
       which also determines the date upon which such options are
       exercisable.  The number of employees potentially eligible to
       participate in the Stock Purchase Plan is approximately 483
       persons.

       Contributions

            A participating employee may purchase stock only through
       payroll deductions. Eligible employees are also permitted to
       participate in the Thermo Electron employees' stock purchase
       plan, which has substantially the same terms as the Stock
       Purchase Plan.  The aggregate amount which may be contributed
       under the Thermo Electron employees' stock purchase plan and the
       Corporation's Stock Purchase Plan may not exceed 10% of the
       employee's gross salary or wages during the year.  The Board of
       Directors may fix the aggregate amount that may be contributed to
       the Stock Purchase Plan each year in its discretion within such
       limitation.  Employees are allowed to decrease,  but not
       increase, the percentage of wages contributed once during the
       Stock Purchase Plan year.  An employee may suspend his or her
       contributions, but then is not permitted to contribute again for
                                       28
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<PAGE>





       the remainder of the Stock Purchase Plan year.

       Terms of Options

            The exercise price is fixed on the grant date and is 95% of
       the fair market value for the Common Stock on such date.  On the
       exercise date, participants may elect to use their accumulated
       payroll deductions to purchase shares at the exercise price.
       Participants must agree not to resell the shares so purchased for
       a period of six months following the exercise date.  The options
       are nontransferable, and except in the case of death of the
       employee, may not be exercised if the employee is not still
       employed by the Corporation at the exercise date.  If an employee
       dies, his or her beneficiary may withdraw the accumulated payroll
       deduction or use such deductions to purchase shares on the
       exercise date.  A participant may elect to discontinue
       participation at any time prior to the exercise date and to have
       his or her accumulated payroll deduction refunded together with
       interest on such amount as fixed by the Board of Directors from
       time to time.

       Shares Subject to the Stock Purchase Plan

            The number of shares that are reserved for issuance under
       the Stock Purchase Plan will be 50,000 shares of the
       Corporation's Common Stock, subject to adjustment for stock
       splits and similar events.  The proceeds received by the
       Corporation from exercise under the Stock Purchase Plan will be
       used for the general purposes of the Corporation.  Shares issued
       under the Stock Purchase Plan may be authorized but unissued or
       shares reacquired by the Corporation and held in its treasury.

       Amendment and Termination

            The Stock Purchase Plan shall remain in full force and
       effect until suspended or discontinued by the Board of Directors.
       The Board of Directors may at any time or times amend or review
       the Stock Purchase Plan for any purpose which may at any time be
       permitted by law, or may at any time terminate the Stock Purchase
       Plan, provided that no amendment that is not approved by the
       Stockholders shall be effective if it would cause the Stock
       Purchase Plan to fail to satisfy the requirements of Rule 16b-3
       (or any successor rule) of the Securities Exchange Act of 1934,
       as amended.  No amendment of the Stock Purchase Plan may
       adversely affect the rights of any recipient of any option
       previously granted without such recipient's consent.

       Effective Date of the Stock Purchase Plan

            The Stock Purchase Plan will become effective as of  
       November 1, 1997, provided that it is approved by the
       Stockholders at this Meeting.

       Federal Income Tax Aspects
                                       29
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<PAGE>






            Federal income tax is not imposed upon an employee in the
       year an option is granted or the year the shares are purchased
       pursuant to the exercise of the option granted under the Stock
       Purchase Plan.  Federal income tax generally is imposed upon an
       employee when he or she sells or otherwise disposes of the shares
       acquired pursuant to the Stock Purchase Plan.  When an employee
       sells or disposes of the shares, if such sale or disposition
       occurs more than two years from the grant date and more than one
       year from the exercise date, then Federal income tax assessed at
       ordinary rates will be imposed upon the amount by which the fair
       market value of the shares on the date of grant or disposition,
       whichever is less, exceeds the amount paid for the shares.  In
       addition, the difference between the amount received by the
       employee at the time of sale and the employee's tax basis in the
       shares, which is equal to the amount paid on exercise of the
       option plus the amount recognized as ordinary income, will be
       recognized as a capital gain or loss.  The Corporation will not
       be allowed a deduction under these circumstances for Federal  
       income tax purposes.  If the employee sells or disposes of the
       shares sooner than two years from the grant date or one year from
       the exercise date, then the employee's entire gain (the
       difference between the fair market value at disposition and the
       amount paid for the shares) will be taxed as ordinary income, and
       the Corporation would be entitled to a deduction equal to that
       amount.

            The closing price per share on the American Stock Exchange
       of the Common Stock on April 25, 1997 was $12.25.

       Recommendation

            The Board of Directors believes that adoption of the Stock
       Purchase Plan and the reservation of shares thereunder is
       important for the Corporation to attract and retain key employees
       and to be able to continue to offer them the opportunity to
       participate in the ownership and growth of the Corporation
       through an employees stock purchase plan.  In addition, the Board
       of Directors believes the Stock Purchase Plan is in the best
       interest of the Corporation and its Stockholders and recommends
       that the Stockholders vote FOR the approval of the Stock Purchase
       Plan and the reservation of 50,000 shares of Common Stock
       thereunder.  Thermo Instrument, which owned of record
       approximately 66% of the outstanding voting stock of the
       Corporation on April 7, 1997, has indicated its intention to vote
       for the proposal.
         
            The affirmative vote of a majority of the Common Stock
       present and entitled to vote on this proposal is required to
       approve the adoption of the Stock Purchase Plan and the
       reservation of 50,000 shares of Common Stock thereunder.  The
       Board of Directors believes that the adoption of the Stock
       Purchase Plan is in the best interest of the Corporation and its
       Stockholders and recommends that you vote FOR approval of the
                                       30
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<PAGE>





       Stock Purchase Plan and the reservation of the shares.  If not
       otherwise specified, proxies will be voted FOR approval of this
       proposal.

       APPOINTMENT OF INDEPENDENT PUBLIC ACCOUNTANTS

            The Board of Directors has appointed Arthur Andersen LLP as
       independent public accountants for fiscal 1997. Arthur Andersen
       LLP has acted as independent public accountants for the
       Corporation since its inception in 1995. Representatives of that
       firm are expected to be present at the Meeting, will have the
       opportunity to make a statement if they desire to do so and will
       be available to respond to questions. The Board of Directors has
       established an Audit Committee, presently consisting of two
       outside directors, the purpose of which is to review the scope
       and results of the audit. 

       OTHER ACTION

            Management is not aware at this time of any other matters
       that will be presented for action at the Meeting. Should any such
       matters be presented, the proxies grant power to the proxy
       holders to vote shares represented by the proxies in the
       discretion of such proxy holders. 

       STOCKHOLDER PROPOSALS

            Proposals of Stockholders intended to be presented at the
       1998 Annual Meeting of the Stockholders of the Corporation must
       be received by the Corporation for inclusion in the proxy
       statement and form of proxy relating to that meeting no later
       than January 2, 1998. 

        SOLICITATION STATEMENT

            The cost of this solicitation of proxies will be borne by
       the Corporation. Solicitation will be made primarily by mail, but
       regular employees of the Corporation may solicit proxies
       personally, by telephone, facsimile transmission or telegram.
       Brokers, nominees, custodians and fiduciaries are requested to
       forward solicitation materials to obtain voting instructions from
       beneficial owners of stock registered in their names, and the
       Corporation will reimburse such parties for their reasonable
       charges and expenses in connection therewith. 
        
       Santa Fe, New Mexico
       April 29, 1997







                                       31
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<PAGE>





                                                        Attachment AA-34

                        THERMO BIOANALYSIS CORPORATION

                        EMPLOYEES' STOCK PURCHASE PLAN


       1.   Definitions.   As used in this Employees' Stock Purchase
            -----------
       Plan of Thermo BioAnalysis Corporation, the following terms shall
       have the meanings respectively assigned to them below:

            (a)  Base Compensation means annual or annualized base
            compensation, exclusive of  overtime, bonuses, contributions
            to employee benefit plans, or other fringe benefits, sales
            commissions, moving expense reimbursements or other special
            payments.

            (b)  Beneficiary  means the person designated as  beneficiary
            on the  Participant's Membership  Agreement or,  if no  such
            beneficiary is  named,  the person  to  whom the  Option  is
            transferred by will or under the applicable laws of  descent
            and distribution.

            (c)  Board means the board of directors of the Company.

            (d)  Code means the Internal Revenue Code of 1986, as
                 amended.

            (e)  Company means Thermo BioAnalysis Corporation, a
                 Delaware corporation.

            (f)  Company Stock means the common stock, $.01 par value,
                 of the Company.

            (g)  Eligible Employee means a person who is eligible under
            the provisions of Section 7 to receive an Option as of a
            particular Grant Date.

            (h)  Enrollment Agreement  means an agreement whereby a
            Participant authorizes the Company to withhold payroll
            deductions from his or her Gross Compensation.

            (i)  Exercise Date means a date not more than one year after
            a Grant Date, as determined by the Board, on which Options
            must be exercised by Eligible Employees.

            (j)  Grant Date means a date specified by the Board on which
            Options are to be granted to Eligible Employees.

            (k)  Gross Compensation means Base Compensation plus sales
            commissions, overtime pay and cash bonuses.

            (l)  Market Value means, as of a particular date, the last
            sale price of the Company Stock if such stock is reported on
                                       32
PAGE
<PAGE>





            the American Stock Exchange, or if not so reported, the
            average of bid and asked prices of the Company Stock last
            quoted by NASDAQ in the over-the-counter market on such
            date, as the case may be.

            (m)  Option means an option to purchase shares of Stock
                 granted under the Plan.

            (n)  Option Shares means shares of Stock purchasable under
            an Option, which shares may not be transferred by the
            Participant until at least six months after the Exercise
            Date.

            (o)  Participant  means an Eligible Employee to whom an
            Option is granted and who authorizes the Company to withhold
            payroll deductions by completing an Enrollment Agreement.

            (p)  Plan means this Employees' Stock Purchase Plan of the
            Company, as amended from time to time.

            (q)  Related Corporation means any corporation which is a
            parent corporation of the Company, as defined in Section
            425(e) of the Code, and any corporation controlled by that
            parent corporation or the Company.

            (r)  Rule 16b-3 means Rule 16b-3 and any successor rule
            promulgated under Section 16 of the Securities Exchange Act
            of 1934, as amended.

            (s)  Section 423 means Section 423 of the Code.

            2.   Purpose of the Plan.   The Plan is intended to
                 -------------------
       encourage ownership of Company Stock by employees of the Company
       and to provide additional incentive for the employees to promote
       the success of the business of the Company.  It is intended that
       the Plan shall be an "employee stock purchase plan" within the
       meaning of Section 423.

            3.   Term of the Plan.   The Plan shall become effective on
                 ----------------
       November 1, 1997.  No option shall be granted under the Plan
       after November 2, 2007.

            4.   Administration of the Plan.  The Plan shall be
                 --------------------------
       administered by the Board, which annually shall determine whether
       to grant Options under the Plan, shall specify which dates shall
       be Grant Dates and Exercise Dates, and shall fix the respective
       maximum percentages of each Participant's Gross Compensation
       which may be withheld for the purpose of purchasing shares of
       Company Stock; provided, that, the maximum aggregate percentage
                      --------
       of each Participant's Gross Compensation which may be withheld
       for the purpose of purchasing shares of stock under this Plan and
       all other employees stock purchase plans (as defined in Section
       423(b) of the Code) administered by a Related Corporation and in
       which Eligible Employees may participate shall not exceed ten
                                       33
PAGE
<PAGE>





       percent of the Participant's Gross Compensation.  The Board shall
       have authority to interpret the Plan, to prescribe, amend and
       rescind rules and regulations relating to the Plan, to determine
       the terms of Options granted under the Plan, and to make all
       other determinations necessary or advisable for the
       administration of the Plan.

            The Board may appoint a committee, consisting of
       "non-employee directors"  as defined in Rule 16b-3, to administer
       the Plan and may, in its sole and absolute discretion, delegate
       any or all of the functions specified herein regarding
       administration of the Plan to such committee.

            5.   Termination and Amendment of Plan.  The Board may
                 ---------------------------------
       terminate or amend the Plan at any time; provided, however, that
                                                ------------------
       no amendment, unless approved by the holders of a majority of the
       issued and outstanding shares of Company Stock shall be effective
       if it would cause the Plan to fail to satisfy the requirements of
       Rule 16b-3.  No termination of or amendment to the Plan may
       adversely affect the rights of a Participant with respect to any
       Option held by the Participant as of the date of such termination
       or amendment.

            6.   Shares of Stock Subject to the  Plan .  No more than an
                 ------------------------------------
       aggregate of  50,000 shares  of Company  Stock may  be issued  or
       delivered pursuant to the exercise  of Options granted under  the
       Plan, subject to adjustments made in accordance with Section 9.8.
       Option Shares may  be either  shares of Company  Stock which  are
       authorized but unissued or  shares of Company  Stock held by  the
       Company in its treasury.  If an Option expires or terminates  for
       any reason without having been exercised in full, the unpurchased
       Option Shares shall  become available for  other Options  granted
       under the Plan.   The Company  shall, at all  times during  which
       Options are  outstanding, reserve  and keep  available shares  of
       Company Stock sufficient to satisfy  such Options, and shall  pay
       all fees  and  expenses incurred  by  the Company  in  connection
       therewith.  In the event of any capital change in the outstanding
       Company Stock  as  contemplated by  Section  9.8, the  number  of
       shares of   Company  Stock  reserved and  kept available  by  the
       Company shall be appropriately adjusted.

            7.   Persons Eligible to Receive Options.  Each employee of
                 -----------------------------------
       the Company shall be granted an Option on each Grant Date on
       which such employee meets all of the following requirements:

            (a)  The employee  has  completed  at least  six  months  of
            continuous  employment  for  the  Company    or  a   Related
            Corporation.  Employment shall include any leave of  absence
            for military  service, illness  or other  bona fide  purpose
            which does not exceed  the longer of 90  days or the  period
            during which the absent  employee's reemployment rights  are
            guaranteed by statute or contract.

            (b)  The employee is customarily employed by the Company for
                                       34
PAGE
<PAGE>





            more than 20 hours  per week and for  more than five  months
            per calendar year.

            (c)  The employee will not, after  grant of the Option,  own
            stock possessing five percent or more of the total  combined
            voting power or value of all classes of stock of the Company
            or of  any  Related  Corporation.    For  purposes  of  this
            paragraph (c), the rules of Section 425(d) of the Code shall
            apply in determining  the stock ownership  of the  employee,
            and stock which the employee may purchase under  outstanding
            options shall be treated as stock owned by the employee.

            (d)  Upon grant  of the  Option,  the employee's  rights  to
            purchase stock under all  employee stock purchase plans  (as
            defined in Section 423(b)  of the Code)  of the Company  and
            its Related Corporations  will not  accrue at  a rate  which
            exceeds  $25,000  of   fair  market  value   of  the   Stock
            (determined as of the Grant  Date for such Option) for  each
            calendar year in  which such  Option is  outstanding at  any
            time.   The accrual  of rights  to purchase  Stock shall  be
            determined in  accordance with  Section  423(b) (8)  of  the
            Code.

            8.   Dates for Granting Options.  Options shall be granted
                 --------------------------
       on each date designated by the Board as a Grant Date.

            9.   Terms and Conditions of Options.
                 -------------------------------

            9.1. General.  All Options granted on a particular Grant
                 -------
       Date shall comply with the terms and conditions set forth in
       Sections 9.3 through 9.12, and each Option shall be identical
       except as to the number of shares of Company Stock purchasable
       under the Option, which shall be determined in accordance with
       Section 9.2.

            9.2. Number of Shares.  The maximum number of shares of
                 ----------------
       Company Stock which a Participant shall be permitted to purchase
       shall be equal to the amount of the Participant's Gross
       Compensation permitted to be withheld for purchasing Company
       Stock during the period running from the Grant Date to the
       Exercise Date, divided by the purchase price determined in
       accordance with Section 9.3.  The number of shares which a
       Participant is permitted to purchase may be further limited by
       the amount of payroll deductions actually withheld as of the
       Exercise Date.

            9.3. Purchase Price   .     The  purchase price of  Option Shares
                 --------------
       shall be 95 percent  of the Market Value  of Company Stock as  of
       the Grant Date.   If  the Grant Date  shall fall  on a  Saturday,
       Sunday  or  other  legal  holiday,  the  Market  Value  shall  be
       determined as of the trading day immediately preceding the  Grant
       Date.

            9.4. Restrictions on Transfer.  Options may not be
                 ------------------------
                                       35
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<PAGE>





       transferred otherwise than by will or under the laws of descent
       and distribution, or pursuant to a qualified domestic relations
       order.  An Option may not be exercised by anyone other than the
       Participant during the lifetime of the Participant.  Option
       Shares may not be sold or otherwise transferred by the
       Participant until at least six months after the Exercise Date.
       The Company shall have the right to place a legend on all stock
       certificates representing Option Shares setting forth the
       restriction on transferability of such shares.

            9.5. Expiration.  Each Option shall expire at the close of
                 ----------
       business on the Exercise Date or on such earlier date as may
       result from the operation of Section 9.6.

            9.6. Termination of Employment of Participant. If a
                 ----------------------------------------
       Participant ceases for any reason, voluntary or involuntary
       (other than death or retirement), to be continuously employed by
       the Company or a Related Corporation, his or her Option shall
       immediately expire, and the Participant's accumulated payroll
       deductions shall be returned by the Company with interest
       pursuant to Section 9.12.  For purposes of this Section 9.6, a
       Participant shall be deemed to be employed throughout any leave
       of absence for military service, illness or other bona fide
       purpose which does not exceed the longer of ninety days or the
       period during which the Participant's reemployment rights are
       guaranteed by statute or by contract.  If the Participant does
       not return to active employment prior to the termination of such
       period, his or her employment shall be deemed to have ended on
       the 91st day of such leave of absence.

            9.7  Retirement or Death of Participant.  If a Participant
                 ----------------------------------
       retires or dies, the Participant or, in the case of death, his or
       her Beneficiary, shall be entitled to withdraw the Participant's
       accumulated payroll deductions with interest pursuant to Section
       9.12, or to purchase shares on the Exercise Date to the extent
       that the Participant would have been so entitled had he or she
       continued to be employed by the Company.  The number of shares
       purchasable shall be limited by the amount of the participant's
       accumulated payroll deductions as of the date of his or her
       retirement or death.  Accumulated payroll deductions shall be
       applied by the Company toward the purchase of shares unless the
       Participant or Beneficiary withdraws such funds prior to the
       Exercise Date.

            9.8  Capital Changes Affecting the Stock.  In the event
                 -----------------------------------
       that, between the Grant Date and the Exercise Date of an Option,
       a stock dividend is paid or becomes payable in respect of Company
       Stock or there occurs a split-up or contraction in the number of
       shares of  Company Stock, the number of shares for which the
       Option may thereafter be exercised and the price to be paid for
       each such share shall be proportionately adjusted.  In the event
       that, after the Grant Date, there occurs a reclassification or
       change of outstanding shares of Company Stock or a consolidation
       or merger of the Company with or into another corporation or a
                                       36
PAGE
<PAGE>





       sale or conveyance, substantially as a whole, of the property of
       the Company, the Participant shall be entitled on the Exercise
       Date to receive shares of stock or other securities equivalent in
       kind and value to the shares of stock he or she would have held
       if he or she had exercised the Option in full immediately prior
       to such reclassification, change, consolidation, merger, sale or
       conveyance and had continued to hold such shares (together with
       all other shares and securities thereafter issued in respect
       thereof) until the Exercise Date.  In the event that there is to
       occur a recapitalization involving an increase in the par value
       of Company Stock which would result in a par value exceeding the
       exercise price under an outstanding Option, the Company shall
       notify the Participant of such proposed recapitalization
       immediately upon its being recommended by the Board to the
       Company's shareholders, after which the Participant shall have
       the right to exercise his or her Option prior to such
       recapitalization; if the Participant fails to exercise the Option
       prior to recapitalization, the exercise price under the Option
       shall be appropriately adjusted.  In the event that, after the
       Grant Date, there occurs a dissolution or liquidation of the
       Company, except pursuant to a transaction to which Section 425(a)
       of the Code applies, each Option to purchase Company Stock shall
       terminate, but the Participant holding such Option shall have the
       right to exercise his or her Option prior to such dissolution or
       liquidation.

            9.9. Payroll Deductions.  Any Eligible Employee, who wishes
                 ------------------
       to authorize payroll deductions for the purchase of Option Shares
       under the Plan, must complete and return to the human resources
       department of the Company prior to the Grant Date an Enrollment
       Agreement indicating the total percentage (which shall be a full
       integer between one and the maximum determined by the Board in
       accordance with Section 4 hereof) of his or her Gross
       Compensation which is to be withheld each pay period.  Prior to
       the Exercise Date, the Participant shall be permitted only once
       to (a) withdraw accumulated payroll deductions, (b) discontinue
       payroll deductions, or (c) decrease, but not increase, the
       percentages of Gross Compensation withheld.  The Participant may
       not recommence payroll deductions at any time prior to the
       Exercise Date.

            9.10.     Exercise of Options.  On the Exercise Date the
                      -------------------
       Participant shall be deemed to have exercised his or her Option
       to purchase the maximum number of Option Shares purchasable by
       his or her accumulated payroll deductions, provided that:

            (a)  The number of Option Shares of Company Stock
            purchasable shall not exceed the number of shares the
            Participant is entitled to purchase pursuant to Section 9.2.

            (b)  If the total number of Option Shares of Company Stock
            which all Participants elect to purchase, together with any
            Option Shares of Company Stock already purchased under the
            Plan, exceeds the total number of shares of Company Stock
                                       37
PAGE
<PAGE>





            which may be purchased under the Plan pursuant to Section 6,
            the number of shares of Company Stock which each Participant
            is permitted to purchase shall be decreased pro rata based
                                                        --------
            on the Participant's accumulated payroll deductions with
            respect to Company Stock in relation to all accumulated
            payroll deductions currently being withheld under the Plan
            with respect to Company Stock.

            (c)  If the number of Option Shares purchasable includes a
            fraction, such number shall be adjusted to the next smaller
            whole number and the purchase price shall be adjusted
            accordingly.

            (d)  Notwithstanding the foregoing, a Participant may notify
            the Company's human resources department at least 30 days
            prior to an Exercise Date, by completing an
            Enrollment/Change Agreement, that he or she elects not to
            exercise his or her Option and desires to withdraw his or
            her accumulated payroll deductions withheld under the Plan,
            as provided in Section 9.9.

            9.11.     Delivery of Stock.  Within a reasonable time after
                      -----------------
       the Exercise Date, the Company shall deliver or cause to be
       delivered to the Participant a certificate or certificates for
       the number of shares purchased by the Participant.  If any law or
       applicable regulation of the Securities and Exchange Commission
       or other body having jurisdiction in the premises shall require
       that the Company or the Participant take any action in connection
       with the shares being purchased under the Option, delivery of the
       certificate or certificates for such shares shall be postponed
       until the necessary action shall have been completed, which
       action shall be taken by the Company at its own expense, without
       unreasonable delay.  The Participant shall have no rights as a
       shareholder in respect of shares for which he or she has not
       received a certificate.

            9.12.     Return of Accumulated Payroll Deductions.  In the
                      ----------------------------------------
       event that the Participant or the Beneficiary is entitled to the
       return of accumulated payroll deductions, whether by reason of
       voluntary withdrawal, termination of employment, retirement,
       death, or in the event that accumulated payroll deductions exceed
       the price of Option Shares purchased, such amount, together with
       interest thereon at the rate fixed by the Board of Directors
       (which rate for a particular plan year running from Grant Date to
       Exercise Date shall be fixed annually by the Board of Directors
       prior to the commencement of such period), shall be returned
       within a reasonable time by the Company to the Participant or the
       Beneficiary, as the case may be; provided, however,  that
                                        --------  -------
       interest shall not be paid on any amount returned which is less
       than the purchase price of one Option Share of Company Stock for
       which such payroll deductions were withheld.



                                       38
PAGE
<PAGE>





                                 FORM OF PROXY

                        THERMO BIOANALYSIS CORPORATION

       PROXY FOR ANNUAL MEETING OF STOCKHOLDERS TO BE HELD JUNE 2, 1997

         THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS.

            The undersigned hereby appoints John N. Hatsopoulos, Barry
       S. Howe and Jonathan W. Painter, or any one of them in the
       absence of the others, as attorneys and proxies of the
       undersigned, with full power of substitution, for and in the name
       of the undersigned, to represent the undersigned at the Annual
       Meeting of the Stockholders of Thermo BioAnalysis Corporation, a
       Delaware corporation (the "Company"), to be held on Monday, June
       2, 1997, at 10:00 a.m. at The Hyatt Regency Hotel, Hilton Head,
       South Carolina, and at any adjournment or postponement thereof,
       and to vote all shares of common stock of the Company standing in
       the name of the undersigned on April 7, 1997, with all of the
       powers the undersigned would possess if personally present at
       such meeting:


           (IMPORTANT - TO BE SIGNED AND DATED ON THE REVERSE SIDE.)


                 Please mark your
       [   x   ]      votes as in this 
                 example.

       1.  ELECTION OF DIRECTORS OF THE COMPANY (see reverse).

                 FOR       [    ]         WITHHELD  [    ]

       ______________________________________
       FOR all nominees listed at right, except authority to vote
       withheld for the following nominees (if any)

       Nominees:  Richard W.K. Chapman, Elias P. Gyftopoulos, Denis A.
       Helm, Barry S. Howe, Earl R. Lewis, Jonathan W. Painter, Arvin H.
       Smith and Arnold E. Weinberg.

                                           FOR     AGAINST     ABSTAIN
       2.   Approve management proposal   [    ]   [    ]      [   ]
            to adopt the Corporation's
            employees' stock purchase plan 
            and reserve 50,000 shares of the
            common stock for issuance thereunder.

       3.   In their discretion on such other matters as may properly
       come before the Meeting.

       The shares represented by this Proxy will be voted "FOR" the
       proposals set forth above if no instruction to the contrary is
                                       39
PAGE
<PAGE>





       indicated or if no instruction is given.

       Copies of the Notice of  Meeting and of the Proxy Statement have
       been received by the undersigned.

       SIGNATURE(S)_______________________________________   
       DATE_________________
       Note:  This proxy should be dated, signed by the shareholder(s)
            exactly as his or her name appears hereon, and returned
            promptly in the enclosed envelope.  Persons signing in a
            fiduciary capacity should so indicate.  If shares are held
            by joint tenants or as community property, both should sign.


       AA971210013










































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