THERMOTREX CORP
10-K, 1997-12-08
X-RAY APPARATUS & TUBES & RELATED IRRADIATION APPARATUS
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                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549
                  _____________________________________________

                                    FORM 10-K
    (mark one)
    [ X ] Annual Report Pursuant to Section 13 or 15(d) of the Securities
          Exchange Act of 1934 for the fiscal year ended September 27, 1997

    [   ] Transition Report Pursuant to Section 13 or 15(d) of the Securities
          Exchange Act of 1934

                         Commission file number 1-10791

                             THERMOTREX CORPORATION
             (Exact name of Registrant as specified in its charter)
    Delaware                                                       52-1711436
    (State or other jurisdiction of                          (I.R.S. Employer
    incorporation or organization)                        Identification No.)

    10455 Pacific Center Court
    San Diego, California                                          92121-4339
    (Address of principal executive offices)                       (Zip Code)
       Registrant's telephone number, including area code: (781) 622-1000

           Securities registered pursuant to Section 12(b) of the Act:

            Title of each class          Name of exchange on which registered
      -------------------------------    ------------------------------------
      Common Stock, $.01 par value             American Stock Exchange
      3 1/4% Subordinated Convertible
        Debentures due 2007                    American Stock Exchange

           Securities registered pursuant to Section 12(g) of the Act:
                                      None

    Indicate by check mark whether the Registrant (1) has filed all reports
    required to be filed by Section 13 or 15(d) of the Securities Exchange
    Act of 1934 during the preceding 12 months, and (2) has been subject to
    the filing requirements for at least the past 90 days. Yes [ X ] No [  ]

    Indicate by check mark if disclosure of delinquent filers pursuant to
    Item 405 of Regulation S-K is not contained herein, and will not be
    contained, to the best of the Registrant's knowledge, in definitive proxy
    or information statements incorporated by reference into Part III of this
    Form 10-K or any amendment to this Form 10-K. [  ]

    The aggregate market value of the voting stock held by nonaffiliates of
    the Registrant as of October 31, 1997, was approximately $206,309,000.

    As of October 31, 1997, the Registrant had 19,249,204 shares of Common
    Stock outstanding.

                       DOCUMENTS INCORPORATED BY REFERENCE
    Portions of the Registrant's Annual Report to Shareholders for the fiscal
    year ended September 27, 1997, are incorporated by reference into Parts I
    and II.

    Portions of the Registrant's definitive Proxy Statement for the Annual
    Meeting of Shareholders to be held on March 5, 1998, are incorporated by
    reference into Part III.
PAGE
<PAGE>
                                     PART I

    Item 1. Business

    (a) General Development of Business

        ThermoTrex Corporation (the Company or the Registrant) has three
    majority-owned subsidiaries, 79%-owned Trex Medical Corporation (Trex
    Medical), 67%-owned ThermoLase Corporation (ThermoLase), and 78%-owned
    Trex Communications Corporation (Trex Communications). Through its
    publicly traded Trex Medical subsidiary, the Company designs,
    manufactures, and markets mammography and minimally invasive digital
    breast-biopsy systems used for the detection of breast cancer, as well as
    general-purpose and specialized X-ray equipment. Through its publicly
    traded ThermoLase subsidiary, the Company has developed a laser-based
    system for the removal of unwanted hair (the SoftLight(SM) system), which
    is being marketed in the U.S. through ThermoLase's Spa Thira locations
    and through licensing agreements with physicians, and in foreign
    countries through joint ventures and other licensing arrangements.
    ThermoLase also manufactures and markets skin-care and other
    personal-care products. In addition, the Company performs advanced
    technology research in the areas of communications, avionics, X-ray
    detection, signal processing, and lasers. The Company's laser
    communications (lasercom) research is performed by its privately held
    Trex Communications Corporation (Trex Communications) subsidiary, which
    also designs and markets interactive information and voice-response
    systems, as well as call-automation systems.

        In October 1997, Trex Medical's XRE Corporation (XRE) subsidiary
    acquired substantially all of the assets, subject to certain liabilities,
    of Digitec Corporation, a manufacturer of physiological-monitoring
    equipment and digital-image archiving and networking systems used in
    cardiac catheterization procedures. 

        Trex Medical is currently developing a full-field digital mammography
    system that is intended to be capable of higher image quality. The system
    is designed to enhance the X-ray image through software and to allow
    near-real-time analysis. Trex Medical expects that it will be possible to
    electronically transmit these images to allow off-site analysis by
    another radiologist, and believes this technology may also provide better
    images of dense breast tissue, which is often found in younger women.
    Trex Medical has collected clinical data and, in December 1997, submitted
    a 510(k) application with such data to the U.S. Food and Drug
    Administration (FDA), which must grant market clearance before this
    system can be sold commercially.

        Trex Medical has designed its new, high-end conventional mammography
    systems so that radiologists can upgrade to digital technology when it
    becomes available. Trex Medical believes that the digital-imaging
    technology being developed for this system may be adaptable to its
    general-purpose and specialized X-ray systems, and will seek to develop
    applications in these markets. Trex Medical is also working on a more
    advanced version of its digital technology, which incorporates a
    flat-panel, direct-digital detector and could provide still more
    information for earlier diagnoses.

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        ThermoLase opened its first Spa Thira in early fiscal 1996*, and had
    a total of four opened by the end of fiscal 1996. In fiscal 1997,
    ThermoLase opened nine more domestic spas, and by October 1997 had a
    total of 14 domestic Spa Thira locations. In June 1996, ThermoLase
    initiated a program to license its SoftLight technology to physicians. As
    of November 1997, approximately 150 lasers were placed in practices in
    33 states and certain international markets. In January 1996, ThermoLase
    established its first international joint venture and, during fiscal
    1997, added two additional joint ventures and six additional licensing
    arrangements. ThermoLase's international arrangements resulted in the
    opening of spas in Paris in May 1997 and Lugano, Switzerland, in October
    1997, and additional spas are expected to be constructed during fiscal
    1998, pending regulatory approvals.

        ThermoLase continues to pursue an extensive research and development
    program to improve the efficacy and duration of its hair-removal
    treatment. ThermoLase has developed a modification to its procedure,
    called SoftLight 2.0, and began introducing this procedure in its spas
    and to its licensees in September 1997. Although the clinical laboratory
    results are encouraging, the results are preliminary and there can be no
    assurance that SoftLight 2.0 will be successful in improving the
    hair-removal process. ThermoLase believes that improvements in the
    hair-removal procedure are critical elements in its ability to improve
    the profitability of its business.

        In March 1997, ThermoLase filed with the FDA a 510(k) application
    seeking clearance to market cosmetic skin resurfacing services utilizing
    its SoftLight Rejuvenation(TM) Laser, including wrinkle- and skin-texture
    treatment. This technology, which uses the same laser as ThermoLase's
    hair-removal system, is designed to improve the skin's appearance and
    texture.

        During fiscal 1997, the Company created its Trex Communications
    subsidiary, and in September 1997 completed a private placement of
    1,133,000 shares of Trex Communications common stock for net proceeds of
    $10.6 million. Trex Communications is developing a laser communications
    (lasercom) technology, which is designed to move very large amounts of
    data quickly via lasers without the need for wires or licensing from the
    Federal Communications Commission. In July 1997, Trex Communications
    acquired Computer Communications Specialists, Inc. (CCS), which designs
    and markets interactive information and voice-response systems, as well
    as call-automation systems. 

        The Company continues to perform substantial amounts of government-
    sponsored research and development and apply its core technologies to the
    development of new commercial products, such as its passive microwave
    camera. The passive microwave camera could be used to enhance safety in


    * In September 1995, the Company changed its fiscal year end from the
      Saturday nearest December 31 to the Saturday nearest September 30.
      References to "fiscal 1997," "fiscal 1996," and "fiscal 1995" herein
      are for the years ended September 27, 1997, and September 28, 1996,
      and the nine months ended September 30, 1995, respectively.

                                        3PAGE
<PAGE>
    aircraft navigation during low-visibility conditions and in certain
    security applications. 

        At September 27, 1997, Thermo Electron Corporation (Thermo Electron)
    owned 10,149,556 shares of the common stock of the Company, representing
    53% of such stock then outstanding. Thermo Electron is a world leader in
    environmental monitoring and analysis instruments, biomedical products
    such as heart-assist devices, papermaking and recycling equipment,
    biomass electric power generation, and other specialized products and
    technologies. Thermo Electron also provides a range of services related
    to environmental quality.

        Thermo Electron intends for the foreseeable future to maintain at
    least 50% ownership of the Company. This will require the purchase by
    Thermo Electron of additional shares of Company common stock from time to
    time as the number of outstanding shares issued by the Company increases.
    These and any other purchases may be made either in the open market or
    directly from the Company. During fiscal 1997, Thermo Electron purchased
    317,200 shares of the Company's common stock in the open market for a
    total price of $7.2 million. See Notes 5 and 15 to Consolidated Financial
    Statements in the Registrant's Fiscal 1997 Annual Report to Shareholders
    for a description of outstanding stock options and subordinated
    convertible debentures.

    Forward-looking Statements

         Forward-looking statements, within the meaning of Section 21E of
    the Securities Exchange Act of 1934, are made throughout this Annual
    Report on Form 10-K. For this purpose, any statements contained herein
    that are not statements of historical fact may be deemed to be
    forward-looking statements. Without limiting the foregoing, the words
    "believes," "anticipates," "plans," "expects," "seeks," "estimates," and
    similar expressions are intended to identify forward-looking statements.
    There are a number of important factors that could cause the results of
    the Company to differ materially from those indicated by such
    forward-looking statements, including those detailed under the heading
    "Forward-looking Statements" in the Registrant's Fiscal 1997 Annual
    Report to Shareholders, which statements are incorporated herein by
    reference.

    (b) Financial Information About Industry Segments

         The Company's business is divided into three industry segments:
    Medical Products manufactured by the Company's Trex Medical subsidiary,
    Personal-care Products and Services provided by the Company's ThermoLase
    subsidiary, and Advanced Technology Research, including research
    conducted and products distributed by its Trex Communications subsidiary.
    The principal products produced and services rendered by the Company in
    these three segments are described in detail below. (See "Principal
    Products and Services.")

                                        4PAGE
<PAGE>
        Financial information concerning the Company's industry segments is
    provided in Note 13 to Consolidated Financial Statements in the
    Registrant's Fiscal 1997 Annual Report to Shareholders, which information
    is incorporated herein by reference.

    (c)  Description of Business

         (i) Principal Products and Services

    Medical Products

         Trex Medical consists of four operating units: Lorad, Bennett X-Ray
    Corporation (Bennett), XRE, and Continental X-Ray Corporation
    (Continental). Lorad manufactures and markets mammography and minimally
    invasive digital breast-biopsy systems. Bennett's primary product line
    consists of general-purpose X-ray equipment. XRE manufactures and markets
    X-ray imaging systems used by interventional cardiologists in the
    diagnosis and treatment of blockages in coronary arteries and other
    vessels. Continental manufactures and markets a broad line of high-end
    general-purpose X-ray systems, as well as specialized units.

         Trex Medical sells its products through a worldwide network of more
    than 100 independent dealers and, to a lesser extent, on a direct basis.
    In addition to manufacturing and marketing its own systems, the Company
    manufactures systems and system components as an OEM for other medical
    equipment companies such as United States Surgical Corporation (U.S.
    Surgical) and the GE Medical Systems division of General Electric Company
    (GE).

    Mammography Systems

         Trex Medical designs, manufactures, and markets mammography systems
    that are differentiated on the basis of price and performance. Its
    high-end models are the Lorad M-IV and the Bennett Contour Plus, both of
    which can be upgraded to accept the full-field digital-imaging technology
    being developed by Trex Medical, when available. Trex Medical also offers
    two lower-priced models and two mobile mammography systems.

         Trex Medical has collected clinical data using its prototype
    full-field digital mammography system and, in December 1997, submitted a
    510(k) application with such data to the FDA, which must grant market
    clearance before the system can be marketed commercially.

        Trex Medical believes that demand in the market for mammography
    systems is driven primarily by technological innovation that results in
    better image quality. Although growth of the installed base has slowed,
    demand for new systems continues as older models are replaced with those
    offering technological innovations. In addition, Trex Medical believes
    that the market outside the United States will grow as more countries
    adopt mammography quality standards similar to those adopted in the
    United States.

                                        5PAGE
<PAGE>
    Minimally Invasive Digital Breast-biopsy Systems

        The Company offers a variety of minimally invasive digital
    breast-biopsy systems, manufactured by Lorad and Bennett, that provide an
    alternative to surgical biopsy. These digital breast-biopsy systems were
    introduced to address the disadvantages of open surgical biopsy and can
    be performed on an outpatient basis under local anesthetic. The typical
    cost of a minimally invasive breast-biopsy procedure is approximately
    one-third that of an open surgical biopsy.

        The Company offers a dedicated prone table, the StereoGuide(R), and
    upright, add-on systems that can be attached to most of its mammography
    systems. Trex Medical's StereoGuide system is the subject of a lawsuit
    alleging infringement of a Fischer Imaging Corporation (Fischer) patent.
    See "Item 3 - Legal Proceedings."

        Trex Medical believes that the minimally invasive digital
    breast-biopsy system market will grow as the procedure becomes more
    widely accepted by the medical community and as pressures to contain
    healthcare costs increase. 

    General-purpose Radiography

        Trex Medical addresses the general-purpose X-ray market through its
    Bennett and Continental subsidiaries. Bennett primarily designs,
    manufactures, and markets low-cost, reliable systems to medical
    outpatient facilities, such as doctors' offices and surgi-care centers.
    Continental (and, to a lesser extent, Bennett) markets the more
    sophisticated and expensive X-ray systems typically used in hospitals and
    clinics. In addition, Bennett manufactures and markets imaging systems
    designed specifically for chiropractors and veterinarians.

        The U.S. market for general-purpose X-ray systems is stable, and
    consists primarily of replacement sales as customers upgrade older
    equipment. Trex Medical believes that the international market is
    substantially larger than the U.S. market and that the installed base of
    systems is still growing, particularly in developing countries. Trex
    Medical has recently expanded its international sales efforts. 

        Trex Medical believes digital imaging will have significant
    application in the general-purpose and specialized X-ray markets and that
    the technology it develops for its full-field digital imaging system may
    be adaptable to these applications. In general-purpose X-ray
    applications, Trex Medical believes digital imaging will produce better
    quality images and reduce operating costs by eliminating the need for
    film, processing equipment, and chemicals. In addition, digital imaging
    will permit the electronic storage of images on magnetic or optical
    media, as well as the transmission of images to multiple locations.
    Furthermore, Trex Medical believes digital imaging could make the image
    intensifiers, which are large and expensive components in certain imaging
    systems, obsolete.

                                        6PAGE
<PAGE>
    Cardiac Catheterization, Angiography, and Electrophysiology

        Through its XRE subsidiary, Trex Medical designs, manufactures, and
    markets cardiac catheterization laboratories (also called cath labs) and
    positioners for cardiovascular imaging systems. XRE's imaging equipment
    is used in cath labs where angiography (the examination of blood vessels
    using X-rays following the injection of a radiopaque contrast medium) is
    performed by an interventional cardiologist. XRE systems are designed to
    provide real-time images of peripheral blood vessels and of the heart and
    coronary arteries for physicians performing diagnostic and interventional
    procedures such as balloon angioplasty.

        Trex Medical believes vascular and cardiovascular surgeons will
    increasingly use balloon angioplasty and other less-invasive techniques
    to treat vascular diseases. These procedures are performed under the
    guidance of X-ray imaging such as that provided by Trex Medical's
    equipment.

        To complement its cath labs, XRE has developed a line of digital
    image-processing systems, workstations, and archive alternatives. XRE's
    Digitec division, acquired in October 1997, manufactures physiological-
    monitoring equipment and digital-image archiving and networking systems
    used in cardiac catheterization procedures. In addition, Continental
    designs, manufactures, and sells electrophysiology systems that are used
    in the diagnosis and treatment of cardiac arrhythmia, which is
    characterized by the sudden, erratic beating of the heart and can result
    in cardiac arrest.

    Radiographic/Fluoroscopic Systems

        Through its Continental subsidiary, Trex Medical designs,
    manufactures, and markets radiographic/fluoroscopic (R/F) products. An
    R/F system is able to record dynamic events by capturing a series of
    images in a short period of time. For example, R/F systems are used for
    various gastrointestinal procedures to image in real-time the progress of
    a radiopaque ingested solution (typically barium) through the digestive
    tract.

    Personal-care Products and Services

    Laser-based Hair Removal

        ThermoLase's patented SoftLight system uses a low-energy, dermatology
    laser in combination with a specially developed lotion that directs and
    absorbs the laser's energy to disable hair follicles. Unlike
    electrolysis, the SoftLight system can disable numerous hair follicles at
    one time. As a result, ThermoLase believes that it will be able to
    address a larger market than electrolysis by offering hair removal from
    large areas, such as the legs. The lasers, which are similar to those
    used for tattoo and birthmark removal, are manufactured for ThermoLase by
    Trex Medical. The lotion is manufactured by ThermoLase's CBI Laboratories
    subsidiary.

                                        7PAGE
<PAGE>
        In a typical treatment, the area from which hair is to be removed is
    given a gentle cleansing. The lotion is then applied to the skin, and the
    area is scanned several times with the laser beam. The laser energy is
    absorbed by the lotion that has penetrated the hair duct, causing the
    temperature of the lotion to increase to a level that disables the hair
    follicles. The laser treatment most effectively disables hair follicles
    in the active growing (anagen) stage of development, and at any one time,
    a certain percentage of hair follicles are in the resting (telogen)
    stage. Therefore, it is necessary for clients to return for one or more
    additional treatments to ensure that each follicle is treated while in
    the active stage of hair growth. The number of follow-up sessions
    required and the time interval between treatments varies depending on the
    particular characteristics of the client and the anatomical site being
    treated.

        ThermoLase's spas currently offer a variety of pricing programs,
    including a fixed fee for a single treatment (occurring over two visits)
    as well as fixed fees for multiple treatments during specified time
    periods. The per-session cost of the SoftLight system to the customer is,
    in general, substantially higher than the per-session costs of
    alternative methods of hair removal, including waxing, electrolysis, and
    shaving. The total cost of the SoftLight treatments in comparison to
    these alternatives varies depending on factors including the body part
    treated, the pricing plan selected, and the length of time for which hair
    is removed in comparison to such alternatives.

        In September 1997, ThermoLase introduced SoftLight 2.0, a
    modification of the hair-removal process that is intended to increase the
    effectiveness of the treatment. ThermoLase has modified its lotion,
    thereby eliminating the need for waxing, part of the process used in
    earlier treatment protocols, and added an additional step to better
    direct the laser energy into the hair follicle. ThermoLase is continuing
    to evaluate the results of the new protocol as well as the connection
    between follicle damage and long-term hair removal.

        ThermoLase opened its first Spa Thira in early fiscal 1996, and had a
    total of four opened by the end of fiscal 1996. In fiscal 1997,
    ThermoLase opened nine more domestic spas, and by October 1997 had a
    total of 14 domestic Spa Thira locations. In addition, ThermoLase's
    international arrangements resulted in the opening of spas in Paris in
    May 1997 and Lugano, Switzerland, in October 1997. A spa is also under
    construction in Dubai in the United Arab Emirates, and additional spas
    are expected to be constructed in Japan, Saudi Arabia, Brazil, and
    London, pending regulatory approvals.

        The international spas are being developed pursuant to joint ventures
    and other licensing arrangements. In January 1996, ThermoLase established
    a joint venture in Japan. During fiscal 1997, ThermoLase established
    joint ventures in France in November 1996 and England in September 1997,
    and six additional licensing arrangements: in Saudi Arabia in November
    1996; in Tunisia and Belgium in December 1996; in the United Arab
    Emirates and Oman in March 1997; in Switzerland in April 1997; in Brazil
    in June 1997; and in the United Kingdom (excluding England) and the
    Republic of Ireland in September 1997.

                                        8PAGE
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        In June 1996, ThermoLase initiated a program to license its SoftLight
    technology to physicians. In this program, ThermoLase receives a
    per-procedure royalty that varies depending on the anatomical site
    treated and pricing plan selected by the client. It also provides the
    physicians with the lasers and supplies that are necessary to perform the
    service. As of November 1997, approximately 150 lasers were placed in
    practices in 33 states and certain international markets.

        ThermoLase's existing and planned spas are designed to reflect the
    environment of a luxurious day spa. ThermoLase believes that the
    uniformity of its centers will foster brand recognition and facilitate
    the opening of new spas. ThermoLase currently uses medical staff,
    including physicians and nurses, as well as other personnel, to operate
    the SoftLight system at its centers. ThermoLase advertises the SoftLight
    system through an advertising and public relations campaign focused on
    exposure in fashion and health magazines as well as the national news
    media.

    Skin-care and Other Personal-care Products

        ThermoLase's CBI Laboratories, Inc. (CBI) subsidiary designs,
    develops, manufactures, and packages high-quality personal-care products
    for sale to retailers under its own brand names and as a contract
    manufacturer under arrangements with third parties. CBI develops and
    manufactures most of its products, which include shampoos, lotions,
    shower creams, bath salts, and facial treatments, using botanicals and
    herbal extracts. CBI has the facilities and personnel to develop new
    product formulations, design packaging layouts, mix and fill
    formulations, and package final products for distribution. CBI does not
    manufacture packaging such as containers and boxes, but contracts with
    third parties for these supplies. CBI has a portfolio of approximately
    3,000 formulations, and may manufacture up to 300 different products in a
    quarter.

    Advanced Technology Research

        The Company is currently focusing its advanced technology research
    efforts in the areas of communications, avionics, X-ray detection, signal
    processing, and lasers. The Company has developed its expertise in these
    core technologies in connection with government-sponsored research and
    development.

    Laser Communication System (lasercom)

        Lasercom is a high-speed, high-bandwidth laser communication system,
    which the Company has been developing since 1989 under government-funded
    contracts. Through fiscal 1997, the Ballistic Missile Defense
    Organization has provided funding totaling $12.4 million. The lasercom
    system, which is in early-stage beta testing, is designed to move large
    amounts of data quickly via lasers, without the need for wires. Through
    the application of its lasercom technology, Trex Communications intends
    to commercialize products to meet the growing demand for high-speed,
    digital telecommunications technology, including opportunities in

                                        9PAGE
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    ground-based networks, satellite-to-satellite crosslinks, and air-based
    systems.

        In September 1996, the Company received a $4.9 million contract (with
    options for an additional $0.4 million) from the Defense Airborne
    Reconnaissance Office (DARO) for advanced development of the lasercom
    system for use on aircraft. Under this contract, Trex Communications will
    apply its lasercom technology to develop a system that could be used on
    unmanned reconnaissance aircraft. Lasercom would provide a horizontal
    communications link to quickly transmit digitized images of the ground
    below the aircraft, for example, to another unmanned aircraft flying near
    a command post hundreds of miles away, where the information could be
    downlinked and analyzed. Under the contract, Trex Communications is
    developing a fully functional prototype to be tested using small
    commercial jets.

    Passive Microwave Camera

        The Company is developing a passive microwave camera (PMC), which is
    designed to enable the user to see objects hidden by fog and clouds and
    to see through certain opaque objects, such as building partitions. The
    PMC will be a totally passive device that emits no radiation and can
    produce real-time video images during the day or night without the
    clutter typical of radar.

        The Company believes the largest potential application of the PMC
    would be the incorporation of the device into airplanes for use during
    takeoffs, landings, and taxiing in adverse weather conditions. PMC
    acceptance is subject to certification by the Federal Aviation
    Administration (FAA). The U.S. Army has provided approximately
    $10.7 million in funding for PMC development over the last five years.
    Development continues under a $4.0 million U.S. Army Research Laboratory
    contract that was awarded in fiscal 1996.

        Under a $700,000 grant from the National Institute of Justice,
    awarded in fiscal 1997, the Company plans to conduct a PMC technology
    demonstration and evaluation program in cooperation with local law
    enforcement agencies.

    Other Projects

        In addition to the full-field digital mammography system being
    developed by Trex Medical, the Company is developing a next-generation
    digital medical imaging technology. This new system would incorporate a
    flat-panel, direct-digital detector that could provide even more
    information for earlier diagnoses. This system is based on complementary
    metal oxide semiconductor (CMOS) technology. The CMOS system would
    "directly" detect the X-rays and convert them into digital information,
    as opposed to converting them into visible light first before being
    digitized, as is the case with the Company's current full-field digital
    technology. Trex Medical has the right to license this technology as it
    pertains to certain medical applications. The Company is also exploring
    other nonmedical applications for this flat-panel direct-digital
    detection technology.

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        The Company is currently working on government-funded projects in
    several areas, including: (1) space surveillance - Under a contract from
    the U.S. Air Force Phillips Laboratory awarded in 1993, the Company is
    designing and building a system to produce high-resolution images of low-
    earth-orbit satellites. Through fiscal 1997, the Company has received
    $11.4 million under this contract. (2) ROBS (rapid optical beam steering)
    laser radar system - The Company has developed and extensively tested the
    ROBS system over the last 10 years, supported by more than $28 million in
    government funding. In fiscal 1996, the Company received a three-year
    $8.8 million contract from the U.S. Naval Air Warfare Center at China
    Lake, California, to continue development of this system, which is
    designed to simultaneously track multiple, fast-moving airborne objects
    with extreme precision. In July 1996, the Company received a $5.9 million
    contract from the U.S. Army Missile Command to build a new version of
    ROBS to meet Army specifications.

        (ii) New Products

        The Company's business includes the research and development of new
    products. (see "Principal Products and Services.")

        (iii) Raw Materials

        In connection with its SoftLight 2.0 process, ThermoLase currently
    uses a hydrogel product that is currently available from only one source.
    ThermoLase has been able to obtain an adequate supply of hydrogel to
    satisfy its current needs for the product, but there can be no assurance
    that it will be able to do so indefinitely or that it will continue to be
    able to obtain an adequate supply of the product at prices acceptable to
    ThermoLase. Other raw materials, components, and supplies purchased by
    the Company are either available from a number of different suppliers or
    from alternative sources that could be developed without a material
    adverse effect on the Company. To date, the Company has experienced no
    difficulties in obtaining these materials.

        (iv) Patents, Licenses, and Trademarks

        The Company protects its intellectual property through patents,
    trademarks, and trade secrets, as appropriate. In addition to relying on
    patents, the Company protects some of its technology as trade secrets and
    uses trademarks in association with certain products. The Company also
    enters into licensing arrangements to acquire rights in technology.

        The technology underlying the SoftLight system, including all patents
    issued thereon, belongs to the Company by virtue of a license agreement
    executed in February 1993 between ThermoLase and the inventor of the
    system, which grants ThermoLase an irrevocable, exclusive, worldwide,
    perpetual license to the technology in exchange for a $0.1 million
    commitment fee and a royalty equal to 0.25% of revenues generated from
    the sale or use of the SoftLight system through February 10, 2010.

        Patented inventions of the Company include certain mammography and
    other X-ray equipment, lasers, telescopes, high-power diamond switches,

                                       11PAGE
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    laser-radar devices, microwave cameras, a laser-based hair-removal
    process, a Sonic CT system, a wind-shear detector, and methods of
    producing composites and ultrafine particles. Patent applications are
    pending on certain mammography equipment, a passive microwave camera, and
    a free-space laser communication system.

        The Company is a defendant in certain patent litigation and has been
    notified that it allegedly infringes certain other technology owned by a
    third party. See information under the heading "Intellectual Property
    Rights, Uncertainties, and Litigation" under the heading "Forward-looking
    Statements" in the Registrant's Fiscal 1997 Annual Report to
    Shareholders, which information is incorporated herein by reference.

        Several of the Company's patents were the result of research programs
    funded by the U.S. government. With the exception of a prohibition on
    disclosure of classified technology, the government does not impose
    significant restrictions on the Company's use of government-sponsored
    technology. The government retains a non-exclusive, royalty-free license
    to use technology developed under government contracts for government
    purposes, and could, in certain circumstances, transfer all commercial
    rights to technology to a third party if the Company does not pursue its
    development.

        (v) Seasonal Influences

        There are no significant seasonal influences on the Company's sales
    of products and services.

        (vi) Working Capital Requirements

        There are no special inventory requirements or credit terms extended
    to customers that would have a material adverse effect on the Company's
    working capital.

        (vii) Dependency on a Single Customer

        Medical Products segment revenues from OEM sales of a modified design
    of Trex Medical's stereotactic prone breast-biopsy system to U.S.
    Surgical accounted for 17% of Medical Products segment revenues and 14%
    of the Company's total revenues in fiscal 1997. No single customer
    accounted for more than 10% of the revenues of the Personal-care Products
    and Services segment in fiscal 1997. U.S. government agencies accounted
    for substantially all of the Advanced Technology Research segment
    revenues in fiscal 1997. The Company's Advanced Technology Research
    segment is heavily dependent on government funding through several
    agencies, and the loss of any of such agencies or customers would have a
    material adverse effect on this segment. 

        (viii) Backlog

        The backlog of firm orders for the Medical Products segment was
    $49.3 million as of September 27, 1997, compared with $65.3 million as of
    September 28, 1996. The backlog at September 28, 1996, was affected by a
    build-up of new orders for Trex Medical's M-IV mammography system, which

                                       12PAGE
<PAGE>
    it began shipping in late fiscal 1996, and the timing of certain orders
    received in late fiscal 1996. The backlog of firm orders for the
    Personal-care Products and Services segment, which consisted exclusively
    of orders for CBI's products, was $2.8 million as of September 27, 1997,
    compared with $5.5 million as of September 28, 1996. The Company
    estimates that CBI will continue to represent a decreasing portion of
    total segment revenues as revenues from hair-removal services increase.
    The backlog of firm orders for the Advanced Technology Research segment
    was $15.0 million as of September 27, 1997, compared with $17.9 million
    as of September 28, 1996. Substantially all government contract orders
    included in this backlog were funded at September 27, 1997. The Company
    does not believe that the decreases in backlog are necessarily indicative
    of a trend. The Company believes that substantially all of its fiscal
    1997 backlog will be completed during fiscal 1998.

        (ix) Government Contracts

        Less than 10% of the Company's total revenues in fiscal 1997 were
    derived from contracts or subcontracts with the federal government, which
    are subject to renegotiation of profits or termination. There are no
    pending or, to the Company's knowledge, threatened renegotiations or
    terminations that are material to the Company.

        (x) Competition

    Medical Products

        The healthcare industry in general, and the market for imaging
    products in particular, is highly competitive. Trex Medical competes with
    a number of companies, many of which have substantially greater
    financial, marketing, and other resources than Trex Medical. Trex
    Medical's competitors include large companies such as GE, the Philips
    Medical Systems North America Company subsidiary of Philips N.V.
    (Philips), the Siemens Corporation subsidiary of Siemens AG (Siemens),
    Toshiba American Medical Systems, Inc., Toshiba America MRI, Inc.,
    Shimadzu, and Picker International, Inc., which compete in most
    diagnostic imaging modalities, including X-ray imaging. In addition, a
    significant portion of Trex Medical's sales are to U.S. Surgical and GE
    through OEM arrangements. The products sold through such OEM agreements
    compete with those offered by Trex Medical directly and through its
    independent dealers. Trex Medical's StereoLoc II, Cytoguide, and
    StereoGuide breast-biopsy systems compete with products offered by GE,
    Fischer Imaging Corporation, and Philips, and with conventional surgical
    biopsy procedures. Trex Medical competes primarily on the basis of
    product features, product performance, and reputation as well as price
    and service. Trex Medical believes that competition is likely to increase
    as a result of healthcare cost-containment pressures and the development
    of alternative diagnostic and interventional technologies.

    Personal-care Products and Services

        ThermoLase expects that, in the near term, the principal competitors
    relative to the hair-removal treatment using the SoftLight system will be
    electrolysis providers. The electrolysis market is characterized by many

                                       13PAGE
<PAGE>
    small practitioners. Although ThermoLase believes that it has a
    significant competitive advantage over electrolysis, it does not have the
    well-established network of client relationships that many electrologists
    have. Over time, it is expected that ThermoLase will face growing
    competition from other laser-based hair-removal services. Four other
    laser manufacturers received market clearance from the FDA in 1997 for
    hair removal. ThermoLase expects that others, in addition to the laser
    companies that currently have clearance for hair removal, will seek to
    develop similar technologies and products that may compete directly with
    the SoftLight system. ThermoLase's services will also compete with other
    hair-removal products and methods. ThermoLase believes that competition
    for its hair-removal services is based primarily on efficacy, price,
    comfort, and safety.

        Should it receive clearance to market the SoftLight Rejuvenation
    Laser system for skin resurfacing, ThermoLase expects that its principal
    competitors will be providers of carbon dioxide laser and chemical peel
    resurfacing and traditional spa-based services. ThermoLase believes that
    its SoftLight Rejuvenation skin treatment system will offer customers an
    alternative to more aggressive skin-texture and wrinkle-treatment
    methods. 

        The professional skin-care and bath-and-body products markets are
    highly competitive. In selling its Salon product line, CBI competes with
    a number of small manufacturers and divisions of larger companies. The
    competition in this market is fragmented with no one competitor
    dominating the market. In the Custom Design and Store Brands groups, CBI
    competes with numerous contract packaging companies that can prepare and
    package custom formulations for customers. Some of these competitors have
    substantially greater financial, marketing, and research and development
    resources than those of ThermoLase. CBI competes in these markets by
    offering its customers exclusive product lines that ThermoLase believes
    can generally be sold at a lower price but with higher margins than CBI's
    competitors.

    Advanced Technology Research

        Trex Communications is engaged in segments of the telecommunications
    industry that are extremely competitive. In its lasercom division, Trex
    Communications expects to compete with large telecommunication service
    providers, such as the regional Bell operating companies, competitive
    access providers, and microwave and cellular service providers. Such
    companies have substantially greater financial, technical, marketing, and
    other resources than Trex Communications. Trex Communications' goal,
    however, is to enter into strategic relationships with certain of these
    competitors to provide components for the network systems that Trex
    Communications is developing and to market and sell lasercom technology
    and services. No assurance can be given that Trex Communications will be
    successful in creating such strategic relationships. In addition, Trex
    Communications' lasercom division expects to compete with other laser-
    based communication hardware and software providers, most of which have
    greater financial, technical, marketing, and other resources than Trex
    Communications.

                                       14PAGE
<PAGE>
        Trex Communications' CCS subsidiary competes with a number of call
    automation companies, primarily on the basis of product features, product
    performance, and reputation, as well as price and service. Some of CCS'
    competitors have substantially greater financial, technical, marketing,
    and other resources than CCS.

        The Company competes for its research and development programs
    principally on the basis of technological innovations. As government
    funding becomes more scarce, particularly for defense projects, the
    competition for such funding will become more intense. In addition, as
    the Company's programs move from the development stage to procurement of
    large-scale, electro-optical systems, competition is expected to develop
    and intensify. Some of the Company's competitors for research and
    development funding and procurement have substantially greater resources
    than those of the Company.

        As the Company develops commercial products, it expects to encounter
    competition from various sources, including companies that will have
    substantially greater technical, marketing, and financial resources than
    those of the Company. The Company believes that its overall success will
    depend primarily on its ability to continue to make technological
    advances.

        (xi) Research and Development

        During the years ended September 27, 1997, and September 28, 1996,
    and the nine months ended September 30, 1995, the Company incurred
    $32,067,000, $24,986,000, and $13,430,000, respectively, on internally
    sponsored research and development programs, and $11,667,000,
    $10,278,000, and $11,803,000, respectively, on research and development
    programs sponsored by others. Approximately 344 professional employees
    were engaged full-time in research and development activities at
    September 27, 1997.

        (xii) Environmental Protection Regulations

        The Company believes that compliance with federal, state, and local
    environmental regulations will not have a material adverse effect on its
    capital expenditures, earnings, or competitive position. 

        (xiii) Number of Employees

        As of September 27, 1997, the Company had a total of 1,712 employees.

    (d) Financial Information about Exports by Domestic Operations

        Financial information about exports by domestic operations is
    summarized in Note 13 to Consolidated Financial Statements in the
    Registrant's Fiscal 1997 Annual Report to Shareholders, which information
    is incorporated herein by reference.

                                       15PAGE
<PAGE>
    (e) Executive Officers of the Registrant

                                  Present Title (Fiscal Year First
    Name                    Age   Became Executive Officer)
    ---------------------------------------------------------------------
    Gary S. Weinstein       40    Chief Executive Officer (1996)
    John N. Hatsopoulos     63    Chief Financial Officer and
                                    Vice President (1990)
    Dr. Kenneth Y. Tang     50    Senior Vice President (1990)
    David A. Teitel         34    Vice President, Finance (1996)
    Paul F. Kelleher        55    Chief Accounting Officer (1990)
    Hal Kirshner            56    President and Chief Executive Officer,
                                    Trex Medical Corporation (1992)

        Each executive officer serves until his successor is chosen or
    appointed by the Board of Directors and qualified, or until earlier
    resignation, death, or removal. All executive officers, except Messrs.
    Weinstein, Kirshner, and Teitel have held comparable positions for at
    least five years with the Company or Thermo Electron. Mr. Weinstein has
    been Chief Executive Officer of the Company since February 1996. For at
    least five years prior to joining the Company, Mr. Weinstein held various
    positions at Lehman Brothers, an investment banking firm, including
    heading its global syndicate and equity capital market group from March
    1995 until joining the Company. Mr. Kirshner was President of Lorad from
    January 1991 to April 1997. Mr. Teitel has been Vice President, Finance
    of the Company since August 1996. Prior to joining the Company, Mr.
    Teitel was Vice President, Finance of Deknatel Snowden Pencer, Inc.
    (Deknatel), a manufacturer of specialty surgical products, from May 1995
    to August 1996, and was Director of Finance at Deknatel from August 1994
    to May 1995. From August 1985 to August 1994, Mr. Teitel held various
    positions at Arthur Andersen LLP, a professional services firm.
    Messrs. Hatsopoulos and Kelleher are full-time employees of Thermo
    Electron, but devote such time to the affairs of the Company as the
    Company's needs reasonably require.

    Item 2. Properties

        The location and general character of the Company's principal
    properties as of September 27, 1997, are as follows:

    Medical Products

        Trex Medical owns two office and manufacturing facilities: a
    62,500-square-foot facility in Danbury, Connecticut, and a
    164,000-square-foot facility in Broadview, Illinois. Trex Medical leases
    a 120,000-square-foot office and manufacturing facility in Copiague, New
    York, under a lease expiring in 2005, and a 156,000-square-foot office
    and manufacturing facility in Littleton, Massachusetts, under a lease
    expiring in 2012, and a 60,000-square-foot office and manufacturing
    facility in Danbury, Connecticut, under a lease expiring in 2007.

                                       16PAGE
<PAGE>
    Personal-care Products and Services

        ThermoLase occupies approximately 213,000 square feet of office and
    manufacturing space in Carrollton, Texas, under a lease expiring in 2004,
    through its CBI subsidiary. ThermoLase also occupies approximately
    83,000 square feet of retail space for its Spa Thira salons, under leases
    expiring from 2000 through 2013.

    Advanced Technology Research

        The Company currently leases 90,000 square feet of office,
    engineering, and laboratory space in San Diego under a lease expiring in
    2006. In addition, CCS leases office, engineering, and manufacturing
    space of 42,000 and 4,000 square feet in Georgia and England,
    respectively, under leases expiring from 2001 through 2003. The Company
    also leases 25,000 square feet of office and warehouse facilities in San
    Diego under leases expiring in fiscal 1998.

        The Company believes that its facilities are in good condition and
    are suitable and adequate to meet current needs.

    Item 3. Legal Proceedings

        In April 1992, Fischer Imaging Corporation (Fischer) commenced a
    lawsuit in the United States District Court, District of Colorado,
    against Lorad, alleging that Lorad's prone breast-biopsy system infringes
    a Fischer patent on a precision mammographic needle-biopsy system. As of
    September 27, 1997, the Company had recognized aggregate revenues of
    approximately $107.1 million from the sale of such systems. The suit
    requests a permanent injunction, treble damages, and attorneys' fees and
    expenses. If the Company is unsuccessful in defending this lawsuit, it
    may be enjoined from manufacturing and selling its prone breast-biopsy
    system without a license from Fischer. No assurance can be given that the
    Company will be able to obtain such a license, if required, on
    commercially reasonable terms, if at all. In addition, the Company may be
    subject to damages for past infringement. No assurance can be given as to
    the amount that the Company may eventually be required to pay in expenses
    or in such damages.


    Item 4. Submission of Matters to a Vote of Security Holders

        Not applicable.

                                       17PAGE
<PAGE>
                                     PART II

    Item 5. Market for Registrant's Common Equity and Related Stockholder
            Matters

        Information concerning the market and market price for the
    Registrant's Common Stock, $.01 par value, and dividend policy is
    included under the sections labeled "Common Stock Market Information" and
    "Dividend Policy" in the Registrant's Fiscal 1997 Annual Report to
    Shareholders and is incorporated herein by reference.


    Item 6. Selected Financial Data

        The information required under this item is included under the
    sections labeled "Selected Financial Information" and "Dividend Policy"
    in the Registrant's Fiscal 1997 Annual Report to Shareholders and is
    incorporated herein by reference.


    Item 7. Management's Discussion and Analysis of Financial Condition and
            Results of Operations

         The information required under this item is included under the
    heading "Management's Discussion and Analysis of Financial Condition and
    Results of Operations" in the Registrant's Fiscal 1997 Annual Report to
    Shareholders and is incorporated herein by reference.


    Item 8. Financial Statements and Supplementary Data

        The Registrant's Consolidated Financial Statements and Supplementary
    Data are included in the Registrant's Fiscal 1997 Annual Report to
    Shareholders and are incorporated herein by reference.


    Item 9. Changes in and Disagreements with Accountants on Accounting and
            Financial Disclosures

        Not applicable.

                                       18PAGE
<PAGE>
                                    PART III

    Item 10. Directors and Executive Officers of the Registrant

        The information concerning directors required under this item is
    incorporated herein by reference from the material contained under the
    caption "Election of Directors" in the Registrant's definitive proxy
    statement to be filed with the Securities and Exchange Commission
    pursuant to Regulation 14A, not later than 120 days after the close of
    the fiscal year. The information concerning delinquent filers pursuant to
    Item 405 of Regulation S-K is incorporated herein by reference from the
    material contained under the heading "Section 16(a) Beneficial Ownership
    Reporting Compliance" under the caption "Stock Ownership" in the
    Registrant's definitive proxy statement to be filed with the Securities
    and Exchange Commission pursuant to Regulation 14A, not later than 120
    days after the close of the fiscal year.


    Item 11. Executive Compensation

        The information required under this item is incorporated herein by
    reference from the material contained under the caption "Executive
    Compensation" in the Registrant's definitive proxy statement to be filed
    with the Securities and Exchange Commission pursuant to Regulation 14A,
    not later than 120 days after the close of the fiscal year.


    Item 12. Security Ownership of Certain Beneficial Owners and Management

         The information required under this item is incorporated herein by
    reference from the material contained under the caption "Stock Ownership"
    in the Registrant's definitive proxy statement to be filed with the
    Securities and Exchange Commission pursuant to Regulation 14A, not later
    than 120 days after the close of the fiscal year.


    Item 13. Certain Relationships and Related Transactions

        The information required under this item is incorporated herein by
    reference from the material contained under the caption "Relationship
    with Affiliates" in the Registrant's definitive proxy statement to be
    filed with the Securities and Exchange Commission pursuant to Regulation
    14A, not later than 120 days after the close of the fiscal year.

                                       19
PAGE
<PAGE>
                                     PART IV

    Item 14. Exhibits, Financial Statement Schedules, and Reports on Form 8-K

    (a, d)   Financial Statements and Schedules

             (1)The consolidated financial statements set forth in the list
                below are filed as part of this Report.

             (2)The consolidated financial statement schedule set forth in
                the list below is filed as part of this Report.

             (3)Exhibits filed herewith or incorporated herein by reference
                are set forth in Item 14(c) below.

             List of Financial Statements and Schedules Referenced in this
             Item 14

             Information incorporated by reference from Exhibit 13 filed
             herewith:

                Consolidated Statement of Income
                Consolidated Balance Sheet
                Consolidated Statement of Cash Flows
                Consolidated Statement of Shareholders' Investment
                Notes to Consolidated Financial Statements
                Report of Independent Public Accountants

             Financial Statement Schedules filed herewith:

                Schedule II: Valuation and Qualifying Accounts

             All other schedules are omitted because they are not applicable
             or not required, or because the required information is shown
             either in the financial statements or in the notes thereto.

       (b)   Reports on Form 8-K

             None.

       (c)   Exhibits

             See Exhibit Index on the page immediately preceding exhibits.

                                       20PAGE
<PAGE>
                                   SIGNATURES

        Pursuant to the requirements of Section 13 or 15(d) of the Securities
    Exchange Act of 1934, the Registrant has duly caused this report to be
    signed by the undersigned, thereunto duly authorized.

    Date: December 5, 1997                  THERMOTREX CORPORATION

                                            By: Gary S. Weinstein
                                                -----------------------
                                                Gary S. Weinstein
                                                Chief Executive Officer

        Pursuant to the requirements of the Securities Exchange Act of 1934,
    this report has been signed below by the following persons on behalf of
    the Registrant and in the capacities indicated, as of December 5, 1997.

    Signature                           Title
    ---------                           -----

    By: Gary S. Weinstein              Chief Executive Officer, Chairman
        -----------------------------   of the Board, and Director
        Gary S. Weinstein                 

    By: John N. Hatsopoulos         Vice President, Chief Financial
        -----------------------------   Officer, and Director
        John N. Hatsopoulos               

    By: Paul F. Kelleher            Chief Accounting Officer
        -----------------------------
        Paul F. Kelleher

    By: Morton Collins              Director
        -----------------------------
        Morton Collins

    By: Peter O. Crisp              Director
        -----------------------------
        Peter O. Crisp

    By: Paul F. Ferrari             Director
        -----------------------------
        Paul F. Ferrari

    By: Dr. George N. Hatsopoulos   Director
        -----------------------------
        Dr. George N. Hatsopoulos

    By: _____________________________   Director
        Robert C. Howard

    By:                                 Director
        -----------------------------
        Nicholas T. Zervas


                                       21PAGE
<PAGE>
                    Report of Independent Public Accountants

    To the Shareholders and Board of Directors of ThermoTrex Corporation:

        We have audited, in accordance with generally accepted auditing
    standards, the consolidated financial statements included in ThermoTrex
    Corporation's Annual Report to Shareholders incorporated by reference in
    this Form 10-K, and have issued our report thereon dated November 3,
    1997. Our audits were made for the purpose of forming an opinion on those
    statements taken as a whole. The schedule listed in Item 14 on page 20 is
    the responsibility of the Company's management and is presented for
    purposes of complying with the Securities and Exchange Commission's rules
    and is not part of the basic consolidated financial statements. The
    schedule has been subjected to the auditing procedures applied in the
    audits of the basic consolidated financial statements and, in our
    opinion, fairly states in all material respects the consolidated
    financial data required to be set forth therein in relation to the basic
    consolidated financial statements taken as a whole.



                                                Arthur Andersen LLP



    Boston, Massachusetts
    November 3, 1997

                                       22PAGE
<PAGE>
  SCHEDULE II

                             THERMOTREX CORPORATION

                        Valuation and Qualifying Accounts
                                 (In thousands)



                                  Provision
                      Balance at    Charged    Accounts                Balance
                       Beginning         to     Written                 at End
  Description          of Period    Expense         Off    Other(a)  of Period
  -----------         ----------  ---------    --------    --------  ---------
  Allowance for
    Doubtful Accounts

  Year Ended
    September 27, 1997    $1,586    $  279      $ (164)     $  268     $1,969
   
  Year Ended
    September 28, 1996    $1,141    $  336      $ (163)     $  272     $1,586

  Nine Months Ended
    September 30, 1995    $  643    $  178      $    -      $  320     $1,141

  (a) Allowances of businesses acquired during the year as described in Note 3
      to Consolidated Financial Statements in the Registrant's Fiscal 1997
      Annual Report to Shareholders.

                                       23PAGE
<PAGE>
                                  EXHIBIT INDEX

    Exhibit
    Number     Description of Exhibit

      3.1      Restated Certificate of Incorporation, as amended (filed as
               Exhibit 3(i) to the Registrant's Quarterly Report on Form
               10-Q for the fiscal quarter ended July 2, 1994 [File No.
               1-10791] and incorporated herein by reference).

      3.2      By-Laws of the Registrant, as amended and restated (filed as
               Exhibit 3.2 to the Registrant's Transition Report on Form
               10-K for the transition period January 1, 1995, through
               September 30, 1995 [File No. 1-10791] and incorporated herein
               by reference).

      4.1      Indenture dated as of October 28, 1997, by and among the
               Registrant, Thermo Electron Corporation, and Bankers Trust
               Company, as Trustee, relating to $124.5 principal amount of
               the Registrant's 3 1/4% Subordinated Convertible Debentures
               due 2007 (filed as Exhibit 4.1 to the Registrant's Current
               Report on Form 8-K dated October 28, 1997, and filed with the
               Securities and Exchange Commission on October 29, 1997, and
               incorporated herein by reference).

      4.2      Fiscal Agency Agreement dated as of August 12, 1997, among
               ThermoLase Corporation, Thermo Electron Corporation, and
               Bankers Trust Company, as Fiscal Agent, relating to
               $115,000,000 principal amount of ThermoLase's 4 3/8%
               Subordinated Convertible Debentures due 2004 (filed as
               Exhibit 4.3 to ThermoLase Corporation's Annual Report on Form
               10-K for the fiscal year ended September 27, 1997 [File No.
               1-13104] and incorporated herein by reference).

     10.1      Asset Transfer Agreement dated December 29, 1990, between
               Thermo Electron Corporation and the Registrant (filed as
               Exhibit 10(a) to the Registrant's Registration Statement on
               Form S-1 [Reg. No. 33-40972] and incorporated herein by
               reference).

     10.2      Amended and Restated Corporate Services Agreement dated
               January 3, 1993, between Thermo Electron Corporation and the
               Registrant (filed as Exhibit 10(b) to the Registrant's Annual
               Report on Form 10-K for the fiscal year ended January 2, 1993
               [File No. 1-10791] and incorporated herein by reference).

     10.3      Form of Indemnification Agreement between the Registrant and
               its officers and directors (filed as Exhibit 10(f) to the
               Registrant's Registration Statement on Form S-1
               [Reg. No. 33-40972] and incorporated herein by reference).

     10.4      Thermo Electron Corporate Charter as amended and restated
               effective January 3, 1993 (filed as Exhibit 10(g) to the
               Registrant's Annual Report on Form 10-K for the fiscal year
               ended January 2, 1993 [File No. 1-10791] and incorporated
               herein by reference).

                                       24PAGE
<PAGE>
                                  EXHIBIT INDEX
    Exhibit
    Number     Description of Exhibit
     10.5      Stock Option Agreement granted to Anthony J. Pellegrino dated
               November 16, 1992 (filed as Exhibit 10(n) to the Registrant's
               Annual Report on Form 10-K for the fiscal year ended
               January 2, 1993 [File No. 1-10791] and incorporated herein by
               reference).

     10.6      Stock Option Agreement granted to Hal Kirshner dated
               November 16, 1992 (filed as Exhibit 10(o) to the Registrant's
               Annual Report on Form 10-K for the fiscal year ended
               January 2, 1993 [File No. 1-10791] and incorporated herein by
               reference).

     10.7      Lease dated October 12, 1988, between CBI Laboratories, Inc.,
               Trammell Crow Company No. 91, and Petula Associates Ltd., as
               amended (filed as Exhibit 10.18 to the Registrant's Annual
               Report on Form 10-K for the fiscal year ended January 1, 1994
               [File No. 1-10791] and incorporated herein by reference).

     10.8      Lease dated September 1, 1993, between CBI Laboratories, Inc.
               and Lincoln Valwood, Ltd. (filed as Exhibit 10.19 to the
               Registrant's Annual Report on Form 10-K for the fiscal year
               ended January 1, 1994 [File No. 1-10791] and incorporated
               herein by reference).

     10.9      Master Repurchase Agreement dated as of January 1, 1994,
               between the Registrant and Thermo Electron Corporation.

     10.10     Master Guarantee Reimbursement Agreement dated as of January
               1, 1994, among the Registrant, ThermoLase Corporation, and
               Thermo Electron Corporation (filed as Exhibit 10.6 to
               ThermoLase's Registration Statement on Form S-1 [Reg. No.
               33-78052] and incorporated herein by reference).

     10.11     Lease executed February 9, 1995, between LMP Properties Ltd.
               and the Registrant (filed as Exhibit 10.22 to the
               Registrant's Annual Report on Form 10-K for the fiscal year
               ended December 31, 1994 [File No. 1-10791] and incorporated
               herein by reference).

     10.12     Stock purchase agreement dated as of September 15, 1995, by
               and among Bennett X-Ray Corporation, ThermoTrex Corporation,
               and Calvin Kleinman, Robert P. Coe, Walter F. Schneider, and
               Martin Koening (filed as Exhibit 2 to the Registrant's
               Current Report on Form 8-K dated September 14, 1995 [File No.
               1-10791] and incorporated herein by reference).

     10.13     Lease dated as of September 15, 1995, by and among the
               Registrant and BK Realty Associates, L.P. and Calrob Realty
               Associates (filed as Exhibit 10.26 to the Registrant's
               Transition Report on Form 10-K for the transition period
               January 1, 1995, through September 30, 1995 [File No.
               1-10791] and incorporated herein by reference). 
                                       25PAGE
<PAGE>
                                  EXHIBIT INDEX

    Exhibit
    Number     Description of Exhibit

     10.14     Incentive Stock Option Plan of the Registrant (filed as
               Exhibit 10(h) to the Registrant's Registration Statement on
               Form S-1 [Reg. No. 33-40972] and incorporated herein by
               reference). (Maximum number of shares issuable in the
               aggregate under this plan and the Registrant's Nonqualified
               Stock Option Plan is 1,945,000 shares, after adjustment to
               reflect share increases approved in 1992 and 1993 and 3-for-2
               stock split effected in October 1993).

     10.15     Nonqualified Stock Option Plan of the Registrant (filed as
               Exhibit 10(i) to the Registrant's Registration Statement on
               Form S-1 [Reg. No. 33-40972] and incorporated herein by
               reference). (Maximum number of shares issuable in the
               aggregate under this plan and the Registrant's Incentive
               Stock Option Plan is 1,945,000 shares, after adjustment to
               reflect share increases approved in 1992 and 1993 and 3-for-2
               stock split effected in October 1993).

     10.16     ThermoTrex Corporation - ThermoLase Corporation (formerly
               ThermoLase Inc.) Nonqualified Stock Option Plan (filed as
               Exhibit 10.53 to the Registrant's Annual Report on Form 10-K
               for the fiscal year ended January 1, 1994 [File No. 1-10791]
               and incorporated herein by reference).

     10.17     ThermoTrex Corporation - Trex Medical Corporation
               Nonqualified Stock Option Plan (filed as Exhibit 10.73 to
               Thermo Cardiosystems' Annual Report on Form 10-K for the
               fiscal year ended December 30, 1995 [File No. 1-10114] and
               incorporated herein by reference).

     10.18     ThermoTrex Corporation - Trex Communications Corporation
               Nonqualified Stock Option Plan.

     10.19     Directors Stock Option Plan of the Registrant (filed as
               Exhibit 10.26 to the Registrant's Annual Report on Form 10-K
               for the fiscal year ended December 31, 1994 [File No.
               1-10791] and incorporated herein by reference).

               In addition to the stock-based compensation plans of the
               Registrant, the executive officers of the Registrant may be
               granted awards under stock-based compensation plans of Thermo
               Electron Corporation for services rendered to the Registrant
               or such affiliated corporations. Such plans were filed as
               Exhibits 10.21 through 10.45 to the Annual Report on Form
               10-K of Thermo Electron for the fiscal year ended December
               28, 1996 [File No. 1-8002] and are incorporated herein by
               reference.

                                       26PAGE
<PAGE>
                                  EXHIBIT INDEX
    Exhibit
    Number     Description of Exhibit
     10.20     Operating Agreement of ThermoLase Japan L.L.C. dated as of
               January 22, 1996, between ThermoLase Corporation and Fox
               River Japan Partners, L.P. (filed as Exhibit 10.1 to
               ThermoLase's Quarterly Report on Form 10-Q for the quarter
               ended December 30, 1995 [File No. 1-13104] and incorporated
               herein by reference).

     10.21     License Agreement dated as of January 22, 1996, between
               ThermoLase Corporation and ThermoLase Japan L.L.C. (filed as
               Exhibit 10.2 to ThermoLase's Quarterly Report on Form 10-Q
               for the quarter ended December 30, 1995 [File No. 1-13104]
               and incorporated herein by reference).

     10.22     Option Agreement dated as of January 22, 1996, between
               ThermoLase Corporation and Fox River Japan Partners, L.P.
               (filed as Exhibit 10.3 to ThermoLase's Quarterly Report on
               Form 10-Q for the quarter ended December 30, 1995 [File No.
               1-13104] and incorporated herein by reference).

     10.23     Amendment to Operating Agreement of ThermoLase Japan L.L.C.
               dated as of May 1, 1996, by and among ThermoLase Corporation,
               Fox River Partners L.P., and ThermoLase Japan L.L.C. (filed
               as Exhibit 10.29 to ThermoLase Corporation's Annual Report on
               Form 10-K for the fiscal year ended September 27, 1997 [File
               No. 1-13104] and incorporated herein by reference).

     10.24     License Agreement dated as of October 30, 1995, between
               ThermoLase Corporation and Ronald G. Wheeland, M.D.,
               Professional Corporation (filed as Exhibit 10.4 to
               ThermoLase's Quarterly Report on Form 10-Q for the quarter
               ended December 30, 1995 [File No. 1-13104] and incorporated
               herein by reference).

     10.25     Management Agreement dated as of October 30, 1995, between
               ThermoLase Corporation and Ronald G. Wheeland, M.D.,
               Professional Corporation (filed as Exhibit 10.5 to
               ThermoLase's Quarterly Report on Form 10-Q for the quarter
               ended December 30, 1995 [File No. 1-13104] and incorporated
               herein by reference).

     10.26     Sublease Agreement dated as of October 30, 1995, between
               ThermoLase Corporation and Ronald G. Wheeland, M.D.,
               Professional Corporation (filed as Exhibit 10.6 to
               ThermoLase's Quarterly Report on Form 10-Q for the quarter
               ended December 30, 1995 [File No. 1-13104] and incorporated
               herein by reference).

     10.27     Lease dated as of April 12, 1995, between ThermoLase
               Corporation and The Goldberg Family Trust (filed as Exhibit
               10.7 to ThermoLase's Quarterly Report on Form 10-Q for the
               quarter ended December 30, 1995 [File No. 1-13104] and
               incorporated herein by reference).
                                       27PAGE
<PAGE>
                                  EXHIBIT INDEX

    Exhibit
    Number     Description of Exhibit

     10.28     Lease dated as of December 8, 1995, between ThermoLase
               Corporation and Canon Properties (filed as Exhibit 10.8 to
               ThermoLase's Quarterly Report on Form 10-Q for the quarter
               ended December 30, 1995 [File No. 1-13104] and incorporated
               herein by reference).

     10.29     Lease dated as of January 17, 1996, between ThermoLase
               Corporation and Trammell Crow Equity Partners (filed as
               Exhibit 10.9 to ThermoLase's Quarterly Report on Form 10-Q
               for the quarter ended December 30, 1995 [File No. 1-13104]
               and incorporated herein by reference).

     10.30     Lease dated as of December 20, 1995, between Melvyn J. Powers
               and Mary P. Powers D/B/A M&M Realty and Trex Medical
               Corporation as amended (filed as Exhibit 10.14 to Trex
               Medical's Registration Statement on Form S-1 [Reg. No.
               333-2926] and incorporated herein by reference).

     10.31     Lease dated May 29, 1996, between John K. Grady, Trustee of
               Concord Associates Foster Street Trust and XRE Corporation
               (filed as Exhibit 10.89 to Trex Medical's Registration
               Statement on Form S-1 [Reg. No. 333-2926] and incorporated
               herein by reference).

     10.32     Asset Purchase Agreement dated September 4, 1996, by and
               among CXR Acquisition Corp., Trex Medical Corporation,
               Continental X-Ray Corporation, Alphatek Corporation,
               Broadview Manufacturing Corporation, Haymarket Square
               Associates, Advanced Medical Imaging, Inc., Trans-Continental
               X-ray Corporation, and the Stockholders and Partners thereof
               (filed as Exhibit 10.21 to Trex Medical's Registration
               Statement on Form S-1 [Reg. No. 333-15381] and incorporated
               herein by reference).

     10.33     Master Joint Venture Agreement dated as of October 30, 1996,
               among ThermoLase Corporation, Franklin Holdings, S.A., and
               Yves Micheli (filed as Exhibit 10.26 to ThermoLase's Annual
               Report on Form 10-K for the fiscal year ended September 28,
               1996 [File No. 1-13104] and incorporated herein by
               reference).

     10.34     SoftLight and Spa Thira Franchise and License Agreement dated
               as of November 8, 1996, between ThermoLase Corporation and
               Medical Supply & Service Co. (filed as Exhibit 10.27 to
               ThermoLase's Annual Report on Form 10-K for the fiscal year
               ended September 28, 1996 [File No. 1-13104] and incorporated
               herein by reference).

                                       28PAGE
<PAGE>
                                  EXHIBIT INDEX

    Exhibit
    Number     Description of Exhibit

     10.35     Equipment License Agreement for SoftLight Lasers dated as of
               November 8, 1996, between ThermoLase Corporation and Medical
               Supply & Service Co. (filed as Exhibit 10.28 to ThermoLase's
               Annual Report on Form 10-K for the fiscal year ended
               September 28, 1996 [File No. 1-13104] and incorporated herein
               by reference).

     10.36     Promissory Note due April 30, 1997, issued by the Registrant
               to Thermo Electron Corporation (filed as Exhibit 10.35 to the
               Registrant's Annual Report on Form 10-K for the fiscal year
               ended September 28, 1996, and incorporated herein by
               reference).

     10.37     Promissory Note due October 5, 1998, issued by the Registrant
               to Thermo Electron Corporation (filed as Exhibit 10.1 to the
               Registrant's Quarterly Report on Form 10-Q for the quarter
               ended June 28, 1997, and incorporated herein by reference).

     10.38     Amended and Restated Stock Holding Assistance Plan and Form
               of Promissory Note.

     10.39     Deferred Compensation Plan for Directors of the Registrant
               (filed as Exhibit 10(j) to the Registrant's Registration
               Statement on Form S-1 [Reg. No. 33-40972] and incorporated
               herein by reference).

     11        Statement re: Computation of Earnings per Share.

     13        Annual Report to Shareholders for the fiscal year ended
               September 27, 1997 (only those portions incorporated herein
               by reference).

     21        Subsidiaries of the Registrant.

     23        Consent of Arthur Andersen LLP.

     27        Financial Data Schedule.
     
     99.1      Form of ThermoLase Corporation Unit Certificate (filed as
               Exhibit 4.1 to ThermoLase's Registration Statement on Form
               S-4 [Reg. No. 333-19633] and incorporated herein by
               reference).


                                                        EXHIBIT 10.9
                           MASTER REPURCHASE AGREEMENT

             AGREEMENT dated as of the 1st day of January, 1994 between
        Thermo Electron Corporation, a Delaware corporation ("Seller"),
        and ThermoTrex Corporation, a Delaware corporation (the "Buyer").


        1.   Applicability

             From time to time Buyer and Seller may enter into
        transactions in which Seller agrees to transfer to Buyer certain
        securities and/or financial instruments ("Securities") against
        the transfer of funds by Buyer, with a simultaneous agreement by
        Buyer to transfer to Seller such Securities on demand, against
        the transfer of funds by Seller.  Each such transaction shall be
        referred to herein as a "Transaction" and shall be governed by
        this Agreement, unless otherwise agreed in writing.

        2.   Definitions

             (a)  "Act of Insolvency", with respect to either party (i)
        the commencement by such party as debtor of any case or
        proceeding under any bankruptcy, insolvency, reorganization,
        liquidation, dissolution or similar law, or such party seeking
        the appointment of a receiver, trustee, custodian or similar
        official for such party or any substantial part of its property;
        or (ii) the commencement of any such case or proceeding against
        such party, or another seeking such an appointment, which (A) is
        consented to or not timely contested by such party, (B) results
        in the entry of an order for relief, such an appointment or the
        entry of an order having a similar effect, or (C) is not
        dismissed within 15 days; or (iii) the making by a party of a
        general assignment for the benefit of creditors; or (iv) the
        admission in writing by a party of such party's inability to pay
        such party's debts as they become due; 

             (b)  "Additional Purchased Securities", Securities provided
        by Seller to Buyer pursuant to Paragraph 4(a) hereof; 

             (c)  "Income", with respect to any Security at any time, any
        principal thereof then payable and all interest, dividends or
        other distributions thereon; 

             (d)  "Market Value", with respect to any Securities as of
        any date, the price for such Securities on such date obtained
        from a generally recognized source agreed to by the parties or
        the most recent closing bid quotation from such a source, plus
        accrued Income to the extent not included therein (other than any
        Income transferred to Seller pursuant to Paragraph 6 hereof) as
        of such date (unless contrary to market practice for such
        Securities);
PAGE
<PAGE>
             (e)  "Other Buyers", third parties that have entered into an
        agreement with Seller that is  substantially similar to this
        Agreement; 

             (f)  "Pricing Rate", a rate equal to the Commercial Paper
        Composite rate for 90-day maturities provided by Merrill Lynch,
        Pierce, Fenner & Smith Incorporated (or, if such rate is not
        available, a substantially equivalent rate agreed to by Buyer and
        Seller) plus 25 basis points,  which rate shall be adjusted on
        the first business day of each fiscal quarter and shall be in
        effect for the entirety such fiscal quarter;
         
             (g)  "Purchase Price", the price at which Purchased
        Securities are transferred by Seller to Buyer; 

             (h)  "Purchased Securities", the Securities transferred by
        Seller to Buyer in a Transaction hereunder, and any Securities
        substituted therefor in accordance with Paragraph 9 hereof.  The
        term "Purchased Securities" with respect to any Transaction at
        any time also shall include Additional Purchase Securities
        transferred pursuant to Paragraph 4(a) and shall exclude
        Securities returned pursuant to Paragraph 4(b);  

             (i)  "Repurchase Collateral Account", a book account
        maintained by Seller containing, among other Securities, the
        Purchased Securities; and

             (j)  "Repurchase Price", for any Purchased Security, an
        amount equal to the Purchase Price paid by Buyer to Seller for
        such Purchased Security. 

        3.   Transactions

             (a)  A Transaction may be initiated by Buyer upon the
        transfer of the Purchase Price to Seller's account.  Upon such
        transfer, Seller shall transfer to Buyer Purchased Securities
        having a Market Value equal to 103% of the Purchase Price.

             (b)  Purchased Securities shall be held in custody for Buyer
        by Seller in the Repurchase Collateral Account.  Seller shall
        indicate on its books for such account Buyer's ownership of the
        Purchased Securities.  Upon reasonable request from Buyer, Seller
        shall provide Buyer with a complete list of Purchased Securities
        owned by Buyer.  

             (c)  Upon demand by Buyer or Seller, Seller shall repurchase
        from Buyer, and Buyer shall sell to Seller,  for the Repurchase
        Price all or any part of the Purchased Securities then owned by
        Buyer.

                                        2PAGE
<PAGE>
        4.   Margin Maintenance

             (a)  If at any time the aggregate Market Value of all
        Purchased Securities then owned by Buyer is less than 103% of the
        aggregate Repurchase Price for such Purchased Securities, then
        Seller shall transfer to Buyer additional Securities ("Additional
        Purchased Securities"), so that the aggregate Market Value of
        such Purchased Securities, including any such Additional
        Purchased Securities, will thereupon equal or exceed  103% of
        such aggregate Repurchase Price.

             (b)  If at any time the aggregate Market Value of all
        Purchased Securities then owned by Buyer exceeds 103% of the
        aggregate Repurchase Price for such Purchased Securities, then
        Seller may transfer Purchased Securities to Seller, so that the
        aggregate Market Value of such Purchased Securities will
        thereupon not exceed 103% of such aggregate Repurchase Price.

        5.   Interest Payments

             If during any fiscal month Buyer owned Purchased Securities,
        then on the first day of the next following fiscal month Seller
        shall pay to Buyer an amount equal to the sum of the aggregate
        Repurchase Prices of the Purchased Securities owned by Buyer at
        the close of each day during the preceding fiscal month divided
        by the number of days in such month and the product multiplied by
        the Pricing Rate times the number of days in such month divided
        by 360.

        6.   Income Payments and Voting Rights

             Where a particular Transaction's term extends over an Income
        payment date on the Purchased Securities subject to that
        Transaction, Buyer shall, on the date such Income is payable,
        transfer to Seller an amount equal to such Income payment or
        payments with respect to any Purchased Securities subject to such
        Transaction.  Seller shall retain all voting rights with respect
        to Purchased Securities sold to Buyer under this Agreement.

        7.   Security Interest

             Although the parties intend that all Transactions hereunder
        be sales and purchases and not loans, in the event any such
        Transactions are deemed to be loans, Seller shall be deemed to
        have pledged to Buyer as security for the performance by Seller
        of its obligations under each such Transaction and this
        Agreement, and shall be deemed to have granted to Buyer a
        security interest in, all of the Purchased Securities with
        respect to all Transactions hereunder and all proceeds thereof.

                                        3PAGE
<PAGE>
        8.   Payment and Transfer

             Unless otherwise mutually agreed, all transfers of funds
        hereunder shall be in immediately available funds.  As used
        herein with respect to Securities, "transfer" is intended to have
        the same meaning as when used in Section 8-313 of the
        Massachusetts Uniform Commercial Code or, where applicable, in
        any federal regulation governing transfers of the Securities.

        9.   Substitution

             Buyer hereby grants Seller the authority to manage, in
        Seller's sole discretion, the Purchased Securities held in
        custody for Buyer by Seller in the Repurchase Collateral Account.
        Buyer expressly agrees that Seller may (i) substitute other
        Securities for any Purchased Securities and (ii) commingle
        Purchased Securities with other Securities held in the Repurchase
        Collateral Account.  Substitutions shall be made by transfer to
        Buyer of such other Securities and transfer to Seller of the
        Purchased Securities for which substitution is being made.  After
        substitution, the substituted Securities shall be deemed to be
        Purchased Securities.  Securities which are substituted for
        Purchased Securities shall have a Market Value at the time of
        substitution equal to or greater than the Market Value of the
        Purchase Securities for which such Securities were substituted.

        10.  Representations

             Each of Buyer and Seller represents and warrants to the
        other that (i) it is duly authorized to execute and deliver this
        Agreement, to enter into the Transactions contemplated hereunder
        and to perform its obligations hereunder and has taken all
        necessary action to authorize such execution, delivery and
        performance, (ii) the person signing this Agreement on its behalf
        is duly authorized to do so on its behalf, (iii) it has obtained
        all authorizations of any governmental body required in
        connection with this Agreement and the Transactions hereunder and
        such authorizations are in full force and effect and (iv) the
        execution, delivery and performance of this Agreement and the
        Transactions hereunder will not violate any law, ordinance,
        charter, by-law or rule applicable to it or any agreement by
        which it is bound or by which any of its assets are affected.  On
        the date for any Transaction Buyer and Seller shall each be
        deemed to repeat all the foregoing representations made by it.

        11.  Events of Default

             In the event that (i) Seller fails to repurchase or Buyer
        fails to transfer Purchased Securities upon demand for repurchase
        from either Buyer or Seller, (ii)  Seller or Buyer fails, after
        one business day's notice, to comply with Paragraph 4 hereof,
        (iii) Buyer  fails to make payment to Seller pursuant to  
        Paragraph 6 hereof, (iv) Seller fails to comply with Paragraph 5
        hereof,  (v) an Act of Insolvency occurs with respect to Seller

                                        4PAGE
<PAGE>
        or Buyer, (vi) any representation made by Seller or Buyer shall
        have been incorrect or untrue in any material respect when made
        or repeated or deemed to have been made or repeated, or (vii)
        Seller or Buyer shall admit to the other its inability to, or its
        intention not to, perform any of its obligations hereunder (each
        an "Event of Default"):

             (a)  At the option of the nondefaulting party, exercised by
        written notice to the defaulting party (which option shall be
        deemed to have been exercised, even if no notice is given,
        immediately upon the occurrence of any Act of Insolvency), Seller
        shall become obligated to repurchase, and Buyer shall become
        obligated to sell, all Purchased Securities then owned by Buyer
        for the Repurchase Price of such Purchased Securities.

             (b)  If Seller is the defaulting party and Buyer exercises
        or is deemed to have exercised the option referred to in
        subparagraph (a) of this Paragraph, (i) the Seller's obligations
        hereunder to repurchase all Purchased Securities in such
        Transactions shall thereupon become immediately due and payable,
        (ii) all Income paid after such exercise or deemed exercise shall
        be retained by Buyer and applied to the aggregate unpaid
        Repurchase Prices owed by Seller, and (iii) Seller shall
        immediately deliver to Buyer any Purchased Securities subject to
        such Transactions then in Seller's possession.

             (c)  In all Transactions in which Buyer is the defaulting
        party, upon tender by Seller of payment of the aggregate
        Repurchase Prices for all such Transactions, Buyer's right, title
        and interest in all Purchased Securities subject to such
        Transactions shall be deemed transferred to Seller, and Buyer
        shall deliver all such Purchased Securities to Seller.

             (d)  After one business day's notice to the defaulting party
        (which notice need not be given if an Act of Insolvency shall
        have occurred, and which may be the notice given under
        subparagraph (a) of this Paragraph or the notice referred to in
        clause (ii) of the first sentence of this Paragraph), the
        nondefaulting  party may: 

                  (i)  as to Transactions in which Seller is the
        defaulting party, (A) immediately sell, in a recognized market at
        such price or prices as Buyer may reasonably deem satisfactory,
        any or all Purchased Securities subject to such Transactions and
        apply the proceeds thereof to the aggregate unpaid Repurchase
        Prices and any other amounts owing by Seller hereunder or (B) in
        its sole discretion elect, in lieu of selling all or a portion of
        such Purchased Securities, to give Seller credit for such
        Purchased Securities in an amount equal to the price therefor on
        such date, obtained from a generally recognized source or the
        most recent closing bid quotation from such a source, against the
        aggregate unpaid Repurchase Prices and any other amounts owing by
        Seller hereunder; and

                                        5PAGE
<PAGE>
                  (ii)  as to Transactions in which Buyer is the
        defaulting party, (A) purchase securities ("Replacement
        Securities") of the same class and amount as any Purchased
        Securities that are not delivered by Buyer to Seller as required
        hereunder or (B) in its sole discretion elect, in lieu of
        purchasing Replacement Securities, to be deemed to have purchased
        Replacement Securities at the price therefor on such date,
        obtained from a generally recognized source or the most recent
        closing bid quotation from such a source.

             (e)  As to Transactions in which Buyer is the defaulting
        party , Buyer shall be liable to Seller (i) with respect to
        Purchased Securities (other than Additional Purchased
        Securities), for any excess of the price paid (or deemed paid) by
        Seller for Replacement Securities therefor over the Repurchase
        Price for such Purchased Securities and (ii) with respect to
        Additional Purchased Securities, for the price paid (or deemed
        paid) by Seller for the Replacement Securities therefor.  

             (f)  The defaulting party shall be liable to the
        nondefaulting party for the amount of all reasonable legal or
        other expenses incurred by the nondefaulting party in connection
        with or as a consequence of an Event of Default.

             (g)  The nondefaulting party shall have, in addition to its
        rights hereunder, any rights otherwise available to it under any
        other agreement or applicable law.

        12.  Single Agreement

             Buyer and Seller acknowledge that, and have entered hereinto
        and will enter into each Transaction hereunder in consideration
        of and in reliance upon the fact that, all Transactions hereunder
        constitute a single business and contractual relationship and
        have been made in consideration of each other.  Accordingly, each
        of Buyer and Seller agrees (i) to perform all of its obligations
        in respect of each Transaction hereunder, and that a default in
        the performance of any such obligations shall constitute a
        default by it in respect of all Transactions hereunder, (ii) that
        each of them shall be entitled to set off claims and apply
        property held by them in respect of any Transaction against
        obligations owing to them in respect of any other Transactions
        hereunder and (iii) that payments, deliveries and other transfers
         made by either of them in respect of any Transaction shall be
        deemed to have been made in consideration of payments, deliveries
        and other transfers in respect of any other Transactions
        hereunder, and the obligations to make any such payments,
        deliveries and other transfers may be applied against each other
        and netted.

                                        6PAGE
<PAGE>
        13.  Entire Agreement; Severability

             This Agreement shall supersede any existing agreements
        between the parties containing general terms and conditions for
        repurchase transactions.  Each provision and agreement and
        agreement herein shall be treated as separate and independent
        from any other provision or agreement herein and shall be
        enforceable notwithstanding the unenforceability of any such
        other provision or agreement.

        14.  Non-assignability; Termination

             The rights and obligations of the parties under this
        Agreement and under any Transactions shall not be assigned by
        either party without the prior written consent of the other
        party.  Subject to the foregoing, this Agreement and any
        Transactions shall be binding upon and shall inure to the benefit
        of the parties and their respective successors and assigns.  This
        Agreement may be canceled by either party upon giving written
        notice to the other, except that this Agreement shall,
        notwithstanding such notice, remain applicable to any
        Transactions then outstanding.

        15.  Governing Law

             This Agreement shall be governed by the laws of the
        Commonwealth of Massachusetts without giving effect to the
        conflict of law principles thereof.

        16.  No Waivers, Etc.

             No express or implied waiver of any Event of Default by
        either party shall constitute a waiver of any other Event of
        Default and no exercise of any remedy hereunder by any party
        shall constitute a wavier of its right to exercise any other
        remedy hereunder.  No modification or waiver of any provision of
        this Agreement and no consent by any party to a departure
        herefrom shall be effective unless and until such shall be in
        writing and duly executed by both of the parties hereto. 

        19.  Intent

             (a)  The parties recognize that each Transaction is a
        "repurchase agreement" as that term is defined in Section 101 of
        Title 11 of the United States Code, as amended (except insofar as
        the type of Securities subject to such Transaction or the term of
        such Transaction would render such definition inapplicable), and
        a "securities contract" as that term is defined in Section 741 of
        Title 11 of the United States Code, as amended.

             (b)  It is understood that either party's right to liquidate
        Securities delivered to it in connection with Transactions
        hereunder or to exercise any other remedies pursuant to Paragraph
        11 hereof, is a contractual right to liquidate such Transaction

                                        7PAGE
<PAGE>
        as described in Sections 555 and 559 of Title 11 of the United
        States Code, as amended.

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

        THERMO ELECTRON CORPORATION        THERMOTREX CORPORATION

        By:  /s/ Melissa F. Riordan        By:  /s/ Gary S. Weinstein
             Melissa F. Riordan                 Gary S. Weinstein
             Treasurer                          Chief Executive Officer



                                                        EXHIBIT 10.18
                             THERMOTREX CORPORATION

               TREX COMMUNICATIONS NONQUALIFIED STOCK OPTION PLAN

        1.   Purpose

             This Nonqualified Stock Option Plan (the "Plan") is intended
        to encourage  ownership of  Common Stock,  $0.01 par  value  (the
        "Common    Stock"),    of    Trex    Communications       Corporaton
        ("Subsidiary"),  a  subsidiary  of  ThermoTrex  Corporation  (the
        "Company"), by persons selected by  the Board of Directors (or  a
        committee thereof) in its  sole discretion, including  directors,
        executive officers, key employees and consultants of the  Company
        and its  subsidiaries, and  to provide  additional incentive  for
        them to promote the  success of the business  of the Company  and
        Subsidiary.   The Plan  is intended  to be  a nonstatutory  stock
        option plan.

        2.   Effective Date of the Plan

             The Plan shall become effective when adopted by the Board of
        Directors of the Company.

        3.   Stock Subject to Plan

             At no time shall  the number of shares  of the Common  Stock
        then outstanding  which  are  attributable  to  the  exercise  of
        options granted under  the Plan  plus the number  of shares  then
        issuable upon the exercise  of outstanding options granted  under
        the  Plan  exceed 50,000  shares, subject howeverm, to the
        provisions of paragraph 11 of the Plan.  Shares to be issued upon
        the exercise of options granted under the Plan shall be shares of
        Subsidiary beneficially  owned by  the Company.   If  any  option
        expires  or  terminates  for  any  reason  without  having   been
        exercised in full, the  unpurchased shares subject thereto  shall
        again be available for options thereafter to be granted.

        4.   Administration

             The  Plan  shall  be   administered  by  a  committee   (the
        "Committee") composed of the members of the Board of Directors of
        the Company,  no  member  of  which shall  act  upon  any  matter
        exclusively affecting  any option  granted or  to be  granted  to
        himself or herself under the Plan.  Subject to the provisions  of
        the Plan, the  Committee shall  have complete  authority, in  its
        discretion, to make the following determinations with respect  to
        each option to  be granted  by the Company:   (a)  the person  to
        receive the option (the "Optionee"); (b) the time of granting the
        option; (c) the number of shares subject thereto; (d) the  option
        price; (e) the option period; and (f) the terms of the option and
        form of option agreement (which need not be identical, but  which
        shall conform to the applicable terms and conditions of the  Plan
        and contain such other provisions as the Board of Directors deems
PAGE
<PAGE>
        advisable and not inconsistent  with the Plan).   In making  such
        determinations, the Committee may take into account the nature of
        the  services  rendered  by  the  Optionees,  their  present  and
        potential contributions to the success of the Company and/or  one
        or more  of  its subsidiaries,  and  such other  factors  as  the
        Committee in its discretion shall deem relevant.  Subject to  the
        provisions of the  Plan, the Committee  shall also have  complete
        authority to interpret the Plan, to prescribe, amend, and rescind
        rules and regulations relating to it, to determine the terms  and
        provisions of the respective option agreements (which need not be
        identical), and  to make  all other  determinations necessary  or
        advisable for the  administration of the  Plan.  The  Committee's
        determinations on the  matters referred  to in  this paragraph  4
        shall be conclusive.

        5.   Eligibility

             An option  may be  granted  to any  person selected  by  the
        Committee in its sole discretion.

        6.   Time of Granting Options

             The granting  of an  option  shall take  place at  the  time
        specified by the Committee.  Only if expressly so provided by the
        Committee shall the granting of  an option be regarded as  taking
        place at the time when a written option agreement shall have been
        duly executed and delivered  by or on behalf  of the Company  and
        the Optionee to whom such option shall be granted.  The agreement
        shall provide, among other things,  that it does not confer  upon
        an Optionee any right  to continue in the  employ of the  Company
        and/or one  or more  of  its subsidiaries  or  to continue  as  a
        director or  consultant of  the  Company, and  that it  does  not
        interfere in any way  with the right of  the Company or any  such
        subsidiary to terminate  the employment  of the  Optionee at  any
        time if the Optionee is an employee, to remove the Optionee as  a
        director of the  Company if  the Optionee  is a  director, or  to
        terminate the  services of  the  Optionee if  the Optionee  is  a
        consultant.

        7.   Option Period

             An option  may become  exercisable  immediately or  in  such
        installments, cumulative or noncumulative,  as the Committee  may
        determine.  

        8.   Exercise of Option

             An option may be exercised  in accordance with its terms  by
        written notice of intent to  exercise the option, specifying  the
        number of shares  of stock with  respect to which  the option  is
        then being exercised.  The notice shall be accompanied by payment
        in the form  of cash or  shares of Subsidiary  Common Stock  (the
        "Tendered Shares") with a then current market value equal to  the
        option price of  the shares to  be purchased; provided,  however,
PAGE
<PAGE>
        that such  Tendered  Shares  shall  have  been  acquired  by  the
        Optionee more  than six  months prior  to the  date of  exercise,
        unless such  requirement is  waived in  writing by  the  Company.
        Against such payment  the Company  shall deliver or  cause to  be
        delivered to the Optionee a certificate for the number of  shares
        then being purchased, registered in  the name of the Optionee  or
        other person exercising  the option.   If any  law or  applicable
        regulation of  the Securities  and Exchange  Commission or  other
        body having  jurisdiction  in  the  premises  shall  require  the
        Company, Subsidiary  or  the  Optionee  to  take  any  action  in
        connection with  shares  being  purchased upon  exercise  of  the
        option, exercise of the option and delivery of the certificate or
        certificates for such shares shall be postponed until  completion
        of the necessary action,  which shall be  taken at the  Company's
        expense.

        9.   Transferability

             Except as may be  authorized by the  Committee , in its sole
        discretion, no  Option   may be transferred other than by will or
        the laws of  descent and  distribution, and  during a  Optionee's
        lifetime an option    requiring exercise  may be exercised  only by
        him or her (or in the event of incapacity, the person or  persons
        properly appointed to act on his or her behalf). The Committee   
        may, in its  discretion, determine  the extent  to which  options
        granted to an Optionee shall be transferable, and such provisions
        permitting or acknowledging  transfer shall be  set forth in  the
        written agreement evidencing the option executed and delivered by
        or on behalf of the Company and the Optionee.

        10.  Vesting, Restrictions and Termination of Options

             The Committee,  in its  sole discretion,  may determine  the
        manner in which options shall vest, the rights of the Company  to
        repurchase the shares issued upon the exercise of any option  and
        the manner in which such rights  shall lapse, and the terms  upon
        which any option granted shall terminate.  The Board of Directors
        shall have the right  to accelerate the date  of exercise of  any
        installment  or  to  accelerate   the  lapse  of  the   Company's
        repurchase rights.   All of such  terms shall be  specified in  a
        written option agreement executed and  delivered by or on  behalf
        of the Company  and the  Optionee to  whom such  option shall  be
        granted.

        11.  Adjustment of Number of Shares

             Each stock option agreement shall provide that in the  event
        of any stock dividend payable in the Common Stock or any split-up
        or contraction  in  the number  of  shares of  the  Common  Stock
        occurring after  the  date of  the  agreement and  prior  to  the
        exercise in full of  the option, the number  of shares for  which
        the option may thereafter  be exercised shall be  proportionately
        adjusted and the price to be  paid for each share subject to  the
        option shall be  proportionately adjusted.   Each such  agreement
PAGE
<PAGE>
        shall also provide that in case of any reclassification or change
        of outstanding  shares of  the Common  Stock or  in case  of  any
        consolidation or  merger  of  Subsidiary  with  or  into  another
        company or in case of any  sale or conveyance to another  company
        or  entity  of  the  property   of  Subsidiary  as  a  whole   or
        substantially as a  whole, the Optionee  shall, upon exercise  of
        the option,  be entitled  to  receive shares  of stock  or  other
        securities in its  place equivalent  in kind and  value to  those
        shares which  he would  have  received if  he had  exercised  the
        option  in  full  immediately  prior  to  such  reclassification,
        change,  consolidation,  merger,  sale  or  conveyance  and   had
        continued to hold the shares subject to the option (together with
        all other  shares,  stock  and securities  thereafter  issued  in
        respect thereof)  to the  time  of the  exercise of  the  option;
        provided , that if any recapitalization is to be effected through
        an increase  in the  par value  of the  Common Stock  without  an
        increase in  the number  of authorized  shares and  such new  par
        value will  exceed the  option price  under such  agreement,  the
        Company   shall   notify   the   Optionee   of   such    proposed
        recapitalization, and  the Optionee  shall then  have the  right,
        exercisable at any time  prior to such recapitalization  becoming
        effective, to purchase all  of the shares  subject to the  option
        which  he  has  not  theretofore  purchased  (anything  in   such
        agreement to the contrary  notwithstanding), but if the  Optionee
        fails to exercise such right before such recapitalization becomes
        effective,  the  option  price  under  such  agreement  shall  be
        appropriately  adjusted.    Each  such  agreement  shall  further
        provide that upon dissolution  or liquidation of Subsidiary,  the
        option shall  terminate, but  the  Optionee (if  at the  time  an
        employee or director of the Company and/or any one or more of its
        subsidiaries) shall  have the  right, immediately  prior to  such
        dissolution or liquidation,  to exercise the  option to the  full
        extent not theretofore exercised; that no adjustment provided for
        above shall apply to any share  with respect to which the  option
        has  been  exercised  prior  to   the  effective  date  of   such
        adjustment; and that no fraction of a share or fractional  shares
        shall be purchasable or deliverable under such agreement, but  in
        the event  any  adjustment thereunder  of  the number  of  shares
        covered by  the  option shall  cause  such number  to  include  a
        fraction of  a share,  such  fraction shall  be adjusted  to  the
        nearest smaller whole number of shares.  In the event of  changes
        in the outstanding Common Stock by reason of any stock  dividend,
        split-up, contraction, reclassification, or change of outstanding
        shares of the  Common Stock  of the nature  contemplated by  this
        paragraph 11, the number of shares of Common Stock available  for
        the purpose of the Plan as stated in paragraph 3 hereof shall  be
        correspondingly adjusted by the Committee.

        12.  Limitation of Rights in Option Stock

             The Optionees  shall  have  no  rights  as  stockholders  in
        respect of shares as to which  their options shall not have  been
        exercised, certificates  issued  and  delivered  and  payment  as
PAGE
<PAGE>
        herein provided  made in  full,  and shall  have no  rights  with
        respect to such shares not expressly conferred by this Plan.

        13.  Stock Reserved

             The Company  shall  at all  times  during the  term  of  the
        options reserve and keep available  such number of shares of  the
        Common Stock as will be sufficient to satisfy the requirements of
        this Plan and shall pay  all other fees and expenses  necessarily
        incurred by the Company in connection therewith.

        14.  Securities Laws Restrictions

             Each Optionee exercising  an option, at  the request of  the
        Company, will  be  required  to give  a  representation  in  form
        satisfactory  to  counsel  for  the  Company  that  he  will  not
        transfer, sell or otherwise dispose  of the shares received  upon
        exercise of  the  option  at  any time  purchased  by  him,  upon
        exercise of any portion  of the option, in  a manner which  would
        violate  the  Securities  Act  of  1933,  as  amended,  and   the
        regulations of the Securities and Exchange Commission  thereunder
        and the Company  may, if required  or at its  discretion, make  a
        notation on any certificates issued  upon exercise of options  to
        the effect that  such certificate may  not be transferred  except
        after  receipt  by   the  Company  of   an  opinion  of   counsel
        satisfactory to  it to  the effect  that such  transfer will  not
        violate such Act and such regulations.

        15.  Tax Withholding

             The Company shall have the right to deduct from payments  of
        any kind otherwise due to an Optionee any federal, state or local
        taxes of any kind required by law to be withheld with respect  to
        any shares issued upon  exercise of options  under the Plan  (the
        "withholding requirements").  The  Committee will have the  right
        to require that the Optionee or other appropriate person remit to
        the Company  an  amount  sufficient to  satisfy  the  withholding
        requirements, or  make  other arrangements  satisfactory  to  the
        Committee with regard to such requirements, prior to the delivery
        of any Common Stock pursuant to exercise of an option.  If and to
        the extent that such withholding  is required, the Committee  may
        permit the Optionee or  such other person to  elect at such  time
        and in such manner as the Committee provides to have the  Company
        hold back from the shares to  be delivered, or to deliver to  the
        Company, Common Stock  having a value  calculated to satisfy  the
        withholding requirements.

        16.  Termination and Amendment of Plan

             The Board of  Directors may at  any time, and  from time  to
        time, modify or amend the Plan in any respect, except that if  at
        any time  the approval  of  the Stockholders  of the  Company  is
        required as to such modification  or amendment under Rule  16b-3,
PAGE
<PAGE>
        the Board  of  Directors  may not  effect  such  modification  or
        amendment without such approval.

             The termination or any modification or amendment of the Plan
        shall not, without the consent of an Optionee, affect his or  her
        rights under an option  previously granted to him  or her.   With
        the consent of the Optionees affected, the Board of Directors may
        amend outstanding option agreements in a manner not  inconsistent
        with the Plan.   The Board of Directors  shall have the right  to
        amend or modify the terms and  provisions of the Plan and of  any
        outstanding  option  to  the  extent  necessary  to  ensure   the
        qualification of the Plan under Rule 16b-3.

             Notwithstanding any other provisions hereof, the Plan  shall
        terminate on December 31,  2006 and no  options shall be  granted
        hereunder thereafter.


                                                        EXHIBIT 10.38
                             THERMOTREX CORPORATION
                     RESTATED STOCK HOLDING ASSISTANCE PLAN

        SECTION 1.   Purpose.

             The purpose of this Plan is to benefit ThermoTrex
        Corporation (the "Company") and its stockholders by encouraging
        Key Employees to acquire and maintain share ownership in the
        Company, by increasing such employees' proprietary interest in
        promoting the growth and performance of the Company and its
        subsidiaries and by providing for the implementation of the Stock
        Holding Policy.  

        SECTION 2.     Definitions.

             The following terms, when used in the Plan, shall have the
        meanings set forth below:

             Committee:   The Human Resources Committee of the Board of
        Directors of the Company as appointed from time to time.

             Common Stock:   The common stock of the Company and any
        successor thereto.

             Company:   ThermoTrex Corporation, a Delaware corporation.

             Stock Holding Policy:   The Stock Holding Policy of the
        Company, as adopted by the Committee and as in effect from time
        to time.

             Key Employee:   Any employee of the Company or any of its
        subsidiaries, including any officer or member of the Board of
        Directors who is also an employee, as designated by the
        Committee, and who, in the judgment of the Committee, will be in
        a position to contribute significantly to the attainment of the
        Company's strategic goals and long-term growth and prosperity.

             Loans:   Loans extended to Key Employees by the Company
        pursuant to this Plan.

             Plan:   The ThermoTrex Corporation Stock Holding Assistance
        Plan, as amended from time to time.

        SECTION 3.     Administration.

             The Plan and the Stock Holding Policy shall be administered
        by the Committee, which shall have authority to interpret the
        Plan and the Stock Holding Policy and, subject to their
        provisions, to prescribe, amend and rescind any rules and
        regulations and to make all other determinations necessary or
        desirable for the administration thereof.  The Committee's
        interpretations and decisions with regard to the Plan and the
PAGE
<PAGE>
        Stock Holding Policy and such rules and regulations as may be
        established thereunder shall be final and conclusive.  The
        Committee may correct any defect or supply any omission or
        reconcile any inconsistency in the Plan or the Stock Holding
        Policy, or in any Loan in the manner and to the extent the
        Committee deems desirable to carry it into effect.  No member of
        the Committee shall be liable for any action or omission in
        connection with the Plan or the Stock Holding Policy that is made
        in good faith.

        SECTION 4.     Loans and Loan Limits.

             The Committee has determined that the provision of Loans
        from time to time to Key Employees in such amounts as to cause
        such Key Employees to comply with the Stock Holding Policy is, in
        the judgment of the Committee, reasonably expected to benefit the
        Company and authorizes the Company to extend Loans from time to
        time to Key Employees in such amounts as may be requested by such
        Key Employees in order to comply with the Stock Holding Policy.
        Such Loans may be used solely for the purpose of acquiring Common
        Stock (other than upon the exercise of stock options or under
        employee stock purchase plans) in open market transactions or
        from the Company.

             Each Loan shall be full recourse and evidenced by a
        non-interest bearing promissory note substantially in the form
        attached hereto as Exhibit A (the "Note") and maturing in
        accordance with the provisions of Section 6 hereof, and
        containing such other terms and conditions, which are not
        inconsistent with the provisions of the Plan and the Stock
        Holding Policy, as the Committee shall determine in its sole and
        absolute discretion.

        SECTION 5.     Federal Income Tax Treatment of Loans.

             For federal income tax purposes, interest on Loans shall be
        imputed on any interest free Loan extended under the Plan.  A Key
        Employee shall be deemed to have paid the imputed interest to the
        Company and the Company shall be deemed to have paid said imputed
        interest back to the Key Employee as additional compensation.
        The deemed interest payment shall be taxable to the Company as
        income, and may be deductible to the Key Employee to the extent
        allowable under the rules relating to investment interest.  The
        deemed compensation payment to the Key Employee shall be taxable
        to the employee and deductible to the Company, but shall also be
        subject to employment taxes such as FICA and FUTA.

        SECTION 6.     Maturity of Loans.

             Each Loan to a Key Employee hereunder shall be due and
        payable on demand by the Company.  If no such demand is made,
        then each Loan shall mature and the principal thereof shall
        become due and payable on the fifth anniversary of the date of
        the Loan, provided that the Committee may, in its sole and
PAGE
<PAGE>
        absolute discretion, authorize such other maturity and repayment
        schedule as the Committee may determine.  Each Loan shall also
        become immediately due and payable in full, without demand, upon
         the occurrence of any of the events set forth in the Note;
        provided that the Committee may, in its sole and absolute
        discretion, authorize an extension of the time for repayment of a
        Loan upon such terms and conditions as the Committee may
        determine.

        SECTION 7.     Amendment and Termination of the Plan.

             The Committee may from time to time alter or amend the Plan
        or the Stock Holding Policy in any respect, or terminate the Plan
        or the Stock Holding Policy at any time.  No such amendment or
        termination, however, shall alter or otherwise affect the terms
        and conditions of any Loan then outstanding to Key Employee
        without such Key Employee's written consent, except as otherwise
        provided herein or in the promissory note evidencing such Loan.

        SECTION 8.     Miscellaneous Provisions.

             (a)  No employee or other person shall have any claim or
        right to receive a Loan under the Plan, and no employee shall
        have any right to be retained in the employ of the Company due to
        his or her participation in the Plan.

             (b)  No Loan shall be made hereunder unless counsel for the
        Company shall be satisfied that such Loan will be in compliance
        with applicable federal, state and local laws.

             (c)  The expenses of the Plan shall be borne by the Company.

             (d)  The Plan shall be unfunded, and the Company shall not
        be required to establish any special or separate fund or to make
        any other segregation of assets to assure the making of any Loan
        under the Plan.

             (e)  Except as otherwise provided in Section 7 hereof, by
        accepting any Loan under the Plan, each Key Employee shall be
        conclusively deemed to have indicated his acceptance and
        ratification of, and consent to, any action taken under the Plan
        or the Stock Holding Policy by the Company, the Board of
        Directors of the Company or the Committee.

             (f)  The appropriate officers of the Company shall cause to
        be filed any reports, returns or other information regarding
        Loans hereunder, as may be required by any applicable statute,
        rule or regulation.

        SECTION 9.     Effective Date.

             The Plan and the Stock Holding Policy shall become effective
        upon approval and adoption by the Committee.
PAGE
<PAGE>
                               EXHIBIT A TO STOCK HOLDING ASSISTANCE PLAN

                             THERMOTREX CORPORATION

                                 Promissory Note

        $_________                                                       
                                                Dated:____________

             For value  received, ________________,  an individual  whose
        residence is located at _______________________ (the "Employee"),
        hereby promises to pay to ThermoTrex Corporation (the "Company"),
        or assigns, ON DEMAND, but in any case on or before [insert  date
        which  is  the  fifth  anniversary  of  date  of  issuance]  (the
        "Maturity Date"), the  principal sum  of [loan  amount in  words]
        ($_______), or such part thereof as then remains unpaid,  without
        interest.   Principal shall  be payable  in lawful  money of  the
        United States of America, in immediately available funds, at  the
        principal office of  the Company or  at such other  place as  the
        Company may  designate  from  time  to time  in  writing  to  the
        Employee. 

             Unless the Company has already made a demand for payment  in
        full of this Note,  the Employee agrees to  repay to the  Company
        from the Employee's annual cash incentive compensation  (referred
        to as  bonus), beginning  with the  first such  bonus payment  to
        occur after the date of  this Note and on  each of the next  four
        bonus payment dates  occurring prior to  the Maturity Date,  such
        amount as may be  designated by the Company  but which shall  not
        exceed 20% of the Employee's bonus payment. Any amount  remaining
        unpaid under  this  Note, if  no  demand  has been  made  by  the
        Company, shall be due and payable on the Maturity Date.

             This Note may be prepaid at  any time or from time to  time,
        in whole  or  in part,  without  any  premium or  penalty.    The
        Employee acknowledges and agrees that the Company has advanced to
        the Employee the principal  amount of this  Note pursuant to  the
        Company's Stock Holding Assistance Plan,  and that all terms  and
        conditions of such Plan are incorporated herein by reference.  

             The unpaid principal amount of this Note shall be and become
        immediately due  and payable  without notice  or demand,  at  the
        option of  the  Company,  upon  the  occurrence  of  any  of  the
        following events:

                  (a)  the termination of the Employee's employment  with
             the Company, with or without cause, for any reason or for no
             reason;

                  (b)  the death or disability of the Employee;
PAGE
<PAGE>
                  (c)  the failure  of the  Employee to  pay his  or  her
             debts as they  become due, the  insolvency of the  Employee,
             the filing by or against the Employee of any petition  under
             the United  States Bankruptcy  Code (or  the filing  of  any
             similar  petition   under   the  insolvency   law   of   any
             jurisdiction),  or  the  making   by  the  Employee  of   an
             assignment or trust mortgage for the benefit of creditors or
             the appointment of  a receiver, custodian  or similar  agent
             with respect  to,  or  the  taking by  any  such  person  of
             possession of, any property of the Employee; or

                  (d)  the issuance of any writ of attachment, by trustee
             process or otherwise, or any restraining order or injunction
             not removed, repealed or  dismissed within thirty (30)  days
             of issuance, against or affecting the person or property  of
             the Employee or any liability or obligation of the  Employee
             to the Company.

             In case any payment  herein provided for  shall not be  paid
        when due,  the Employee  further  promises to  pay all  costs  of
        collection, including all reasonable attorneys' fees.

             No  delay  or  omission  on  the  part  of  the  Company  in
        exercising any right hereunder shall operate as a waiver of  such
        right or of any other right of the Company, nor shall any  delay,
        omission or waiver  on any  one occasion be  deemed a  bar to  or
        waiver of the  same or any  other right on  any future  occasion.
        The  Employee  hereby  waives  presentment,  demand,  notice   of
        prepayment,  protest  and  all  other  demands  and  notices   in
        connection with the delivery, acceptance, performance, default or
        enforcement of this Note.  The undersigned hereby assents to  any
        indulgence  and  any  extension  of  time  for  payment  of   any
        indebtedness  evidenced  hereby  granted  or  permitted  by   the
        Company.  

             This Note  has been  made pursuant  to the  Company's  Stock
        Holding Assistance Plan and shall be governed by and construed in
        accordance with, such Plan and the laws of the State of  Delaware
        and shall have the effect of a sealed instrument.

                                      _______________________________

                                      Employee Name: _________________


        ________________________
        Witness


                                                                    Exhibit 11

                             THERMOTREX CORPORATION

                        Computation of Earnings per Share

                                                                     Nine
                                        Year Ended               Months Ended
                            -----------------------------------  ------------
                            Sept. 27,    Sept. 28,    Sept. 30,     Sept. 30,
                                 1997         1996         1995          1995
   --------------------------------------------------------------------------
                                                     (Unaudited)
   Computation of Primary
     Earnings per Share:

   Net Income (a)         $ 8,441,000  $42,575,000  $36,658,000   $36,341,000
                          -----------  -----------  -----------   -----------
   Shares:
     Weighted average
       shares outstanding  19,209,613   19,074,734   18,913,286    18,938,215

     Add: Shares issuable
          from assumed
          exercise of 
          options (as 
          determined by
          the application
          of the treasury
          stock method)             -      593,822            -             -
                          -----------  -----------  -----------   -----------
     Weighted average
       shares outstanding,
       as adjusted (b)     19,209,613   19,668,556   18,913,286    18,938,215
                          -----------  -----------  -----------   -----------
   Primary Earnings
     per Share (a) / (b)  $       .44  $      2.16  $      1.94   $      1.92
                          ===========  ===========  ===========   ===========


                                                                   Exhibit 13











                             ThermoTrex Corporation

                        Consolidated Financial Statements

                                Fiscal Year 1997
PAGE
<PAGE>
   ThermoTrex Corporation                            1997 Financial Statements

                        Consolidated Statement of Income
                                                                Nine Months
                                        Year Ended                 Ended
                               --------------------------------  ----------
  (In thousands except          Sept. 27,  Sept. 28,  Sept. 30,   Sept. 30,
  per share amounts)                 1997       1996       1995        1995
  -------------------------------------------------------------------------
                                                     (Unaudited)
  Revenues (Notes 7 and 13):
    Product and service revenues $265,947   $169,669   $ 93,503    $ 72,485
    Contract revenues              16,174     12,360     18,107      14,046
                                 --------   --------   --------    --------
                                  282,121    182,029    111,610      86,531
                                 --------   --------   --------    --------
  Costs and Operating Expenses:
    Cost of product and service
      revenues                    168,469    101,967     50,809      39,426
    Cost of contract revenues      11,667     10,278     14,750      11,803
    Selling, general, and admin-
      istrative expenses (Note 7)  69,043     41,283     27,318      21,145
    Research and development
      expenses                     32,067     24,986     17,964      13,430
    Write-off of acquired
      technology (Note 3)           1,400          -          -           -
    Costs associated with
      divisional restructuring
      (Note 11)                         -          -        968         968
                                 --------   --------   --------    --------
                                  282,646    178,514    111,809      86,772
                                 --------   --------   --------    --------

  Operating Income (Loss)            (525)     3,515       (199)       (241)
  Interest Income                   4,752      5,977      4,226       3,223
  Interest Expense (includes
    $197 in 1997 and $464 in
    1996 to parent company)          (835)      (464)        (6)         (6)
  Gain on Issuance of Stock by
    Subsidiaries (Note 10)          7,926     39,149     34,721      34,721
  Gain on Sale of Investments           -        115        153         194
  Equity in Losses of Joint
    Ventures (Note 3)                (700)         -          -           -
                                 --------   --------   --------    --------
  Income Before Provision for
    Income Taxes and Minority
    Interest                       10,618     48,292     38,895      37,891
  Provision for Income Taxes
    (Note 6)                        3,474      5,341      2,802       2,115
  Minority Interest (Income)
    Expense                        (1,297)       376       (565)       (565)
                                 --------   --------   --------    --------
  Net Income                     $  8,441   $ 42,575   $ 36,658    $ 36,341
                                 ========   ========   ========    ========

  Earnings per Share             $    .44   $   2.16   $   1.94    $   1.92
                                 ========   ========   ========    ========

  Weighted Average Shares          19,210     19,669     18,913      18,938
                                 ========   ========   ========    ========

  The accompanying notes are an integral part of these consolidated financial
  statements.
                                        2PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                           Consolidated Balance Sheet

                                                 Sept. 27,     Sept. 28,
    (In thousands)                                    1997          1996
    --------------------------------------------------------------------
    Assets
    Current Assets:
      Cash and cash equivalents                   $135,720      $ 43,940
      Available-for-sale investments, at
        quoted market value (amortized cost
        of $17,520 and $51,774; Note 2)             17,499        51,701
      Accounts receivable, less allowances
        of $1,969 and $1,586                        58,632        36,615
      Unbilled contract costs and fees               4,651         2,933
      Inventories                                   48,204        37,303
      Prepaid expenses                               3,422         2,157
      Prepaid income taxes (Note 6)                 11,877         9,685
                                                  --------      --------
                                                   280,005       184,334
                                                  --------      --------
    Property, Plant, and Equipment, at 
      Cost, Net                                     52,389        31,504
                                                  --------      --------
    Notes Receivable from Related Party 
      (Note 7)                                       3,300         3,300
                                                  --------      --------
    Prepaid Income Taxes and Other Assets 
      (Note 6)                                      13,831         4,680
                                                  --------      --------
    Cost in Excess of Net Assets of Acquired
      Companies (Note 3)                           100,592        96,404
                                                  --------      --------
                                                  $450,117      $320,222
                                                  ========      ========

                                        3PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                     Consolidated Balance Sheet (continued)

                                                    Sept. 27,      Sept. 28,
    (In thousands except share amounts)                  1997           1996
    ------------------------------------------------------------------------
    Liabilities and Shareholders' Investment
    Current Liabilities:
      Note payable to parent company (Note 7)        $ 11,000       $  2,000
      Accounts payable                                 21,373         19,569
      Accrued payroll and employee benefits             8,863          7,228
      Accrued warranty costs                            6,299          5,379
      Customer deposits                                 3,795          3,582
      Accrued commissions                               3,922          2,049
      Other accrued expenses (Note 3)                  20,450         15,395
      Due to parent company and affiliated
        companies                                       2,027          1,269
                                                     --------       --------
                                                       77,729         56,471
                                                     --------       --------
    4 3/8% Subordinated Convertible Debentures
      (Note 8)                                        115,000              -
                                                     --------       --------
    Deferred Lease Liability                            1,379            494
                                                     --------       --------
    Common Stock of Subsidiary Subject to
      Redemption (Note 1)                              40,500              -
                                                     --------       --------
    Minority Interest                                  39,374         58,178
                                                     --------       --------
   Commitments and Contingencies
      (Notes 3, 7, 9, and 15)

    Shareholders' Investment (Notes 4 and 5):
      Common stock, $.01 par value, 50,000,000
        shares authorized; 19,251,769 and 
        19,190,107 shares issued                          193            192
      Capital in excess of par value                   78,601        116,753
      Retained earnings                                97,597         89,156
      Treasury stock at cost, 8,747 and 25,508
        shares                                           (243)          (975)
      Net unrealized loss on available-for-sale
        investments (Note 2)                              (13)           (47)
                                                     --------       --------
                                                      176,135        205,079
                                                     --------       --------
                                                     $450,117       $320,222
                                                     ========       ========


    The accompanying notes are an integral part of these consolidated
    financial statements.

                                        4PAGE
<PAGE>
  ThermoTrex Corporation                              1997 Financial Statements

                      Consolidated Statement of Cash Flows
                                                                 Nine Months
                                          Year Ended                Ended
                              ------------------------------     -----------
                              Sept. 27,   Sept. 28,    Sept. 30,   Sept. 30,
   (In thousands)                  1997        1996         1995        1995
   -------------------------------------------------------------------------
                                                      (Unaudited)
   Operating Activities:
     Net income                $  8,441    $ 42,575    $ 36,658    $ 36,341
     Adjustments to reconcile
       net income to net cash
       provided by (used in) 
       operating activities:
         Depreciation and
           amortization           9,280       4,902       2,983       2,288
         Provision for losses
           on accounts
           receivable               279         336         185         178
         Write-off of acquired
           technology (Note 3)    1,400           -           -           -
         Costs associated
           with divisional
           restructuring
           (Note 11)                  -           -         968         968
         Gain on issuance of
           stock by subsidiaries
           (Note 10)             (7,926)    (39,149)    (34,721)    (34,721)
         Gain on sale of
           investments                -        (115)       (153)       (194)
         Minority interest
           (income) expense      (1,297)        376        (565)       (565)
         Increase in long-term 
           prepaid income taxes  (4,308)          -           -           -
         Other (Note 3)           1,624         494         162         162
         Changes in current
           accounts, excluding
           the effects of
           acquisitions:
             Accounts receivable (19,694)    (2,790)     (8,598)     (6,745)
             Inventories and
               unbilled contract
               costs and fees   (11,290)     (1,176)     (3,721)     (1,456)
             Other current
               assets            (3,311)     (2,734)      1,061        (454)
             Accounts payable     1,522       1,254       6,454       3,523
             Other current 
               liabilities       11,208       1,688       2,620       2,767
                               --------    --------    --------    --------
   Net cash provided by 
     (used in) operating 
     activities                $(14,072)   $  5,661    $  3,333    $  2,092
                               --------    --------    --------    --------

                                        5PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                Consolidated Statement of Cash Flows (continued)

                                                                 Nine Months
                                          Year Ended                Ended
                              ---------------------------------- -----------
                              Sept. 27,   Sept. 28,    Sept. 30,   Sept. 30,
    (In thousands)                 1997        1996         1995        1995
    ------------------------------------------------------------------------
                                                      (Unaudited)
    Investing Activities:
      Acquisitions, net of
        cash acquired (Note 3) $(10,712)   $(36,888)   $(42,199)    $(42,002)
      Proceeds from sale of
        businesses to related
        parties (Note 7)              -         860           -            -
      Purchases of available-
        for-sale investments    (10,400)    (52,000)    (50,061)     (49,793)
      Proceeds from sale and
        maturities of
        available-for-sale 
        investments              44,000      65,230      34,836       18,462
      Purchases of property,
        plant, and equipment    (26,853)    (14,462)     (4,684)      (2,603)
      Payment to dissenting
        shareholders in
        connection with 1992
        Lorad acquisition
        (Note 3)                      -         -        (2,300)      (2,300)
      Issuance of notes
        receivable to related
        party (Note 7)                -      (1,300)     (2,000)      (2,000)
      Investment in other
        assets (Note 1)          (1,200)     (4,400)          -            -
      Other                           -         301          32            -
                                -------    --------    --------     --------

    Net cash used in
      investing activities      $(5,165)   $(42,659)   $(66,376)    $(80,236)
                                -------    --------    --------     --------

                                        6PAGE
<PAGE>
   ThermoTrex Corporation                            1997 Financial Statements

                Consolidated Statement of Cash Flows (continued)

                                                                  Nine Months
                                            Year Ended               Ended
                                --------------------------------- -----------
                                Sept. 27,  Sept. 28,   Sept. 30,    Sept. 30,
   (In thousands)                    1997       1996        1995         1995
   --------------------------------------------------------------------------
                                                      (Unaudited)
   Financing Activities:
     Net proceeds from
       issuance of 
       subordinated 
       convertible 
       debentures (Note 8)       $112,551   $      -   $      -     $      -
     Net proceeds from
       issuance of Company
       and subsidiaries'
       common stock and sale
       of subsidiary put
       options (Notes 5
       and 10)                     16,370     71,873     56,162       56,108
     Net proceeds from 
       subsidiary stock
       exchange offer (Note 1)        502          -          -            -
     Purchases of subsidiary
       common stock               (26,072)         -          -            -
     Proceeds from issuance
       of notes payable to
       parent company (Note 7)     11,000      2,000      8,000        8,000
     Repayment of notes
       payable to parent
       company (Note 7)            (2,000)    (8,000)         -            -
     Payment of withholding
       taxes related to stock
       option exercises            (1,334)    (6,447)    (2,180)      (1,755)
                                 --------   --------   --------     --------
   Net cash provided by
     financing activities         111,017     59,426     61,982       62,353
                                 --------   --------   --------     --------
   Increase (Decrease) in
     Cash and Cash
     Equivalents                   91,780     22,428     (1,061)     (15,791)
   Cash and Cash Equivalents
     at Beginning of Period        43,940     21,512     22,573       37,303
                                 --------   --------   --------     --------
   Cash and Cash Equivalents
     at End of Period            $135,720   $ 43,940   $ 21,512     $ 21,512
                                 ========   ========   ========     ========

   Cash Paid For:
     Interest                    $    197   $    464   $      6     $      6
     Income taxes                $  6,622   $  3,106   $  2,292     $  2,058

                                        7PAGE
<PAGE>
   ThermoTrex Corporation                            1997 Financial Statements

                Consolidated Statement of Cash Flows (continued)

                                                                  Nine Months
                                            Year Ended               Ended
                                --------------------------------- -----------
                                Sept. 27,  Sept. 28,   Sept. 30,    Sept. 30,
   (In thousands)                    1997       1996        1995         1995
   --------------------------------------------------------------------------
                                                      (Unaudited)
   Noncash Activities:
     Fair value of assets of
       acquired companies        $ 14,677   $ 53,519   $ 50,419     $ 49,940
     Cash paid for acquired
       companies                  (11,150)   (38,178)   (42,199)     (42,002)
                                 --------   --------   --------     --------
       Liabilities assumed of
         acquired companies      $  3,527   $ 15,341   $  8,220     $  7,938
                                 ========   ========   ========     ========
     Exchange of subsidiary
       common stock for common
       stock of subsidiary
       subject to redemption
       (Note 1)                  $ 40,500   $      -   $      -     $      -
                                 ========   ========   ========     ========


   The accompanying notes are an integral part of these consolidated financial
   statements.


                                        8PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

               Consolidated Statement of Shareholders' Investment

                                                                 Nine Months
                                                Year Ended           Ended
                                            -------------------- -----------
                                            Sept. 27,  Sept. 28,   Sept. 30,
    (In thousands)                               1997       1996        1995
    ------------------------------------------------------------------------
    Common Stock, $.01 Par Value
      Balance at beginning of period        $    192     $   191     $   189
      Issuance of stock under employees'
        and directors' stock plans                 1           1           2
                                            --------    --------     -------
      Balance at end of period                   193         192         191
                                            --------    --------     -------
    Capital in Excess of Par Value
      Balance at beginning of period         116,753     116,837     113,911
      Activity under employees' and
        directors' stock plans                  (103)       (424)      1,188
      Tax benefit related to employees'
        and directors' stock plans             3,017       2,494       2,217
      Effect of majority-owned subsidiaries'
        equity transactions (Note 1)         (41,066)     (2,154)       (479)
                                            --------    --------    --------
      Balance at end of period                78,601     116,753     116,837
                                            --------    --------    --------
    Retained Earnings
      Balance at beginning of period          89,156      46,581      10,240
      Net income                               8,441      42,575      36,341
                                            --------    --------    --------
      Balance at end of period                97,597      89,156      46,581
                                            --------    --------    --------
    Treasury Stock
      Balance at beginning of period            (975)     (1,206)       (678)
      Activity under employees' and
        directors' stock plans                   732         231        (528)
                                            --------    --------    --------
      Balance at end of period                  (243)       (975)     (1,206)
                                            --------    --------    --------
    Net Unrealized Loss on Available-for-Sale
      Investments
      Balance at beginning of period             (47)        (15)       (391)
      Change in net unrealized loss on 
        available-for-sale investments            34         (32)        376
                                            --------    --------    --------
      Balance at end of period                   (13)        (47)        (15)
                                            --------    --------    --------
    Total Shareholders' Investment          $176,135    $205,079    $162,388
                                            ========    ========    ========


    The accompanying notes are an integral part of these consolidated
    financial statements.

                                        9PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    1.  Nature of Operations and Summary of Significant Accounting Policies

    Nature of Operations
        ThermoTrex Corporation (the Company) develops and markets medical
    products and personal-care products and services, and also performs
    advanced technology research. The Company's 79%-owned Trex Medical
    Corporation (Trex Medical) subsidiary designs, manufactures, and markets
    mammography equipment and minimally invasive digital breast-biopsy
    systems used for the detection of breast cancer, general-purpose X-ray
    equipment, and specialized X-ray equipment, including imaging systems
    used during diagnostic and interventional vascular and cardiac procedures
    such as balloon angioplasty. The Company's 67%-owned ThermoLase
    Corporation (ThermoLase) subsidiary has developed a laser-based system
    called SoftLight(SM) for the removal of unwanted hair, and also markets
    skin-care, bath, and body products through its wholly owned CBI
    Laboratories, Inc. (CBI) subsidiary. ThermoTrex's 78%-owned Trex
    Communications Corporation (Trex Communications) subsidiary has developed
    a laser communications technology and, through its Computer
    Communications Specialists, Inc. (CCS) subsidiary, designs and markets
    interactive information and voice-response systems, as well as call-
    automation systems. In addition, the Company performs advanced technology
    research primarily in the areas of avionics, X-ray detection, signal
    processing, and lasers. The Company has developed its expertise in these
    core technologies in connection with government-sponsored research and
    development.

    Relationship with Thermo Electron Corporation
        The Company was incorporated in January 1991 as a wholly owned
    subsidiary of Thermo Electron Corporation (Thermo Electron). As of
    September 27, 1997, Thermo Electron owned 10,149,556 shares of the
    Company's common stock, representing 53% of such stock outstanding.

    Principles of Consolidation
        The accompanying financial statements include the accounts of the
    Company, its wholly owned subsidiary, its majority-owned, privately held
    Trex Communications subsidiary, and its publicly held ThermoLase and Trex
    Medical subsidiaries. All material intercompany accounts and transactions
    have been eliminated.

    Fiscal Year
        In September 1995, the Company changed its fiscal year end from the
    Saturday nearest December 31 to the Saturday nearest September 30.
    Accordingly, the Company's transition period, which ended on September
    30, 1995, was the 39-week period from January 1, 1995, to September 30,
    1995, referenced as fiscal 1995. References to fiscal 1997 and fiscal
    1996 are for the years ended September 27, 1997, and September 28, 1996,
    respectively. Fiscal 1997 and fiscal 1996 each included 52 weeks. The
    unaudited consolidated statements of income and cash flows for the
    52-week period ended September 30, 1995, are presented for comparative
    purposes only.
     
                                       10PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    1.  Nature of Operations and Summary of Significant Accounting Policies 
        (continued)

    Revenue Recognition
        The Company recognizes product revenues upon shipment of its
    products. The Company provides a reserve for its estimate of warranty
    costs at the time of shipment. ThermoLase offers a variety of treatment
    plans for its spa-based hair-removal services which include one-time
    services and multiple treatment plans that provide for varying numbers of
    treatments or treatment periods. ThermoLase recognizes revenue from the
    one-time treatment plan upon performance of the related service. Revenues
    from multiple treatment plans are recognized over the anticipated
    treatment period, which, in fiscal 1997 and 1996, was six months based
    upon the average service pattern for customers treated during those
    years. ThermoLase earns an initial technology licensing fee and ongoing
    royalties from licensing its SoftLight technology to a network of
    independent physicians. Initial nonrefundable technology license fees are
    recorded as revenue at the time the technology is transferred to the
    practitioner. Fees arising from hair-removal procedures performed by
    these physicians are recognized when such procedures are performed.
    ThermoLase earns nonrefundable initial and ongoing technology licensing
    fees from its international arrangements. Initial nonrefundable
    technology license fees are recorded as revenue at the time the
    technology is transferred. Ongoing licensing fees are recorded when
    earned in accordance with contractual terms. The accompanying statement
    of income includes international licensing fees of $4,195,000 and
    $2,000,000 in fiscal 1997 and fiscal 1996, respectively.
        The Company recognizes contract revenues and profits using the
    percentage-of-completion method. The percentage of completion is
    determined by relating the actual costs incurred to date to management's
    estimate of total costs to be incurred on each contract. If a loss is
    indicated on any contract in process, a provision is made currently for
    the entire loss. The Company's contracts are generally cost-plus-fixed-
    fee, and customers are billed monthly as costs are incurred. Revenues
    earned on contracts in process in excess of billings are classified as
    "Unbilled contract costs and fees" in the accompanying balance sheet.
    There are no significant amounts included in the accompanying balance
    sheet that are not expected to be recovered from existing contracts at
    current contract values, or that are not expected to be collected within
    one year.

    Research and Development Expenses
        Costs classified as research and development expenses in the
    accompanying statement of income are costs incurred in connection with
    internally funded programs, including independent research and
    development as defined by U.S. government procurement regulations.
    Included in cost of contract revenues in the accompanying statement of
    income are research and development costs incurred under U.S. government-
    funded contracts. 

                                       11PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    1.  Nature of Operations and Summary of Significant Accounting Policies
        (continued)

    Gain on Issuance of Stock by Subsidiaries
        At the time a subsidiary sells its stock to unrelated parties at a
    price in excess of its book value, the Company's net investment in that
    subsidiary increases. If at that time the subsidiary is an operating
    entity and not engaged principally in research and development, the
    Company records the increase as a gain. See Note 10 for a description of
    gains recorded.
        If gains have been recognized on the issuance of a subsidiary's stock
    and shares of the subsidiary are subsequently repurchased either by the
    subsidiary, the Company, or Thermo Electron, gain recognition does not
    occur on issuances subsequent to the date of a repurchase until such time
    as shares have been issued in an amount equivalent to the number of
    repurchased shares.

    Concentration of Credit Risk
        Trex Medical sells its products primarily to customers in the
    healthcare industry. Trex Medical does not normally require collateral or
    other security to support its accounts receivable. Management does not
    believe that this concentration of credit risk has, or will have, a
    significant negative impact on the Company.

    Stock-based Compensation Plans
        The Company applies Accounting Principles Board Opinion (APB) No. 25,
    "Accounting for Stock Issued to Employees," and related interpretations
    in accounting for its stock-based compensation plans (Note 5).
    Accordingly, no accounting recognition is given to stock options granted
    at fair market value until they are exercised. Upon exercise, net
    proceeds, including tax benefits realized, are credited to equity.

    Income Taxes
        In accordance with Statement of Financial Accounting Standards (SFAS)
    No. 109, "Accounting for Income Taxes," the Company recognizes deferred
    income taxes based on the expected future tax consequences of differences
    between the financial statement basis and the tax basis of assets and
    liabilities calculated using enacted tax rates in effect for the year in
    which the differences are expected to be reflected in the tax return.

    Earnings per Share
        Earnings per share have been computed based on the weighted average
    number of shares outstanding during the period. In fiscal 1996, weighted
    average shares included the effect of the assumed exercise of stock
    options that were computed using the treasury stock method. During fiscal
    1997 and 1995, the effect of the assumed exercise of stock options was
    not material.

                                       12PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    1.  Nature of Operations and Summary of Significant Accounting Policies
        (continued)

    Cash and Cash Equivalents
        As of September 27, 1997, $91,164,000 of the Company's cash
    equivalents were invested in a repurchase agreement with Thermo Electron.
    Under this agreement, the Company in effect lends excess cash to Thermo
    Electron, which Thermo Electron collateralizes with investments
    principally consisting of U.S. government-agency securities, corporate
    notes, commercial paper, money market funds, and other marketable
    securities, in the amount of at least 103% of such obligation. The
    Company's funds subject to the repurchase agreement are readily
    convertible into cash by the Company. 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. In addition, cash
    equivalents as of September 27, 1997, include government-agency
    securities purchased with an original maturity of three months or less.
    These investments are carried at cost, which approximates market value.

    Available-for-sale Investments
        Pursuant to SFAS No. 115, "Accounting for Certain Investments in Debt
    and Equity Securities," the Company's debt and marketable equity
    securities are accounted for at market value (Note 2).

    Inventories
        Inventories are stated at the lower of cost (on a first-in, first-out
    basis) or market value and include materials, labor, and manufacturing
    overhead. The components of inventories are as follows:

    (In thousands)                                           1997       1996
    ------------------------------------------------------------------------
    Raw materials and supplies                           $27,860     $22,046
    Work in process                                       13,474       9,731
    Finished goods                                         6,870       5,526
                                                         -------     -------
                                                         $48,204     $37,303
                                                         =======     =======

    Property, Plant, and Equipment
        The costs of additions and improvements are capitalized, while
    maintenance and repairs are charged to expense as incurred. The Company
    provides for depreciation and amortization principally using the
    straight-line method over the estimated useful lives of the property as
    follows: buildings - 29 to 31.5 years, machinery and equipment - 3 to 10
    years, and leasehold improvements - the shorter of the term of the lease
    or the life of the asset. 

                                       13PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    1.  Nature of Operations and Summary of Significant Accounting Policies
        (continued)

    Property, plant, and equipment consists of the following:

    (In thousands)                                           1997       1996
    ------------------------------------------------------------------------
    Land and building                                     $ 5,014    $ 4,982
    Machinery and equipment                                40,806     24,918
    Leasehold improvements                                 21,992      9,040
    Construction in process                                   145      1,595
                                                          -------    -------
                                                           67,957     40,535
    Less: Accumulated depreciation and amortization        15,568      9,031
                                                          -------    -------
                                                          $52,389    $31,504
                                                          =======    =======

    Other Assets
        In June 1996, ThermoLase purchased $4,400,000 of convertible
    preferred stock of AntiCancer Incorporated (AntiCancer), representing an
    approximate 10% equity interest in AntiCancer on a fully diluted basis.
    AntiCancer is a San Diego-based company that is developing a new
    chemotherapeutic drug for cancer patients, and that is also developing
    certain technologies that may be relevant to ThermoLase's SoftLight 
    hair-removal process and other personal-care applications. ThermoLase has
    the option to purchase for $2,500,000 an additional 5% equity interest in
    AntiCancer on a fully diluted basis, exercisable at any time before the
    earlier of June 19, 2011, or AntiCancer's initial public offering of
    stock. This investment is being accounted for under the cost method of
    accounting. In addition, ThermoLase has licensed certain technology from
    AntiCancer (Note 9).

    Cost in Excess of Net Assets of Acquired Companies
        The excess of cost over the fair value of net assets of acquired
    companies is amortized using the straight-line method principally over
    40 years. Accumulated amortization was $8,167,000 and $5,434,000 at
    year-end 1997 and 1996, respectively. The Company assesses the future
    useful life of this asset whenever events or changes in circumstances
    indicate that the current useful life has diminished. The Company
    considers the future undiscounted cash flows of the acquired businesses
    in assessing the recoverability of this asset. If impairment has
    occurred, any excess of carrying value over fair value is recorded as a
    loss.

    Deferred Lease Liability
        Deferred lease liability in the accompanying balance sheet represents
    facilities rent that is being recognized ratably over the respective
    lease terms.

                                       14PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    1.  Nature of Operations and Summary of Significant Accounting Policies
        (continued)

    Common Stock of Subsidiary Subject to Redemption
        On April 2, 1997, ThermoLase completed an exchange offer whereby its
    shareholders had the opportunity to exchange one share of existing
    ThermoLase common stock and $3.00 (in cash or ThermoLase common stock)
    for a new unit consisting of one share of ThermoLase common stock and one
    redemption right. The redemption right entitles the holder to sell the
    related share of common stock to ThermoLase for $20.25 during the period
    from April 3, 2001, through April 30, 2001. The redemption right will
    expire and become worthless if the closing price of ThermoLase common
    stock is at least $26.00 for 20 of any 30 consecutive trading days. The
    redemption rights are guaranteed on a subordinated basis by Thermo
    Electron. The Company and Thermo Electron are parties to a Master
    Reimbursement Agreement whereby the Company would be required to
    reimburse Thermo Electron for any and all payments made by Thermo
    Electron under the guarantee. In connection with this offer, ThermoLase
    issued in April 1997, 2,000,000 units in exchange for 2,261,706 shares of
    its common stock and $502,000 in cash, net of expenses. As a result of
    these transactions, $40,500,000 was reclassified from "Shareholders'
    investment" and "Minority interest" to "Common stock of subsidiary
    subject to redemption," based on the issuance of 2,000,000 redemption
    rights, each carrying a maximum liability to ThermoLase of $20.25. 

    Use of Estimates
        The preparation of financial statements in conformity with generally
    accepted accounting principles requires management to make estimates and
    assumptions that affect the reported amounts of assets and liabilities,
    disclosure of contingent assets and liabilities at the date of the
    financial statements, and the reported amounts of revenues and expenses
    during the reporting period. Actual results could differ from those
    estimates.

    Presentation
        Certain amounts in fiscal 1996 have been reclassified to conform to
    the presentation in the fiscal 1997 financial statements.

    2.  Available-for-sale Investments

        The Company's debt and marketable equity securities are considered
    available-for-sale investments in the accompanying balance sheet and are
    carried at market value, with the difference between cost and market
    value, net of related tax effects, recorded currently as a component of
    shareholders' investment titled "Net unrealized loss on available-for-
    sale investments." 
        Available-for-sale investments in the accompanying balance sheet
    represents investments in government-agency securities. The difference
    between the market value and the cost basis of available-for-sale
    investments was $21,000 and $73,000 at fiscal year-end 1997 and 1996,
    respectively, which represent gross unrealized losses on those
    investments.

                                       15PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    2.  Available-for-sale Investments (continued)

        Available-for-sale investments in the accompanying 1997 balance sheet
    include $6,999,000 with contractual maturities of one year or less and
    $10,500,000 with contractual maturities of more than one year through
    five years. Actual maturities may differ from contractual maturities as a
    result of the Company's intent to sell these securities prior to maturity
    and as a result of put and call options that enable the Company, the
    issuer, or both to redeem these securities at an earlier date.
        The cost of available-for-sale investments that were sold was based
    on specific identification in determining realized gains and losses
    recorded in the accompanying statement of income. Gain on sale of
    investments in the accompanying statement of income for fiscal 1996 and
    1995 represents the gross realized gains relating to the sale of
    available-for-sale investments. 

    3.  Acquisitions and Joint Ventures

    Acquisitions
        In July 1997, Trex Communications acquired all of the outstanding
    common stock of CCS for approximately $10.1 million in cash and repaid
    approximately $1.0 million of pre-acquisition liabilities immediately
    after closing. CCS develops and markets interactive information and
    voice-response systems, as well as call-automation systems. The acquired
    assets of CCS included certain technologies for which technological
    feasibility had not been established at the acquisition date and that had
    no alternative future use. In connection with the acquisition, Trex
    Communications wrote off such technology in the amount of $1.4 million,
    which represents the portion of the purchase price allocated to the fair
    value of technology in development at the acquired business.
        In September 1996, Trex Medical acquired substantially all of the
    assets and liabilities of Continental X-Ray Corporation and affiliates
    (Continental) for approximately $18.4 million in cash, net of cash
    acquired and including the repayment of debt. Continental designs,
    manufactures, and markets general-purpose and specialized X-ray systems.
        In May 1996, Trex Medical acquired substantially all of the assets
    and liabilities of XRE Corporation (XRE) for $18.5 million in cash, net
    of cash acquired and including the repayment of debt. XRE designs,
    manufactures, and markets X-ray imaging systems used in the diagnosis and
    treatment of coronary artery disease and other vascular conditions.
        In September 1995, the Company acquired all of the outstanding
    capital stock of Bennett X-Ray Corporation (Bennett) for approximately
    $42.9 million in cash. In conjunction with the capitalization of Trex
    Medical, the Company transferred to Trex Medical all of the outstanding
    stock of Bennett in October 1995. Bennett manufactures high-frequency
    specialty and general-purpose X-ray systems.

                                       16PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    3.  Acquisitions and Joint Ventures (continued)

        These acquisitions have been accounted for using the purchase method
    of accounting, and their results of operations have been included in the
    accompanying financial statements from their respective dates of
    acquisition. The aggregate cost of these acquisitions exceeded the
    estimated fair value of the acquired net assets by $70.9 million, which
    is being amortized principally over 40 years. Allocation of the purchase
    price for these acquisitions was based on estimates of the fair value of
    the net assets acquired and, for CCS, is subject to adjustment upon
    finalization of the purchase price allocation. To date, no information
    has been gathered that would cause the Company to believe that the final
    allocation of the purchase price will be materially different from the
    preliminary estimate.
        Based on unaudited data, the following table presents selected
    financial information for the Company and Bennett on a pro forma basis,
    assuming that Bennett had been purchased at the beginning of 1995. The
    effect of acquisitions not included in the pro forma data was not
    material to the Company's results of operations.
                                                                         Nine
    (In thousands except                                         Months Ended
    per share amounts)                                         Sept. 30, 1995
    -------------------------------------------------------------------------
    Revenues                                                        $117,332
    Net income                                                        35,790
    Earnings per share                                                  1.89

        The pro forma results are not necessarily indicative of future
    operations or the actual results that would have occurred had the
    acquisition of Bennett been made at the beginning of 1995.
        In November 1992, the Company acquired Lorad for $5.3 million in
    cash, assumption of $6.7 million of pre-existing debt of Lorad, and
    shares of the Company's common stock and stock options valued at $12.3
    million. In addition, in March 1995, the Company made a cash payment of
    $2.3 million to the holders of approximately 9.2% of Lorad's common stock
    who had earlier voted against the acquisition, in exchange for their
    interest in Lorad.
        Other accrued expenses in the accompanying balance sheet include $2.5
    million at September 27, 1997, and $3.5 million at September 28, 1996,
    for estimated reserves associated with acquisitions, including a reserve
    of approximately $2 million for legal fees and other costs associated
    with a patent infringement suit that existed prior to the Company's
    acquisition of Lorad. This suit was brought by Fischer Imaging
    Corporation (Fischer), alleging that Lorad infringes on a Fischer patent
    on a precision mammographic needle-biopsy system. While the Company
    believes it has meritorious legal defenses to the allegation, due to the
    inherent uncertainties of litigation, the Company is unable to predict
    the outcome of this matter. Although an unsuccessful resolution could
    have a material adverse effect on the Company's results of operations,
    management does not believe that it is reasonably likely that any
    resolution would have a material adverse effect on the Company's
    financial position.

                                       17PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    3.  Acquisitions and Joint Ventures (continued)

    Joint Ventures
        ThermoLase has entered into three joint venture arrangements to
    market its SoftLight system internationally. ThermoLase currently holds a
    50% stake in each joint venture, but may increase its ownership to above
    50% pursuant to fair-value purchase options included in each agreement.
    Certain of the joint venture agreements provide that ThermoLase's joint
    venture partners may, under certain conditions, elect to sell all or part
    of their ownership interest back to ThermoLase at the fair value of such
    interest at the time the election is made. ThermoLase and its joint
    venture partners have committed to provide equity contributions or loans
    to fund the operating needs of the joint ventures. ThermoLase's share of
    such funding commitments totals approximately $8,200,000, of which it
    funded $1,144,000 in fiscal 1997 and $1,667,000 in October 1997. The
    accompanying fiscal 1997 statement of income includes $700,000 of equity
    in losses of joint ventures, reflecting ThermoLase's share of losses from
    joint venture operations.

    4.  Common Stock

        As of September 27, 1997, the Company had reserved 1,922,529 unissued
    shares of its common stock for possible issuance under stock-based
    compensation plans.

    5.  Employee Benefit Plans

    Stock-based Compensation Plans

    Stock Option Plans
    ------------------
        The Company has stock-based compensation plans for its key employees,
    directors, and others. Two of these plans, adopted in 1990, permit the
    grant of nonqualified and incentive stock options. The option recipients
    and the terms of options granted under these plans are determined by the
    human resources committee of the Company's Board of Directors (the Board
    Committee). Generally, options granted to date are exercisable
    immediately, but are subject to certain transfer restrictions and the
    right of the Company to repurchase shares issued upon exercise of the
    options at the exercise price, upon certain events. The restrictions and
    repurchase rights generally lapse ratably over periods ranging from five
    to ten years after the first anniversary of the grant date, depending on
    the term of the option, which may range from seven to twelve years.
    Nonqualified stock options may be granted at any price determined by the
    Board Committee, although incentive stock options must be granted at not
    less than the fair market value of the Company's stock on the date of
    grant. To date, with the exception of the options granted in connection
    with the acquisition of Lorad (Note 3), all options have been granted at
    fair market value. The Company also has a directors' stock option plan,
    adopted in 1991 and amended in fiscal 1995, that provides for the grant
    of stock options to nonemployee directors pursuant to a formula approved
                                       18PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    5.  Employee Benefit Plans (continued)

    by the Company's shareholders. Options awarded under this plan are
    exercisable six months after the date of grant and expire three or seven
    years after the date of grant. In addition to the Company's stock-based
    compensation plans, certain officers and key employees may also
    participate in stock-based compensation plans of Thermo Electron. 
        A summary of the Company's stock option information is as follows:

                              1997              1996               1995
                        ----------------  ----------------  ----------------
                                Weighted          Weighted          Range of
                        Number   Average  Number   Average  Number    Option
    (Shares in              of  Exercise      of  Exercise      of    Prices
    thousands)          Shares     Price  Shares     Price  Shares per Share
    ------------------------------------------------------------------------
    Options outstanding,
      beginning of                                                   $ 4.45-
      period            1,412    $15.21    1,470   $12.37    1,526   $15.62
                                                                      21.25-
        Granted            81     26.83      114    41.60      180    35.65
                                                                       4.45-
        Exercised         (77)     5.98     (172)    8.41     (190)   15.45
                                                                       4.45-
        Forfeited         (48)    29.43        -        -      (46)   15.45
                        -----              -----             -----
    Options outstanding,                                             $ 4.45-
     end of period      1,368    $15.93    1,412   $15.21    1,470   $35.65
                        =====    ======    =====   ======    =====   =======

                                                                     $ 4.45-
    Options exercisable 1,368    $15.93    1,412   $15.21    1,470   $35.65
                        =====    ======    =====   ======    =====   =======

    Options available
     for grant            485                518               131
                        =====              =====             =====

    Weighted average fair
      value per share of
      options granted
      during period              $12.17            $16.59
                                 ======            ======

                                       19PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    5.  Employee Benefit Plans (continued)

        A summary of the status of the Company's stock options at
    September 27, 1997, is as follows:

                                        Options Outstanding and Exercisable
                                        -----------------------------------
                                                       Weighted
                                                        Average    Weighted
                                         Number       Remaining     Average
                                             of     Contractual    Exercise
    Range of Exercise Prices             Shares            Life       Price
    -----------------------------------------------------------------------
    (Shares in thousands)

    $ 0.30 - $11.19                         495      0.9 years       $ 6.97
     11.20 -  22.09                         633      6.3 years        15.99
     22.10 -  32.98                         104      9.9 years        26.03
     32.99 -  43.88                         136      5.7 years        40.55
                                          -----
    $ 0.30 - $43.88                       1,368      4.6 years       $15.93
                                          =====

    Employee Stock Purchase Program
    -------------------------------
        Substantially all of the Company's full-time employees are eligible
    to participate in the Company's employee stock purchase program. Under
    this program, shares of the Company's and Thermo Electron's common stock
    can be purchased at the end of a 12-month plan year at 95% of the fair
    market value at the beginning of the period, and the shares purchased are
    subject to a six-month resale restriction. Prior to November 1, 1995, the
    applicable shares of common stock could be purchased at 85% of the fair
    market value at the beginning of the period, and the shares purchased
    were subject to a one-year resale restriction. Shares are purchased
    through payroll deductions of up to 10% of each participating employee's
    gross wages. During fiscal 1997 and 1996, the Company issued 17,068
    shares and 25,792 shares of its common stock, respectively, under this
    plan. No shares were issued under this program during fiscal 1995.

    Pro Forma Stock-based Compensation Expense
        In October 1995, the Financial Accounting Standards Board issued SFAS
    No. 123, "Accounting for Stock-based Compensation," which sets forth a
    fair-value based method of recognizing stock-based compensation expense.
    As permitted by SFAS No. 123, the Company has elected to continue to
    apply APB No. 25 to account for its stock-based compensation plans. Had
    compensation cost for awards in fiscal 1997 and 1996 under the Company's
    stock-based compensation plans been determined based on the fair value at

                                       20PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    5.  Employee Benefit Plans (continued)

    the grant dates consistent with the method set forth under SFAS No. 123,
    the effect on the Company's net income and earnings per share would have
    been as follows:

    (In thousands except per share amounts)                  1997      1996
    -----------------------------------------------------------------------
    Net income:
      As reported                                         $ 8,441   $42,575
      Pro forma                                             7,346    42,046

    Earnings per share:
      As reported                                             .44      2.16
      Pro forma                                               .38      2.14

        Because the method prescribed by SFAS No. 123 has not been applied to
    options granted prior to October 1, 1995, the resulting pro forma
    compensation expense may not be representative of the amount to be
    expected in future years. Compensation expense for options granted is
    reflected over the vesting period; therefore, future pro forma
    compensation expense may be greater as additional options are granted.
        The fair value of each option grant was estimated on the grant date
    using the Black-Scholes option-pricing model with the following
    weighted-average assumptions:

                                                        1997           1996
    -----------------------------------------------------------------------
    Volatility                                           37%            37%
    Risk-free interest rate                             6.1%           6.1%
    Expected life of options                       5.8 years      4.7 years

        The Black-Scholes option-pricing model was developed for use in
    estimating the fair value of traded options which have no vesting
    restrictions and are fully transferable. In addition, option-pricing
    models require the input of highly subjective assumptions including
    expected stock price volatility. Because the Company's employee stock
    options have characteristics significantly different from those of traded
    options, and because changes in the subjective input assumptions can
    materially affect the fair value estimate, in management's opinion, the
    existing models do not necessarily provide a reliable single measure of
    the fair value of its employee stock options.

    401(k) Savings Plan
        The majority of the Company's full-time employees are eligible to
    participate in Thermo Electron's 401(k) savings plan. Contributions to
    the 401(k) savings plan are made by both the employee and the Company.
    Company contributions are based upon the level of employee contributions.
    For these plans, the Company contributed and charged to expense
    $1,558,000, $1,166,000, and $653,000 in fiscal 1997, 1996, and 1995,
    respectively.

                                       21PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    6.  Income Taxes

        The components of the provision for income taxes are as follows:

    (In thousands)                                 1997      1996      1995
    -----------------------------------------------------------------------
    Currently payable:
      Federal                                   $ 8,146   $ 4,535   $ 1,517
      State                                       2,861     2,043       750
                                                -------   -------   -------
                                                 11,007     6,578     2,267
                                                -------   -------   -------
    Prepaid:
      Federal                                    (7,333)   (1,178)     (123)
      State                                        (200)      (59)      (29)
                                                -------   -------   -------
                                                 (7,533)   (1,237)     (152)
                                                -------   -------   -------
                                                $ 3,474   $ 5,341   $ 2,115
                                                =======   =======   =======

        The Company receives a tax deduction upon exercise of nonqualified
    stock options by employees for the difference between the exercise price
    and the market price of the Company's common stock on the date of
    exercise. The provision for income taxes that is currently payable does
    not reflect $3,999,000, $2,680,000, and $2,217,000 of such benefits of
    the Company and its majority-owned subsidiaries from employee exercises
    of stock options that have been allocated to capital in excess of par
    value, directly or through the effect of majority-owned subsidiaries'
    equity transactions in fiscal 1997, 1996, and 1995, respectively.
        The provision for income taxes in the accompanying statement of
    income differs from the provision calculated by applying the statutory
    federal income tax rate of 35% in fiscal 1997 and 1996 and 34% in fiscal
    1995 to income before provision for income taxes and minority interest
    due to the following:

    (In thousands)                                  1997      1996      1995
    ------------------------------------------------------------------------
    Provision for income taxes at statutory
      rate                                      $ 3,716   $ 16,902 $ 12,883
    Increases (decreases) resulting from:
      Gain on issuance of stock by subsidiaries  (2,774)   (13,702) (11,805)
      State income taxes, net of federal tax      1,730      1,288      476
      Amortization of cost in excess of net
        assets of acquired companies                730        680      495
      Write-off of acquired technology (Note 3)     490          -        -
      Other                                        (418)       173       66
                                                -------   -------- --------
                                                $ 3,474   $  5,341 $  2,115
                                                =======   ======== ========

                                       22PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    6.  Income Taxes (continued)

        Prepaid income taxes in the accompanying balance sheet consist of the
    following:

    (In thousands)                                 1997      1996
    -------------------------------------------------------------
    Prepaid income taxes:
      Inventory basis differences               $ 4,841   $ 2,827
      Accruals and other reserves                 3,939     3,750
      Net operating loss                          8,232     2,226
      Accrued compensation                        1,920     1,711
      Allowance for doubtful accounts               924       723
      Other, net                                     31       111
                                                -------   -------
                                                 19,887    11,348
      Less: Valuation allowance                   1,820     1,663
                                                -------   -------
                                                $18,067   $ 9,685
                                                =======   =======

        The valuation allowance relates primarily to employee exercises of
    stock options for which no tax benefit was recognized, and will be used
    to increase capital in excess of par value when the tax benefit is
    realized. As of September 27, 1997, ThermoLase had federal tax net
    operating loss carryforwards of approximately $24,000,000 that begin to
    expire in fiscal 2009.
        The Company has not recognized a deferred tax liability for the
    difference between the book basis and tax basis of the common stock of
    its domestic subsidiaries (such difference relates primarily to
    unremitted earnings and gains on issuance of stock by subsidiaries)
    because the Company does not expect this basis difference to become
    subject to tax at the parent level. The Company believes it can implement
    certain tax strategies to recover its investment in its domestic
    subsidiaries tax-free.


    7.  Related-party Transactions

    Corporate Services Agreement
        The Company and Thermo Electron have a corporate services agreement
    under which Thermo Electron's corporate staff provides certain
    administrative services, including certain legal advice and services,
    risk management, certain employee benefit administration, tax advice and
    preparation of tax returns, centralized cash management, and certain
    financial and other services, for which the Company pays Thermo Electron
    annually an amount equal to 1.0% of the Company's revenues. The Company
    paid an annual fee equal to 1.20% of the Company's revenues in calendar
    year 1995. The annual fee is reviewed and adjusted annually by mutual
    agreement of the parties. For these services, the Company was charged
    $2,821,000, $1,906,000, and $1,038,000 in fiscal 1997, 1996, and 1995,
    respectively. Management believes that the service fee charged by Thermo

                                       23PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    7.  Related-party Transactions (continued)

    Electron is reasonable and that such fees are representative of the
    expenses the Company would have incurred on a stand-alone basis. The
    corporate services agreement is renewed annually but can be terminated
    upon 30 days' prior notice by the Company or upon the Company's
    withdrawal from the Thermo Electron Corporate Charter (the Thermo
    Electron Corporate Charter defines the relationships among Thermo
    Electron and its majority-owned subsidiaries). For additional items such
    as employee benefit plans, insurance coverage, and other identifiable
    costs, Thermo Electron charges the Company based upon costs attributable
    to the Company.

    Other Related-party Services
        Data processing services and, from January 1995 through September
    1996, contract administration, are provided to the Company by a
    majority-owned subsidiary of Thermo Electron and are charged to the
    Company based on actual usage. For these services, the Company was
    charged $20,000, $90,000, and $139,000 in fiscal 1997, 1996, and 1995,
    respectively.

    Operating Leases
        Until June 1996, the Company leased two office and research
    facilities from Thermo Electron. In connection with the Company's
    decision to close its Massachusetts division (Note 11), the Company
    agreed to vacate these facilities during fiscal 1996. In addition, Trex
    Medical leases an office and manufacturing facility from a realty trust
    controlled by an employee under a noncancellable operating lease
    arrangement expiring in fiscal 2012. The accompanying statement of income
    includes expenses from these operating leases of $982,000, $375,000, and
    $123,000 in fiscal 1997, 1996, and 1995, respectively. Future minimum
    payments due under this noncancellable operating lease as of
    September 27, 1997, are $982,000 per year in fiscal 1998, 1999, 2000,
    2001, and 2002, and $9,497,000 in fiscal 2003 and thereafter. Total
    future minimum lease payments are $14,407,000.

    Repurchase Agreement
        The Company invests excess cash in a repurchase agreement with Thermo
    Electron as discussed in Note 1.

    Notes Receivable from Related Party
        During fiscal 1995 and fiscal 1996, the Company loaned $2,000,000 and
    $1,300,000, respectively, to Dolphin Acquisition Corporation (Dolphin).
    Borrowings bear interest at an annual rate of 6.0% and are due in June
    2000. Dolphin operates a retail chain of beauty product stores in
    California and other states within the United States. The president of
    ThermoLase is a shareholder and former officer of Dolphin.

    Notes Payable to Parent Company
        In September 1995, the Company borrowed $8,000,000 from Thermo
    Electron pursuant to a promissory note due September 1996. In September
    1996, the Company repaid such amount and borrowed an additional

                                       24PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    7.  Related-party Transactions (continued)

    $2,000,000 from Thermo Electron pursuant to a separate promissory note,
    which was repaid in April 1997. In addition, to finance the acquisition
    of CCS, Trex Communications borrowed $11,000,000 from Thermo Electron in
    July 1997 pursuant to a promissory note that the Company expects to repay
    in fiscal 1998 with the proceeds of its issuance of subordinated
    convertible debentures (Note 15). Each borrowing from Thermo Electron
    bears interest at the 90-day Commercial Paper Composite Rate plus 25
    basis points, set at the beginning of each quarter.

    Related-party Revenues
        Under an arrangement with Thermedics Detection Inc., a majority-owned
    subsidiary of Thermo Electron, Trex Medical manufactures an X-ray source,
    pursuant to written purchase orders, that is used as a component in a
    fill-measuring device produced by Thermedics Detection. During fiscal
    1997, 1996, and 1995, Trex Medical recorded $37,000, $361,000, and
    $120,000, respectively, of revenue under this arrangement.

    Vendor Agreement
        During 1995, Trex Medical placed an order for $2,500,000 for the
    design and production of high-transmission cellular grids from Thermo
    Electron's Tecomet division (Tecomet), which are expected to be received
    through fiscal 1999. During fiscal 1997 and 1996, the Company purchased
    grids valued at $678,000 and $397,000 from Tecomet under this
    arrangement. In addition, Trex Medical recorded expense of $250,000
    during fiscal 1995 related to research and development funding provided
    to Tecomet in connection with this project.

    Sale of Thermoelectric and Thermionics Businesses
        During fiscal 1996, the Company sold its thermoelectrics and
    thermionics businesses to two subsidiaries of Thermo Electron. The
    selling price for these companies of approximately $860,000 was based on
    the net book value of the net assets transferred. These businesses were
    not material to the Company's results of operations.


    8.  Subordinated Convertible Debentures

        In August 1997, ThermoLase issued and sold at par value $115,000,000
    principal amount of 4 3/8% subordinated convertible debentures due 2004.
    The debentures are convertible into shares of ThermoLase's common stock
    at a conversion price of $17.385 per share and are guaranteed on a
    subordinated basis by Thermo Electron. The Company has agreed to
    reimburse Thermo Electron in the event Thermo Electron is required to
    make a payment under the guarantee.
        See Note 12 for fair value information pertaining to these
    debentures.

                                       25PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    9.  Commitments and Contingencies

    Operating Leases
        In addition to the leases described in Note 7, the Company occupies
    office, research, manufacturing, and service facilities under various
    noncancellable operating lease arrangements that expire at various dates
    through 2013. The accompanying statement of income includes expenses from
    these operating leases of $6,288,000, $2,253,000, and $794,000, in fiscal
    1997, 1996, and 1995, respectively. Future minimum payments due under
    these noncancellable operating leases as of September 27, 1997, are
    $6,325,000 in fiscal 1998; $6,328,000 in fiscal 1999; $6,443,000 in
    fiscal 2000; $6,465,000 in fiscal 2001; $6,396,000 in fiscal 2002; and
    $28,893,000 in fiscal 2003 and thereafter. Total future minimum lease
    payments are $60,850,000.

    Technology License Agreement
        In June 1996, ThermoLase purchased an approximate 10% equity interest
    in AntiCancer (Note 1). In addition, ThermoLase has licensed from
    AntiCancer certain technology related to hair removal, stimulation of
    hair growth, suppression of hair growth, and hair coloring under an
    agreement that calls for up to $1,500,000 in future payments by
    ThermoLase upon the attainment of certain milestones by AntiCancer. In
    addition to such future payments, ThermoLase will be substantially
    responsible for development costs incurred after attainment of such
    milestones. In the event that the funded development efforts result in
    commercially viable products that ThermoLase elects to market, ThermoLase
    will pay AntiCancer a royalty based on sales, subject to certain minimum
    payments.

    Contingencies
        ThermoLase has from time to time received allegations that its
    patented SoftLight laser-based system for the removal of unwanted hair
    infringes the intellectual property rights of others, and ThermoLase may
    continue to receive such allegations in the future. In general, an owner
    of intellectual property can prevent others from using such property and
    is entitled to damages for unauthorized past usage. The Company has
    investigated the bases of the allegations ThermoLase has received to date
    and, based on opinions of its counsel, believes that if ThermoLase were
    sued on these bases it would have meritorious defenses.
        The Company is aware of two U.S. patents owned by a former employee
    which have been asserted against Trex Medical relating to its
    High-Transmission Cellular (HTC)(TM) grid used with Trex Medical's
    mammography systems. Although the Company believes that the HTC grid does
    not infringe either of these patents, if the holder of the patents were
    successful in enforcing such patents, the Company could be subject to
    damages and enjoined from manufacturing and selling the HTC grid.
        See Note 3 for a discussion of certain litigation.

                                       26PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    9.  Commitments and Contingencies (continued)

        Due to the inherent uncertainty of dispute resolution, management
    cannot predict the outcome of the above matters. While an unfavorable
    outcome of one or both of these matters could have a material adverse
    effect on the Company's results of operations, management does not
    believe that it is reasonably likely that any resolution would have a
    material adverse effect on the Company's financial position.


    10. Transactions in Stock of Subsidiaries

        In September 1997, Trex Communications sold 1,133,000 shares of its
    common stock in a private placement at $10.00 per share for net proceeds
    of $10,550,000, resulting in a gain of $5,929,000.
        In December 1996, Trex Medical sold 300,000 shares of its common
    stock at $14.50 per share for net proceeds of $4,119,000, resulting in a
    gain of $1,997,000. 
        In July 1996, Trex Medical sold 2,875,000 shares of its common stock
    in an initial public offering, and 871,832 shares of its common stock in
    a concurrent rights offering, at $14.00 per share, for net proceeds of
    $49,068,000, resulting in a gain of $25,645,000.
        In January 1996, Trex Medical sold 100,000 shares of its common stock
    at $10.75 per share for net proceeds of $1,070,000, resulting in a gain
    of $732,000. In November 1995, Trex Medical sold 1,862,000 shares of its
    common stock in a private placement at $10.25 per share for net proceeds
    of $17,619,000, resulting in gain of $12,772,000.
        In June 1995, ThermoLase sold 150,000 shares and 50,000 shares of its
    common stock at $13.75 and $12.825 per share, respectively, in private
    placements for net proceeds of $2,563,000, resulting in a gain of
    $1,661,000. In August 1995, ThermoLase sold 2,250,000 shares of its
    common stock at $25.25 per share in a public offering for net proceeds of
    $52,772,000, resulting in a gain of $33,060,000.
        The Company's percentage ownership of its majority-owned subsidiaries
    at fiscal year-end was as follows:

                                                   1997       1996     1995
    -----------------------------------------------------------------------
    ThermoLase                                     67%        64%       65%
    Trex Medical                                   79%        80%      100%
    Trex Communications                            78%       100%      100%


    11. Costs Associated with Divisional Restructuring

        Costs associated with divisional restructuring in the accompanying
    fiscal 1995 statement of income result from the decision to close the
    Company's division located in Waltham, Massachusetts. The costs primarily
    represent the write-off of cost in excess of net assets of acquired
    companies and disposal of equipment.

                                       27PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    12. Fair Value of Financial Instruments

        The Company's financial instruments consist primarily of cash and
    cash equivalents, available-for-sale investments, accounts receivable,
    note payable to parent company, accounts payable, and due to parent
    company and affiliated companies. The carrying amounts of the Company's
    cash and cash equivalents, accounts receivable, note payable to parent
    company, accounts payable, and due to parent company and affiliated
    companies approximate fair value due to their short-term nature. 
        Available-for-sale investments are carried at fair value in the
    accompanying balance sheet. The fair values were determined based on
    quoted market prices. See Note 2 for information pertaining to the fair
    value of available-for-sale investments.
        The fair value of ThermoLase's subordinated convertible debentures,
    based on quoted market prices, was $123,165,000 at September 27, 1997,
    and exceeds the carrying amount primarily due to an increase in the
    market price of ThermoLase's common stock relative to the conversion
    price of the debentures.


    13. Segment Data, Significant Customers, and Export Sales

        The Company's business segments include the following:
              Medical Products manufactured by the Company's Trex Medical
              subsidiary, including mammography equipment, minimally
              invasive digital breast-biopsy equipment, general X-ray
              equipment, and specialized X-ray equipment, including imaging
              systems used during diagnostic and interventional vascular and
              cardiac procedures such as balloon angioplasty.
              Personal-care Products and Services offered by the Company's
              ThermoLase subsidiary, including high-quality skin-care and
              other personal-care products manufactured by CBI, hair-removal
              services performed at ThermoLase's Spa Thira locations, and
              the licensing of the SoftLight hair-removal system to
              physicians in the U.S. and to international licensees.
              Advanced Technology Research performed by Trex Communications
              and the Company's wholly owned subsidiary in the fields of
              communications, avionics, X-ray detection, signal processing,
              and lasers, funded by the U.S. government and other customers.
              The Advanced Technology research segment in fiscal 1997 also
              includes interactive information and voice-response systems,
              as well as call-automation systems, designed and marketed by
              Trex Communications' CCS subsidiary, acquired July 1997.

                                       28PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    13. Segment Data, Significant Customers, and Export Sales (continued)

    (In thousands)                             1997         1996       1995
    -----------------------------------------------------------------------
    Revenues:
        Medical Products                   $229,294     $150,195   $ 55,291
        Personal-care Products and Services  45,233       27,812     17,544
        Advanced Technology Research         21,250       14,401     14,841
        Intersegment Sales Elimination      (13,656)     (10,379)    (1,145)
                                           --------     --------   --------
                                           $282,121     $182,029   $ 86,531
                                           ========     ========   ========
    Income before provision for income
      taxes and minority interest:
        Medical Products                   $ 24,147     $ 15,342   $  6,787
        Personal-care Products and Services (18,402)      (4,979)    (2,970)
        Advanced Technology Research (a)     (1,345)      (3,053)    (1,676)
        Corporate (b)                        (4,925)      (3,795)    (2,382)
                                           --------     --------   --------
        Total operating income (loss)          (525)       3,515       (241)
        Interest and other income, net       11,143       44,777     38,132
                                           --------     --------   --------
                                           $ 10,618     $ 48,292   $ 37,891
                                           ========     ========   ========
    Identifiable assets:
        Medical Products                   $229,437     $200,850   $102,374
        Personal-care Products and Services 167,339       91,713     89,292
        Advanced Technology Research         34,168       12,004     16,586
        Corporate (c)                        19,173       15,655     22,529
                                           --------     --------   --------
                                           $450,117     $320,222   $230,781
                                           ========     ========   ========
    Depreciation and amortization:
        Medical Products                   $  4,996     $  3,195   $  1,311
        Personal-care Products and Services   3,628        1,362        640
        Advanced Technology Research            656          345        337
                                           --------     --------   --------
                                           $  9,280     $  4,902   $  2,288
                                           ========     ========   ========

    Capital expenditures:
        Medical Products                   $  5,461     $  3,071   $    957
        Personal-care Products and Services  20,285        9,423      1,409
        Advanced Technology Research          1,107        1,968        237
                                           --------     --------   --------
                                           $ 26,853     $ 14,462   $  2,603
                                           ========     ========   ========

    (a) Reflects the write-off of $1,400,000 of acquired technology
        related to the acquisition of CCS (Note 3).
    (b) Primarily general and administrative expenses.
    (c) Primarily cash, cash equivalents, and available-for-sale investments
        at the Company's headquarters.
                                       29PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                   Notes to Consolidated Financial Statements

    13. Segment Data, Significant Customers, and Export Sales (continued)

        U.S. government agencies accounted for less than 10% of the Company's
    total revenues in fiscal 1997 and 1996, and 17% of the Company's total
    revenues in fiscal 1995. In the Medical Products segment, sales to one
    customer in fiscal 1997, and to another customer in fiscal 1995,
    accounted for 14% and 11%, respectively, of the Company's total revenues
    in those periods. No single customer accounted for 10% or more of the
    Company's total revenues in fiscal 1996. Export sales, including revenues
    earned from ThermoLase's international licensing arrangements, were
    $43,208,000, $35,908,000, and $12,374,000 in fiscal 1997, 1996, and 1995,
    respectively. In general, export sales are denominated in U.S. dollars.


    14. Unaudited Quarterly Information

    (In thousands except per share amounts)

    1997(a)                       First     Second      Third    Fourth(b)
    ----------------------------------------------------------------------
    Revenues                    $62,826    $70,078    $72,931     $76,286
    Gross profit                 22,773     23,300     26,694      29,218
    Net income                    2,763        188        285       5,205
    Earnings per share              .14        .01        .01         .27

    1996(c)                       First     Second    Third(d)   Fourth(e)
    ----------------------------------------------------------------------
    Revenues                   $43,095     $42,699    $42,772     $53,463
    Gross profit                16,763      17,540     17,041      18,440
    Net income                  14,172       2,103      1,071      25,229
    Earnings per share             .72         .11        .05        1.32

    (a) Results include nontaxable gains of $1,997,000 and $5,929,000 in the
        first and fourth quarters, respectively, from the issuance of stock
        by subsidiaries.
    (b) Reflects the July 1997 acquisition of CCS.
    (c) Results include nontaxable gains of $12,772,000, $732,000, and
        $25,645,000 in the first, second, and fourth quarters, respectively,
        from the issuance of stock by subsidiaries.
    (d) Reflects the May 1996 acquisition of XRE.
    (e) Reflects the September 1996 acquisition of Continental.


    15.  Subsequent Event

        In November 1997, the Company sold at par value $124,500,000
    principal amount of 3 1/4% subordinated convertible debentures due 2007,
    including $10,000,000 principal amount of such debentures sold to Thermo
    Electron. The debentures are convertible into shares of the Company's
    common stock at a conversion price of $27.00 per share and are guaranteed
    on a subordinated basis by Thermo Electron.

                                       30PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                    Report of Independent Public Accountants

    To the Shareholders and Board of Directors of ThermoTrex Corporation:

        We have audited the accompanying consolidated balance sheet of
    ThermoTrex Corporation (a Delaware corporation and 53%-owned subsidiary
    of Thermo Electron Corporation) and subsidiaries as of September 27,
    1997, and September 28, 1996, and the related consolidated statements of
    income, shareholders' investment, and cash flows for the years ended
    September 27, 1997, and September 28, 1996, and the nine months ended
    September 30, 1995. These consolidated financial statements are the
    responsibility of the Company's management. Our responsibility is to
    express an opinion on these consolidated financial statements based on
    our audits.
        We conducted our audits in accordance with generally accepted
    auditing standards. Those standards require that we plan and perform the
    audit to obtain reasonable assurance about whether the financial
    statements are free of material misstatement. An audit includes
    examining, on a test basis, evidence supporting the amounts and
    disclosures in the financial statements. An audit also includes assessing
    the accounting principles used and significant estimates made by
    management, as well as evaluating the overall financial statement
    presentation. We believe that our audits provide a reasonable basis for
    our opinion.
        In our opinion, the consolidated financial statements referred to
    above present fairly, in all material respects, the financial position of
    ThermoTrex Corporation and its subsidiaries as of September 27, 1997, and
    September 28, 1996, and the results of their operations and their cash
    flows for the years ended September 27, 1997, and September 28, 1996, and
    the nine months ended September 30, 1995, in conformity with generally
    accepted accounting principles.



                                                Arthur Andersen LLP



    Boston, Massachusetts
    November 3, 1997

                                       31PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                     Management's Discussion and Analysis of
                  Financial Condition and Results of Operations

        Forward-looking statements, within the meaning of Section 21E of the
    Securities Exchange Act of 1934, are made throughout this Management's
    Discussion and Analysis of Financial Condition and Results of Operations.
    For this purpose, any statements contained herein that are not statements
    of historical fact may be deemed to be forward-looking statements.
    Without limiting the foregoing, the words "believes," "anticipates,"
    "plans," "expects," "seeks," "estimates," and similar expressions are
    intended to identify forward-looking statements. There are a number of
    important factors that could cause the results of the Company to differ
    materially from those indicated by such forward-looking statements,
    including those detailed immediately after this Management's Discussion
    and Analysis of Financial Condition and Results of Operation under the
    heading "Forward-looking Statements."

    Overview

        The Company operates in three business segments: Medical Products
    manufactured by the Company's Trex Medical Corporation (Trex Medical)
    subsidiary, Personal-care Products and Services offered by the Company's
    ThermoLase Corporation (ThermoLase) subsidiary, and Advanced Technology
    Research, including the laser communications research performed by the
    Company's Trex Communications Corporation (Trex Communications)
    subsidiary.
        Trex Medical designs, manufactures, and markets mammography equipment
    and minimally invasive digital breast-biopsy systems, general-purpose
    X-ray equipment, and specialized X-ray equipment, including imaging
    systems used during diagnostic and interventional vascular and cardiac
    procedures such as balloon angioplasty. Trex Medical sells its systems
    worldwide principally through a network of independent dealers, and also
    acts as an original equipment manufacturer (OEM) for other medical
    equipment companies. Trex Medical has four operating units: Lorad, a
    manufacturer of mammography and digital breast-biopsy systems; Bennett
    X-Ray Corporation (Bennett), a manufacturer of general-purpose X-ray and
    mammography equipment; XRE Corporation (XRE), a manufacturer of X-ray
    imaging systems used in the diagnosis and treatment of coronary artery
    disease and other vascular conditions; and Continental X-Ray Corporation
    (Continental), a manufacturer of general-purpose and specialized X-ray
    systems.
        ThermoLase has developed a laser-based system called SoftLight(SM)
    for the removal of unwanted hair. The SoftLight system uses a low-energy,
    dermatology laser in combination with a lotion that absorbs the laser's
    energy to disable hair follicles. In April 1995, the Company received
    clearance from the U.S. Food and Drug Administration (FDA) to
    commercially market hair-removal services using the SoftLight system.
    ThermoLase began earning revenue from the SoftLight system in the first
    quarter of fiscal 1996 as a result of opening its first commercial
    location (Spa Thira) in November 1995. ThermoLase opened a total of four
    spas during fiscal 1996, opened nine additional spas during fiscal 1997,
    and, by October 1997, had a total of 14 domestic Spa Thira locations,  

                                       32PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                     Management's Discussion and Analysis of
                  Financial Condition and Results of Operations

    Overview (continued)

    with one additional lease signed. In addition, its international
    arrangements resulted in the opening of spas in Paris in May 1997 and
    Lugano, Switzerland, in October 1997. In June 1996, ThermoLase commenced
    a program to license to physicians and others the right to perform the
    Company's patented SoftLight hair-removal procedure. In this program,
    ThermoLase licenses its technology and receives a one-time fee and a
    per-procedure royalty that varies depending on the anatomical site
    treated and pricing plan selected by the client. ThermoLase also provides
    the licensees with the lasers and lotion that are necessary to perform
    the service. ThermoLase is marketing the SoftLight system internationally
    through joint ventures and other licensing arrangements. In January 1996,
    ThermoLase established a joint venture in Japan. During fiscal 1997,
    ThermoLase established joint ventures in France in November 1996 and
    England in September 1997, and six additional licensing arrangements: in
    Saudi Arabia in November 1996; in Tunisia and Belgium in December 1996;
    in the United Arab Emirates and Oman in March 1997; in Switzerland in
    April 1997; in Brazil in June 1997; and in the United Kingdom (excluding
    England) and the Republic of Ireland in September 1997.
        ThermoLase continues to pursue an extensive research and development
    program to improve the efficacy and duration of its hair-removal
    treatment. ThermoLase has developed a modification to its procedure,
    called SoftLight 2.0, and began introducing this procedure in its spas
    and to its licensees in September 1997. Although the clinical laboratory
    results are encouraging, the results are preliminary and there can be no
    assurance that SoftLight 2.0 will be successful in improving the hair-
    removal process. ThermoLase believes that improvements in the hair-
    removal procedure are critical elements in its ability to improve the
    profitability of its business.
        In March 1997, ThermoLase filed with the FDA a 510(k) application
    seeking clearance to market cosmetic skin-resurfacing services utilizing
    its SoftLight Rejuvenation(TM) Laser, including wrinkle- and skin-texture
    treatment. This technology, which uses the same laser as ThermoLase's
    hair-removal system, is designed to improve the skin's appearance and
    texture. ThermoLase also manufactures and markets skin-care, bath, and
    body products through its CBI Laboratories, Inc. (CBI) subsidiary, which
    also manufactures the lotion used in the SoftLight hair-removal process.
        The Company's Advanced Technology Research segment performs research
    primarily in the fields of communications, avionics, X-ray detection,
    signal processing, and lasers. The Company has developed its expertise in
    these core technologies in connection with government-sponsored research
    and development. The Advanced Technology Research segment includes the
    Company's Trex Communications subsidiary, which is developing a laser
    communications (lasercom) technology, designed to move very large amounts
    of data quickly via lasers without the need for wires or licensing from
    the Federal Communications Commission. In July 1997, Trex Communications
    acquired Computer Communications Specialists, Inc. (CCS), which designs
    and markets interactive information and voice-response systems, as well
    as call-automation systems.

                                       33PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                     Management's Discussion and Analysis of
                  Financial Condition and Results of Operations

    Overview (continued)

        The Company conducts all of its manufacturing operations in the
    United States and distributes its products, services, and technologies
    worldwide. The Company anticipates that an increasing percentage of its
    revenues will be from international sales. The Company's international
    sales are generally denominated in U.S. dollars; however, the Company's
    financial performance and competitive position can be affected by
    currency exchange rate fluctuations affecting the relationship between
    the U.S. dollar and foreign currencies.

    Results of Operations

        In September 1995, the Company changed its fiscal year end from the
    Saturday nearest December 31 to the Saturday nearest September 30.
    Accordingly, the results of operations for 1996 compares the year ended
    September 28, 1996 (fiscal 1996) with the unaudited year ended September
    30, 1995 (1995). 

    Fiscal 1997 Compared With Fiscal 1996
        Total revenues increased 55% to $282.1 million in fiscal 1997 from
    $182.0 million in fiscal 1996. Medical Products segment revenues,
    excluding intersegment sales, increased 54% to $217.9 million in fiscal
    1997 from $141.8 million in fiscal 1996. Revenues increased $56.2 million
    as a result of the acquisitions of XRE in May 1996 and Continental in
    September 1996. In addition, revenues at Lorad, excluding intersegment
    sales, increased 18% as a result of increased sales of higher-priced
    mammography systems and increased demand for biopsy systems, offset in
    part by a decline in demand for nondestructive testing (NDT) systems.
        Personal-care Products and Services segment revenues increased 63% to
    $45.2 million in fiscal 1997 from $27.8 million in fiscal 1996.
    ThermoLase earned revenues from hair-removal services and related
    activities of $21.0 million in fiscal 1997, compared with $4.6 million in
    fiscal 1996. The increase in revenues resulted primarily from an increase
    in the number of U.S. spas to 13, nine of which opened in fiscal 1997,
    compared with four spas open during fiscal 1996. ThermoLase changed its
    pricing plan in March 1997 to offer single or multiple treatment plans,
    and continues to evaluate its pricing plans. ThermoLase defers revenue
    related to payments for multiple treatment plans, which is recognized
    over the anticipated treatment period. As ThermoLase collects further
    data concerning the number of treatments required and duration of the
    treatment period, the period of revenue recognition may be affected.
    Revenues also increased as a result of fees from ThermoLase's physicians'
    licensing program, which was started in the third quarter of fiscal 1996
    and did not produce significant revenues during fiscal 1996. In addition,
    revenues from hair-removal services and related activities in fiscal 1997
    included $4.2 million of minimum guaranteed payments recorded upon
    granting technology rights under ThermoLase's international licensing
    arrangements, compared with $2.0 million in fiscal 1996. The amount of
    minimum guaranteed payments recorded by ThermoLase will vary depending on
    its ability to enter into additional international licensing arrangements

                                       34PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                     Management's Discussion and Analysis of
                  Financial Condition and Results of Operations

    Fiscal 1997 Compared With Fiscal 1996 (continued)
    and the terms of any such arrangements. Revenues at CBI increased
    slightly to $24.2 million in fiscal 1997 from $23.2 million in fiscal
    1996. A portion of CBI's revenues are derived from sales to large
    retailers, which have a relatively long buying cycle that results in
    periodic variations in revenues. The Company estimates that CBI will
    continue to represent a decreasing portion of total revenues within this
    segment as revenues from hair-removal services and related activities
    increase.
        Advanced Technology Research segment revenues, excluding intersegment
    sales, increased to $19.0 million in fiscal 1997 from $12.4 million in
    fiscal 1996. Revenues increased $2.8 million due to the inclusion of
    product revenues from CCS, acquired in July 1997, and due to higher
    revenues earned from research performed under government contracts,
    primarily in the areas of laser-radar systems and laser communications.
    The Company estimates that revenues from Advanced Technology Research
    will continue to decline as a percentage of total revenues.
        The gross profit margin was 36% in fiscal 1997, compared with 38% in
    fiscal 1996. The Medical Products segment gross profit margin, excluding
    intersegment sales, declined to 40% in fiscal 1997 from 42% in fiscal
    1996, primarily due to sales of certain recently introduced products that
    incurred high start-up production costs, the inclusion of lower-margin
    revenues at Continental, and the mix of products sold at Bennett. The
    Personal-care Products and Services segment gross profit margin was 20%
    in fiscal 1997, compared with 28% in fiscal 1996. ThermoLase's
    hair-removal business reported gross profit of $1.4 million in fiscal
    1997, compared with gross profit of negative $0.3 million in fiscal 1996.
    Each period was impacted by the early operations of the Spa Thira
    business, which has been operating below maximum capacity as ThermoLase
    develops a client base and continues refining its process and operating
    procedures, and due to pre-opening costs incurred in connection with new
    spa openings, offset in part by the effect of physicians' licensing fees
    and minimum guaranteed payments relating to international licensing
    arrangements, which have a relatively high gross profit margin. In fiscal
    1998, the effect of operating each spa below maximum capacity, as
    ThermoLase develops its client base, will continue to have a negative
    impact on its gross profit margin. ThermoLase believes that improvements
    in the efficacy and duration of the SoftLight process are critical
    elements in its ability to improve the profitability of its spas. The
    decline in the Personal-care Products and Services segment gross profit
    margin in fiscal 1997 also resulted from lower margins at CBI due to a
    continued shift to lower-margin products.
        Selling, general, and administrative expenses as a percentage of
    revenues increased to 24% in fiscal 1997 from 23% in fiscal 1996.
    Spending in the Personal-care Products and Services segment increased
    primarily due to costs related to expanding ThermoLase's administrative
    and management efforts for its Spa Thira business and domestic and
    international licensing programs; increased marketing efforts, including
    national advertising costs for the physicians' licensing program; and
    legal costs associated with obtaining and protecting ThermoLase's patent
    rights. These increases were offset in part by the impact of the

                                       35PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                     Management's Discussion and Analysis of
                  Financial Condition and Results of Operations

    Fiscal 1997 Compared With Fiscal 1996 (continued)
    significant increase in Medical Products segment revenues, which has
    lower expenses as a percentage of revenues.
        Research and development expenses increased to $32.1 million in
    fiscal 1997 from $25.0 million in fiscal 1996, primarily due to increased
    spending at Trex Medical and, to a lesser extent, increased spending at
    ThermoLase for pre-clinical and clinical research related to improving
    the effectiveness of its hair-removal process and developing its
    SoftLight Rejuvenation Laser skin-treatment, and the investigation of
    other health and beauty applications for its proprietary laser
    technology. The increase at Trex Medical was primarily due to the
    inclusion of $5.6 million of additional expense due to the acquisitions
    of XRE and Continental, and reflects its continued efforts to develop and
    commercialize new products, including the full-field digital mammography
    system and direct-detection X-ray sensor, as well as enhancements of
    existing systems. 
        During 1996, the Company's Trex Communications subsidiary wrote off
    $1.4 million of acquired technology in connection with the acquisition of
    CCS (Note 3).
        Interest income decreased to $4.8 million in fiscal 1997 from
    $6.0 million in fiscal 1996, primarily due to lower average invested
    balances, which resulted primarily from property and equipment
    expenditures for ThermoLase's Spa Thira locations and licensing programs.
    Interest expense increased to $0.8 million in fiscal 1997 from
    $0.5 million in fiscal 1996, primarily due to the August 1997 issuance by
    ThermoLase of $115.0 million principal amount of 4 3/8% subordinated
    convertible debentures. The Company expects that its interest expense and
    interest income will increase in fiscal 1998 as a result of the
    November 1997 issuance of $124.5 million principal amount of 3 1/4%
    subordinated convertible debentures and the investment of the related
    proceeds (Note 8).
        The Company has adopted a strategy of spinning out certain of its
    businesses into separate subsidiaries and having these subsidiaries sell
    a minority interest to outside investors. The Company believes that this
    strategy provides additional motivation and incentives for the management
    of the subsidiaries through the establishment of subsidiary-level stock
    option incentive programs, as well as capital to support the
    subsidiaries' growth. As a result of the sale of stock by Trex Medical
    and Trex Communications, the Company recorded gains on issuance of stock
    by subsidiaries of $7.9 million in fiscal 1997 and $39.1 million in
    fiscal 1996 (Note 10). The size and timing of these transactions are
    dependent on market and other conditions that are beyond the Company's
    control. In addition, in October 1995, the Financial Accounting Standards
    Board (FASB) issued an exposure draft of a Proposed Statement of
    Financial Accounting Standards, "Consolidated Financial Statements:
    Policy and Procedures" (the Proposed Statement). The Proposed Statement
    would establish new rules for how consolidated financial statements
    should be prepared. If the Proposed Statement is adopted, there could be
    significant changes in the way the Company records certain transactions
    of its controlled subsidiaries. Among those changes, any sale of the
    stock of a subsidiary that does not result in a loss of control would be

                                       36PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                     Management's Discussion and Analysis of
                  Financial Condition and Results of Operations

    Fiscal 1997 Compared With Fiscal 1996 (continued)
    accounted for as a transaction in the equity of the consolidated entity
    with no gain or loss being recorded. The FASB continues to deliberate on
    this issue and the timing and contents of any final statement are
    uncertain. Accordingly, there can be no assurance that the Company will
    be able to realize gains from such transactions in the future.
        Equity in losses of joint ventures in the accompanying statement of
    income represents ThermoLase's proportionate share of losses from its
    international joint ventures.
        Minority interest income was $1.3 million in fiscal 1997, compared
    with minority interest expense of $0.4 million in fiscal 1996, as a
    result of an increase in ThermoLase's net loss, offset in part by an
    increase in Trex Medical's net income.
        The effective tax rate in both periods was below the statutory income
    tax rate primarily due to nontaxable gains on issuance of stock by
    subsidiaries, offset in part by the impact of state income taxes,
    nondeductible amortization of cost in excess of net assets of acquired
    companies, and, in fiscal 1997, the nondeductible write-off of acquired
    technology associated with the acquisition of CCS (Note 3).
        The Company believes that it is more likely than not that it will
    realize a benefit from the tax asset that arises as a result of recording
    a benefit from ThermoLase's loss before income taxes. The Company
    believes that future taxable income, including any income from tax
    planning strategies, will be sufficient to realize such benefit within
    the 15-year federal carryforward period for net operating losses.
        The Company is a defendant in certain patent litigation (Note 3) and
    has been notified that it allegedly infringes other technology owned by a
    third party (Notes 3 and 9). While an unfavorable outcome of one or both
    of these matters could have a material adverse effect on the Company's
    results of operations, the Company does not believe that it is reasonably
    likely that any resolution would have a material adverse effect on the
    Company's financial position.

    Fiscal 1996 Compared With 1995
        Total revenues increased 63% to $182.0 million in fiscal 1996 from
    $111.6 million in 1995. Medical Products segment revenues, excluding
    intersegment sales, increased 102% to $141.8 million in fiscal 1996,
    compared with $70.2 million in 1995. Medical Products segment revenues
    increased $56.2 million due to the acquisitions of Bennett, XRE, and
    Continental. In addition, revenues at Lorad, excluding intersegment
    sales, increased 24% as a result of increased demand for mammography
    systems and NDT systems. Personal-care Products and Services segment
    revenues increased 19% to $27.8 million in fiscal 1996 from $23.3 million
    in 1995, primarily due to the inclusion of $2.6 million in revenues from
    ThermoLase's Spa Thira business and physicians' licensing program, as
    well as $2.0 million in SoftLight licensing fees from an international
    arrangement. Revenues at CBI were $23.2 million in fiscal 1996, compared
    with $23.3 million in 1995. During fiscal 1996, ThermoLase opened its
    first four Spa Thira locations, including two that opened in September
    1996. Under the 1996 pricing structure, the majority of spa clients paid
    a fixed fee in advance to receive a series of treatments, as necessary.

                                       37PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                     Management's Discussion and Analysis of
                  Financial Condition and Results of Operations

    Fiscal 1996 Compared With 1995 (continued)
    Consequently, ThermoLase deferred revenue related to such payments, which
    was recognized over the anticipated treatment period.
        Advanced Technology Research segment revenues, excluding intersegment
    sales, declined to $12.4 million in fiscal 1996, from $18.1 million in
    1995, primarily due to lower funding levels for the Company's
    government-sponsored research and development contracts and the sale of
    the Company's thermoelectrics and thermionics businesses.
        The gross profit margin declined to 38% in fiscal 1996, compared with
    41% in 1995. The Medical Products segment gross profit margin, excluding
    intersegment sales, declined to 42% in fiscal 1996 from 49% in 1995,
    primarily due to the inclusion of lower-margin revenues at Bennett and
    XRE. The Personal-care Products and Services segment gross profit margin
    was 28% in fiscal 1996, compared with 37% in 1995. The gross profit from
    ThermoLase's hair-removal business was negative $317,000 in fiscal 1996
    due to the early operations of the Spa Thira business, which was operated
    below maximum capacity as ThermoLase developed a client base, continued
    refining its operating procedures, and incurred pre-opening costs, offset
    in part by the effect of revenues from international and physicians'
    licensing arrangements. In addition, the decline in the gross profit
    margin in fiscal 1996 resulted from lower margins at CBI due to a shift
    to lower-margin products. The Advanced Technology Research segment gross
    profit margin decreased to 17% in fiscal 1996 from 19% in 1995, primarily
    due to cost overruns on certain contracts, offset in part by the absence
    of certain lower-margin contracts as a result of the closure of the
    Company's Massachusetts division in 1995 (Note 11).
        Selling, general, and administrative expenses as a percentage of
    revenues declined to 23% in fiscal 1996 from 24% in 1995, primarily due
    to increased revenues at Lorad and the inclusion of the operations of
    Bennett and XRE, which incurred lower expenses as a percentage of
    revenues. This decrease was offset in part by an increase in selling,
    general, and administrative expenses as a percentage of revenues for the
    Advanced Technology Research segment primarily due to its decrease in
    revenues.
        Research and development expenses increased to $25.0 million in
    fiscal 1996 from $18.0 million in 1995, due to the inclusion of
    $4.2 million of expense at Bennett and XRE, and continued efforts to
    develop and commercialize new products including the M-IV mammography
    system (first shipped in the fourth quarter of fiscal 1996), the
    full-field digital mammography system, and the direct-detection X-ray
    sensor, as well as enhancements of existing systems.
        In 1995 the Company recorded restructuring expenses of $1.0 million
    resulting from the decision to close its Massachusetts division
    (Note 11). During fiscal 1996 and 1995, this division recorded revenues
    of $0.4 million and $3.0 million, respectively, and incurred operating
    losses of $0.1 million and $0.7 million, respectively.
        Interest income increased to $6.0 million in fiscal 1996 from
    $4.2 million in 1995, primarily as a result of interest income earned on
    invested proceeds from ThermoLase's August 1995 public offering of common
    stock and Trex Medical's private placements of common stock in November
    1995 and January 1996 and its initial public offering in July 1996.

                                       38PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                     Management's Discussion and Analysis of
                  Financial Condition and Results of Operations

    Fiscal 1996 Compared With 1995 (continued)
    Interest expense in fiscal 1996 and 1995 primarily represents interest
    associated with an $8.0 million promissory note issued to Thermo Electron
    in September 1995. This note was repaid in September 1996, and the
    Company issued a $2.0 million promissory note to Thermo Electron on
    similar terms.
        As a result of the sale of stock by Trex Medical in fiscal 1996 and
    ThermoLase in 1995, the Company recorded gains on issuance of stock by
    subsidiaries of $39.1 million and $34.7 million in fiscal 1996 and 1995,
    respectively (Note 10). 
        Minority interest expense in fiscal 1996 represents minority
    shareholders' allocable share of Trex Medical's net income, offset in
    part by minority shareholders' allocable share of ThermoLase's net loss.
    Minority interest income in 1995 represents minority shareholders'
    allocable share of ThermoLase's net loss.
        The effective tax rates in fiscal 1996 and 1995 differ from the
    statutory federal income tax rate due to the nontaxable gains on issuance
    of stock by subsidiaries, offset in part by nondeductible amortization of
    cost in excess of net assets of acquired companies and the impact of
    state income taxes.

    Liquidity and Capital Resources

        Consolidated working capital was $202.3 million at September 27,
    1997, compared with $127.9 million at September 28, 1996. Included in
    working capital are cash, cash equivalents, and available-for-sale
    investments of $153.2 million at September 27, 1997, compared with
    $95.6 million at September 28, 1996. Of the $153.2 million balance at
    September 27, 1997, $139.9 million was held by the Company's
    majority-owned subsidiaries, and the remainder was held by the Company
    and its wholly owned subsidiary.
        Net cash used in operating activities during fiscal 1997 was
    $14.1 million. An increase in accounts receivable, primarily at Trex
    Medical, used $19.7 million in cash. The increase at Trex Medical was
    primarily due to increased sales in fiscal 1997 compared with fiscal 1996
    and, to a lesser extent, longer customer payment patterns. Trex Medical
    expects to improve cash flow by increasing adherence to its commercial
    terms in fiscal 1998. In addition, an increase in inventories and
    unbilled contract costs and fees used $11.3 million in cash, primarily in
    support of increased sales and new product introductions at Trex Medical.
    These uses of cash were offset in part by $11.2 million provided by an
    increase in other current liabilities, due in part to an increase in
    income taxes payable.
        Excluding available-for-sale investments activity, the Company's
    primary investing activities during fiscal 1997 included capital
    expenditures and an acquisition. The Company expended $26.9 million for
    property, plant, and equipment and $10.7 million, net of cash acquired,
    for the acquisition of CCS (Note 3).
        In connection with certain of ThermoLase's joint venture
    arrangements, ThermoLase provided funding of $1.1 million during fiscal
    1997 and $1.7 million in October 1997. ThermoLase has agreed to provide

                                       39PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                     Management's Discussion and Analysis of
                  Financial Condition and Results of Operations

    Liquidity and Capital Resources (continued)

    additional funding of up to approximately $5.4 million under these
    arrangements.
        The Company's financing activities provided $111.0 million of cash
    during fiscal 1997. In August 1997, ThermoLase sold at par value $115.0
    million principal amount of 4 3/8% subordinated convertible debentures
    due 2004 (Note 8). To finance the acquisition of CCS, the Company
    borrowed $11.0 million from Thermo Electron (Note 7). The Company raised
    $16.4 million from the sale of Company and subsidiary common stock (Note
    10). 
        In November 1997, the Company sold at par value $124.5 million
    principal amount of 3 1/4% subordinated convertible debentures due 2007
    (Note 15).
        In September 1996 and April 1997, ThermoLase's Board of Directors
    authorized the repurchase by ThermoLase of up to $20.0 million of its
    common stock through various dates ending April 1998, in the open market,
    in negotiated transactions, or pursuant to the exercise by investors of
    standardized put options written on its common stock. In September 1997,
    ThermoLase's Board of Directors authorized the repurchase by ThermoLase,
    through September 4, 1998, of up to an additional 1,000,000 shares of its
    common stock. During fiscal 1997, ThermoLase repurchased 1,869,200 shares
    of its common stock for $26.1 million. As of September 27, 1997,
    authorization to repurchase up to an additional 644,016 shares remained
    outstanding.
        In November 1997, the Company's Board of Directors authorized the
    repurchase by the Company of up to $20.0 million of its common stock,
    through November 1998, in the open market or in negotiated transactions.
        In October 1997, Trex Medical acquired substantially all of the
    assets, subject to certain liabilities, of Digitec Corporation, a North
    Carolina-based manufacturer of physiological-monitoring equipment and
    digital-image archiving and networking systems used in cardiac
    catheterization procedures, for approximately $7.2 million in cash,
    subject to a post-closing adjustment.
        In April 1997, ThermoLase completed an exchange offer whereby it
    issued 2,000,000 units, each consisting of one share of ThermoLase common
    stock and one redemption right, in exchange for 2,261,706 shares of
    existing ThermoLase common stock and $502,000 in cash, net of expenses
    (Note 1).
        ThermoLase has signed a lease for one additional Spa Thira, which it
    expects to open in fiscal 1998. Depending on its size, a spa generally
    requires approximately $1.5 million to $2.5 million for such items as
    leasehold improvements and laser systems. ThermoLase expects to
    concentrate its resources on increasing the capacity utilization of its
    existing U.S. spas and expanding its physicians' licensing program and
    international licensing arrangements. Construction will begin on new spas
    at such time as the existing spas produce improved results from
    operations. ThermoLase also expects to expend $8.0 million to $9.0
    million during fiscal 1998 for equipment related to its licensing
    programs. ThermoLase's capital expenditures will primarily be affected by
    the number of Spa Thira locations that are developed and the number of

                                       40PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                     Management's Discussion and Analysis of
                  Financial Condition and Results of Operations

    Liquidity and Capital Resources (continued)

    physicians and other domestic and international licensees engaged in its
    licensing programs. In addition, the Company plans to make capital
    expenditures of approximately $8.0 million for its other businesses
    during fiscal 1998. The Company expects that it will finance growth at
    its majority-owned and wholly owned subsidiary through a combination of
    internal funds, additional debt or equity financing, and/or short-term
    borrowings from Thermo Electron, although it has no agreement to ensure
    that funds will be available from Thermo Electron on acceptable terms or
    at all. The Company believes its existing resources are sufficient to
    meet the capital requirements of its existing operations for the
    foreseeable future.

                                       41PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                           Forward-looking Statements

        In connection with the "safe harbor" provisions of the Private
    Securities Litigation Reform Act of 1995, the Company wishes to caution
    readers that the following important factors, among others, in some cases
    have affected, and in the future could affect, the Company's actual
    results and could cause its actual results in fiscal 1998 and beyond to
    differ materially from those expressed in any forward-looking statements
    made by, or on behalf of, the Company. 

        No Assurance of Development and Commercialization of Products Under
    Development. The Company has several lines of existing products and a
    number of commercial products under development. Product development
    involves a high degree of risk, and returns to investors are dependent
    upon successful development and commercialization of the Company's
    proposed products. Proposed products based on the Company's technologies
    will require significant research and development. There can be no
    assurance that any products developed by the Company will be
    commercialized or that development will be completed in any particular
    time frame. In addition, there can be no assurance that the Company will
    be able to build manufacturing, marketing, and distribution organizations
    that will be necessary for the successful commercialization of its
    commercial products under development.
        The Company has developed several of its core technologies in
    connection with government-sponsored research and development. The
    Company is seeking government funding for further applications of certain
    of its core technologies, but there can be no assurance that such funding
    can be obtained on favorable terms, if at all. In addition, the Company
    does not expect that government funding will be sufficient to complete
    the development of the Company's proposed commercial products. In order
    to further or complete the development of its commercial products, the
    Company may seek to raise additional funds for specific projects or for
    subsidiaries of the Company that will commercialize its products. There
    can be no assurance that funding for further development of the Company's
    commercial products can be obtained on favorable terms, if at all.

        Uncertain Market Acceptance. The success of the Company's products
    depends on obtaining favorable perceptions of the Company's products by
    markets and opinion leaders. Laser-based hair removal is significantly
    different from traditional hair-removal technologies. With any new
    cosmetic technology, there is substantial risk that the marketplace may
    not accept or be receptive to the potential benefits of such technology.
    Market acceptance of the SoftLight process will depend, in large part,
    upon the ability of ThermoLase to demonstrate to consumers the safety and
    effectiveness of the SoftLight process and its advantages over other
    types of hair-removal treatment, including other laser-based systems.
    There can be no assurance that the SoftLight process will be accepted by
    the general public. The Company's laser communication technology,
    ThermoLase's SoftLight Rejuvenation(TM) laser system, and Trex Medical's
    full-field digital imaging system are also significantly different from
    current technologies and, if successfully developed, will be subject to
    similar market acceptance risks.

                                       42PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                           Forward-looking Statements

        Government Regulation; No Assurance of Regulatory Approvals. Certain
    of the Company's products are subject to pre-marketing clearance or
    approval by the U.S. Food and Drug Administration (FDA) and similar
    agencies in foreign countries. The use or sale of certain of the
    Company's commercial products under development will require approvals by
    other government agencies, such as the Federal Aviation Administration.
    In December 1997, Trex Medical submitted a 510(k) application for FDA
    clearance for its full-field digital mammography system. The process of
    obtaining FDA clearance is time consuming and expensive. Full-field
    digital mammography has not been classified and there can be no assurance
    that the FDA will accept such 510(k) application; the FDA may require
    additional data or alternative and more time-consuming approval
    procedures. Furthermore, there can be no assurance that the necessary
    clearance or approval for the product will be obtained on a timely basis,
    or at all.
        FDA regulations also require continuing compliance with specific
    standards in conjunction with the maintenance and marketing of products
    and services that have been approved or cleared. Failure to comply with
    applicable regulatory requirements can result in, among other things,
    civil and criminal penalties, suspension of approvals, recalls, or
    seizures of products, injunctions, and criminal prosecutions.
        The extent to which a physician must be involved in the performance
    of the SoftLight laser hair-removal procedure, including his or her
    ability to delegate to non-physicians the responsibility for providing
    particular services, depends upon applicable state and foreign law and
    regulations. Some regulatory authorities that have considered the
    question have determined that the use of lasers for hair removal
    constitutes the practice of medicine and have limited the right to
    perform laser hair-removal procedures to physicians, or imposed
    restrictions on the conditions under which a physician may delegate to a
    non-physician responsibility for performing laser hair-removal
    procedures. The use of lasers for hair removal is a new use for lasers,
    and there can be no assurance that review of the Company's business,
    structures and relationships relating to its SoftLight hair removal
    procedures by courts or regulatory authorities having jurisdiction over
    matters including, without limitation, the practice of medicine, the
    licensure of facilities, equipment or personnel, and franchising, will
    not result in determinations that could adversely affect the operations
    of the Company, or that interpretations of current laws and regulations
    or changes in current laws and regulations will not make such compliance
    more difficult or expensive. There can be no assurance that state
    regulatory authorities will not (i) require a physician to evaluate each
    person for whom laser hair-removal procedures are performed, (ii) require
    a supervising physician to be present at all times at the site where
    laser hair-removal procedures are performed, (iii) prohibit anyone other
    than a physician from using a laser for hair removal, or (iv) impose
    other requirements relating to the supervision of persons performing
    laser hair-removal procedures or the qualifications and/or training of
    such persons. Any of these actions could add significant cost to
    ThermoLase's spa operations and increase the cost to physicians under
    ThermoLase's licensing program.

                                       43PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                           Forward-looking Statements

        Although the optical frequencies used by the Company's lasercom
    technology are not currently regulated by the Federal Communications
    Commission, there can be no assurance that such frequencies will not be
    regulated in the future nor can there be any assurance that, if
    regulated, that the Company's products and services would conform to such
    regulations or that future products will not be regulated.

        Healthcare Reform; Uncertainty of Patient Reimbursement. The federal
    government has in the past and may in the future consider, and certain
    state and local as well as a number of foreign governments are
    considering or have adopted, healthcare policies intended to curb rising
    healthcare costs. Such policies include rationing of government-funded
    reimbursement for healthcare services and imposing price controls upon
    providers of medical products and services. The Company cannot predict
    what healthcare reform legislation or regulation, if any, will be enacted
    in the United States or elsewhere. Significant changes in the healthcare
    systems in the United States or elsewhere are likely to have a
    significant impact over time on the manner in which the Company conducts
    its business. In addition, the federal government regulates reimbursement
    of fees for certain diagnostic examinations and capital equipment
    acquisition costs connected with services to Medicare beneficiaries. Cost
    containment policies may have the effect of reducing reimbursement for
    certain procedures, and as a result may inhibit or reduce demand by
    healthcare providers for products in the markets in which the Company
    competes. While the Company cannot predict what effect the policies of
    government entities and other third-party payors will have on future
    sales of the Company's products, there can be no assurance that such
    policies would not have an adverse impact on the operations of the
    Company.

        Need for Continued Product Development. ThermoLase continues to study
    the SoftLight hair-removal process to better understand the effects of
    the system and to modify the system in order to increase its
    effectiveness and the length of time between treatments. The Company has
    developed a modification to its procedure, SoftLight 2.0, that has had
    positive clinical laboratory results, and began introducing this
    procedure, in its spas and to its licensees in September 1997. Results
    are preliminary and there can be no assurance that SoftLight 2.0 will be
    successful in improving the hair-removal process. Failure to further
    improve the SoftLight process may limit ThermoLase's ability to
    successfully commercialize the SoftLight process. The Company has also
    developed a skin-resurfacing process, the SoftLight Rejuvenation (TM)
    Laser system, intended for wrinkle- and skin-texture treatment, but there
    is no assurance that this system will not require additional development
    in order to be marketed successfully.
        A number of the Company's other potential products are currently
    under development. There are a number of technological challenges that
    the Company must successfully address to complete any of its development
    efforts. Proposed products based on the Company's technologies will
    require significant additional research and development, as well as
    successful efforts to commercialize such products. There can be no
    assurance that any of the products currently being developed by the

                                       44PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                           Forward-looking Statements

    Company, or those to be developed in the future by the Company, will be
    technologically feasible or accepted by the marketplace, or that any such
    development will be completed in any particular time frame.
        The telecommunications industry is subject to rapid and substantial
    technological change, evolving industry standards and improvements in and
    expansion of telecommunications product and service offerings. The
    development and commercialization of new technologies and the
    introduction of new products and services can render existing products
    and services obsolete or unmarketable. There can be no assurance that
    Trex Communications will be successful in selecting, developing,
    manufacturing, and marketing lasercom products or enhancing its existing
    products or that developments by others will not render its products or
    technologies obsolete or noncompetitive. Moreover, a number of the
    commercial markets for Trex Communication's technology have only recently
    begun to develop. If these markets fail to grow, or grow more slowly than
    anticipated, the Company's business and operating results could be
    materially adversely affected.

        Intense Competition. The Company expects that, in the near term, the
    principal competitors for ThermoLase, relative to its SoftLight hair-
    removal treatment, will be electrolysis providers. Although the Company
    believes that it has a significant competitive advantage over
    electrolysis, it does not have the well-established network of client
    relationships that many electrologists have. Over time, the Company
    expects that ThermoLase will face growing competition from other
    laser-based hair-removal companies. If the SoftLight technology is widely
    accepted by the general public, the Company expects that others, in
    addition to the four laser companies that currently have clearance for
    hair removal, will seek to develop and commercialize similar technologies
    and products that may compete directly with the SoftLight system. The
    Company's products and services will also compete with other hair-removal
    products and methods. The Company has developed a modification to its
    procedure, SoftLight 2.0, that has had positive clinical laboratory
    results, and began introducing this procedure in its spas and to its
    licensees in September 1997. Results are preliminary and there can be no
    assurance that SoftLight 2.0 will be successful in improving the
    hair-removal process. Failure to further improve the SoftLight process
    may limit ThermoLase's ability to successfully commercialize the
    SoftLight process. In addition, although ThermoLase has not observed any
    significant side effects to date, it is continuing to monitor subjects
    and customers for the development of possible side effects. In addition,
    should it receive clearance to market the SoftLight Rejuvenation Laser
    system for skin resurfacing, the Company expects that its principal
    competitors will be providers of carbon dioxide laser and chemical peel
    resurfacing and traditional spa-based services.
        Trex Medical encounters and expects to continue to encounter intense
    competition in the sale of its products. The Company believes that the
    principal competitive factors affecting the market for its products
    include product features, product performance and reputation, price, and
    service. Trex Medical's competitors may have greater financial,
    marketing, and other resources than the Company. As a result, they may be
    able to adapt more quickly to new or emerging technologies and changes in

                                       45PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                           Forward-looking Statements

    customer requirements, or to devote greater resources to the promotion
    and sale of the products than the Company. Moreover, the products sold by
    the Company's OEM customers compete with products offered by the Company
    directly and its through independent dealers. Competition could increase
    if new companies enter the market or if existing competitors expand their
    product lines or modify existing product lines. There can be no assurance
    that the Company's current products, products under development, or
    ability to discover new technologies will be sufficient to enable it to
    compete effectively with its competitors. 
        Trex Communications is engaged in segments of the telecommunications
    industry that are extremely competitive. The Company expects that its
    lasercom technology will compete with large telecommunication service
    providers such as the regional Bell operating companies and microwave and
    cellular companies. Both the Company's lasercom division and CCS
    subsidiary will compete directly with telecommunications hardware and
    software providers. There can be no assurance that Trex Communications
    will be able to compete successfully with existing or new competitors.

        Need to Manage Growth; Ability to Attract Qualified Personnel.
    ThermoLase is experiencing a period of rapid growth as it commences
    commercial operations of its SoftLight process. ThermoLase presently
    intends to commercialize the SoftLight process primarily through
    affiliated spas and a network of physicians using the process as part of
    their practices. ThermoLase will be required to recruit and train a large
    number of personnel for its spas, including medical staff such as
    physicians, registered nurses, physician assistants, or other personnel.
    There may be only a limited number of such persons with the requisite
    skills, and it may become increasingly difficult for ThermoLase to hire
    such personnel over time. ThermoLase will also be required to recruit
    qualified physicians for its network of physician practices that offer
    the SoftLight process. Such qualified physicians may not be available or
    interested in offering the SoftLight process in their private practices.
    ThermoLase's commercialization strategy may also significantly strain
    operational, management, financial, sales and marketing, and other
    resources. To manage growth effectively, ThermoLase must continue to
    enhance its systems and controls and successfully expand, train, and
    manage its employee base and physician network. There can be no assurance
    that ThermoLase will be able to manage this expansion effectively. Trex
    Communications is currently searching for a chief executive officer who
    will develop a commercialization and marketing plan for its lasercom
    technology. No assurance can be given that Trex Communications will
    successfully identify and attract a qualified chief executive officer,
    that such person will be able to devise successful commercialization and
    marketing strategies or attract additional personnel necessary to
    successfully implement such strategies.

        Intellectual Property Rights, Uncertainties and Litigation. The
    Company places considerable importance on obtaining patent and trade
    secret protection for significant new technologies, products, and
    processes because of the length of time and expense associated with
    bringing new products through development and the regulatory approval
    process to the marketplace. Proprietary rights relating to the Company's

                                       46PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                           Forward-looking Statements

    products will be protected from unauthorized use by third parties only to
    the extent that they are covered by enforceable patents or are maintained
    in confidence as trade secrets. Certain technology that may be used in
    the Company's products is not covered by any patent or patent application
    and, therefore, may be the subject of ownership disputes. The Company
    generally relies on trade secrecy agreements to protect such technology,
    but there can be no assurance that such agreements will provide
    meaningful protection or that others will not independently develop
    substantially equivalent technology. There can be no assurance that
    patent applications covering the Company's products will be successfully
    filed or that patents will ultimately issue. Further, even if patents are
    issued, the protection afforded by such patents and the Company's
    existing patents will depend upon their scope and validity. In addition,
    there can be no assurance that the Company's patents will not be
    challenged. There may be patents or other intellectual property rights
    owned by others, which if infringed by the Company would permit the owner
    to prevent the Company from making, selling, or using the affected
    product or process and to be entitled to damages for past infringement.
    ThermoLase has from time to time received allegations that the SoftLight
    process infringes the intellectual property rights of others and may
    continue to receive such allegations in the future.  Protection and
    defense of intellectual property rights may involve the commitment of
    large amounts of time and financial resources. Furthermore, the
    government retains a non-exclusive, royalty-free license to use
    technology developed under government contracts, for government purposes.
    If the Company decides not to pursue further development of
    government-sponsored technology, the government could, in certain
    circumstances, transfer that technology to a third party.
        Fischer Imaging Corporation (Fischer) sued Trex Medical's Lorad
    division in April 1992, alleging that Lorad's prone breast-biopsy systems
    infringe a Fischer patent on a precision mammographic needle-biopsy
    system. As of September 27, 1997, Trex Medical had aggregate revenues of
    approximately $107.1 million from the sale of such systems. The suit
    requests a permanent injunction, treble damages, and attorney's fees and
    expenses. As of September 27, 1997, Trex Medical had accrued a reserve of
    approximately $2 million in connection with this matter, although given
    the inherent uncertainty of patent litigation and disputes, no assurance
    can be given as to the amount which the Company may eventually be
    required to pay in expenses, or in damages, if the Company is
    unsuccessful in defending this matter.

        Potential Product Liability. The administration of medical treatments
    is subject to various risks of physical injury to the patient. The
    Company maintains product liability insurance, but there is no assurance
    that this insurance will provide sufficient coverage in the event of a
    claim. Furthermore, there can be no assurance that the Company will be
    able to maintain its insurance coverage or that insurance coverage will
    continue to be available at economically feasible rates.

        Dependence Upon Significant Relationships. A significant portion of
    Trex Medical's sales are through OEM arrangements with United States
    Surgical Corporation and General Electric Company. Trex Medical's and

                                       47PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                           Forward-looking Statements

    Trex Communications' sales depend, in part, on the continuation of these
    arrangements and the level of end-user sales by such OEMs and VARs. There
    can be no assurance that Trex Medical and Trex Communications will be
    able to maintain existing, or establish new, relationships. A significant
    portion of Trex Communication's call-automation revenues are derived from
    large call-automation system installations and customization projects at
    customer sites. There can be no assurance that the Company will sell
    additional systems to these customers or have the ability to replace
    these revenues with comparably sized projects in the future. Trex
    Communications' lasercom division plans to develop strategic
    relationships with telecommunications product and service providers to
    provide components for the network systems which lasercom is developing
    and to market and sell lasercom technology and services. There can be no
    assurance that Trex Communications will be able to develop such strategic
    relationships in the future or that it will benefit from any of such
    arrangements.

        Risks Associated with Acquisition Strategy. The Company's strategy
    includes the acquisition of businesses that complement or augment the
    Company's existing products and services. Promising acquisitions are
    difficult to identify and complete for a number of reasons, including
    competition among prospective buyers and the need for regulatory
    approvals, including antitrust approvals. Any acquisitions completed by
    the Company may be made at substantial premiums over the fair value of
    the net assets of the acquired companies. There can be no assurance that
    the Company will be able to complete future acquisitions or that the
    Company will be able to successfully integrate any acquired businesses.

        Risks Associated with Spinout of Subsidiaries. The Company has
    adopted a strategy of spinning out certain of its businesses into
    separate subsidiaries and having these subsidiaries sell a minority
    interest to outside investors. As a result of the sale of stock by
    subsidiaries and similar transactions, the Company records gains that
    represent the increase in the Company's net investment in the
    subsidiaries. These gains have represented a substantial portion of the
    net income reported by the Company in certain periods. The size and
    timing of these transactions are dependent on market and other conditions
    that are beyond the Company's control. Accordingly, there can be no
    assurance that the Company will be able to generate gains from such
    transactions in the future.
        In addition, in October 1995, the Financial Accounting Standards
    Board (FASB) issued an exposure draft of a Proposed Statement of
    Financial Accounting Standards, "Consolidated Financial Statements:
    Policy and Procedures" (Proposed Statement). The Proposed Statement would
    establish new rules for how consolidated financial statements should be
    prepared. If the Proposed Statement is adopted, there could be
    significant changes in the way the Company records certain transactions
    of its controlled subsidiaries. Among those changes, any sale of the
    stock of a subsidiary that does not result in a loss of control would be
    accounted for as a transaction in equity of the consolidated entity with
    no gain or loss being recorded. The exposure draft addresses the
    consolidation issues in two parts, consolidation procedures, which

                                       48PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

                           Forward-looking Statements

    includes proposed rule changes affecting the Company's ability to
    recognize gains on issuance of subsidiary stock, and consolidation policy
    which does not address accounting for such gains. During fiscal 1997, the
    FASB decided to focus its efforts on the consolidation policy part of the
    exposure draft and to consider resuming discussion on consolidation
    procedures after completion of the efforts on consolidation policy. The
    timing and contents of any final statement is uncertain. 

                                       49PAGE
<PAGE>
   ThermoTrex Corporation                            1997 Financial Statements

                         Selected Financial Information

                                                    Nine
                                                   Months
                               Year Ended         Ended (a)   Year Ended
                    ----------------------------- ---------  ----------------
   (In thousands                                      
   except per       Sept. 27, Sept. 28, Sept. 30, Sept. 30,  Dec. 31, Jan. 1,
   share amounts)     1997(b)   1996(c)      1995   1995(d)   1994(e)    1994
   -------------------------------------------------------   -------  -------
                                       (Unaudited)
   Statement of Income Data:
   Revenues          $282,121  $182,029  $111,610 $ 86,531  $ 91,052 $ 54,329
   Income before
     provision for
     income taxes
     and minority
     interest          10,618    48,292    38,895   37,891    11,542    1,490
   Net income           8,441    42,575    36,658   36,341     9,602      495
   Earnings per share     .44      2.16      1.94     1.92       .50      .03
   Balance Sheet Data:
   Working capital   $202,276  $127,863           $103,297  $ 82,798 $ 45,103
   Total assets       450,117   320,222            230,781   154,984  117,335
   Long-term 
     obligations      115,000         -                  -         -        -
   Common stock of
     subsidiary 
     subject to
     redemption        40,500         -                  -         -   14,511
   Shareholders'
     investment       176,135   205,079            162,388   123,271   77,594

   (a)In September 1995, the Company changed its fiscal year end from the
      Saturday nearest December 31 to the Saturday nearest September 30.
      Accordingly, the Company's 39-week transition period ended September
      30, 1995, is presented.
   (b) Reflects the July 1997 acquisition of CCS and sales of Trex Medical and
      Trex Communications common stock, which resulted in nontaxable gains of
      $7.9 million. Also reflects the issuance by ThermoLase of $115.0
      million principal amount of 4 3/8% subordinated convertible debentures,
      the issuance of an $11.0 million promissory note to Thermo Electron,
      and the reclassification of $40.5 million to "Common stock of
      subsidiary subject to redemption" from "Shareholders' investment" and
      "Minority interest" due to ThermoLase's stock exchange transaction.
   (c) Reflects the May 1996 and September 1996 acquisitions of XRE and
      Continental, respectively, and Trex Medical's private placements,
      initial public offering, and rights offering, which resulted in
      nontaxable gains of $39.1 million.
   (d)Reflects ThermoLase's 1995 private placements and public offering,
      which resulted in nontaxable gains of $34.7 million, and the September
      1995 acquisition of Bennett.
   (e)Reflects the net proceeds of the Company's 1994 public offering and
      ThermoLase's 1994 initial public offering, which resulted in a
      nontaxable gain of $8.6 million.

                                       50PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

    Common Stock Market Information
        The following table shows the market range for the Company's common
    stock based on reported sales prices on the American Stock Exchange
    (symbol TKN) for fiscal 1997 and fiscal 1996.

                                Fiscal 1997               Fiscal 1996
                           ---------------------     ---------------------
    Quarter                  High          Low         High          Low
    ----------------------------------------------------------------------
    First                  $42  1/4      $28 1/4     $50 5/8       $31 1/2
    Second                  31  1/4       22 1/2      50 7/8        41 3/8
    Third                   28  7/8       17 7/8      50 1/8        42 3/4
    Fourth                  28            21 3/4      51 3/8        36 5/8

        As of October 31, 1997, the Company had 631 holders of record of its
    common stock. This does not include holdings in street or nominee names.
    The closing market price on the American Stock Exchange for the Company's
    common stock on October 31, 1997, was $23 per share.
        Common stock of certain of the Company's majority-owned public
    subsidiaries is traded on the American Stock Exchange: ThermoLase
    Corporation (TLZ) and Trex Medical Corporation (TXM).

    Stock Transfer Agent
        American Stock Transfer & Trust Company is the stock transfer agent
    and maintains shareholder activity records. The agent will respond to
    questions on issuance of stock certificates, change of ownership, lost
    stock certificates, and change of address. For these and similar matters,
    please direct inquiries to:

         American Stock Transfer & Trust Company
         Shareholder Services Department
         40 Wall Street, 46th Floor
         New York, New York 10005
         (718) 921-8200

    Shareholder Services
        Shareholders of ThermoTrex Corporation who desire information about
    the Company are invited to contact John N. Hatsopoulos, Chief Financial
    Officer and Vice President, ThermoTrex Corporation, 81 Wyman Street, P.O.
    Box 9046, Waltham, Massachusetts 02254-9046, (781) 622-1111. A mailing
    list is maintained to enable shareholders whose stock is held in street
    name, and other interested individuals, to receive quarterly reports,
    annual reports, and press releases as quickly as possible. Quarterly
    distribution of printed reports is limited to the second quarter report
    only. All quarterly reports and press releases are available through the
    Internet from Thermo Electron's home page (http://www.thermo.com/subsid/
    tkn.html).

                                       51PAGE
<PAGE>
    ThermoTrex Corporation                          1997 Financial Statements

    Dividend Policy
        The Company has never paid cash dividends and does not expect to pay
    cash dividends in the foreseeable future because its policy has been to
    use earnings to finance expansion and growth. Payment of dividends will
    rest within the discretion of the Board of Directors and will depend
    upon, among other factors, the Company's earnings, capital requirements,
    and financial condition.

    Form 10-K Report
        A copy of the Annual Report on Form 10-K for the fiscal year ended
    September 27, 1997, as filed with the Securities and Exchange Commission,
    may be obtained at no charge by writing to John N. Hatsopoulos, Chief
    Financial Officer and Vice President, ThermoTrex Corporation, 81 Wyman
    Street, P.O. Box 9046, Waltham, Massachusetts 02254-9046.

    Annual Meeting
        The annual meeting of shareholders will be held on Thursday, March 5,
    1998, at 10:00 a.m., at the Westin Hotel, 70 Third Avenue, Waltham,
    Massachusetts.


                                                                    Exhibit 21

                             THERMOTREX CORPORATION

                         Subsidiaries of the Registrant


   At October 31, 1997, ThermoTrex Corporation owned the following companies:

                                                                  Registrant's
                                           State of Jurisdiction      % of
   Name                                       or Incorporation       Ownership
   ---------------------------------------------------------------------------
   Trex Medical Corporation                        Delaware             79
     Bennett X-Ray Corporation                     New York            100
       Bennett International Corporation      U.S. Virgin Islands      100
       Eagle X-Ray, Inc.                           New York            100
       Island X-Ray Incorporated                   New York            100
     Continental X-Ray Corporation                 Delaware            100
     Thermo Lorad F.S.C. Inc.                 U.S. Virgin Islands      100
     XRE Corporation                               Delaware            100
   ThermoLase Corporation                          Delaware             67
     CBI Laboratories, Inc.                          Texas             100
     ThermoLase Australia L.L.C.                   Delaware            100
     ThermoLase France L.L.C.                      Delaware             50
       ThermoDess S.A.S.                            France              50
     ThermoLase England L.L.C.                     Delaware             50
       ThermoLase UK Limited                    United Kingdom         100
     ThermoLase Japan L.L.C.                        Wyoming             50
       Thira Japan, Inc.                             Japan             100
   ThermoTrex East, Inc.                         Massachusetts         100
   Trex Communications Corporation                 Delaware             78
     Computer Communcations Specialists, Inc.       Georgia            100
       Computer Communications Specialists
        UK Ltd.                                 United Kingdom         100






                                                                   Exhibit 23

                    Consent of Independent Public Accountants

        As independent public accountants, we hereby consent to the
    incorporation by reference of our reports dated November 3, 1997,
    included in or incorporated by reference into ThermoTrex Corporation's
    Annual Report on Form 10-K for the year ended September 27, 1997, into
    the Company's previously filed Registration Statement No. 33-47846 on
    Form S-3, Registration Statement No. 33-45282 on Form S-8, Registration
    Statement No. 33-45284 on Form S-8, Registration Statement No. 33-52818
    on Form S-8, Registration Statement No. 33-68654 on Form S-3,
    Registration Statement No. 33-69426 on Form S-3, Registration Statement
    No. 33-70512 on Form S-8, Registration Statement No. 33-80891 on Form
    S-8, and Registration Statement No. 333-34909 on Form S-3.

                                                     Arthur Andersen LLP

    Boston, Massachusetts
    December 3, 1997





<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THERMOTREX
CORPORATION'S ANNUAL REPORT ON FORM 10-K FOR THE YEAR ENDED SEPTEMBER 27, 1997
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          SEP-27-1997
<PERIOD-END>                               SEP-27-1997
<CASH>                                         135,720
<SECURITIES>                                    17,499
<RECEIVABLES>                                   60,601
<ALLOWANCES>                                     1,969
<INVENTORY>                                     48,204
<CURRENT-ASSETS>                               280,005
<PP&E>                                          67,957
<DEPRECIATION>                                  15,568
<TOTAL-ASSETS>                                 450,117
<CURRENT-LIABILITIES>                           77,729
<BONDS>                                        115,000
                                0
                                          0
<COMMON>                                           193
<OTHER-SE>                                     175,942
<TOTAL-LIABILITY-AND-EQUITY>                   450,117
<SALES>                                        265,947
<TOTAL-REVENUES>                               282,121
<CGS>                                          168,469
<TOTAL-COSTS>                                  180,136
<OTHER-EXPENSES>                                33,467
<LOSS-PROVISION>                                   279
<INTEREST-EXPENSE>                                 835
<INCOME-PRETAX>                                 10,618
<INCOME-TAX>                                     3,474
<INCOME-CONTINUING>                              8,441
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     8,441
<EPS-PRIMARY>                                      .44
<EPS-DILUTED>                                        0
        


</TABLE>


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