THERMO INSTRUMENT SYSTEMS INC
10-K, 1996-03-13
MEASURING & CONTROLLING DEVICES, NEC
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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 December 30, 1995

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

                          Commission file number 1-9786

                         THERMO INSTRUMENT SYSTEMS INC.
             (Exact name of Registrant as specified in its charter)
   Delaware                                                        04-2925809 
   (State or other jurisdiction of                           (I.R.S. Employer 
   incorporation or organization)                          Identification No.)

   504 Airport Road, Post Office Box 2108
   Santa Fe, New Mexico                                            87504-2108 
   (Address of principal executive offices)                         (Zip Code)
       Registrant's telephone number, including area code: (617) 622-1000

           Securities registered pursuant to Section 12(b) of the Act:
                                                         Name of each exchange
   Title of each class                                     on which registered
   ----------------------------                        -----------------------
   Common Stock, $.10 par value                        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 January 26, 1996, was approximately $345,740,000.

   As of January 26, 1996, the Registrant had 91,682,067 shares of Common
   Stock outstanding.
                       Documents Incorporated by Reference
   Portions of the Registrant's Annual Report to Shareholders for the year
   ended December 30, 1995, 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 May 19, 1996, are incorporated by
   reference into Part III.
PAGE
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                                    PART I


  Item 1.  Business

  (a)  General Development of Business.

       Thermo Instrument Systems Inc. (the Company or the Registrant) is a
  worldwide leader in the development, manufacture, and marketing of
  analytical, monitoring, process control, and imaging, inspection, and
  measurement instruments used to identify and analyze air pollution,
  radioactivity, complex chemical compounds, toxic metals, and other elements
  in a broad range of liquids and solids, as well as to control, monitor,
  image, inspect, and measure various industrial processes and life sciences
  phenomena. Through its 72%-owned ThermoSpectra Corporation (ThermoSpectra)
  subsidiary, the Company develops, manufactures, and markets precision
  imaging, inspection, and measurement instrumentation that employ a variety
  of energy sources or signals as well as high-speed data acquisition and
  digital processing technologies. Through its 80%-owned Thermo BioAnalysis
  Corporation (Thermo BioAnalysis) subsidiary, the Company develops,
  manufactures, and sells instrumentation for the analytical biochemistry,
  biopharmaceutical, and health physics instrumentation markets. Through its
  wholly owned Thermo Optek Corporation (Thermo Optek) subsidiary, the
  Company develops, manufactures, and markets optical and energy-based
  analytical instruments. These instruments are used in the quantitative and
  qualitative chemical analysis of elements and molecular compounds in a wide
  variety of solids, liquids, and gases. The Company's wholly owned
  ThermoQuest Corporation (ThermoQuest) subsidiary develops, manufactures,
  and sells mass spectrometers, liquid chromatographs, and gas chromatographs
  for the environmental, pharmaceutical, and industrial marketplaces. These
  analytical instruments are used in the quantitative and qualitative
  chemical analysis of organic and inorganic compounds at ultra-trace levels
  of detection.

       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 subsidiary through the establishment of subsidiary-level stock
  option incentive programs, as well as capital to support the subsidiaries'
  growth. In March and April 1995, Thermo BioAnalysis sold 1,601,500 shares
  of its common stock in private placements at $10.00 per share for net
  proceeds of $14.9 million. In August 1995, ThermoSpectra sold 1,725,000
  shares of its common stock in an initial public offering at $14.00 per
  share for net proceeds of $21.9 million. In October 1995, ThermoSpectra
  sold 202,000 shares of its common stock in a private placement at $15.72
  per share for net proceeds of $3.0 million.

       In August 1995, ThermoQuest sold $96.3 million principal amount of 5%
  subordinated convertible debentures due 2000 for net proceeds of $93.9
  million. In October 1995, Thermo Optek sold $96.3 million principal amount
  of 5% subordinated convertible debentures due 2000 for net proceeds of
  $93.9 million. The debentures issued by ThermoQuest and Thermo Optek are
  not convertible into common stock until after the issuing company completes
  an initial public offering of common stock. In February 1996, ThermoQuest
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  filed a registration statement with the Securities and Exchange Commission
  (SEC) covering shares of common stock to be offered in its initial public
  offering.

       Effective April 2, 1995, the Company and Thermo TerraTech Inc. (Thermo
  TerraTech) (formerly Thermo Process Systems Inc.) dissolved their Thermo
  Terra Tech joint venture. Thermo TerraTech then purchased the services
  businesses formerly operated by the joint venture from the Company for
  $34.3 million in cash. The Company owned 49% of the joint venture and
  accounted for its interest in the joint venture using the equity method.
  Prior to the joint venture's formation on April 2, 1994, the Company's
  services businesses comprised the Company's Services segment and were
  consolidated in the Company's financial statements. The sale of the
  businesses to Thermo TerraTech represents the Company's disposal of the
  operations that comprised its Services segment.

      The Company historically has expanded both through the acquisition of
  companies and product lines and through internal development of new
  products and technologies. During the past several years the Company has
  completed a number of complementary acquisitions that have provided
  additional technologies, specialized manufacturing or product development
  expertise, and broader capabilities in marketing and distribution. In
  19951, the Company's acquisitions included the assets of the Analytical
  Instruments Division of Baird Corporation, a wholly owned subsidiary of Imo
  Industries Inc., for $12.9 million in cash; Bakker Electronics Dongen B.V.
  for $2.3 million in cash; Gould Instrument Systems, Inc. for $25.8 million
  in cash, which includes the repayment of $6.0 million of bank debt;
  Euroglas B.V. for $0.9 million in cash; the assets of the Flow Automation
  Division of Galveston-Houston Company for $7.8 million in cash and the
  assumption of certain liabilities; and the Analytical Instrument Division
  of Analytical Technology, Inc. (ATI) for $43.3 million in cash, which
  includes the repayment of $7.0 million of bank debt, subject to
  post-closing adjustments. In February 1996, the Company acquired Dynatech
  Laboratories Worldwide (DLW) from Dynatech Corporation for approximately
  $43 million in cash, subject to post-closing adjustments. On March 1, 1995,
  the Company entered into an agreement with Fisons plc (Fisons) to acquire
  the Scientific Instruments Division of Fisons for approximately 202 million
  British pounds sterling. On April 13, 1995, the Company announced that it
  had received a "second request" for information regarding the transaction
  from the U.S. Federal Trade Commission (FTC). After extensive discussions
  with Fisons and the FTC, in January 1996 the Company withdrew its original
  pre-merger notification filing under the Hart-Scott-Rodino Antitrust
  Improvements Act (the HSR Act), and submitted a new filing with respect to
  a modified form of the acquisition. On February 15, 1996, the Company
  announced that the FTC had granted early termination of the waiting period
  under the HSR Act with respect to the modified acquisition and on March 1,
  1996, the Company announced that it had received clearance from U.K.
  antitrust regulatory authorities. The form of the acquisition cleared by
  the FTC and the U.K. authorities excludes from the businesses to be
  acquired by the Company substantially all of the mass spectrometer
  businesses of Fisons and a high-resolution mass spectrometer/inductively-
  coupled plasma (ICP) product. These businesses accounted for slightly less
  than 20% of the 1995 revenues of Fisons' Scientific Instruments Division.
  The new purchase price is expected to be slightly less than 150 million
  British pounds sterling, and will be subject to a post-closing adjustment 

  1 References to 1995, 1994, and 1993 herein are for the fiscal years ended
    December 30, 1995, December 31, 1994, and January 1, 1994, respectively.
                                        3PAGE
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  based on the net asset value of the acquired businesses as of the closing
  date. The modified acquisition is still subject to the consent of certain
  third parties and the satisfaction of other closing conditions. The
  Scientific Instruments Division of Fisons is principally composed of
  operations that are involved in the research, development, manufacture, and
  sale of analytical instruments to industrial and research laboratories
  worldwide. The Company intends to fund the purchase price of this
  acquisition from available cash and through borrowings from Thermo Electron
  Corporation (Thermo Electron).

       The Company was incorporated in Delaware in May 1986 as a wholly owned
  subsidiary of Thermo Electron to succeed the instruments businesses that
  were previously conducted by several Thermo Electron subsidiaries. As of
  December 30, 1995, Thermo Electron owned 78,459,585 shares, or 86%, of the
  Company's outstanding common stock. Thermo Electron is a manufacturer of
  biomedical products including heart-assist systems and mammography systems,
  paper-recycling and papermaking equipment, alternative-energy systems,
  industrial process equipment, and other specialized products. Thermo
  Electron also provides environmental and metallurgical services and
  conducts advanced technology research and development. 

       Thermo Electron intends, for the foreseeable future, to maintain at
  least 80% ownership of the Company, so that it may continue to file
  consolidated U.S. federal and state income tax returns with the Company.
  This may require the purchase by Thermo Electron of additional shares of
  common stock and/or convertible debentures of the Company from time to time
  as the number of outstanding shares of the Company increases. These and any
  other purchases may be made either on the open market or directly from the
  Company or pursuant to conversions of the Company's 3 3/4% senior
  convertible note due 2000 held by Thermo Electron. See Notes 5 and 11 to
  Consolidated Financial Statements in the Registrant's 1995 Annual Report to
  Shareholders for a description of the Company's outstanding stock options
  and convertible obligations. During 1995, Thermo Electron purchased
  2,864,000 shares of the Company's common stock on the open market at a
  total cost of $65.9 million. All share amounts have been restated to
  reflect a three-for-two stock split, effected in the form of a 50% stock
  dividend, which was distributed in April 1995, and a five-for-four stock
  split, effected in the form of a 25% stock dividend, which was distributed
  in December 1995.

  (b)  Financial Information About Industry Segments.

       The Company operates in one business segment: the manufacturing and
  marketing of analytical, monitoring, process control, and imaging,
  inspection, and measurement instruments used to identify and analyze air
  pollution, radioactivity, complex chemical compounds, toxic metals, and
  other elements in a broad range of liquids and solids, as well as to
  control, monitor, image, inspect, and measure various industrial processes
  and life sciences phenomena. Prior to April 4, 1994, the Company also
  provided environmental science and engineering services, laboratory-based
  testing, and nuclear physics services.
                                        4PAGE
<PAGE>
  (c)  Description of Business.

       (i)  Principal Products and Services

       The Company manufactures and markets instruments that employ a variety
  of advanced analytical techniques to determine the composition, structure,
  and physical properties of natural and synthetic substances. The Company's
  instruments are used for environmental and nuclear monitoring, process
  control, as well as imaging, inspection, and measurement.

       The Company has adopted Thermo Electron's spinout strategy in an
  effort to more clearly focus its many analytical technologies on their more
  specific niche markets. To date, the Company has completed an initial
  public offering of ThermoSpectra, has privately offered equity in Thermo
  BioAnalysis, and has privately sold convertible debentures in Thermo Optek
  and ThermoQuest. The debentures issued by ThermoQuest and Thermo Optek are
  not convertible into common stock until after the issuing company completes
  an initial public offering of common stock. ThermoQuest filed a
  registration statement with the SEC in February 1996 relating to its
  initial public offering of common stock.

       ThermoSpectra manufactures and markets precision imaging, inspection,
  and measurement instruments based on high-speed data acquisition and
  digital processing technologies to provide industrial and research
  customers with integrated systems that address their specific needs.
  ThermoSpectra's products include digital oscillographic recorders and data
  acquisition systems that continuously measure and monitor signals from
  various sensors; digital storage oscilloscopes (DSOs) that are capable of
  taking hundreds of millions of measurements per second of transient signals
  or short bursts of data; X-ray microanalyzers used as accessories to
  electron microscopes to provide elemental materials analysis as a
  supplement to the microscope's imaging capabilities; non-destructive X-ray
  inspection systems for process monitoring and quality control applications;
  and confocal laser scanning microscopes that use laser light to generate
  precise optical images primarily for life science applications.

       Thermo BioAnalysis develops, manufactures, and sells capillary
  electrophoresis systems, matrix-assisted laser desorption/ionization
  time-of-flight (MALDI-TOF) mass spectrometers, and health physics
  instrumentation. Capillary electrophoresis is a separation technique based
  on a combination of chromatographic and electroanalytical technologies and
  is particularly useful in biochemical, pharmaceutical, and environmental
  research. MALDI-TOF mass spectrometers measure the weight of the components
  of a sample and identify inorganic chemical components and/or inorganic
  elements contained within the sample. Thermo BioAnalysis' health physics
  division manufactures and sells radiation detection and counting
  instrumentation and sophisticated radiation monitoring systems to the
  nuclear industry throughout the world. Through the February 1996
  acquisition of DLW, Thermo BioAnalysis develops, manufactures, and sells
  immunoassay products. Immunoassay is an analytical method used for the
  qualitative and quantitative analysis of biological molecules. Immunoassay
  products are widely used in pharmaceutical and biopharmaceutical research,
  as well as for clinical testing of patient samples.

       Thermo Optek is a leader in the development, manufacture, and
  marketing of products used for both elemental and molecular analysis. These
  products are based on several optical spectroscopy techniques, including
  atomic emission (AE), atomic absorption (AA), and Fourier transform 
                                        5PAGE
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  infrared (FT-IR) and FT-Raman technologies. Thermo Optek's AE and AA
  spectrometers identify and measure trace quantities of metals and other
  elements in a wide variety of materials, including environmental samples
  (such as soil, water, and wastes), foods, drugs, cosmetics, and alloys.
  Thermo Optek sells its products to a range of customers in manufacturing
  industries such as producers of aircraft, automobiles and trucks,
  computers, chemicals, food, pharmaceuticals, and primary metals; in service
  industries such as waste management companies and commercial testing
  laboratories; and to government and university laboratories. Thermo Optek
  is a leading manufacturer of sequential AE spectrometers, in which elements
  are analyzed one at a time, and simultaneous AE spectrometers, in which
  many elements can be measured at the same time. The principal type of AE
  spectrometer used for elemental analysis of liquids is the ICP mass
  spectrometer (ICP/MS), which allows for simultaneous multi-element testing.
  Thermo Optek is a market and technology leader in ICP spectrometry and has
  developed the first ultratrace ICP spectrometer, the first ICP spectrometer
  to incorporate a solid state detector, and the first combined optical
  emission/mass spectrometer. Thermo Optek produces AA spectrometers in
  single-, double- and four-channel models. Thermo Optek is the only major
  producer of multichannel AA spectrometers, which provide several
  operational advantages over single-channel instruments, including speed of
  analysis, increased accuracy, reduced sample consumption, and analysis over
  an extended range of concentrations.

       Thermo Optek is a leading manufacturer of molecular analysis systems
  that use FT-IR and FT-Raman spectroscopic techniques. FT-IR and FT-Raman
  spectrometers are designed to nondestructively determine the chemical
  composition and physical properties of materials. These instruments are
  used in many areas of chemical research, industrial quality control, and
  process monitoring, and for solving a wide variety of materials-analysis
  problems. Thermo Optek offers a variety of models ranging from newly
  introduced models designed for routine applications to highly advanced
  research-grade FT-IR spectrometers.

       ThermoQuest is a leading manufacturer of commercial mass spectrometers
  and has pioneered many of the significant developments and applications of
  mass spectrometry. ThermoQuest's mass spectrometry products identify and
  measure the components of a sample for organic chemical compounds or for
  inorganic compounds. These instruments are used primarily by pharmaceutical
  companies for drug research, testing, and quality control; by environmental
  laboratories for testing water, air, and soil samples for compliance with
  environmental regulations; by chemical companies for research and quality
  control; by manufacturers for testing in certain industrial applications,
  such as the manufacture of semiconductor components, and for quality
  control; by food and beverage companies for quality control and to test
  product contamination; and in forensic applications. ThermoQuest provides
  both stand-alone mass spectrometers and combined systems that use its own
  chromatographs or those purchased from other companies. These products span
  a range of sensitivity, specificity, separation technologies, data-handling
  capabilities, sizes, and prices.

       ThermoQuest also manufactures high performance liquid chromatographs,
  gas chromatographs, and related instruments and equipment used principally
  in the research and development and production monitoring of
  pharmaceuticals and chemicals, and for environmental monitoring. These
  instruments separate the chemical components of substances for purposes of
  identification and measurement. Gas chromatographs and liquid
  chromatographs are widely used in environmental and industrial laboratories
                                        6PAGE
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  as stand-alone instruments or in conjunction with mass spectrometers, where
  the gas or liquid chromatograph separates a sample into individual chemical
  components for the mass spectrometer to identify. Applications include the
  identification of organic compounds, from pesticide residues on vegetables
  to chlorinated organics in drinking water. In 1995, ThermoQuest introduced
  its GCQ(TM) and LCQ(TM) benchtop gas chromatography/mass spectrometry and
  liquid chromatography/ mass spectrometry products. These systems are based
  on the Company's proprietary ion trap technology and are capable of
  multi-stage mass spectrometry.

       In other wholly owned businesses, the Company manufactures monitoring
  instruments for two principal markets: the detection and measurement of
  nuclear radiation, and the monitoring of air pollutants including toxic and
  combustible gases.

       The Company's nuclear radiation monitoring instruments detect and
  measure alpha, beta, gamma, neutron, and X-ray radiation emitted by natural
  sources and by radioactive materials used in nuclear power plants and
  certain governmental, industrial, and medical facilities. The Company is a
  leading manufacturer of a broad range of stand-alone and portable
  instruments and computer-integrated instrument systems used to ensure the
  safety of personnel from exposure to nuclear radiation. In addition, the
  Company is a major supplier of instruments and systems that are
  manufactured to European standards for personnel protection and
  environmental monitoring. The Company also manufactures industrial gauging
  and process control instruments used principally by manufacturers of flat
  sheet materials, including metals, plastics, rubber, paper, and fibers.

       The Company's air-monitoring instruments measure pollutants in ambient
  air and from stationary sources such as industrial smokestacks. The
  principal pollutants measured are oxides of nitrogen, sulfur dioxide,
  carbon monoxide, ozone, and volatile organic compounds (VOCs). These
  instruments are used by utility and industrial customers to ensure
  compliance with environmental regulations, by government agencies to
  monitor air quality, and by research facilities. The Occupational Safety
  and Health Administration's safety requirements for protecting workers from
  toxic or explosive atmospheres in confined spaces are addressed with the
  Company's detectors, instruments, and systems for sensing, monitoring, and
  warning of such dangers. These worker-safety products are used in a wide
  range of applications, from large petrochemical plants, utilities, and
  industrial manufacturing facilities to commercial buildings.

       The 1995 acquisition of the Analytical Instrument Division of ATI
  added to the Company's product offerings in several analytical areas,
  notably in ultraviolet visual spectrometry and thermogravimetric analysis
  (TGA). Ultraviolet visual spectrometry instruments are based upon the
  selective absorbence of ultraviolet radiation by various substances. An
  important use of ultraviolet instruments is the identification and
  determination of biologically active substances. These instruments are
  often used by life science researchers, pharmaceutical companies, and
  environmental testing laboratories. TGA systems are employed in the
  chemicals, plastics-polymers, and pharmaceutical industries for measuring
  changes in mass as a function of temperature. Specific fields which have
  widely used TGA include studies involving the thermal stability of
  minerals, pyrolysis of coals and petroleums, and thermochemical reactions
  of ceramics and cements.
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       In addition, the Company manufactures equipment that provides on-line,
  real-time analysis of elements in bulk raw materials, such as coal and
  cement. These analyzers are used by utilities to determine the sulfur
  content of coal to ensure compliance with air quality standards and by the
  cement industry to test raw materials to assure product quality and
  uniformity.

       The Company also participates in the process monitoring, analysis,
  gauging, and control instruments markets, primarily for the oil, gas, and
  petrochemical industries. The Company manufactures and markets a number of
  process monitoring, analysis, and control systems including: analog and
  digital recorders for continuous process industries; process and laboratory
  analytical instruments and monitors to detect lethal gases for the oil,
  gas, and petrochemical industries; supervisory control and data acquisition
  software for process monitoring and operator interface in a variety of
  industrial processes; and turnkey, integrated systems to control networks
  of distant oil and gas wells.

       The Company also manufactures and markets process gauges and
  noncontacting and nonintrusive process control instrumentation to measure
  liquid levels, density, weight, and flows for a variety of industries.
  Application examples include measuring levels in a pharmaceutical reactor,
  determining the percentage by weight of solids contained in a mining
  slurry, or monitoring the flow of fluid into a wastewater treatment
  facility. The Company's X-ray fluorescence instruments allow for the
  nondestructive analysis of inorganic elements. Applications include alloy
  identification, on-line process monitoring and quality control,
  characterization of toxic metals in soil, and thickness and/or composition
  of semiconductor thin films. 

  Customers and Marketing

       The Company sells many of its products and services to customers whose
  activities are subject to numerous environmental quality, pollution
  control, and occupational safety and health regulations and laws enacted by
  federal, state, and local governments and by international accord.
  Customers include industrial manufacturers, environmental laboratories,
  utilities, waste management and treatment facilities, and government
  agencies. The Company's analytical instruments are also used in biomedical
  applications such as analysis of drugs and drug metabolites; in academic
  and industrial chemical research; in forensic science; in energy and
  mineral resource exploration and production; in metals processing; and in a
  range of product quality assurance and process monitoring applications. The
  Company's process control instrumentation is used primarily in the oil,
  gas, and petrochemical industries. 

       The Company sells its products through its own marketing and sales
  force in North America, Europe, and Asia and receives additional market
  coverage through authorized representatives throughout the world. Some
  products are distributed through original equipment manufacturer (OEM)
  agreements. The Company's products are installed and serviced in most major
  markets by the Company's personnel. Installation and service in some
  countries are provided by authorized representatives. Customers may
  purchase service contracts from the Company to cover equipment no longer
  under warranty, and service work also is provided on a time, materials, and
  expense basis. Training courses on both the operation and maintenance of
  the Company's products are conducted for customers and authorized
  representatives who service the products.
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       (ii) & (xi) New Products; Research and Development

       The Company maintains active programs for the development of new
  products using both new and existing technologies and for enhancing
  existing products by improving their price-performance ratio. The
  development of new applications for the Company's analytical instrument
  products is an especially important element of the growth strategy for
  these products. Although the Company's products are subject to obsolescence
  due to technological developments, sudden obsolescence is not
  characteristic of the Company's business.

       Research and development expenses for the Company were $54,314,000,
  $42,924,000, and $34,510,000 in 1995, 1994, and 1993, respectively.

       (iii)  Raw Materials

       The Company manufactures many of the parts and subsystems used in its
  products, including optical components and proprietary circuitry. Other
  components, including packaging materials, integrated circuits,
  microprocessors, and computers, are manufactured by others. The 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 upon the
  Company's business.

       (iv)   Patents, Licenses, and Trademarks

       The Company's policy is to protect its intellectual property rights,
  including applying for and obtaining patents when appropriate. The Company
  also enters into licensing agreements with other companies in which it
  grants or receives rights to specific patents and technical know-how.
  Patent protection is believed to provide the Company with competitive
  advantages with respect to certain instruments such as its mass
  spectrometers with ion traps. The Company also considers technical
  know-how, trade secrets, and trademarks to be important to its business.

       (v)    Seasonal Influences

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

       (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 requirements.

       (vii)  Dependency on a Single Customer

       No single customer accounted for more than 10% of the Company's total
  revenues in any of the past three years.

       (viii) Backlog

       The Company's backlog of firm orders as of December 30, 1995 and
  December 31, 1994 was $188,680,000 and $139,596,000, respectively. The
  Company anticipates that substantially all of the backlog at December 30,
  1995, will be shipped or completed within the current fiscal year.
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       (ix)   Government Contracts

       Not applicable.

       (x)    Competition

       The Company generally competes on the basis of technical advances that
  result in new products and improved price/performance ratios, reputation
  among customers as a quality leader for products and services, and active
  research and application-development programs. To a lesser extent, the
  Company competes on the basis of price.

       In many markets, the Company competes with large analytical instrument
  companies such as Hewlett-Packard Co. (Hewlett-Packard), Perkin Elmer
  Corporation (Perkin Elmer), Varian Associates (Varian), and Hitachi Ltd.
  (Hitachi). Certain products manufactured by the Company also compete with
  products sold by numerous smaller, specialized firms.

       ThermoSpectra competes in each of its markets primarily on the basis
  of technical advances that result in new products and improved
  price/performance ratios and reputation among customers as a quality leader
  for products and services. To a lesser extent, ThermoSpectra competes on
  the basis of price. The DSO market is dominated by Tektronix, Inc. and
  Hewlett-Packard. In the X-ray microanalysis market, ThermoSpectra competes
  primarily with Link Analytical Limited, a wholly owned subsidiary of Oxford
  Instruments plc. In the X-ray inspection market, ThermoSpectra competes
  with smaller companies in the manual segment of the market, and primarily
  with Four Pi Systems, a subsidiary of Hewlett-Packard, in the automated
  segment. In the digital video segment of the confocal microscopy market,
  ThermoSpectra competes primarily with Nikon Inc. as well as Bio-Rad
  Laboratories, Inc. (Bio-Rad), Carl Zeiss, Inc., and Leica plc.

       Thermo BioAnalysis competes in each of its markets primarily on the
  basis of technical performance and reliability. Thermo BioAnalysis'
  principal competitors in the capillary electrophoresis market include
  Beckman Instruments Inc. (Beckman Instruments), Bio-Rad, and
  Hewlett-Packard. In the MALDI-TOF mass spectrometry market, principal
  competitors include PerSeptive Biosystems Inc. and Shimadzu Corporation
  (Shimadzu). Significant competitors in the health physics instrumentation
  market include the Nuclear Instruments Group of EG&G, Inc., the Nuclear
  Products Division of Morgan Crucible Co., plc, the Bicron/NE Technology
  divisions of Saint-Gobain/Norton Industrial Ceramics Corporation, and the
  Rados Companies.

       Thermo Optek competes in each of its markets primarily on performance,
  reliability, customer service, and price. In the market for AE and AA
  spectrometers and ICP/MS instruments, Thermo Optek competes primarily with
  Perkin Elmer and, to a lesser extent, Varian. In the FT-IR and FT-Raman
  markets, Thermo Optek competes primarily with Perkin Elmer, the Digilab
  division of Bio-Rad, Bruker Instruments Inc., and Bomen Inc.

       ThermoQuest competes in each of its markets primarily on performance,
  customer service and support and, to a lesser extent, price. ThermoQuest's
  principal competitors in the mass spectrometry market include
  Hewlett-Packard, Japan Electro Optical Laboratories, Hitachi, Fisons,
  Shimadzu, and the Sciex Division of Perkin Elmer. ThermoQuest competes in 
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  the liquid chromatography market with Waters Corporation, Hewlett-Packard,
  Shimadzu, Beckman Instruments, Hitachi, Perkin Elmer, Varian, Dionex
  Corporation, and others. In the gas chromatography market, ThermoQuest
  competes with numerous companies, including Hewlett-Packard, Perkin Elmer,
  Varian, Hitachi, and Shimadzu.

       The Company is a leading manufacturer of ambient air monitoring
  instruments and a major manufacturer of source monitoring and worker-safety
  monitoring instruments. The Company competes in these markets on the basis
  of technical performance and reliability, as well as customer service.

       The Company has a relatively small presence within the large and
  varied process control marketplace, which is extremely fragmented and
  comprises several large companies and numerous smaller companies. The
  Company competes in this market primarily on the basis of technical
  performance, customer service, and reliability.

       (xii) Environmental Protection Regulations

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

       (xiii) Number of Employees

       As of December 30, 1995, the Company employed 4,752 people.

  (d)  Financial Information About Exports by Domestic Operations and About
       Foreign Operations.

       Financial information about exports by domestic operations and about
  foreign operations is summarized in Note 14 to Consolidated Financial
  Statements in the Registrant's 1995 Annual Report to Shareholders and is
  incorporated herein by reference.

  (e)  Executive Officers of the Registrant.

                                Present Title (Year First Became 
  Name                   Age    Executive Officer)
  --------------------   ---    ---------------------------------
  Arvin H. Smith         66     President and Chief Executive Officer (1986)
  Earl R. Lewis          52     Executive Vice President and
                                 Chief Operating Officer (1990)
  Denis A. Helm          56     Senior Vice President (1986)
  Richard W.K. Chapman   51     Vice President (1994)
  Barry S. Howe          40     Vice President (1994)
  John N. Hatsopoulos *  61     Vice President and Chief Financial
                                 Officer (1988)
  Paul F. Kelleher       53     Chief Accounting Officer (1986)

  * John N. Hatsopoulos and George N. Hatsopoulos, a director of the
    Company, are brothers.

       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 Mr. Chapman,
  have held comparable positions for at least five years either with the 
                                       11PAGE
<PAGE>
  Company or with its parent company, Thermo Electron. Mr. Chapman has been
  President and Chief Executive Officer of ThermoQuest since its inception in
  June 1995, and served as President of the Company's Finnigan Corporation
  (Finnigan) subsidiary from 1992 to 1995 and as Marketing Manager of
  Finnigan from 1989 to 1992. Messrs. Helm, Lewis, Chapman, and Howe are
  full-time employees of the Company. Messrs. Smith, Hatsopoulos, and
  Kelleher are full-time employees of Thermo Electron and certain of its
  subsidiaries, but devote such time to the affairs of the Company as the
  Company's needs reasonably require.


  Item 2.  Properties

       The Company owns approximately 1,446,000 square feet of office,
  engineering, laboratory, and production space, principally in California,
  Colorado, Florida, New Mexico, Texas, Wisconsin, Germany, and England, and
  leases approximately 1,596,000 square feet of office, engineering,
  laboratory, and production space under leases expiring from 1996 through
  2017, principally in California, Massachusetts, Connecticut, Ohio, Texas,
  Wisconsin, England, France, The Netherlands, Germany, and Japan. As of
  December 30, 1995, the Company had a $10,101,000 mortgage loan that is
  secured by 200,000 square feet of property in California with a net book
  value of $16,303,000. The Company believes that its facilities are in good
  condition and are suitable and adequate for its present operations and that
  suitable space is readily available if any of such leases are not extended.


  Item 3.  Legal Proceedings

       In August 1995, ThermoQuest's Finnigan subsidiary settled certain
  patent litigation involving a claim by Analytica of Branford, Inc.
  (Analytica) that Finnigan was infringing a U.S. patent entitled "Method of
  Producing Multiply Charged Ions and For Determining Molecular Weights of
  Molecules By Use of the Multiply Charged Ions of Molecules." Under the
  settlement, ThermoQuest is required to make certain payments to Analytica
  that are not expected to have a material effect of the Company's financial
  position or results of operations.

       The Company has been notified that the Environmental Protection Agency
  has determined that a release or a substantial threat of a release of a
  hazardous substance, as defined in the Comprehensive Environmental Response
  Compensation and Liability Act of 1980 (CERCLA or the Superfund law),
  occurred at one site to which chemical or other wastes generated by the
  manufacturing operations of a subsidiary of the Company were sent. The
  notification alleges that the subsidiary may be a potentially responsible
  party with respect to the remedial actions needed to control or clean up
  any such release. Under CERCLA, responsible parties can include current and
  previous owners of the site, generators of hazardous substances disposed of
  at the site, and transporters of hazardous substances to the site. Each
  responsible party can be jointly and severally liable, without regard to
  fault or negligence, for all costs associated with the remediation of the
  site. The Company believes that its subsidiary is only one of several
  companies which received such notification and who may likewise be held
  liable for any such remedial costs.

       The Company is also involved in situations under state environmental
  laws with respect to certain other sites where remediation may be required.
  The Company is conducting investigative or remediation activities at these
                                       12PAGE
<PAGE>
  sites pursuant to arrangements with state environmental agencies.

       The Company evaluates its potential liability as a responsible party
  for these environmental matters on an ongoing basis based upon factors such
  as the estimated remediation costs, the nature and duration of the
  Company's involvement with the site, the financial strength of other
  potentially responsible parties, and the availability of indemnification
  from previous owners of acquired businesses. Estimated liabilities are
  accrued in accordance with Statement of Financial Accounting Standards No.
  5, "Accounting for Contingencies." To date, the Company has not incurred
  any significant liability with respect to any of these sites and the
  Company anticipates that future liabilities related to sites with which the
  Company is currently involved will not have a materially adverse effect on
  the Company's business, results of operations or financial condition. 


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

       Not applicable.


                                    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, $.10 par value, and dividend policy is included
  under the sections labeled "Common Stock Market Information" and "Dividend
  Policy" in the Registrant's 1995 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 1995 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 1995 Annual Report to Shareholders and is
  incorporated herein by reference.


  Item 8.  Financial Statements and Supplementary Data

       The Registrant's Consolidated Financial Statements as of December 30,
  1995, are included in the Registrant's 1995 Annual Report to Shareholders
  and are incorporated herein by reference.
                                       13PAGE
<PAGE>
  Item 9.  Changes in and Disagreements with Accountants on Accounting and
           Financial Disclosure

       Not applicable.


                                   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 "Disclosure of Certain Late Filings" 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.


                                       14PAGE
<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

           Certain 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.

           During the quarter ended December 30, 1995, the Registrant was
           not required to file, and did not file, any Current Report on 
           Form 8-K.

       (c) Exhibits.

           See Exhibit Index on the page immediately preceding exhibits.





                                       15PAGE
<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 on its behalf by the undersigned, thereunto duly authorized.

  Date: March 11, 1996                    THERMO INSTRUMENT SYSTEMS INC.


                                          By: Arvin H. Smith
                                              ----------------------
                                              Arvin H. Smith
                                              President and
                                              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 March 11, 1996.

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

  By: Arvin H. Smith                 President, Chief Executive Officer
      -----------------------         and Director
      Arvin H. Smith                  

  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: Marshall J. Armstrong          Director
      -----------------------
      Marshall J. Armstrong

  By: Frank Borman                   Director
      -----------------------
      Frank Borman

  By: Elias P. Gyftopoulos           Director
      -----------------------
      Elias P. Gyftopoulos

  By: George N. Hatsopoulos          Chairman of the Board and Director
      -----------------------
      George N. Hatsopoulos

  By: Robert C. Howard               Director
      -----------------------
      Robert C. Howard

  By: Frank Jungers                  Director
      -----------------------
      Frank Jungers

  By: Robert A. McCabe               Director
      -----------------------
      Robert A. McCabe

  By: Polyvios C. Vintiadis          Director
      -----------------------
      Polyvios C. Vintiadis

                                       16PAGE
<PAGE>
                   Report of Independent Public Accountants
                   ----------------------------------------


  To the Shareholders and Board of Directors of
  Thermo Instrument Systems Inc.:

       We have audited, in accordance with generally accepted auditing
  standards, the consolidated financial statements included in Thermo
  Instrument Systems Inc.'s Annual Report to Shareholders incorporated by
  reference in this Form 10-K, and have issued our report thereon dated
  February 12, 1996 (except with respect to the matter discussed in Note 15
  as to which the date is March 1, 1996). 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 15 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. This 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 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
  February 12, 1996
















                                       17PAGE
<PAGE>
SCHEDULE II



                         THERMO INSTRUMENT SYSTEMS INC.

                        VALUATION AND QUALIFYING ACCOUNTS
                                 (In thousands)


                                     Bad
                         Charged   Debts      Ac-
            Balance at  to Costs     Re-   counts                      Balance
             Beginning       and  cover-  Written  Disposi-             at End
Description    of Year  Expenses      ed      Off  tions(b)  Other(a)  of Year
- ------------------------------------------------------------------------------

Year Ended
 December 30,
 1995

Allowance for
 Doubtful
 Accounts       $8,779    $2,543  $  191   $(2,942)  $     -   $3,998  $12,569

Year Ended
 December 31,
 1994

Allowance for
 Doubtful
 Accounts       $8,456    $  733  $  126   $(2,736)  $(2,696)  $4,896  $ 8,779

Year Ended
 January 1,
 1994

Allowance for
 Doubtful
 Accounts       $7,276    $  970  $1,241   $(1,733)  $  (586)  $1,288  $ 8,456


(a) Includes allowance of businesses acquired during the year as described in
    Note 4 to Consolidated Financial Statements in the Company's 1995 Annual
    Report to Shareholders and the effect of foreign currency translation.

(b) As described in Note 3 to Consolidated Financial Statements in the
    Registrant's 1995 Annual Report to Shareholders.




                                       18PAGE
<PAGE>
                                  EXHIBIT INDEX

   Exhibit
   Number       Description of Exhibit                                   Page
   ----------   -------------------------------------------------------  ----

     2.1        Asset and Stock Purchase Agreement among the Registrant,
                Thermo Electron Corporation and Fisons plc dated March
                1, 1995, as amended (filed as Exhibit 2.3 to the
                Registrant's Annual Report on Form 10-K for the fiscal
                year ended December 31, 1994 and as Exhibit 2 to the
                Registrant's Quarterly Report on Form 10-Q for the
                quarter ended September 30, 1995 [File No. 1-9786] and
                incorporated herein by reference). Pursuant to Item
                601(b)(2) of Regulation S-K, schedules to this Agreement
                have been omitted. The Company hereby undertakes to
                furnish supplementally a copy of such schedules to the
                Commission upon request.

     3.1        Restated Certificate of Incorporation of the Registrant,
                as amended (filed as Exhibit 3.1 to the Registrant's
                Annual Report on Form 10-K for the fiscal year ended
                January 1, 1994 [File No. 1-9786] and incorporated
                herein by reference).

     3.2        By-Laws of the Registrant (filed as Exhibit 3(b) to the
                Registrant's Annual Report on Form 10-K for the fiscal
                year ended January 2, 1993 [File No. 1-9786] and
                incorporated herein by reference).

     4.1        Fiscal Agency Agreement dated as of August 2, 1991 among
                the Registrant, Thermo Electron Corporation, and
                Chemical Bank as fiscal agent, relating to $86,250,000
                principal amount of 6 5/8% subordinated convertible
                debentures due 2001 (filed as Exhibit 4(a) to the
                Registrant's Annual Report on Form 10-K for the fiscal
                year ended December 28, 1991 [File No. 1-9786] and
                incorporated herein by reference).

     4.2        Fiscal Agency Agreement dated as of September 15, 1993,
                among the Registrant, Thermo Electron Corporation and
                Chemical Bank as fiscal agent, relating to $70,000,000
                principal amount of 3 3/4% senior convertible debentures
                due 2000 (filed as Exhibit 4 to the Registrant's
                Quarterly Report on Form 10-Q for the quarter ended
                October 2, 1993 [File No. 1-9786] and incorporated by
                reference).

     4.3        Senior convertible note purchase agreement by and
                between the Registrant and Thermo Electron Corporation
                as of September 15, 1993 (filed as Exhibit 10(a) to the
                Registrant's Quarterly Report on Form 10-Q for the
                quarter ended October 2, 1993 [File No. 1-9786] and
                incorporated by reference).


                                       19PAGE
<PAGE>
                                  EXHIBIT INDEX

   Exhibit
   Number       Description of Exhibit                                   Page
   ----------   -------------------------------------------------------  ----

                The Registrant hereby agrees, pursuant to Item 601(b)
                (4) (iii) (A) of Regulation S-K, to furnish to the
                Commission upon request, a copy of each instrument with
                respect to other long-term debt of the Registrant or its
                subsidiaries.

    10.1        Amended and Restated Corporate Services Agreement, dated
                as of January 3, 1993, between Thermo Electron
                Corporation and the Registrant (filed as Exhibit 10(a)
                to the Registrant's Annual Report on Form 10-K for the
                fiscal year ended January 2, 1993 [File No. 1-9786] and
                incorporated herein by reference).

    10.2        Tax Allocation Agreement dated as of May 29, 1986,
                between Thermo Electron and the Registrant (filed as
                Exhibit 10(b) to the Registrant's Registration Statement
                on Form S-1 [Reg. No. 33-6762] and incorporated herein
                by reference).

    10.3        Thermo Electron Corporate Charter, as amended and
                restated effective January 3, 1993 (filed as Exhibit
                10(f) to the Registrant's Annual Report on Form 10-K for
                the fiscal year ended January 2, 1993 [File No. 1-9786]
                and incorporated herein by reference).

    10.4        Form of Indemnification Agreement with Directors and
                Officers (filed as Exhibit 10(g) to the Registrant's
                Annual Report on Form 10-K for the fiscal year ended
                December 29, 1990 [File No. 1-9786] and incorporated
                herein by reference).

    10.5        Plan for sale of shares by the Registrant to Thermo
                Electron Corporation (filed as Exhibit 10(dd) to the
                Registrant's Quarterly Report on Form 10-Q for the
                quarter ended July 3, 1993 [File No. 1-9786] and
                incorporated herein by reference).

    10.6        Master Repurchase Agreement dated January 1, 1994
                between the Registrant and Thermo Electron Corporation
                (filed as Exhibit 10.7 to the Registrant's Annual Report
                on Form 10-K for the fiscal year ended January 1, 1994
                [File No. 1-9786] and incorporated herein by reference).

    10.7        Master Guarantee Reimbursement Agreement dated January
                1, 1994 by and among the Registrant and Thermo Electron
                Corporation (filed as Exhibit 4.4 to the Registrant's
                Annual Report on Form 10-K for the fiscal year ended
                December 31, 1994 [File No. 1-9786] and incorporated
                herein by reference).

   10.8-10.15   Reserved.
                                       20PAGE
<PAGE>
                                  EXHIBIT INDEX

   Exhibit
   Number       Description of Exhibit                                   Page
   ----------   -------------------------------------------------------  ----

    10.16       Deferred Compensation Plan for Directors of the
                Registrant (filed as Exhibit 10(f) to the Registrant's
                Registration Statement on Form S-1 [Reg. No. 33-6762]
                and incorporated herein by reference).

    10.17       Directors' Stock Option Plan of the Registrant (filed as
                Exhibit 10.17 to the Registrant's Annual Report on Form
                10-K for the fiscal year ended December 31, 1994 [File
                No. 1-9786] and incorporated herein by reference).

    10.18       Incentive Stock Option Plan of the Registrant (filed as
                Exhibit 10(c) to the Registrant's Registration Statement
                on Form S-1 [Reg. No. 33-6762] 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 2,812,500 shares,
                after adjustment to reflect share increase approved in
                1990, 3-for-2 stock splits effected in January 1988,
                July 1993 and April 1995 and 5-for-4 stock split
                effected in December 1995).

    10.19       Nonqualified Stock Option Plan of the Registrant (filed
                as Exhibit 10(d) to the Registrant's Registration
                Statement on Form S-1 [Reg. No. 33-6762] 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 2,812,500
                shares, after adjustment to reflect share increase
                approved in 1990, 3-for-2 stock splits effected in
                January 1988, July 1993 and April 1995 and 5-for-4 stock
                split effected in December 1995).

    10.20       Equity Incentive Plan of the Registrant (filed as
                Appendix A to the Proxy Statement dated April 27, 1993
                of the Registrant [File No. 1-9786] and incorporated
                herein by reference). (Maximum number of shares issuable
                is 4,031,250 shares, after adjustment to reflect share
                increase approved in December 1993, 3-for-2 stock splits
                effected in July 1993 and April 1995 and 5-for-4 stock
                split effected in December 1995).

    10.21       Finnigan Corporation 1979 Long-term Incentive Stock
                Option Plan (filed as Exhibit 10.21 to the Registrant's
                Annual Report on Form 10-K for the fiscal year ended
                December 31, 1994 [File No. 1-9786] and incorporated
                herein by reference).




                                       21PAGE
<PAGE>
                                  EXHIBIT INDEX

   Exhibit
   Number       Description of Exhibit                                   Page
   ----------   -------------------------------------------------------  ----

    10.22       Former Thermo Environmental Corporation Incentive Stock
                Option Plan (filed as Exhibit 10(d) to Thermo
                Environmental's Registration Statement on Form S-1 [Reg.
                No. 33-329] and incorporated herein by reference).
                (Maximum number of shares issuable in the aggregate
                under this plan and the Former Thermo Environmental
                Corporation Nonqualified Stock Option Plan is 1,160,156
                shares, after adjustment to reflect share increase
                approved in 1987, 3-for-2 stock splits effected in July
                1993 and April 1995 and 5-for-4 stock split effected in
                December 1995).

    10.23       Former Thermo Environmental Corporation Nonqualified
                Stock Option Plan (filed as Exhibit 10(e) to Thermo
                Environmental's Registration Statement on Form S-1 [Reg.
                No. 33-329] and incorporated herein by reference).
                (Maximum number of shares issuable in the aggregate
                under this plan and the Former Thermo Environmental
                Corporation Incentive Stock Option Plan is 1,160,156
                shares, after adjustment to reflect share increase
                approved in 1987, 3-for-2 stock splits effected in July
                1993 and April 1995 and 5-for-4 stock split effected in
                December 1995).

    10.24       Thermo Instrument Systems Inc. - ThermoSpectra
                Corporation Nonqualified Stock Option Plan (filed as
                Exhibit 10.51 to the Registrant's Annual Report on Form
                10-K for the fiscal year ended December 31, 1994 [File
                No. 1-9786] and incorporated herein by reference).

    10.25       Thermo Instrument Systems Inc. - ThermoQuest Corporation
                Nonqualified Stock Option Plan (filed as Exhibit 10.65
                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).

    10.26       Thermo Instrument Systems Inc. - Thermo BioAnalysis
                Corporation Nonqualified Stock Option Plan (filed as
                Exhibit 10.64 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).

                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 the Registrants' parent, Thermo Electron Corporation,
                and its subsidiaries, for services rendered to the
                Registrant or to such affiliated corporations. Such
                plans are listed under Exhibits 10.27-10.89.

                                       22PAGE
<PAGE>
                                  EXHIBIT INDEX
 
   Exhibit
   Number       Description of Exhibit                                   Page
   ----------   -------------------------------------------------------  ----

    10.27       Thermo Electron Corporation Incentive Stock Option Plan
                (filed as Exhibit 4(d) to Thermo Electron's Registration
                Statement on Form S-8 [Reg. No. 33-8993] and
                incorporated herein by reference). (Maximum number of
                shares issuable in the aggregate under this plan and the
                Thermo Electron Nonqualified Stock Option Plan is
                9,035,156 shares, after adjustment to reflect share
                increases approved in 1984 and 1986, share decrease
                approved in 1989, and 3-for-2 stock splits effected in
                October 1986, October 1993 and May 1995).

    10.28       Thermo Electron Corporation Nonqualified Stock Option
                Plan (filed as Exhibit 4(e) to Thermo Electron's
                Registration Statement on Form S-8 [Reg. No. 33-8993]
                and incorporated herein by reference). (Plan amended in
                1984 to extend expiration date to December 14, 1994;
                maximum number of shares issuable in the aggregate under
                this plan and the Thermo Electron Incentive Stock Option
                Plan is 9,035,156 shares, after adjustment to reflect
                share increases approved in 1984 and 1986, share
                decrease approved in 1989, and 3-for-2 stock splits
                effected in October 1986, October 1993 and May 1995).

    10.29       Thermo Electron Corporation Equity Incentive Plan (filed
                as Exhibit A to Thermo Electron's Proxy Statement dated
                April 12, 1989 [File No. 1-8002] and incorporated herein
                by reference). (Plan amended in 1989 to restrict
                exercise price for SEC reporting persons to not less
                than 50% of fair market value or par value; maximum
                number of shares issuable is 7,050,000 shares, after
                adjustment to reflect 3-for-2 stock splits effected in
                October 1993 and May 1995 and share increase approved in
                1994).

    10.30       Thermo Electron Corporation - Thermedics Inc.
                Nonqualified Stock Option Plan (filed as Exhibit 4 to a
                Registration Statement on Form S-8 of Thermedics [Reg.
                No. 2-93747] and incorporated herein by reference).
                (Maximum number of shares issuable is 450,000 shares,
                after adjustment to reflect share increase approved in
                1988, 5-for-4 stock split effected in January 1985,
                4-for-3 stock split effected in September 1985 and
                3-for-2 stock splits effected in October 1986 and
                November 1993).

    10.31       Thermo Electron Corporation - Thermo Instrument Systems
                Inc. (formerly Thermo Environmental Corporation)
                Nonqualified Stock Option Plan (filed as Exhibit 4(c) to
                the Registrant's Registration Statement on Form S-8
                [Reg. No. 33-8034] and incorporated herein by
                reference). (Maximum number of shares issuable is
                421,875 shares, after adjustment to reflect 3-for-2
                stock splits effected in July 1993 and April 1995 and
                5-for-4 stock split effected in December 1995).

                                       23PAGE
<PAGE>
                                  EXHIBIT INDEX

   Exhibit
   Number       Description of Exhibit                                   Page
   ----------   -------------------------------------------------------  ----

    10.32       Thermo Electron Corporation - Thermo Instrument Systems
                Inc. Nonqualified Stock Option Plan (filed as Exhibit
                10.12 to Thermo Electron's Annual Report on Form 10-K
                for the fiscal year ended January 3, 1987 [File No.
                1-8002] and incorporated herein by reference). (Maximum
                number of shares issuable is 600,285 shares, after
                adjustment to reflect share increase approved in 1988,
                3-for-2 stock splits effected in January 1988, July 1993
                and April 1995 and 5-for-4 stock split effected in
                December 1995).

    10.33       Thermo Electron Corporation - Thermo TerraTech Inc.
                (formerly Thermo Process Systems Inc.) Nonqualified
                Stock Option Plan (filed as Exhibit 10.13 to Thermo
                Electron's Annual Report on Form 10-K for the fiscal
                year ended January 3, 1987 [File No. 1-8002] and
                incorporated herein by reference). (Maximum number of
                shares issuable is 108,000 shares, after adjustment to
                reflect 6-for-5 stock splits effected in July 1988 and
                March 1989 and 3-for-2 stock split effected in September
                1989).

    10.34       Thermo Electron Corporation - Thermo Power Corporation
                (formerly Tecogen Inc.) Nonqualified Stock Option Plan
                (filed as Exhibit 10.14 to Thermo Electron's Annual
                Report on Form 10-K for the fiscal year ended January 3,
                1987 [File No. 1-8002] and incorporated herein by
                reference). (Amended in September 1995 to extend the
                plan expiration date to December 31, 2005).

    10.35       Thermo Electron Corporation - Thermo Cardiosystems Inc.
                Nonqualified Stock Option Plan (filed as Exhibit 10.11
                to Thermo Electron's Annual Report on Form 10-K for the
                fiscal year ended December 29, 1990 [File No. 1-8002]
                and incorporated herein by reference). (Maximum number
                of shares issuable is 130,500 shares, after adjustment
                to reflect share increases approved in 1990 and 1992,
                3-for-2 stock split effected in January 1990, 5-for-4
                stock split effected in May 1990 and 2-for-1 stock split
                effected in November 1993).

    10.36       Thermo Electron Corporation - Thermo Ecotek Corporation
                (formerly Thermo Energy Systems Corporation)
                Nonqualified Stock Option Plan (filed as Exhibit 10.12
                to Thermo Electron's Annual Report on Form 10-K for the
                fiscal year ended December 29, 1990 [File No. 1-8002]
                and incorporated herein by reference).

                                       24PAGE
<PAGE>
                                  EXHIBIT INDEX

   Exhibit
   Number       Description of Exhibit                                   Page
   ----------   -------------------------------------------------------  ----

    10.37       Thermo Electron Corporation - ThermoTrex Corporation
                (formerly Thermo Electron Technologies Corporation)
                Nonqualified Stock Option Plan (filed as Exhibit 10.13
                to Thermo Electron's Annual Report on Form 10-K for the
                fiscal year ended December 29, 1990 [File No. 1-8002]
                and incorporated herein by reference). (Maximum number
                of shares issuable is 180,000 shares, after adjustment
                to reflect 3-for-2 stock split effected in October
                1993).

    10.38       Thermo Electron Corporation - Thermo Fibertek Inc.
                Nonqualified Stock Option Plan (filed as Exhibit 10.14
                to Thermo Electron's Annual Report on Form 10-K for the
                fiscal year ended December 28, 1991 [File No. 1-8002]
                and incorporated herein by reference). (Maximum number
                of shares issuable is 600,000 shares, after adjustment
                to reflect 2-for-1 stock split effected in September
                1992 and 3-for-2 stock split effected in September
                1995).

    10.39       Thermo Electron Corporation - Thermo Voltek Corp.
                (formerly Universal Voltronics Corp.) Nonqualified Stock
                Option Plan (filed as Exhibit 10.17 to Thermo Electron's
                Annual Report on Form 10-K for the fiscal year ended
                January 2, 1993 [File No. 1-8002] and incorporated
                herein by reference). (Maximum number of shares issuable
                is 57,500 shares, after adjustment to reflect 3-for-2
                stock split effected in November 1993 and share increase
                approved in September 1995).

    10.40       Thermo Electron Corporation - Thermo BioAnalysis
                Corporation Nonqualified Stock Option Plan (filed as
                Exhibit 10.31 to Thermo Power's Annual Report on Form
                10-K for the fiscal year ended September 30, 1995 [File
                No. 1-10573] and incorporated herein by reference).

    10.41       Thermo Electron Corporation - ThermoLyte Corporation
                Nonqualified Stock Option Plan (filed as Exhibit 10.32
                to Thermo Power's Annual Report on Form 10-K for the
                fiscal year ended September 30, 1995 [File No. 1-10573]
                and incorporated herein by reference).

    10.42       Thermo Electron Corporation - Thermo Remediation Inc.
                Nonqualified Stock Option Plan (filed as Exhibit 10.33
                to Thermo Power's Annual Report on Form 10-K for the
                fiscal year ended September 30, 1995 [File No. 1-10573]
                and incorporated herein by reference).

    10.43       Thermo Electron Corporation - ThermoSpectra Corporation
                Nonqualified Stock Option Plan (filed as Exhibit 10.34
                to Thermo Power's Annual Report on Form 10-K for the
                fiscal year ended September 30, 1995 [File No. 1-10573]
                and incorporated herein by reference).

                                       25PAGE
<PAGE>
                                  EXHIBIT INDEX

   Exhibit
   Number       Description of Exhibit                                   Page
   ----------   -------------------------------------------------------  ----

    10.44       Thermo Electron Corporation - ThermoLase Corporation
                Nonqualified Stock Option Plan (filed as Exhibit 10.35
                to Thermo Power's Annual Report on Form 10-K for the
                fiscal year ended September 30, 1995 [File No. 1-10573]
                and incorporated herein by reference).

    10.45       Thermo Electron Corporation - ThermoQuest Corporation
                Nonqualified Stock Option Plan (filed as Exhibit 10.41
                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).

    10.46       Thermo Electron Corporation - Thermo Optek Corporation
                Nonqualified Stock Option Plan (filed as Exhibit 10.42
                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).

    10.47       Thermo Electron Corporation - Thermo Sentron Inc.
                Nonqualified Stock Option Plan (filed as Exhibit 10.43
                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).

    10.48       Thermo Electron Corporation - Trex Medical Corporation
                Nonqualified Stock Option Plan (filed as Exhibit 10.44
                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).

    10.49       Thermo Ecotek Corporation (formerly Thermo Energy
                Systems Corporation) Incentive Stock Option Plan (filed
                as Exhibit 10.18 to Thermo Electron's Annual Report on
                Form 10-K for the fiscal year ended January 2, 1993
                [File No. 1-8002] and incorporated herein by reference).
                (Maximum number of shares issuable in the aggregate
                under this plan and the Thermo Ecotek Nonqualified Stock
                Option Plan is 900,000 shares, after adjustment to
                reflect share increase approved in December 1993).

    10.50       Thermo Ecotek Corporation (formerly Thermo Energy
                Systems Corporation) Nonqualified Stock Option Plan
                (filed as Exhibit 10.19 to Thermo Electron's Annual
                Report on Form 10-K for the fiscal year ended January 2,
                1993 [File No. 1-8002] and incorporated herein by
                reference). (Maximum number of shares issuable in the
                aggregate under this plan and the Thermo Ecotek
                Incentive Stock Option Plan is 900,000 shares, after
                adjustment to reflect share increase approved in
                December 1993).

                                       26PAGE
<PAGE>
                                  EXHIBIT INDEX

   Exhibit
   Number       Description of Exhibit                                   Page
   ----------   -------------------------------------------------------  ----

    10.51       Thermo Ecotek Corporation (formerly Thermo Energy
                Systems Corporation) Equity Incentive Plan (filed as
                Exhibit 10.39 to the Registrant's Annual Report on Form
                10-K for the fiscal year ended December 31, 1994 [File
                No. 1-9786] and incorporated herein by reference).

    10.52       Thermedics Inc. Incentive Stock Option Plan (filed as
                Exhibit 10(d) to Thermedics' Registration Statement on
                Form S-1 [Reg. No. 33-84380] and incorporated herein by
                reference). (Maximum number of shares issuable in the
                aggregate under this plan and the Thermedics
                Nonqualified Stock Option Plan is 1,931,923 shares,
                after adjustment to reflect share increases approved in
                1986 and 1992, 5-for-4 stock split effected in January
                1985, 4-for-3 stock split effected in September 1985 and
                3-for-2 stock splits effected in October 1986 and
                November 1993).

    10.53       Thermedics Inc. Nonqualified Stock Option Plan (filed as
                Exhibit 10(e) to Thermedics' Registration Statement on
                Form S-1 [Reg. No. 33-84380] and incorporated herein by
                reference). (Maximum number of shares issuable in the
                aggregate under this plan and the Thermedics Incentive
                Stock Option Plan is 1,931,923 shares, after adjustment
                to reflect share increases approved in 1986 and 1992,
                5-for-4 stock split effected in January 1985, 4-for-3
                stock split effected in September 1985 and 3-for-2 stock
                splits effected in October 1986 and November 1993).

    10.54       Thermedics Inc. Equity Incentive Plan (filed as Appendix
                A to the Proxy Statement dated May 10, 1993 of
                Thermedics [File No. 1-9567] and incorporated herein by
                reference). (Maximum number of shares issuable is
                1,500,000 shares, after adjustment to reflect 3-for-2
                stock split effected in November 1993).

    10.55       Thermedics Inc. - Thermedics Detection Inc. Nonqualified
                Stock Option Plan (filed as Exhibit 10.20 to Thermo
                Electron's Annual Report on Form 10-K for the fiscal
                year ended January 2, 1993 [File No. 1-8002] and
                incorporated herein by reference).

    10.56       Thermedics Inc. - Thermo Sentron Inc. Nonqualified Stock
                Option Plan (filed as Exhibit 10.51 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).

    10.57       Thermedics Detection Inc. Equity Incentive Plan (filed
                as Exhibit 10.69 to the Registrant's Annual Report on
                Form 10-K for the fiscal year ended December 31, 1994
                [File No. 1-9786] and incorporated herein by reference).

                                       27PAGE
<PAGE>
                                  EXHIBIT INDEX

   Exhibit
   Number       Description of Exhibit                                   Page
   ----------   -------------------------------------------------------  ----

    10.58       Thermo Cardiosystems Inc. Incentive Stock Option Plan
                (filed as Exhibit 10(f) to Thermo Cardiosystems'  
                Registration Statement on Form S-1 [Reg. No. 33-25144]
                and incorporated herein by reference). (Maximum number
                of shares issuable in the aggregate under this plan and
                the Thermo Cardiosystems Nonqualified Stock Option Plan
                is 1,143,750 shares, after adjustment to reflect share
                increase approved in 1992, 3-for-2 stock split effected
                in January 1990, 5-for-4 stock split effected in May
                1990 and 2-for-1 stock split effected in November 1993).

    10.59       Thermo Cardiosystems Inc. Nonqualified Stock Option Plan
                (filed as Exhibit 10(g) to Thermo Cardiosystems'
                Registration Statement on Form S-1 [Reg. No. 33-25144]
                and incorporated herein by reference). (Maximum number
                of shares issuable in the aggregate under this plan and
                the Thermo Cardiosystems Incentive Stock Option Plan is
                1,143,750 shares, after adjustment to reflect share
                increase approved in 1992, 3-for-2 stock split effected
                in January 1990, 5-for-4 stock split effected in May
                1990 and 2-for-1 stock split effected in November 1993).

    10.60       Thermo Cardiosystems Inc. Equity Incentive Plan (filed
                as Exhibit 10.46 to the Registrant's Annual Report on
                Form 10-K for the fiscal year ended December 31, 1994
                [File No. 1-9786] and incorporated herein by reference).

    10.61       Thermo Voltek Corp. (formerly Universal Voltronics
                Corp.) 1985 Stock Option Plan (filed as Exhibit 10.14 to
                Thermo Voltek's Annual Report on Form 10-K for the
                fiscal year ended June 30, 1985 [File No. 0-8245] and
                incorporated herein by reference). (Maximum number of
                shares issuable is 200,000 shares, after adjustment to
                reflect 1-for-3 reverse stock split effected in November
                1992 and 3-for-2 stock split effected in November 1993).

    10.62       Thermo Voltek Corp. (formerly Universal Voltronics
                Corp.) 1990 Stock Option Plan (filed as Exhibit 10.2 to
                Thermo Voltek's Annual Report on Form 10-K for the
                fiscal year ended June 30, 1990 [File No. 1-10574] and
                incorporated herein by reference). (Maximum number of
                shares issuable is 400,000 shares, after adjustment to
                reflect share increases in 1993 and 1994, 1-for-3
                reverse stock split effected in November 1992, and
                3-for-2 stock split effected in November 1993).

    10.63       Thermo Voltek Corp. Equity Incentive Plan (filed as
                Exhibit 10.49 to the Registrant's Annual Report on Form
                10-K for the fiscal year ended December 31, 1994 [File
                No. 1-9786] and incorporated herein by reference).

    10.64       Thermo Sentron Equity Incentive Plan (filed as Exhibit
                10.57 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).
                                       28PAGE
<PAGE>
                                  EXHIBIT INDEX

   Exhibit
   Number       Description of Exhibit                                   Page
   ----------   -------------------------------------------------------  ----

    10.65       ThermoSpectra Corporation Equity Incentive Plan (filed
                as Exhibit 10.52 to the Registrant's Annual Report on
                Form 10-K for the fiscal year ended December 31, 1994
                [File No. 1-9786] and incorporated herein by reference).

    10.66       ThermoQuest Corporation Equity Incentive Plan (filed as
                Exhibit 10.69 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).

    10.67       Thermo Optek Corporation Equity Incentive Plan (filed as
                Exhibit 10.70 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).

    10.68       Thermo BioAnalysis Corporation Equity Incentive Plan
                (filed as Exhibit 10.67 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).

    10.69       ThermoTrex Corporation (formerly Thermo Electron
                Technologies Corporation) Incentive Stock Option Plan
                (filed as Exhibit 10(h) to ThermoTrex'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
                ThermoTrex 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).

    10.70       ThermoTrex Corporation (formerly Thermo Electron
                Technologies Corporation) Nonqualified Stock Option Plan
                (filed as Exhibit 10(i) to ThermoTrex'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
                ThermoTrex 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).

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

                                       29PAGE
<PAGE>
                                  EXHIBIT INDEX

   Exhibit
   Number       Description of Exhibit                                   Page
   ----------   -------------------------------------------------------  ----

    10.72       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).

    10.73       ThermoLase Corporation (formerly ThermoLase Inc.)
                Incentive Stock Option Plan (filed as Exhibit 10.55 to
                ThermoTrex's Annual Report on Form 10-K for the fiscal
                year ended January 1, 1994 [File No. 1-10791] and
                incorporated herein by reference). (Maximum number of
                shares issuable in the aggregate under this plan and the
                ThermoLase Nonqualified Stock Option Plan is 2,800,000
                shares, after adjustment to reflect share increase
                approved in 1993 and 2-for-1 stock splits effected in
                March 1994 and June 1995).

    10.74       ThermoLase Corporation (formerly ThermoLase Inc.)
                Nonqualified Stock Option Plan (filed as Exhibit 10.54
                to ThermoTrex's Annual Report on Form 10-K for the
                fiscal year ended January 1, 1994 [File No. 1-10791] and
                incorporated herein by reference). (Maximum number of
                shares issuable in the aggregate under this plan and the
                ThermoLase Incentive Stock Option Plan is 2,800,000
                shares, after adjustment to reflect share increase
                approved in 1993 and 2-for-1 stock splits effected in
                March 1994 and June 1995).

    10.75       ThermoLase Corporation Equity Incentive Plan (filed as
                Exhibit 10.81 to Thermo TerraTech's (formerly Thermo
                Process') Annual Report on Form 10-K for the fiscal year
                ended April 1, 1995 [File No. 1-9549] and incorporated
                herein by reference).

    10.76       Trex Medical Corporation Equity Incentive Plan (filed as
                Exhibit 10.77 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).

    10.77       Thermo Fibertek Inc. Incentive Stock Option Plan (filed
                as Exhibit 10(k) to Thermo Fibertek's Registration
                Statement on Form S-1 [Reg. No. 33-51172] and
                incorporated herein by reference).

    10.78       Thermo Fibertek Inc. Nonqualified Stock Option Plan
                (filed as Exhibit 10(l) to Thermo Fibertek's
                Registration Statement on Form S-1 [Reg. No. 33-51172]
                and incorporated herein by reference).

    10.79       Thermo Fibertek Inc. Equity Incentive Plan (filed as
                Exhibit 10.60 to the Registrant's Annual Report on Form
                10-K for the fiscal year ended December 31, 1994 [File
                No. 1-9786] and incorporated herein by reference).

                                       30PAGE
<PAGE>
                                  EXHIBIT INDEX

   Exhibit
   Number       Description of Exhibit                                   Page
   ----------   -------------------------------------------------------  ----

    10.80       Thermo Power Corporation (formerly Tecogen Inc.)
                Incentive Stock Option Plan (filed as Exhibit 10(h) to
                Thermo Power's Registration Statement on Form S-1 [Reg.
                No. 33-14017] and incorporated herein by reference).
                (Maximum number of shares issuable in the aggregate
                under this plan and the Thermo Power Nonqualified Stock
                Option Plan is 950,000 shares, after adjustment to
                reflect share increases approved in 1990, 1992 and
                1993).

    10.81       Thermo Power Corporation (formerly Tecogen Inc.)
                Nonqualified Stock Option Plan (filed as Exhibit 10(i)
                to Thermo Power's Registration Statement on Form S-1
                [Reg. No. 33-14017] and incorporated herein by
                reference). (Maximum number of shares issuable in the
                aggregate under this plan and the Thermo Power Incentive
                Stock Option Plan is 950,000 shares, after adjustment to
                reflect share increases approved in 1990, 1992 and
                1993).

    10.82       Thermo Power Corporation Equity Incentive Plan (filed as
                Exhibit 10.63 to the Registrant's Annual Report on Form
                10-K for the fiscal year ended December 31, 1994 [File
                No. 1-9786] and incorporated herein by reference).

    10.83       Thermo Power Corporation - ThermoLyte Corporation
                Nonqualified Stock Option Plan (filed as Exhibit 10.84
                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).

    10.84       ThermoLyte Corporation Equity Incentive Plan (filed as
                Exhibit 10.71 to Thermo Power's Annual Report on Form
                10-K for the fiscal year ended September 30, 1995 [File
                No. 1-10573] and incorporated herein by reference).

    10.85       Thermo TerraTech Inc. (formerly Thermo Process Systems
                Inc.) Incentive Stock Option Plan (filed as Exhibit
                10(h) to Thermo TerraTech's Registration Statement on
                Form S-1 [Reg. No. 33-6763] and incorporated herein by
                reference). (Maximum number of shares issuable in the
                aggregate under this plan and the Thermo TerraTech
                Nonqualified Stock Option Plan is 1,850,000 shares,
                after adjustment to reflect share increases approved in
                1987, 1989 and 1992, 6-for-5 stock splits effected in
                July 1988 and March 1989 and 3-for-2 stock split
                effected in September 1989).



                                       31PAGE
<PAGE>
                                  EXHIBIT INDEX

   Exhibit
   Number       Description of Exhibit                                   Page
   ----------   -------------------------------------------------------  ----

    10.86       Thermo TerraTech Inc. (formerly Thermo Process Systems
                Inc.) Nonqualified Stock Option Plan (filed as Exhibit
                10(i) to Thermo TerraTech's Registration Statement on
                Form S-1 [Reg. No. 33-6763] and incorporated herein by
                reference). (Maximum number of shares issuable in the
                aggregate under this plan and the Thermo TerraTech
                Incentive Stock Option Plan is 1,850,000 shares, after
                adjustment to reflect share increases approved in 1987,
                1989 and 1992, 6-for-5 stock splits effected in July
                1988 and March 1989 and 3-for-2 stock split effected in
                September 1989).

    10.87       Thermo TerraTech Inc. (formerly Thermo Process Systems
                Inc.) Equity Incentive Plan [filed as Exhibit 10.63 to
                Thermedics' Annual Report on Form 10-K for the fiscal
                year ended January 1, 1994 [File No. 1-9567] and
                incorporated herein by reference.) (Maximum number of
                shares issuable is 1,750,000 shares, after adjustment to
                reflect share increase approved in 1994).

    10.88       Thermo TerraTech Inc. (formerly Thermo Process Systems
                Inc.) - Thermo Remediation Inc. Nonqualified Stock
                Option Plan (filed as Exhibit 10(l) to Thermo
                TerraTech's Quarterly Report on Form 10-Q for the fiscal
                quarter ended January 1, 1994 [File No. 1-9549] and
                incorporated herein by reference).

    10.89       Thermo Remediation Inc. Equity Incentive Plan (filed as
                Exhibit 10.7 to Thermo Remediation's Registration
                Statement on Form S-1 [Reg. No. 33-70544] and
                incorporated herein by reference).

    11          Statement re: Computation of earnings per share.

    13          Annual Report to Shareholders for the year ended
                December 30, 1995 (only those portions incorporated
                herein by reference).

    21          Subsidiaries of the Registrant.

    23          Consent of Arthur Andersen LLP.

    27          Financial Data Schedule.



                                                                    Exhibit 11


                         THERMO INSTRUMENT SYSTEMS INC.

                        COMPUTATION OF EARNINGS PER SHARE



                                            1995         1994         1993
                                        -----------  -----------  -----------
   Computation of Fully
     Diluted Earnings per Share
     from Continuing Operations:

   Income:
     Income from continuing operations  $79,304,000  $58,261,000  $42,793,000

     Add: Convertible obligation
          interest, net of tax            5,729,000    6,315,000    4,016,000
                                        -----------  -----------  -----------
     Income from continuing operations 
       applicable to common stock 
       assuming full dilution (a)       $85,033,000  $64,576,000  $46,809,000
                                        -----------  -----------  -----------

   Shares:
     Weighted average shares
       outstanding                       90,577,966   88,173,053   84,205,613
     
     Add: Shares issuable from
          assumed conversion of
          convertible obligations        15,503,734   17,539,251   12,355,881

          Shares issuable from
          assumed exercise of
          options (as determined
          by the application of
          the treasury stock method)        870,643      410,542      685,021
                                        -----------  -----------  -----------
     Weighted average shares
       outstanding, as adjusted (b)     106,952,343  106,122,846   97,246,515
                                        -----------  -----------  -----------
   Fully Diluted Earnings per Share
     from Continuing Operations
     (a) / (b)                          $       .80  $       .61  $       .48
                                        ===========  ===========  ===========
PAGE
<PAGE>
                                                                    Exhibit 11

                         THERMO INSTRUMENT SYSTEMS INC.

                  COMPUTATION OF EARNINGS PER SHARE (continued)


                                            1995         1994         1993
                                        -----------  -----------  -----------
   Computation of Fully
     Diluted Earnings per Share:

   Income:
     Net income                         $79,306,000  $60,220,000  $44,764,000

     Add: Convertible obligation
          interest, net of tax            5,729,000    6,315,000    4,016,000
                                        -----------  -----------  -----------
     Income applicable to common stock
       assuming full dilution (a)       $85,035,000  $66,535,000  $48,780,000
                                        -----------  -----------  -----------

   Shares:
     Weighted average shares
       outstanding                       90,577,966   88,173,053   84,205,613
     
     Add: Shares issuable from
          assumed conversion of
          convertible obligations        15,503,734   17,539,251   12,355,881

          Shares issuable from
          assumed exercise of
          options (as determined
          by the application of
          the treasury stock method)        870,643      410,542      685,021
                                        -----------  -----------  -----------
     Weighted average shares
       outstanding, as adjusted (b)     106,952,343  106,122,846   97,246,515
                                        -----------  -----------  -----------
   Fully Diluted Earnings per Share
     (a) / (b)                          $       .80  $       .63  $       .50
                                        ===========  ===========  ===========





                                                                  Exhibit 13






















                        Thermo Instrument Systems Inc.

          Consolidated Financial Statements as of December 30, 1995




















PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Consolidated Statement of Income


 (In thousands except per share amounts)          1995      1994      1993
 -------------------------------------------------------------------------
 Revenues (Note 14)                           $782,662  $649,992  $529,278
                                              --------  --------  --------

 Costs and Expenses:
   Cost of revenues                            403,443   335,341   269,582
   Selling, general and administrative
     expenses (Note 10)                        220,436   174,490   139,206
   Research and development expenses            54,314    42,924    34,510
                                              --------  --------  --------
                                               678,193   552,755   443,298
                                              --------  --------  --------

 Operating Income                              104,469    97,237    85,980

 Interest Income                                14,646     5,935     3,644
 Interest Expense (includes $5,512,
   $5,384 and $4,327 to parent company)        (18,129)  (15,761)  (14,384)
 Gain on Issuance of Stock by
   Subsidiaries (Note 12)                       20,128     6,469         -
 Gain on Sale of Related Party
   Investments (Note 10)                         2,227     2,000         -
                                              --------  --------  --------
 Income from Continuing Operations Before
   Provision for Income Taxes and Minority
   Interest Expense                            123,341    95,880    75,240
 Provision for Income Taxes (Note 8)            42,713    37,507    32,447
 Minority Interest Expense                       1,324       112         -
                                              --------  --------  --------
 Income from Continuing Operations              79,304    58,261    42,793
 Income from Discontinued Operations
   (less applicable income taxes of $1,655
   in 1994 and $1,662 in 1993) (Note 3)              2     1,959     1,971
                                              --------  --------  --------
 Net Income                                   $ 79,306  $ 60,220  $ 44,764
                                              ========  ========  ========

 Earnings per Share from
   Continuing Operations:
     Primary                                  $    .88  $    .66  $    .51
                                              ========  ========  ========
     Fully diluted                            $    .80  $    .61  $    .48
                                              ========  ========  ========
 Earnings per Share:
     Primary                                  $    .88  $    .68  $    .53
                                              ========  ========  ========
     Fully diluted                            $    .80  $    .63  $    .50
                                              ========  ========  ========
 Weighted Average Shares:
     Primary                                    90,578    88,173    84,206
                                              ========  ========  ========
     Fully diluted                             106,952   106,123    97,247
                                              ========  ========  ========

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





                                      2PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Consolidated Balance Sheet

 (In thousands)                                             1995        1994
 ---------------------------------------------------------------------------
 Assets
 Current Assets:
   Cash and cash equivalents                          $  395,233  $  152,933
   Available-for-sale investments, at quoted
     market value (amortized cost of $15,385)
     (includes $2,904 of related party investments)
     (Notes 2 and 10)                                          -      15,931
   Accounts receivable, less allowances of $12,569
     and $8,779                                          211,906     159,615
   Unbilled contract costs and fees                        3,800       5,903
   Inventories                                           154,914     121,353
   Prepaid expenses                                        9,450       5,388
   Prepaid income taxes (Note 8)                          31,233      28,533
                                                      ----------  ----------
                                                         806,536     489,656
                                                      ----------  ----------

 Property, Plant and Equipment, at Cost, Net             133,677     126,924
                                                      ----------  ----------

 Net Assets of Discontinued Operations (Note 3)                -      34,265
                                                      ----------  ----------

 Patents and Other Assets                                 29,611      22,224
                                                      ----------  ----------

 Cost in Excess of Net Assets of Acquired
   Companies (Notes 4 and 8)                             402,989     338,848
                                                      ----------  ----------
                                                      $1,372,813  $1,011,917
                                                      ==========  ==========


























                                      3PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Consolidated Balance Sheet (continued)

 (In thousands except share amounts)                       1995        1994
 --------------------------------------------------------------------------
 Liabilities and Shareholders' Investment
 Current Liabilities:
   Notes payable (Note 11)                           $   55,822  $   45,953
   Accounts payable                                      55,626      38,594
   Accrued payroll and employee benefits                 33,025      33,085
   Accrued income taxes                                  25,875      29,175
   Accrued installation and warranty expenses            17,962      14,780
   Deferred revenue                                      20,759      14,455
   Other accrued expenses (Note 4)                       94,653      69,309
   Due to parent company                                 12,919      13,999
                                                     ----------  ----------
                                                        316,641     259,350
                                                     ----------  ----------

 Deferred Income Taxes (Note 8)                          20,168      21,347
                                                     ----------  ----------

 Other Deferred Items                                    23,718      19,261
                                                     ----------  ----------

 Long-term Obligations (Note 11):
   Senior obligations, including $140,000 due to
     parent company                                     207,600     210,000
   Subordinated obligations, including $1,334 due
     to parent company in 1994                          214,775      38,196
   Other                                                 18,659      15,363
                                                     ----------  ----------
                                                        441,034     263,559
                                                     ----------  ----------

 Minority Interest                                       28,547       7,637
                                                     ----------  ----------

 Commitments and Contingencies (Note 9)
 Shareholders' Investment (Notes 5 and 6):
   Common stock, $.10 par value, 125,000,000
     shares authorized; 92,566,341 and 48,156,101
     shares issued                                        9,257       4,816
   Capital in excess of par value                       248,468     233,765
   Retained earnings                                    291,890     212,584
   Treasury stock at cost, 917,985 and
     683,742 shares                                      (9,724)    (12,736)
   Cumulative translation adjustment                      2,814       1,991
   Net unrealized gain on available-for-sale
     investments (Note 2)                                     -         343
                                                     ----------  ----------
                                                        542,705     440,763
                                                     ----------   ---------
                                                     $1,372,813  $1,011,917
                                                     ==========  ==========

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








                                      4PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Consolidated Statement of Cash Flows

 (In thousands)                                 1995       1994       1993
 -------------------------------------------------------------------------
 Operating Activities:
   Net income                              $  79,306  $  60,220   $  44,764
   Adjustments to reconcile net income to
     net cash provided by operating
     activities:
       Depreciation and amortization          25,257     22,810      20,719
       Provision for losses on accounts
         receivable                            2,543        733         970
       Gain on issuance of stock by
         subsidiaries (Note 12)              (20,128)    (6,469)          -
       Gain on sale of related 
         party investments (Note 10)          (2,227)    (2,000)          -
       Increase (decrease) in deferred
         income taxes                          2,196      1,816        (497)
       Minority interest expense               1,324        112           -
       Other noncash expenses                  2,964        363       3,507
       Changes in current accounts,
         excluding the effects of
         acquisitions:
           Accounts receivable               (22,661)    (2,586)    (27,716)
           Inventories                        (7,433)     6,422       6,916
           Other current assets                3,058        (12)      7,482
           Accounts payable                    1,202      7,745     (11,143)
           Other current liabilities          (4,968)    (8,315)      7,530
       Other                                    (315)       (84)        132
                                           ---------  ---------   ---------
           Net cash provided by operating
            activities                        60,118     80,755      52,664
                                           ---------  ---------   ---------
 Investing Activities:
   Acquisitions, net of cash acquired
     (Note 4)                                (89,469)  (101,336)   (102,048)
   Proceeds from sale of services
     businesses (Note 3)                      34,267          -           -
   Proceeds from sale of Nicolet
     Biomedical                                    -          -      67,900
   Purchases of available-for-sale
     investments                                   -    (23,105)          -
   Proceeds from sale and maturities of
     available-for-sale investments           17,825     16,250           -
   Purchases of property, plant and
     equipment                               (10,313)    (8,190)     (9,063)
   Other                                         561      1,214       4,930
                                           ---------  ---------   ---------
           Net cash used in investing
            activities                     $ (47,129) $(115,167)   $(38,281)
                                           ---------  ---------    --------











                                      5PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Consolidated Statement of Cash Flows (continued)

 (In thousands)                                 1995       1994        1993
 --------------------------------------------------------------------------
 Financing Activities:
   Proceeds from issuance of Company and
     subsidiaries' common stock (Note 12)  $  41,788  $  17,446   $   2,678
   Net proceeds from issuance of long-term
     obligations                             187,846          -      68,727
   Repayment and repurchase of long-term
     obligations                              (1,373)    (7,948)     (4,482)
   Proceeds from issuance of obligations
     to parent company (Notes 10 and 11)      15,000          -     229,000
   Repayment of obligations to parent
     company(Note 10)                        (15,000)         -    (157,485)
   Purchases of Company common stock               -          -        (836)
                                           ---------  ---------   ---------
           Net cash provided by financing
            activities                       228,261      9,498     137,602
                                           ---------  ---------   ---------

 Exchange Rate Effect on Cash                  1,050        405        (482)
                                           ---------  ---------   ---------
 Increase (Decrease) in Cash and Cash
   Equivalents                               242,300    (24,509)    151,503
 Cash and Cash Equivalents at Beginning
   of Year                                   152,933    177,442      25,939
                                           ---------  ---------   ---------
 Cash and Cash Equivalents at End of Year  $ 395,233  $ 152,933   $ 177,442
                                           =========  =========   =========

 Cash Paid For:
   Interest                                $  16,035  $  14,782   $  12,493
   Income taxes                            $  31,529  $  24,913   $   7,607

 Noncash Activities:
   Conversions of convertible obligations  $  18,321  $  14,107   $  37,371

   Transfer of services businesses to
    Thermo Terra Tech joint venture        $       -  $  31,301   $       -

   Fair value of assets of 
    acquired companies                     $ 161,985  $ 147,696   $ 151,886
   Cash paid for acquired companies          (93,004)  (100,855)   (102,861)
                                           ---------  ---------   ---------
    Liabilities assumed of acquired
     companies                             $  68,981  $  46,841   $  49,025
                                           =========  =========   =========

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









                                      6PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Consolidated Statement of Shareholders' Investment


                                                                  Net Un-
                                                                  realized
                                                                  Gain on
               Common                                             Avail-
               Stock,   Capital in                    Cumulative  able-for-
 (In thou-     $.10 Par Excess of   Retained Treasury Translation sale In-
 sands)        Value    Par Value  Earnings  Stock    Adjustment  vestments
 --------------------------------------------------------------------------
 Balance
   January 2,
   1993       $  2,974   $182,588   $106,357  $(17,127) $ (2,069)  $      -
 Net income          -          -     44,764         -         -          -
 Purchases of
  Company
  common
  stock              -          -          -      (887)        -          -
 Issuance of
  stock under
  employees'
  and directors'
  stock plans       16        498          -     2,164         -          -
 Tax benefit
  related to
  employees'
  and directors'
  stock plans        -      1,815          -         -         -          -
 Conversions of
  convertible
  obligations      189     36,331          -         -         -          -
 Effect of
  three-for-
  two  stock
  split          1,529     (1,529)         -         -         -          -
 Effect of sale
  of Nicolet
  Biomedical         -          -      1,243         -         -          -
 Translation
  adjustment         -          -          -         -      (801)         -
              --------   --------   --------  --------  --------   --------
 Balance
   January 1,
   1994       $  4,708   $219,703   $152,364  $(15,850) $ (2,870)  $      -














                                      7PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Consolidated Statement of Shareholders' Investment (continued)


                                                                   Net Un-
                                                                   realized
                                                                   Gain on
               Common                                              Avail-
               Stock,   Capital in                    Cumulative   able-for-
 (In thou-     $.10 Par Excess of   Retained Treasury Translation  sale In-
 sands)        Value    Par Value  Earnings  Stock    Adjustment   vestments
 ---------------------------------------------------------------------------
 Net income   $      -   $       -  $ 60,220  $      -  $      -   $      -
 Issuance of
  stock under
  employees'
  and directors'
  stock plans        4        (785)        -     3,114         -          -
 Tax benefit
  related to
  employees'
  and directors'
  stock plans        -       1,120         -         -         -          -
 Conversions of
  convertible
  obligations      104      13,727         -         -         -          -
 Effect of change
  in accounting
  principle
  (Note 2)           -          -          -         -         -      1,885
 Change in net
  unrealized gain
  on available-
  for-sale 
  investments
  (Note 2)           -          -          -         -         -     (1,542)
 Translation
  adjustment         -          -          -         -     4,861          -
              --------   --------   --------  --------  --------   --------
 Balance
   December 31,
   1994       $  4,816   $233,765   $212,584  $(12,736) $  1,991   $    343

















                                      8PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Consolidated Statement of Shareholders' Investment (continued)


                                                                   Net Un-
                                                                   realized
                                                                   Gain on
               Common                                              Avail-
               Stock,   Capital in                    Cumulative   able-for-
 (In thou-     $.10 Par Excess of   Retained Treasury Translation  sale In-
 sands)        Value    Par Value  Earnings  Stock    Adjustment   vestments
 ---------------------------------------------------------------------------
 Net income   $      -   $       -  $ 79,306  $      -  $      -   $      -
 Issuance of
  stock under
  employees'
  and directors'
  stock plans        1      (1,023)        -     3,012         -          -
 Tax benefit
  related to
  employees'
  and directors'
  stock plans        -       1,950         -         -         -          -
 Conversions of
  convertible
  obligations      160      17,814         -         -         -          -
 Effect of 
  three-for-
  two stock
  split          2,429      (2,429)        -         -         -          -
 Effect of
  five-for-
  four stock
  split          1,851      (1,851)        -         -         -          -
 Effect of 
  majority-
  owned
  subsidiaries'
  equity trans-
  actions            -         242         -         -         -          -
 Change in net
  unrealized gain
  on available-
  for-sale 
  investments
  (Note 2)           -           -         -         -         -       (343)
 Translation
  adjustment         -           -         -         -       823          -
              --------    --------  --------  --------  --------   --------
 Balance
   December 30,
   1995       $  9,257    $248,468  $291,890  $ (9,724) $  2,814   $      -
              ========    ========  ========  ========  ========   ========



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



                                      9PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Notes to Consolidated Financial Statements


 1.  Nature of Operations and Summary of Significant Accounting Policies

 Nature of Operations
 Thermo Instrument Systems Inc. (the Company) develops, manufactures, and
 markets analytical, monitoring, process control, and imaging, inspection,
 and measurement instruments used to identify and analyze radioactivity,
 complex chemical compounds, toxic metals, and other elements in a broad
 range of liquids and solids, as well as to control, monitor, image,
 inspect, and measure various industrial processes and life sciences
 phenomena.

 Relationship with Thermo Electron Corporation
 The Company was incorporated on May 28, 1986, as a wholly owned subsidiary
 of Thermo Electron Corporation (Thermo Electron). As of December 30, 1995,
 Thermo Electron owned 78,459,585 shares of the Company's common stock,
 representing 86% of such stock outstanding.

 Principles of Consolidation
 The accompanying financial statements include the accounts of the Company,
 its wholly owned subsidiaries, its publicly held ThermoSpectra Corporation
 (ThermoSpectra) subsidiary, and its privately held Thermo BioAnalysis
 Corporation (Thermo BioAnalysis) subsidiary. All material intercompany
 accounts and transactions have been eliminated. The Company accounts for
 investments in businesses in which it owns between 20% and 50% using the
 equity method. The Company's ownership percentages of its majority-owned
 subsidiaries at year-end were as follows:

                                                  1995      1994      1993
 -------------------------------------------------------------------------

 ThermoSpectra                                     72%       86%       100%
 Thermo BioAnalysis                                80%      100%       100%

 Fiscal Year
 The Company has adopted a fiscal year ending the Saturday nearest December
 31. References to 1995, 1994, and 1993 are for the fiscal years ended
 December 30, 1995, December 31, 1994, and January 1, 1994, respectively. 

 Revenue Recognition
 For substantially all of its operations, the Company recognizes revenues
 upon shipment of its products. The Company provides a reserve for its
 estimate of warranty and installation costs at the time of shipment.
 Revenues and profits on substantially all contracts are recognized using
 the percentage-of-completion method. Revenues recorded under the
 percentage-of-completion method were $16,966,000 in 1995, $15,421,000 in
 1994, and $23,218,000 in 1993. 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, including amounts that are billed
 but not paid under retainage provisions. Deferred revenue in the
 accompanying balance sheet consists primarily of unearned revenue on
 service contracts at certain of the Company's subsidiaries. Substantially
 all of the deferred revenue in the accompanying 1995 balance sheet will be
 recognized within one year.

                                      10PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 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.
     If gains have been recognized on issuances 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.

 Income Taxes
 The Company and Thermo Electron have a tax allocation agreement under which
 the Company is included in the consolidated federal and state income tax   
 returns filed by Thermo Electron. The agreement provides that in years in
 which the Company has taxable income, it will pay to Thermo Electron
 amounts comparable to the taxes the Company would have paid if it had filed
 separate tax returns. In years in which the Company incurs a loss, Thermo
 Electron will reimburse the Company the amount the Company would have
 received if it had filed separate tax returns. If Thermo Electron's equity
 ownership of the Company were to drop below 80%, the Company would be
 required to file its own income tax returns. The Company owed $8,096,000  
 and $11,275,000 to Thermo Electron for estimated federal and state income
 tax payments at year-end 1995 and 1994, respectively. These amounts are
 included in accrued income taxes in the accompanying balance sheet.
     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
 Primary earnings per share have been computed based on the weighted average
 number of shares outstanding during the year. Because the effect of the
 assumed exercise of stock options would be immaterial, they have been
 excluded from the primary earnings per share calculation. Fully diluted
 earnings per share assumes the exercise of stock options and conversion of
 the Company's dilutive convertible obligations and elimination of the
 related interest expense.

 Stock Splits
 All share and per share information has been restated to reflect a
 three-for-two stock split, effected in the form of a 50% stock dividend,
 which was distributed in April 1995, and a five-for-four stock split,
 effected in the form of a 25% stock dividend, which was distributed in
 December 1995.




                                      11PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Notes to Consolidated Financial Statements


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

 Cash and Cash Equivalents
 As of December 30, 1995, $336,573,000 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 and have an original maturity of three months or less. The
 repurchase agreement earns a rate based on the Commercial Paper Composite
 Rate plus 25 basis points, set at the beginning of each quarter. As of
 December 30, 1995, the Company's cash equivalents also include investments
 in short-term certificates of deposit of the Company's foreign
 subsidiaries, which have an original maturity of three months or less. Cash
 and cash equivalents are carried at cost, which equals fair market value at
 year-end 1995 and 1994.

 Available-for-sale Investments
 Pursuant to SFAS No. 115, "Accounting for Certain Investments in Debt and
 Equity Securities," effective January 2, 1994, the Company's debt and
 marketable equity securities are accounted for at market value (Note 2).
 Prior to 1994, these investments were carried at the lower of cost or
 market value.

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

 (In thousands)                                              1995      1994
 --------------------------------------------------------------------------
 Raw materials and supplies                              $ 80,959  $ 65,441
 Work in process                                           40,851    27,879
 Finished goods                                            33,104    28,033
                                                         --------  --------
                                                         $154,914  $121,353
                                                         ========  ========

 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 using the straight-line method over the
 estimated useful lives of the property as follows: buildings and
 improvements, 5 to 40 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.






                                      12PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Notes to Consolidated Financial Statements


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

     Property, plant and equipment consist of the following:

 (In thousands)                                              1995      1994
 --------------------------------------------------------------------------
 Land                                                    $ 23,578  $ 23,374
 Buildings                                                 78,075    76,789
 Machinery, equipment and leasehold improvements           87,432    70,744
                                                         --------  --------
                                                          189,085   170,907
 Less: Accumulated depreciation and amortization           55,408    43,983
                                                         --------  --------
                                                         $133,677  $126,924
                                                         ========  ========

 Patents and Other Assets
 Patents and other assets in the accompanying balance sheet include the
 costs of acquired trademarks, patents, and other specifically identifiable
 intangible assets. These assets are amortized using the straight-line
 method over their estimated useful lives, which range from 3 to 20 years.
 These assets were $17,005,000 and $17,032,000, net of accumulated
 amortization of $13,119,000 and $10,501,000, at year-end 1995 and 1994,
 respectively. 

 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 over 40 years. Accumulated
 amortization was $37,976,000 and $28,245,000 at year-end 1995 and 1994,
 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 companies in assessing the recoverability of
 this asset.

 Environmental Liabilities
 The Company accrues for costs associated with the remediation of
 environmental pollution when it is probable that a liability has been
 incurred and the Company's proportionate share of the amount can be
 reasonably estimated. Any recorded liabilities have not been discounted.

 Foreign Currency
 All assets and liabilities of the Company's foreign subsidiaries are
 translated at year-end exchange rates, and revenues and expenses are
 translated at average exchange rates for the year in accordance with SFAS
 No. 52, "Foreign Currency Translation." Resulting translation adjustments
 are reflected as a separate component of shareholders' investment titled
 "Cumulative translation adjustment." Foreign currency transaction gains and
 losses are included in the accompanying statement of income and are not
 material for the three years presented.

 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 and
 disclosure of contingent assets and liabilities at the date of the 


                                      13PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Notes to Consolidated Financial Statements


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

 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 1994 and 1993 have been reclassified to conform to the
 presentation in the 1995 financial statements.


 2.  Available-for-sale Investments

 Effective January 2, 1994, the Company adopted SFAS No. 115, "Accounting
 for Certain Investments in Debt and Equity Securities." In accordance with
 SFAS No. 115, 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 gain on available-for-
 sale investments." Effect of change in accounting principle in the
 accompanying 1994 statement of shareholders' investment represents the
 unrealized gain, net of related tax effects, pertaining to available-
 for-sale investments held by the Company on January 2, 1994.
     Available-for-sale investments in the accompanying 1994 balance sheet
 represent investments in corporate bonds. The difference between the market
 value and the cost basis of available-for-sale investments at December 31,
 1994, was $546,000, which represents gross unrealized gains of $607,000 and
 gross unrealized losses of $61,000 on those investments.
     The cost of available-for-sale investments that were sold was based on
 specific identification in determining realized gains recorded in the
 accompanying statement of income. Gain on sale of related party investments
 in the accompanying statement of income resulted from gross realized gains
 relating to the sale of available-for-sale investments.


 3.  Discontinued Operations

 Effective April 4, 1994, the Company formed an environmental services joint
 venture with Thermo TerraTech Inc. (Thermo TerraTech) (formerly Thermo
 Process Systems Inc.), another public subsidiary of Thermo Electron. The
 joint venture operated under the name Thermo Terra Tech. The Company
 contributed its analytical laboratories and its nuclear health physics and
 environmental science and engineering services businesses. Thermo TerraTech
 contributed its environmental laboratory business, which specializes in
 fast-response testing of petroleum-contaminated soils and groundwater, and
 approximately $31 million in cash and short-term investments.
     Effective April 2, 1995, the Company and Thermo TerraTech dissolved
 their joint venture. Thermo TerraTech then purchased the services
 businesses formerly operated by the joint venture from the Company for
 $34.3 million in cash, which was the net book value of the services
 businesses. The Company owned 49% of the joint venture and accounted for
 its interest in the joint venture using the equity method. Prior to the
 joint venture's formation on April 2, 1994, the Company's services
 businesses comprised its Services segment and were consolidated in the

                                      14PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Notes to Consolidated Financial Statements


 3.   Discontinued Operations (continued)

 Company's financial statements. The sale of the services businesses to
 Thermo TerraTech represents the Company's disposal of its Services segment.
 Accordingly, the operating results of the Company's Services segment for
 the three-month period ended April 2, 1994 and for 1993 and the equity in
 the income of the joint venture recorded by the Company are classified as
 "Income from discontinued operations" in the accompanying statement of
 income. Revenues from the Company's Services segment for the three-month
 period ended April 2, 1994 and for 1993 were $12.2 million and $55.2
 million, respectively.


 4.  Acquisitions

 During 1995, the Company made several acquisitions for an aggregate $93.0
 million in cash.
     In March 1994, the Company acquired several businesses within the
 EnviroTech Measurements & Controls group of Baker Hughes Incorporated
 (Baker Hughes) for a purchase price of $89.7 million in cash. The Company
 acquired the EnviroTech Controls, NORAN Instruments (NORAN), TN
 Technologies, and Tremetrics businesses, which collectively design,
 manufacture, and market a variety of process control, process measurement,
 and laboratory analytical products for use in a wide range of industrial,
 energy, environmental, and research applications. The Company contributed
 the assets acquired and liabilities assumed from NORAN to ThermoSpectra in
 connection with the formation of that company. During 1994, the Company
 made several other acquisitions for an aggregate $11.2 million in cash.
     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 the acquisitions in 1995 and 1994
 exceeded the estimated fair value of the acquired net assets by
 approximately $143 million, which is being amortized 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
 acquisitions completed in fiscal 1995, is subject to adjustment upon
 finalization of the purchase price allocation.
     Based on unaudited data, the following table presents selected
 financial information for the Company and the acquired businesses within
 the EnviroTech Measurements & Controls group of Baker Hughes on a pro forma
 basis, assuming the companies had been combined since the beginning of
 1993. The effect of the acquisitions not included in the pro forma data was
 not material to the Company's results of operations and financial position.

 (In thousands except per share amounts)                     1994      1993
 --------------------------------------------------------------------------
 Revenues                                                $671,676  $657,930
 Income from continuing operations                         56,454    32,299
 Earnings per share from continuing operations:
   Primary                                                    .64       .38
   Fully diluted                                              .59       .37

     The pro forma results are not necessarily indicative of future
 operations or the actual results that would have occurred had the
 acquisition of the acquired businesses within the EnviroTech Measurements

                                      15PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Notes to Consolidated Financial Statements


 4.  Acquisitions (continued)

 & Controls group of Baker Hughes been made at the beginning of 1993.
     Other accrued expenses in the accompanying balance sheet include
 approximately $21 million and $17 million at year-end 1995 and 1994,
 respectively, for estimated severance, relocation, and other reserves
 associated with acquisitions.


 5.  Stock-based Compensation Plans

 The Company has stock-based compensation plans for its key employees,
 directors, and others. Two of these plans, adopted in 1986, permit the
 grant of nonqualified and incentive stock options. A third plan, adopted in
 1993, permits the grant of a variety of stock and stock-based awards as
 determined by the human resources committee of the Company's Board of
 Directors (the Board Committee), including restricted stock, stock options,
 stock bonus shares, or performance-based shares. To date, only nonqualified
 stock options have been awarded under these plans. The option recipients
 and the terms of options granted under these plans are determined by 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. Generally, all
 options have been granted at fair market value. The Company also has a
 directors' stock option plan, adopted in 1991, that provides for the grant
 of stock options in the Company and its majority-owned subsidiaries to
 outside directors pursuant to a formula approved by the Company's
 shareholders. Options in the Company 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 the stock-based compensation plans of Thermo Electron or its
 majority-owned subsidiaries.
     No accounting recognition is given to options granted at fair market
 value until they are exercised. Upon exercise, net proceeds, including tax
 benefits realized, are credited to equity.













                                      16PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Notes to Consolidated Financial Statements


 5.  Stock-based Compensation Plans (continued)

     A summary of the Company's stock option information is as follows:

                        1995                1994                1993
                 ------------------- ------------------- -----------------
                            Range of            Range of           Range of
 (In thousands    Number      Option  Number      Option  Number     Option
 except per           of      Prices      of      Prices      of     Prices
 share amounts)  Shares    per Share Shares    per Share Shares   per Share
 --------------------------------------------------------------------------
 Options out-
   standing,
   beginning
   of year       3,798 $ 3.29-$18.02 3,552 $ 2.85-$18.02 2,005 $ 1.78-$12.43
     Granted         6      18.84      744  15.08- 16.58 2,221  12.64- 18.02
     Exercised    (375)  3.29- 16.68  (353)  2.85- 12.64  (554)  1.78-  9.06
     Lapsed or
       cancelled  (208)  3.29- 16.68  (145)  2.85- 16.68  (120)  2.85- 12.64
                 -----               -----               -----
 Options out-
   standing, end
   of year       3,221 $ 3.35-$18.84 3,798 $ 3.29-$18.02 3,552 $ 2.85-$18.02
                 =====               =====               =====
 Options
   exercisable   3,221 $ 3.35-$18.84 3,791 $ 3.29-$18.02 3,542 $ 2.85-$16.68
                 =====               =====               =====
 Options
  available
  for grant      1,764               1,564               2,166
                 =====               =====               =====


 6.  Common Stock

 At December 30, 1995, the Company had reserved 20,404,319 unissued shares
 of its common stock for possible issuance under stock-based compensation
 plans and for issuance upon possible conversion of the Company's
 convertible obligations.


 7.  Employee Benefit Plans

 Employee Stock Purchase Plan
 Substantially all of the Company's full-time U.S. employees are eligible to
 participate in an employee stock purchase plan sponsored by the Company.
 Prior to the November 1995 plan year, shares of the Company's and Thermo
 Electron's common stock could be purchased at the end of a 12-month plan
 year at 85% of the fair market value at the beginning of the plan year, and
 the shares purchased were subject to a one-year resale restriction.
 Effective November 1, 1995, the applicable shares of common stock may be
 purchased at 95% of the fair market value at the beginning of the plan
 year, and the shares purchased are subject to a six-month resale
 restriction. Shares are purchased through payroll deductions of up to 10%
 of each participating employee's gross wages. During 1995, 1994, and 1993,
 the Company issued 74,826 shares, 97,125 shares, and 189,886 shares,
 respectively, of its common stock under this plan.

                                      17PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Notes to Consolidated Financial Statements


 7.  Employee Benefit Plans (continued)

 401(k) Savings Plan and Employee Stock Ownership Plan
 The majority of the Company's full-time U.S. employees are eligible to
 participate in Thermo Electron's 401(k) savings plan and, prior to 1995, in
 Thermo Electron's employee stock ownership plan (ESOP). 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 $2,769,000,
 $2,774,000, and $2,239,000 in 1995, 1994, and 1993, respectively. Effective
 December 31, 1994, the ESOP was split into two plans: ESOP I, covering
 employees of Thermo Electron's corporate office and its wholly owned
 subsidiaries and ESOP II, covering employees of certain of Thermo
 Electron's majority-owned subsidiaries, including the Company. Also,
 effective December 31, 1994, the ESOP II plan was terminated and as a
 result, the Company's employees are no longer eligible to participate in an
 ESOP. 


 8.  Income Taxes

 The components of income from continuing operations before provision for
 income taxes and minority interest expense are as follows:

 (In thousands)                                   1995      1994      1993
 -------------------------------------------------------------------------
 Domestic                                     $ 95,999  $ 77,840  $ 57,621
 Foreign                                        27,342    18,040    17,619
                                              --------  --------  --------
                                              $123,341  $ 95,880  $ 75,240
                                              ========  ========  ========

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

 (In thousands)                                   1995      1994      1993
 -------------------------------------------------------------------------
 Currently payable:
   Federal                                    $ 29,336  $ 17,682  $ 13,116
   State                                         5,766     5,499     3,784
   Foreign                                      11,490     7,977     6,909
                                              --------  --------  --------
                                                46,592    31,158    23,809
                                              --------  --------  --------

 Net deferred (prepaid):
   Federal                                      (3,628)    5,480     6,413
   State                                          (769)    1,207     1,067
   Foreign                                         518      (338)    1,158
                                              --------  --------  --------
                                                (3,879)    6,349     8,638
                                              --------  --------  --------
                                              $ 42,713  $ 37,507  $ 32,447
                                              ========  ========  ========

     The provision for income taxes that is currently payable does not
 reflect $2,108,000, $1,120,000, and $1,815,000 of tax benefits of the
 Company and its majority-owned subsidiaries allocated to capital in excess 



                                      18PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Notes to Consolidated Financial Statements


 8.  Income Taxes (continued)

 of par value, directly or through the effect of majority-owned
 subsidiaries' equity transactions, in 1995, 1994, and 1993, respectively,
 or $3,000,000 and $1,150,000 of tax benefits used to reduce cost in excess
 of net assets of acquired companies in 1995 and 1993, respectively. The
 deferred provision for income taxes does not reflect $3,375,000 of tax
 benefits used to reduce cost in excess of net assets of acquired companies
 in 1995.
     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% to income from continuing operations before
 provision for income taxes and minority interest expense due to the
 following:

 (In thousands)                                   1995      1994      1993
 -------------------------------------------------------------------------
 Provision for income taxes at statutory rate $ 43,169  $ 33,558  $ 26,334
 Increases (decreases) resulting from:
   State income taxes, net of federal tax        3,248     4,359     3,153
   Net foreign losses not benefited and tax
     rate differential                           2,438       817     1,330
   Tax benefit of foreign sales corporation     (1,987)   (1,602)   (1,134)
   Amortization of cost in excess of net
     assets of acquired companies                2,432     2,089     2,154
   Gain on issuance of stock by subsidiaries    (7,045)   (2,264)        -
   Other, net                                      458       550       610
                                              --------  --------  --------
                                              $ 42,713  $ 37,507  $ 32,447
                                              ========  ========  ========

























                                      19PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Notes to Consolidated Financial Statements


 8.  Income Taxes (continued)

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

 (In thousands)                                   1995      1994
 ---------------------------------------------------------------
 Prepaid income taxes:
   Net operating loss and tax 
    credit carryforwards                      $ 22,549  $ 13,217
   Reserves and accruals                        12,165    10,588
   Inventory basis difference                    9,553    10,412
   Accrued compensation                          4,439     4,460
   Allowance for doubtful accounts               1,454     3,399
   Other, net                                    3,622     1,078
                                              --------  --------
                                                53,782    43,154
   Less: Valuation allowance                    22,549    14,621
                                              --------  --------
                                              $ 31,233  $ 28,533
                                              ========  ========

 Deferred income taxes:
   Depreciation                               $ 14,039  $ 13,321
   Intangible assets                             5,130     5,490
   Other                                           999     2,536
                                              --------  --------
                                              $ 20,168  $ 21,347
                                              ========  ========

     The year-end 1995 valuation allowance relates to uncertainty
 surrounding the realization of $50,299,000 of foreign tax loss
 carryforwards, $1,406,000 of certain state tax-deferred assets, and
 $5,688,000 of federal net operating loss carryforwards, the realization of
 which is limited to the future income of certain subsidiaries. The federal
 net operating loss carryforwards expire in the years 2002 through 2011, and
 any resulting benefit will be used to reduce cost in excess of net assets
 of acquired companies. The increase in the valuation allowance results
 primarily from valuation allowances established for net operating loss
 carryforwards of businesses acquired in 1995. 
     The Company has not recognized a deferred tax liability for the
 differences between the book basis and tax basis of the common stock of its
 domestic subsidiaries (such differences relate 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.
     A provision has not been made for U.S. or additional foreign taxes on
 $44 million of undistributed earnings of foreign subsidiaries that could be
 subject to taxation if remitted to the U.S. because the Company currently
 plans to keep these amounts permanently reinvested overseas. The Company
 believes that any additional U.S. tax liability due upon remittance of such
 earnings would be immaterial due to available U.S. foreign tax credits.





                                      20PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Notes to Consolidated Financial Statements


 9.  Commitments and Contingencies

 Operating Leases
 The Company leases portions of its office and operating facilities under
 various operating lease arrangements. The accompanying statement of income
 includes expenses from operating leases of $11,112,000, $9,028,000, and
 $8,172,000 in 1995, 1994, and 1993, respectively. Future minimum payments
 due under noncancellable operating leases at December 30, 1995, are
 $11,430,000 in 1996; $9,005,000 in 1997; $6,785,000 in 1998; $5,389,000 in
 1999; $4,559,000 in 2000; and $22,541,000 in 2001 and thereafter. Total
 future minimum lease payments are $59,709,000.

 Litigation
 The Company is contingently liable with respect to lawsuits and other
 matters. In the opinion of management, these contingencies will not have a
 material effect upon the financial position of the Company or its results
 of operations.


 10. 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 paid Thermo Electron annually an amount
 equal to 1.20% of the Company's revenues in fiscal 1995 and 1.25% of the
 Company's revenues in fiscal 1994 and 1993. Beginning in fiscal 1996, the
 Company will pay an annual fee equal to 1.0% of the Company's revenues. The
 annual fee is reviewed and adjusted annually by mutual agreement of the
 parties. For these services, the Company was charged $9,392,000,
 $8,277,000, and $7,302,000 in 1995, 1994, and 1993, respectively.
 Management believes that the service fee charged by Thermo 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 relationship 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.

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

 Available-for-sale Investments
 During 1995, the Company sold its remaining investment in 6 1/2%
 subordinated convertible debentures due 1998, which were issued by
 Thermedics Inc. (Thermedics), a majority-owned subsidiary of Thermo
 Electron. The Company sold $2,323,000 principal amount of the Thermedics
 debentures in 1995 for net proceeds of $4,514,000, which resulted in a gain
 of $2,227,000. During 1994, the Company sold $4,000,000 principal amount of

                                      21PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Notes to Consolidated Financial Statements


 10. Related Party Transactions (continued)

 the Thermedics debentures for net proceeds of $5,890,000, which resulted in
 a gain of $2,000,000.

 Short- and Long-term Obligations
 To partially finance the acquisition of Gould Instrument Systems, Inc. in
 May 1995, ThermoSpectra borrowed $15,000,000 from Thermo Electron pursuant
 to a promissory note due May 1996 and bearing interest at the Commercial
 Paper Composite Rate plus 25 basis points, set at the beginning of each
 quarter. This note was repaid in August 1995 with proceeds from
 ThermoSpectra's initial public offering of common stock (Note 12).
     See Note 11 for long-term obligations of the Company held by Thermo
 Electron.


 11. Short- and Long-term Obligations

 Short-term Obligations
 Notes payable in the accompanying balance sheet represent bank borrowings
 at several of the Company's foreign subsidiaries. The weighted average
 interest rate for these borrowings was 4.27% and 5.83% at year-end 1995 and
 1994, respectively.

 Long-term Obligations
 Long-term obligations of the Company are as follows:

 (In thousands except per share amounts)                     1995      1994
 --------------------------------------------------------------------------
 3 3/4% Senior convertible note, due 2000,
   convertible at $16.93 per share (a)                   $140,000  $140,000
 3 3/4% Senior convertible debentures, due 2000,
   convertible at $16.93 per share (b)                     67,600    70,000
 6 5/8% Subordinated convertible debentures, due 2001,
   convertible at $9.38 per share (c)                      22,275    36,862
 7% Subordinated convertible note, due 1996,
   convertible at $2.37 per share (a)                           -     1,334
 5% Subordinated convertible debentures, due 2000,
   convertible into shares of ThermoQuest (c)              96,250         -
 5% Subordinated convertible debentures, due 2000,
   convertible into shares of Thermo Optek (c)             96,250         -
 10.23% Mortgage loan secured by property with a net
   book value of $16,303, payable in monthly 
   installments with final payment in 2004                 10,101    10,855
 Other                                                     10,885     6,276
                                                         --------  --------
                                                          443,361   265,327
 Less: Current maturities of long-term obligations          2,327     1,768
                                                         --------  --------
                                                         $441,034  $263,559
                                                         ========  ========

 (a) Represents an obligation to Thermo Electron.
 (b) Guaranteed on a senior basis by Thermo Electron.
 (c) Guaranteed on a subordinated basis by Thermo Electron.



                                      22PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Notes to Consolidated Financial Statements


 11. Short- and Long-term Obligations (continued)

     In lieu of issuing shares of the Company's common stock upon conversion
 of the 3 3/4% senior convertible debentures due 2000, the Company has the
 option to pay holders of the debentures cash equal to the weighted average
 market price of the Company's common stock on the trading date prior to
 conversion.
     In August and October 1995, the Company's wholly owned ThermoQuest and
 Thermo Optek subsidiaries, respectively, each issued and sold $96.3 million
 principal amount of 5% subordinated convertible debentures due 2000. The
 debentures will be convertible into shares of the respective subsidiary's
 common stock at any time after the later of (1) 180 days after the date of
 the close of the subsidiary's initial public offering of common stock or
 (2) the date of the effectiveness under the Securities Act of 1933 of a
 registration statement covering the resale of shares of the subsidiary's
 common stock issuable upon conversion of the debentures, and prior to
 redemption and maturity. The conversion price of the debentures will be set
 on the date of the closing of the subsidiary's initial public offering of
 common stock and will be equal to 110% of the initial public offering price
 of the subsidiary's common stock. If ThermoQuest's and Thermo Optek's
 initial public offerings have not occurred by August 3, 1996 and October
 12, 1996, respectively, this percentage will decrease by 2.5% on such dates
 and on each anniversary of such dates prior to the subsidiary's initial
 public offering. If ThermoQuest's and Thermo Optek's initial public
 offerings have not occurred by August 1, 1996 and October 1, 1996,
 respectively, the rate of interest borne by the debentures will increase by
 0.5% on such dates and on each anniversary of such dates prior to the
 subsidiary's initial public offering. The debentures 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 guarantees.
     During 1995, 1994, and 1993, convertible obligations of $18,321,000,
 $14,107,000, and $37,371,000, respectively, were converted into common
 stock of the Company.
     The annual requirements for long-term obligations are as follows:

 (In thousands)
 --------------------------------------------------------------------------
 1996                                                              $  2,327
 1997                                                                 2,225
 1998                                                                 1,698
 1999                                                                 1,635
 2000                                                               401,723
 2001 and thereafter                                                 33,753
                                                                   --------
                                                                   $443,361
                                                                   ========

     See Note 13 for the fair value information pertaining to the Company's
 long-term obligations.


 12. Transactions in Stock of Subsidiaries

 In March 1995, Thermo BioAnalysis sold 700,000 shares of its common stock
 in a private placement at $10.00 per share for net proceeds of $6,530,000,
 resulting in a gain of $4,714,000. In April 1995, Thermo BioAnalysis sold

                                      23PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Notes to Consolidated Financial Statements


 12. Transactions in Stock of Subsidiaries (continued)

 901,500 shares of its common stock in a private placement at $10.00 per
 share for net proceeds of $8,388,000, resulting in a gain of $4,831,000.
     In August 1995, ThermoSpectra sold 1,725,000 shares of its common stock
 in an initial public offering at $14.00 per share for net proceeds of
 $21,858,000, resulting in a gain of $9,333,000. In October 1995,
 ThermoSpectra sold 202,000 shares of its common stock in a private
 placement at $15.72 per share for net proceeds of $3,022,000, resulting in
 a gain of $1,250,000.
     In 1994, ThermoSpectra sold 1,505,000 shares of its common stock in
 private placements at $10.00 per share for net proceeds of $13,993,000,
 resulting in a gain of $6,469,000.


 13. Fair Value of Financial Instruments

 The Company's financial instruments consist primarily of cash and cash
 equivalents, accounts receivable, notes payable, accounts payable, due to
 parent company, long-term obligations, and forward exchange contracts. The
 carrying amounts of these financial instruments, with the exception of
 long-term obligations and forward exchange contracts, approximate fair
 value due to their short-term nature.
     Available-for-sale investments are carried at fair value in the
 accompanying 1994 balance sheet. The fair values were determined based on
 quoted market prices. See Note 2 for fair value information pertaining to
 these financial instruments.
     The Company enters into forward exchange contracts to hedge certain
 firm purchase and sale commitments denominated in currencies other than its
 subsidiaries' local currencies, principally U.S. dollars, British pounds
 sterling, French francs, and Japanese yen. The purpose of the Company's
 foreign currency hedging activities is to protect the Company's local
 currency cash flows related to these commitments from fluctuations in
 foreign exchange rates. The amounts of such forward exchange contracts at
 year-end 1995 and 1994 were $12,200,000 and $11,067,000, respectively.
     The carrying amount and fair value of the Company's long-term
 obligations and off-balance-sheet financial instruments are as follows:

                                       1995                 1994
                                ------------------   ------------------
                                Carrying      Fair   Carrying      Fair
 (In thousands)                   Amount     Value     Amount     Value
 ----------------------------------------------------------------------
 Long-term obligations:
  Convertible obligations       $422,375   $595,482  $248,196  $302,528
  Other long-term obligations     18,659     19,122    15,363    15,747
                                --------   --------  --------  --------
                                $441,034   $614,604  $263,559  $318,275
                                ========   ========  ========  ========

 Off-balance-sheet
  financial instruments:
   Forward exchange
     contracts receivable                  $    462            $     57




                                      24PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Notes to Consolidated Financial Statements


 13. Fair Value of Financial Instruments (continued)

     The fair value of long-term obligations was determined based on quoted
 market prices and on borrowing rates available to the Company at the
 respective year-ends. The fair value of convertible obligations exceeds the
 carrying amount primarily due to the market price of the Company's common
 stock at the respective year-ends exceeding the conversion price of the
 convertible obligations.
     The fair value of forward exchange contracts is the estimated amount
 that the Company would receive if it were to terminate the contracts,
 taking into account the change in foreign exchange rates.


 14. Geographical Data

 The Company is engaged in one business segment: developing, manufacturing,
 and marketing analytical, environmental monitoring, and process control
 instruments. The following table shows data for the Company by geographical
 area:

 (In thousands)                                 1995        1994       1993
 --------------------------------------------------------------------------
 Revenues:
     United States                        $  520,485  $  457,121 $  390,707
     Germany                                 124,035      96,338     77,533
     United Kingdom                           78,768      57,752     44,888
     Other Europe                            107,755      72,633     60,437
     Other                                    79,368      59,663     49,150
     Transfers among geographical
      areas (a)                             (127,749)    (93,515)   (93,437)
                                          ----------  ---------- ----------
                                          $  782,662  $  649,992 $  529,278
                                          ==========  ========== ==========

 Income from continuing operations before
   provision for income taxes and 
   minority interest expense:
     United States                        $   81,144  $   86,189 $   75,410
     Germany                                   8,703       3,168      4,116
     United Kingdom                            5,128       3,569      3,700
     Other Europe                             12,505       6,823      3,797
     Other                                     8,203       7,490      6,317
     Corporate and eliminations (b)          (11,214)    (10,002)    (7,360)
                                          ----------  ---------- ----------
     Total operating income                  104,469      97,237     85,980
     Interest and other income
       (expense), net                         18,872      (1,357)   (10,740)
                                          ----------  ---------- ----------
                                          $  123,341  $   95,880 $   75,240
                                          ==========  ========== ==========








                                      25PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Notes to Consolidated Financial Statements


 14. Geographical Data (continued)

 (In thousands)                                 1995        1994       1993
 --------------------------------------------------------------------------
 Identifiable assets:
     United States                        $  888,620  $  595,329 $  512,679
     Germany                                 125,686     114,536    100,042
     United Kingdom                           85,615      46,959     38,905
     Other Europe                             94,135      53,664     42,245
     Other                                    62,090      37,947     32,807
     Corporate and eliminations (c)          116,667     163,482    164,463
                                          ----------  ---------- ----------
                                          $1,372,813  $1,011,917 $  891,141
                                          ==========  ========== ==========

 Export revenues included in United
   States revenues above (d):
     Europe                               $   88,418  $   70,903 $   74,073
     Asia                                     80,839      57,249     41,395
     Other                                    40,303      25,412     20,020
                                          ----------  ---------- ----------
                                          $  209,560  $  153,564 $  135,488
                                          ==========  ========== ==========

 (a) Transfers among geographical areas are accounted for at prices that are
     representative of transactions with unaffiliated parties.
 (b) Primarily corporate general and administrative expenses.
 (c) Primarily cash, cash equivalents, and short-term investments.
 (d) In general, export sales are denominated in U.S. dollars.


 15. Subsequent Event

 On March 1, 1995, the Company entered into an agreement with Fisons plc
 (Fisons) to acquire the Scientific Instruments Division of Fisons for
 approximately 202 million British pounds sterling. On April 13, 1995, the
 Company announced that it had received a "second request" for information
 regarding the transaction from the U.S. Federal Trade Commission (FTC).
 After extensive discussions with Fisons and the FTC, in January 1996 the
 Company withdrew its original pre-merger notification filing under the
 Hart-Scott-Rodino Antitrust Improvements Act (the HSR Act), and submitted a
 new filing with respect to a modified form of the acquisition. On February
 15, 1996, the Company announced that the FTC had granted early termination
 of the waiting period under the HSR Act with respect to the modified
 acquisition and on March 1, 1996, the Company announced that it had
 received clearance from U.K. antitrust regulatory authorities. The form of
 the acquisition cleared by the FTC and the U.K. authorities excludes from
 the businesses to be acquired by the Company substantially all of the mass
 spectrometer businesses of Fisons and a high-resolution mass
 spectrometer/inductively-coupled plasma product. These businesses accounted
 for slightly less than 20% of the 1995 revenues of Fisons' Scientific
 Instruments Division. The new purchase price is expected to be slightly
 less than 150 million British pounds sterling and will be subject to a
 post-closing adjustment based on the net asset value of the acquired
 businesses as of the closing date. The modified acquisition is still
 subject to the consent of certain third parties and the satisfaction of
 other closing conditions.

                                      26PAGE
<PAGE>
 Report of Independent Public Accountants
 --------------------------------------------------------------------------

 To the Shareholders and Board of Directors
 of Thermo Instrument Systems Inc.:

 We have audited the accompanying consolidated balance sheets of Thermo
 Instrument Systems Inc. (a Delaware corporation and 86%-owned subsidiary of
 Thermo Electron Corporation) and subsidiaries as of December 30, 1995 and
 December 31, 1994, and the related consolidated statements of income,
 shareholders' investment, and cash flows for each of the three years in the
 period ended December 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 consolidated 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 Thermo
 Instrument Systems Inc. and subsidiaries as of December 30, 1995 and
 December 31, 1994, and the results of their operations and their cash flows
 for each of the three years in the period ended December 30, 1995, in
 conformity with generally accepted accounting principles.
     As discussed in Note 2 to the consolidated financial statements,
 effective January 2, 1994, the Company changed its method of accounting for
 investments in debt and marketable equity securities.



                                            Arthur Andersen LLP



 Boston, Massachusetts
 February 12, 1996 (except with respect
 to the matter discussed in Note 15 as
 to which the date is March 1, 1996)













                                      27PAGE
<PAGE>

 Thermo Instrument Systems Inc.
 Management's Discussion and Analysis of Financial Condition and Results of
 Operations

 Results of Operations

 The Company's revenues were $782.7 million in 1995, compared with $650.0
 million in 1994 and $529.3 million in 1993. The increases were primarily
 due to acquisitions, which included the Analytical Instruments Division of
 Baird Corporation in January 1995, Gould Instrument Systems, Inc. (GIS) in
 May 1995, the Analytical Instrument Division of Analytical Technology, Inc.
 in December 1995, several businesses within the EnviroTech Measurements &
 Controls group of Baker Hughes Incorporated (Baker Hughes) in March 1994,
 and the radiation safety measurement products and radiometry process
 control divisions of FAG Kugelfischer Georg Shafer AG in October 1993.
 Acquisitions added revenues of $104 million in 1995 and $125 million in
 1994. The 1993 results included $12.6 million of revenues from the
 biomedical instruments products business of the Company's Nicolet
 Instrument Corporation subsidiary (Nicolet Biomedical), which was sold to
 Thermo Electron Corporation (Thermo Electron) effective April 5, 1993. The
 remainder of the increase in revenues in 1995 was substantially a result of
 the favorable effects of currency translation due to the decline in the
 value of the U.S. dollar relative to foreign currencies in countries where
 the Company operates. Approximately 50% of the Company's revenues originate
 outside of the United States. Although the Company seeks to charge its
 customers in the same currency as its operating costs, 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. Where appropriate, the Company uses forward
 exchange contracts to reduce its exposure to currency fluctuations. An
 increase in revenues in 1995 from certain existing businesses was offset in
 part by a decline in revenues from the Company's air monitoring instruments
 subsidiary as most orders in response to Phases I and II of the Clean Air
 Act of 1990 have been completed.

     The gross profit margin remained relatively unchanged at 48% in 1995
 and 1994 and 49% in 1993. If the Company completes the modified acquisition
 of the Scientific Instruments Division of Fisons plc (Fisons) (Note 15),
 the Company expects that the gross profit margin will decline due to lower
 margins at the businesses to be acquired from Fisons.

     Selling, general and administrative expenses as a percentage of
 revenues increased to 28% in 1995 from 27% in 1994 and 26% in 1993
 primarily due to higher costs as a percentage of revenues at acquired
 businesses and reduced revenues from the Company's air monitoring
 instruments subsidiary as discussed above. The Company's goal is to
 continue to reduce selling, general and administrative expenses as a
 percentage of revenues at its newly acquired businesses. If the Company
 completes the modified acquisition of the Scientific Instruments Division
 of Fisons, the Company expects that selling, general and administrative
 expenses will increase as a percentage of revenues. The Company intends to
 take steps to reduce costs at the businesses acquired from Fisons. These
 reductions are expected to take at least several quarters to implement, and
 no assurance can be given that these reductions will be sufficient to bring
 selling, general and administrative expenses as a percentage of revenues at
 the businesses acquired from Fisons to a level comparable to that of the
 Company's existing businesses.

     Research and development expenses as a percentage of revenues were 6.9%
 in 1995, compared with 6.6% in 1994 and 6.5% in 1993. The increase is
 consistent with the Company's objective to develop and market new products.

                                      28PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Management's Discussion and Analysis of Financial Condition and Results of
 Operations

 Results of Operations (continued)

     Interest income was $14.6 million in 1995, $5.9 million in 1994, and
 $3.6 million in 1993. The increase in 1995 was primarily the result of
 interest income earned on the net proceeds from the issuance of $192.5
 million aggregate principal amount of 5% subordinated convertible
 debentures by the Company's ThermoQuest Corporation (ThermoQuest) and
 Thermo Optek Corporation (Thermo Optek) subsidiaries in August 1995 and
 October 1995, respectively, and higher prevailing interest rates in 1995
 compared with 1994. Interest income also increased in 1995, to a lesser
 extent, as a result of interest income earned on the net proceeds from the
 issuance of common stock by the Company's Thermo BioAnalysis Corporation
 (Thermo BioAnalysis) subsidiary in the first and second quarters of 1995
 and by the Company's ThermoSpectra Corporation (ThermoSpectra) subsidiary
 in the third quarter of 1995 and the third and fourth quarters of 1994. The
 increase was offset in part by a reduction in cash as a result of the
 acquisitions of the Analytical Instruments Division of Baird Corporation in
 January 1995 and GIS in May 1995. The increase in interest income in 1994
 was primarily a result of interest income earned on the net proceeds from
 the issuance of 3 3/4% senior convertible obligations in September 1993,
 offset in part by the cash used to purchase several businesses within the
 EnviroTech Measurements & Controls group of Baker Hughes in the first
 quarter of 1994. Interest expense increased to $18.1 million in 1995 from
 $15.8 million in 1994 and $14.4 million in 1993. The increase in 1995 was
 primarily due to the issuance of the 5% subordinated convertible debentures
 by ThermoQuest and Thermo Optek, offset in part by the conversion of a
 portion of the Company's 6 5/8% subordinated convertible debentures and
 3 3/4% senior convertible obligations into common stock of the Company. The
 increase in interest expense in 1994 was primarily due to the issuance of
 the 3 3/4% senior convertible obligations in September 1993, offset in part
 by a reduction in interest expense as a result of the repayment in the
 third quarter of 1993 of debt incurred in connection with acquisitions. 

     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 subsidiary 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 subsidiaries, the Company
 recorded gains of $20.1 million in 1995 and $6.5 million in 1994 (Note 12).
 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 realize gains from such
 transactions in the future.

      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,
 including the following: (i) 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 and (ii) under certain circumstances, acquisitions could be 

                                      29PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Management's Discussion and Analysis of Financial Condition and Results of
 Operations

 Results of Operations (continued)

 structured to significantly reduce the goodwill that is recorded and
 consequently reduce the Company's future goodwill amortization associated
 with the acquisition. The Company typically acquires technology companies
 which are often characterized by significant amounts of goodwill. In
 addition, under the Proposed Statement a company that has made certain
 equity investments of generally less than 20% ownership would record a gain
 (or loss) upon increasing its investment level to the point of exerting
 "significant influence," generally 20% or higher.

     The FASB conducted a hearing concerning the Proposed Statement in
 February 1996, at which Thermo Electron, along with other major companies
 and many of the major accounting firms and accounting associations,
 expressed their disagreement with various parts of the Proposed Statement.
 The FASB expects to issue a final statement by June 30, 1996, which could
 become effective for fiscal years beginning after December 15, 1996.

     The Company recorded gains of $2.2 million and $2.0 million in 1995 and
 1994, respectively, from the sale of the Company's investment in Thermedics
 Inc. convertible debentures. Thermedics Inc. is a majority-owned subsidiary
 of Thermo Electron.

     The effective tax rate was 35% in 1995, 39% in 1994, and 43% in 1993.
 The effective tax rate decreased in 1995 and 1994 primarily due to the
 nontaxable gains on the issuance of stock by subsidiaries. Excluding the
 impact of the gains on the issuance of stock by subsidiaries, the effective
 tax rates exceeded the statutory federal income tax rate primarily due to
 the impact of state income taxes, nondeductible amortization of cost in
 excess of net assets of acquired companies, and the inability to provide a
 tax benefit on losses incurred at certain foreign subsidiaries.

     Effective April 2, 1995, the Company and Thermo TerraTech Inc. (Thermo
 TerraTech) (formerly Thermo Process Systems Inc.) dissolved their Thermo
 Terra Tech joint venture. Thermo TerraTech then purchased the services
 businesses formerly operated by the joint venture from the Company. Prior
 to the joint venture's formation on April 2, 1994, the Company's services
 businesses comprised its Services segment and were consolidated in the
 Company's financial statements. The sale of the businesses to Thermo
 TerraTech represents the Company's disposal of its Services segment
 (Note 3).

 Liquidity and Capital Resources

 Consolidated working capital was $489.9 million at December 30, 1995,
 compared with $230.3 million at December 31, 1994, an increase of $259.6
 million. Included in working capital are cash, cash equivalents, and
 available-for-sale investments of $395.2 million at December 30, 1995 and
 $168.9 million at December 31, 1994. Of the $395.2 million balance at
 December 30, 1995, $20.3 million was held by ThermoSpectra, $19.8 million
 by Thermo BioAnalysis, $120.4 million by ThermoQuest, $115.1 million by
 Thermo Optek, and $119.6 million by the Company and its wholly owned
 subsidiaries. Cash provided by operations in 1995 was $60.1 million.


     The Company's investing activities used $47.1 million of cash in 1995.
 During 1995, the Company expended $89.5 million for acquisitions and $10.3

                                      30PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Management's Discussion and Analysis of Financial Condition and Results of
 Operations

 Liquidity and Capital Resources (continued)

 million for the purchase of property, plant and equipment. Additionally,
 during 1995, the Company and Thermo TerraTech dissolved their Thermo Terra
 Tech joint venture and the Company sold its services businesses formerly
 operated by the joint venture to Thermo TerraTech for $34.3 million in
 cash.

     The Company's financing activities provided $228.3 million of cash in
 1995. In March and April 1995, Thermo BioAnalysis completed private
 placements of its common stock for net proceeds of $14.9 million. In August
 and October 1995, ThermoSpectra sold shares of its common stock in an
 initial public offering and a private placement for aggregate net proceeds
 of $24.9 million. (Note 12) In August and October 1995, ThermoQuest and
 Thermo Optek, respectively, each issued and sold $96.3 million principal
 amount of 5% subordinated convertible debentures due 2000 for net proceeds
 of $93.9 million.

     In February 1996, Thermo BioAnalysis acquired Dynatech Laboratories
 Worldwide (DLW) from Dynatech Corporation for $43 million in cash, subject
 to post-closing adjustments. To partially finance the acquisition of DLW,
 Thermo BioAnalysis borrowed $30 million from Thermo Electron pursuant to a
 promissory note due February 1997 and bearing interest at the Commercial
 Paper Composite Rate plus 25 basis points.

     In February 1996, ThermoQuest filed a registration statement under the
 Securities Act of 1933 with the Securities and Exchange Commission covering
 shares of common stock to be offered in its initial public offering.

     In 1996, the Company plans to make expenditures of approximately $11.5
 million for property, plant and equipment. The Company believes that its
 existing resources are sufficient to meet the capital requirements of its
 existing operations for the foreseeable future. 

     The Company has historically complemented internal development with
 acquisitions of businesses or technologies that extend the Company's
 presence in current markets or provide opportunities to enter and compete
 effectively in new markets. The Company will consider making acquisitions
 of such businesses or technologies that are consistent with its plans for
 strategic growth. On February 15, 1996, the Company announced that the
 Federal Trade Commission had granted early termination of the waiting
 period under the Hart-Scott-Rodino Antitrust Improvements Act with respect
 to the previously announced modified acquisition of the Scientific
 Instruments Division of Fisons plc (Fisons) and on March 1, 1996, the
 Company announced that it had received clearance of the transaction from
 U.K. antitrust regulatory authorities (Note 15). It is the Company's intent
 in the future to sell a portion of the businesses to be acquired from
 Fisons to the Company's majority- and wholly owned subsidiaries, although
 the size and timing of these transactions will be subject to negotiation
 between the Company and its subsidiaries. The Company intends to fund the
 purchase price of this acquisition, which is expected to be slightly less
 than 150 million British pounds sterling, from available cash and through
 borrowings from Thermo Electron. Borrowings from Thermo Electron will be at
 prevailing market rates at the time funds are advanced.




                                      31PAGE
<PAGE>
 Thermo Instrument Systems Inc.
 Selected Financial Information


 (In thousands except
 per share amounts)     1995(a)(b)  1994(c)(d)  1993(e)    1992(f)      1991
 ---------------------------------------------------------------------------
 Statement of
  Income Data:
   Revenues        $  782,662  $  649,992  $  529,278 $  368,532  $  283,613
   Income from
    continuing
    operations         79,304      58,261      42,793     31,666      24,752
   Net income          79,306      60,220      44,764     33,130      24,837
   Earnings per
    share from
    continuing
    operations:
     Primary              .88         .66         .51        .39         .32
     Fully diluted        .80         .61         .48        .38         .31
   Earnings per
    share:
     Primary              .88         .68         .53        .41         .33
     Fully diluted        .80         .63         .50        .39         .31

            
 Balance Sheet
  Data:
   Working capital $  489,895  $  230,306  $  238,053 $   68,412  $  197,391
   Total assets     1,372,813   1,011,917     891,141    686,425     497,959
   Long-term
    obligations       441,034     263,559     286,161    170,092     123,476
   Shareholders'
    investment        542,705     440,763     358,055    272,723     250,954



 See notes located below "Quarterly Information" on the following page.






















                                      32PAGE
<PAGE>
 Thermo Instrument Systems Inc.


 Quarterly Information (Unaudited)
 (In thousands except per share amounts)


 1995(b)                                First    Second      Third    Fourth
 ---------------------------------------------------------------------------
 Revenues                            $172,944  $185,744   $193,899  $230,075
 Gross profit                          84,914    90,916     93,535   109,854
 Income from continuing operations     16,914    18,673     21,881    21,836
 Net income                            16,916    18,673     21,881    21,836
 Earnings per share from
   continuing operations:
     Primary                              .19       .21        .24       .24
     Fully diluted                        .17       .19        .22       .22
 Earnings per share:
     Primary                              .19       .21        .24       .24
     Fully diluted                        .17       .19        .22       .22


 1994(d)                                First    Second(c)   Third    Fourth
 ---------------------------------------------------------------------------
 Revenues                            $147,587  $162,615   $161,580  $178,210
 Gross profit                          72,670    78,787     77,565    85,629
 Income from continuing operations     12,476    13,564     14,532    17,689
 Net income                            12,852    14,084     15,104    18,180
 Earnings per share from
   continuing operations:
     Primary                              .14       .15        .16       .20
     Fully diluted                        .13       .14        .15       .18
 Earnings per share:
     Primary                              .15       .16        .17       .20
     Fully diluted                        .14       .15        .16       .19

 (a) Reflects the August and October 1995 issuance of $192,500,000 aggregate
     principal amount of 5% subordinated convertible debentures due 2000 by
     ThermoQuest Corporation and Thermo Optek Corporation, respectively.
 (b) Results include nontaxable gains of $4,714,000, $4,831,000, $9,333,000,
     and $1,250,000 in the first, second, third, and fourth quarters,
     respectively, from the issuance of stock by subsidiaries.
 (c) Reflects the March 1994 acquisition of several businesses within the
     EnviroTech Measurements & Controls group of Baker Hughes Incorporated.
 (d) Results include nontaxable gains of $3,284,000 and $3,185,000 in the
     third and fourth quarters, respectively, from the issuance of stock by
     subsidiary.
 (e) Reflects the February 1993 acquisition of Spectra-Physics Analytical,
     Inc., the April 1993 sale of the biomedical instruments products
     business of the Company's Nicolet Instrument Corporation subsidiary,
     and the September 1993 issuance of $210,000,000 aggregate principal
     amount of 3 3/4% senior convertible obligations due 2000.
 (f) Reflects the August 1992 acquisition of Nicolet Instrument Corporation.







                                      33PAGE
<PAGE>
 Thermo Instrument Systems Inc.


 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 THI)
 for 1995 and 1994. Prices were restated in 1995 to reflect a three-for-two
 stock split distributed in April 1995 and a five-for-four stock split
 distributed in December 1995.

                        1995                            1994
               ----------------------         -----------------------
 Quarter         High         Low               High            Low
 --------------------------------------------------------------------
 First         $18 13/15    $15 13/15         $18 8/15       $15 1/15
 Second         20  1/5      17  1/5           17             14 7/15
 Third          22  2/5      19  4/5           17 1/5         14 2/3   
 Fourth         27  1/10     21  1/2           17             15 4/15

     As of January 26, 1996, the Company had 2,900 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 January 26, 1996, was $27 1/8 per share.

 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 issuances of stock certificates, changes of ownership, lost stock
 certificates, and changes 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 Thermo Instrument Systems Inc. who desire information about
 the Company are invited to contact John N. Hatsopoulos, Chief Financial
 Officer, Thermo Instrument Systems Inc., 81 Wyman Street, Post Office Box
 9046, Waltham, Massachusetts 02254-9046, (617) 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 reports and press
 releases are also available through the Internet at Thermo Electron's home
 page on the World Wide Web (http://www.thermo.com).

 Dividend Policy

 The Company has never paid cash dividends 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.



                                      34PAGE
<PAGE>
 Thermo Instrument Systems Inc.


 Form 10-K Report

 A copy of the Annual Report on Form 10-K for the fiscal year ended December
 30, 1995, as filed with the Securities and Exchange Commission, may be
 obtained at no charge by writing to John N. Hatsopoulos, Chief Financial
 Officer, Thermo Instrument Systems Inc., 81 Wyman Street, Post Office Box
 9046, Waltham, Massachusetts 02254-9046.

 Annual Meeting

 The annual meeting of shareholders will be held on Sunday, May 19, 1996, at
 6:30 p.m. at the Turnberry Isle Resort & Club, Aventura, Florida.












































                                      35<PAGE>

                                                                      Exhibit 21
Thermo Instrument Systems Inc. - Subsidiaries of the Registrant
At March 6, 1996, Thermo Instrument Systems Inc. owned the following companies:

                                                      STATE OR
                                                     JURISDICTION 
                                                         OF         PERCENT OF 
                         NAME                       INCORPORATION    OWNERSHIP
- ------------------------------------------------------------------------------
   Thermo Instrument Systems Inc.                    Delaware         85.61**
      Analytical Instrument Development, Inc.        Pennsylvania       100
      ATI Acquisition Corp.                          Wisconsin          100
        Mattson Instruments Limited                  United Kingdom     100
        Unicam Analytical Inc.                       Canada             100
        Unicam Analytical Technology Netherlands     Netherlands        100
         B.V.
        Unicam Analytische System GmbH               Germany            100
        Unicam France S.A.                           France             100
        Unicam Italia SpA                            Italy              100
        Unicam S.A.                                  Belgium            100
        Unicam Technology Limited                    United Kingdom     100
           Unicam Limited                            United Kingdom     100
             Unicam Export Limited                   United Kingdom     100
      Eberline Instrument Company Limited            United Kingdom     100
      Eberline Instrument Corporation                New Mexico         100
      Epsilon Industrial Inc.                        Texas              100
      Gamma-Metrics                                  California         100
        Gamma-Metrics International F.S.C. Inc.      Guam               100
      Gas Tech Inc.                                  California         100
        Gas Tech Australia, Pty. Ltd.                Australia          50
        Gas Tech Partnership                         California         50*
        Gastech Instruments Canada Ltd.              Canada             100
      Houston Atlas Inc.                             Texas              100
      National Nuclear Corporation                   California         100
      Optek-Nicolet Holdings Inc.                    Wisconsin          100
        Thermo Optek Corporation                     Delaware           100
           Nicolet Instrument Corporation            Wisconsin          100
             Nicolet Japan K.K.                      Japan              100
             Spectra-Tech, Europe Limited            United Kingdom     100
             Spectra-Tech, Inc.                      Wisconsin          100
           Nicolet Instrument GmbH                   Germany            100
           Nicolet Instrument S.A.R.L.               France             100
           Thermo Instrument Systems Japan Holdings, Delaware           100
            Inc.
             Nippon Jarrell-Ash Company, Ltd.        Japan              100
           Thermo Jarrell Ash Corporation            Massachusetts      100
             Baird Do Brazil Representacoes Ltda.    Brazil             100
             Beijing Baird Analytical Instrument     China              100
              Technology Co. Limited
             Thermo Instrument Systems (F.E.)        China              100
              Limited
             Thermo Instruments (Canada) Inc.        Canada             100
                Eberline Instruments (Canada) Ltd.   Canada             100
           Thermo Optek Ltd.                         United Kingdom     100
             Nicolet Instrument Limited              United Kingdom     100
             Planweld Limited                        United Kingdom     100
                Hilger Analytical Limited            United Kingdom     100

                                                                Page 1PAGE
<PAGE>
Thermo Instrument Systems Inc. - Subsidiaries of the Registrant
At March 6, 1996, Thermo Instrument Systems Inc. owned the following companies:

                                                        STATE OR
                                                       JURISDICTION 
                         NAME                              OF       PERCENT OF 
                                                      INCORPORATION  OWNERSHIP
- ------------------------------------------------------------------------------
             Thermo Electron Limited                 United Kingdom     100
           Thermo Vision Corporation                 Delaware           100
             CID Technologies Inc.                   New York           100
             Oriel Corporation                       Delaware           100
                Andor Technology Limited             United Kingdom    51.25
                Oriel Foreign Sales Corp.            U. S. Virgin       100
                                                     Islands
             Scientific Measurement Systems Inc.     Colorado           100
        ThermoSpectra Corporation                    Delaware         72.39**
           Beleggingsmaatschappij Zeis B.V.          Netherlands        100
             Bakker Electronics Dongen B.V.          Netherlands        100
                Bakker Electronics Limited           United Kingdom     100
           Diametrix Detectors, Inc.                 Delaware           50
           Gould Instrument Systems, Inc.            Ohio               100
             Gould Instrument Systems GmbH           Germany            100
                NORAN Instruments GmbH               Germany            100
             Gould Instrument Systems Limited        United Kingdom     100
                Nicolet Technologies Ltd.            United Kingdom     100
             Gould Instruments S.A.                  France             100
           Nicolet Instrument Technologies Inc.      Wisconsin          100
           Nicolet Technologies S.A.R.L.             France             100
           NORAN Instruments Inc.                    Wisconsin          100
      Quest-Finnigan Holdings Inc.                   Virginia           100
      Quest-TSP Holdings Inc.                        Delaware           100
        ThermoQuest Corporation                      Delaware           100
        (50% of which shares are owned
         directly by Quest-Finnigan Holdings Inc.)
           Extrel FTMS, Inc.                         Delaware           100
           Finnigan Corporation                      Delaware           100
             Finnigan Instruments, Inc.              New York           100
             Finnigan International Sales, Inc.      California         100
             Finnigan MAT China, Inc.                California         100
             Finnigan MAT (Delaware), Inc.           Delaware           100
             Finnigan MAT Instruments, Inc.          Nevada             100
             Finnigan MAT International Sales, Inc.  California         100
             Finnigan MAT (Nevada), Inc.             Nevada             100
                Finnigan MAT AG                      Switzerland        100
                Finnigan MAT Canada, Ltd.            Canada             100
                Finnigan MAT S.A.R.L.                France             100
                Finnigan MAT S.R.L.                  Italy              100
                  Thermo Separation Products S.R.L.  Italy              100
                Thermo Instruments Australia Pty.    Australia          100
                 Limited
                ThermoQuest Ltd.                     United Kingdom     100
                  Finnigan MAT Ltd.                  United Kingdom     100
                     Finnigan MAT AB                 Sweden             100
                  Thermo Separation Products Ltd.    United Kingdom     100
             Finnigan Properties, Inc.               California         100

                                                                Page 2PAGE
<PAGE>
Thermo Instrument Systems Inc. - Subsidiaries of the Registrant
At March 6, 1996, Thermo Instrument Systems Inc. owned the following companies:

                                                        STATE OR
                                                       JURISDICTION 
                         NAME                              OF       PERCENT OF 
                                                      INCORPORATION  OWNERSHIP
- -----------------------------------------------------------------------------   
           Thermo Instrument Systems (France) S.A.   France             100
             Thermo Separation Products S.A.         France             100
           Thermo Separation Products AG             Switzerland        100
           Thermo Separation Products Inc.           Delaware           100
           ThermoQuest GmbH                          Germany            100
             Finnigan MAT GmbH                       Germany            100
             Thermo Separation Products GmbH         Germany            100
           ThermoQuest K.K.                          Japan              100
      SID Instruments Inc.                           Delaware           100
        ARL Inc.                                     Delaware           100
        FI Instruments Inc.                          Delaware           100
        FI Ltd.                                      United Kingdom     100
        HB Instruments Inc.                          Delaware           100
        Masslab Limited                              United Kingdom     100
        NK Instruments Inc.                          Delaware           100
        Thermo Elemental Limited                     United Kingdom     100
        Thermo FAST UK Limited                       United Kingdom     100
        Thermo Haake Ltd.                            United Kingdom     100
        Thermo Labsystems Limited                    United Kingdom     100
        Thermo SID (Australia) Pty. Ltd.             Australia          100
      Spectrace Instruments Inc.                     California         100
      Thermo BioAnalysis Corporation                 Delaware         80.23**
       (7% of which shares are owned directly by
       Quest-TSP Holdings Inc. and 3% of which
       shares are owned directly by Quest-Finnigan
       Holdings Inc.)
        BioAnalysis International Sales Inc.         Delaware           100
        DLW Inc.                                     Virginia           100
        Dynatech Deutschland GmbH                    Germany            100
        Dynatech Laboratories spol. s.r.o.           Czech Republic     100
        Thermo BioAnalysis (Guernsey) Limited        Channel            100
                                                     Islands
        Thermo BioAnalysis Ltd.                      United Kingdom     100
        Thermo BioAnalysis S.A.                      France             100
      Thermo Environmental Instruments Inc.          California         100
      Thermo Instrument Controls Inc.                Delaware           100
        Thermo Instrument Controls de Mexico, S.A.   Mexico             100
         de C.V. (1% of which shares are owned
         directly by Thermo Instrument Systems
         Inc.)
      Thermo Instruments do Brasil Ltda.             Brazil             100
       (1% of which shares are owned directly
       by Thermo Jarrell Ash Corporation)
      Thermo Instruments F.S.C. Inc.                 U.S. Virgin        100
                                                     Islands
      TN Technologies Inc.                           Texas              100
        TN Technologies Canada Inc.                  Canada             100
      Van Hengel Holding B.V.                        Netherlands        100

                                                                Page 3PAGE
<PAGE>
Thermo Instrument Systems Inc. - Subsidiaries of the Registrant
At March 6, 1996, Thermo Instrument Systems Inc. owned the following companies:

                                                        STATE OR
                                                       JURISDICTION 
                         NAME                              OF       PERCENT OF 
                                                      INCORPORATION  OWNERSHIP
- ------------------------------------------------------------------------------
        Baird Europe B.V.                            Netherlands        100
           Baird France S.A.R.L.                     France             100
        Thermo Instrument Systems B.V.               Netherlands        100
           Euroglas B.V.                             Netherlands        100
           Hilkomij B.V.                             Netherlands        100
           NORAN Instruments B.V.                    Netherlands        100
           Thermo Automation Services  (ThAS) B.V.   Netherlands        100
           Van Oortmerssen B.V.                      Netherlands        100
        Thermo Instrument Systems GmbH               Germany            100
         (24% of which shares are owned directly
         by Thermo Instrument Systems Inc.)
           Eberline Instruments GmbH                 Germany            100
           Thermo Instruments GmbH                   Germany            100
        Thermo Jarrell Ash (Europe) B.V.             Netherlands        100
        Thermo Jarrell Ash, S.A.                     Spain              100
        Thermo Separation Products B.V.              Netherlands        100
           Thermo Separation Products B.V. B.A.      Belgium            100
        TN Spectrace Europe B.V.                     Netherlands        100
      Westronics Inc.                                Texas              100

 
* Joint Venture/Partnership                         ** As of 12/30/95






























                                                                    Exhibit 23


                    Consent of Independent Public Accountants


        As independent public accountants, we hereby consent to the
   incorporation by reference of our reports dated February 12, 1996 (except
   with respect with the matter discussed in Note 15 as to which the date is
   March 1, 1996), included in or incorporated by reference into Thermo
   Instrument Systems Inc.'s Annual Report on Form 10-K for the year ended
   December 30, 1995, into the Company's previously filed Registration
   Statements as follows: Registration Statement No. 33-14980 on Form S-8,
   Registration Statement No. 33-16461 on Form S-8, Registration Statement No.
   33-14974 on Form S-8, Post Effective Amendment to Registration Statement on
   Form S-4 No. 33-32579-02 on Form S-8, Registration Statement No. 33-33577
   on Form S-8, Registration Statement No. 33-36221 on Form S-8, Registration
   Statement No. 33-37866 on Form S-8, Registration Statement No. 33-42270 on
   Form S-3, and Registration Statement No. 33-69526 on Form S-3.



                                                Arthur Andersen LLP



   Boston, Massachusetts
   March 11, 1996


<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THERMO
INSTRUMENT SYSTEMS INC.'S ANNUAL REPORT ON FORM 10-K FOR THE YEAR ENDED
DECEMBER 30, 1995 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-30-1995
<PERIOD-END>                               DEC-30-1995
<CASH>                                         395,233
<SECURITIES>                                         0
<RECEIVABLES>                                  224,475
<ALLOWANCES>                                    12,569
<INVENTORY>                                    154,914
<CURRENT-ASSETS>                               806,536
<PP&E>                                         189,085
<DEPRECIATION>                                  55,408
<TOTAL-ASSETS>                               1,372,813
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