3M Company Ai Cambridge Ltd. Alltech Associates Inc. AMBIS Inc. American Gas & Chemical Co. Ltd. Anspec Co. Inc. Antek Instruments Inc. Arizona Instrument Corp. (AZI) Assay Technology Inc. Astro International Corp. B&H Labo. Co. Ltd. Bio-Rad Laboratories Inc. Bruel & Kjaer Instruments Bruker Instruments Inc. Buck Scientific Inc. Carlo Erba/Fisons Instruments CDS Analytical Inc. CEA Instruments Inc. Chromato-Sud Chrompack International B.V. Clean Air Engineering Dani Strumentazione Analitica SpA DYNA LABS Inc. ES Industries Fisons Instruments Inc. Foxboro Co. G.I.R.A. Galileo Electro-Optics Corp. Gerstel GmbH GOW-MAC Instrument Co. Haake/Fisons Instruments Herrmann-Moritz Hewlett-Packard Co. HNU Systems Inc. IN/US Systems Inc. Infraspec Ltd. International Equipment Trading Ltd. Interscan Corp. Ion Science Ltd. K and M Electronics Inc. Kontron Instruments SpA Leeds & Northrup LINC Quantum Analytics LND Inc. MAST/KEYSTONE Inc. Mast Development Div. Matheson Gas Products Inc. MG Industries Specialty Gas Div. MSA Instrument Division OI Analytical Orthodyne P.J. Cobert Associates Inc. Packard Instrument Co. Inc./Canberra Perkin-Elmer Corp. Photovac International Inc. Raytest Isotopenmessgerate GmbH Regis Technologies Inc. Scott Specialty Gases Inc. Sensidyne Inc. Servomex Co. Shimadzu Scientific Instruments Inc. Sieger Ltd. Siemens AG Sievers Instruments Inc. SODEXIM S.A. SRI Instruments Strohlein GmbH & Co. Thermedics Detection Inc. Thermo Environmental Instruments Inc. ThermoQuest Corp. Tremetrics Inc. Unicam Analytical Systems Div. of Analytical Technology Inc. Varian Analytical Instruments Vici AG (Valco Europe) VICI Valco Instruments Co. Inc. VWR Scientific Products World Precision Instruments Inc. Zellweger Analytics Inc. MDA Scientific