INDEX TO ADVERTISERS, 7 December 1962Academic Press ..

Ace Glass Inc ....

Addison-Wesley Publishing Co., Inc.Ainsworth, Wm., & Sons, Inc.American Cyanamid Co. ..

American Electronic LaboratoriesAmerican Optical Co .American Sterilizer Co.Arapahoe Chemicals, Inc.Astromarine Products Corp .Atomic Laboratories, Inc.Bausch & Lomb Optical Co.

1144, 1145,Beckman Instruments, Inc.Bethlehem Apparatus Co., Inc.Bel-Art ProductsBellco Glass Inc.Blickman, S., Inc. 1149,Branson Instruments, Inc.Brinkmann Instruments, Inc.Buchler Instruments, Inc.Burrell Corp.CBS LaboratoriesCalmag Div., California Magnetic

Control Corp.Cambridge Instrument Co., Inc.Central Scientific Co.Clay-AdamsColeman Instruments, Inc.Connecticut Instrument Co.Consolidated Systems Corp.Custom Scientific Instruments, Inc.Delmar Scientific LaboratoriesDifco LaboratoriesDuPont, E. I., de Nemours & Co.,

Inc. 1043.Ealing Corp.Eberbach Corp.Edmund Scientific Co.Ednalite Research Corp.Electronic Instruments for ResearchElgeet Optical Co.Ercona Corp.Exact Weight Scale Co.Fisher Scientific Co. 1147,Fish-Schurman Corp.Garfield, Oliver, Co., Inc. 1157,Gelman Instrument Co.Glas-Col Apparatus Co.Gregg Laboratory TopsHacker, William J., & Co., Inc.Hamilton Co., Inc.Harrington Enterprises, Inc.Harvard Apparatus Co., Inc.Honeywell, Heiland Div.Hyland LaboratoriesIndustrial InstrumentsInfotronics Corp.Instrument & Development Products

Co. .........................

Instrumentation LaboratoryInternational Business MachinesInternational Equipment Co. 1014,Johns-ManvilleKeystone Plastics Co.Kimble Glass Co. .. 1210, 1212,Kirschner Manufacturing Co.Klett Manufacturing Co., Inc.Kontes Glass Co.Lab-Line Instruments, Inc.LaPine Scientific Co. .......Lea & Febiger .......

Leitz, E., Inc.Linde Co .. .............

LKB Instruments Inc. ....

Lockheed Electronics Co. ......

London Co. .......

7 DECEMBER 1962

11631153106412021175119912161057115211631032

11971028120411581182117312051205116611551169

1188117710481023103611931164119211621159

10441167115910391189114810651042117012071167119210451029117811951049119611771198117611841160

118210381010101510301031121512091177119010461194117910681146118110511050

Manostat Corp. .............Maryland Plastics, Inc...........Matheson Coleman & Bell ....Mechrolab, Inc. ...

Meinecke & Co., Inc. ...

Mettler Instrument Corp.Microchemical Specialties Co.Missimers, Inc. .. ..

Mistaire Laboratories .....

Mosby, C. V., Co .Nalge Co., Inc.National Appliance Co.New Brunswick Scientific Co., Inc.Nikon Inc.NRC Equipment Corp.Nuclear-Chicago Corp.Nuclide Corp.Nutritional Biochemicals Corp.Ohaus Scale Corp.Optics Technology, Inc.Oxford University PressPackard Instrument Co., Inc.Parr Instrument Co.Pennsylvania Fluorocarbon Co.,

Inc.Pennsylvania Scale Co.PercivalPerkin-Elmer Corp.Pharmacia Fine Chemicals, Inc. 1055,Phipps & Bird, Inc.Phoenix Precision Instrument Co.Photovolt Corp.Picker X-Ray Corp.Pioneer PlasticsPolaroid Corp.Porter-Mathews Co. Inc.Professional Tape Co.. Inc.Radiation Instrument Development

Laboratory. Inc.Ralston Purina Co.Sargent, E. H., & Co.Savant Instruments, Inc.Schleicher, Carl, & Schuell Co.Schwarz BioResearch, Inc.Scientific Industries, Inc. 1151,Scientific Products, Div. of Amer-

ican Hospital Supply Corp.Sherer-Gillett Co.Sigma Chemical Co.Sigmamotor Inc.Sorvall, Ivan, Inc.Standard Scientific Supply Corp.Stoelting, C. H.. Co.Stokes, F. J., Corp.Sylvania Electric Products Inc.Technicon Chromatography Co.Texas Instruments Inc.Thermolyne Corp.TIAA .....

Torsion Balance Co. .....

Tracerlab, Inc. ...

Tri-R InstrumentsUnitron Instrument Co.Universitv of Wisconsin PressVanguard Instrument Co.Varian AssociatesVictoreen Instrument Co.VirTis Co.. Inc.Welch Scientific Co.Wild Heerbrugg Instruments, Inc.Wiley, John, & Sons, Inc. 1034.Wilkens-Anderson Co. 1054.Will Scientific. Inc. ..Williams & Wilkins Co.Worthington Biochemical Corp.Yellow Springs Instrument Co., Inc.Zeiss, Carl, Inc.

11941037101211621152101611961154119211851186116810591022104012061152101110251184117210701204

1188116711871047116011821058119110531204102411831150

1062115410601151117212011209

1066120911951182106111711151116411611017104112111165106310271187103311481056102110671020115912031035120611561052120811461026

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SCIENCE, VOL. 138

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