disciplines. Manufactures and sells its own laboratory testing instruments and appara tus, and will custom-build instruments to a customer's order or design.
Victoreen Instrument Co. 5806 Hough A v e . Cleveland 3 , Ohio
Manufactures nuclear instruments includ ing those for pulse height analysis and general counting, survey instruments, dosimeters, and environmental radioactivity monitors. Also manufactures a gamma irradiation cell for polymerization, sterilization, and other opera tions.
Unitron Instrument Div. of United Scientific Company 2 0 4 - 2 0 6 Milk St. Boston 9, Mass.
Manufacturers of precision optical instru ments including polarizing, laboratory, phase, metallurgical, toolmakers, measuring and camera microscopes, counting acces sories, etc.
equipment. Volk regularly supplies over 400 radioactive compounds: carhon-14, sulfur35, phosphorus-32, and tritium-labeled. Also available are some 150 stable isotope—labeled compounds of deuterium, nitrogen-15, and oxygen-18. Unlisted compounds of these and other isotopes are prepared to special order. Varying research requirements are met by providing products in special packag ing, special sizes, and at special specific ac tivity.
Victory Engineering Corp. 68 Springfield Rd. Union, N. J.
Manufactures thermistors, Varistors, ther mal conductivity cells, electronic controls, thermal, electronic, and physical-sensing de vices.
Valentine Technical Instrument Co. Richmondville, Ν. Υ.
Manufactures and distributes Valentine Refractometers. First maker of refractometers in U. a.—1919.
Voland & Sons, Inc. 32 Relyea PI. Varian Associates Instrument Div. 611 Hansen Way Palo Alto, Calif.
New Rochelle, N . Y.
Manufactures a standard line of analyt ical balances and weights. Specialist in large capacity, high sensitivity analytical balances, is glad to quote on special in struments for unusual weighing problems.
The Instrument Division manufactures N.MR and E P R spectrometers, laboratory electromagnets, potentiometer-type graphic recorders, and nuclear free-precession magne tometers. An N M R / E P R Applications Laboratory is available to perform sample analyses as a research service. Other divisions of Varian Associates produce microwave tubes, vacuum pumps, and linear accelerators.
Wabash Metal Products Co. Box 305 1569 Morris St. Wabash, Ind.
Laboratory Presses. A four-page bulletin describes the line of manually operated and powered hydraulic laboratory presses from 3- to 50-ton capacity. Heated platens, sen sitive pressure and temperature gages, ap plications, typical users, and construction features are described.
Waring Products Corp. 25 West 43rd St. Volk Radiochemical Co.
New York 3 6 , Ν . Υ.
5412 No. Clark St.
Manufacturers of the Waring Blendor which mascerates, emulsifies, pulps, pulver izes, homogenizes, and blends. Available with 27-ounce or one-gallon capacity. Devel oper and manufacturer of the explosion proof Blendor motor.
Chicago 4 0 , III.
Manufactures and distributes isotopically labeled compounds and isotope laboratory
Weighing & Control Components, Inc. Hatboro, Pa.
Manufactures and distributes weighing equipment and instrumentation including unitized automatic weighing systems; also dewpoint indicators and recorders.
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the b i g M a r c h
Manufacturer of scientific instruments, laboratory balances, meters, resistance boxes, cathetometers, sparkless motor stirrers, equipment for physical chemistry. Duoseal high vacuum pumps, Wegner pumps for distillation, and the Densichron, a new densitometer for many laboratory purposes, especially adapted for paper chromatography. Write for booklets or catalog of Welch specialties.
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Welwyn International, Inc. 3355 Edgecliff Terrace Cleveland 1 1 , Ohio
U. S. representative of Radiometer of Denmark. Offers and services complete line of Danish electrochemical instruments, featuring the pH meter, Model 22 and Model TTTI.
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Wesco Electric Company 411 Glenwood A v e . Grand Junction, Colo.
Lowe's shaker plates. Shaking hot plates for rapid, uniform, acid solution reduction without bumping or splattering.
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