industrial & engineering chemistry - ACS Publications

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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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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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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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