PITTSBURGH EXPOSITION spectrograph and various new accesso ries. PHOTOVOLT CORP. 1115 Broadway New York Ν. Υ. 10010
Exhibiting: Poly-Recorder electro chemical laboratory; automatic high precision pulse buret; automatic and recording pH equipment; pH meters and complete line of electrodes ; record ing densitometers for electrophoresis and thin layer chromatography.
If your laboratory oven doesn't have Solid State Temperature Control PICKER NUCLEAR 1275 Mamaroneck Ave. White Plains, Ν. Υ. 10605
of ± 0 . 1 ° , you're getting short-changed! With Hotpack's exclusive ACCUMAT® solid state temperature control system you're not only assured pinpoint control of ± 0 . 1 ° , but max imum safety and reliability, too! For ultra-reliability, in the event of accidental adjustment or malfunction, your workload, equipment and personnel are protected by the automatic LIMITSTAT®! The facility is automatically shut-off! Most of Hotpack's oven, incubator and sterilizer series have this control system built-in, at no extra cost . . . don't get short-changed . . . specify Hotpack! Write today for our 48-page oven catalog.
Exhibiting: X-ray fluorescence and diffraction equipment; mass spectrom eters and gas chromatograph-mass spectrometer system; and data acquisi tion systems for mass spectrometers. PITCHFORD SCIENTIFIC INSTRUMENTS CORP. 1901 Painters Run Rd. Pittsburgh, Pa. 15228
HOTPACK CORPORATION Hotpack
5 0 0 4 C o t t m a n Ave. Phila., Pa. 1 9 1 3 5 IN CANADA: HOTPACK (CANADA) LTD. WATERLOO, ONT. Circle Να. 39 on Readers' Service Card
Exhibiting: Electric arc button fur naces, pulverizers, x-ray spectrographs, differential thermal analyzers, etc.
The Finest Oils, Greases, Waxes... for High Vacuum Work-also Lubricant for High Vacuum Equipment, Masking of Circuit Boards and Other Scientific Applications
Vacuum pressures of these excellent oils are as low as 1 0 7 torr. Greases as low as 1 0 ' 1 1 torr at room tem perature. Scientists, who try Apiezon oils, prefer them for equipment used in nuclear physics, cyclotrons, elec trical equipment, vacuum tubes, etc.; the greases for general laboratory work and gas-liquid chromatogra phy; wax W with suitable solvent as a masking media.
For applications, working characteristics, and list prices, write for new Bulletin 43-AC.
J A M E S G. B I D D L E C O . Electrical and Speed Measuring Instruments PLYMOUTH MEETING, PENNSYLVANIA 19462 Phi>n» .'l.H/hU 37Π0
See ACS Laboratory Guide for All Products/Sales Office Circle No. 11 on Readers' Service Card
88 A
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ANALYTICAL CHEMISTRY
Exhibiting: Books and journals in an alytical chemistry and related subjects including such important works as "UV Atlas of Organic Compounds" in 5 vol umes and a system for spectral docu mentation, identification, and indexing based on a collection of carefully pre pared and selected spectra of some 1000 reference compounds containing the most important organic chromophores. POLYSCIENCE CORP. 9 0 9 Pitner Ave. Evans ton, III. 6 0 2 0 2
As exclusive distributor in the United States, we offer immediate shipment from stock on the complete range of Apiezon products.
BIDDLE
PLENUM PUBLISHING CORP. 2 2 7 West 17th St. New York, Ν. Υ. 10011
614
Exhibiting: Complete line of Haake constant temperature circulators and viscometers; analytical standards kits including kits on alcohols, amines, ke tones, hydrocarbons, pesticides, phe nols, mercaptans, and methyl esters of fatty acids. PREISER SCIENTIFIC, INC. 9 0 0 MacCorkel Ave., S.W. Charleston, W . Va. 25322
Exhibiting: Shimadzu Model 2V-50 UV-visible spectrophotometer with digital reader and accessories, Infoironies digital integrator; Matronics
