S P E X presents
the MANUFACTURERS'
C^&do&nf
LITERATURE
*W G -v* u e
Environmental Test C h a m b e r s . Fourpage brochure and four specification sheets describe line of high-low, alti tude, ami humidity t e m p e r a t u r e d test chambers. Conrad, Inc. 20
ehd
i^l^në-grinding drudgery /
ttmz.a&L&
SPECTROSCOPY Infrared
grinding KBr pellets a n d Nujol mulls
Emission
mixing powders without contamination in 1 0 seconds
X-Ray
diluting to achieve optimum intensities
ELECTRON M I C R O S C O P Y . . grinding to less than 1 micron in 1 0 minutes ANALYTICAL CHEMISTRY . . grinding samples to homogeneous powders
S Ρ EX Industries,
Inc. SO-56 230 Street, Queens Village27,
For further information, circle number 62 A-1 on Readers' Service Card, page 51 A
N.Y.
Spectrometer A c c e s s o r i e s . Four-page brochure describes broad range of sam pling accessories for line of infrared spec trometers. Pei'kin-Elmer Corp., Norwalk, Conn. 21 Scintillation Counters. Bulletin of four pages describes line of scintillation counters. N . Wood Counter Labora tory. 22 Homogenizer. Four-page bulletin covers laboratory homogenizer opera tion, specifications, and design. M a n ton-Gaulin Mfg. Co. {LH-65). 23 Air Conditioners. Eight-page bulletin describes design, applications, a n d speci fications of company's line of air con ditioning units. Frick Co. (Bull. 522E). 24 Recording Titrometer. Eight-page bulletin describes applications, features, operation, a n d construction of automatic feed recording titrometer. Precision Scientific Co. (B1M.64OB). 25 Fatty A c i d s . Booklet of 48 pages on t h e chemistry of fatty acids reviews composition of fats and oils, sources and chemical m a k e u p of fatty acids. Ar mour & Co. 26
How to select filter paper for commercial filtration ! This recently published brochure enumerates dozens of commercial pro ducts and processes and tells you the specific grades of E&D filter paper that are most widely used. In most cases, there is a choice of 2 or more grades. This valuable information is free for the asking. W r i t e us for your copy. If your product or process is not in cluded, we will be happy to recom mend the best grade for you to try. Free samples for test runs will be made available to you. You can rely on the experience of the only company in America exclusively engaged in the manufacture of filter papers for science and industry.
THE EATON-DIKEMAN CO. FILTERTOWN NIT. H O L L Y S P R I N G S ,
PENNA.
For further information, circle number 62 A-2 on Readers' Service Card, page 51 A
62 A
Emulsifier. D a t a sheet gives specifica tions, properties, and packaging infor mation on a general purpose, nonionic emulsifier which has a high degree of surface activity and disperses readily in water a n d m a n y organic solvents. Witco Chemical Co. (Witco 31). 27 Chart D r i v e s . Sixteen-page catalog presents line of chart drives, discussing types and construction features. Esterline-Angus Co., I n c . (Cat. Section 20-56). 28 Chromatography, Electrophoresis Equipment. Catalog of 36 pages on a p p a r a t u s and accessories for chromatog raphy and electrophoresis. Scientific Glass A p p a r a t u s Co.. I n c . (Cat. C-465). 29 Carbon D i o x i d e . Technical paper de scribes new m e t h o d for determining car bon dioxide in water b y conductivity measurements. W. H . & L . D . Betz. (Tech. Paper 1S8). 30 For further information, see coupon on page 51 A ANALYTICAL
CHEMISTRY
