MANUFACTURERS' LITERATURE matography. The bulletin also dis cusses some of the variables to consider in gas chromatography. Jarrell-Ash Co., 26 Farwell St., Newtonville 60, Mass.
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The Givaudanian. The June issue contains an article on a preparative scale gas chromatograph. The prob lems involved and the compromises made in using larger sample sizes in preparative scale gas chromatography are discussed. Givaudan-Delawanna, Inc., 321 West 44th St., New York 36, Ν. Υ. Gardner Newsletter 7 0 , May-June. This 8-page issue features the Colorgard, Model "C", a photoelectric sys tem for quality control of color. Also included is information on other Colorgard instruments, wet thickness gages, color standards for liquids, and other laboratory devices. Gardner Labora tory, Inc., P. O. Box 5728, Bethesda 14, Md. Norelco Reporter. Vol. X, No. 2. The April-June issue contains several articles on the application of x-ray analysis in the steel industry. Other ar ticles are concerned with x-ray in min eral beneficiation processes, and in studying fluoride in bone and teeth. Philips Electronic Instruments, 750 South Fulton Ave., Mount Vernon, Ν. Υ. RSCo Review. Vol. 5, No. 3. This 4-page issue describes in detail an intro ductory kit for thin layer chromatog raphy. This inexpensive kit permits experimentation with 14 different ad sorbents. Research Specialties Co., 200 South Garrard Blvd., Richmond, Calif.
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For precision, ease of operation and speed As we have served you well in the past — we can now serve you even better through our expanded SCIENTIFIC APPARATUS and SUPPLIES DIVISION Our recent move to larger quarters, combining offices, laboratories and warehouses in one building, enables us to meet your most particular individual requirements in balances from the classic analytical to the ultra micro balance.
Analabs. Vol. 2, No. 2. The summer issue describes two polar stabilized polyesters for gas chromatography. Ethylene glycol malonate and diethyl ene glycol malonate can be used to sep arate fatty acid esters on short, ineffi cient columns. The issue also lists over 200 stationary phases. Analabs, P . O. Box 5215, Hamden 18, Conn. News and Revievr. No. 7. The spring issue, 24 pages, illustrates and describes various laboratory apparatus. Of special interest are the Lloyd gas analyzer with combustion accessory, and "Chromatobags."' The "Chromatobag" consists of a readily demountable plastics-coated framework which sup ports the solvent trough and guide rods for paper strips or sheets. A flexible plastic bag fks over this to pro vide a tank. A. Gallenkamp & Co., Ltd., Technico House, Christopher St., London EC2, England.
Illustrated brochure w i t h complete details a v a i l a b l e upon request.
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Circle No. 85 on Readers' Service Card VOL. 35, NO. 10, SEPTEMBER 1963
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169 A
