MANUFACTURERS' LITERATURE
DRIERITE ®
"THE VERSATILE DESICCANT"
For Drying SOLIDS-LIQUIDS-GASES
A low cost, all-purpose drying agent, D R I E R I T E is neutral in reaction, chemically stable, constant in vol ume, inert except toward water, in soluble in organic liquids and re frigerants, non-disintegrating, nonwetting, non-poisonous, non-cor rosive, repeatedly regenerative, and non-channeling.
INDICATING
DRIERITE
While possessing all of the properties of regular D R I E R I T E , I N D I C A T ING D R I E R I T E makes a clearly visible change from blue when dry to pink when exhausted. Order directly from your Labora tory Supply Dealer. Write to us for our new 100-page book
W. A. HAMMOND DRIERITE COMPANY 120 Dayton Avenue, Xenia, Ohio Circle No. 75 · • Readers' Service Card
1 7 0 A · ANALYTICAL CHEMISTRY
CURTIN...
DC Amplifier. Applications, circuit description, and specifications for the Model 121A/A wideband, solid-state DC amplifier are included in a 4-page color data sheet. Data Sheet 2-127. Cohu Electronics, Inc., Box 623, San Diego 12, Calif. 615 Computing Recorder. An instrument which performs a \vide variety of ana log computing functions while record ing process variables and/or computed values is described in a product sheet. The 4 basic units that are used and the method of combining them to divide, extract square roots, multiply, and com pute compensated gas flow are described and diagrammed. Bulletin No. PBCR-1. Consolidated Electrodynamics Corp., 360 Sierra Madre Villa, Pasa dena, Calif. 616 Ratographic Miniature Electronic In struments. An 8-page catalog pre sents details on a 6" X 6" strip chart recorder, a 3 " X 6" indicating control station, and a 2-wire transmitter that comprise the system. Catalog 50E2000. Fischer & Porter Co., 236 Jack sonville Rd., Warminster, Pa. 617
REGULAR DRIERITE
from
MICROTEK Accessories For Gas Chromatography
Spectrophotometer. Illustrative spec tra and performance specifications are given for an instrument that covers the electromagnetic spectrum from 175 millimicrons in the far UV to 2.7 mi crons in the near infrared. Instrument features a double monochromator for minimum stray light, integral ordinate scale expansion for the magnification of weak bands, and zero absorption line compensation for stability and photo metric accuracy. Model 350. PerkinElmer Corp., Norwalk, Conn. 618
... and Curtin Service, too!
Strip-Chart Recorders. Detailed in formation on carbon-paper strip-chart recorders including features, general descriptions, system of chart-speed changing, paper transporting methods, photographs, dimensions, and weights is available. Bulletin T-621. Lists of specifications and prices for available accessories are given in Bulletin T-622. Schwarzer Corp., 46 Salmi Road, Framingham, Mass. 619
The Micro-Tek Snap Sampler offers a simple, safe, accurate, and precise means for sampling volatile, high pressure liquid samples. Micro-Tek Snap Sam plers have been used success fully with sample pressures up to 200 psig. Precision of better than ± 1 % is possible.
Cryogenic Refrigerator. An 8-page brochure, illustrated with charts and diagrams, covers all the features of a cryogenic refrigerator which, using liq uid nitrogen as the refrigerant, brings added speed and efficiency to specimen freezing. Catalog 320. Air Reduction Co., 150 E. 42nd St., New York 17, Ν. Υ. 620
Micro-Tek's new Universal Sam ple Inlet system provides un usual versatility in precision sampling. The pressure-lock ball valve inlet permits use of all the precise Micro-Tek sampling accessories including the new "Snap Sampler" for volatile, high pressure liquid samples. Converts in seconds for conven tional syringe sampling.
Six Curtin supply points as sure immediate delivery on the full Micro-Tek line of accesso ries. For complete information request Micro-Tek Bulletin from W. H. Curtin and Company, Department AC, P. O. Box 118, Houston 1, Texas.
W. H. CURTIN & CO. SCIENTIFIC APPARATUS AND CHEMICALS
CURTIN
Electronic Chemicals. A 12-page il lustrated guide features specifications
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Circle No. 113 on Readers' Service Card
