NEW LITERATURE DIGEST Stream gages. Bulletin 18 describes eight accessories for gaging streams. Three instruments are designed for making current measurements: a tag line, a gaging reel, and a sounding reel. A cable hanger connecter is offered for use with the sounding reel. Staff gages for direct visual reading of water levels are porcelain enameled to resist rust and discoloration. Hook and point gages use vernier action to measure liquid surfaces within 0.001 foot. A float gage and an electric contact gage are also offered. Leupold & Stevens Instruments, Inc. 91 Trickling filters. Bulletin N-960 presents a trickling filter for use in secondary treatment plants. Included, also, is a description of a rotary distributor accessory for the device. General American Transportation C o p . 92 Noncontact thermometers. An 8-page illustrated booklet discusses applications of the Opti-therm infrared thermometer. Such uses include measuring thermal characteristics of streams, correlating cloud temperatures with ground temperature and elevation, and noting the relationship between plant and ground temperatures. A 4-page, two-color brochure also available describes a second device: a precision, noncontact radiation thermometer for remote sensing of earth environment. 93 Barnes Engineering Co. Labware. Catalog 101 describes a line of standard porcelain labware and two new lines of high-alumina ware. Coors Porcelain Co. 94 Industrial pollution control systems. Bulletin 67-1 describes liquid and fume destruction systems for control of industrial wastes, The units feature special air-inlet tiles that admit air into the furnace chamber to cool the refractory lining. Heat recovery units are included in several of the systems. Bigelow-Liptak Corp. 95
Gas chromatography journal. The first issue of the new publication, The DeTektor, highlights the electrolytic conductivity detector for gas chromatography, especially for use in the detection of nitrogen, halides, and sulfur. Flame photometry and Coulson units are also featured. Tracor Analytical Instruments, Inc. 96 Surfactants. A 3 1-page technical bulletin discusses properties, applications, physiological considerations, surfaceactive measuring procedures, and analytical methods for the use of an anionic sulfonate surfactant. The surfactant is useful in metal cleaning, phenolic resin solubilizing, and chemical
specialty formulating, textiles, detergent disinfectants, shampoos, cosmetics, and emulsion polymerization. It also has pulp and paper industry applications, food processing applications. Dow Chemical Co. 97 Filter paper. A 24-page brochure lists more than 100 grades of filter papers, extraction thimbles, and related products, in an assortment of sizes and shapes for special uses. Included is a table that suggests special papers for specific applications-phenylketonuria detection, isotope work, Kjeldahl determinations, and brewery operations, for example. Gallard-Schlesinger Chemical Manufacturing Corp. 98
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Volume 2, Number 6 , June 1968 477
