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T h r e e important books from McGraw-Hill HANDBOOK OF X-RAYS. Edited by ΕΜΜΕTT F. KAELBLE.
This complete handbook pro vides a multitude of previously scattered data on x-ray diffrac tion, emission, absorption, and microscopy. It contains much basic information to guide the scientist who is new to the x-ray field. At the same time, it offers hard-to-find data that will be wel comed by the x-ray specialist. The emphasis of the book is squarely on practical, working in formation and data, while theory is held to the minimum necessary to explain basic practices. A broad area of x-ray science is covered — yet the treatment is de tailed enough to be of value to specialists in the field. Material has been contributed by outstand ing authorities from industry, the universities and government. 1028 pp., $35.00 INORGANIC SYNTHESIS, Vol. XI. By WILLIAM JOLLY.
INTRODUCTION TO ELECTRON-MICRO SCOPY, Second Edition. By CECIL E. HALL.
This new edition of the only au thoritative reference on electron microscopy has been substanti ally updated and expanded to cover the latest developments in this field. The book opens with a concise history of the field and the essentials of physical theory. 397 pp., $17.50
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ANALYTICAL CHEMISTRY
Thermal Conductivity Instrument
Temperature Programmer 1 ^
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modular gas chromatographs, is de signed about a central principle of truly modular construction. All models in the series contain the capability of conversion to other models. Unique new features which provide greater operational flexibility include the use from 1 to 4 simul taneous dual injectors, 1 to 4 simul taneous dual columns, a completely linear system of temperature pro gramming, isothermal program con trollers, and an extremely sensitive stable thermal conductivity detector. The Bendix Corp., Process Instru ments Division, Ronceverte, W. Va. 24970 416
Model TC-500 is for the determina tion of thermal conductivity of plastics, rubber, metals, intermetallics, and ce ramics. Accuracy is ± 3 % from 75° to 500° F. The TC-500 is a compara tive instrument in which a 2%-inch square sample is sandwiched between two geometrically identical 2V2-mch square standards of known thermal conductivity. A thermal flux is im posed on the stack and the temperature gradient ratio is used to obtain the rela tive thermal conductivity of the un known. Sample thickness is usually % inch. Thermo-Physics Corp., 17 Webster Ave., Cambridge, Mass. 02141 417
This latest addition to McGrawHill's Inorganic Synthesis series contains nearly fifty syntheses prepared by a truly international group of contributors and chosen for their utility and overall excel lence. 256 pp., $10.50
At your bookstore or direct from publisher for
Chroma-Lab Series 2 1 0 0 , a series of
Model No. 3600 is designed to con trol the furnace in the Cahn vacuum electrobalance system. It can be used on thermogravimetric analysis, adsorp tion studies, surface chemistry studies, and on laboratory furnaces up to a minimum of 400 W. There are six standard heating rates, approximately 2°, 4°, 6°, 8°, 10°, and 14° C per min ute. The instrument is an open loop device, unaffected by incidental ther mal changes in or near the sample. The program can be set for any rate and for any maximum temperature. It can also be set either to switch off or to hold at the maximum, and thus may be used for isothermal operation. Cahn Instrument Co., 7500 Jefferson St., Paramount, Calif. 90723 418
maybe your monkey is sick! Check his temperature with a YSI Tele-Thermometer and thermistor probe. In just a few seconds you'll know if he has a fever. Or perhaps you're inter ested in heart chamber, intra muscular, and major vessel measurements. Maybe you are conducting thermal dilution studies, or want to implant a temperature sensing device in biological tissue. When you need to measure temperature — lab animals to frozen food packages, beneath the soil, under the sea, or in the air — there is a YSI probe and Tele-Thermometer to do the job. Or if you want to con trol t e m p e r a t u r e , we have equipment for that, too. Take care of your monkey, and write for our catalog of thermistor based temperature m e a s u r e m e n t and control equipment. YELLOW SPRINGS INSTRUMENT CO. YELLOW SPRINGS, O H I O 4 5 3 8 7 Circle No. 211 on Readers' Service Card
