NEW BOOKS
HAMNER GM COUNTING SYSTEM 3 Quality Research Instruments in ONE Chassis
' ÎINES A SCALER. RATEMETER AND HIGH-VOLTAGE POWER SUPPLY.
Here in one instrument is a Scaler, Ratemeter and High-Voltage Power Supply, each equal to the finest single GM counting instruments. Solid state tech niques assure reliability, save space and keep the cost to little more than a single scaler or ratemeter. Size is 3V2" χ 19" χ 13V2", weight 20 pounds, power 20 watts.
SCALER Sensitivity: —0.25V to —5V, adjustable. Display: Five 1 inch glow transfer tubes.
RATEMETER Time Constants: A choice of four — 0.5, 2, 10 and 40 seconds. Accuracy: ± 2 % Count Range Indication: By front panel meter with 0-1 ma recorder connection on the rear. An audible "Howler" is also included with an on-off-volume control on the chassis rear. Count Ranges: 6 count ranges to 100,000 cpm. POWER SUPPLY Voltage Range: 350V to 2500V, positive. Output Current: 0 to 0.5 ma. Line Regulation: 0.05% volt, 105-125 volts. Indication: A switch position is provided on the ratemeter range control so that the same meter serves to indicate both count-rate and high voltage.
For Detailed Specifications and Price, Write:
H a m n e r Electronics C o m p a n y , Inc. P.O. Box 531, Princeton, New Jersey Circle No. 52 on Readers' Service Card
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TECHNICON
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ANALYTICAL CHEMISTRY
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drometallurgy and related fields, and miscellaneous applications. Ion-ex change engineering is then covered, and the book closes with a discussion of the future of ion exchange.
Handbook of Automation Computa tion and Control. Vol. 2 . Com puters and Data Processing. E u gene M. Grabbe, Simon Ramo, and Dean E. Wooldridge. About 1100 pages. John Wiley & Sons, Inc., 440 Fourth Ave, New York lfi, Ν. Υ. 1959. S17.50. This is one of three volumes on auto mation computation and control. Vol ume 1 covers control fundamentals, while volume 3 deals with systems and components. The handbook is directed toward engineers, scientists, managers, and others concerned with applying technology to developments in auto matic equipment and systems. Its pur pose is to gather together the available theory and information on general mathematics, feedback control, com puters, data processing, and systems design. Emphasis is on practical methods of applying theory, new tech niques and components, and the role of the electronic computer. Each chapter starts with definitions and descriptions to provide perspective, and then moves on to more complicated theory, anal ysis, and applications. In general, the handbook assumes some engineering training and will serve as an informa tion source and refresher for practicing engineers.
Modern Methods of Analysis of Copper and Its Alloys. Charles M. Dozinel. Translated by George R. Andrasco. 239 pages. Ets. Georges Thone, 15, Rue de la Commune, Liege, Belgium. 1960. 832. The effort has been made in this book to reflect as faithfully as possible the present status of techniques in the chemical control of copper and its alloys. Detailed descriptions of 33 pro cedures which have established them selves in the industry are given. De termination of the main elements is shown systematically with regard to classical wet methods as well as methods such as potentiometry, polarography, colorimetry, and others. The proce dures discussed provide qualitative and quantitative analyses for elements in major as well as trace amounts. A limit of detection as low as 1 p.p.m. or 0.0001 Çr is possible. An extensive bibliography of the world literature includes more than 750 references.
