NEW BOOKS
standards laboratories in radioactivity, as well as to those who are establishing radiation physics departments in hos pitals or medical institutions, or em barking upon careers as hospital physi cists. This manual was prepared by the Subcommittee on Standards and Meas urements of Radioactivity for Radio logical Use, National Committee on Radiation Protection and Measure ments, to meet the current needs in the field of radiological measurements.
M' m a The
Bibliography and Index on Vacuum and Low Pressure Measurement.
W. G. Brombacher, NBS Monograph 35, 102 pages. Nov. 1961. 60 cents. This bibliography contains 1538 ref erences, of which 52 are to books. About 550 of the periodical references are specifically on pressure measure ment, including both vacuum gages and micromanometers. The balance is on vacuum technology, including adsorp tion, degassing, vacuum pumps, con trolled gas leaks, valves, seals and vac
& * % ,
a&/
uum systems, which all bear on the technique of vacuum measurement. The references are divided into a list of books and a list of papers and re ports, listed chronologically by years, covering the period up to January 1, 1961. With minor exceptions, neither catalogs nor announcements in trade journals of new instruments without technical data, nor patents, are listed. Vacuum technology has been advanc ing at a rapidly accelerating rate dur ing the past few years in response to the needs of science and industry. Therefore, a reasonable effort was made to list all significant references on vacuum and low pressure instrumenta tion, particularly those published since 1949. Extensive, but not necessarily complete references to vacuum tech nology and phenomena were included, since making valid vacuum measure ments involves the effect of such phe nomena as adsorption, degassing, etc.
OHAUS
TRIPLE BEAM BALANCE This scale conies in a wide selection of models. Models available with undivided tare beam. Choice of stainless steel plate, remov able pan, scoop or animal subject box.
Research Highlights of the National Bureau of Standards, Annual Re port for Fiscal 1 9 6 1 . NBS Miscel laneous Publication 2JI2) 204 pages. Dec. 1961. 75 cents.
SELECTION OF METRIC, or AVOIRDUPOIS
Research Highlights reviews the NBS's research activities in developing, maintaining, and extending the nation's standards of physical measurement, and in investigating the physical constants and the basic properties of materials. It is directed to research and industrial management, as well as to engineers and scientists. Among the topics covered are: the NBS program in plasma physics and laboratory astrophysics, design of a new research reactor to advance the measurement and understanding of the effects of radiation on substances of all kinds, and to provide a powerful tool for analysis of atomic and molecular structure, reliable temperature meas urements at 16,000° K., and research toward thermometer calibration service from 1.5° to 20° K. Other research areas described in clude low ion-content water, half-life of carbon-14, a new standard frequency broadcast station, redetermination of the NBS unit of electrical resistance, a data center on atomic collision cross sections, the production of radio waves from plasmas in the laboratory, new radioactive standard materials, effects of radiation on simple molecules, wire for super-conducting magnets, and many others. In all, approximately 200 programs in 21 fields of the physi cal sciences are described.
CONVENIEN1 UNDIVIDED TARE BEAM
f MODEL 7 6 0 METRIC (Illustrated) TARE CAP. 180 GRAMS FRONT BEAM 10 χ 1 / 1 0
64
GRAM
CAPACITY W / O
BACK
BEAM
100
χ
10
GRAM
610 CAPACITY
W/ATT.
SENSITIVITY 0.1 G R A M
OHAUS SCALE 1050
COMMERCE
•
GRAM
CORPORATION
AVENUE U N I O N , Dept. A C
ANALYTICAL CHEMISTRY
GRAM
WTS. 2610
Circle No. 146 on Readers' Service Card 88 A
ATT. WTS.
CENTER BEAM 5 0 0 χ 1 0 0 G R A M
NEW
JERSEY
