NEWS
NEW PRECISION ROTAMETER FLOW KITS
tive talks, were prepared by the au thors for publication. Opening remarks by the symposium chairman compare tritium analysis with carbon-14 analysis. This is then fol lowed by papers dealing with gas ex posure and other methods of labeling; liquid scintillation and gas counting; health physics considerations; uses in pharmaceutical research, reservoir en gineering and biochemical studies; and autoradiography with tritium. Qual
M i x Atlas—Spectrum
metering tubes interchangeable to ± 2 % in any given size Brooks' new Sho-Rate* Rota meter Kits feature "slip-out" metering tubes that you can change in minutes, without spe cial tools or knuckle-cracking effort. Guaranteed interchangeability—to ± 2 % in any given size—preserves the validity of previously derived data . . . assures future reproducibility. Kits available for a wide range of flow ranges from 0.7 cc/min to 2230 cc/min (water) or 55 cc/min to 148.0 CFH (air). In dividual calibration curve fur nished with each tube and float combination.
Charts.
18 pages. Spex Industries, Inc., 20502 Jamaica Ave., Hollis 23, Ν. Υ. 1958. $24.75. The main part of this book has spec trograms of a Qual Mix blend having 43 elements and used in qualitative spectrographic analysis in the region, 2000 to 4600 A. Persistent lines of each element are identified, and the Qual Mix spectrum is given in juxtapo sition with those of an iron arc and an iron spark. An approximate composition of the Qual Mix blend is given and two sec tions are devoted to spectrochemical analysis for trace elements in unknown samples. One deals with cases where the amount of sample is unlimited, and the other discusses treatment of limited samples. In addition to the spectro graphic charts, tables show the persist ent lines of the 43 elements according to wave length. The Scientific
Instrument
Industry.
James R. Irving. 60 pages. Bell man Publishing Company, P.O. Box 172, Cambridge 38, Mass. 1958. $1.00. A detailed study is made of scientific investigations by the leading scientists of long ago and their importance in evolving rules for measurement is stressed. Also an outline of studies in astronomy and its mathematical deduc tions are given. With the new discov eries of the Twentieth Century, new laws changed the study of measure ments and then in World War I, when imports were cut off, our production of instruments commenced. The six areas in which they are of importance are listed and the early years of their pro ducers are discussed and combinations recorded. With annual sales of $1,165,000,000 and good future prospects, they are now a key industry. A chapter is devoted to uses of in struments such as production of medi cines, chemicals, light and power, iron and steel, food processing and refrigera tion. It is explained that automation is not new, but prediction is that future prospects are better than the current -demand.
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Rigid side-plate construc tion made for operation at pressures up to 200 psi and temperatures to 250°F. » Precision-bore metering tubes have integral rib guides to center float ac curately. • Base is self-leveling, has built-in spirit level. • S i n g l e - and f o u r - t u b e models available.
Send f o r Specification Sheet 5 5 - 7 4 0 - 1 •Trade name of Brooks Rotameter Co.
BROOKS
ROTAMETER CO.
6 5 9 Β Street Specialists in Complete Rotameter
Lansdale, Pa. Instrumentation
S.A. 1987 Circle No. 34 on Readers' Service Card
AMINO ACID ANALYZER Model Κ 5000 FOR SEPARATION, IDENTIFICATION, AND QUANTITATIVE ANALYSIS OF AMINO COMPOUNDS For complete details write Dept. Κ for Bulletin Κ 5000
Ρ ΡI PHOENIX PRECISION INSTRUMENT
COMPANY
3 8 0 3 - 0 5 NORTH FIFTH ST., PHILADELPHIA 4 0 , PENNSYLVANIA Circle No. 158 on Readers' Service Card VOL.
3 1 , N O . 6 , JUNE 1 9 5 9
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