NEW BOOKS Séminaire Sur La Protection Contre les Dangers du Tritium, vi + 136
pages. Service Central de Protection contre les Rayonnements Ionisants. Boîte Postale n° 35. Le Vesinet (S et 0), France. No charge. 1964The proceedings of the Seminar on Protection against Danger from Tritium are presented in this volume. The physical and chemical properties of tritium, biological effects, sources of tritium contamination in the atmosphere, monitoring instrumentation, and techniques of decontamination are among the subjects discussed. Manual on Recommended Practices in Spectrophotometry, vii + 120
Nuclear Magnetic Resonance and Electron Spin Resonance Spectra. Index for 1 9 5 8 - 1 9 6 3 . Herbert M. Hershenson. xxii + 95 pages. Aca demic Press, Inc., Ill Fifth Ave., New York, Ν. Υ. 10003. 1965. $10.50.
Absorption Spectra of Minor Bases. Their Nucleosides, Nucleotides, and Selected Oligoribonucleotides.
Tat'yana Vladimirovna Venkstern and Aleksandr Aleksandrovich Baev. vi + 86 pages. Plenum Press Data Division, 227 West 17th St., New York, N.Y. 10011. $10.50.
This volume consists of more than 8000 references to NMR and ESR spec tra published in sixty-seven worldwide journals and in two collections of spec tra during 1958-1963.
The ultraviolet spectra of adenine, guanine, uridine, and cytidine bases and related compounds in O.hV HC1, OAN KOH, and after bromination are pre sented. Positions of maxima, minima, molar extinction coefficients, and ab sorption ratios at different ratios are presented in tabular form.
Proceedings of the Third Interna tional Congress of Polarography, Southampton 1964. Macmillan & Co., Ltd., Little Essex St., London W. C. 2. 15 gns.
pages. American Society for Testing and Materials, 1916 Race St., Philadelphia, Pa. 1910.3. 1966. $3.00; to AST M members, $245.
The above publication is currently available from the publisher.
This manual is a compilation of all the practices proposed by the ASTM Committee on absorption spectrometry. Infrared and ultraviolet methods as λνβΐΐ as general qualitative analysis methods are included. Definitions of terms and symbols relating to molecular spectrometry, measurement of instru ment performance, and actual tech niques are included.
pages. American Society for Testing and Materials, 1916 Race St., Phila delphia, Pa. 19103. 1966. $4.75; to ASTM members, $3.30. Differential thermal analysis and electron-probe microanalysis as applied to the analysis of microconstituents of steel are presented. Isolation and sepa ration techniques are also included.
U. S. G o v e r n m e n t Publications
Determination of Nonmetallic Com pounds in Steel—STP 3 9 3 . 102
FLAMELESS BLOW TORCH
Selected Methods for the Measure ment of Air Pollutants, vii + 4'>
pages. Department of Health, Edu cation, and Welfare, Public Health Service, Robert A. Taft Sanitary En gineering Center, ^676 Columbia Parkway, Cincinnati, Ohio 45226. Free of charge. Methods for the determination of sul fur dioxide, nitrogen dioxide and nitric
Viscosity directly in centipoises
. . .
HOEPPLER VISCOMETER PRECISION
FOR FAST HEAT up to 1 , 0 0 0 F. For applications requiring q u i c k concen t r a t e d h e a t blast up t o 1000° F., w i t h o u t f l a m e . S o f t e n , f o r m , mold and patch plas tics, etc. T e m p e r a t u r e varied by air i n t a k e a d j u s t m e n t . 110-230 V . A C - D C m o t o r 3 wire plug. A l l 110 V . models equipped w i t h adapter for 2-prong receptacle. 8 f t . heavy d u t y cord. I n t e r m i t t e n t d u t y . O t h e r models available w i t h lower t e m p , ranges. M o s t of t h e big names in i n d u s t r y use M A S T E R H E A T G U N S in laboratories or i n produc tion. Model H G 501-500° F. 115V—$45.35 (Others $40.25 t o $67.85)
AIR HEATER BLOWER For q u i c k electrically heated air up t o 750° F. For accelerating drying processes or for localized h e a t i n g . B . T . U . 3400. Air velocity 2000 F P M 110-230 V . A C only. 3 wire plug. All 110 V . models equipped w i t h adapter for 2 prong receptacle. 8 f t . heavy d u t y cord. Continuous d u t y , 2" d i a . χ 3" long discharge nozzle. Model AH-501-500° F. 115V-$59.95 {Others f r o m $56.65 t o $90.25)
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94 A
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ANALYTICAL
CHEMISTRY
MODEL
Hoeppler Viscometer provides a fast, accurate method of determining viscosity of gases, liq uids, oils, plastics, syrups, viscous tars and dark liquids. From 0°C. to 100°C. Direct readings in centipoises (or centistokes). From 0.01 to 1,000,000 centipoises. Accuracy 0 . 1 % to 0.5%. Small sample (30cc) required. Results consistent and reproducible. Price $350. Interchangeable spare parts available. Write for Bulletin
HV-303.
MADE I N U . S . A .
UBBELOHDE VISCOMETER on the principle of the suspended hvei A capillary-type viscometer for determining the kinematic vis cosity of any true viscous liquid, such as petroleum products or lubricants. See American Society for Testing Materials, A.S.T.M. designation D 445-64. Measures viscosity with an error not greater than =
