NEW BOOKS ASTM symposium on radioactivity in industrial water and industrial waste water. The papers relate to problems in the reactor plant and associated waste water.
ASTM symposium. The 7 papers presented cover x-ray diffraction and semiquantitative spectrograph^ methods, and other improved analytical techniques for determining the nature of deposits, elemental analysis, phase identification, corrosion films on steel, and correlation of elemental analyses with phase identification.
Symposium on Identification of W a t e r - F o r m e d Deposits. S T P 256. 80 pages. $2.75.
Some of the newer analytical techniques available to the water-treatment engineer in the identification of waterformed deposits were described at an
Symposium on Radioisotopes in Metals Analysis a n d Testing. S T P
261. 64 pages, $2.75.
Papers describing instruments and techniques available to the analyst were presented at an ASTM symposium on radioisotopes in metals analysis. The papers (9) presented appear in this book. Topics include nucleonics in analysis ; nucleonic instrumentation ; radioactivation, isotopes dilution and neutron activation analyses; and training of industrial personnel.
S y m p o s i u m o n Electron M e t a l l o g r a p h y . S T P 262. 134 pages. $4.25.
lTse of the electron microscope in electron metallography was discussed at an ASTM symposium. Eleven papers presented have been incorporated in the publication.
ACCURATE LIQUID DISCHARGE TO .01 ul
Government Publications Special Sources of Information on Isotopes (TID-4563). Anonymous, vi + 54 pages. Office of Isotopes Development, U.S. Atomic Energy Commission, Washington 25, D. C. No charge.
Announcing—The #7001 Hamilton Microliter Syringe! Here is a revolutionary new syringe with a 1 ul capacity and a scale subdivided into 100 parts. It has an accuracy of zt.03% . . . permitting accurate discharge of liquids to 1/100 ul. The bore of the needle serves as the syringe barrel. The plunger is 0.006" tungsten wire which bottoms at the point of the 7 cm needle. As a result, there is only microscopic loss of liquid, and no hold-up or dead volume. The #7001 is the ideal syringe for discharging the minute liquid volumes required for extreme accuracy in chromatography and similar research and analysis. #7001-N
A N e w Instrument for t h e Determination of Molecular W e i g h t b y D i f f e r e n t i a l V a p o r Pressure. N.
Order direct... also available through your supply house. Write today for catalog of Hamilton
M. Wiederhorn, J. H. Vreeland, and It. R. Perron, Arthur D. Little, Inc. for Wright Air Development Center, U. S. Air Force. March 1959. 37 pages. PB 151832. $1.
syringes
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The following publications are available from the Office of Technical Services, U. S. Department of Commerce. Washington 25, D. 0 .
1 ul (1/1000 ml) Microliter Syringe with 7 cm
length needle, Patent Pending-$35.00 #7001-NCH (Above syringe, with Chaney Adaption)-$41.00
PRECISION
This publication lists more than 300 informational references and their availability. Reference listings are broken down into 14 major areas of interest: general publications, basic texts, procurement of radioisotopes, properties, isotope uses, irradiation services, laboratories and equipment, radiation safety, waste disposal, legislation, educational material, development and assistance programs, lists of users, and stable isotopes. Also included are a number of titles and the availability of translations of important foreign publications.
ANALYTICAL CHEMISTRY
CH E M I C A L
RESEARCH.
A differential vapor pressure molecular weight instrument was developed for determination of molecular weights of sparingly soluble compounds in the
