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instruments, photoelectric measuring instruments, rectifier instruments, ra diation measuring instruments, and the radiation thickness gauge. Finally, Part IV is concerned with what the author calls "quasi-electronic" instru ments and electronic devices used di rectly. He includes in the quasi-elec tronic group those instruments which contain some of the elements of an elec tronic instrument, but which could also be classed by some other term, such as electromagnetic. The book is illus trated with diagrams, charts, and pho tographs.
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Electroanalytical
Methods.
G. Chariot, Editor, xii + 186 pages. Distributed in the United States and Canada by D. Van Nostrand Co., 257 Fourth Ave., New York 10, Ν. Υ. 1958. $4.95.
This book appeared originally as issue Nos. 1 and 2 of Analytica Chemica Acta, Vol. 18 (1958). It consists of the proceedings of the International Nuclear Measurements Corp. Symposium on Modern Electrochemical 2 4 0 0 N. Arlington Ave. · Telephone: LIBERTY 6-2415 Methods of Analysis, held at Paris in INDIANAPOLIS 18, INDIANA 1957. That meeting was sponsored by IUPAC's Sections of Analytical and International O f f i c e : 13 E. 4 0 t h St., N e w York 16, N.Y. For further information, circle number 54 A-1 on Readers' Service Card, page 97 A Physical Chemistry. Topics discussed include various electrochemical methods in melted salts; chronopotentiometry; a new and better way the use of intensity-potential curves in amperometry and in potentiometry of to stir and heat liquids constant intensity; coulometric deter minations; recent developments in polarography such as radiochemical de terminations; anodic stripping; current scanning; oscillographic microanalysis; square wave polarography; and high frequency titrations. Papers are in English, French, or German, as re ceived from the authors. Each closes with a list of references and minutes of any discussion that took place after its presentation at Paris. The volume includes 124 illustrations and 35 tables. combines a variable magnetic stirrer and a closely controlled hot plate Symposium on Radioisotopes. ASTM so that you now can stir and heat liquids simultaneously Special Technical Publication No. . . . or perform either 215. 94 pages. American Society operation independently. for Testing Materials, 1916 Race St., Ideal for the many stirring, Philadelphia 3, Pa. 1958. $2.20 for dissolving, and mixing operations performed in members; $2.75 for nonmembers. clinical-medical laboratories. Magnetic stirring action The second Pacific Area National lets you stir liquids in closed or vacuum-sealed systems, odd-shaped or narrowMeeting of the American Society for necked vessels, and other non-magnetic flat or curved-bottom containers not usable Testing Materials was held at Los with many ordinary stirring units. Hot plate lets you apply thermostatically con trolled heat over a wide range to make this the ideal combination stirring-heating Angeles in September 1956. Here is unit to bring extra time and money savings to your laboratory. Price complete a collection of papers that were pre with two stirring magnets and 5' cord with plug, $84.50. Write for new, free sented at the meeting's symposium TEMCO-THERMOLYNE catalog information and name of nearest dealer. sponsored by ASTM Committee E-10 on Radioisotopes and Radiation Ef THERMO ELECTRIC MANUFACTURING CO. fects. Nine papers are reproduced, 4 7 8 Huff Street, Dubuque, I o w a plus the discussion which took place
NOW
STIR-PLATE
For further information, circle number 54 A-2 on Readers' Service Card, page 97 A 54 A
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ANALYTICAL CHEMISTRY
