1B
JOURNAL O F CHEMICAL EDUCATION
compressors, feed-water heaters and condensers, the gas-turbine power plant, and mechanical refrigeration. The descriptions are clear and well illustrated. The material is thoroughly modem, the aircraft gas-turbine is described (but not the ramljet), and s description of the heat pump concludes the chapter on refrimrat,ian. ---~This hook is widely used in beginning courses in mechanical engineering heat power. If one desires a description of this type of equipment, this book is excellent.
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KENNETH A. KOBE U N l v B a s l ~OF ~ TEXAS ADBTIN.TEXAS
properties and separation, manufactured gas, margnxine, matches, meat and meat products, metallic coatings and metallography. The inorganic chemist will find the metals iron, lead, lithium, magnesium, and mercury, their alloys, compounds, and preparations. The section on isotopes is an excellent survey of this subject. The organic chemist will be particularly interested in the sections on isomerieation, ketones, lactic aoid, lactones, maleic acid, mdonic acid, and menaptans. The biochemist dso has sections on lecithin, lignin, lipids, malaria chemotherapy, malts, and malting. The physical chemist will find only three sectiona of special interest: low temperature technique, mass spectroscopy, melting and freezing temperatures. Two sections deserve special attention by all chemical personnel. The section on laboratories mints out desirable con-
THE PHYSICAL CHEMISTRY OF SURFACE FILMS William D. Harkins, University of Chicago. Foreword by Peter Debye, Cornell University. Reinhold Publishing Corp., New York, 1952. xvi 413 pp. 214 figs. IS X 2 3 cm. $10.
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THE name of Harkins has long been associated with funds, mental studies of the nature and properties of surface films. It is indeed fortunate that, before he died last year, he was able to finish the writing of this hook, in which he has summarized his ideas and the methods and results of his researches in this important field. Three of the ehapters-those dealing with The Nature and Energetics of Surfaces, Films on Liquids, and Films an Solids-are revisions of articles published by him in the series of volumes on "Colloid Chemistrv." - , edited hv Jerome Alexander. To tlwsr llnrkins has added new rlmpter~~u pn>pcrricaof soap solutions and mcrhnniam oi emulaion pdyrncrirxtion, the l ~ t r r r dealinu with the auth
