SPECTROSCOPY AT RADIO AND MICROWAVE FREQUENCIES
D. J. E.
Ingrom, Ledurer and Research Fellow, University of Southampton. Butterworths Scientific Publications, London, 1955. xii 322 pp. 73 Figs. Tables. 1 4 X 22 om. $7.20.
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A BOOK covering spectroscopy a t radio and microwave frequencies is an ambitious undertaking for any author. This book is a. successful general outline of these fields. The author indicates that he has written for nonspecialists. However, workrra in these fields might . find his exoerimental discussions quite useful. Sufficient theory fa presented to bring out the pertinent factors, and to enable one to understand the nature of the problems involved. The reader is apnred the labor of wading through pages of quantum mechanical derivations. Tho f i s t chapter deals with general features of the spectroscopy, the second with the methods of producing and detecting microwaves, and the third with the techniques involved in handling radiation in the microxwe region. Chapter 4 which deals with the various types of microwave spectroscopes which have s interesting to the reviewer. Chemists been used m ~ particularly might be most interested in Chapters 5 and 6 which deal with the Results and Theory of Paramagnctio Resonance, respectively. The eighth chapter is titled Rsdiofrequenoy Spectroscopy and deals with both nuclear magnetic renonanoe and pure quadruple resonance. The final chapter which treats Applications of Rsdiofroqueney rtnd Microwave Spectroscopy is divided into two parts-"Application to fundamental research" and "Applications of a practical nature." The reader might be impressed with the wide-applicability of these fields. He might also be offended to note that chemical analysis and doteetion of free radicals are found only under the second part. The boak has many references, an appendix listing pertinent equations and definitions, and an author index and a subject index. A erystsl multiplier of the type used a t Duke University is described on pagc 56. The author says that the cat's whisker is advanced toward the crystal by a screw mechanism. Aotually in practice the crystal is advanced toward the stationary xrhisker. He also indicates that m o ~ of t millimeter wave work has been done in s. complicated setup s h o r n on page 80. Actually much of the good work in this region bas been dono by a simple video system. I n spite of these minor criticisms the reviewcr particularly liked the discussion of experimental setups. Anyone interested in learning about the developments and possibilities in this field might find this a profitable and interesting boak. The paper and type are easy to read. The binding of the review copy was broken on arrival. A broken binding is afeaturc this book has in common with most of the hooks of British origin on the reviewer's bookshelf. ALBERT W. JACHE Aanrcu~~un*'A w n M~c"*aic*r.C O L L E OP ~ ET E X * ~ COLLSGE STATION, TEXAS
PROBLEMS AND CONTROL OF AIR POLLUTION Edited by Frederick S. Mollette, Executive Secretary. Committee on Air.Pollution Controls. The American Society of Mechanical Engmeere. Reinhold Publishing Corp., New York. 1955. vi 272 pp. Figs. and tables. 1 6 X 23.5 cm. $7.50.
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Tars book is a collection of 25 papers presented in New York, March 1-2, 1955, s t the First International Symposium on Air Pollution under the sponsorship of the American Society of Mechanical Eneineers.
turies to study the problems and make recommendations. These Commissions did an excellent job of fact finding but unfartunately~. they were not permitted to interfere with industry so their (Continued on page AS&) A344
JOURNAL OF CHEMICAL EDUCATTON, AUGUST, 1956
