BOOK REVIEWS 81 has been described in detail. A very good classification of synthetic detergents and a concise description of their manufacture has been in- cluded. Particularly well described is the sulfo-chlorination according to Reed and Horn. References to the general literature are made but fre- quently are not sufficiently specific. The book should be of value to the European soap technician. To the American reader it discloses a limited amount of interesting data on soap and intermediate products and their processing which are not generally known and which may be important enough to make the pur- chase of this volume profitable.-- H. G. Kt•tSCI•ENBAUER, Colgate- Palmolive-Peet Co. CONDUCTIMETRIC ANALYSIS AT RA- DIo-F•tEO. UENC¾, by G. G. Blake, 109 pages, size 51/2 X 81/2 inches. Chemical Publishing Co., Inc., Brooklyn 2, N.Y. Indexed and il- lustrated. 1952. Price, $2.75. The book consists of nine chapters and an appendix of 25 pages of mis- cellaneous data, almost a quarter of the book. The author supplies a special introduction to the first U.S. edition, summarizing recent and additional knowledge, which is to be studied only after the rest of the book has been read. The book is essentially a study of the author's own methods, which seem well described, though briefly. The author assumes he is address- ing a well-informed audience in the field of electronic instrumenta- tion. Hence the scope of the book is limited. While the applications for radio- frequency methods of analysis are varied, they are in very limited commercial use. This book will serve but a little in expanding this field.--M. G. D•.NAVAaaE. A CONDENSED CHEMICAL DICTION- AP.¾, Francis M. Turner, Editorial Director, 721 pages, 6 X 9 inches. Reinhold Publishing Corp., New York 18, N.Y. 1950. Prices, $10. This is the Fourth Edition of an earlier work, published for the first time in 1919. The text is handled as a diction- ary, giving brief information on each entry. To test thoroughness of coverage of the 23,000 entries, this reviewer tried to find various com- monly used cosmetic materials and their brand names. Everything from Arlex to Zopaque was there. Isolated instances such as Tegin and Protegin were absent but Parasepts, Escolols, Chlorohydrol, and the others were there. Only one proofreader's error was found in the spelling of "glyceryl borate" under Boroglycerides on page 107. The typography and layout are excellent. The presence of trade name is a useful and fairly complete addition. This is a practical book for busy men, technical or not. Everyone should have it.--M. G. D•-NAvAR•E. COLLOID SCIENCe-. Volume I, Ir- reversible Systems. 389 pages. Vol- ume II, Reversible Systems, 753 pages. Edited by H. R. Kruyt. Illustrated, indexed. Elsevier Press Inc., Houston 6, Tex. Price, Vol- ume I, $11 Volume II, $11.50. 1952. Initiated before World War II, these volumes are outstanding be- cause they present studies on the

82 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS colloidal state from an original and different approach than the usual. Many chapters are quite mathe- matical, though necessary for the treatment desired. Some subjects seem to be covered in a sketchy manner such as the chapters dealing with emulsion and rheology. A few classical writers, such as La. ngmuir and Debye, get scant mentmn. It is a peculiar and difficult task to edit manuscripts on different though related phases of a subject and to maintain a similarity of style and a smooth continuity. Editor K. ruyt has done well in this connec- tion. A few scattered errors were noticed, most of which were cov- ered by a pink slip entitled "Er- rata." One gets the impression that the work was written under difficult circumstances and perchance all the literature on the subject was not readily available for checking. Even so, this set of volumes will undoubtedly set a new standard for all work on the colloidal state.-- M. G. DENavarre. RADIOISOTOPES IN INDUSTRY, edited by John R. Bradford, 309 pages, 6 X 9 inches, illustrated and indexed. Reinhold Publishing Corp., New York 36, N.Y., 1953. Price :/ 8.00. Fourteen chapters, written by as many contributors, with little dupli- cation, is a tribute to the editor. For the contents are based on lec- tures given at an international con- ference in 1951 at the Case In- stitute of Technology. The material seems to be up to date as of the time of preparation of the lectures. More recent data like the use of iridium 192 might have been added in the galley proofs. Chapters on "Radiation Protec- tion" by Glasser, "Applications of Radioisotope Techniques" by Rosenblum, as well as the Editor's own contribution, strike this re- viewer as being unusually good. This reviewer would like to sug- gest to the Editor that in future edi- tions, a brief introductory chapter on the general subject of radioac- tivity and nuclear reactions would not be amiss. Neither would it hurt the text to have a glossary of terms, for while many of us are ac- quainted with nuclear reactions, a brief review simply polishes our knowledge. If you are toying with radioac- tivity and its uses in industry, you can't be better informed than by reading and using this book.-- M.G. deNavarre. ULTRAVIOLET RADIATION, by Lewis R. Koller. John Wiley & Sons, Inc., New York, and Chapman and Hall, Ltd.,London. 1953. This is an eminently useful book. It acquaints the interested chemist, physician, biologist or bacteriologist with the different forms of ultra- violet radiant energy. Thus the chapter on "Arcs" first discusses the characteristics of this source of radiation and then proceeds to a description of the several different types of mercury arc and mercury vapor lamps, including sunlamps and germicidal lamps. Charts of spectral energy distribution illus- trate the performance of all the numerous radiation sources dealt with, and. indicate their actual and potential fields of application. Of particular interest is the chap- ter on solar radiation, in its physi- cal, climatic and geographic aspects. Although in the preface to the book