BOOK REVIEWS 507 addition, elimination and rearrange- ments are treated in separate chap- ters. These are followed by chap- ters on miscellaneous reactions and one on oxidation--reduction and ha!ogenation. The reaction mech- amsms are all illustrated with examples, and usually a leading reference to very modern work is in- cluded as a footnote. If the mecha- nism offered has not been proved by experimental evidence, this fact •s stated. The book is almost entirely free of typographical errors although two were noted. On page 75 hydrolysis of RHCHC12 should require two moles of water instead of one as written in equation at top, and on page 102 "anilene" should read aniline. A difference of opinion exists on page 85 where the radi- cal intermediates as written seem to violate the octet rule for orbi- t:Is. This book is heartily recom- mended to anyone who wants to be- come acquainted as painlessly as possible with the modern theories of why organic reactions give the products they do.--WILLIAM HUNTER, Raymond Laboratories, Inc. APPLIED X-R^¾s, by George L. Clark. McGraw-Hill Book Co., Inc., New York 36, N.Y. 1955. 843 pages, 6 X 9 inches, indexed and illustrated. Price $12.50. This is the fourth edition of an exceedingly popular book on the subject. Publication of this edi- tion coincides with the sixtieth anniversary of R6ntgen's discovery of x-rays. The many pages are divided into two parts: (1) general physics and application of x-radiation and (2) the x-ray analysis of the ultimate structures of material. The pres- ent edition finds much of its new material in the second part of this work. From basic phy.sics to three di- mensional projecnon of complex chemical formulas, author Clark lucidly carries his readers with re- laxed dexterity. For he has lived the subject during his professional life, and his book for almost thirty years. One cannot recommend this book too highly. Every chemist worth his salt needs it to understand apd do his work better.--M. G. DENAVARRE. DER SellWEISS, bY Herbert P. Fiedler. Editio Cantor, Aulendorf i. Wurtt., Germany. 1955. 282 pages, 5a/4 X 81/4 inches, indexed and illustrated. Price $6.20 DM. This rather stimulating work covers a wide variety of subjects ranging from the kinds of perspira- tion, its role in the human, its chemistry, disturbances of sweating to 118 pages describing various deodorants and antiperspirants. Since this is a large portion of the book, cosmetic chemists should be interested in examining this if nothing more. In addition, there are almost 1100 references men- rioned in the text and listed at the end of the book. These are of many vintages but are up to date includ- ing 11 references to Shelley's work on the subject. The deodorant and antiperspirant formulas which number 292 in all, are of mixed quality, some good and some not as good. A great many are taken from the literature. There are quite a few patent listings. This has been a needed book. You will find it loaded with useful material.--M. G. DENAVARRE. THE SCIENCE AND ArT OF PER- FUMERY, by Edward Sagarin. Greenberg, Publisher, New York 22,

508 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS N.Y. 1955. 220 pages, 8 X 51/• inches, illustrated. Price $3.50. An only slightly changed second edition of the sold-out print of ten years ago, this book reads more like a review of the story and de- velopment of everything connected with or leading to modern perfum- ery, than a technical treatise of the scientific and artistic aspects of the perfumery practiced today by cre- ative perfumers. But that is just its advantage, its strong position among the other voluminous books on perfumery, raw materials and related subjects with their all- comprehensive d'etails. This excellent little volume does not intend to make a perfumer out of a cosmetic chemist or other non- perruiner. It presents to the at- tentive reader, whether cosmetic chemist or organic researcher, whe- ther executive or apprentice in the cosmetic or fragrance industries, or anybody else connected with or interested in perfume odors, the history, glamour, aesthetic aspects, the raw materials, scope and chem- ical achievements of the perfume industry in general. It successfully captures the at- mosphere in which the modern per- fumer works, the creator of new fragrance types, the duplicator of existing ones. It correctly paints the perfumer as a man of knowl- edge, a scientifically trained, highly sensitive, very versatile, artistically gifted, hard working scent special- ist. A man who on mere thought envisions the advantages and dis- advantages of each of the hundreds of different fragrance constituents he works .wi.th, their particular odor types, or•g•n, chemical structure and physical properties, chemical as well as odor and color stability, volatility, compatibility with other materials, odor strength, lasti.ng- ness, power of diffusion, price, availability, antagonistic and sy- nergistic odor effects, nose appeal, etc., in short, its possibilities and advisability of use for the work he is just doing. Yet, with all these facts known to him, the perfumer still is compelled to carefully ex- periment with the dosing of the con- stituents in his highly complicated odor blends as much as his close colleague, the cosmetic chemist is forced in the course of his experi- ments to make dozens of the same particular set of raw materials, be- fore arriving at the final, stable and otherwise satisfactory com- position of his colloidal system. The contents of this fascinating book should be absorbed by every cosmetic chemist or worker in fra- grance materials, everyone of their associates. It will impart to them pleasure while reading, at the same time giving them an introduction to and understanding of perfumery and the perfumer's intricate work.- DR. O•.tVER I.. MARTON, Shulton, Inc.