374 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS examples of such important papers which may go unnoticed by in- terested workers. Many of the authors are recog- nized authorities in their field and are undoubtedly invited to present their work at many such conferences. It is, therefore, not surprising to find that Chapter 15, "An Electron- microscopic Study of Genetic Errors in Keratinization in Man" by G. F. Wilgram, J. B. Caulfield, and E. B. Madgic, is practically an exact dupli- cation of their recently published work, "A Possible Role of the Des- mosome in the Process of Keratiniza- tion," which appeared in The Epi- dermis (edited by W. Montagna and W. C. Lobitz, Jr., The Academic Press, New York, 1964 pp. 275- 301). The book is remarkably free of errors and is printed on an excellent grade of white glossy stock it is profusely illustrated with magnificent graphs, charts, and high quality photomicrographs and electronmicro- graphs. The papers are well docu- mented with references, and the index is complete and of great value• While this book will make a worth- while addition to a reference library, it is doubtful that most of the highly specialized papers, such as "Tissue Interactions in the Morphogenesis of the Feather" by M. E. RaMes, "The Structure and Development of the Squamate Epidermis" by P. F. A. Maderson, "The Hair Cycle in the Chinchilla" by A. G. Lyric, or "Hair Growth and Moulting in the Southern Elephant Seal" by J. K. Ling, would be of widespread interest to the cosmetic chemist.--Ci•ARLES Fox--Warner-Lambert Research In- stitute. CATALYTIC HYDROGENATION by Robert L. Augustine. Marcel Dek- ker, Inc., New York. 1965. 118 pages, indexed. Price $8.75. The author states in the introduc- tion that this book is intended to "serve as a digest of the literature pertaining to the synthetic applica- tions of catalytic hydrogenation and that by its use the organic chemist, whether graduate student, technician, or experienced worker, will be able to determine easily and quickly the proper conditions to use for a given hydrogenation." As one reads the book it becomes obvious that the author fully accomplished his task and supplied the organic chemist with a factual, concise and lucid presentation of the various aspects of hydrogenation. In every chapter the author attacks the subject without lengthy introductions mechanistic implications are omitted and details kept to a minimum by referring the reader to the original articles. The book is divided into six chap- ters, each one provided with its own list of references they include arti- cles published in 1964. Chapter 2 covers laboratory ap- paratus and techniques. It deals with various types of high-pressure, low-pressure and atmospheric-pres- sure equipment the last category includes micro-hydrogenators and

JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS 375 techniques for hydrogenations on chromatography-paper. Chapter 3 is devoted to catalysts and reaction conditions. After re- viewing the various catalyst-systems used in hydrogenations, the author examines the effect of temperature, pressure, solvents and quantity of catalysts on reaction rate and selec- tivity. Of particular interest to the or- ganic chemist are chapters 4 and 5, which cover hydrogenations of func- tional groups. Chapter 4 deals with hydrogenation of olefins, acetylenes and aromatic compounds, while Chapter 5 is devoted to hydrogena- tion of aldehydes and ketones, car- boxylic acids and derivatives, nitro groups, nitroso compounds, azides, nitriles, oximes, amines, imines and heterocycles. In a condensed form the author examines the factors in- volved in the hydrogenation of vari- ous functional groups, such as cata- lyst selectivity, stereochemistry, etc. The reactions are very well illus- trated with chemical formulation. Chapter 6 deals with hydrogenoly- sis of organic compounds. The pat- tern is the same as in chapters 4 and 5. The book closes with four ap- pendices describing in detail the preparation of various hydrogenation catalysts. The organic chemist will find much use for this book. It eliminates the need for a preliminary literature survey and contains very helpful technical and chemical information.-- KALMEN MoT•uK--American Cho- lesterol Products, Inc. PARTmL• S•z•, by Richard D. Cadle. Reinhold Publishing Corporation, Nexv York, New York. 1965. 319 pages, illustrated and indexed. Price $16.50. This book deals primarily with a discussion of particles--liquid or solid--suspended in a gaseous me- dium. Although the book is divided into six chapters, the book actually contains only two sections, one on theory and one on practice. As is customary in books on particles--and a must in a book on particle size-- much of the theoretical portion is devoted to size distribution and distribution functions. The book also considers in some detail theories of light scattering and methods for the determination of particle size, sedimentation, and related physical measurements. Of greater interest to practicing cosmetic chemists are the chapters on application. Thus, Chapter III-- Physiological Action--should be of interest to the cosmetic formulator and the plant supervisor who is responsible for the safety of em- ployees. The last chapter of this volume deals with the importance of particle size in fine particle tech- nology and discusses--among other subjects--industrial problems of the paint and pigment industry and of the aerosol industry, subjects of immediate interest to cosmetic chemists. Over-all, this book is strong in theory (about 150 pages) the practi- cal emphasis is placed on air pollution and the production of clean air