BOOK REVIEWS 129 form. Indeed, the first 278 pages are a practical exposition of col- loidal behavior brought up to date. The title of this book is somewhat misleading. It is hoped it will not affect its use and sale. Indeed, one would think it a book on gums and closely related products. While it does include a brief discussion of a number of gums, this subject is only minor subject in the volume. Instead, colloidal phenomena in all its organic manifestations-- hormones, fibrous proteins, syn- thetic macromolecules (nylon), P- VP, emulsions, nucleic acids, starch and milk are samples of the wide range of subjects discussed. The author makes good use of illustrations and tables to elaborate his text. This is one of the most unusual and undoubtedly most useful books this reviewer has been privileged to read. It is recommended to all in this industry.--M. G. NAVARRE. ION EXCHANGERS IN ORGANIC AND BIOCHEMISTRY, edited by Calvin Calmon and T. R. E. Kressman. Interscience Publishers, Inc., New York 1, N.Y. 1957. 761 pages, size 61/4 X 91/4 inches, indexed and illustrated. Price $15.00. The importance of ion exchange phenomena and techniques in van- ous phases of biochemistry and or- ganic chemistry needs very little em- phasis. Living systems exhibit many, many ion exchange phenom- ena and investigators, studying the chemistry of such systems employ many ion exchange techniques in the course of their studies. The volume, "Ion Exchangers In Organic & Bio- chemistry," is therefore a most welcome addition to the literature. The editors of this book, Calmon and Kressman, experts in their own right, have assembled an impressive array of talent in their efforts to summarize the principles and practices of ion exchange in the fields of organic chemistry and biochemistry. The book is composed of three major sections. The first two parts deal with material of a general nature and the third deals with specific applications. Part 1 includes discussions on the nature and types of ion exchange materials, swelling and equilibria, kinetics and adsorption of non- electrolytes and chromatographic phenomena in columns. Part 2 deals with materials, techniques and apparatus, including commercial materials, simple pro- cedures, techniques of ion exchange chromatography, ion exclusion and mem branes. Part 3, the major portion of the book, deals with specific applications including bone as an ion exchange system, ion exchange properties of cells and tissues, bacteriology, vi- rology, separation ofamino acids and pe. ptides, chromatography of pro- te•ns and nucleic acids, nucleic acid derivatives, chromatographic investigations of non-steroid hor- mones, separation of carbohydrates, isolation and analysis of urine, application in blood, sodium-potas- sium removal in the body, gastric acidity, miscellaneous medical and pharmaceutical applications, ex- change adsorption in man, isolation and purification of antibiotics, vita- mins, alkaloids, ion exchangers of plant origin, ion exchange in plant physiology, purification of sugars and alcohols, treatment of alcoholic beverages and fYuit juices, milk and milk products, ion exchangers in organic chemistry, ion exchangers as catalysts and water treatment. The only criticism the reviewer has of this book is that some of the material contained in Part 1, 2 and

130 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS the end of Part 3 are well described in several general books on ion exchange and might have been deleted. However, the inclusion of this material will probably be wel- comed by those workers in bio- chemistry who are totally 'unfamil- iar with ion exchange. The chapters on the separations and chromatogra. phy of amino acids, peptides, proteins, nucleic acids and their derivatives, and carbo- hydrates deserve special mention because of their thoroughness. Each chapter has an excellent bibliography. The book will be a "must" for most workers active in biochemical research.--RoBERT KUNIN, Rohm & Haas Co. PURITY CONTROL BY THERMAL ANALYSIS, edited by W. M. Stair. Elsevier Publishing Co., Amster- dam, D. Van Nostrand Co., Inc., Princeton, U.S. Dist. s•ze 91/4 X 61/4 inches, indexed and illustrated. Price $4.75. This book is a collection of sixteen papers which were delivered at the International Symposium on Purity Control by Thermal Analy- sis held at Amsterdam in 1957. The papers cover theory, applica- tions and apparatus for thermal analysis. Two of the papers are in German however, all have a compendium at the end in English, French and German. The book includes a digest of discussions listing the participants. The theoretical papers begin with a discussion of the mechanisms of melting and the formation of solid solutions. This is followed by a discussion of the behavior of highly branched hydrocarbons in the solid state. One of the theoretical papers is concerned with some of the factors which govern the choice of method for purity determinations by cryoscopy. The editor's paper dis- cusses the errors occurring in the determination of temperature-heat content curves. Three of the papers deal with the calculations and accuracy of cryoscopic data. Papers on applications of thermal analysis include: determination of pur!ty of benzene, melting point purity determinations, thermal anal- ysis of normal alkanes, and freezing point and heating curve behavior for an organic reciprocal salt pair system. Two papers are concerned with experimental methods and evaluation of constants for the determination of purity by cryos- copy. The three papers on apparatus described the equipment and elec- trical circuits for an automatic adiabatic low temperature calorim- eter, a simplified calorimeter for the precise determination of purity, and an automatic apparatus for the determination of melting curves. This book should prove helpful to those concerned with the analy- sis of pure substances from a scientific as well as a quality control consideration. It also serves as a good basis of comparison with other methods of analysis such as chroma- tographic and dilatometric.-- MORRIS J. ROOT, G. Barr and Co. TEXTILE CHEMICALS AND AUXIL- IARIES, edited by H. C. Speel and E. W. K. Schwarz. Reinhold Pub- lishing Corp., New York 22, N.Y. 545 pages, size 91/4 X 6 inches, illustrated and indexed. Price $13.50. This second revised edition has an additional editor, E. W. K. Schwarz, over the one editing the original edition. It also contains market research data, so important in today's chemical progress.