JOURNAL OF THE SOCIETY OF COSMETIC CIII' MISTS 371 It is desirable, of course, to sur- round scientists with an environment which makes their performance as productive as possible. The findings of this study actually suggest manage- ment techniques which would allow a scientist to achieve his full potential. Interestingly enough, scientists per- form better when their activities were fairly thoroughly coordinated and when their "freedom" was somewhat linfited. Similarly, higher perform- ance was achieved whenever there was communication with colleagues and whenever the scientist was allowed to work on three or four research and development functions a sharp low- ering of performance was noted when- ever the number of functions exceeded four. Some other interesting findings reported by the authors concern the influence of the age of the scientists, the time spent in technical work, and laboratory conditions. In reviewing this massive accumu- lation of statistical data, one is struck by the fact that scientists appear to perform better if, as noted above, management employs certain admin- istrative techniques. The question arises whether it is legitimate to as- sume that the caliber of sceintists in the various laboratories is homoge- neous and that comparisons between different laboratories are meaningful. It is quite possible that good manage- ment practices attract or find the more highly endowed and effective scientist poorer management may be satisfied with less capable individuals. Although the book does not answer this puzzling problem, scientists and administrators can benefit much from this significant con tribu tion because it describes either hoxv to attract the well-performing scientist {•r h{nv to make scientists perform well. -hL 5i. Rmt•}•--Waruer-Lambcr t Research Institute. Cormore Cnr• msx•v, by A. Shelndko, Elsevier Publishing Company, Am- sterdam, London, New York. 1•66. 277 pages. Price $14.50. This book was devehq•ed from the lectures giveu by Dr. Shelndko, Pro- fessor of Physical Chemistry at the University of Sofia, Bulgaria. The Bulgarian text (1937-58) was revised and translated into Rnssian in 1960. This material was further revised in the translation to English. The sub- ject is developed from basic principles. Where needed, an adeqnate mathe- matical background is assumed. The whole exposition is very readable. Each chapter is well referenced. The index is confined to major topics only. It is an excellent book for use as a colloid text or as a small reference book. The chapter titles Prepara- tion and Purification of Lyophobic Colloidal Systems, The ()ptical Prop- erties of Colloids, The hIolecular Kinetic Properties of Colloidal Solu- tions, Physical Chemistry of Snrfaces, Electrokinetic Phenomena, Thin Layers, Stability of Lyophobic Sols, and Foams and Emulsions--give an idea of the scope of the book. Con- sidering the total size of the book, the coverage of the more applied areas of the last three chapters is very com- plete and is a remarkal)ly concise ex-

572 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS position of the theories involved in a very controversial area. The fact that this book was written as a teaching text makes it a desirable book for anyone approaching a study of colloid chemistry, particularly for self-education on the background of the many phenomena so important to the cosmetic chemist.--JonN H. WooD-Bristol-Myers Products.