JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS 833 complete proofs in every case. The subjects covered range from elemen- tary algebra through analytic geome- try, trigonometry, intermediate alge- bra, differential and integral calculus with applications, and differential equations. Each topic includes a good supply of examples, and each chapter ends with a group of problems for practice, with answers given at the back of the book. There are a few short chapters on elementary statistics, comprising a total of 114 pages, including an intro- ductory section and short chapters on probability, frequency distributions, control charts, sampling, significance tests, analysis of variance and simple linear regression. In sharp contrast to the above material, these give the impression of having been included as an afterthought. They are brief, in- complete and quite inexact. The adult reader would do better to ignore these chapters and, after covering the mathematical material, to consult some more expert text on applied statistics, such as Mandel's "The Statistical Analysis of Experimental Data" (Interscience, 1954). A regrettable omission is the lack of a chapter on matrix algebra, a most important topic in modern applied statistics. Also, there is no material on solid analytical geometry. In spite of these omissions and the short- comings of the statistical section, however, this text is most highly rec- ommended to the audience for which it is intended.--W. M. WooreNo-- Carter-Wallace, Inc. RESEARCH IN SURFACE FORCES. VoL. 2. Edited by B. V. Deryagin. Pp. viii X 320. 1966. Consultants Bureau, New York. $27.50. This is a compilation of the papers presented at the Second Conference on Surface Forces which was spon- sored by the Institute of Physical Chemistry of the Academy of Sciences of the USSR. Volume 1 contains the papers presented at the First Confer- ence on Surface Forces which was held in March of 1960 and which celebrated the 25th anniversary of the Laboratory of Surface Phenomena of the Institute of Physical Chemistry. Academician B. V. Deryagin, in addition to being the editor, is the author of many of the papers. His lead article points out that the empha- sis in Volume 2 is on the three dimen- sional aspects of surface forces. The volume is divided into five sec- tions of about eight papers each: "Theoretical Problems in Sur- face Phenomena," "Electrosurface Forces," "Experimental Studies of the Properties of Thin Films," "Sur- face Phenomena in Dispersed and Porous Systems," and "Surface Phe- nomena in Adhesion and Friction." Over half of the papers are from Deryagin's laboratory at the Institute of Physical Chemistry: however, approximately ten additional labora- tories in the USSR are represented. A wide variety of problems in both fundamental and applied Surface Chemistry formed the subjects of the papers in this volume. This reviewer

834 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS found that there were papers in al- most all of his specific current inter- ests. Further, he felt that in most cases important, new information was contained in the papers. In spite of its high price, this must be considered a convenient source of very important literature in the field of Surface Chemistry.--ALFRED H. ELLiSON-- Gillette Research Institute.