Photometric Chemical Analysis. (Colorim- water, conversion table of liquid capacity etry and Nephelometry.) Volume 11. units, atomic weights, and logarithms. Nephelomew. JOHN H. YOE, Ph.D., Every analysis is fully described and Professor of Chemistry, University of discussed, with especial attention to Virginia, with contributions to Volume errors, etc. The original literature refer- I1 by HANS KLEINMANN. M.D., Ph.D., ences are furnished with each procedure. Privatdazent, Chemical Department of The hook is abundantly interleaved with the Pathological Institute, University cross-section paper, there being a page or of Berlin. John Wiley and Sons, Inc., so for every procedure. Thus the data New York City (also Chapman and for a given analysis may be plotted where Hall, Ltd., London), 1929. xvii + 337 they will be most useful. Of added inter- pp. One photograph, two plates, and est are the photograph of T. W. Richards forty-four figures. 23 X 15 cm. 54.50. and facsimile letters written by him to

The purpose and scope of this book is best stated by its author. "(I) To give an accurate account of the development of nephelometry; (2) to present an impartial discussion of the present status of the theory of nephelometry; (3) to give de- tailed working directions for using a pre- cision nephelometer; (4) to discus nephelo- metric research; (5) to give procedures for the determination of a number of in- organic and organic constituents, and (6) to give an accurate and fairly complete survey of the literature on nephelometry." It is the reviewer's opinion that Dr. Yoe has accomplished his purpose in excellent fashion.

The hook is divided into five parts. Part I deals with the theory, instruments, methods, history, etc., of nephelometry. Part II deals with Inorganic Nephelame- try. The chapter headiigs are Ammonia, Arsenic. Calcium, Chlorine, Phosphorus, Sulfur. Part III deals with Organic Nephelometry. Analyses for acetone, amylase, mustard gas, fats and oils, lipase, nucleic acids, &oxyhutyric acid, pepsin, proteins, purine bases, and trypsin are in- cluded. Part I V is a comprehensive hib- liography. Part V comprises useful tables such as analyses of glassware, data on the strengths of common acids and ammonia, soluhility of several gases in

Dr. Kober. A page of errata in Volume I is also included.

Nephelometry is a worthy companion volume to Colorimetry. The reviewer is pleased to congratulate Dr. Yoe on this very useful and painstaking piece of work. Any teacher of advanced quantitative analysis, or any one engaged in work call- ing for nephelometric estimation, should certainly have a copy of this hook.

MALCOLM M. HARING

The Medical Aspects of Chemical Warfare. EDWARD B. VBDDER, Lieut. Colonel, M.C., U. S. A. With a Chapter on the Naval Medical Aspects of Chemical Warfare, by DUNCAN C. WALTON. Lieut. Commander, M.C., U. S. N. Williams and Wilkins Co., Baltimore, Md., 1925. xvi + 327 pp. 54 illustra- tions. 15.5 X 23.0 cm. $6.50.

The primary purpose of the book is to present practical information about chemi- cal warfare to the medical officers in our military service. The book is so written, however, that i t should he of interest and value to others who are interested in national defense.

The first chapter gives a brief history of the development of chemical warfare.