Quantitative Pharmaceutical Chemistry. Second edition (Jenkins

will undoubtedly be ironed out in subsequent editions. The author's style is delightfully convincing. The diagrams, charts, and illustrations are well...
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law of mass action; heterogeneous equilibrium; the solubilityproduct principle; cupredpitation; units used for equilibrium expressions; equilibrium calculations, with special reference to weak acids and weak bases and the common-ion effect; solubilityproduct calculations, the dissolving of precipitates; Werner's coordination theory and complex ions; neutralization and hydrolysis with reference to equilibrium calculations, the pH scale, buffered solutions. and titration; oxidation-reduction equilibria from the standpoint of standard and concentration cells; chemical kinetics, the order of reactions, catalysts; thermochemistry, electrochemistry and photochemistry; the electrical theory of matter, radioactivity, and atomic structure; and the properties of colloids. The text is well suu~ortedbv numerous examoles of all tvoes , of equilibrium calculations. In addition, it contains about three hundred problem^ involving, for the most part, eqilihrium calculations. Answers are also given for many of these problems. Tables of ionization, solubility-product, and other equilibrium constants are placed in appropriate sections of the text. It is unfortunate that strong electrolytes are treated as partially ionized in aqueous solutions. I t would appear that, in light of the modem theories of electrolytes, i t would be more advisable to treat strong electrolytes as being completely ionized. Such a procedure would also have the advantage of simplifying the treatment of ionic equilibria for the beginning student. The text is one of the most comprehensive in its field and should senre as a very valuable aid t o the teacher in the presentation of qualitative analysis and other subjects which engage the student in passing from general chemistry to physical chemistry. I t well deserves serious consideration by every teacher interested in this field of chemistry. I n addition, more advanced students of chemistry will find i t a valuable tool for problems of chemical and ionic equilibria. WARWNC. JOHNSON

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QUANTITATIVE PHARMACEWICAI CHEMISTRY. Glenn L. Jenkins, University of Minnesota, and Andrew G. DuMes, University of Maryland. 2nd ed. McGraw-Hill Book Company, Inc., New York City, 1937. xxv 466 pp. 67 figs. 13.5 X 20 cm. $3.50. The contents of the second edition have been arranged in three parts instead of four. While the authors state that theory has been brought up-to-date, i t may be said with reasonable fairness that perhaps the text is still a bit one of procedure rather than one of the theory underlying these procedures. This is a common criticism of most texts in the fundamental sciences written for any special group. This does not mean that in the hands of a competent instructor this hook may not be used to great advantage. Inasmuch as ~ r a c t i c a l hall students usine this text will " eo into one of the health service prufessions, it is, with the single nitirkm offered above, admtrably adapted to the use of such group