RECENT BOOKS A GERMAN-ENGLISH DlnIoNARv FOR CHEMISTS. Austin M. Patterson, Antioch College. Seeond edition, John Wiley & Sons, Inc., New York City, 1935. xx 411 pages. 12 X 17.5 cm. Flexible binding. $3.00.
his choice of treatments. The historical approach is by all odds the most informative and inspiring for the beginner. Few people, reading this book. can fail t o have the desire to learn more about these matters. This work is heartily recommended as a text for graduate study and as a ground breaker for anyone interested in mod- chemical thought. UN-PS11Y On MAPWAND MALCOLM M. HARING COLLBCB p e g , MD.
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Only those whose use of chemical German goes back prior to the publication of the first edition of Patterson's "GetmanEnglish Dictionary for Chemists" can appreciate what a tremendous help this book has been t o chemists and chemical engineers. The object of this book is to make it easier for us to use the chemical literature and in the second edition the author has made a very considerable improvement. Not only have more words been added, whose use is shown to be necessary, and this increase may be roughly estimated by noting that the second edition has 411 pages in comparison with 342 for the first edition with its addenda, but throughout the entire dictionary a close inspection indicates that many new translations have been added for a large number of the German words. Indeed, the reviewer looks upon this new edition as almost a rewriting of the first edition. On the other hand, the author has not unduly enlarged the dictionary by the addition of German words whose translation is self-evident. The author has retained his very excellent and useful introduction, wherein some of the basic principles of German chemical nomenclature are discussed. The entire dictionary is a scholarly and a most important work. It is indeed hard to see how gny chemist or chemical engineer can eet alone without a couv of "Patterson" a t his rixht band.
UNIT PROCESSESIN ORGANICSYNTHESIS.P. H. Gropgiw, Editor-in-Chief. The Color Laboratory, U. S Department of Apricultwe. F i s t edition McGraw-Hill Book Company, Inc., New York and London, 1935. xii 689 pp. 15 X 23 cm. 55.50.
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The purpose of this hook, as stated by the author, was to compile a text for advanced students in chemistry and chemical engineering, arranged as a study of the unit processes involved in organic syntheses of the type carried out in industry. This involves, according to the author, an examination of the reactants, an inquiry into the mechanism of the reaction, a knowledge of the chemical and physical factors involved, observation regarding the design and construction of equipment, and finally a study of typical technical applications. The book was edited by Dr. Groggins, with the aid of ten contributors who wrote the articles on special fields. As might he expected in any book composed by a corps of specialists, there are a few discrepancies between the statements made on tbe same subject in different places in the volume, but these may he regarded as differences of opinion rather than errors. The hook appears to be admirably suited to the purpose for which the author states it is applicahle-a textbook for advanced students in chemistrvand chemical ensineerine. The unit processes are disaisqed logically, clcarly, and without undue entpha..is upon either [he theory or pracrsr., so that the studrnt should ohrain a good Ilird's-e).c view of each of the unit processes discussed. The unit pmceSses themselves are well selected, covering the chemical reactions involved in industrial synthetic organic chemistry quite comprehensively. The book is well indexed, and we believe it a valuable addition to the literature of this field.
S ~ R u c r u n eAND PROPERTIES OY MATIER. Herman T. Briscoe, Professor of Chemistry, Indiana University. First edition. McGraw-Hill Book Company, Inc., New Yark and London, 420 pp. 139 figs. 14 X 20.5 cm. $3.75. 1935. x
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This book is neither a comprehensive treatise, critical review, nor popular work on the subject. It is an attempt "to interpret from the chemist's point of view some of the facts and opinions concerning matter as they have been discovered or suggested from the time of Aristotle t o the time of Bohr and Schrcdinger." I t is the outgrowth of several years' lectures designed to give graduate students in chemistry, not specialists in this narrow field, a good idea of the trend and possibilities of modern thought. The development of the theme follows the historical order. Beginning with the Greek philosophers, the author takes us rapidly through the time of Dalton and the ~oqrkof MendeMeff to the beginning of the 20th century. Then In order are discussed radioactivity, the electron, protons and other positive particles, the atomic nucleus and the determination of the nudear charge, the structure of crystals, the structure of the atom from the standpoint of the octet theory, radiation, the structure of the Bohr atom and the origin of spectral lines, electronic distribution about the nucleus, valence, and the new quantum mechanics. Fifty-six pages are devoted to the last subject alone. Although the book is professedly somewhat elementary in character, nevertheless many of the more important mathematical relationships are ably discussed and even derived. There are abundant illustrations. Literature references are scanty, but t o each chapter is appended a very good list of highly speialized, original, and authoritative works on the subject. The style is clear and attractive. The author shows a knack for the use of helpful analogies. The introduction states that many subjects have been omitted. To a certain extent, this is true. Raman spectra and kindred suhjects are ignored and Perrin's work on the Brownian movement is dismissed with a word. Nevertheless, the author has been too modest in his claims. Here is, indeed, a full-coune dinner for the graduate student who wishes to become oriented and lav a 6rm foundation for further study. The reviewer wishes to compliment Dr. Briscw especially on
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QLTAN~lmTIvE Cltan!rcAL ANALYSIS.Arfrul Stock. Pmfersor in the Technical High School at Karisruhe, and ~lrlhurSlohlcr. I~nivcrsilvof Berlin. Translated from the fourth Gern~nnedition by winton Petnode, Research Chemist, General Electric Company, and L. M. Dennis.Emeritus Professor of Chemistry a t Cornell University. McGraw-Hill Book Company, Inc., New York City, 1935. x f 176 pp. 30 figs, 13.5 X 20.25 cm. $1.75.
he hook contains six chapters, as follows: Chapter I. Introduction Chapter 11. General Considerations (apparatus, technic, etc.) Chapter 111. Volumetric Analysis Chapter IV. Gravimetric Analysis ChapterV. Electroanalysis Chapter VI. Electrometric Volumetric Analysis The volumetric analysis includes the usual standardizations of acids and bases, also of oxidizing and reducing agents. There are the usual oractice titrations. Perhaus the unusual thine is the reduction of nitrates with ~ e v a r d a ' salloy ( C U - A l - ~ n r There are the usual oxidations and reductions, and also such precipitations as that of silver as thiocyanate and as chloride (Gay-Lussac method). Zinc is precipitated as ferrocyanide. The gravimetric work includes, among other things, the usual
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