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NEW BOOKS
Grundbegriffe der Chemie. By E. RABINOWITSCH. 151 pp.; 2 figs. Sammlung Goeschen. Berlin and Leipzig: Walter de Gruyter and Co., 1930. The fundamentals of chemical thought are told in as concise a manner as is possible in such short space. This forced brevity makes the book of little value to the uninitiated, but the reader conversant with physical and chemical thought will find the little volume an interesting review of chemical theory. It should be of especial interest to American students of chemistry who wish to improve their knowledge of chemical German, for the style is very clear and the book maintains the high standard of this collection of scientific writings. GEORGEGLOCKLER. The Quantum Theory. By FRITZREICHE.Translated from the German by H. S. Hatfield and H. L. Brose. London: Methuen & Co., Ltd., 1931. This little volume contains an excellent treatment of the earlier quantum theory, -Planck to Bohr. It is very readable and should serve well students who wish to become acquainted with the earlier developments. The additional notes and references are very helpful and anyone desirous of studying in the field of modern theoretical atomic and molecular physics could well start his course with this volume. No attempt is made to take the newer theories of wave mechanics into account, although they are introduced in the later chapters and a sufficient number of references are given to enable one to go to the original literature. Moreover, individuals already acquainted with the topics dealt with will enjoy the treatment accorded the subject, and i t is well worth anyone's time to read this book. GEORQE GLocKLEn. Die Chemische Emissions Spektralanalyse. By W. GERLACH A N D E. SCHWEITZER. 120 pp; 35 figures. Leipzig: Verlag von L. Voss, 1930. The authors cover mostly their own work and experience in the spectroscopic analysis of metals. The fundamental principles and the equipment used in both qualitative and quantitative procedure are discussed in seven chapters. The reader can get a fair idea of both the successes and the difficulties of this mode of analysis. GEORQEGLOCKLER. Vorlesungen iiber U'ellenmechanik. By A. LANDE. 132 pp.; 15 figures. Leipaig: Akademische Verlags Gesellschaft m. b. H., 1930. These lectures were given by Professor Lande a t the Ohio State University, Columbus, Ohio, and cover the field as i t had been developed a t the time. Since so many topics are treated it follows that the statements of individual problems are very brief, and the book should be most satisfactory t o the student who already has a good knowledge of this branch of modern physics. Anyone building a library on quantum mechanics will be glad to add this summary of the subject to his collection, and t o use it as a reference book. GEORQEGLOCKLER. Les ThborBmes de Conversation dans la ThBorie des Chocs Ihclroniques. By L. GOLDSTEIN.26 pp. Monograph No. 70 of the scientific and industrial series published by Hermann & Co., Paris, 1933. This volume is the ninth of the series on theoretical physics published under the direction of Professor L. de Broglie. The author shows by the mathematical methods of wave mechanics, using Born-Dirac collision theory, that the laws of conservation of energy and momentum are contained within the frame-work of these theories. GEORQEGLOCKLER.
