BOOK REVIEWS zelius, Merck, Mohr, etc., had already appeared hut Dr. von Dechend had the brilliant idea of giving her readers 8, bird'seye view of Liehig's life by means of key excerpts from letters, newspaper and journal articles, etc., dealing with important events in which he was involved. After an appropriate Foreword by Willy Hartner, the stage is set (in this supplemented edition) by reprinting the autobiographical notes (first published in 1926) in which Liebig gives a survey of his early years, his training in Paris, and the start of his teaching and research career a t Giessen. The letters are arranged in chronological order, from 1820 when he entered the University of Bonn, t o a few week before his death ( s t Munich, April 18, 1873). The letters written by Liehig are placed on the left page, those written to and about him on the facing right page. The excerpts deal with chemical, family, and political matters as might be expected. The author has thoughtfully supplied a bibliography of 369 publietstions and directs the reader to the proper member of this list so that the entire original can he consulted if need be. In addition, she has supplied authoritative notes regarding certain topics. Another appendix supplies information about the main persons dealt with in the text. A short list of publics, tions (ahout 25) gives the principal sources of information about Liebig. Letters such as these afford 8. hehindthe-scenes glimpse into the life and feelings of these correspondents. They, like Liehig, wrote their letters in longhand and hence without the bothenome intervention of a secretary whose presence frequently has an inhihitory effect. In her opening remarks the author expresses the hope that the living impression left by the perusal of these excerpts may incite the reader to delve deeper into the lives and careers not only of Liehig hut also his correspondents, both friendly and critical. This is an unusually interesting book.
RALPHE. OESPER Unive&y of Cincinnati ('lncinnati. Ohio
Magnetism: A Treatise on Modern Theory and Materiolr. Volumes 1 and 3 Edited by George T. Rado, U.S. Naval Research Laboratory, Washington, 11. C., and Harry Szchl, University of California, La Jolla. Academic Press, Inc., New York, 1963. Figs. and tables. 15.5 X 23.5 cm. Volume 1, 688 pp. $19; Volume 3, xii xii 623 pp. $18.
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These two volumes, plus Volume 2, which is in preparation, give a worthwhile and unique compilation of information h x ~ tmagnetically ordered materials. ( V r m t i n ~ r don nnnna A X l 9 )
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Chemical Education
BOOK REVIEWS I t should be emphasized that, despite the title, the treatise i~ not concerned with diamagnetism or paramagnetism hut deals only with ferromegnetiam, ferrimagnetism, and antiferromagnetism. Hence, it will be mainly of interest to the solid-state chemist or physicist, but others interested in physical properties and their relationship to structure will find the reading of selected chapters useful. Each volume contains ten to twelve chapters written by specialists. In general, the chspters are good, concise reviews covering not only the fundamental hackground material hut, also, the most recent developments; in some chapters there is considerable discussion of are= that need extensive further study, e.g., the optical properties of magnetic materials. While many of the topics are theoretical and can urohithlv he of value to exoerts only, there are several chapters in Vol&ies 1 and 3 which can he read and understood by chemists or students who are not actively doing research on magnetic ordering. The fundamental nature of the chapters plus the very fine bibliographies supplied with each chapter make them useful for assignment to students who wish to study such topics of current interest as Antiferromagnetic and Ferrimametic Resonance, Magnetic Annealing, Magnetism and Crystal Structure, Neutron Scattering by Mawetic Cry&ds, or Preparation and Crystal Synthesis of Magnet,ir Oxides. The first two chapters are in Volume I and the last three are in Volume 3. Also, of vdue for the understanding of the other chapters is a discussion of exchange interactions in the second chapter of Volume 1. Other t0~icScovered in Volume I are Spin Rmdtonians, Weak Ferromawetism, Anisotropy and Magnetostriction, Optical Spectra in Magneticelly Ordered Materials, Spin Waves, Ferromagnetic Relaxation and Microwave Devices. The chapters in Volume 3 include: Evalue, tion of Exchange Interactions from Experimental Dab, Spin Configuration of Ionic Structures, Spin Arrangements in Metals. Fine Partirles and Thin Films, Permanent Magnet Materiala, Micromagnetks, Domains and Domain Walls, and Ma~netisation Reversal. The material in Volume 2 will he concerned with such topics as magmetic symmetry, hyperfine interact i o n ~and , superconductivity. The volumea seem t o he more oriented oward the bheoreticrtl approach, and one wishes that there had been more examples of the treatment of experimental data in terms of the theory. In addition, it would have heen helpful to include extensive tables of experimental data so that the reader could compare saturation moments, N e d temperatures, etc., for different compasibiona and structures. A good example of this type of treatment is the recent hook entitled "Magnetism and the Chemical Bond" by Goodenough. There is no formula index so the volumes cannot he used readily to look up the magnetic properties of specific materials. CARLW. M ~ E L L E R The University of Cmneelieut Stows
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Chemicol Education
