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JOURNAL OF CHEMICAL EDUCATION
carbons do we find the Geneva nomenclature. Following the unsaturates is an entire chapter on gt~solineand rubber. There is also the usual listing of aldehydes, ketones, acids, and the remainder of the aliphatic series. A good chapter on stereoisomerism precedes carbohydrates, amino acids, and proteins. The next chapter is a most excellent introductory discussion of biological processes. Here the main and most recent topics of biochemistry are mentioned and explajned. Although only briefly covered-ach one could be a course in itself-the oonoepts serve to introduce the student to future and more advanced work. Five chapters, 80 pages, are devoted to aromatic chemistry. The four chapters, Polynuclear Aromatic Compounds, Alicyclic Compounds and Related Natural Products, Heterocyclic Compounds, and finally Natural and Synthetic Drugs complete the book. Throughout the hook the authors use the technique for emphasis of new words or ideas by means of italic or bold f x e type. The chapters are all subbeaded to permit the student to think in terms of definite units. The entire hook is well cross-referenced, thus avoiding needless repetition. In the entire book the reviewer found only a few points that need comments. Some of these are a matter of opinion or emphasis. For example, one may feel that the section on Directive Influence of Substituents should be in the very first chapter on aromatic compounds rather than in the second one. The only point for correction noticed is that the new svntbetic analgesic . now has the accepted name of .llcllndo,to; it is uo lon~erh w n as .4midorre. One 1 1 s the freling aitar wading this book that ir is well halanced. i t can br rrcomm~nded:IS o w of the best book$ of its kind today. ARTHUR FURST
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THE SCIENTISTS' READY RECKONER
T m s book is a well thought out collection of vdnable tables and constants for the purpose of chemical laboratory calculations. Not only does it wntsin the expected four- and fiveplace log tables, atomic weights, and higher multiples but also molar and equivalent weights are given with their logs so that wasteful leafing through pages is eliminated. This is also true of gravimetric factms and molecular weights. Other useful sections are those containing densities and temperature conversion tables. Any student or analytical laboratory worker will find s copy of the "Ready Reckoner" a calculation time saver.
MODERN SCIENCE TEACHING
Elwood D. Heiss, Professor of Science, New Haven Teachers College, New Haven, Connecticut, Ellsworth S. Obourn, Head of Science Department, John Burroughs High School, Clayton, Missouri, and Charles W. Hoffman, Instructor in Physics and Physical Science, Temple University, Philadelphia, Pennsylvania. 462 pp. The M a c d a n Company, New York, 1950. viii 60 figs. 14 X 22cm. $4.50.
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"Modern Science Teaching" is a revision of that excellent teaching aid, "Modern Methods and Materials for Teaching Science." . . ~ ... ~The nurnose of the resent edition is twofold: (1) . . to serve as a textbook for eourws in the methods oi reaching seierrcr and (2) to rrrvr as a source bouk for tmvhers and supvrvisord of srienr~. Th? material in the l,ook Li excrllrnt. The book i.i dividcd into three sections. Section one is devoted to the
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GRETA OPPE
HISTORIA DE LOSELEMENTOS Q U ~ I C O S Mary Elvim Weeks, Del Cuerpo de Investigation de Literatura Cientifica en la Kresge-Hooker Scientific Library, Universidad Wayne. Translated by A. Sanmmb Nicolau, Catedratico Numerario de Institub. Manuel Marin, Provenza 273, Barcelona. 523 pp. Illustrated. 17 X 26 cm. 300 Spain, 1949. xiv Ptas.
HISTORIA DE LOS ELEMENTOS ARTIFICIALES
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science such as science clubs, the science fair, the science museum, nature trails, and the science talent search. Teachers and administrators building new schools and maintaining old laboratories will welcome the layouts of the different types of laboratories for the various sciences including elementary science, the storage space suggestions, and the material on care and purchase of equipment. The third section troxts in detail visual aid and projection equipment of all kinds. There is an excellent chapter on photography and another on the use of community resources in science teaching. The appendix is itself a source book with lists of equipment for all the sciences and sensory aids. The selected references are well chosen and offer further reading to the science educator. These notable authors have written a noteworthy book in the field of science educat,ion.
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W. Roman, Chief Analyst of Petrocarbon, Manchester, England. Dr. W. Junk, Publishers, 13, Van Stolkweg, The Hague, Nether lands-Wm. Dawson 8 Sans, Ltd., 102, Wigmorestreet, London, 142 pp. 16 X 24.5 om. IS/-. England, 1950. viii
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principles of science teaching. Section two considew the pmhlem of science moms and equipment. Section three is concerned with a treatment of visual and other sensory aids used in teaching science. Section one discusses the major no& of science teachins. the methods and techniauea of sei&c~iinstruetion.the selee-
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A. Scmmm; Nicolau, Catedratico Numerario de Fisica y Quimica en hstitutos Nacionales. 117 pp. IIlwtrated.
DR. A. S A N R O NICOLAU, M~ Profesaor of Physical Chemistry at the National Institutes of Spain, has translated into Spanish the "Discovery of the Elements" by Mary Elvira Weeks, Research Associate with the Scientific Library of the Kresge-Hooker Scientific Library. He has also introduced some valuahle enlargements, especially concerning the newer elements. The "Discovery of the Elements" through five editions, the last one in 1945, has reaohed a wide and merited circulation. It is written to show scientifically the uwrk done by the men who discovered the elements. With the aid of biographical notes and selected transcri~tionsfrom orieinal documents the reader comr disvovery prellends the m:fignitudr of the prolrlrmo involved i ~ the of rnch element, :lnd nt rhe wmc timr nmrthinp about the life and per.wnslity of thc scieuti.itd. Tho b w h w 4 t s in very iw teresting and instructive reading. In this Spanish translation Dr. Ssnroms has introduced some additional transcriptions from original documents, particularly in the chapters about Spanish scientists. Dr. Sanrom6 includes also his "Historia de 10s Elementos Artificiales," divided into two parts, with a tats1 of eighteen chapters, following the same general plan of the translated book. The first part, in ten chapters, is 8 description of the process of development of the actual methodsin nuclear reactions. The second part gives the history of the elements 43, 61, 85, 87, 93, 94, 95, 96. Thetranslationof the "Discovery" is a very valuable contribution to Spanish scientific literature. The material on the newer elements contributed by Dr. Sanromh increases the value of this book.
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