JOURNAL OF CHEMICAL EDUCATION
AN INTRODUCTION TO ORGANIC CHEMISTRY Alexander L o w y and Benjamin Harrow. Revised by Benjamin Harrow, Professor of Chemistry, and Percy M.Apfelbaum, Assodate Professor of Chemistry, College of the City of New York. Seventh edition. John Wiley & Sons, Inc., New York, 1951. xiv 480 pp. Illustrated. 14.5 X 22 em. $5.
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Tms most recent edition of a long-known textbook follows generallv the plan of its many predecessors. The scope and also much of the wording is essentially unchanged. The timehonored division of aliphatic and aromatic compounds is retained. In addition to the chapters almost universally found in
will not in the opinion of the reviewer be particularly useful t o beginners. Those who have found the previous editions adapted t o their needs should find the present edition adequate. LAWRENCE H. AMUNDSEN UNIVERBITS (IICONNECTICUT smnns. Colrrec~lcrrr
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EXHAUST HOODS
J. M. DallaValle, Professor of Chemical Engineering, Georgia Institute of Teohnalwy. Second edition. The Industrial Press, New York, 1952. vi 146 pp. 127 figs. 30 tables. 15.5 X 23.5 cm. $3.50.
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&&, a h Bismuth Compounds of thk Aromatic 'series; A Brief Review of Common Type Reactions; Plant and Animal Pigments; Enzymes, Vitamins, Hormones; and Nomenclature of Organic Compounds. The t,reatment seems to he slanted somewhat in the direction of mcdieine and the various biological sciences. Also, the emphasis seems clearly to be more upon descriptive chemistry than upon theory. The previous editions have been found useful both in ane-semester courses and the more usual twa-semester courses. Daubt,less the presont edition also will find application in some courses of each length, since it is more extensive than the typical books written specifically far onesemester courses, and less extensive than most of the books usually used in the year course. The factual content actually posaihly approximates more nearly what may reasonably be covered in the longer course. The book is very neatly printed, and for the most part is quite readable. The nomenclature is good, and them is a reasonably sdennate discussion thraunhout the book of nomenclature orineiplra. Much of tbi. material is then pulled together in the final chapter, which is devoted exclusively t o nomenclature. This chapl.er, however, oonsiats primarily of a long lint of names of radicals and of ring systems. This is fine reference material, but ~~
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THIS is a book for ventilation and chemical engineers interested in the fundamentals of aerodynamics applied to removal of contaminated air from a variety of type installations. Starting with chapters on Theory of Flow of Gases Into an Opening, Velocity Characteristics. . . .,Velocity Contours. .,the author proceeds t o consider topics classified by hood types, or general purposes, rather than specific applications. Dusts, mists, fumes, sswdust, flour, ete., serve as central topics. This revised work goes much beyond the first edition which reDort of limited seoue. Manv new was mostlv" a svmoosiurn .. items have been added from industrial and government sources. Problems m e presented with solutions illustrsting calculations in hood design. I t is evident that the author has considered laboratory hoods as a special application outside the limits of his work. This is unfortunate in view of the importance of this topic in both amdemic and industrial circles. The book is thus of little interest to the large number of persons who really are novices in this busine~-for exrtmole., the buildine committee and the local architect who gets the laboratory design job. It would seem to be highly advisable for the author, in his third edition, to diaouss
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