mimetry, manometry, densimetry, and others? Recent years have brought many advances in such methods.esneciallvfor the . determination oi trace amounts of constitucnts. Emphasis in the preface on physicol meanurements leads one to wonder what other kind of measurement is possible. This new volume seems to be s worthy addition to the treatise. Again the set is recommended for a general persppctive of the hasis and spplicnhility of the tpchniques covered.
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hl. G . MELLON Ponone U m ~ ~ n s m r L * P * I E ~ E INDI*N* ,
TRACE ELEMENTS IN HUMAN AND ANIMAL NUTRITION
E. I. Underwood, Institute of Agriculture, University of Western Australia. Academic Press, Inc., New York, 1956. 430 pp. 29 figs. 47 tables. 1 6 X 23.5 cm. $9.50 THIS book was written by an out. standing authority and worker in the field of trace element research and is the first hook to be devoted entirely to the significance of trace elements in the nutrition of
man and domestic animals. The author has devoted the first chapter to an intr* duction of the subject and an entire chapter t o each of the following trace elements: iron, copper, molybdenum, cohalt, nickel, zinc, manganese, iodine, fluorine, and selenium. Chapter 12 covers eight elements: aluminum, arsenic, barium, boron, bromine, silicon, strontium, and vanadium. The last chapter is s. summary of soil-plant-animal interrelationships. In each of the ten chapters devoted to a single element the author has considered the nutritionally important aspects as well as the toxicity of each of the ten elements. The author has included a historical treatment of the work which has been done on each of the elemunts so that the student may Lymalise the stepbystep development of knowledge regarding the nutritional implication of these trace elements. He is also s~tceessiul in his efforts to review the important original articles and has made reference to many of the reviews whirh have been written on each of the elements whieh the book is concerned. "Traoe Elements in Human and Animal Nutrition" ha8 been written especially lor those interested in the nubrition field, hut it should also he a welcome addition to the reference shelf of all scientists interested in the biological significance of theseelernents. A . L. MOXON n~~ STATION 0 x 1 0 A a r n c u ~ ~ aEXPERIMENT W o o s ~ m Omo .
BIOLOGICAL TREATMENT OF SEWAGE AND INDUSTRIAL WASTES. VOLUME I: AEROBIC OXIDATION Edited by Brother Joseph McCabe, F.S.C., and W. W. Eckenfelder, lr., Manhattan College. Reinhold Publishing Corp., New Yo*, 1956. vii 393 pp. Many figs. and tables. 15 X 23 cm. $10.
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"TXE present hook comprises tho proceedings of a conference on biological waste treabmcnt, held a t Manhattan College in April, 19.55, a t whieh Limo leaders in this field delivered a series of papers reviewing advances and presenting new information!' Thirty-three papers are presented and are arranged into four parts: Part I , Theory and Mechanism of Biological Waste Treatment (10 papers), Part 11, Aeration-Theory and Design (10 papers), Part 111, Sewage Treatment (7 papem), and Part IV, Industrial Waste Treatment (6 papers). Each part is roncluded with a lengthy list of references. A t tho end of Part IV appear an author index and a subject index. As might he expected there is not a clear continuity between successive papers, and each must he considered as a separate ent,ity. A more adequate subject index would have helped to alleviate this lack of continuity. The papers artre written in a scholarly iashion. Photographs, tables. and figures are very legible. The brief amount oi chemistry included is col.wet (Continued on page A.?g4)
JOURNAL OF CHEMICAL EDUCATION
