JANUARY, 1947
51
ber, hut smoked sheet. In discussing methods of latex concentration, no reference ir made to rvapumtion (Revertex proress) which h hased on thc additim of pn,t~etivecolloids and therefore is entitled at least to he listed in a text suooosedlv devoted to .. colloids. The discussion of the nature of rubber-like elasticity (pp. 86-8) needs revision. Racking of rubber resulting in loss of elasticity is not even mentioned. In montmorillonite (p. 111) it is not the silicon which is reolaced hv aluminum, but the latter by an ion of lower valency, e. g., magnesium. Finally. .. I should like to comment on the bibliography. The boob recommended by the author for those who wish to make a fuller study cannot he strictly classified as colloid chemical texb books. Those listed as elementary are either outdated or not specific colloid ohemieal texts, and the book written by the reviewer is certainly not zn advanced, but an elementary, text used in many first term courses in colleges in the United States.
MEN AT WORK Stuart Chase, in collaboration with Marion Tyler Chose. Harcourt, Brace and Company, New York, 1945. 146 pp. $2.00.
OP Stuart Chase, from acquaintance with his "TragREADERS edy of Waste,'' "Your Money's Worth," "Men and Machines," "Economy of Abundance," and other titles, expect his books to relate economics to human welfare. The volume under review is not a disappointment to that expectation. The reviewer first read "Men at Work" seeking an 'answer to the question, "Why do men work?" He found it in chapter two and that answer was, "not primarily for money." him with the A further oerusal of the book, however.. imoressed . pertinence of parts of it to the work of the teacher or supervisor in our public schools. Even the college he thought. - orofessor, . might read those parts with profit. The chapters on "Educating the Boss," "Show How," and ERNST A. HAUSER It ~ & i e rand Better" illitrate in a splendid way the basic "Do MASSACBDBETTS INBTITUT. O I TBCBNOLOB~. psychology of good teaching unencumbered by the vocabulary of C * ~ e n m o s .M n s s h c a a s a ~ ~ s the professional pedagogue. All persons concerned with teacher training should be required to read and reread the chapter on METHODS OF ANALYSIS (OFFIC~AL AND TENTA- "Educating the Boss." Every teacher in service would profit W E ) OF THE ASSOCIATION OF OFFICIAL AGRI- by a trial of some of the pithy suggestions in regard to "job inCULTURAL CHEMISTS struction" in the ohapter on " S h o ~How," and many directors of Edited by Henry A. Lepper, Chairman of the Editorial Board. instructional laboratories with their aver-population of G. 1,'s and revised by the following Committee on Editing Methods oi will find the chapter on "To DO It Easier and Better" pregnant Analysis: H.I. Fisher (Chairman), L. E. Warren, I. W. Sale, with suggestions of way8 of eliminating waste time, supplies, and W.H. Ross, W. F. Reindollar, and Marion Lapp Otis. Sixth human energy. Two other chapters, while not so speoifically pointed to the edition. Association of Official Agricultural Chemists, Washor laboratory, are, however, helpful to a fuller appreclassroom ington, D. C., 1945. xii 932 pp. 76 figs. 15.5 X 23 cm. ciation of the more general background of our school job. They $6.25. are entitled: "Why Men Work" and "Teams, Groups and INACCORDANCE with its custom of revising the "Official and Gangs." Tentative Methods of Analysis" every five years, the Revision The chapters on "Bigger Pie" (labor-management committees), Committee has now published this sixth edition which incorpo- "Same Bureaucrats Are Human," and "What TVA Means" rates the ohmges in methods and the additions adopted by the should have high priority for reading by all voting citiaens. Association at the 59th annual meetine: held in October. 1944. It is unorthodox to turn to an economic journ%list for help for This text has long been recognized as-the "Book of ~ e t h o d s " the teaching profession, but there are times when the "outsider" is actually more objective and therefore more helpful than the for those actively. enpa~ed - . in the analysis and examination of agricultural or related products and of many other commodities, "within-th-fold" educator. B. CLIFFORD HENDRICKS some of which are only slightly related to agricultural pursuits. Umvenamr or Naan*sa* In the 43 chapters devoted to analytical procedures we find in LINCOLN. N~BRASKI addition to such expected subjects as soils, fertilizers, insecticides, leathers, beverages, eereds, d,airy products, meat products, PHYSICAL METHODS OF ORGANIC CHEMISTRY waters, drugs, and the like, suoh unexpected subjects included as oosmetics, enzymes, dessert preparations, baking powders and Volume I. Arnold Weissberger, Eastman KodaL Company. chemicals, 6sh and marine products, vitamins, radioactivity, and Interscience Publishers, Inc., New York, 1945. vii 736 pp. others. The chapters on "Extraneous Materidls in Foods and I$ X 23 om. $8.50. Drugs," "Gelatin, Dessert Preparations, and Mixes," and "CosUNDERTHE editorship of Arnold Weissberger, this volume is a metics" are new. The chaoter on vitamins has been meatlv - . exscientists from the United .. pmded and now includes in addition to biologioal asmy methods, collaboration of 27 other physical I t is a treatise on physical methods freStates and Canada. spectrophotometric, fluorometric, and chromatographic methods. quently used by the orkrtnic chemist on the graduate research In this revision changes have been introduced into nearly all of It is desirable to have such a volume because there is no level. the chapters and the number of pmes increased by ahout 175. secondary source for this type of information. Most chemists ~ s e k w i lwelcome l the chtLngefr& Roman numerals to Arabic previously have been forced to search periodicals for much of the numbers for chapter identification, and a decimal system of numbering the sections of each chapter. Each cross reference to information necessary to attack an organic chemical problem by an unfamiliar physical method. It was the specific object of the other parts of the book is now identified by a complete chaptereditor "to relieve the chemist of much of the burden of such a section decimal number. The book is well printed and appears adequately hound. This search." In this the editor has been successful, to say the least. revised text will be wanted far laboratory use and reference by Graduate students are likely to welcome this book enthusiall those engaged in the field of agricultural chemistry and its re- astically. The following chnpter headings will suggest the scope of the lated fields. first volume: Determination of ,Melting and Freezing TemperaW. W. RUSEELL tures, Boiling Temperatures, Density, Solubility, Viscosity, SurBmvm U ~ ~ v r ; n m r fnco Tension. Pxrachor. Properties of Monolayers and Duplex P a o v ~ o m o Raoon ~, ISLAN~ ~
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