Vor. 3. No. 11
RECENT
The baok is excellent for college students in organic preparations and should also be of S e ~ c eto graduate students. The compounds chosen cover a wide range of classes and of methods. The directions are accurate and clear and represent modern methods.
E. EDIKET Rm Physics. M. H. KESSLER,B.S. Globe Book Company, New Ymk. 1921. v 103 xvii pp., 83 figures, 15 X 22.5 cm. $0.67.
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The author bas compiled a manual to be used in preparation for examinations. Seven points have been emphasized: First, laws, principles, and definitions; second, typical problems; third, important diagrams; fourth, college examination questions; fifth, outlines of important experiments; sixth, an appendix containing important formulas with more college questions and answers; seventh, metric equivalents and important physical constants. The baok is prepared for "two distinct purposes." First. "as a companion book to a standard text." second, "as a review before examinations." There are eighteen chapters in the outline: Introduction; molecular motion; mechanics of liquids; mechanics of gases; motion and acceleration; force and equilibrium; gravitation and gravity-pendulum; work and energy; machines; heat; sound; light; magnetism; static electricity; current electricity; Ohm's law and its applications; effectof electric current; induced currents and their applications. Each topic in the Review is in bold type, followed by a brief explanation. A series of related problems are added a t the end of each chapter. Each type of problem is dearly explained and a t least one example of each type is solved in detail. Answers to all numerical problems appear in the back of the book. The text fulfils satisfactorily the two purposes for which it is written. It is a type of hook which should be in great demand by tutoring schools and in college
preparatory murses. It is in no measure a text-book. LESLIE0. JOHNSON Globe Laboratory Sheets. WILLARDB. NELSON. Globe Book Company, New 44 pp.. reference York, 1926. vi tables, 10figures. 19 X 26.5 cm. $0.67.
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Mr. Nelson has combined a set of laboratory report sheets in a bound manual. It is prefaced by a title page to be fded in by the pupil and a certificate to be completed by the instructor. The student is given a short set of concise directions on the use of the book. Excellent sample diagrams for each laboratory science fallow the preface. The actual working sheets are preceded by two pages for indexing 40 experiments. The book is arranged so that two pages are available for each enperiment. Lines are rnled as an aid to neatness. The lefthand page contains four topics in addition to the heading: Object of Experiment; Apparatus and Materials; Procedure; Ohservations. The last two items are arranged so that the observations may he made opposite the points in the procedure. The top third of the right-hand page is blank for diagrams. the middle third is for computations, and the lower third is lined for conclusions and observations. A series of tables is given including formulas; conversion tables; physical constants; chemical elements with their symbols, valences, and atomic weights; and a solubility table. Four pages of graph paper complete the manual. The book is valuable for teachers who demand a "form" repart. The paper is of fair quality, taking the ink easily. LESLIE0. JOHNSON Chemistry in the World's Work. HARRISON E. Horn. D. Van Nostrand Co.. New York, 1926. vii 244 pp. 14.5 X 21 cm. $3.00, net.
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As stated in the preface, "the object of this work is to emphasize in language easily understood by those not technically trained, the part which chemistry has
