RECENT ROOKS MODERN-LIFE C H E M ~ S ~ RFrank Y. 0. Kruh and Robert H. Carleton, Summit High Schwl, Summit, New Jersey, and Royd F. Carpenter. Stivers High School. Dayton, Ohio. Edited by W.R . Teeters. Supervisor of Physical and Biological Sciences, St. Louis Public Schools. Second Edition. J. B. Lippincott Ca., Chicago, 1941. xxv 774 pp. 374 figs. 13.8 X 20 cm. $1.80. The outside impression of this book is not particularly favorable. The thickness of the hook is not likely t o appeal to the student. The color scheme chosen far the binding seems rather delicate for a h w k designed to stand the hard usage t o which a chemistry text will probably he put. The design on the cover does not strike the reviewer as particularly convincing sales talk for a chemistry hook. Inside, the book is more attractive. The type is large, clear, and easy t o read, perhaps on account of good contrast between the heavy ink and the white paper. The illustrations are numerous and excellent. The equations and tabular matter are well set up. Bold-face type is judiciously used and not overdone. A text with the same title and by the same authors was puhlished in 1937. The reviewer has hunted in vain for same statement in the hook under review to show whether it is a new edition or an entirely new hook. Because of the exact paralleling of the units by title and by page it Looks as if the new hook is simply a reprinting of the former in a new dress, and with the addition of a new chapter a t the end. A review of the 1937 edition appeared in J. CEEM. E ~ u c . , 14, 449-50 (1937); with this the present writer is in essential accord and t o i t the reader is referred. I t therefore seems wise simply to point out some differences noted. "The chemist's work is never done," the opening sentence of the new and final chapter entitled "Chemistry Marches On," is the keynote of 40 pages of most interesting reading on (1) recent chemical contributions to health, safety, home, conservation, and national security, (2) recent developments in plastics and synthetics, and (3) a brief glimpse into the future of chemistry. This chapter may serve as background and inspiration to the teacher rather than as a lesson assignment t o the pupils, but in either case 12 pages of up-to-the-minute illustrations enhance its value greatly. The reviewer cannot close without registering his disappointment that the authors did not adopt the recommendations of the Committee on Labels of the Division of Chemical Education in regard t o the more logical way to indicate the number of molecules of water of hydration in hydrated salts. Had they done so they would have avoided that awkward equation for action of beat on gypsum (page 480) that has hothered so many author-and students tw. WILHELMSEOERBLOM
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E m n m r e ~ r IN s GENERAL CHEMISTRY.H.W. Stone, Associate Professor of Chemistry, M. S . Dunn, Associate Professor of Chemistry, and J, D. McCullou~h,Instructor in Chemistry, University of California a t Los Augeles. Third Edition. McGraw-Hill Book Co., Inc., New York City, 1941. viii 4277 pp. 29 figs. 21 X 28cm. $1.60. The third edition of this well-known laboratory manual is, according t o the authors, the result of seventeen years of development, and is intended for use with any standard textbook. The authors have purposely omitted many conventional exercises which duplicate lecture demonstrations ordinarily used, and have substituted others involving measurable results and requiring interpretation by the student. As a result, in general the exercises involve chemical principles, preparations, and qualitative or quantitative determinations.
Of these exercises, the authors regard those illustrating chemical principles as particularly suited to students majoring in chemistry or allied sciences, and those involving applications of these principles as particularly suitable for students with cultural aims. Of the forty-two assignments, twenty-four involve measurement significantly and four a simple qualitative determination. For each assienment. data and Drohlem sheets are in" . minted . cluded, which can bc removed, handed in. and Gled in a loosel a d Lindrr. The data shccts arc designcd to incrruct the student in systematic observation and recording, and the problem sheets to eliminate the necessity far essay type reports, without reducing the logical thinking done by the student. I n this new edition, the assignments on chemical applications are largely unaltered, new experiments and changes appearing mainly in exercises involving chemical principles. The manual is divided into seven parts, as follows: Part I. General Experiments--Gas Burner, Glass Working, Properties of Substances, Melting Point, Density, Temperature and Change of Physical State, Effect of Concentration. Surface Catalyst, and Temperature on Rate of Reaction. Part 11. Atomic Theory. Weight Relations-Water in a Hydrate, Percentage Composition, Combining Ratio, Analysis and Formula Determination. Part 111. Atomic Theory. Volume RelationsTemperature, Pressure, and Volume Relations of Gases, Gram Molecular Volume, Gram Molecular Weight. Molecular Weight of an Unknown Gas, Equivalent Weight. Part IV. Solutions-Inffuence of Temperature on Solubility, Fractional Crystallization, Ionization, Acids, Bases, and Salts, Molar and Normal Concentrations. Equivalent Weight of an Unknown Acid. Reversible Reactions and Equilibrium. Indicators, Ionization Constant. Part V. Oxidation and Reduction-Electromotive Series, Standardization of Potassium Permanganate Solution, Equivalent Weight of an Unknown Reducing Agent, Chemistry of Iron, Photochemistry. Part VI. Chemical Principles and Their Practical Applications-Grouping of Elements According t o Properties, Gas Analysis, Fractional Distillation (Petroleum Products), Preparation of Ethyl Alcohol. Percentage of Organic Acids in Vinegar. Softening Hard Water. Qualitative Analysis of Baking Powder, Percentage of Carbon Dioxide in Baking Powder, Preparation of Potassium Alum from Soil, Qualitative Analysis of an Unlmawn, Preparation of a Selected Inorganic Substance, a Problem of Chemical Control or Manufacture. Part VII. Appendix-Reference Literature, Reagents and Apparatus, Calculations, Graphic Representation, Laboratory Operations, First Aid, Tables of Data. The manual is sound and well arranged, directions are d e a r and complete, the figures are excellent, and the whole is printed clearly on good paper. Any student who comcientiously completes the work outlined in this manual should have an enviable foundation for suhsequent courses in chemistry. L o r n n o ~SMITH STATB U N I V B R D ~ NOR IOWA IOWA CITI, low* CHEMICALARITUMETIC. Saul B. Armson, Professor of Inorganic Chemistry. University of Cincinnati. Second Edition. John Wiley and Sons, Inc., New Yark City. 1941. ix 130 pp. 9 figs. 14 X 21.5 cm. 51.50. The second edition, as stated in the preface, contains approximately fifty per cent more problems than the first edition (1931). New types of exercises, with a "simpler approach in many cases." are presented. A large part of the original edition has been rewritten. The contents of the book, as indicated by the eight chapter headings, are as follows: Introduction; Units and Their Conversion Factors; Atomic and Molecular Weights; Gas Laws; Weight
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