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Recent Books
Chemistry for Today. WILLIAM McEDWARDS HENPEERSON and WILLIAM DER~ON, Professors of Chemistry a t Ohio State University, and G w ~ o s WINEGARFOWLER,Head of Science Department, Central High School, Syracuse, New York. First edition. Ginn and Co., Boston, Mass., 1930. xi 555 pp.; appendixes and index, 35 pp. 330 illustmtions including portraits of famous chemists, 2 color plates. 13 X 19.5 cm. $1.80.
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That the text is modern is shown by the inclusion of same very recent material such as: the Vorce cell for preparing chlorine, the use of vanadium oxides in the Selden process for preparing sulfuric add, carboloy, the newer steels, and various other items. The LeBlauc process is omitted since it is not used in this country. The diilacement series is deferred until Chapter 18 but the reviewer feels that it might well have been introduced much earlier. ,The solution of problems is carefully explained in the text but the reviewer failed to find anything like an adequate number of problems for pupils to work on. Doubtless the authors contemplated the use of a problem book in connection with the text. The treatment of the structure of the atom is good, the solar-system method being used, hut it is stated in the preface that this is simply a choice of what seems the simplest for teaching elementary students. The Lewis-Lanpmuir octet theory is not given. The illustrations are good but in the line drawings the reviewer wonders why the artists who prepare such drawings for all of our texts persist in drawing a line across the tops of flasks, bottles. thistle tubes, etc., so that they look like closed vessels. A number of valuable appendixes and a satisfactory index close the volume which is one that all teachers will he interested to examine and to consider in making their choice of text for the coming year. C. H. STONE E ~ o u s nHIORSCBOOL
This book will be welcomed as an interesting and valuable addition to the list of chemistry texts for preparatory schools. The h t impressions from it are pleasing; good paper and substantial binding; clear type and illustrations; lies readily open in the hand when opened a t any page. The volume is considerably larger than its predecessors by the first two of the above authors but it is explained in the preface that this increase in size is due not so much to the inclusion of new material as t o the more complete and fuller treatment of the many topics on which experience has shown that an amplified treatment is necessary. After an introductory chapter dealing with the work of the alchemists, the following forty-sixchapters deal with the subject in about the usual order. The body of the tent is printed uniformly in one size of type, but the summaries and the legends attached to the illustrations are in smaller type. Instead of giving the usual form of swunary which is simply a condensed statement of the matter of the text, the authors have mesented a BOSTON. WSB~S -~ ,M - A S S A C~summary in the form of questions which send the student to the text for the an- General Chemistry for Colleges. B. swers. Following the summary a t the Sanra H o ~ m s Professor , of Inorganic end of each chapter is a series of thought Chemistry in the University of Illinois. questions and after these there is addiD. C. Heath and Company, New York tional material for honor students, a novel City, 1930. x f 757 pp. 243 figures. feature. 14 X 21.5 an. S.72. 2526 ~~
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