11. Protectors of Health and Beauty. 12. Electrochemistry and the Nation. As the author states in the preface.. . "this volume touches but briefly the high spots.. . ." Starting with the economic aspects of water power in relation to electrical energy, the author weaves through a panorama of discovery, invention, and progress in the various branches of electrochemical achievement. Hardly any topic is left unmentioned and on the whole the volume is remarkably complete. One naturally regrets the omission or bare mention of such seeminelv ... imnortant subiects as ohotoelectricitv. ~~~, v a r u l m tul,rs, rlrcrrical "nring" of niirogctl, and Currrcll precipitation in l a w r of orher topics which are disruqcrd in derail. Thr la-[ rhaprrr i i drvurr.d to rhr. imporrnnce of ~~~~~~~~~~~~try AN INTRODUCTION TO THE PRACTICE OR ORGANIC CHEMISTRY IN in the United States. THE LABORATORY. Homer Adkins, Professor of Chemistry, Those who have read De la Rive's clear explanation of local and S. M . McEluain, Associate Professor of Chemistry, action (written in 1830) may wonder why the author attributes both of The University of Wisconsin. Second edition. Mc- the electrochemical theory of corrosion to "the director of the Graw-Hill Book Co., Inc., New York City, 1933. x 224 pp. House of Magic" as is stated on page 24. 8 Figs. 14 X 20.5 em. $2.25. The chapter an "What Price Purity" is truly a miniature For its size, the volume contains in a very compact form an classic. The illustrations are up-to-date and interesting, while the tables are excellent from the statistical point of view and unusual amount of information. The experimental work and accompanying directions are so contain a wealth of information. The very intimate treatment arranged that the text can he used equally well for a short, one- ' of the subject matter is excellent and many chuckles are in store far the reader, as is instanced on page 95, where the author semester course or for a longer year period. Pages 6 to 82 are taken up with a list of forty-eight representa- describes the discovery of calcium carbide. To the electrochemist or advanced student, familiar with the tive preparations with many test-tube experiments, suitable ,,. to the in whole or in part for the shorter course. The directions are subiect matter. the book is bound t o Drove refreshinc: adequate and are supplemented with well-chosen questions on hyman it will hc instructive; and to rvcryotw if s h ~ u l dprove inrcrrsring and one should feel richer after having reall it l
