Elementary Chemical Arithmetic. By Sydney Lupton, M.A. (Macmillan and Co.)—The
eleven hundred problems stated and solved in this volume are prefaced by several chapters, in which the numeri- cal elements of chemical and physical properties are explained. A few pages are devoted to logarithms, and to the reduction of experi- mental results. Then follow the problems proper and their answers, while the volume is completed by a series of tables. The employ- ment of such a work as this, not merely in chemical classes, but in the teaching of school arithmetic, would be very useful in ousting the absurd and aimless questions too often set in examinations. The problems here given cover a wider range, and are moat judi- ciously selected ; moreover, they are very exact in form and precise in statement, avoiding old errors of expression. Something, perhaps, might have been given bearing on crystallogy and on the measure- ment of surfaces and angles. Something more might have been said about determinations of specific gravity, and the corrections neces- sary to secure exactness of result. We have noted very few mistakes in the volume, and nothing of real importance.
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