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HAND RAILING SIMPLIFIED. Sectarian System by an Architect. Edited and revised by Fred T. Hodgson. 16mo. Pp. 53. Price 1. This volume describes a novel method of finding jurves, twiste, wreaths, ramps and cuts for hand railing aver an elliptical staii. This method of finding the lines and angles for stair railings does away to a great xtent with the mystifying lines so necessary to build a liand rail by any of the old systems. A brief study and a little practice will enable the workman to understand the whole system. THE COMPOUND ENGINE. By F. R. Low. New York : Power Publishing Company. 1900. 13mo., pamphlet. Price 50 cents. The editor of Power has done a wise thing in issuing this little monograph on compound engines. It is a aubject which neressitates great clearness of expression and which must be illustrated by very clear diagrams, rhis result has been obtained admirably in the present book, which is illustrated with many diagrams. We commend it to all those who wish to get a thorough understanding of the compound engine. THE CALCULATIONS OF ANALYTICAL CHEMISTRY. By Edmund H. Miller, Ph.D. New York : The Macmillan Company. 1900. 8vo. Pp. 183. Price 1.50. Chemical calculations are fascinating, and there is little :eal difficulty in working any problem if the rules are well understood. The volume before us is an admirable text-book, in which new methods are described. There ire many examples given, all of which can be solved by arithmetic or algebra. The book is rather more exten-aive than any we remembsr to have seen.
