SCIENCE. 



[Vol. XIII. No. 319 



tubes, pipes, canals, and rivers. The measurement of water-power, 

 the dynamic pressure of flowing water, hydraulic motors, and 

 naval hydro-mechanics are treated in separate chapters, the latter 

 subjects being given less space than their importance would seem 

 to warrant. The book is amply illustrated. 



A General Formula for the Uniform Flow of Water hi Rivers 

 and other Channels. By E. Ganguillet and W. R. KUT- 

 TER. Tr., with additions, by Rudolph Hering and John C. 

 Trautwine, Jun. New York, Wiley ; London, E. and F. N. 

 Spon. 8°. I4. 



To all engaged in the study of hydraulic problems, as well as to 

 engineers who deal with the flow of water, this book will be of 

 great service. It is the first published translation of the authors' 

 chief work on the subject ; though unauthorized translations from 

 articles in German periodicals on this subject, by the same authors, 

 were published in London several years ago. The first part of the 

 work is devoted mainly to historical matter, and to a review of 

 present knowledge of the laws governing the flow of water. A 

 treatise on the new formula, showing its close agreement with a 

 large number of experimental results obtained under differing con- 

 ditions, makes up the second part. A supplement contains a more 

 direct method of deriving the formula, for the benefit of those who 

 desire mathematical brevity. A second general formula is also 

 sketched, though not made prominent, as the first one is consid- 

 ered preferable. 



The translators call attention to the fact that the authors have 

 been erroneously regarded as holding their formula to be scientifi- 

 cally perfect, and covering both possible and impossible conditions 

 of flow. They disclaim for them any such intention, insisting, that, 

 as the formula is purely and essentially empirical, it must not be 

 expected to apply to cases beyond the range of the data from 

 which it has been derived. Its application is limited to cases where 

 the slope of the water-surface can be ascertained with a degree of 

 accuracy sufficient for the given case. 



Nine appendices and five tables for practical use, which form 

 part of the volume, contain much additional matter of value to 

 those interested in the subject. In Appendices I. to IV. are given 

 extracts from the works of Mr. Kutter upon the formula. Ap- 

 pendix V. contains directions for constructing the diagram used for 

 a graphical solution of the formula. Appendix VI. is devoted to 

 Kutter's modification of Bazin's general formula, useful for special 

 purposes because of its simplicity. In Appendix VII. are given a 

 number of formulse and data concerning the relation between the 

 mean and surface velocities in streams ; the views of a number of 

 investigators on velocities beyond which a scouring of the bed 

 takes place in channels formed of different materials, are given in 

 Appendix VIII. ; and an account of Harlacher's method of ascer- 

 taining the discharge of rivers, in Appendix IX. 



In Table I. are collected the hydraulic elements of over 1,200 

 gaugings, made in 300 different channels and pipes, under vary- 

 ing conditions of mean hydraulic depth and slope. In the original 

 work the corresponding table is confined to 81 gaugings ; so that 

 this table is virtually the work of the translators, who believe it to 

 be the most complete and comprehensive one yet published. The 

 other tables contain the computed values of different elements of 

 the formula, and the conversion of units of measure. An immense 

 amount of labor has been bestowed upon this work by translators 

 as well as authors. 



AMONG THE PUBLISHERS. 



The delay in the publication of Sir Monier Williams's book on 

 Buddhism has been caused by difficulties which have arisen in con- 

 nection with the illustrations. A certain number of copies will be 

 in Mr. Murray's hands at once. The work will be published in 

 America by Macmillan & Co. 



— Lee & Shepard have in press Samuel Adams Drake's " Decis- 

 ive Events in American History, Burgoyne's Invasion of 1777, with 

 an Outline Sketch of the American Invasion of Canada, 1775-76." 

 It will be an admirable historic narrative, intended to be used as a 

 text-book, or as a supplementary reader in schools, as well as 

 for general reading. A valuable book, arranged especiallv for 



young people, yet by no means unsuited to any time of life, en- 

 titled " Every-Day Business : Notes on its Practical Details," by 

 M. S. Emery, will be published soon by this house. It gives care- 

 ful instruction regarding many matters closely connected with 

 business transactions. The book will be a valuable companion for 

 young people, and its pages will contain instructions on business 

 subjects, being designed for ready reference, and also as a text- 

 book for use in schools. 



— Macmillan & Co. will publish shortly " Natural Inheritance," 

 by Francis Galton ; a second series of Sir John Lubbock's " Pleas- 

 ures of Life ; " and A. R. Wallace's work on Darwinism. 



— Harper & Brothers will publish this month the second volume 

 of W. P. Frith's "Autobiography and Reminiscences," and a new 

 and revised edition of the " Manual of Historical Literature," by 

 President C. K. Adams of Cornell. 



— Wolcott & West, Syracuse, N.Y., will shortly publish " Theo- 

 ries of Knowledge," by Rev. W. D. Wilson, D.D., Professor Emeri- 

 tus in Cornell University. 



— D. C. Heath & Co. have just ready, in their series of Guides, 

 for Science Teaching, " Hints for Teachers of Physiology," by Dr^ 

 Henry P. Bowditch of the Harvard Medical School. It will show 

 how a teacher may supplement his text-book instruction by simple 

 observations and by experiments on living bodies or on organic 

 material. 



— Dodd, Mead, & Co. have in preparation the letters and diaries, 

 of Emin Pacha, which, besides containing matter of interest as 

 biography, relate largely to the author's scientific investigations. 

 The volume has for an introduction a biographical sketch of Emin, 

 with two portraits, one of them recent. They have also in press 

 Bayard Tuckerman's biography of Lafayette, to be issued in two 

 volumes. 



— T. Y. Crowell & Co., in connection with the announcement of 

 a cheaper cloth and a paper edition of Tolstoi's great work, "Anna 

 Karenina," translated by Nathan Haskell Dole, state that Mr. 

 Dole's translations have been received with great favor by the Tol- 

 stoi family. In a recent letter to Mr. Dole, the Countess Tatiana 

 Lyovna Tolstoi says, " My father has read yotir translations, and is 

 much pleased with them. They are to his mind very carefully and 

 accurately done." 



— Ulric Blickensderfer, Chicago, 111., has just issued " Black- 

 stone's Elements of Law, etc.," with analytical charts, tables, and 

 legal definitions, arranged and displayed by a systematic and at- 

 tractive method. Mr. Blickensderfer is an attorney-at-law, and 

 claims that these charts will be found time-saving helps to his col- 

 leagues. Sample copies may be had on application. He also has 

 published a chart of the " Historical and Genealogical Descent of 

 the Crown of England," which by an ingenious arrangement of 

 types brings the history of EngJand on one side of a sheet of paper 

 six inches wide and eighteen inches long, which folds up like an 

 ordinary legal document. The succession covers from A.D, 827 

 to the ascent of Queen Victoria in 1837. 



— The article on " Climbing Mount St. Elias," to appear in 

 Scribner^s for April, is the work of an American member of the 

 Alpine Club, Mr. William Williams, who, with two English fellow- 

 members, succeeded, during the summer of 1888, in reaching the 

 highest point ever attained on that mountain, — about 11,400 feet. 

 Charles Francis Adams, president of the Union Pacific, will con- 

 tribute a railroad article to the number, on the " Prevention of 

 Strikes." He proposes apian which, if carried out, would be almost 

 a revolution in the relations of railroad employers and employees. 

 William. H. Rideing, who made a careful inspection of the great 

 Clyde ship-yards during the past summer, will give a description 

 of them, showing the various stages in " The Building of an Ocean 

 Greyhound." 



— Ticknor & Co.'s March books include " Dragon's Teeth," 

 translated from the Portuguese of Ega de Queiros, by Mrs. Mary 

 J. Serrano ; and in their Paper Series, " Forced Acquaintances " 

 (No. 53), by Edith Robinson, and " Under Green Apple Boughs " 

 (No. 54), by Helen Campbell. 



