HISTORICAL ATLAS. By William Shepherd. New York: Henry Holt&Co., 1911. 8vo.; 216' maps, 94 pages of text. Price, $2.50. ThiK is one of the most valuable atlases tbat has core to tbe reviewer'S table in a very long time. In the first place, the data for the maps have been corpUed in a most scholarly way by an expert, also with the advice and assistance of a splendid list of geographers and historians. In the second place, the maps, which, by the way, were printed in Gernlany, are magnificent examples of the cartographer's art. The combination of colors which are apt to be so very crude in atlases of American origin are toned down and admirably contrasted. It is very difficult to call attention to any salient feature of this book, as it is of uniform excellence. Among the very intClesting maps, however, are those showing tbe various Routes of the Crusaders ; the Ecclosiastical Maps of gurope ; the very interesting map showing the rontes of the Medirval Commerce; the Seats of the Medhaeval universities ; the Medirval Commerce of Asia; Plan of a lIedirval manor; tbe Age of Discovery ; the Principal Seats of War in Europe in all Centuries ; the Growth of Russia; Napoleon's Campaigns; the Unification of Germany ; tho Balkan Peninsula; the Commonwealth of Australia; the Partition of Africa; the Distribution of the Principal European Languages; the Colonies, Dependencies, and Trade Routes; Localities in Western gurope Connected with American History; Localities in gngland Connected with American History ; the Indians in the United States; the New England Colonies ; Campaigns in the American Revolution; 'erritorial Expansion of the Gnitcd States ; OrganizatIOn of Terr1tories; Slavery and Emancipation in the Fnitcd States; Westward Development of the United States, and lastly, the Panama Canal. It would almost be ungracious to offer any criticism of this splendid work, but it is sug-gcsted that the 208th map, showing the seat of the Civil War, might have .been made a two-page map to greater advantage, as a map of this kind is very much needed. To MaTHER. By Marjorie Benton Cooke.! Chicago: Forbes&Co., 1911. Price, 50 cents. It is seldom that one can whole-heartedly in-dorse present·day poetry such as this. The mother-theme, too, must be well handled not to be made ridiculous by distortion of values on the one hand, or by a cbeap verbosity un-suited to reter on the other. 'his being so, we take the greater pleasure in acknowledging the sweet dignity and the repressed yet strong appeal of the author's lines. :ven in ending her sonnets with the rbyming couplet-a fo"m now frowned upon-we believe she has scI pcted the mode most effective with such a theme and treatment. For all mothers, and for all :hlldren of mothers, this little gift book must strike a true and uplifting chord. THg HINDU-ARABIC NUlERALS. By David Eugene Smith and Louis Charles Kar-pinski. Boston: Ginn&Co., 1911. 8vo.; 160 pp. Price, $1.25. Of all the numerous published monographs on our system of numerals, none can be said to present I complete history of their origin, adoption, and adaptation. ' 'he libraries of gurope and America have been searched in pursuit of the information embodied in “The Hindu-Arabic Numerals,” and all available evidence has been carefully weighed and passed upon. The result is a reliable and fairly comprehensive review of the subject, from what is known of the origin of the characters, the earlier use of the place value, and the intro-duction of the zero, to the development of the system by the Arabs and its spread over tbe face of guropc. When we consider that this system has been in general use for but four centuries, and when we realize the amazing clumsinesK of the Homan characters which it displaced, we must approach its history with an enhanced respect and with an increased gratitude for what the system has done for our civilization. TEXT-BOOK OF MECHANICS. By Louis A. Martin, Jr. Vol. III. Mechanics of Materials. New York: John Wiley&Sons, 1911. 12mo.; 229 pp. Price, $1.50 net. rrh( author gives us a text-book of lnechanics, designed for colleges and technical schools, in four volumes. “Statics” and “Kinematics and Kinetics” have preceded tbis, while “Applied Mechanics” is in preparation. '[he airn of tlw series is such an arrangement and Hesentation of its subjects as will encourage the student to reason as well as to memorize --to prove for himself, iwstead of simply aeccpting stat{UHents and solutions. The variOU8 stresses and strains are classified and explained in this third volume, and diagrammatic sketches and notations lead naturaJly up to the appended exercises lnd examples. The answers to the interpolated problems are given together at the baek of the book, and there are betwepn forty and fifty review prob-ems given with tl"' oljed of rcireshing the memory and filing principles indelibly in the mind.