SCIENCE 



New Series. 

 "Vol. IV. No. 96. 



Fkiday, October 30, 1896. 



Single Copies, 15 cts. 

 Annual Subscription, $5.00. 



THE fflACMILLAN CO MPANY'S NEW PUBLICATIONS. 



THE HISTORY OF MANKIND. 



By Professor Feiedeich Eatzel. Translated from the second German edition by A. J. Butlee, M. A. With 

 Introduction by E. B. Tyloe, D.C.L., F.R.S. With 9 Colored Plates, Maps, and upward of 400 Illus- 

 trations. Imperial 8vo, cloth. Vol. I., $4.00. To be completed in 3 vols. Vols. II. and III. in preparation. 



Professor Ratzel's Volkerkunde has for some years enjoyed a wide popularity in Germany. Combining: scientific accu- 

 racy with a due regard to the interests of those who read mainly for entertainment, it is undoubtedly the best general his- 

 tory of the development of mankind which has yet appeared. The present translation has the advantage of being made 

 from the second edition, which appeared, carefully revised and enlarged, so lately as the autumn of 1894, and may therefore 

 be regarded as embodying the results of the most recent researches. Nor must it be forgotten that if a man of the "nat- 

 ural " races speaks a word of any language but his own, the odds are at least ten to one that it is English, and that a work of 

 this kind should, therefore, appeal to English-speaking people in a way that it can hardly do to those of any other race. 



DAILY NEWS.—" The same publishers are rendering a most signal service to the cause of education in its best sense, 

 by their publication of Friedrich Ratzel's Volkerkunde, or History of Mankind." 



NATURAL SCIENCE.—" It is an indispensable book of reference to every student of Ethnology, and it has long been 

 -a regret that the absence of an English translation rendered it inaccessible to a large proportion of English travelers. . . . 

 'The illustrations, which are an important feature in the original, are being admirably produced." 



A HISTORY OF ELEMENTARY 

 MATHEMATICS, 

 With Hints on Methods of Teaching. By Flo- 

 EIAN Cajoei, Ph. D., Professor of Physics in 

 Colorado College. Crown 8vo, cloth, $1.50 net. 



THE EDUCATION OF THE CENTRAL 

 NERVOUS SYSTEM. 



A Study of Foundations, especially of Sensor and Motor 

 Training. By Reubest Post Halleck, M. A. 

 (Yale). 12mo, cloth, $1.00 net. 



NEW VOLUME. 



THE ELEMENTS OF PHYSICS. 



A College Text-Book. By Edwaed L. Nichols and William S. Feanklin, both of the Department of 

 Physics, Cornell University. Vol. II. Electricity and Magnetism. 8vo, cloth, $1.50 ?ie<. Already pui- 

 lished. Vol.1. Mechanics and Heat. 8vo, cloth, $1.50 «ei. In preparation. Vol. III. Sound and Light. 



The first volume, which was issued about January 1, 1896, is devoted to the subject of Mechanics and Heat, the second to 

 ^Electricity and Magnetism, and the third to Sound and Light. No attempt has been made in this work to produce a com- 

 plete manual or compendium of experimental physics. The book is planned to be used in connection with illustrated lec- 

 tures, in the course of which the phenomena are demonstrated and described. The authors have accordingly confined 

 themselves to a statement of principles, leaving the lecturer to bring to notice the phenomena based upon them. In stating 

 these principles free use has been made of the calculus, but no demand has been made upon the student beyond that sup- 

 plied by the ordinary elementary college courses on the subject. 



A SKETCH OF THE NATURAL HIS= 

 TORY OF AUSTRALIA. 



With some Notes on Sport. By Feedeeick G. Af- 

 LALO, F.E.G.S., F.Z.S., etc. Author of "Sea- 

 fishing, on the English Coast," "Hints and 

 Wrinkles on Sea-fishing." Illustrated by F. 

 Seth. 12mo, cloth, pp. xxv + 307, $1.75. 



THE ELEMENTS OF ELECTRO= 

 CHEMISTRY. 



By Max Le Blanc, Professor of Chemistry in the 

 University of Leipzig. Translated by W. E. 

 Whitney, Instructor of Chemistry in the Massa- 

 chusetts Institute of Technology of Boston, U.S.A. 

 12mo, cloth, pp. X + 284, $1.50 net. 



ALTERNATING CURRENTS AND ALTERNATING CURRENT MACHINERY. 



Being Vol. II. of the Text-Book on Electro-magnetism and the Construction of Dynamos. By Dugald C. 



Jackson, C.E., Professor of Electrical Engineering in the University of Wisconsin; Member of the 



American Society of Mechanical Engineers, the American Institute of Electrical Engineers, etc., and 



John Peice Jackson, M.E., Professor of Electrical Engineering in the Pennsylvania State College; 



Member of the American Institute of Electrical Engineers, etc. 12mo, cloth, pp. xvii + 729, $3.50 net. 



A text-book for engineering colleges and a reference-book for electrical engineers. The simplest treatment of the 



theory of alternating currents which can be considered complete is chosen. The latter part of the book contains a thorough 



discussion of the methods of calculating transformers, alternating current motors, and rotary transformers, with chapters 



on their construction, testing, and operation in service. The book is profusely illustrated by diagrams and figures. 



THE MACMILLAN COMPANY, 66 Fifth Avenue, New York City. 



