SCIENCE— ADVERTISEMENTS 



IN PREPARATION 



Vertebrate Zoology 



By Horatio H. Newman, Ph.D., Professor of Zoology and Embryology 

 in the University of Chicago. Octavo, Illustrated, xiii+432 pages. 

 To be published in January. 



A text-book for college courses in vertebrate zoology and comparative anat- 

 omy in which the traditional material is presented clearly and thoroughly. 

 The author has added to the interest as well as the scope of the book by 

 making use of the most recent advances in biology. The subject is ap- 

 proached from the dynamic rather than the structural point of view, em- 

 phasis being placed upon the physiological, phylogenetic, and ecological as- 

 pects. The origin and evolution of vertebrates is considered; and the evo- 

 lutionary stages in the development of vertebrates from Cyclostomata 

 through Mammalia are made the basis of arrangement. Careful attention 

 is also given to anatomical facts and data. 



Among the new conceptions which Professor Newman has stressed are 

 the axial gradient, racial senescence, and adaptive radiation. The book is 

 particularly well illustrated. 



RMCENTI^Y PUBLISHSn 



A Short Course in Mathematics Plane Trigonometry 



By Robert E. Moritz, Professor By John W. Young and Frank 



of Mathematics in the University M. Morgan, Professors of Mathe- 



of Washington. Cloth, i2mo, matics in Dartmouth College. 



236 pages. $2.00. Cloth, i2mo, 122 pages. $1.25. 



Trigonometry, algebra, graphs, and This new Plane Trigonometry was 

 co-ordinate methods are treated in prepared to supply the need for a 

 this new text for short courses in brief text which emphasizes the nu- 

 mathematics. The author has con- merical aspects and applications of 

 densed the material as much as pos- trigonometry. It embodies the char- 

 sible, but has carefully introduced acteristics features of the widely ap- 

 every principle which is necessary as proved sections devoted to trigonom- 

 preparation for analytical geometry etry in " Elementary Mathematical 

 and calculus, or in engineering and Analysis," the earlier work by Pro- 

 other fields of applied science. The fessors Young and Morgan. The ma- 

 problems emphasize these fundamen- terial has been carefully revised, and 

 tal and essential principles. The fully half of the present book is en- 

 book provides a substantial, concen- tirely new. Among the distinctive 

 trated, and practical text-book for sectionsof this trigonometry are those 

 the new type of Freshman course. which explain the use of the haversine. 



THE MACMILLAN COMPANY 



PUBLISHERS NEW YORK 



