SCIENCE 



New Semes 



Vol. XXXVII. No. 945 



Friday, Februaey 7, 1913 



Single Copiks, 15 Cts. 

 Annual Subscription , $5.00 



Daogherty's Economic Zoology 



This work i3 issued, for convenience, in two parts. Part I is a Field 

 and Laboratory Guide, interleaved for notes. Part II is the textbook 

 part or the Principles. Not only does this work give the salient facts 

 of structural zoology and the development of the various br anches of 

 animals, but also the natural history— the life and habits — thus showing 

 the interrelations of structure, habit aud environment. 



BvL. S. DaughertT, M.S , PhD., Professor of Zoology, State Normal School, Kirksville, Mo.; and 

 M. C. Uaugherty, author with Jackson of "Agriculture Through the Laboratory and School 

 Garden." Fart 1— Field and Laboratory Guide • 12mo of 275 pages, interleaved. Cloth, 81.25 net. 

 Part II— Pnnapfes ■ 12mo of 406 pages, illustrated. Cloth, S2.00 net. 



Drew's Invertebrate Zoology 



Professor Drew's work gives the student a working knowledge of com- 

 parative anatomy and leads him to an appreciation of the adaptation 

 of the animals to their environments. The type method of study is 

 followed. 



Prof. John M. Tyler, Amherst College : ' 'It covers the ground well, 

 is clear and very compact. The table of definitions is excellent.'' 



Invertebrate Zoology. By Oilman A. Drew, Ph.D., Professor of Biology, University of Maine. 12mo 

 of 201 pages. Cloth, $1.25 net. 



This work has chapters on the origin of life and its manifestations, 

 the cell and cell division, reproduction, ontogenesis, conformity to 

 type, divergence, structural and blood relationship, parasitism, mutila- 

 tion, and regeneration, grafting, senescence, etc. 



Prof. W. R. McConnell, Pennsylvania State College: ' ' It has some 

 admirable features, the most valuable of which is the careful resume 

 of the subjects of heredity and evolution.'' 



Biology: Oeneral and Medical. By Joseph McFarland, M.D., Professor of Pathology and Bacteriol- 

 ogy, Medico-Chirurgical College, Philadelphia. 12mo of 440 pages, illustrated. Cloth, $1.75 net. 



Stiles' Nutritional Physiology 



Dr. Stiles takes up each organ, each secretion concerned with the pro- 

 cess of digestion, discussing the part each plays in the physiology of 

 nutrition — in the transformation of energy. A valuable feature is 

 Dr. Stiles' happy use of homely similes to illustrate the more obscure 

 physiologic actions. 



Prof. Colin C. Stewart, Dartmouth College : " It is remarkable for 

 the fineness of its diction and for its clear presentation of the subject." 



Nutritional Physiology. By Percy G. Stiles, Assistant Professor of Physiology in Simmons College ; 

 Boston. 12m6 of 271 pages, illustrated. Cloth, $1.25 net. 



W. B. SAUNDERS COMPANY West Washington Square, Phila. 



ftn a 1913 



