SCIENCE 



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VOL. XXXVI. No. 931 



Friday, November 1, 1912 



SlNSLI C0PIB8, 16 CTS. 

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Daugherty's Economic Zoology 



There is no other book just like this. Not only does it give the salient 

 facts of structural zoology and the development of the various branches, 

 but also the natural history — the life and habits. It emphasizes the 

 economic phase throughout, showing the beneficial or harmful tenden- 

 cies of each animal to the life of man. The illustrations are helpful. 



Economic Zoology: Part II. By L. S. Daugherty, M.S., Ph.D., Professor of Zoology, State Normal 

 School, Klrksv'ille, Mo.; and M C. Daugherty. 12mo of 406 pages, illustrated. Cloth, 82.00 net. 



By the same authors : Field and Laboratory Guide. Part I of 

 "Economic Zoology." 



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 ^"^ n 

 followed. ^y^<^^'^ 



Peof. John M. Tyler, Amherst College : "It covers the ground well, ^ , , . , 

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



Invertebrate Zoology. By Gilman A. Drew, Ph.D., Professor of Biology, University of Maine. 12m\ 

 of 201 pages. Cloth, $1.25 net. ^ 



McFarland's Biology 



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 r6sum6 

 of the subjects of heredity and evolution.'' 



Biology : Beneral 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. 



Peof. Colin C. Stewabt, 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. 12mo of 271 pages, illustrated. Cloth, $1.25 net. 



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



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