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Wo Bo SAUNDEES COMFAMY 



West Washington Square Philadelphia 



London : 9, Henrietta Street, Covent Garden 



Economk Zoology: Part //. By L. S. Daugherty, M.S.. 

 Ph. D., Professor of Zoology, State Normal -School, KirksviUe, 

 Mo • and M. C. Daugherty. i2mo of 406 pages, illustrated. 

 Cloth, $2.00 net. Just Ready. 



There is no other book just hke 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 lije 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. 

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

 " Economic Zoology." 



Sitiki' M^ftiriiLioiriial Pky§i©l©gy 



Nutritionat Physiology. By Percy G. Stiles, Assistant Pro- 

 fessor of Physiology in Simmons College ; Instructor m Physiology 

 and Personal Hygiene in the Massachusetts Institute of Tech- 

 nology, Boston. lamo of 271 pages, illustrated. Cloth. $1.25 net. 



Jiist Ready. 



Dr. Stiles' new work expresses the most advanced views on this im- 

 portant subject. It takes up each organ, each secretion concerned 

 with the process of digestion, discussing the part each plays m the 

 physiology of nutrition-in the transformation of energy. In tact, 

 the keynote of the book throughout is " energy "-its source and its 

 conservation. A feature of special value, particularly for teachmg 

 purposes, is the admirable way Dr. Stiles clarifies the more obscure 

 physiologic actions by the use of homely simihes. 



