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vr^xxviiT N«.«fi Friday, July 4, 1913 single copies, is cts. 



VOL. XXXVIII. No. 966 | | Annual Sub80eiption, $5.00 



Drew's Invertebrate Zoology 



JUST OUT— NEW (2d) EDITION 

 For this edition Professor Drew has subjected his book to a very- 

 searching revision, bringing it into accord with the latest knowledge. 

 His work gives you a working knowledge of comparative anatomy and 

 leads you to an appreciation of the adaptation of the animals to their 

 environments. The type method 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 Gillman A. Drew,5 Ph.D., Assistant Director of the Marine Biological 

 Laboratory, Woods Hole, Mass. 12ino of 213 pages. Cloth, $1.25 net. 



Daugherty's Economic Zoology 



This work is 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 but also the natural history — the life and habits. 



J. Remsen Bishop, Ph.D., Eastern High School, Detroit. "The 

 illubtrations alone prove the book superior to any other." 



By L. S. Dougherty, M.S., Ph.D., Professor of Zoology, State Normal School, Kirksville, Mo. ; and 

 M. C. Dougherty, author with Jackson of '■ AKriculture Through the Laboratory and School 

 Garden.'* Parti — Fietd and Laboratory Guide. 12mo of 275 pages, interleaved. Cloth, 81.25 net. 

 Pare 11— Pi-inciples. 12mo of 406 pages, illustrated. Cloth, $2.00 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 resume 

 of the subjects of heredity and evolution." 



Biolopy: Qeneral and Medical. By Joseph McFarland, M.D., Professor of Pathology and Bacteriol- 

 ogy, Medlco-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. 



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

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



Nutritional Physioloqy. 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. 



