* Saunders' College Text-Books 



Biology: General and Medical. By JOSEPH McFARLAND, M. D. f 

 Professor of Pathology and Bacteriology, University of Pennsyl- 

 vania. i2mo of 457 pages, illustrated. Cloth, $1.75 net. 



New (^d) Edition Published January, 1917. 



This work is particularly adaptable to the requirements of scientific 

 courses. There are chapters on the origin of life and its manifesta- 

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

 to type, divergence, structural and blood relationship, parasitism, mu- 

 tilation 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 resum6 of 

 the subjects of heredity and evolution." 



Invertebrate Zoology. By GILMAN A. DREW, Ph. D., Assistant Di- 

 rector of the Marine Biological Laboratory, Woods Hole, Mass. 

 i2mo of 213 pages. Cloth, $1.25 net. Second Edition July, 1913 



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. It is a practical work, express- 

 ing the practical knowledge gained through experience. The type 

 method of study has been followed. 



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

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



Economic 



Economic Zoology. By L. S. DAUGHERTY, M. S., Ph. D., Professor 

 of Science, Missouri Wesleyan College; and M. C. DAUGHERTY. 

 Part I Field and Laboratory Guide: 12010 of 276 pages, inter- 

 leaved. Cloth, $1.25 net. Part II Principles: i2mo of 406 

 pages, illustrated. Cloth, $2.00 net. Second Edition August, 1917. 



Not only does this work 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. 



Prof . V. E. Shelf ord, University of Chicago: "It has many merits 

 and is the best book of the kind on the market." 



