Book Reviews 



Economic Zoology. By Vernon L. Kellog and Rennie W. Doane. 



Pp.x + 532 Henry Holt & Company, $1.50 

 Principles of Economic Zoology. By L. S. Daugherty and 



M. C. Daugherty. Pp. vii + 410. W. B. Saunders Co. $2.00 



It is interesting to find books appearing now from the presses 

 of the publishing houses on the economic phase of zoology. 

 These two are good samples of the type. They are both in- 

 intended for secondary school work, and apparently indicate a 

 changing point of view in high school instruction in zoology. 

 The Daugherty text takes up the subject matter on the basis 

 of classification, as has been quite usual in the zoology books, 

 but it gives considerable attention to the economic phases of 

 the subject. The Kellogg and Doane text takes up the study of 

 the frog and of the grasshopper as introductory to the study of 

 animal life, then follows the customary order of treatment from 

 the lower to the higher animals. But it devotes Part ii consist- 

 ing of 167 pages, to economic zoology, and entomology, the major 

 part of it to the latter phase. 



A careful analysis of these two texts shows that 7.7% of the 

 Daugherty book is distinctively economic, and 43.9% of the 

 Kellogg and Doane text. 



The First Principles of Heredity. S.Herbert. Pp. viii + 



199. The Macmillan Co. $1.75. 



This book was written "to supply in a simple and yet scientific 

 manner all that may be desirable for the average intelligence 

 to know about heredity and related questions, without at the 

 same time assuming any previous knowledge of the subject on 

 the readers part." It is the result of a course of lectures given 

 by the author to a class of working men and others and was pre- 

 pared because no book containing a simple but adequate account 

 of the present status of the subject could be found. The fol- 

 lowing list of the chapter headings will give a good idea of the con- 

 tents: i, Introduction; ii, Reproduction; iii, The germ-cells; 

 iv, and v, Theories of Heredity; vi, The Inheritance of 

 Acquired Characters; vii, The Inheritance of Disease; viii, 

 Mendelism; ix, Biometrics; x, Conclusions. There is a 

 short literature list and a valuable glossary. The topics consid- 

 ered are well done and should be of vital interest to every one. 



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