BOOK REVIEWS 345 



farm; and chapters on the artistic appreciation of trees, such as, 

 chapter 32 on trees and the early summer landscape. On the 

 whole, the book is to be recommended as an exceedingly valuable 

 addition to the nature-study library of any school or teacher. 



Mammals of Colorado. Ed. R. Warren, xxiv + 300. G. P. 

 Putnam Sons, New York. 

 This volume is a scientific description of the various mammals 

 of Colorado, but in it there are a great many notes on the natural 

 history of the forms that wiU be particularly valuable to the teacher 

 in many of the western states. The book is admirably illustrated, 

 and only one who has tried to obtain pictures of the mammals in 

 the wild can appreciate the good photogiaphy that the author has 

 accomplished. As in many of the western states, the cattle men 

 of Colorado have been pestered with the wolves and coyotes ; the 

 pages on the habits of these animals are exceedingly interesting. 

 The statement is made that the cattle men estimate their loss from 

 these animals at about 10%. Even adult animals are killed, 

 though the calves and colts and lambs suffer most. In a single 

 year, from July, 1903 , to June 30, 1904, the author states that boun- 

 ties were paid on 19,514 coyotes. In 1Q07 in the valley of Green 

 River, in Wyoming, twelve wolf dens were discovered and 70 pups 

 killed by the ranchers and forest rangers. In the same year in 

 these mountain states, the total of 1723 wolves were killed. All 

 of this gives some idea of the abundance of the animals. 



Laboratory Studies in Mallian Anatomy. I. W. Wilder. Pp. xi + 

 156. P. Blakiston'sSon&Co. $1.25. 

 This is not a book that would appeal to the nature teacher, but 

 might be of service to the high school instructor, though more 

 properly a guide for college work. It gives in clear language the 

 directions for the study of several mammahan types, indicating 

 briefly also the methods of preparation of some of the more 

 important histological tissues. 



Introduction to the Study of Fossils. Hervcy W. Sliimcr. Pp. xiv 

 + 450. Mac Millan Co. $2.40. 

 This is primarily a college text. Every student ol' animal lif 

 however little his studies may take him into the scientific (^ompl 

 ties, will enjoy turning the pages of this, at least to ha\'c lii 



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