The Human Species.

In this work the structure, functions and diseases of the human species are compared with those of animals. It is evident that the book is intended for the general reader interested in the biologic relationships of human beings, and to such it is heartily recommendable, being instructive, easy to read, and trustworthy in most of the essentials. Especially interesting in the discussion of the ancestors of man, of the distribution of mankind, of psychology and special comparative psychology, of emotions and their expression, of social conditions and observances, and of arts and handicrafts. There are mistakes and shortcomings in the section on pathology. We are told that cultures of tubercle bacilli can not be inoculated into guinea-pigs. Nothing is said of the relation of Treponema pallidum to syphilis. The proof that yellow fever is communicated by a mosquito is stated inadequately. The style is simple and adapted to the demands