clvi Journal of Comparative Neurology. 



the human race, like the domestic animals, tends in degenerescence 

 to revert to ancestral conditions is vigorously combated. 



The concluding chapters discuss quite fully the stigmata of de- 

 generacy, many of which are illustrated with half-tones taken from 

 photographs. These stigmata are defined as characters, transmissible 

 usually by dissimilar heredity, which deviate from the type of the 

 race to which the individual belongs and which tend to eliminate the 

 family exhibiting them from the race. They must be carefully dis- 

 tinguished from deformities resulting from pre-natal accidents, intra- 

 uterine diseases, syphilis, etc., and also probably from those resulting 

 from atavism. They may all be included under disturbances of the 

 embryonic evolution, which may in general be characterized as the 

 dissolution of heredity. It is to be remembered that these stigmata 

 are characteristic of all kinds ef degeneracy in common, from what- 

 ever cause, and that therefore the attempt to establish a criminal type 

 has been vain. Mal-nutrition, general or localized, is regarded as the 

 common cause of most of the degeneracies; they may therefore be 

 counteracted, either by appropriate crosses with vigorous stock or by 

 any other means which will elevate the vitality of the family affected. 



c. j. H. 



Bissell's Manual of Hygiene. 1 



To the practical neurologist few subjects are of more direct inter- 

 est than matters of personal and public hygiene. The intimate rela- 

 tion which exists between many neuroses and unsanitary conditions 

 both within the body and in its environment, is too patent to require 

 demonstration. The work before us has much to be commended. 

 The style is simple and direct and the subjects chosen for discussion 

 are for the most part such as are of the greatest practical importance 

 to the public at large as well as to the physician. For instance, con- 

 tagious and infectious diseases are treated in a practical non-technical 

 manner, and among these tuberculosis is given an amount of space com- 

 mensurate with its importance. 



The work is prepared by the author to serve as a basis for a 

 course of lectures to her own classes of undergraduates in a medical 

 college. It is planned along pretty good lines and will doubtless 

 serve this purpose very well ; but much will depend on the course of 

 lectures given, for the treatment in this manual of most of these sub- 



^isseli^ Mary Taylor. A Manual of Hygiene. New York, The Baker 

 and Taylor Co., 1894. 



