xxxviii Journal of Comparative Neurology. 



stating that the enlargement of the nervous system is due, first to the 

 increase in number of the neuroblasts formed, and secondly to their in- 

 crease in size. He thinks that in the growth from the child to the 

 adult the increase in brain weight is due to the development of the 

 medullary substance about the neuron. 



In the chapter upon the " Architecture of the Central Nervous 

 System " at maturity, there are given those anatomical features of the 

 brain that are familiar to most students of anatomy, but in addition 

 there are a number of interesting correlations that no mere text-book 

 of anatomy ever gives. 



The chapter upon " Changes due to Growth " tells us how little 

 we know upon this important subject. 



Chapter XIII discusses localization of function giving the main well 

 known facts upon the subject. The " Physiology of the Nerve Cell " 

 and " Physiological Rhythm" present some of the results of later psy- 

 chological work; while the chapter on " Fatigue" gives some of the 

 observations of Hodge and Vas, in which the author is inclined to lay 

 more stress upon Hodge's work than upon the experiments of others 

 that have given different results. In the " Education of the Nerv- 

 ous System" there are a number of sound generalizations. 



This book is to be heartily recommended to the student and edu- 

 cated layman. While it may at times be difficult for the latter to fol- 

 low' all the mathematical details, yet a persistent reading will give him 

 a broad grasp of many important and useful facts. 



SMITH ELY JELLIFFE, M. D. 



Recent Studies in the Forebrain of Reptiles.^ 



The latest number of this series, Avhich comparative neurologists 

 have learned to prize as much for its appreciative summaries of the 

 work of others as for the well-digested results of the author's own pa- 

 tient studies, is just at hand. Among recent writers Dr. Edinger has 

 the honorable distinction of never slurring over or consciously misrep- 

 resenting the work of others. We are often obliged to seek from other 

 sources the evidence of the large share the author's own work has had 

 in attaining the results accredited to others. An error is always frankly 

 admitted and the genial Doctor seems to feel that a personal favor is 

 conferred by the writer who is fortunate enough to set him right. It is 



* Edinger, Dr, L. Neue Studien iiher das Vorderhirn der Reptilien. Un- 

 tersuch. u. d. vergl. Anat. des Gehirns, 3. Frankfurt, 1896. 



