PREFACE. V 



own, on the one side, how the brains of animals, and 

 jcially those of the quadrumanous series, lead on to 



i structural conformations met with in the brain of Man ; 

 id, on the other, how the mental processes occurring in 

 vien have their rudimentary correlatives in the mental 

 processes of lower Animals. 



Further, in dealing with the Human Brain as an orgaL 

 of Mind, I have tried to show the nature, and something 

 as to the extent, of the evidence in existence concern- 

 ing the * localization ' of Sensory and Thought-processes, 

 as derived from the accurate study of states of disease 

 during life and morbid brain changes after death. I have 

 thus attempted to point out in some detail what light 

 may be thrown upon this all-important part of our sub- 

 ject by the two-sided investigation of eases in which 

 Perception, Volition, Memory, Thought, and Speech have 

 been variously interfered with during life. 



It remains for the labours of future workers in many 

 countries to enable us, little by little, to fill in- tins broad 

 but mere outline sketch of the subject to which the 

 present volume is dedicated as little as possible with 

 weak markings made by more or less hazy and uncertain 

 theories, and as much as possible with the stronger lines 

 graven by actual knowledge. 



H. C. B. 



20, QUEEN ANNE STREET, W. 

 August, 1882. 



