PREFACE. 



THIS work is addressed to those who are 

 interested in studying Man as a living and 

 thinking being. 



Mind is the highest faculty of man ; what 

 Mind is we do not know, and probably we 

 cannot know, but there is abundant evidence 

 that mind is in some way connected with 

 brain-action. In man, the manifestations of 

 mind are very slight in those whose brains 

 are small and ill formed ; defective action of 

 the mind is often found to be coincident 

 with physical disease of the brain ; injury to 

 the brain may deprive a man of his mental 

 power. In animals, the signs of intelligence 

 are in some degree proportional to the size 



b 



