SUPPLEMENTAL HISTORY OP MAN. 119 



with the cerebrum, and none immediately with that 

 part which is properly called the cerebellum. 



It is asserted that the magnitude of the cerebral 

 hemispheres in the human subject far exceeds that 

 of the same parts in any other of the mammalia, 

 whatever may be the proportion between the entire 

 encephalon and the rest of the body. 



Another characteristic of the human brain is that 

 the number of its parts is greater, and the deve- 

 lopment of each more complete than in any other 

 animal. No individual part is found wanting in man 

 which is possessed by any other, while many are 

 deficient in several of those parts possessed by men, 

 or have them, very much reduced in magnitude. An 

 assertion has, in consequence of this fact, been 

 made that it would be possible by diminishing or 

 changing proportions to form the brain of any animal 

 out of the materials of the human; but that the 

 converse of this proposition is not true. 



The human brain also approaches nearer than any 

 other to the figure of a sphere. We have already 

 noticed the fact of the smallness of the nerves in 

 proportion to the brain, and of the decrease of the 

 latter and increase of the former as we descend from 

 man in the scale of life. We may now add that 

 in the foetus, and in the child, the nerves are of a 

 magnitude proportionally greater than in the adult 

 subject. 



That man has the largest cerebrum in proportion 

 to the cerebellum is not quite so certain as that 

 he has the largest cerebrum in proportion to the 



