SUPPLEMENTAL HISTORY OF MAN. 117 



But to give a more perfect idea of this subject, we 

 quote a passage from this celebrated anatomist. 



" All the simiae, in this respect, come after man ; 

 for although the proportion of their brain to the 

 body, particularly in the small species with prehen- 

 sile tails, is equal to that of man, their very large 

 ears, eyes, tongue, and jaws, require a much larger 

 mass of brain, than the corresponding parts in the 

 human subject; and, if you remove this, the ratio 

 of the brain to the body, is much diminished. 



'I Animals of various kinds, seem to me to possess 

 a larger or smaller quantity of this superabundant 

 portion of brain according to the degree of their 

 sagacity and docility. The largest brain of a horse 

 which I possess, weighs one pound seven ounces ; 

 the smallest human brain that I have met with in 

 an adult, two pounds five ounces and a quarter. 

 But the nerves in the basis of the horse's brain are 

 ten times larger, than in the former instance, al- 

 though it weighs less by fourteen ounces and a 

 quarter. 



" But we are not hastily to conclude that the human 

 species have smaller nerves than any other animals. 

 That my ideas may be better understood, I will 

 state the following imaginary case. Suppose the 

 ball of the eye to require 600 nervous fibrils in one 

 instance, and in another half the size 300; further, 

 that the animal with 600 fibrils possesses a brain 

 weighing seven drams, and that with 300 a brain 

 of only five drams. To the latter we ought to 

 ascribe the larger brain, and a more ample capacity 



