2O2 THE HUMAN BODY. 



Sight is certainly more necessary to man than hearing, but 

 still the blind are generally gay and communicative, while 

 the deaf seem inclined to melancholy. As to the relative 

 influence of these two senses on the development of the 

 intellect, we know that the education of the deaf is slow but 

 may be complete, while that of the blind is, on the contrary, 

 rather rapid, but is almost always very limited; many ideas 

 cannot be acquired by them, and, as has been remarked by 

 M. Longet, their minds rarely attain maturity. 



