g'74 LECTURE VI. 



The long continuance of life, when the 

 brain is removed in tortoises, the dissec- 

 tions of that organ by Doctors Gall and 

 Spurzheim, the late experiments of Le 

 Gallois and Dr. Wilson Phillip, showing 

 that the vital functions can be carried on 

 in warm as well as in cold blooded ani- 

 mals, after the brain has been removed, 

 provided, indeed, artificial respiration be 

 kept up in the former class, all tend to 

 show, what comparative anatomy also 

 teaches, that the brain is not essential to 

 the vital functions. There are animals 

 which have no brains, and in proportion as 

 they possess them, so do they appear to 

 have sensation, volition, and other faculties. 

 Every portion of newly acquired know- 

 ledge only corroborates the already well 

 established opinion, that sensation, voli- 

 tion, and the intellectual faculties are con- 

 nected with the brain alone. 



The experiments of M. Le Gallois show 

 that there is an analogy in the functions of 

 the medulla spinalis in the higher and 

 lower classes of animals. In the latter, it is 



