58 



the brain," make us feel " as if the full 

 bosom wanted to be cleansed of that pe- 

 rilous stuff that weighs upon the heart." 

 But it is surely as simple, and more correct 

 to express ourselves as Gall and Spurzheim 

 would have us, by saying that a person 

 has benevolent or just sentiments, as that 

 he has a good or an u})right heart. 



I have contended, in the lectures on 

 physiology delivered before this College, 

 that there are but two opinions which can 

 possibly be entertained concerning the 

 cause of the vital phsenomena. We must 

 either believe that they are the result of 

 properties belonging to the atoms of matter 

 of which living bodies are composed, or of 

 some subtile, invisible, and highly mobile 

 substance or substances, inhering in, and 

 connected with the evident materials of 

 living, beings. The latter opinion seems 

 to me the most probable, and is, I believe, 



