24)0 THE LAWS OF ORGANIC 



strangers. On this account they generally be- 

 came dull and inanimate, and I found this to be 

 the case with others which had undergone no 

 operation. When removed to their old abode 

 they ran about with their accustomed cheerful- 

 ness. Mental depression influences the diges- 

 tive powers of a rabbit as well as the more com- 

 plex functions of an intellectual being. I men- 

 tion this circumstance, as I am convinced that it 

 ought not to be neglected in experiments which 

 are instituted for the purpose of estimating the 

 value of any single organic law in regard to the 

 function of digestion or any of the secretions of 

 the system. 



