35 



Much work still remains to be done in the elucidation of various 

 questions connected with the origin, conditions of formation, and mode 

 of action not only of the mammary hormone but also of the other chemical 

 messengers which I have mentioned in these Lectures. But the facts 

 which I have been allowed to lay before you will, I trust, serve to con- 

 vince you of the great part played by chemical processes in the coordi- 

 nation and regulation of the different functions of the body. If, as I am 

 inclined to believe, the majority of the organs of the body are regulated 

 in their growth and activity by chemical mechanisms similar to those I 

 have described, an extended knowledge of the hormones and their modes 

 of action cannot fail to render important service in the attainment of 

 that complete control of the bodily functions which is the goal of medical 



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