CONCLUSION 99 



1901, containing an address delivered by me at Brooklyn, New 

 York, in May of that year. 1 That address I had not looked up 

 for a decade or so, and it was with not a little surprise that I 

 found laid down there the physico-chemical conception of in- 

 heritance here given, and the doctrine of direct inheritance of 

 metabolic conditions, such as gout and of disturbances of the 

 internal secretions. Rather, therefore, the apology should be 

 that I have plagiarized myself in so wholesale a manner. I shall, 

 however, be satisfied if it is demonstrated that the work of 

 medical men of this generation, of pathologists and bacteriologists 

 — work formed upon the observations and methods of the great 

 biologists of the past — is repaying the debt to biology by estab- 

 lishing principles which are basal for general biological advance. 



1 See Pfc. II. Chap. II. 



