254 Hypophysial Diabetes 



hypophysial extract damages the islets, but its continued action is unnecessary 

 during the permanent diabetic state. 



This history of anterohypophysial diabetes stops at this point without 

 discussing the important contributions of Long, Chambers, Collip, Young, 

 Soskin, and other investigators, because they are more recent and the exact 

 chronology is better known. 



The discoveries made by Professor Herbert M. Evans in several fields of the 

 biological sciences, among them in the physiology of the hypophysis, are 

 many and fundamental. I am happy to associate myself in the homage now 

 dedicated to him by writing this exposition of some fundamental points in 

 the history of anterohypophysial diabetes, which I know as actor or coeval. 

 Professor Evans was the first to demonstrate the anterohypophysial diabeto- 

 genic action in mammals, and discovered that this effect may persist for several 

 weeks after the treatment is ended. Later his pupils, Bennett and Russell, 

 made other valuable contributions. I take this opportunity to express to 

 Professor Evans my greatest admiration and sincere friendship. 



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