1903.] Adaptation of the Pancreas to different Food-stuffs. 39 



TABLE II. Figures representing the number of c.c. which reduced 

 50 c.c. Pavy's solution. 



* Control, 8 '0 c.c. 



As far as they go, these experiments show that the intestinal mucous 

 membrane of milk-fed animals, injected into dogs not fed on milk, 

 causes the pancreas to secrete lactase, whereas lactose or extracts of 

 mucous membrane injected separately have no such action. In the 

 present stage of this investigation no complete explanation of these 

 results can be offered. But it seems probable that as a result of the 

 action of .the intestinal mucous membrane on lactose, some chemical 

 substance is formed, which passes by the blood-stream to the pancreas, 

 where it stimulates the latter to manufacture a specific enzyme 

 lactase. 



REFERENCES. 



Weinland, ' Zeitschrift fur Biologic,' vol. 38 and 40. 



Walther, ' The Work of the Digestive Glands,' Pawlow and Thompson. 



Bayliss and Starling, ' Journal of Physiology,' 1902. 



