770 DIABETES. [BOOK n. 



the diabetic puncture, or of morphia or other poisoning, in hurry- 

 ing on the hepatic store of glycogen into sugar, and thus 

 diminishes the sugar in the urine ; the presence of the glycerin 

 in the hepatic cell appears to be in some way a hindrance to the 

 conversion of the glycogen into sugar. Now glycerin injected 

 into the alimentary canal of a normal animal leads to an increase 

 of glycogen in the liver ; and the view very naturally suggests 

 itself that this increase arising from the glycerin is to be 

 explained by the glycerin inhibiting in some way a normal 

 conversion of the glycogen store into 'sugar which is continually 

 going on, and thus increasing for the time that store. 



