400 . CURDLING OF MILK. [BOOK n. 



( 206) be obtained from it ; it seems indeed allied to the bodies 

 which we have called nucleo-albumins. 



Rennin is abundant in the gastric juice and in the gastric 

 mucous membrane of ruminants, but is also found in the gastric 

 juice of other animals, and either it, or what we shall presently 

 have occasion to speak of as the antecedent of the ferment or 

 zymogen, is present also in the mucous membrane of the stomach 

 of most animals. A very similar if not identical ferment has also 

 been found in many plants. 



