MEAN TIME OF DIGESTION. 



239 



aature formed a kind of a valve which closed the opening from the 

 inside, thus preventing loss of the contents of the stomach, but on 

 pushing aside this valve, the process of digestion could be plainly 

 seen. It was through this orifice that the appearance of the' coats 

 of the stomach and food at different stages of digestion were ex- 

 amined. 



TABLE, 



SHOWING THE MEAN TIME OF DIGESTION OF THE DIFFERENT ARTICLES 



OF DIET. 



