I9 o TEXT-BOOK OF PHYSIOLOGY. 



which the following is an abstract, in which the mode of preparation 

 and the time required for the digestion of different foods are exhibited : 



TABLE SHOWING DIGESTIBILITY OF VARIOUS ARTICLES OF FOOD. 



Hours. Minutes. 



Eggs, whipped, - i 20 



" soft boiled, . 3 



" hard boiled, 3 3 



Oysters, raw, 55 



" stewed, 3 3 



Lamb, broiled, 3 



Veal, broiled, 4 



Pork, roasted, *5 



Beefsteak, broiled, - 3 



Turkey, roasted, 25 



Chicken, boiled, -4 



" fricasseed, - 2 45 



Duck, roasted, 4 



Soup, barley, boiled, i 3 



" bean, " - 3 



" chicken, " - 3 



" mutton, " --- 3 3 



Liver, beef, broiled, _ 2 



Sausage, ---3 20 



Green corn, boiled, - 3 45 



Beans, 2 30 



Potatoes, roasted, - 2 30 



bo led, 3 30 



Cabbage, ' 4 3 



Turnips, ' - 3 3 



Beets, 3 45 



Parsnips, ' 2 30 



Movements of the Stomach. During the period of gastric 

 digestion the muscle walls of the stomach become the seat of a 

 series of movements, peristaltic in character, which not only incor- 

 porate the gastric juice with the food, but also serve to eject the 

 liquefied portions of the food into the small intestine. 



The movements of the human stomach as described by Beau- 

 mont, as well as the movements of the dog's stomach as stated by 

 different observers, are not in agreement in all respects, and are, 

 moreover, open to question for the reason that they were not ob- 

 served under strictly physiologic conditions. The more recent in- 

 vestigations of Cannon have thrown new light on this subject. By 

 means of the Rontgen rays he has been enabled to study the move- 

 ments in the living animal and under normal conditions. The 

 animal (the cat) was fed with bread and milk, to which was added 

 subnitrate of bismuth. This substance, being opaque, rendered the 

 movements of the stomach walls visible on the fluorescent screen. 

 With paper placed over the screen it was possible to sketch the 

 changes in shape that the stomach undergoes at different periods of 

 the digestive act. Some of these changes are represenetd in Fig. 



