THE REGULATION OF GASTRIC SECRETION. 193 



after which it decreases steadily in amount until at the 

 end of a number of hours it has fallen to the zero-mark once 

 more. The cause of this decrease is perhaps explained by 

 the gradual decrease in the amount of food undergoing diges- 

 tion in the stomach. The following experiments of CHIGIN 

 illustrate the above: 



RATE OF GASTRIC SECRETION AFTER FEEDING 100 QMS. MEAT. 



Hour after feeding. Quantity of juice in c. c. 



Exp. a. 

 11.2 

 8.2 

 4.0 

 1.9 

 0.1 



Total 25.4 23.9 



These values are represented graphically in the following 

 curves (Fig. 21). 



12 

 10 



z 



S 6 







\ 



\ 



FIG. 21. Curve of secretion of gastric juice after a meal of meat. 



Two experiments. 



(Copied from PAWLOW: Work of the Digestive Glands. Trans, by 

 THOMPSON, London, 1902, p. 23.) 



PAWLOW and CHIGIN'S miniature stomach allows also a 

 study of the qualitative variations in the gastric juice under 



