78 



THK WORK OF THE DIGESTIVE GLANDS. 



or quantity of juice (with flesh, decrease of digestive power; with bread, 

 decline in the quantity of juice) which sets in soon after the taking of 

 food, indicates that the two conditions are connected with the inge.stion 

 of food i.e., with a transitory factor which soon passes away and gives 

 place to other conditions. Our explanation becomes still more convinc- 

 ing when we take into consideration the effects of other foods. If you 

 give the dog, for example, something else to eat w Inch does not interest 

 it to the same degree as flesh or bread, you will find the initial increase 

 in quantity and strength of juice does not appear. Offer the animal 

 milk, for example, which in sham feeding, especially if it does not last 

 long, calls forth, as a rule, no secretion, or at all events only very little, 

 and the rapid flow of the commencement the already-mentioned initial 

 rise absolutely fails to appear. You have already seen the figures 

 which deal with this matter ; I think it necessary, however, to bring 

 them forward again in order that you may be better able to compare 

 them with the secretion after flesh and bread. 



The dog was given 600 c.c. of milk (experiment by Dr. Chigin). 



Hour. 

 1st 

 2nd 



Quantity of juice. 



4'2 c.c. 

 12-4 



Digestive power. 

 3'57 mm. 

 2-03 



We have now begun the analytical examination of the variations of our 

 secretory curve. But owing to the importance of the matter, we did not 

 confine ourselves to conclusions which might be drawn from earlier investi- 

 gations. We turned to new forms of experiment for further proof. 



Thus we divided the ordinary ration of flesh given to our dogs 

 400 grms. into four equal parts, which were administered at intervals 

 of an hour and a half. (Experiments by Privat decent Kotljar and 

 Dr. Lobassoff.) Each time after the dog received its 1 00 grms. of flesh 

 we were able to detect a rise both in the quantity and in the digestive 

 power of the juice. The following table shows the figures in question : 



