THE WORK OF THE DIGESTIVE GLANDS. 



The progress of juice secretion in the above is also represented in 



the following curves : 



Hours I234I234-I23I234 



12 



o 

 " 



\ 



S] 



A BCD 



FIGS. 14-17. A. Ordinary curve of gastric secretion (200 grms. flesh). 



B. Curve from direct introduction of food (150 grms. Hush). 



C. Sliam feeding with same. D. Summation of B and C. 



As you see, the curve which represents the results of the direct 

 introduction of flesh, ascends much more slowly and does not attain any- 

 thing like the height of that caused by normal feeding with the same 

 food. But if the quantities obtained by direct introduction of the flesh 

 be added to those of sham feeding the resulting curve is almost identical 

 with the normal. 



In like manner the digestive power of the secretion in the foregoing 

 experiments can be dealt with, and with the same result. It is a good 

 instance of how a secretion curve can be synthetically constructed 

 from its constituent factors. 



Finally, I am able to demonstrate to you the following instructive 

 experiment. In the presence of some of my listeners, whom I had 

 invited to attend an hour before the lecture, I carried out the following 

 procedures on two dogs, both of which had ordinary gastric fistuL-e and 

 were, besides, oesophagotomised. Into the stomach of the one, while 

 its attention was distracted by patting and speaking kindly to it in 

 order to avoid arousing any thoughts of feeding, a definite number of 



