92 DIGESTION AND RESORPTIOX 



sight or smell of the food was observed. The figures 

 are given in the table below, in which the mean 



DIGESTION OF FLESH INTRODUCED PER FISTULAM, 600 GRAMMKS 



values from series i. and n. are compared with values 

 calculated from the hypothesis that the concentration 

 of pepsin in the content of the stomach, in accord- 

 ance with some experiments of KIIIGINE and LOBA- 

 SOFF, is proportional to the lapse of time from the 

 beginning of the digestion. The agreement is nearly 

 perfect, and gives a strong support to the said assump- 

 tion. The figures for chewed flesh are written in 

 brackets. It is easily seen how much more rapidly 

 the digestion proceeds in this case. This depends 

 upon the secretion of gastric juice caused by the 

 psychical influence induced by the chewing. The 

 secretion begins about ten minutes after the food 

 has been given to the dog. 



The secretion of pancreatic juice shows the same 

 regularity as that of gastric juice. DOLINSKV intro- 

 duced 250 cc. of hydrochloric acid of different con- 

 centrations into the stomach of a dog and found that 



