APPETITE JUICE. 



HALF-HOURLY PERIODS. 

 123450789 10 LI 12 



In the curve which follows, only the variations of digestive power 

 are represented. 



It is clear that the increase, both of digestive power and of juice 

 volume, is connected with the act of taking in food. 



It appeared of interest definitely to determine the volume and 

 properties of the secretion called forth by the act of eating in the 

 dog with the isolated stomach. We 

 endeavoured, therefore, at the be- 

 ginning, to imitate the conditions of 

 sham feeding as they occurred in 

 the case of the dog with divided 

 (esophagus. In addition to the 

 fistular orifice leading into the iso- 

 lated miniature stomach, another 

 was opened into the main portion 

 of the organ. If we now fed the 

 dog in the ordinary way with small 

 pieces of flesh, these were received 

 back ngain at the orifice of the latter 

 fistula, covered with saliva. Pre- 

 cisely as in sham feeding, after five 

 minutes the juice began to flow simul- 

 taneously, from both the large and 



small stomachs. The secretion ran a corresponding course in the two 

 cavities and ceased at the same length of time in both after the 

 administration of food was stopped. Here is an instance taken from such 

 an experiment performed by Dr. Lobassoff. 



In five minutes the dog had eaten eighty pieces of flesh (weighing 

 172 grms.), all of which soon afterwards dropped out at the fistula. 

 The secretion began in both stomachs after the lapse of seven 

 minutes from the commencement of the feeding, and proceeded as 

 follows : 



5-0 



4-0 



3-0 



i-o 







FIG. 11. Curve of digestive power 

 constructed from the foregoing table. 



