94 DIGESTION AND RESORPTION 



duodenum. The fluid moved down by the peris- 

 taltic movement to a fistula in the jejunum, 15 metre 

 distant from the first one, and was collected through 

 it. After ten to fifteen minutes the whole fluid had 

 passed and was introduced again through the duo- 

 denal fistula. The whole experiment lasted in most 

 cases two hours. At the end the concentration had 

 decreased, from which the resorbed quantity was 



Fig. 24. 



calculated. For the calculation of the regularities 

 the mean concentration has been used. As is seen 

 from the diagram, Fig. 24, in which the square root 

 of the mean concentration is taken as abscissa 

 and the resorbed quantity as ordinate, these two 

 quantities are nearly proportional to each other. 

 The few experiments with 500 and 800 cc. seem 

 to indicate that at constant concentration the re- 

 sorbed quantity is proportional to the volume of the 



