THE Ml I 11 \\l- \l- OF l»I(il sTION 





on account of the crossing and foreshortening of the loops, etc., I \ 

 their constancy testifies, there is no doubt thai the resnll atly 



close for the purpose of finding oul how quickly 

 small intestine; and the method lias a greal advant • 



in thai digestion is allowed to pr sed practically without interruption. 



The points we have to determine are: 1 I when the food ti 

 stomach; (2) the rate a1 which differenl foods are dischar 

 time required for the passage through the small intestii 



Let us consider firsl of all the results obtained I oith pr 



tically pure fat or carbohydraU or protein. By plotting 

 the shailows in centimeters along the ordinates, with I ■ the 



abscissa?, curves such as those shown in Pig. 159 have been 

 When fats were fed (dash line in charl . the discharge begai 

 slowly, and continued at a slow rate. Even aft en hour- 



still remained in the stomach, and a1 no time was any large quanl I 



40 



30 



8 



u 

 & 



<D 



.§20 



9 



a 



to 



O 



10 



h 1 



3 4 



Hours 



Fig. 159. — Curves to show the average aggregate length of the 



intestine at the designated intervals . The I 



dash line, f"r protein foods in the heavy li: 

 I Prom Cannon.) 



present iii the intestine, indicating thai almosl as quickly as it is • 



charged into this pari of the gastrointestinal tract h 



and absorbed. The discharge of carbohydrates was quite differenl 



line in charl ) ; it began often in ten minut 



reaching a maximum, as a rule, at the end of two hours 



fell off, the stomach being empty in aboul three hour- P 



rate intermediate between that for fats and tl I 



heavy line . Little lefl before the firsl half hour; the 

 slowly rose, attaining a maximum in about tour 1 

 ally declining at aboul the Bame rat II is 



that at the end of half an hour aboul eighl tin much c 



had left the stomach as protein; at tl i ei d o! 



These results are clearl) dependent up lif- 



t'ereiit foodstuffs assume an acid reaction in the stomach I irbohyd 



