of Fat in the Alimentary Canal. 



263 



This result may not be due entirely to the breaking up of the fat 

 in the small intestine, but to the increased out-put of fat acids from 

 the stomach. The soaps equalled 6*04 per cent, of the total fat 

 present in the small intestine, although the actual quantity was only 

 028 gram. 



In the large intestine the quantity given in the table was not only 

 that which was present in the intestine after death, but also that 

 which was collected in the faeces, passed during the last hour or so 

 of life. It contained 1672 grams of fat, of which 0S6S gram were 

 in the form of neutral fat, and 0*990 had been broken up into free 

 fat acids. So that 5921 per cent, of the total fat was in the form of 

 fat acids, and 39 - 95 per cent, only as neutral fat. 



The soaps were not very much increased, the total quantity being 

 only 0*014, that is to say 0'84 per cent. 



Summary. 



When we come to compare the results found in the normal dogs 

 during the absorption of milk fat with that in the dogs in which the 

 pancreas has been" removed, we see that there is not such a great 

 difference as one would be led to suspect by the old teaching of the 

 fat splitting action of the pancreas. 



For the purpose of comparison it will be better to tabulate the 

 average results of the preceding experiments so that the normal 

 results may be more readily compared with those in which the pan- 

 creas had been previously removed. In this way it is easy to detect 

 any real difference in the percentage quantities in the alimentary 

 canal. 



Table VIII. — Comparing the Percentage Composition of the Fats in 

 the Different Parts of the Alimentary Canal on a Milk Diet, of 

 Normal Dogs (A) with those in which the Pancreas (B) had 

 been previously removed. 





Neutral fat. 



Free fat acids. 



Fat acids as soap. 



Normal. 

 A. 



Pancreas. 

 B. 



Normal. 

 A. 



Pancreas. 

 B. 



Normal. 

 A. 



Pancreas. 

 B. 



77-54 

 24-67 

 34-17 



68-17 

 32-59 

 33 -27 



18-50 

 72-22 

 58-65 



31 -29 

 61-62 

 53 -32 



0-63 

 3 -14 

 7-19 



0-55 

 5-79 

 13 -41 



Small intestine. . . . 

 Large intestine. . . . 



The average number of cases in the above Table VIII is three in 

 each column, except in that of the large intestine of the normal dogs, 



