254 



Dr. V. Harley. On the BreaMng-up 



Table II. — Normal Dog, weighed 12*825 kilos., killed by Chloroform 

 Seven Hours after feeding with Milk. 





Total ether 

 extract. 



Neutral fat. 



Free fat 

 acids. 



Fat acids as 

 soaps. 





Total. 



p.c. 



Total. 



P- 



c. 



Total. 



p. c. 



Total. 



p. c. 





22-806 



100 



22 -050 



96 



•69 



0-744 



3-25 



0-012 



006 



Found in — 























12 -970 



100 



10-522 



81 



•12 



2-436 



18-78 



0-012 



10 



Small intestine. 



0*977 



100 



0-349 



35 



85 



0-608 



62-19 



0-020 



2-06 



Large intestine . 



0-402 



100 

















As regards the free fat acids, the milk given contained 0744 

 gram, i.e., 3'25 per cent, of the total ether extract was obtained as 

 fat acid, which is far more than usual, and is probably in part due to 

 the fact that the milk stood in the laboratory for some time previously 

 to its being boiled for the experiment. 



The stomach contained 2"436 grams of fat acids, i.e., 18' 78 per 

 cent, of the total fat was present in the stomach as free fat acids. 

 The percentage of the neutral fat had diminished, while the percen- 

 tage of the fat acids had increased. The fat acids, combined as soaps 

 in the stomach, remained exactly the same as the quantity originally 

 given, but since the percentage had increased from 0*06 to # 10, it is 

 not at all likely that that alone of the components of the total fat 

 had wholly remained in the stomach, so that we may consider that 

 this case is no exception, and that the stomach formed not only fat 

 acids but also soap. 



In the small intestine only 0*977 gram of fat was found, and since 

 no less than 9*836 grams had passed through the pylorus during the 

 period of digestion, either 8*859 grams had passed on into the large 

 intestine or had been absorbed. The total fat contained only 0*349 

 gram as neutral fat, so that the percentage had fallen to 35*85 per 

 cent, (the milk given contained 96*69 per cent.). The free fat acids 

 amounted to 0*608 gram, that is 62*19 per cent, of the total fat. 



As originally the milk only contained 3*25 per cent, of fat acids, 

 we can conclude that no less than 58*94 per cent, of the neutral 

 fat had been converted into fat acids in its passage as far as the 

 caecum. The fat acids present as soaps had increased to 0*02 gram, 

 which raises the percentage of fat acids present as soaps to no less 

 than 2*06, an amount which closely resembles that present in the 

 foregoing case. 



In the large intustine we unfortunately cannot follow the changes 

 in this experiment, as the neutral fat. and free fat acids and soaps 



