

Increasing Quantities of Fat in Diet on Metabolism in Dogs. 279 



during the first two days was 96 c.c. and 85 c.c., with a specific gravity 

 of 1026 and 1030. The quantity of nitrogen in the urine fell very 

 considerably to 2 '42 2 and 2-408 grams, while the quantity of faeces 

 -also was not very high, being 64*55 to 54*20 grams. The nitrogen in 

 the faeces was lower than in the former period, being only 0*743 and 

 0-468 gram. The quantity of fat found was somewhat greater, being 

 0-936 to 0-701 gram. 



We now come to consider Table VIII, in which are given the 

 averages of the results obtained from these last two dogs, in which 

 the large intestine had been entirely removed. 



In dog 4 the quantity of urine during the two periods in which 

 "9*71 grams of fat were given varied very considerably, being 191 and 

 341 c.c. respectively; and the specific gravity also varied, being 1025 

 and 1014. At the same time the quantity of nitrogen in the urine 

 during these two periods remained pretty much the same, being 4*445 

 and 4-374 grams. The nitrogen in the faeces also remained constant, 

 being 1*064 and 1-081 grams, ttie fat being 0*777 and 0*605 gram. 



We see, comparing these with the normal dog on the same quantity 

 of fat, that the quantity of faeces is very much larger, in fact nearly 

 double the quantity found in the normal dog on practically the same 

 diet, and at the same time the nitrogen in the faeces is increased, being 

 more than double, or at any rate double the quantity in a normal dog, 

 whereas the fat in the faeces is practically the same as in a normal dog 

 on a diet containing this amount of fat. 



As far as the absorption of proteids is concerned it is 84*36 and 

 84*11 per cent., while in a normal dog we find that on this diet roughly 

 92*71 and 91*29 per cent, was absorbed, and in the dog in which the 

 large intestine was partially removed 86*91 and 89*85 per cent, was 

 absorbed. We may, therefore, take it that this dog shows a still 

 greater decrease in the absorption of nitrogen than after the partial 

 removal of the large intestine, and that the absorption of nitrogen is 

 very much influenced by the absence of the large intestine. 



During the next two periods 29*71 grams of fat were taken, and the 

 animals increased in weight during these two periods, also the quantity 

 of urine varied very considerably, being 207 and 198 c.c., with a 

 specific gravity of 1019 and 1023. 



The quantity of nitrogen excreted in these two periods was 3*243 

 and 2*965 grams, so that the increase of fat caused a decrease in the 

 quantity of nitrogen in the urine ; that is to say, a proteid sparing 

 influence, the same as in the normal dog. As far as the urine is con- 

 cerned, and comparing these two periods with the former two periods, 

 it would seem as if the quantity of water absorbed is decreased by the 

 increased quantity of fat. At the same time this is not at all so well 

 brought out as in the case of the normal dogs, or even in the dog with 

 partial removal of the large intestine. 



