Increasing Quantities of Fat in Diet on Metabolism in Dogs. 273 



tity, 1*217 grams, in the first period was increased to 1*437 grams, 

 when the diet contained 36*73 grams of fat, and on increasing the diet 

 to 51-73 grams of fat, it rose to 1'492 grams. 



When we compare this to what we find in normal dogs, we see the 

 total quantity of fat daily eliminated was really higher than what 

 occurred in the normal dogs, for in dog 1, on practically the same diet, 

 the quantity of the three periods (), (b), (c) was 0*733, 0*971, and 0*264 

 gram. 



We now turn to the table of absorption. On the diet containing 

 11*73 grams of fat, the nitrogen absorption was 86*91 per cent, as 

 against in the normal dog 92*71 per cent. On increasing the fat to 

 36*73 grams the nitrogen absorption rose to 89*85 per cent. On. 

 increasing the amount of fat in the diet to 51*73 grams it fell slightly 

 to 89-69 per cent., while the corresponding absorption in the normal 

 dog was 91*25 and 90*26 per cent. From this we see that on com- 

 paring the two animals together, we have a slight decrease in the 

 percentage of absorption of proteids from the alimentary tract caused 

 "by partial removal of the large intestine. It also follows that contrary 

 to what one finds in normal dogs, namely, that on increasing the fat in 

 the diet there is an apparently decreased absorption, one finds in the 

 dog from which the larger part of the large gut has been removed, on 

 the other hand, an increased absorption of nitrogen. 



Turning now to the fat, the average for which the periods (a) and (c) 

 is not complete, for the whole period analysed it appears that 86* per 

 oent. of the fat is absorbed as against 93 per cent, in the normal dog, 

 while when the fat is increased 96*09 per cent, is absorbed in period 

 (b) and 97 per cent, in period (c). So that while it is seen that on 

 Increasing the fat the percentage absorption is increased as in the 

 normal dog, at the same time it must be noted that with a small fat 

 diet the absorption appears to have been less than normal, although 

 this may not be quite correct, since the average, as already stated, is 

 not for the total period. 



On the increased fat in the diet of stage (b) the percentage absorp- 

 tion of fat practically corresponds to what one finds in the normal dog, 

 In this case being 96*09 per cent.- and again when the fat was in- 

 creased to 51*73 grams, the absorption rose to 97 per cent., the corre- 

 sponding figure in the normal dog with 62*04 gram's of fat being 97*96 

 per cent. 



It may therefore be considered that after partial removal of the 

 large intestine the influence on general metabolism, as indicated by the 

 urine, is very little ; that increasing the fat in the diet causes, as in the 

 normal dog, a steady decrease in the quantity of urine, and also causes 

 & sparing of nitrogen to the body, and therefore decrease of nitrogen 

 in the urine. 



* This figure is probably too low. See Table V. 



Y2 



