MANUAL OF OATTLE-FEKDIN-G, 



183 



Produced. . 

 From food. 



Fat formed in body 



Protein available for fat production. 

 Available protein x 0. 514 =: 



Protein. 

 Kiios. 



1.2425 

 11.3486 



10.1011 



Fat. 

 Kilos. 



6.1398 

 0.5748 



5.5050 

 5.1920 



The result is exactly the opposite of that previously ob- 

 tained. The difference is too small to prove a formation 

 of fat from carbhydrates, more especially as a participation 

 of the amides in fat-building is not altogether impossible, 

 but it deprives the experiment of all value as a proof that 

 carbhydrates do not furnish material for fat. 



Some late feeding experiments on swine by E. v. Wolff,^ 

 at Ilohenheim, have also given results which seem to show 

 quite plainly a formation of fat from carbhydrates. A gain 

 of 100 pounds was made from an amount of fodder contain- 

 ing from 47.1 to 71.4 lbs. of digebtible protein, and from 

 1.6 to 3.6 lbs. of digestible fat. The larger of these quan- 

 tities could yield, at most, 40.2 lbs. of fat, while, according 

 to Lawes & Gilbert, 100 lbs. increase would contain at 

 least 70 lbs. of fat. 



Experiments on Dogs.— In regard to the dog, we can 

 assert that in no case is the assumption of a formation of 

 fat from carbliydrates necessary. As has already been 

 mentioned, large (jnantities of fat may be deposited in the 

 body from the fat or the albuminoids of the food ; but 

 in twenty-two respiration experiments made by Petten- 



* Lciudw. Jalirbaclior, VIII., I. Supplement, 2o8. 



