THE RELATIONS OF METABOLISM TO FOOD-SUPPLY. 175 
protein of the ration being varied from 184 grams to 841 grams per 
day. During this time she gained 33 pounds in weight, and her 
whole appearance was such as to negative the assumption of any 
considerable loss of body fat. In the second experiment one cow 
was fed a ration poor in fat, one a normal ration, and one a ration 
unusually rich in fat, the protein supply being again varied through 
a considerable range. As in the previous case the gain in weight 
and the general condition of the cows forbade the assumption that 
body fat was drawn upon to any material extent. In all instances 
except the last a considerable formation of fat from carbohydrates 
was shown. 
The following table gives the more important data of the above 
experiments: 
Proven Equiva- | Fat of a Fat, 
Experimenter. Animal. Moeta- lent Fat,| Food, oe Actually 
‘ bolism, Grms. | Grms. Proteids, produced. 
Grms. Grms. Grms. 
Henneberg, Kern, & 
Wattenberg ......... Sheep 9,284 | 4,772 | 2,100 oe as 
. 3,463 | 1,779 | 300 | 2,0 
Soxhlet: <a veciewe wes aye Swine { 7'169 3'685 340 4025 22,180 
an 5,934 | 3,050 | 656 | 3,706 | 8,5 
Tschirwinsky .......... Swine | 2’361t| 1,213 | 203°| 1/416 | 5/429 
1,054 3831f| 222 605 387 
1,049 Seat 221 602 ee 
785 286t| 205 491 
Schulze ..........0000. Geese 4 785 2861] 205 491 612 
555 194f| 203 397 492 
q 555 194t} 203 397 471 
110 55 20 75 269 
Chaniewski....:....... Geese 203 105 32 137 640 
100 51 9 60 445 
59 days 15,109 | 7,766 | 1,490 | 9,256 | 17,585 
Jordan: <74 “ ....| Cows 4 | 34,661 | 17,816 | 2,211 | 20,027 | 37,637 
Ay 2,209 | 1,131 | 1,504 | 2,635 3,289 
In view of the extreme assumptions made in these computations 
as to the possible contribution by the proteids and fat of the food 
* Digested protein of food less gain of protein by the animal. 
} In original 2572 grms. 
{ Computed on a different basis from the other experiments Compare 
loc. cit., p. 84. 
