Dec. 3,1917 
Fatness of Cattle and Feed Utilization 
457 
Table IX.— Average losses of chemical energy and metabolizable energy 
Gross 
energy per 
kilogram 
of dry 
matter. 
Losses of 
chemical 
energy per 
kilogram 
of dry 
matter. 
I Metabolizable energy. 
Item. 
Per kilo¬ 
gram of dry 
matter. 
Per kilo¬ 
gram of 
digestible 
organic 
matter. 
Total ration: 
Calories. 
Calories. 
Calories. 
Calories, 
Period 1 . 
4,488 
1,739 
1,693 
2,749 
3 > 720 
3,856 
Period 2 . 
4,470 
2,995 
Period 3 . 
4,481 
1,670 
2,811 
3,886 
Period 4. 
4,478 
1,728 
2,749 
3 , 7*9 
Average. 
4 , 478 
1,699 
2,779 
3,820 
Assumed for hay. 
Computed for concentrates: 
Period 1 . 
4,334 
2 , 39<5 
1,938 
3,507 
4,562 
I, 401 
3, ifi i 
3,785 
Period 2. 
4,537 
i >334 
3,203 
3,980 
Period 3. 
4,554 
1, 300 
389 
3,253 
4,014 
3,788 
Period 4. 
4,548 
3,159 
, Average. 
4 ? 549 
1 >343 
3,206 
3,925 
BODY INCREASE 
From the income and outgo of nitrogen and carbon recorded in the 
tables of the Appendix the amounts of protein and fat stored in the body 
may be computed upon the usual assumption that the stock of carbo¬ 
hydrates in the body remained substantially unchanged. The average 
results for the four periods are contained in Table X. 
Table X.— Daily gains of protein and fat 
Period No. 
Protein. 
Pat. 
Total 
organic 
matter. 
I. 
Grams. 
14. 4 
120. O 
IO7.4 
- 51-0 
Grams. 
89. O 
822. 0 
615.9 
- 28.3 
Grams. 
103.4 
942. 0 
723-3 
~ 79-3 
2. 
2 . 
4 . 
The rations of periods 1 and 4, as intended, were approximately 
maintenance rations. Those of periods 2 and 3 were sufficient to support 
a tolerably rapid fattening. As appears from Table 8 of the Appen¬ 
dix, the measured gain of energy differed from that computed from the 
gains of protein and fat, being greater in every instance. The conclu¬ 
sions of subsequent paragraphs are based on the energy balances cor¬ 
rected to 12 hours' each standing and lying, but the results for protein 
and fat may serve as the basis for some approximate comparisons. If 
