Dec.-3» 1917 
Fatness of Cattle and Feed Utilization 
459 
Table XII. —Paths of heat emission 
Period No. 
Radiation 
and con¬ 
duction. 
Latent heat 
of water 
vapor. 
I . 
Per cent. 
75.88 
5 2 - 4 i 
54 - 2 3 
68.27 
Per cent. 
24. 12 
47 * 59 
45*77 
3 i* 73 
2. 
7 . 
4. 
Applying to the figures for heat emission the necessary corrections for 
the gain or loss of matter by the body and for the fluctuations of body 
temperature yields the results for heat production contained in Table 
8 of the Appendix, while, in order to render the several periods compar¬ 
able, a further correction to uniform standing and lying must be made, 
the corrected results being recorded in Table 9. The average daily heat 
production of the >animal, corrected to a uniform period of 12 hours 
standing and 12 hours lying, as in our earlier experiments, was: 
Period 1..•.10,905 Calories. 
Period 2.16, 511 Calories. 
Period 3. . ..19,992 Calories. 
Period 4.14,095 Calories. 
ENERGY EXPENDITURE CONSEQUENT ON FEED CONSUMPTION 
The foregoing results show the same marked increase in heat produc¬ 
tion which has been uniformly found to follow an increase in the ration. 
From a quantitative comparison of the corresponding periods the energy 
expenditure per unit of total feed (hay and concentrates) consumed may 
be computed in the case of the unfattened and fattened animal, respec¬ 
tively. The results of this computation are contained in Table XIII. 
For £he reasons stated in a previous paper (2, p. 471) no attempt has been 
made to correct these results for the differences in live weight. 
Table XIII .—Energy expenditure per kilogram of dry matter of total ration 
Condition and period No. 
Dry matter 
eaten. 
Heat pro¬ 
duction. 
Unfattened: 
Period 2. 
Grams . 
9, 146. 3 
4 , 462. 9 
Calories. 
16,511 
10, 9 °s 
Period 1. 
Difference. 
4,683.4 
5,606 
1.197 
Difference per kilogram of dry matter. 
Fattened: 
Period 3. 
9,911.6 
5> 2I 5- 6 
19, 992 
14 , 095 
Period 4.. 
Difference. 
4, 696. 0 
5,897 
1,256 
Difference per kilogram of dry matter. 
