480 
Journal of Agricultural Research 
Vol. XXXI, No. 5 
It will be noted that the computation of the net-energy values 
of the homing feed by the new method did not involve, in this case, 
the computation of a heat-increment value for hominy feed alone. 
The fact that the hay and the hominy feed were fed in a definite 
proportion eliminated, the necessity of such a computation, inas¬ 
much as the heat increment of the mixed ration of the hay and 
hominy feed could be made use of directly in determining the value 
for maintenance in the periods in which the mixed ration was fed 
(periods 2 and 3, Table XI). 
The net energy of the hominy feed computed by this method are 
2,489 Calories, and 2,454 Calories per kilogram of dry matter, for 
periods 2 and 3, respectively, the average being 2,472 Calories, as 
compared with 2,296 Calories obtained by the current method. 
The net-energy values per kilogram of dry matter of the mixed hay 
are 974 Calories, 1,161 Calories, and 930 Calories, per kilogram of dry 
matter, for periods 1, 4, and 5, respectively, the average being 1,022 
Calories instead of 1,049 Calories as by the current method. The 
considerable deviation of the net-energy value of the hay of period 
4 from the values in the other two periods is rather to be expected, 
since an inspection of the heat-increment values (Table X) indicates 
that the heat production of period 4 is somewhat low for the ration 
as compared with the heat production of the other two hay periods, 
while Table IX shows the metabolizable-energy value in period 4 
to be higher than the values in the other two periods, the effect 
therefore being to make the gains of period 4, and consequently 
the net-energy value of the hay of this period, relatively high. The 
individuality of the data is, apparently, preserved by the new com¬ 
putation of the net-energy values. 
Example 4, from Experiment 212 
Table XIV. —Data for computation of net-energy values of alfalfa hay and alfalfa 
meal 
Period No. 
Animal 
Average 
live 
weight 
Dry matter 
eaten 
Metabolizable 
energy 
Heat 
produc¬ 
tion ° 
Gain of 
energy 
Alfalfa 
hay 
Alfalfa 
meal 
Per kilo¬ 
gram of 
dry 
matter 
Total # 
L___ 
2.. 
3.. 
1___ 
5... 
5___ 
Steer 
H 
H 
H 
H 
H 
H 
Kgms. 
349 
349 
354 
349 
337 
329 
Kgms. 
6.6383 
5.3202 
3.0524 
Kgms. 
6.6707 
5.4078 
3.1549 
Cals. 
2,009 
1,984 
2,002 
1,971 
2,133 
2,088 
Cals. 
13,337 
13,238 
10,650 
10,661 
6,510 
6,587 
Cals. 
11,134 
10,946 
9,843 
9,767 
7,394 
6,868 
Cals. 
+2,203 
+2,292 
+807 
+894 
-884 
-281 
• Revised; see footnote to Table II. 
Table XV .—Heat increment per kilogram of dry matter ° 
Feeding stuff 
Periods compared 
Heat in¬ 
crement 
per kilo¬ 
gram 
Feeding stuff 
Periods compared 
Heat in¬ 
crement 
per kilo¬ 
gram 
Alfalfa hay 
1 and 3__ 
Calories 
980 
Alfalfa meal_ 
2 and 4__ 
Calories 
934 
Do 
3 and 5 . 
1,080 
1,043 
1,034 
_do__ 
4 and 6_ 
1,287 
Do 
1 and 5___ 
_do_ 
2 and 6_ 
1,160 
1,127 
Do__ 
Average of all. 
_do. 
Average of all. 
• Computed from the revised figures for heat production. 
