Sept. 1,1915 
Net-Energy Values of Feeding Stuffs 
473 
per kilogram of dry matter. Of these, the one obtained by com¬ 
parison of the greatest and least amounts of feed (periods 2 and 3)— 
namely, 1,319 calories—is considered as the average m the computation 
of the average net-energy value by the current method. 
Attention is called to the fact that the heat-increment values as 
shown in Tables III and IV are different from those which have been 
P ublished (5). This is the result of the use of revised figures for 
eat production as previously noted (see footnote to Table II). 
Table III .—Computation of heat increment per kilogram of timothy hay 
Period No. 
Quantity 
of dry 
matter 
eaten 
Heat 
produc¬ 
tion 
Period 4____________ 
Kgms. 
4.8920 
2.9742 
Cals. 
9,501 
7,780 
Period 3......... __ 
Difference_________ 
1.9178 
1,721 
897 
Difference per kilogram of dry matter......... 
Table IV .—Computation of heat increment per kilogram of grain mixture 
Period No. 
Quantity of dry 
matter eaten 
Heat 
produc¬ 
tion 
Hay 
Grain 
Period 1 ___ ...____ 
Kgms. 
2.9349 
2.9742 
Kgms. 
1.9962 
Cals. 
10,171 
7,780 
Period 3 _ _ _ _ _ 
Difference_________ 
0393 
1.9962 
2,391 
-35 
2,426 
« 1,215 
Difference due to hay___ 
Difference due to the grain. __ 
Difference per kilogram of grain..... 
Period 2 . .... . . .. .. 
2.9487 
2.9349 
4.7590 
1. 9962 
14,035 
10,171 
Period 1 ______ ___ 
Difference.___^____ 
.0138 
2. 7628 
3,864 
12 
3,852 
1,394 
Difference due to hay_____ 
Difference due to 2.7628 kilograms of grain....... 
Difference per kilogram of grain_~_____ 
Period 2 _________ 
2.9487 
2.9742 
4. 7590 
14,035 
7,780 
Period 3_________ 
Difference_ _ 
0255 
4.7590 
6,255 
-23 
6,278 
* 1,319 
Difference due to hay___ _ 
Difference due to the grain____ 
Difference per kilogram of grain_____ 
• The same value will be obtained by comparing periods 1 and 4. 
* The same value will be obtained by comparing periods 2 and 4. 
COMPUTATION OP THE AVERAGE METABOLIZABLE-ENERGY VALUE OF THE HAY 
AND OF THE GRAIN 
The total metabolizable energy of each hay ration is divided by 
kilograms of dry matter. The results are metabolizable-energy values 
per kilogram of dry matter. These values for the timothy hay are 
(as in Table II) 2,096 Calories and 2,076 Calories for periods 3 and 4, 
respectively. The average of these—namely, 2,087 Calories—repre¬ 
sents the average metabolizable-energy value of the hay used in 
the experiment. 
63338—25t-6 
