Dec. 1, 1925 
The Maintenance Requirement of Dry Cows 
1075 
Table XIX .—The observed heat 'production corrected to a standard day of 12 
hours standing and 12 hours lying 
Experiment, animal, and 
period Nos. 
Total heat 
production 
Time standing 
Live 
weight 
Correction of heat 
production for 
standing 
Heat pro¬ 
duction cor¬ 
rected to 
12 hours 
standing 
Total per 
day 
Differ¬ 
ence from 
12 hours 
Per hour 
Total 
Cals. 
Hours 
Hours 
Kg. 
Cals. 
Cals. 
Cals. 
221D-885-I__ 
8,380. 3 
17.7 
-5.7 
415. 2 
27.4 
-156.2 
8,224.1 
II... 
9,607.4 
16.1 
-4.1 
429.7 
27.4 
-112. 3 
9; 495.1 
Ill_ 
8,816.7 
17.8 
-5.8 
426.4 
27.4 
-158.9 
8,657.8 
221D-886-I_ 
8,058.6 
11.0 
+1.0 
399.8 
26.3 
+26.3 
8,084.9 
II__ 
10,474.5 
9.2 
+2.8 
424.4 
27.4 
+76.7 
10, 551.2 
III_ 
7,914.1 
7.9 
+4.1 
420.2 
27.4 
+112. 3 
8,026.4 
221E-8S5-I-... 
9,721. 7 
19.4 
-7.4 
443.1 
28.5 
-210.9 
9,510.8 
II_ 
8,735.5 
18.3 
-6.3 
434.4 
27.4 
-172.6 
8,562.9 
221F-874-I_ 
10,964. 2 
11.9 
+0.1 
428.8 
27.4 
+2.7 
10; 966.9 
II.. 
9,076.8 
11.4 
+0.6 
415.6 
27.4 
+16.4 
9,093.2 
221F-887-I_ 
10, 327. 2 
17.3 
-5.3 
335.2 
22.9 
-121.4 
10,205.8 
II... 
8,395.0 
17.3 
-5.3 
320.5 
22.9 
-121.4 
8,273.6 
THE INCREMENT OF HEAT PRODUCTION DUE TO FEED 
CONSUMPTION 
In the method evolved by Armsby the determination of the net 
energy of the feed calls for the measurement of the increase in heat 
production resulting from the addition of a known quantity of feed 
to a basal ration. To this increase in heat production the term “heat 
increment” has been applied. The data expressing the heat incre¬ 
ments in this study are recorded in Table XX. 
Table XX. — The increment of heat production due to feed consumption, computed 
to the standard day 
Experiment, animal, and 
period Nos. 
Dry 
matter 
eaten 
Heat 
produc¬ 
tion, 
observed 
Experiment, animal, and 
period Nos. 
Dry 
matter 
eaten 
Heat 
produc¬ 
tion, 
observed 
221D-885-II- . 
£g. 
5. 4676 
Cals. 
9,495.1 
Difference __ _ 
Kg. 
2 . 2988 
Cals. 
2,524.8 
I_ 
3.6674 
8,224.1 
Difference per kg. dry 
matt: at 
1,098.3 
1,092.9 
Difference__ __ __ 
1.8002 
1,271.0 
UXUlVVVl — — — — — — — — — — — — 
Average for cow 886 
Difference per kg. dry 
matter,. _ __ 
706.0 
221E-885-I 
4.7012 
3.4475 
9.510.8 
8.562.9 
TT 
221D-885-II 
5.4676 
3.8505 
9,495.1 
8,657.8 
III_ 
Difference 
1,2537 
947.9 
Difference per kg. dry 
matter 
Difference _ 
1. 6171 
837.3 
756.1 
Difference per kg. dry 
matter _ _ _ _ 
517.8 
221F-874-I 
5. 9803 
4,0032 
10,966.9 
9,093.2 
Average for cow 885_ _ __ 
611.9 
II 
221D-886-II _ 
6. 0809 
10,551.2 
8,084. 9 
Difference 
1.9771 
1,873.7 
I _ 
3. 8131 
Difference per kg. dry 
matter 
947.7 
Dl‘ ff AT ATI A A 
2. 2678 
2,466. 3 
iliul Uvl_—-— 
vllvv — — — — — — — — — 
Difference per kg. dry 
matter. . 
221F-887-I... 
5.4183 
10,205. 8 
8,273. 6 
1,087. 5 
II_ 
3. 6274 
221D-886-II _ 
6.0809 
10,551. 2 
8,026.4 
Difference 
1.7909 
1,932.2 
III... 
3. 7821 
Difference per kg. dry 
matter 
1,078.9 
