Nov. 15,1925 Net Energy Values of Alfalfa Hay and Alfalfa Meal 991 
Table IV .—Balance of matter and energy per day and head —Continued 
Period IV 
Period VI 
Dry 
matter 
Water 
Nitro¬ 
gen 
Carbon 
Energy 
Dry 
matter 
Water 
Nitro¬ 
gen 
Carbon 
Energy 
Income: 
Alfalfa meal. 
Grams 
5,407.8 
Grams 
4,607.0 
12,000.0 
Grams 
133.6 
Grams 
2,442.8 
Calories 
23,652.1 
Grams 
3,154.9 
Grams 
4,346.0 
4,250.0 
Grams 
78.0 
Grams 
1,425.1 
Calories 
13,798. 6 
Water_ 
Total_ 
5,407.8 
2,280.5 
524.5 
105.2 
16,607.0 
9,168.0 
5,804.4 
133.6 
36.8 
90.7 
2,442.8 
1,062.8 
131.4 
78.7 
23,652.1 
10,255. 5 
«1,331.6 
1,403.8 
3,154.9 
1,221.3 
288.1 
69.0 
8,596.0 
4,583.0 
3,752.3 
78.0 
18.9 
58.3 
1,425.1 
563.3 
102.6 
51.6 
13, 798. 6 
5,444.8 
*846.7 
920.1 
Outgo, Group I: 
Feces_ 
Urine__ 
Methane_ 
Total_ 
12,990.9 
10,661. 2 
60.7 
7,211. 6 
6,587.0 
60.7 
Metabolizable 1 
Outgo, Group II: 
Hair and brush- 
ings_ _ 
12.7 
4,004.1 
1.1 
1.0 
1,092! 0 
12.7 
2,694. 7 
1.1 
1.0 
5.5 
734.9 
Carbon dioxide 
Water vapor_ 
3,791. 5 
-2,158.0 
2,391.9 
-2,132.3 
Body balance's: 
Water.. 
Protein_ 
+30.6 
+73.7 
+5.1 
+16.1 
+56.3 
*+136.4 
+699.7 
9,764.4 
9,697.6 
-1.2 
-42.1 
0.2 
0.6 
32.2 
«—5.3 
—399.5 
Fat__ 
Computed heat_ 
i 
6,931.1 
6,795.0 
Observed heat_ 
| 
« Corrected to nitrogen equipment. 
The balances of protein and fat reflect the differing intake of feed 
in a generally consistent manner, but the losses of protein in Periods 
V and VI are not as nearly alike as might have been anticipated. 
The data representing the balance of energy in the several periods 
are presented, for reference, in Table IV, but the significance of the 
figures, in comparison, is more readily apparant in another arrange¬ 
ment, and will be discussed in connection with Table VII. 
HEAT PRODUCTION 
The observed heat production (Table V) is the measured heat 
emission corrected for gain or loss of actual heat in body gain or loss 
and for loss of heat in excreta. 
Table V .—Observed and computed average daily heat production 
Observed 
heat 
Computed 
heat 
Apparent 
error 
Computed, 
as per cent 
of observed 
Period I_ 
Calories 
11,088.5 
9,723.3 
7,303.7 
10,886.0 
9,697.6 
6,795.0 
Calories 
11,146.9 
9.801.1 
7.114.2 
10,745.0 
9,764.4 
6,931.1 
Calories 
+58.4 
100.5 
Period III...... 
+77.8 
—189.5 
100.8 
Period V_-_ 
97.4 
Period II..... 
—141.0 
98.7 
Period IV..... 
+66.8 
100.7 
Period VI_ 
+136.1 
102.0 
The accuracy of this observed heat production may be confirmed 
by indirect computation—subtracting from the gross energy of the 
feed the determined energy of the excreta (urine, feces, and com¬ 
bustible gases), and the energy of the body gains, as computed 
from the balances of carbon and nitrogen. Such a comparison of 
