MILK PRODUCTION AND BODY INCREASE OF DAIRY COWS 
19 
cent less than according to method 1, and that the amount by method 3 
is reduced by about 2 per cent additional. Reckoned as per cent 
of the digestible, however, the metabolizable energy, according to 
methods 2 and 3, will show higher figures than by method 1. 
Table 14 (Part 1). — Data incident to computation of metabolizable energy 
Cow Xo. 
Chemical energy 
Corrections to excre- 
tory energy for 
protein 
Period 
Feces 
Urine 
B rush- 
ings 
Heat of 
Body 
Methane 
fermen- 
gain or 
tation 
loss 
Calories 
Calories 
Calories 
2, 628. 
3, 455. 6 
-29.8 
2, 522. 5 
3, 316. 9 
-44.7 
2, 419. 5 
3, 181. 5 
+143. 8 
2, 404. 6 
3.161.8 
+25.3 
2, 420. 1 
3. 182. 2 
-8.9 
2. 457. 3 
3, 231. 1 
-52.9 
2, 792. 
3,671.2 
+70.8 
2, 835. 2 
3, 728. 
+13.4 
Milk 
631 \i 
615 | 
579 || 
I 
II 
III 
I 
II 
III 
I 
II 
Calories 
10, 820. 6 
11,026.0 
10, 702. 9 
11,397.3 
11,076.7 
11.125.3 
11,459.0 
11, 655. 5 
Calories 
1, 583. 8 
1,691.1 
1, 431. 8 
1,323.4 
1,400.3 
1, 406. 3 
1, 487. 2 
1,611.3 
Calories 
110.1 
78.3 
93.7 
107.5 
87.6 
89.1 
70.2 
87.7 
Calories 
+285.0 
+50.7 
(Dry) 
+331. 9 
+360.1 
+344.6 
+366. 5 
+367. 9 
Metabolizable energy 
Cow Xo 
Calories 
13, 609. 3 
13, 723. 2 
14, 218. 4 
14, 759. 2 
14, 890. 7 
14, 730. 5 
16, 845. 7 
16, 492. 4 
Table 15. — Comparison of two methods of computation of metabolizable energy 
Cow Xo. 
Usual method 
Period i Total energy 
Digesti- 
ble 
Metabo- 
lizable 
Digesti- 
ble 
energy 
metabo- 
lizable ! 
Improved method 
Total energy 
Digesti- 
ble 
energy 
energy 
Digesti- Metabo- metabo- 
ble 2 ; lizable 3 ' lizable * 
631. 
Average . 
615. 
Average- 
Average. 
I 
II 
III 
Per cent 
66.67 
I 
II 
III 
Per cent 
53.44 
Per cent 
80.16 
Per cent Per cent ! Per cent 
47. 92 ! 42. 80 ! 89. 31 
65.93 
66.75 
52.81 
54.05 | 
80.10 
80.97 
47.89 
49.35 
42.56 | 
44.17 
88.87 
89.50 
66. 45 
53.43 ! 
80.41 
48.39 
43. 18 
89.23 
65.99 
66.84 
66.62 
54.47 
55. 15 
54.92 
82.54 
82.51 
82.44 
49.38 
50.07 
49.56 
45.03 1 
45. 62 | 
45.23 \ 
91.19 
91.11 
91.26 
66.48 
54. 85 
82.50 
49.67 
45.29 
91.19 
68.83 
68.32 
56.80 ; 
55.96 1 
82.52 
81.91 
51.25 
50.48 
46.82 
45.83 
91.36 
90.79 
68.58 
58.38 
82.22 
50.86 
46. 33 
91.08 
• From "Metabolizable energy," method 1, Table 14, and "Digested Calories," method 1, Table 9, 
2 From Table 9, method 3. 
3 From "Metabolizable energy." method 2, Table 14, and "Gross energy of feed," Table 14. 
• From "Metabolizable energy," method 2. Table 14. and "Digested Calories," method 3, Table 9. 
