38 o 
Journal of Agricultural Research 
Vol. VII, No. 9 
Table I .—Duration of experiments in igi $, rations fed , and live weight of the animals 
Period 
No. 
Preliminary period. 
Digestion 
period. 
I. . 
II. 
Ill 
IV. 
V. 
Jan. 3-13.... 
Tan. 24-Feb. 
Feb. 21-Mar. 
Mar. 21-31 
Apr. 11-2 r 
3 - 
3 
Jan. 14-23. . . 
Feb. 4-13- • • • 
Mar. 4-13. 
Apr. 1-10. 
Apr. 22-May 1.. 
Ration. 
Clover 
Maize • 
hay. 
meal. 
Gm. 
Gm, 
7, OOO 
4 . COO 
*r, 0 
1,50° 
3,000 
2,500 
5, OOO 
I, OOO 
2 , OOO 
Live 
weight of 
steer. 
Kgm. 
5 * 3-5 
497-2 
4 ^ 9-5 
5 * 3 - 5 
491.2 
The hay used was grown on the college farm and cut when in full 
bloom. It graded as “good hay.” It was fed cut in lengths of 5 to 10 
cm. The maize mpal was ground from No. 2 yellow com. 
EXPERIMENTAL METHODS 
The experimental and analytical methods in these experiments were 
the same as those previously given in detail, 1 with the exception of the 
determinations of carbon and hydrogen. The total carbon in the urines 
was determined directly by combustion of the liquid urine by a method 
worked out in this laboratory 2 and that of the feed and feces by com¬ 
bustion in a bomb calorimeter as described by Fries. 3 The organic 
hydrogen was not determined, as it has been found that the error resulting 
from omitting it entirely from the computation is very small. 
Table II shows the average composition of the dry matter of the 
feeding stuffs used. 
Table II .—Composition of the dry matter of the feeding stuffs 
Feeding stuff and period No. 
Ash. 
Pro¬ 
tein, 
Non¬ 
protein. 
Crude 
fiber. 
Nitrogen- 
free 
extract. 
Ether 
extract. 
Heat of 
combus¬ 
tion per 
kilogram. 
Clover hay: 
I and II.... 
P. ct. 
5 - 3i 
6 . 20 
S- 79 
P. ct. 
8.26 
9-49 
9- 94 
P . ct. 
I. II 
1 - 2 $ 
1-03 
P. ct. 
34.34 
3 1 * 4° 
30. 
P.ct. 
48. 54 
49- 33 
50.14 
P.ct. 
1- 95 
2.34 
2- 55 
Calories. 
4,367 
4, 403 
4, 407 
Ill. 
IV and V. 
Average. 
5- 93 
9- 23 
i- *3 
32 . 10 
. 49- 34 
2 . 28 
4, 393 
Maize meal: 
III. 
1.44 
i-37 
9- 74 
9 . 82 
-35 
. 20 
2 . 04 
2 . 04 
82.-13 
82 . 21 
4-3° 
4-3 6 
4, 5 I 5 
4,496 
IV and V.. 
Average. 
1 . 41 
9.78 
.28 
2 . 04 
82 . 17 
4-33 
■ 4,505 
1 Armsby, H. P., and Fries, J. A. The influence of type and of age upon the utilization of feed by cattle. 
U. S. Dept. Agr. Bur. Anim. Indus. Bui. 128, p. 203. 1911. 
• 2 Braman, W. W. A study in drying urine for chemical analysis. In Jour. Biol. Chem., v. 19, no. i, p. 
X05-113. 1914. 
2 Fries, J. A. The determination of carbon by means of the bomb calorimeter. In Jour. Amer, Chem. 
Soc., v, 31, no. 2, p. 272-278, 1 fig. 1909. 
