3io 
Journal of Agricultural Research 
Vol. VII, No. 7 
Experiment II.— In another similar experiment conducted with three 
sheep and a different sample of vegetable-ivory meal the following diges¬ 
tion coefficients were obtained. With them are compared the results of 
Experiment I as well as the average coefficients for corn meal (Table X). 
Table X. —Comparison of the digestion coefficients obtained in Experiments I and II 
Experiment No. 
Feed. 
Number 
of sheep. 
Dry 
matter. 
Pro¬ 
tein. 
Fat. 
Fiber. 
Nitrogen- 
free 
extract. 
I... 
Vegetable ivory. . 
2 
87 
. 3 ° 
“45 
70 
94 
II. .. 
3 
8l 
6 41 
56 
73 
89 
Average. .. 
84 
36 
5 1 
72 
92 
Com meal (13, p. 
291;). 
88 
67 
90 
92 
a One sheep only. & Different sheep showed variable results. 
Of these figures the first and last two columns demand the most atten¬ 
tion. Corn meal contains nearly as much nitrogen-free extract as the 
vegetable ivory, and it would appear that the percentage digestibility of 
this ingredient in each feed is approximately the same. 
Applying the average coefficients to the composition of the dry matter 
of the vegetable-ivory meal and the average coefficients for corn meal to 
the dry matter contained in the latter 1 and multiplying by 2,000, one 
obtains the following amounts of digestible matter in 1 ton of each of the 
two feeds (Table XI). 
Table XI. —Digestible nutrients (in pounds ) in vegetable-ivory meal and corn meal per 
ton 
Feed, 
Protein. 
Fat. 
Fiber. 
Nitrogen- 
free 
extract. 
Total. 
Vegetable ivory. 
Com meal. 
42 . 34 
147 - 5 2 
6.83 
78.84 
IOI. 08 
I, 582. 20 
I, 486. 40 
17 732 . 45 
1, 712. 76 
On the basis of total digestible organic matter the results indicate that 
the vegetable-ivory meal is equal in feeding value to corn meal. Kellner 
(10) and Armsby and Fries (3, 4, 5, 6) have shown, however, that it is 
not possible to estimate with accuracy, by means of digestion experiments, 
the relative value of different feedstuffs. In view of the excess of fiber 
in the vegetable-ivory meal over that of the corn meal (7 per cent in 
ivory meal v. 2 per cent in corn meal), of the tough horny nature of the 
ivory nut, of the uncertainty of the nutritive value of the mannan as 
compared with starch, and of the unknown influence of the two feedstuffs 
1 Tfce average composition of corn meal on a dry-matter basis in Lindsey’s compilations (12) is protein 
xi.oi per cent, fat 4.38 per cent, fiber 2.25 per cent, and nitrogen-free extract 80.79 per cent. 
