Colorado Fodders. 
97 
§231. It would seem then that it is not merely a question of 
the amount of energy that disappears or is appropriated, that pro¬ 
duces the beneficial effects of a fodder, but that these may depend 
upon other factors, for instance, the amount of energy used up in 
the process of digestion. We have in the case of the corn fodder 
favorable results with smaller quantities of material than with any 
other fodder. We have 4,940 grams of dry matter digested which 
contained 178.46 grams of proteids, 1,734 grams of carbohydrates 
as sugars and pentosans, 1,211 grams as cellulose, and 1,817 of 
extractive matter, not more specifically classified, and from this the 
animal appropriated 19,424,180 heat units and showed a gain of 
three and one-half pounds of flesh. On the other hand, we find 
that the lot fed on the saltbush digested 7,351 grams of dry matter 
containing 1,090 grams of proteids, 1,280 grams of carbohydrates 
as sugars and pentosans, 2,064 grams of cellulose, and 2,917 grams 
of extractives which we have not endeavored to more nearly class¬ 
ify, and from this the animals appropriated 23,149,533 calories, los¬ 
ing at the same time eight and one-half pounds. It is just that I 
should repeat that, while each of the three sheep lost, one of them 
lost but one-half pound, but the aggregate for the lot was 8^ 
pounds. 
§232. The heat values of the various extracts of the alfalfa, 
corn fodder and saltbush were determined, and we found that, as a 
source of energy, the portion that I have designated cellulose is one 
of the most important. 
§233. I have designated it cellulose to distinguish it from 
crude fibre, because the portion usually designated as crude fibre was 
treated in a moist condition with chlorin and then washed and boiled 
with one per cent, sodic hydrate and subsequently with sulfurous 
acid. This treatment with chlorin, etc., removed a considerable 
portion of the energy, but this energy is of little value in any of the 
fodders, the greatest value being observed in the case of the alfalfa, 
in which 24.0 per cent, of this energy was appropriated, but in the 
saltbush and corn fodder it was of no value. The total amount of 
energy removed from the crude fibre of the saltbush by this treat¬ 
ment was 8,508,528 calories out of a total of 59,205,051 for the 
hay, and from that of the alfalfa 6,045,840 calories out of a total 
of 49,585,495 calories fed. The relative quantity of heat removed 
from the crude fibre of the corn fodder by the chlorin is much less, 
i. e., 1,482,734 calories out of a total of a little over 25 millions con¬ 
sumed and was whglly non-available. The alcoholic extract is again 
shown to be the most important portion of the fodder. The heat 
appropriated from this portion of the alfalfa was 10.7 millions 
calories out of a total of 30.9 millions; from that of the corn fod- 
