90 
Thk Colorado Experiment Station. 
a coefficient of digestion of 49, but that of the proteids contained in 
this extract is 70, so that the substances, other than proteids in this 
extract must have a low coefficient, which is consonant with the le- 
sult obtained in the case of the corn fodder. The portion of this 
extract, sodic hydrate, having the greater value is probably the 
nitrogenous substance, while the carbohydrates possess the lessei 
value. . 1 11 .1 
§213. None of our results are more instructive probably than 
those shown by the portion which resists the action of our solvents, 
even the chlorin followed by the caustic soda and sulfuious acid. 
We find that this residue from the alfalfa hay has a coefficient of di¬ 
gestion of 52.8, a^d that from the corn fodder a coefficient of 54-Oper 
cent. The boiling one p6r c^^it. solutions of hydric chloiid and sodic 
hydrate are pretty active agents, tvpt moist chlorin is much more ac¬ 
tive, still the animal digestive processc>?.T^^^^ solution of up¬ 
wards of 50 per cent, of the material in the go^P^ alfalfa and 
corn fodder, which has resisted these agents, wii'^l^ 
der, saltbush, these processes are capable of bringfiP^ ^9 P^’* 
cent, of this residue into solution. It will be shown a liT^^^ that 
the heat values show a similar result. 
§214. There is no evidence, that I have discovered, 
saltbush had any deleterious effect on the sheep, though I ha^-^^ been 
told that it acts as a laxative on cattle, and it did induce exc^^^^^^^ 
thirst and urination in the sheep experimented with. There 
no indications that the sheep were in the least uncomfortable. While' 
the nitrogenous substances in this forage may be inferior in value to 
those in the alfalfa, there is no proof that they are. Two things are, 
however, clear—that they are much more abundant and have a 
much higher coefficient of digestion than those of the corn fodder; 
in fact, this fodder approaches the alfalfa in this respect more closely 
than either of the other fodders used in the experiment, and while 
I know nothing relative to the fuel value of the nitrogenous com¬ 
pounds, it may be assumed that the differences are not sufficient to 
completely reverse the indications given by the coefficients of di¬ 
gestion obtained for the proteids, according to which the saltbush 
should have a very much higher feeding value than the corn 'fodder, 
and nearly equal to that of the alfalfa. On the other hand, all of the 
data obtained indicate that the carbohydrates, whether soluble in 
the various menstrua or not, are difficultly digestible and, taken all 
together, are of low fuel value. This is particularly the case with 
the two important portions, the portion removed by hydric chlorid, 
I per cent, solution, and the cellulose or residue, the former having 
a coefficient of digestion of 39.9 and the latter of 29.0 per cent., as 
against 69.4 and 54.0 per cent., respectively, in the corn fodder. The 
factor in this fodder which seems to determine its feeding value is 
