The: Colorado Expe:rimknt Station. 
98 
der, 7 millions out of a total of 19.4 millions, and from that of the 
saltbush, 5.8 millions out of a total of 23.2 millions. 
§234. The second portion in importance was not the same in 
the three fodders, it being the sodic hydrate extract in the alfalfa 
and saltbush and the cellulose in the corn fodder. In the alfalfa 
8.2 millions calories and in the saltbush 5.5 millions calories were 
appropriated from the sodic hydrate extracts, but this extract of the 
corn fodder furnished only 2.1 millions calories. The third pro¬ 
tein in importance in the alfalfa and saltbush was the cellulose, 
which furnished 5.95 millions and 4.4 millions calories, respective¬ 
ly, in these cases. The fourth one in order of value is, in the al¬ 
falfa and saltbush, the hydric chlorid extract, from which the sheep 
appropriated 3 millions and 4 millions calories, respectively. The 
extracts of the alfalfa have, in the order given, furnished the larger 
amounts of heat, both absolutely and relatively, but this is re¬ 
versed in the hydric chlorid extract, that of the saltbush furnishing 
the larger quantity. The order of extracts of the corn fodder in 
regard to their heat value is a different one, the alcoholic extract 
standing first, the residue or cellulose standing second, the hydric 
chlorid extract standing third, and the sodic hydrate extract falling 
to the fourth place. In the alfalfa and saltbush, we have a large 
amount of proteids, but we have seen that these are very freely dis¬ 
solved by the alcohol and are represented almost as largley by the 
alcoholic extract as by that of the sodic hydrate, as the following 
amounts digested in the two extracts will show: 
Alfalfa ..Alcoholic extract, 486 grams; sodic hydrate, 698 grams 
Saltbush .Alcoholic extract, 553 grams; sodic hydrate, 378 grams 
Corn Fodder .Alcoholic extract, 141 grams; sodic hydrate, 000 grams 
Timothy Hay ....Alcoholic extract, 129 grams; sodic hydrate, 131 grams 
Native Hay .Alcoholic extract, 117 grams; sodic hydrate, 194 grams 
from which I infer that it is not probable that the value of the 
sodic hydrate extract in the alfalfa and saltbush is dependent upon 
the proteid content of the hays, but due to other compounds. In 
passing this subject, it may be noted that the proteids soluble in 
alcohol have as high or higher coefficients of digestion than those 
soluble in the sodic hydrate. The proteids soluble in hydric chlorid 
are less in amount and have lower coefficients of digestion than 
those soluble in alcohol or sodic hydrate. 
§235. There appear now good reasons why the native and 
timothy hays might have repaid us for making a comparative study of 
them, even though the timothy has already been studied in this 
sense, at least to some extent, and the native hay could give results 
of a general value only. 
§236. The native hay and corn fodder are apparently much 
more similar than any other two of the six; they gave the same 
