72 The Colorado Experiment Station. 
§i6i. The sugar found in the hydric chlorid extract of the 
saltbush and in the other fodders is probably xylose, except in al¬ 
falfa in which case the mucic acid found is very nearly ecpial to 
the sugar obtained by the Fehling solution and only a small portion 
can be attributed to xylose. My results with corn fodder are not 
satisfactory, but the four tests made agree in showing the presence 
of some mucic acid. In this case we know that both glucose and 
sucrose were present and whether their presence may have given 
rise to a mistake or not may'be a question. Assuming that they 
did not, it w'ould appear that other hexoses as well as pentoses are 
present in this fodder. In this event, the three fodders, alfalfa hay, 
corn fodder, and saltbush hay, are cpiite unlike and we find the coef¬ 
ficients of digestion for the sugars formed by the thorough inver¬ 
sion of the hydric chlorid extract to be 83.96, 89.22 and 58.57 re¬ 
spectively, which would indicate that the source of this sugar is 
different in the saltbush form than in the other two fodders. As 
already stated it is probably due to galactan in the alfalfa and 
possibly to both hexose and pentose groups in the corn fodder. 
The digestibilty of the hydric chlorid extract, that is all that this 
reagent dissolves out of these fodders, is nearly the same in the 
alfalfa and corn fodder, 60 per cent, in the former, and 63.88 per 
cent, in the latter, but it is only 39.88 per cent, for that of the salt¬ 
bush. 
§162. The furfurol has been considered as such and no at¬ 
tempt has been made to specify the particular source from which 
it was derived. The amount consumed in the different fodders 
varied from 1030 to 1526 grams and the coefficients of digestion 
found varied from 37.37 in the saltbush to 65.15 in the alfalfa. If 
there is any relation between the digestibilty of the furfurol and 
the value of the hay it is a very general one. The merits of the six 
fodders used in this study were as follows: Alfalfa, very decidedly 
the best, corn fodder and native hay standing next, timothy hay 
next, with the sorghum and saltbush standing far behind the others. 
The coefficient of digestionof the furfurol in these fodders was found 
to be as follows: Alfalfa, 65.15, native hay 50.97, corn fodder 
47.07, timothy hay 50.13, sorghum 46.46 and saltbush 37.37 per 
cent. A study of the amount of furfurol removed by the successive 
treatments to which the hays and fodders were subjected estab¬ 
lishes the fact that they deport themselves somewhat differently, 
the saltbush showing the same amount, relatively, after as before 
extraction with alcohol, while the other samples showed a decided 
loss. That extraction with cold water should remove a little fur¬ 
furol would be expected, provided the material removed and suscep¬ 
tible of inversion is really due to gums. We, however, find that it 
is uniformly small, as is also the case with the hot water and malt 
