Colorado Fodders. 
71 
lost only one-half pound. The difference in the loss cannot be at¬ 
tributed to this sheep’s having drunk more water than the other, 
for it drank less by a few pounds, so that the disturbing influ¬ 
ence of an excessive amount of water would probably not be greater 
in the one case than in the other. 
§158. The portion removed from the fodders by treatment 
with chlorin and subsequent washing with sodic hydrate and sul- 
furous acid, is usually small, but amounts to 10.28 per cent, in the 
saltbush. The coefficient of digestion found for this portion is 
always low. In this case it.was found to be only 6.28 per cent. 
The low coefficient for this portion may be more apparent than real. 
The percentage of it present in the feces is always comparatively 
high, in some cases exceeding the amount consumed. This may 
be, and probably is due to fecal matter, a large percentage of which 
is removable by this chlorin treatment, which of course would lower 
the coefficient found, even to the extent of reducing it to zero or 
showing, as is the case of some extracts, that there was more 
voided than was ingested. 
§ 159. The sucrose determination in several of the fodders 
is rendered very doubtful, almost certainly erroneous, by the fact, 
as the investigation shows conclusively, that some of the substances 
which yield furfurol are taken into solution by alcohol and presum¬ 
ably yield a reducing sugar when the extract is inverted by heating 
with dilute acid. This doubt does not attach to the glucose, as this 
determination does not involve the inversion of the solution, unless 
such may have taken place during the repeated boilings with 
alcohol or during its evaporation, which was done on the water 
bath to avoid either local or general overheating. 
§160. The fact that the alcoholic extract of the feces, corre¬ 
sponding to the saltbush, shows the presence of some substance 
equivalent to 0.21 per cent, of sucrose cannot be taken as conclusive¬ 
ly showing the presence of sucrose, but merely that the extract con¬ 
tains some material susceptible of yielding a reducing power equal 
to this. In the case of corn fodder and sorghum, especially as a 
saccharine variety was used, the presence of some sucrose in the 
alcoholic extract of the fodder was to be expected, but the feces 
corresponding to these fodders yield no sucrose to the boiling 80 per 
cent, alcohol. The same doubt attaches itself to the starch deter¬ 
mination that has been mentioned in connection with the sucrose, 
i. e., we have depended upon boiling the fodder with water for one 
hour, cooling it and adding malt extract to bring the starch into 
solution, but we observe that this process removes enough furfurol 
in every case in which any starch was found to raise a question as 
to whether the reducing power was due to inverted starch or to a 
pentosan. 
