CoivORADo Fodders. 
9 
of those groups which yield the reducing* sugars under tlie condi¬ 
tions already indicated and also of those complexes which yield 
furfurol on distillation with twelve per cent, hydric chlorid solution, 
but as I have sought to determine the distribution of these groups 
and complexes in the different extracts it will be quite impossible to 
bring the results within the compass of a single table. I will, there¬ 
fore, be compelled to make two statements of the results which will 
supplement each other, but which cannot in any sense replace or con¬ 
tradict each other. I will also give the calorific values of the hays, 
dungs and of the residues yielded by the respective treatments in the 
case of the alfalfa, corn fodder and saltbush, these being the best 
for our purposes; timothy hay, sorghum and native hay not suiting 
so well. Our native hay is a mixture of such character that results 
obtained with it would be of little value except in a very general 
sense. 
§20. The hays and fodders used in this work are the same as 
those used in Bulletin 93, in fact, that work was done largely for 
the purpose of obtaining data according to the conventional methods 
for the particular samples used n this study. The hays and fodders 
were intentionally chosen to represent both legumes and grasses 
grown and preserved under our Colorado conditions. 
§21. The distribution of the nitrogen in these extracts appears 
from the results of the work recorded in Bulletin 39, to present some 
points of more than usual interest. For instance, we found that 27 
per cent, of the total nitrogen in alfalfa hay was removed by ex¬ 
traction with boiling 80 per cent, alcohol and subsec[uent treatment 
with cold water. This nitrogen may have been contained in the 
coloring matters to a greater extent than in some other hays, but it 
is certainly not all contained in the chlorophyll and it 
is not probable that it is amid nitrogen for it exceeded the amount 
that we had previously found in alfalfa hay in this form. The ad¬ 
visability of making these nitrogen determinations is further indi¬ 
cated by the persistence with which some nitrogen remains with 
the crude fibre after boiling with 1.25 per cent. #odic hydrate solu¬ 
tion. In the work referred to we found that 4.51 per cent, of the 
total nitrogen in alfalfa hay remained in the crude fibre, when it had 
been prepared in the usual way by boiling for thirty minutes with 
the 1.25 per cent, sodic hydrate solution. We shall see that this 
was not a chance result, but indicated a general fact and we shall 
further see that this statement is correct for the hays and fodders 
studied in this bulletin. 
§22. The distribution of the ash in these various extracts has 
been wholly disregarded. 
§23. The analysis of the dungs present, of course, the same 
questions that the conventional methods do in regard to the com- 
