New York Agricultural Experiment Station. 415 
From an examination of the preceding table we find that the total 
nitrogen averages 20.56 per cent less in the late cut timothy than in 
that cut in full bloom. Instead of the proportion of albuminoid 
nitrogen to the total nitrogen increasing between the period of full 
bloom and seed formation, there was rather a considerable diminution, 
with a corresponding increase in the relative proportion of amide 
nitrogen. The increase in amide nitrogen was probably due to the 
breaking up and transferring of the albuminoids of the stalk to the 
seeds, which were formed but not fully developed when the second 
cutting was made. That is, the nitrogen taken up by the grass at this 
period of its growth seems to have been very small, while the transfer 
of material from the stem to the seed was rapidly going forward, and 
the formation of starch and fiber was progressing throughout the 
plant, so that the increase of organic matter was considerable. 
Digestibility. 
Having determined the principal proximate constituents of the hays, 
we may, by determining the digestibility of their albuminoids, be 
able to throw further light upon the relative value of early and late 
cut hay for feeding; 
Plat, 
TIMOTHY. 
Total 
albumi- 
noids, 
Nx. 6.25. 
True 
albumi- 
noids. 
Per cent 
undi- 
gested. 
Per cent 
of total 
albumi- 
noids di- 
gested. 
Per cent 
of true 
albumi- 
noids di- 
gested. 
VI... 
Full bloom 
8.00 
7.50 
3.87 
51.62 
48.40 
VI... 
Late cut 
6.37 
5.25 
3.56 
44.11 
32.19 
XV... 
Full bloom 
8.12 
5.75 
3.25 
59.97 
43.47 
XV ... 
Late cut 
6.44 
4.25 
XIX . . . 
Full bloom 
7.81 
7.50 
3.75 
50.70 
50.00 
XIX . . . 
Late cut 
6.13 
6.13 
3.87 
36.83 
36.83 
From the above table we find that there was a marked decrease in 
digestibility of the albuminoids for the late cut timothy over that cut 
in full bloom, and the figures are further suggestive as pointing out 
a possible explanation for the great variation in the digestion coefficients 
found by different investigators, or the same investigators in 
different years, for similar hays. If, as seems to be the case from the 
trials we have made, the more mature hay is less digestible than that 
cut earlier, then two feeding trials made with similar hays, but at 
different stages of maturity, might show a difference in their coefficients 
of digestibility of at least 23 per cent as indicated by the last table, 
which, aside from any idiosyncrasies of the animal, might be sufficient 
to reconcile the results. 
