6o 
The Colorado Experiment Station. 
determination or indicates the probable presence of this group in 
fecal matter. The results of our determinations, 14 in all, indicate 
a much higher percentage of this group in the feces than in the fod¬ 
der consumed. The results in this case are very high for the feces, 
but it was done in triplicate and the three determinations agree very 
well. 
AMID nitrogen. 
§139. The amount of amid nitrogen found in the sorghum 
was small, corresponding to only 0.884 cent, calculated as pro- 
teids. We found none or only a trace in the orts and 1.168 per cent, 
in the feces. The coefficient of digestion found in this case was 
51.91 per cent. This is somewhat higher than the coefficient found 
for the total nitrogen calculated as proteids, 8.95 per cent, higher. 
HEAT appropriated BY THE ANIMALS. 
§140. The air-dried fodder possessed a heat value of 3,890 
calories per gram; the orts, 1,749 grams in weight, are supposed to 
have the same value; the feces, which weighed 4,849 grams, had a 
fuel value of 4,111 calories per gram. The sheep consumed 11,574 
grams of air-dried fodder and appropriated 55.72 per cent, of its 
fuel value. 
§141. We did not determine the distribution of the proteids 
in the various extracts of sorghum and their respective coefficients 
of digestion, neither did we make a detailed study of the fuel values 
of the respective extracts, etc. 
§142. This fodder had already proved to be a disappointment, 
but not to as great an extent as the saltbush, so I scarcely hoped to 
gain anything by extending this work. 
§143. The sheep fed on this fodder lost in the five days be¬ 
tween the two weighings, 3, 2^^ and 3 pounds, respectively, an ag¬ 
gregate loss of 8 j 4 pounds. They appropriated in this period 25,- 
088,621 calories, which was evidently not sufficient to maintain the 
animals in good condition. The coefficients of digestion for this fod¬ 
der were cpfite as promising as those obtained for corn fodder, with 
the exception of that obtained for the crude fibre; the latter coeffici¬ 
ent is nearly 8 per cent lower in the sorghum than in the cornfodder. 
The dry matter consumed by the sheep when fed corn fodder was 
8,289 and 10,934 when fed sorghum; the same sheep were used in 
these two experiments and the conditions were equally favorable in 
both series. The sheep all gained on the corn fodder and lost while 
being fed the sorghum fodder. The sheep appropriated 19,424,180 
calories while feeding on corn fodder, as against 25,088,621 while 
feeding on sorghum. The urine was unfortunately not collected 
