488 
PRINCIPLES OF ANIMAL NUTRITION. 
Extracted Straw.—As previously noted in another connection, 
this material consisted of rye straw which had been treated with an 
alkaline liquid’ under pressure, substantially as in the manufacture 
It contained in the water-free state 76.78 per cent. 
of straw paper. 
of crude fiber and 19.96 per cent. of nitrogen-free extract. 
Con- 
siderable interest attaches to the results obtained upon this sub- 
stance as representing to a degree the crude fiber of the food of 
herbivorous animals. 
Computed as before, these results were: 
DISTRIBUTION OF GROSS ENERGY OF EXTRACTED STRAW. 
Work of 
i Digestion; 
‘ 4 In Feces. | In Urine. os sssimila- | In Gain. 
Animal. | Period.| Per Gent. | Per Gent. | Methane. | tion, and | per Cent, 
Building. 
Per Cent. 
Fis eticae deat edie 5 11.35 —0.46 12.40 25.11 51.60 
Di esata een 5 14,14 -—1.11 12.52 30.85 43 .60 
Average ....|...... 12.75 —0.79 12.46 27.98 47.60 
DISTRIBUTION OF ENERGY OF APPARENTLY DIGESTED MATTER. 
Work of 
' In Uri Tui Methane, || Aastealation In Gai 
. . : a ssimilation, . 
Anumal. Period: Per Cent. Per Cont. and Tyasue Per Cent. 
Building. 
Per Cent. 
Een guinea e Sees 5 —0.52 13.99 28 .29 58.24 
Diced 2 wad eaiekeed 5 —1.29 14.58 35.89 50.82 
Average......./.....- —0.91 14.29 32.09 54.53 
PERCENTAGE OF METABOLIZABLE ENERGY RECOVERED. 
Computed b 
Keliners Method. | ‘Writer's Method, 
Ox Ls eee 67.5 67.3 
Mt Jimea nas eke 58.7 58.6 
Average........ 63.1 63.0 
