THE UTILIZATION OF ENERGY. 481 
DISTRIBUTION OF ENERGY OF APPARENTLY DIGESTED MATTER. 
Work of 
i Digentiorsy 
a | | In Urine. n SESHEUE> | Ty Gain, 
co) Methane. | tion, and ; 
£ 5 Het Coulis Per Cent. | _ Tissue Per Cent. 
aji¢2 Building. 
Per Cent. 
3 | 16.17 9.79 | 40.50 | 33.54 
TIT | 4 | 21.44 5.02 | 38.24 | 35.30 
Kiihn’s experiments ...... ; 
7 
1 
Av.|...} 18.81 .39 | 39.38 | 34.42 
IV | 3 13.92 | —1.07 36.44 | 50.71 
Kellner’s experiments: 
| 
c 
( 1 
[| B) 3] 17.46] —2.10|] 42.57 | 42.07 
{ 3 
| 
L 
B 23.74 0.11 48.06 | 28.09 
Sample D cc sseeecess C 14.15 | —4.67 | 51.46 | 39.06 
Av |...| 18.45 | —2.22 47 .35 36.42 
Sample II............... Dy) 4 14.72 2.27 | 52.01 31.00 
Average of TandII...../....]...| 16.59 0.02 | 49.68] 33.71 
relatively small utilization of the protein as computed by his 
method. (See below.) An unexpected result is that while the 
earlier sample of gluten seems to have increased the methane 
fermentation, the later samples, although containing more starch, 
caused a decrease in the methane production except in case of 
Ox D. 
Digestible Protein.—Kellner does not attempt to compute the 
energy utilized from the wheat gluten as a whole by his method, but 
uses the results as a basis for computing the utilization of the energy 
of the digested protein. He finds that of the metabolizable energy 
of the latter. computed in the manner described in Chapter X 
(p. 316), the following percentages were recovered in the gain: 
OX Bis eiieees els eben eet ies 4 45.0 per cent. 
OX Cm screed aewseten Soees 42.7 “ « 
Ox TU. exmed een Gea ee 45.1 ° « ; 
Osc LY ea akiewawse ence ana Ae Hes 48.8 “ « 
AVGrAP Ec dis Pate oe aes 45.2 “ © 
OX Dir tutageine ot cag ae Wa nalcse eters BIL 
The average loss of energy in the urine was found (p. 317) to be 
19.3 per cent. of the gross energy of the digested protein. Applying 
Digitized by Microsoft® 
