THE UTILIZATION OF ENERGY. 481 
DISTRIBUTION OF ENERGY OF APPARENTLY DIGESTED MATTER. 
Work of 
I eee 
| oc | In Urine. n dion, an ad In Gain. 
‘ A | @ | Pen Cent. Portene Tissue Per Cent. 
a ou Building. 
Per Cent. 
(| III) 3 | 16.17 9.79 | 40.50] 33.54 
| Ill} 4] 21.44 5.02 | 38.24 | 35.30 
Kithn’s experiments ...... | 
[ Av.|...| 18.81 7.39 | 39.38 | 34.42 
IV; 3] 13.92 | —1.07 | 36.44] 50.71 
Kellner’s experiments: 
(| By) 1 | 23.74 0.11 | 48.06} 28.09 
|} B| 3] 17.46 |} —2.10 | 42.57] 42.07 
Sample I ............. {| Cl} 3] 14.15 | —4.67 | 51.46 | 39.06 
| 
L| Av |...] 18.45 | —2.22 | 47.35 | 36.42 
Sample IT............... D/|4/ 14.72: 2.27] 52.01 | 31.00 
Average of IandII.....]....)...] 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: 
Oe Badan eke earescawen ede 45.0 per cent. 
OX Che se Qo 10k hendiini PSS EE ASK ee ns 
OKI puke cetekca nila ana keh ees 45.1% @ 
OSL sa ieee ara ook A 48.8 “ « 
AVePage.....60225e5e4esbaeaeeu 45.2 “ © 
OR Dy stead odontal Date Pac oie ees 32.9 0 
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 
