THE UTILIZATION OF ENERGY. 489 
DISTRIBUTION OF ENERGY OF DIGESTED MATTER (KELLNER). 
Average of 
H and J. 
TAUPO we AV rete se Moda Beatie nol wie ke, tee gtedy 0.0 
Dnmethanes, opis siuacias i dew o4Wk -dysledeata ces 14.0 
Work of digestion, assimilation, and tissue building. 31.7 
Ini PAM oe a oe ven Dye ea ee ae Sa te ieee 54.3 
100.0 
As was noted in discussing the results upon metabolizable 
energy, the. treatment to which the straw was submitted left 
it in a condition in which its digestibility, and consequently its 
percentage of metabolizable energy, compared favorably with that 
of starch. As we now see, this analogy extends also to its effect 
in producing gain, the figures showing in this respect a slight 
superiority on the part of the extracted straw, as appears from 
the following summary: 
RECOVERED IN GAIN. 
Starch (Kellner’s 
Experiments on 
Moderate Extracted Straw. 
Rations). 
Per cent. of gross energy...............-- 43.4 47.6 
“ «© apparently digested energy.... 53.1 54.5 
“ «© metabolizable energy.......... 59.0 63.0 
The reason for this strikingly high value of the extracted straw 
as compared with the low value indicated for crude fiber by the 
results of Zuntz and Wolff will be considered in a subsequent para- 
graph. 
Summary.—For convenience of reference the foregoing results 
may be summarized in the tables on pages 490 and 491, 
showing respectively the percentage distribution of the gross 
energy of the feeding-stuffs, that of the energy of the appar- 
ently digested organic matter, and the percentage utilization of 
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