542 PRINCIPLES OF ANIMAL NUTRITION. 
and these computations in turn supply a check upon the hypoth- 
esis of the non-availability of crude fiber. 
Wolff makes the comparison by deducting from the total fiber- 
free nutrients 3300 grams per 500 kgs. live weight for maintenance 
and comparing the energy of the remainder with the amount of 
work done. In the following tabulation of his results this method 
has been pursued. For the energy of the fiber-free nutrients, 
Zuntz’s figure (3.96 Cals. per gram) has been used and the work of 
locomotion has been estimated at 50, 000 kgm. per 100 revolutions 
of the dynamometer (compare p. 539). 
diene Big 
utrients oa 
; Minus 3300 | Work Done. | 2 § 
Period. Ration. Grms. ge 
Fal 
Grms.| Cals.| Kgm. | Cals.| 
1891-92. : : 
TIe....] Hay, 7.0 kgs.; oats, 4.5 kgs.............. 1,424] 5,639] 931,676'2,197/38.95 
Oo cre! Eby tor ds eonciap ait aibteaevets 18 1,990) 7,881)1,129 568) 2,663/33.79 
a PP AERO! ORS cc apekaseses wie atic 2,259 Bi vise 1,094 ,328]2 ,581/28.86 
Oa ed Pea Wakihidiw eS Sa seinwiletle 8 iidesarer's Sis, Seace snail, asst costs aie | BOs LO 
1892. 
kgs.; ; oats, z 2 kgs.; eshesied cs ugh anes 1,775| 7,026]1,074,802/2,535/36 .07 
straw, 1 kg....}| 1.873] 7.416]1,153,813|2,720/36 .68 
“ grain, 5 O kgs. . 1.5 kgs.} 1,521) 6,023] 912,454!2,152/35.73 
re 5.0 “ “1.5 “ | 1,860] 7,365/1,186 ,577/2,799/38) 00 
“ oats,4.5 ‘ . see..] 1.90 537/1,188 ,388]2 ,803/37 .18 
EH Bsecetenn od xqersi ee we a [aise asa exsiffstaceiy OO ie 
1892-93. 
kgs.; oats, 4.0 kgs. Fs seed at elev iced 1,475] 5,841] 897,678/2,116'36.24 
ce Dei ceva aise Mawes 2,297! 9,095/1,280,687 302433 20 
‘ Bee BB EE Oe sasautenegoisecey avs 1,670] 6.613] 905 ,568)/2,135/32.28 
ie “5.5 ‘* ; straw, 1 kg...} 2,036] 8,063]1,167 ,127|/2,752/34.14 
= eae (> aaa “1S ...) 2,577/10,210)1 421 ,285/3,352'32.85 
. Gabe “2 kegs. .| 2, stool 10 0,660 shasta 3 oe 34.28 
oR eC POC TEE eee OUT oe rary one ener y her Serer ee (83.74 
1893-94. 
Teas Hay, 6.5 kgs.; oats. 4.0 kgs.; straw, 1. 0 ‘ke. 1,607) 6,362} 900,267|/2.122/33 .36 
TI. ...2|) “3 0 * 7.0 2.5kgs.| 2,580}10,220/1 ,549,262/3,653/35.76 
V......{| “ 3.0 ‘ grain,7.0 ‘ “2.5 ‘* .| 2,560/10.140!1 ,545,702/3,645:'35.95 
WIe cass) “" 8.0 6.5. “2.5: .| 2,880 ae 1,673,786/3,948!34.61 
ASOT ageless ccs aaikdis esate on dG, tes leet es ere sees [88:08 
In every instance but one the utilization as thus computed 
exceeds 31.3 per cent. In other words, the energy of the body 
material which, according to Zuntz & Hagemann’s results, must 
have been metabolized to produce the amount of work done exceeds 
considerably the amount computed to be available from the food. 
There being no reason to question the substantial accuracy of Zuntz 
& Hagemann’s factor, this means, of course, that if the food and 
work were in equilibrium our estimates of the energy available from 
