NET AVAILABLE ENERGY—MAINTENANCE. 417 
Gain. 
Metab- 
olizable Over Net 
Food. Energy Fasting Avail. 
of Food, | Tota}, | Metab- | ability, 
Cals. als. | Olism or | Per Cent. 
Basal 
* Ration, 
Cals. 
Pettenkofer & Voit’s Experiments - 
Nothing’... oc ccscu din yanl ne yeas 0 — 1086 
100 germs. fates vis sated ge seas 942 —275 811 86.1 
350 PAU! San cotuspinlecetnas eke) 3298 +878 | 1964 59.6 
500 IMO AG ois Seach Sochaves a 442 —554 
500 . meat ; 100 grms. fat .....] 1384 +329 883 93.7 
500 200 “ « | 2326 +837 | 1391 73.8 
Rubner’s Experiments : 
INOEHING sis ae suis 4 ne ox ee ea tie 0 —658 
200 grms. bacon ............... 1738 +1016 | 1674 98.6 
INOGNIN BS. eee asda aoe Sakae 0 —373 
39.75 grms. butter fat........... 356 —17 356 | 100.0 
Nothing. ae. caaktvan ee ete e Gans 0 —466 ; 
100 grms. fat ................4. 942 +428 894 94.9 
Nothing’ dic. sa5 cera aoe occ Sadie neni 0 —261 
40 grms. bacon ................ 348 +49 310 89.1 
Magnus-Levy’s Experiments : 
MAS UNE ois sidecases sew aks as 0 —972 
131.6 grms. fat ................ 1250 +259 | 1231 98.5 
RAStING: do nied cn nisacs et gactond ee 0 —1055 
305.5 grms. fat.............2... 2902 +1760 | 2815 97.0 
supply was below the amount required for maintenance also gives 
a rather low availability as compared w th that obtained by the 
other experimenters. 
CARBOHYDRATES.—Tabulating as in the previous cases the re- 
sults of Pettenkofer & Voit * and of Rubner + (see pp. 146-152), 
and adding those of Magnus-Levy (p. 380), we have the figures 
shown on the next page. 
As was the case with fat, most of Pettenkofer & Voit’s experi- 
ments give figures notably lower than those obtained by the other 
two investigators. The averages of the latter, omitting the figures 
which exceed 100 per cent., are: 
Rubner’s experiments 
Magnus-Levy’s experiments 
* Zeit. f. Biol., 9, 485. 
Pr err 
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88 .9 per cent. 
91.0“ « 
+ Ibid., 19, 357-379; 22, 273. 
