NET AVAILABLE ENERGY—MAINTENANCE. 417 
Gain. 
Metab- 
olizable Over Net 
sa are Metake | gbilty 
i ale, , pope glist or | Per Cent. 
Basal 
Ration, 
Cals. 
Pettenkofer & Voit’s Experiments : 
Nothings.< 2423 ¢e206.53 ce0aed a sced 0 —1086 
100 grms. Pabics dsiegcoaue he ares hsicar arate 942 —275 811 86.1 
350 fatto sioe cet ceseati te 3298 +878 | 1964 59.6 
500) << Inala. dae eG hae aeons 442 —554 
500 ‘ meat; 100 grms. fat .....] 1384 +329 883 93.7 
500 “ “200° “  ....} 2326 +837 | 1391 73.8 
Rubner’s Experiments : 
Nothing: vse ca quis vee nels cela 0 —658 | | 
200 grms. bacon ...........+.+05- 1738 +1016 | 1674 98.6 
Nothing an je seek ed edhinecdce cg ee detearade 0 —373 
39.75 grms. butter fat............. 356 —17 356 | 100.0 
NoOthingiin. cc ncncgadwentan ees ears 0 —466 
100 grms. fat ...............0-06- 942 +428 894 94.9 
Nothing .3.cg5 5 csueaeeaae genes es 0 —261 
40 grms. bacon ..............00. 348 +49 310 89.1 
Magnus-Levy’s Experiments 
Nastia giias sos ea. Sages oases eS 0 —972 
131 .6 gris; fat: vos news cau es pee en 1250 +259 1231 98.5 
ASQ sacyicy case os ten hake ee ee 0 —1055 
305.5 grms. fat...............0000. 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 ............. 88.9 per cent. 
Magnus-Levy’s experiments ........ 91.0“ “ 
* Zeit. f. Biol., 9, 485. - ¢ Ibid., 19, 357-379; 22, 273. 
