346 PRINCIPLES OF ANIMAL NUTRITION. 
With a dog the following results were obtained: 
Carbon Dioxide 
F Excreted. 
Live Nitrogen M Aen 
Day. Weight, | in Urine, olized 
Grms. Grms. Grms: Per Head Per Kg. 
Grms. ’ Live 
m Weight, 
Grms. 
TES te c-otuerd ate dencn 2% 9190 4,23 51.74 187.4 20.70 
Second...........-...2- 8920 2.89 45.94 157.5 17.83 
Pourthsisy sales dé auiece's *..| 8620 3.65 42.90 146.9 17.99 
Tenthiss vse aceexas bees S 8190 2.59 45.55 151.7 18.70 
Eleventh .............. 8030 2.41 41.83 140.4 17.86 
Twelfth ..............-- 7890 2.53 36.48 127.9 16.13 
Thirteenth ............ 7970 2.98 37.45 134.8 17.06 
Fourteenth ............ 7830 3.02 33.80 125.0 16.12 
Rubner also quotes the following results by Kuckein on a cock: 
Carbon Dioxide per 
Day. ; Kg. Live Weight. 
STUY ye se sce sold eias ahd aren aes etnc 21.73 grams. 
Hitting ere oe eh eee Poe Aware 21.47 “ 
Seventh. .......... 0.000 eee 21.43“ 
Rubner’s experiments on a guinea-pig * show a similar constancy, 
the heat production being computed from the total metabolism: 
Heat Production 
Day. per Kilogram. 
PATS Uibonaa: Sai Gast atte hd Barnes fs 149.9 Cals. 
DECOM Garis ecckold ninisbern rahe ry eriay ees 162.6 “ 
AAT ers. 2do eas Aa Rese Meee seca l 156.5“ 
Pourthive Aaiiiae cia ate aie den 140.5 “ 
Pi thes shy ides aaa gate aaete 137.3 “ 
DIK Shas eee eae oteeee ane 150.6 “ 
Seventh....... 157.4.“ 
Wisi ees Grade ek eclears 155.6 “ 
Ninth wl el ee ea a eek ete 162.6 “ 
Concerning this point Rubner says:+ “The uniformity of the. 
fasting metabolism proves that, in spite of the undoubted limita- 
tation of all the voluntary functions which can cause a consump- 
tion of matter, no further reduction of the metabolism is possible, 
* Biologische Gesetze, p. 15. t Loc. cit., 19, 326. 
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