346 
PRINCIPLES OF ANIMAL NUTRITION. 
With a dog the following results were obtained: 
Carbon Dioxide 
a ti Fat ereted. 
Day. Weight ia une, aot = x 
Grms. Grms. Grms. | Per Hea d, ae Kg 
TTS ad 
‘ Weight, 
Grms. 
Wirsts cesses vee escaeess 9190 4,23 51.74 187.4 20.70 
Seconds. + oc ecssevn a Bate es 8920 2.89 45 .94 157.5 17.83 
Fourth...........-.-.2. 8620 3.65 42.90 146.9 17.99 
TON gcc tavasiharatiwsn 8190 2.59 45.55 151.7 18.70 
Eleventh .............. 8030 2.41 | 41.83 140.4 17.86 
Pwelfth..3/.icauiec aaa 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 
Kg. Live Weight. 
21.73 grams. 
21.47 
oe 
“ce 
Rubner’s experiments on a guinea-pig * show a similar constancy, 
the heat production being computed from the total metabolism: 
Heat Production 
per Kilogram. 
.... T49.9 Cals. 
wo. 162.6 
... 156.5 “ 
... 140.5 “ 
... 187.38 
... 150.6 
157.4 “ 
... 155.6 “ 
.... 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, 
+ Loc. cit., 19, 326. 
* Biologische Gesetze, p. 15. 
