i 3 o RESPIRATORY EXCHANGE OF ANIMALS AND MAN 



in which the problem can perhaps be solved. He calculated from 

 the average temperature and the specific heat of the animal body the 

 amount of heat present in a hibernating hedeghog at the beginning of 

 the series of respiration experiments. Just after the series, when the 

 animal was fully awake, it was killed and the quantity of heat present 

 determined in an ice calorimeter. The increase in heat was found to 

 be 13412 cal. - 3561 cal. = 9851 cal. From the oxygen absorbed 

 during the series of experiments, and assuming a combustion of fat, 

 the heat produced worked out as 10335 ca ^- The heat lost during the 

 experiment was assumed to account for the difference, but a determina- 

 tion was not undertaken. It is obvious that the process of awakening 

 ought to be studied by means of a respiration calorimeter. 



