RESPIRATION. 637 



was 42.l, and during the formation of the water 11.6, making 

 together 53.7 ; so that the heat evolved exceeded the heat ge- 

 nerated by respiration by 5.4. 



(6.) Three female guinea pigs were confined in the apparatus. 

 Heat evolved 100, heat due to the formation of carbonic 

 acid 69.6, to that of water 19.3. Both 88*9, or ll.l less than 

 the heat evolved by the animal. 



(7.) A dog aged five years was put into the apparatus. The ex- 

 periment lasted one hour and thirty-one minutes. The air which 

 passed through the vessel containing the dog was 2908*3 cubic 

 inches ; the volume of this air by the breathing of the dog was 

 reduced to 2881*2 cubic inches, so that the diminution of vo- 

 lume was 27' 1 cubic inches, or rather less than 1 per cent. 



The oxygen gas consumed was 340*76 cubic inches ; the 

 carbonic acid formed was 229*94 cubic inches. Hence 110-82 

 cubic inches of the oxygen must have gone to the formation of 

 water. 



The heat evolved raised the temperature of 55*97 Ibs, avoir- 

 dupois of water 1.98. Or it would have raised the tempera- 

 ture of 1 Ib. of water 110.8. 



The heat evolved by the formation of the carbonic acid is 

 61.3, and that by formation of water 29.56, making together 

 90.8, or 20 less than the actual heat evolved. 



(8.) A dog of eight months was enclosed in the apparatus for 

 one hour, forty-two minutes. The volume of air used was 2922*6 

 cubic inches, reduced by the breathing of the dog to 2885*4 cu- 

 bic inches. The loss was 37*2 cubic inches, or about 7 \th part. 



The oxygen consumed was 254*35 cubic inches ; the carbo- 

 nic acid formed was 169*47 cubic inches, so that 84*88 cubic 

 inches of the oxygen must have been consumed in forming water. 



The heat evolved heated 46 Ibs. avoirdupois of water 1*96, 

 or it would have raised the temperature of 1 Ib. of water 88.76. 



The heat evolved by the formation of the carbonic acid gas 

 was 45.. 19 ; and that by the formation of water 22.63 ; mak- 

 ing together 6 7. 82, or 20. 94 less than the actual heat evolved. 



During' this experiment there were 46*44 cubic inches of azo- 

 tic gas evolved. 



(9.) Two dogs six weeks old were enclosed in the apparatus. 

 The experiment lasted one hour and forty-two minutes. The vo- 

 lume of air used was 2871*6 cubic inches. It was reduced by 



