4:20 RESPIRATION. 



" 1. A man, in repose and fasting, with an external tem- 

 perature of 90 Fahr., consumes 1,465 cubic inches of oxygen 

 per hour. 



" 2. A man, in repose and fasting, with an external tem- 

 perature of 59 Fahr., consumes 1,627 cubic inches of oxygen 

 per hour. 



"3. A man, during digestion, consumes 2,300 cubic 

 inches of oxygen per hour. 



" 4. A man, fasting, while he accomplishes the labor ne- 

 cessary to raise, in fifteen minutes, a w r eight of 7*343 kil. 

 (about 16 Ib. 3 oz. av.) to the height of 656 feet, consumes 

 3,874 cubic inches of oxygen per hour. 



" 5. A man, during digestion, accomplishing the labor 

 necessary to raise, in fifteen minutes, a weight of 7*343 kil. 

 (about 16 Ib. 3 oz. av.) to the height of 700 feet, consumes 

 5,568 cubic inches of oxygen per hour." 



Influence of Temperature. All who have experimented 

 on the influence of temperature upon the consumption of 

 oxygen, in the warm-blooded animals and in the human sub- 

 ject, have noted a marked increase at low temperatures. 

 Cold-blooded animals always suffer a depression of the vital 

 processes at low temperatures, with a corresponding diminu- 

 tion in the quantity of oxygen consumed, until they finally 

 become torpid. 



Immediately after birth, the consumption of oxygen in 

 the warm-blooded animals is relatively very slight. Buffon * 

 and Legallois 2 have shown that just after birth, dogs and 

 other animals will live for half an hour or more under water ; 

 and cases are on record where life has been restored in newly- 

 born children after seven, and, it has been stated, after twenty- 

 three hours of asphyxia. During the first periods of exist- 

 ence, the condition of the newly-born approximates to that of a 



best means of investigation at their command leads us to place every confidence 

 in the comparative results. 



1 MILNE-EDWARDS, Physiologic, tome ii., p. 559. 



2 LEGALLOIS, (Euvres, Paris, 1824, tome i., p. 57. 



