518 Experiments 



The air sample taken at 9:30 contained 0-> 8.8; CO 9.4. 

 The lethal air contained O* 8.3; CO 9.8. 



CO 



CO + O. = 18.1 ; = 0.78. 



O 



XXI. Bell of 7 liters. 



Begun at 2:51. At 2:55, pressure is 30.3 cm. The bird, which has 

 been struggling a good deal, is quite sick, and has difficulty in stand- 

 ing up. Cocks closed. At 5:25, very sick. 



Dies at 7:20. It therefore lived 4 hours 25 minutes in a quantity 

 of air corresponding to 2.79 liters, or 1 hour 34 minutes per liter. 



At 7:30, its temperature is only 25°; no rigor; at 7:40, found stiff. 

 Lethal air: O 8.2; CO* 10.1. 



COs 



CO 2 + O 2 = 18.3 ; = 0.79. 



O 



XXII. Bell of 5 liters. 



Begun at 2:47. Struggles a great deal. At 2:51, the pressure is 

 only 26.1 cm. The bird is very sick and crouched against the rim of 

 the bell. 



Dies at 2:53. At 3:10 is very stiff. Its temperature is 34.7°. 



Lived 6 minutes. No air sample taken. 



XXIII. Bell of 5 liters. 



Begun at 3:20. Struggles a great deal. At 3:24, the pressure is 

 30.3 cm.; the bird does not seem sick; cocks closed. At 5:25, very sick. 

 The time of death was not noted. 



Lethal air: O 8.3; CO' 10.3. 



CO 



CO- + O = 18.6; = 0.81. 



O 



XXIV. Bell of 2.5 liters. 



Begun at 2:51. At 2:59, the pressure is 30.5 cm. Struggled a 

 great deal, vomits, but does not fall. Cocks closed. 



About 3:05, a little struggling. Dies at 4:30. 



At 4:50, temperature 27°; pronounced rigor. Lived 1 hour 31 min- 

 utes in the bell the capacity of which corresponds to 1 liter. 



Lethal air: O- 10; CO 10.4. 



CO* 



CO= + O* = 20.4; = 0.95. 



O 



The average of the four experiments in which the air was ana- 

 lyzed is for the pressure of 30.5 cm.: O 2 8.7; CO 2 10.1. 



Experiments XXV to XXVIII, simultaneous, made with the same 

 purpose as the preceding ones. June 8. Temperature 20.5°; pressure 

 76 cm. House sparrows. 



