516 Experiments 



sents 1.22 liters of air at 76 cm. Slight absorption of about Vz cm. of 

 mercury; the final pressure therefore is only 36.5 cm. 

 Lethal air: O 7.2; CO 11.5. 



CO.' 

 CO + O = 18.7; = 0.84. 



o 



XIV. Bell of 3.2 liters. 



Begun at 3:24. At 3:27, actual pressure of 28.3 cm.; the bird does 

 not fall; the cocks are closed. 



Dies at 4:56. Lived 1 hour 30 minutes in a quantity of air corre- 

 sponding to 1.19 liters; absorption of about Vz cm.; the actual pressure 

 therefore is 27.8 cm. 



Lethal air: O 7.9; CO 10.3. 



CO- 

 CO.- + O* = 18.2; = 0.79. 



O 



XV. Bell of 4.6 liters. 



Begun at 3:10. At 3:15, drop in pressure of 51 cm., the bird falls. 

 At 3:17, drop of 55 cm.; cocks closed; actual pressure, 21.5 cm. 



At 3:25, the bird rises and appears much less uncomfortable. At 

 4:42, fairly violent convulsive struggling. Last movement at 4:55. 

 Lived 1 hour 40 minutes in a quantity of air corresponding to 1.3 

 liters. 



Lethal air: O 11.8; CO 7. 



CO 



CO- + O; = 18.8; = 0.77. 



O 



Experiments XVI to XIX, simultaneous. May 31; temperature 

 19°. Pressure 75.8 cm. Young, but vigorous sparrows. 



XVI. Bell of 5 liters. 



Begun at 3:43. At 3:53, the actual pressure is only 19.7 cm. The 

 cocks are closed. 



The bird has remained motionless; but when the pressure has 

 dropped 45 to 50 cm.; it becomes uneasy, then sick. At the moment 

 when the cocks are closed, it seems likely to die soon. But about 4 

 o'clock it is considerably better. 



Dead at 5:30. Lived 1 hour 45 minutes in a quantity of air corre- 

 sponding to 1.30 liters. 



At 5:42, the rectal temperature is 25.6°; there is no rigor mortis. 

 At 5:55, the temperature is 22.8° and there is rigor, which therefore 

 came in less than 25 minutes. 



Lethal air: O? 12.9; CO? 7.0. 



CO? 



CO- + O = 19.9; = 0.87. 



O 



XVII. Bell of 4.6 liters. 



Begun at 3:45. As soon as it was under the bell, the bird struggled 

 continuously; the same thing was true during the first part of the 



