Death in Closed Vessels 547 



Experiment LXXIII. March 15. Rabbit weighing 1.650 kilos. 

 Bell-jar of 20.75 liters. 



Began at 3:48. At 4:05, the pressure is 29 cm. Cocks closed. 

 The animal dies at 6:42; ten minutes after, its temperature is 32°. 

 Nothing can be said about its duration of life, because a little air 

 entered during the experiment. 



Lethal air: O a 11.0; CO, 9.0. 



CO, 



CO* +0=20; =0.90. Oxygen tension = 4.2. 



O, 



The value of the ratio O x P in these four experiments is: at 



76 

 normal pressure, 3.7; at 41cm., 3.2; at 29 cm., 4.2; at 16cm., 4.0. 



GUINEA PIGS. Experiments LXXIV-LXXV, simultaneous. Aug- 

 ust 5. 



LXX7V. Weight 420 grams. Bell- jar of 3.2 liters. Entered at 

 3:45, at normal pressure. Dead at 5:05, after uneasiness, sudden leaps, 

 etc. . . . Never remained quiet. A quarter of an hour later, its rectal 

 temperature is 37°. 



420 grams lived 1 hour 20 minutes in 2.78 liters of air, that is, 

 12 minutes per liter and per 1000 grams. 



Lethal air: O* 2.3; CO, 16.4. 



CO, 



CO- + Os = 18.7; = 0.88. Oxygen tension = 2.3. 



02 



LXXV. Weight 470 grams. Bell-jar of 5 liters. 



Began at 3:55, and brought in 2 minutes to 46.5 cm. of actual 

 pressure. 



Remains perfectly quiet. At 5:17, convulsive trembling. Dies at 

 5:20; 17 minutes after, the rectal temperature is 34°. 



470 grams lived 1 hour 24 minutes in 4.53 liters at 46.5 cm., repre- 

 senting at 76 cm., 2.10 liters. Therefore 1000 grams lived 14 minutes 

 per liter. 



Lethal air: O, 3.5; CO, 16.0. 



CO, 



CO, + O, = 19.5; = 0.92. Oxygen tension = 2.1. 



O, 



Experiments LXXVI — LXXVII, simultaneous. June 23. 



LXXV7. Weight 580 grams. Bell of 13 liters. 



Began at 1:45. Reduced to a pressure of 16 cm. with current of 

 air at 2:45. Dead at 3:10; 27 minutes after, its rectal temperature is 

 31.5°. 



Lived 1 hour 12 minutes in a volume of air corresponding to 2.6 

 liters at 76 cm., that is, 16 minutes per 1000 grams per liter. 



