Death in Closed Vessels 543 



by a gradual lowering of the pressure lasting an hour and a half 

 The animal was then very weak, and its rectal temperature was 

 only 25°; but three minutes after the animal was restored to nor- 

 mal pressure, the temperature rose to 31°, and the guinea pig could 

 already get up on its feet. This animal survived. 



CATS. Experiments LIX to LXIII, simultaneous. July 11; pres- 

 sure 75 cm. Cats from a month to a month and a half old. 



LIX. Cat weighing 280 grams. Bell- jar of 3.2 liters. Entered at 

 3:15; normal pressure; died at 4:35, without convulsions. 



280 grams lived 1 hour 20 minutes in 2.920 liters of air, which 

 gives per liter and per kilogram 



80 m. 280 



x = 7.7 m. 



2.92 1000 



Lethal air: O* 4.4; CO-' 13.4. 



CO 



CO^ + O-" = 17.8; = 0.81. Oxygen tension = 4.4. 



LX. Weight 380 grams. Bell-jar of 7 liters. 



Began at 3:20; at 3:25, the pressure is 51.2 cm.; cocks closed; died 

 at 4:45. 



380 grams lived 1 hour 20 minutes in 6.62 liters of air at a pres- 

 sure of 51.2 cm.; reducing to 76 cm. of pressure and to 1000 grams, 

 we get the value. 



80 m. 380 80 m x 380 x 76 

 x = = 7.1 m. 



6.62 x 51.2 1000 6.62 x 51.2 x 1000 



76 



Lethal air: O? 7.2; CO^ 11.4. 



COs 



CO- + 0? = 18.6; = 0.81. Oxygen tension = 4.9. 



O 



LXI. Weight 460 grams. Bell-jar of 13.5 liters. 



Began at 3:25; at 3:44, pressure is 21.8 cm. The animal is very 

 sick, 250 respirations per minute. At 4 o'clock, violent convulsive 

 movements, falls back, and dies at 4: 13. 



460 grams lived 29 minutes in 13.04 liters of air at 21.8 cm., which 

 gives 3 minutes per liter at 76 cm. and per 1000 grams. 



Lethal air: O* 15.5; CO* 5.1. 



CO2 



CO2 + 02 = 20.6; = 0.94. Oxygen tension = 4.4. 



O2 



