Death in Closed Vessels 



573 



slight respiratory movements. Red blood in the jugular. Red spots 

 in the cranial diploe. 



Lethal air: CO* 16.7; O 28.6. 



CO* tension = 16.7 x 1.5 = 25.1. 



The original oxygen tension must have been about 46 x 1.5 = 69, 

 corresponding to 3.3 atmospheres. 



Experiment CXLV. February 20. 



At 5V2 atmospheres, 4 of which are oxygen. 



After 5 minutes, trembles, the head oscillates. After 10 minutes 

 great convulsions, the feet are doubled against the belly; the convul- 

 sions last 5 to 10 minutes, then the feet stretch out repeatedly. The 

 bird remains prostrated; after 20 minutes, dead. 



Enormous cranial suffusion. Rectal temperature 26.5°. 



Lethal air: CO* 1; O* 82.5. 



CO* tension: 5.5. 



The oxygen tension in the original mixture was about 85 x 5.5 = 

 467.5, corresponding to 22.3 atmospheres. 



Experiment CXLVI. February 22. 



Raised to 2V2 atmospheres, of which V2 is oxygen. 



Closed at 12:55; dead at 3:55. Bloody suffusions in the thickness 

 of the cranial diploe; red blood in the jugular vein, rapidly becomes 

 black. 



Lethal air: COa 11.1; O* 33.3. 



CO* tension = 11.1 x 2.5 = 27.7. 



The original oxygen tension was about 46 x 2.5 = 115.5, which 

 corresponds to 5.5 atmospheres. 



The results of these experiments are grouped in Table VIII, fol- 

 lowing the increasing order of the oxygen tensions. 



Table VIII 



