Gases of the Blood 619 



5:15, drew 36.7 gm. (cc?) of very red blood; gases escape in the 

 syringe, and the blood begins to coagulate very quickly . . . . B 



Brought in 2 minutes to 6 atmospheres, and kept at this pressure 

 under a current of air; at 5:45, drew 39.7 cc. of blood a little less 

 red; no free gas . . . . C 



Brought suddenly to 3 atmospheres, and kept under a current 

 of air. 



6:33, drew 38.2 cc. of blood; no free gases . . . . D 



Decompression made slowly. At 7 o'clock, the animal is well; it 

 survives without ill effects. 



Blood A (1 atm.) contains per 100 volumes: O^ 19.4; CO 35.3; N 2.2 

 Blood B (10 atm.) contains per 100 volumes: O 24.6; CO 36.4; N 11.3 

 Blood C (6 atm.) contains per 100 voolumes: O2 23.7; CO 35.6; N 8.1 

 Blood D (3 atm.) contains per 100 volumes: O 20.9; CO- 35.1; N 4.7 



Experiment CLXXXIII. July 27. Female dog weighing 9 kilos. 



Drew 29.5 cc. of blood from the carotid .... A 



Put into compression apparatus; before each blood extraction, I 

 maintain the determined pressure, under a current of air, for several 

 minutes. 



3:21, drew 29.5 cc. of blood at 2 atmospheres . . . . B 



3:48, drew 34.3 cc. of blood at 5 atmospheres . . . . C 



4:35, drew 38.2 cc. of blood at IV2 atmospheres . . . . D 



Up to this time, no discharge of gas in the syringe. 



5:15, drew 30.7 cc. of blood at 10 atmospheres; here, small bubbles 

 of gas .... E 



Decompressed in 30 minutes; died. 



The rest of its story will be told in Chapter VII. 

 Blood A (1 atm.) contains per 100 volumes: 0= 18.3; CO^ 37.1; N 2.2 

 Blood B (2 atm.) contains per 100 volumes: O 19.1; CO 37.7; N 3.0 

 Blood C (5 atm.) contains per 100 volumes: O 20.6; CO? 40.5; N 6.1 

 Blood D (7V2 atm.) contains per 100 volumes: O 21.1; CO^ 36.8; N lost 

 Blood E (10 atm.) contains per 100 volumes: O- 21.4; CO 36.8; N 11.4 



Experiment CLXXXIV. August 5. Female dog weighing 11 kilos. 



Drew 29.5 cc. of blood from the carotid .... A 



Put into the apparatus at 5:33. Same precaution as in the pre- 

 ceding experiment. 



5:53, 3 atmospheres; drew 29.5 cc. of blood; the discharge of gas 

 is evident . . . . B 



6:28, 6 and 3 A atmospheres; drew 29.5 cc. of blood; further dis- 

 charge of gas . . . . C 



The animal cries and whimpers. 



7:10, 9V4 atmospheres; drew 36 cc. of blood; gas in abundance . . D 



The cock of the cannula is opened wide; there issues 250 gm. of 

 very red blood, which coagulates immediately; much gas is discharged. 



Decompressed rapidly, the animal dies immediately. The rest of 

 its story in Chapter VII. 



Blood A (1 atm.) contains per 100 volumes: O? 18.4; CO* 47.7; N 2.5 

 Blood B (3 atm.) contains per 100 volumes: O 20.0; CO 42.2; N 4.4 

 Blood C (6% atm.) contains per 100 volumes: O2 21.0; CO2 41.3; N 7.1 

 Blood D (9y 4 atm.) contains per 100 volumes: O 21.2; CO 39.8; N 9.3 



