604 Experiments 



At 3:40, pressure lowered 30 cm.; at 3:55, the same; drew 34.5 

 cc. of blood; animal quiet, but had been uneasy . . . . C 



At 4 o'clock, pressure lowered 40 cm.; animal in the same condi- 

 tion; drew 34.5 cc. of dark blood . . . . D 



Blood A (76 cm.) contains per 100 volumes: O^ 17.4; CO 33.8 

 Blood B (56 cm.) contains per 100 volumes: O 15.5; CO 28.0 

 Blood C (46 cm.) contains per 100 volumes: O 12.5; CO2 26.4 

 Blood D (36 cm.) contains per 100 volumes: O2 10.8; CO 22.8 



Experiment CLXXVI. May 22. Pressure 76 cm. Medium-sized dog, 

 which had eaten at noon. Right carotid. 

 At normal pressure, 13 respirations. 

 3:35. Put into apparatus. 

 4:05, pressure lowered 40 cm., maintained. 

 4:07, 15 respirations, somewhat irregular. 

 4:25, the same; drew 33.3 cc. of blood, very dark .... A 

 4:33, air admitted; pressure lowered 20 cm. 

 4: 50, drew 33.3 cc. of blood, redder than A .... B 

 4:55, normal pressure. 



5:25, drew 33.3 cc. of blood, quite red .... C 

 Blood A (36 cm.) contains per 100 volumes: 0^ 9.6; CO 33.9 

 Blood B (56 cm.) contains per 100 volumes: O 12.4; CO 35.0 

 Blood C (76 cm.) contains per 100 volumes: O 16.9; CO 45.7 



Experiment CLXXVII. June 21. Female dog of average size, never 

 having been used before. Cannula in the right carotid artery. 

 4:15, decompression begun. 



4:45, decompression of 54 cm.; great uneasiness from the begin- 

 ning. 



5:15; 56.5 cm.; 120 respirations. 



5:30; 57.5 cm.; I draw 50 cc. of blood, very dark A. 



Air admitted until the decompression is only 36 cm., then the 

 decompression is resumed. 



6:08, pressure down 50 cm.; I draw 35 cc. of blood, very dark. . B 



6:20, 56 cm.; 40 cc. of blood, also very dark . . . . C 



6:20, air admitted; normal pressure restored at 6:55. 



7: 10, drew 57 cc. of blood, quite red . . . . D 



Blood A (19 cm.) contains per 100 volumes: O 4.9 



Blood B (26 cm.) contains per 100 volumes: O 6.5 



Blood C (21 cm.) contains per 100 volumes: O 4.5 



Blood D (76 cm.) contains per 100 volumes: 0= 14.8; CO 22.1 



Experiment CLXXVIII. July 3. Dog which has never been used, 

 weighing 11 k. 



2:30, I draw from the right carotid 35 cc. of blood moderately red; 

 the animal howls and struggles .... A 



2:40, decompression begins. 



3 o'clock, decompression of 55 cm. 



3: 11, decompression of 57 cm.; drew 35 cc. of blood, very dark . . B 

 Admitted air. 



Blood A (76.5 cm.) contains per 100 volumes: 19.2 of oxygen. 



Blood B (19.5 cm.) contains per 100 volumes: 4.2 of oxygen. 



