Compressed Air; O. Poisoning 731 



From 3:43 to 3:58 (15 minutes), I make the dog breathe in a bag 

 containing the same quantity of air as bag a; I call this air b. The 

 animal suffers also at the end of this respiratory period. 



At 4:20, the animal being very quiet, I draw 33 cc. of carotid 

 blood B 



At 4:45, rectal temperature 36.5°. 



At 6 o'clock, drew 33 cc. of blood C 



Immediately after, his temperature is 37°. 



At 6:15, I draw more blood which I treat like x and y z 



Rectal temperature 37°. 



I remove the tracheal cannula; the dog can walk a little. At 

 7: 10, his temperature has risen to 39°. He survives. 



Since the air of the bag contained before the experiment 90.8% 

 of oxygen, and after the experiment, 77.3% of oxygen and 8.4% of 

 carbonic acid, the tension rose to 440, that is, 22 atmospheres of air. 

 Blood A (22 min. after the decompression) contained 2 17.5; C0 2 20.0 

 Blood B (1 hour after the decompression) contained O, 17.2; C0 2 17.0 

 Blood C (2 hours 40 minutes after the decompression) contained 

 O, 16.3; CO, 26.5 



The liquids produced by boiling bloods x, y and z give the follow- 

 ing results: 



5 cc. of the liquid furnished by x (before the compression) dis- 

 color 15 drops of copper reagent. 



5 cc. of the liquid furnished by y (10 minutes after the decom- 

 pression) discolor 35 drops of copper reagent. 



5 cc. of liquid furnished by z (3 hours after the decompression) 

 discolor 15 drops of copper reagent. 



The analyses of airs a and b show that: 



1. In a, before oxygenated compression, the dog consumed in 15 

 minutes 4.89 liters of oxygen, and produced 2.99 liters of CO.; that 

 is, in one hour 15.56 liters of oxygen and 9.98 liters of CO2. 



2. In b, after the compression, the dog consumed in 25 minutes only 

 3.37 liters of oxygen, and produced only 1.88 liters of CO?; that is, 

 in one hour 8.88 liters of oxygen and 4.51 liters of CO,. 



Experiment CCXCIV. February 23. Strong female spaniel. 



Rectal temperature 39°. 



At 2:15, I put a tube into the trachea; the respirations become 

 •very rapid, 110; pulse 120. 



At 2:40, took from the carotid 25 gm. of blood, which is treated 

 as usual in the test for sugar x 



At 2:40, the rectal temperature is 38°. The respiration grows 

 calm, and falls to 40 per minute. 



From 2:45 to 3 o'clock (15 minutes), the animal breathes in a 

 closed bag, containing 47.14 liters of air. The breathing, calm at first, 

 becomes difficult at the end of 7 or 8 minutes. I call the air of this 

 bag a 



At 2:45, the rectal temperature is still 38°. 



At 3:15, put into the apparatus with the oxygen bag. 



At 3:40, pressure is 6 and % atmospheres; decompressed sud- 



