630 Experiments 



ing from 130 to 150 liters of air; at the expiration as at the inspira- 

 tion, the air bubbled through a potash solution intended to rid it 

 of its carbonic acid, in which, let me say in passing, I was not 

 entirely successful: the air of the bag always contained from 1 to 2 

 per cent of this gas. 



Figure 37 shows the set-up of the experiment. The inspired air 

 and the expired air pass through the flasks A and B, where a 

 potash solution acts as a valve; in A, the tube which communicates 

 with the dog ends at the top of the flask; through it the inspiration 

 is made; in B, it descends and dips down a little into the liquid; 

 through this the expiration is made. 



The experiment having been set up in this way, from time to 

 time I took samples of air from the bag and blood from the carotid 

 for analysis. 



Here are the results of some experiments. 



Experiment CLXXXVII. April 1; mastiff dog, weighing 11 kilos. 

 Bag containing 137 liters of air. Temperature 15°. Experiment begun 

 at 2:35. 



2:36; 16 respirations; pulse 144; arterial pressure varying from 

 12.5 cm. to 17 cm.; rectal temperature 39°. Took 25 cc. of blood from 

 the carotid, light red; contains per 100 cc. 19 of oxygen and 48 of 

 carbonic acid. 



The animal is very calm and remains very calm all through the 

 experiment. 



2:55; respirations, 16; pulse, 96. 



3 o'clock; took air from the bag; contained 2 18.1; C0 2 0.8. 

 3:05; respirations, 15; pulse, 78; temperature 39°. Took 25 cc. of 



blood, very red; contained 2 17.0; CO, 49.0. 



3:30; respirations, 20, long; pulse, 64; pressure of 13 cm. to 20 cm.; 

 temperature 38.8°. . • 



3:35; took air from the bag; contained O, 15.9; CO, 1.0. Took 

 25 cc. of blood, red; contained O, 15.0; CO, 46.5. 



4 o'clock; respirations, 12; pulse, 52; temperature 38.5°. 



4:05; air contained 2 14.1; CO, 1.3. Took 25 cc. of blood, less 

 red; contained 2 13.6; CO, 46.3. 



4:20; cardiac pressure from 11 to 18 cm. 



4:30; respirations, 12; pulse, 40; temperature 38.2°. Air contained 

 O, 12.2; CO, 1.7. Took 25 cc. ofblood; analysis lost. 



5 o'clock; respirations, 12; pulse, 40; temperature 38.0°. 



5:10; air contained O, 9.6; CO, 2.0. Blood 25 cc, still quite red; 

 contains 2 12.0; CO, 46.3. 



5:20; pressure from 12 to 18 cm. 



5:36; respirations, 12; pulse, 64, very irregular; temperature 37.5°. 

 Air from the bag contained 2 7.1; CO, 2.2. 



6 o'clock; respirations, 14; pulse, 104; temperature 37.5°. Took 

 blood, 25 cc, quite dark; contained 2 7.1; C0 2 42.8. 



6:10; air of the bag contained 2 5.9; CO, 2.1. 



