730 Experiments 



Experiment CCXCI. February 5. Terrier, medium size, fasting 

 since the preceding evening. 



Rectal temperature 39.5°. 



At 5 o'clock, put into the apparatus with the muzzle and the 

 oxygen bag. 



At 5:40, pressure is 7 and Vz atmospheres. 



From 5:40 to 5:45, decompression. 



Is in strong convulsions, with violent snapping of the teeth. 

 Temperature 38°. 



Dies at 6 o'clock. 



The air of the bag, after the experiment, contained 77.2% of 

 oxygen and 8% of carbonic acid. 



The oxygen tension had been about 560, corresponding to 28 

 atmospheres of air. 



Experiment CCXCII. February 7. Vigorous poodle. 



Temperature 39.8°. 



Took blood from the carotid to analyze for sugar a 



At 4 o'clock, muzzle and oxygen bag; the compression begins. 



At 4:43, the pressure is 7% atmospheres; rapid decompression. 

 Taken out of the apparatus, the dog has 2 or 3 convulsions; its tem- 

 perature is 38°; it dies while we are drawing a little very dark arterial 

 blood, which is treated with sulfate of soda b 



a and b are treated in the same way, with the same addition of 

 water and according to the method of CI. Bernard. Now 5 cc. of 

 the filtered liquid furnished by a reduce only 10 drops of copper 

 reagent, while the same volume of the liquid in b reduces 15. 



The air of the bag before the experiment contained 90% of 

 oxygen. After the experiment, there was only 76.5% with 10.7% of 

 carbonic acid. 



The oxygen tension had therefore risen to about 600, which cor- 

 responds to 30 atmospheres of air. 



Experiment CCXCIII. February 18. Dog weighing 10 kilos, fast- 

 ing since the morning of February 17. Rectal temperature 40°. 



At 1:30, I put a tube in its trachea. 



At 2 o'clock, its rectal temperature is only 39.8°. 



From 2:05 to 2:20 (15 minutes), I force it to inspire and expire 

 in a rubber bag containing 41 liters of air; towards the end, the ani- 

 mal experiences a certain respiratory difficulty, takes great inspira- 

 tions, and struggles a little. I call the air of this bag a. 



At 2:45, I take 25 gm. of blood from the carotid and mix it with 

 25 gm. of sulfate of soda and 10 gm. of distilled water . . . . x 



At 2:55, put into the compression apparatus, with the oxygen 

 bag, in which is a little alkalinized water. 



At 3:16, pressure is 5% atmospheres; decompression in 2V2 min- 

 utes. The dog displays only slight convulsions, lasting hardly quarter 

 of an hour. He has salivated very abundantly; his temperature is 38°. 



At 3:25, drew 25 gm. of carotid blood which is treated like 

 blood x y 



At 3:40, drew 33 cc. of blood; the animal' has been breathing 

 quietly for some time A 



