868 Experiments 



Experiment DLIV. January 25. Same animal. 

 Taken to 8 atmospheres, and decompressed suddenly. No ap- 

 parent effect. 



Experiment DLV. January 29. Same animal. 



Taken to 8V 2 atmospheres, and decompressed suddenly. 



Experiences a little irregularity and difficulty in the hindquar- 

 ters, but seems very gay, with no uneasiness; no gurgles in the heart; 

 no gas observed in the jugular, which has been exposed. 



Experiment DLV I. February 11. Same animal. 



Compressed to 8 atmospheres and left under pressure 5 minutes, 

 then decompressed in exactly 3 minutes. 



At the fifth minute, after the beginning of the decompression, 

 blood is drawn from the carotid; no gas found in it. 



At the tenth minute, blood drawn from the right heart with a 

 cannula: no gas there either. 



No symptom. 



Experiment DLVII. February 12. Sickly dog, very thin, weigh- 

 ing 8 kilos. 



From 4:30 to 5:32, taken to 8 atmospheres; decompressed in 3 

 minutes. 



Placed on the floor, does not seem at all uneasy, and walks. 



At 5:42, the hindquarters become stiff and motionless. 



At 5:55, the forequarters are similarly affected; great respiratory 

 distress. 



Dies at 6:05. Air in the veins. 



Experiment DLVIII. February 27. Poodle weighing 7 kilos. 



Placed in the apparatus at 8 o'clock in the morning, at 9:30 is 

 at 10 atmospheres; the pump is stopped. 



At 10 o'clock, the pressure is only 9%. 



At 10:30, I look at the animal; it is well, and puts its nose against 

 the porthole; the pressure is 9 ¥2 atmospheres. 



I enter the laboratory again, and immediately a violent explosion 

 is heard. The porthole glass has burst and its fragments had enough 

 force to cut a lead water pipe one meter away; the apparatus was 

 lifted, torn from its supports by the recoil, and overthrown. 



I take the animal out with great difficulty, for it has become 

 cylindrical, and is hard to pull through the door. General sub- 

 cutaneous intra- and submuscular emphysema. I open the belly; the 

 gas which distends it escapes whistling. 



The right heart is full of gas, as are all the veins, the pulmonary 

 artery, and the pulmonary veins. But there is none in the left 

 auricle or the aorta. There is gas in the anterior chamber of the eye, 

 and in the cerebro-spinal liquid. The nerve fibres of the spinal cord 

 are dissociated by bubbles of gas, which are not in the vessels. 



There is no hemorrhage in the brain or the cord; the lungs are 

 a little congested: no blood in the trachea. 



I extract 50 cc. of gas from the right heart (there is much more 

 of it) taking all precautions to prevent entrance of air. This gas con- 

 tains per 100 parts: O, 1.9; CO, 15.1; N 83.0. 



