Sudden Changes in Pressure 877 



Abundant foam in the stomach and intestine, but not enormous 

 or dangerous from its volume. Foam in the bronchi: lungs healthy, 

 without congestions and effusions. 



Experiment DLXXV. August 8. Dog taken to 10 atmospheres, 

 and bled of 133 cc. (See Exp. CLXXXVI.) 



Decompressed in 50 minutes, very regularly, that is, about 5 min- 

 utes per atmosphere. 



Normal pressure established at 7:30. 



At 7:35, very loud gurgling heard in the heart. The animal, 

 when placed on the floor, is paralyzed in the hindquarters and the 

 ribs. Rectal temperature 39°. 



8:30, very loud gurgling on the right, much less on the left; 

 progressive paralysis; the animal is conscious and raises its head 

 when called; rectal temperature 36°. 



9:30, state still more serious; temperature 35°; the eyes are al- 

 most the only movable parts. Still loud gurgling on the right, less 

 on the left. 



Found dead the next day. 



Experiment DLXXVI. August 9. Dog. 



Taken from 8 o'clock to 9:12 to 10 atmospheres; seems to undergo 

 a sort of convulsive struggling in the apparatus. 



Decompressed very regularly in 1 hour and 30 minutes, that : : s, 

 10 minutes per atmosphere. 



Taken out at 10:42, gay and well. 



At 10:47, the left front leg stretches out, then is paralyzed in 

 movement but remains sensitive. 



At 10:50, the animal falls, the right hind leg is stretched out, 

 paralyzed in movement. 



10:55, this leg is better, but the left hind leg is .affected in its turn. 



11 o'clock, the whole left side is paralyzed, but sensitive. 



Experiment DLXXV II. October 25. Vigorous dog placed free in 

 the large apparatus. 



From 2:30 to 4 o'clock, the pressure is taken to 10 atmospheres. 

 About 3:50 the dog, which has howled all the time it has been in 

 the apparatus, is seized by an attack of tonic and clonic convulsions 

 which lasts some 20 seconds. 



After this, it remains weak and staggering for some minutes. 



At 4:10, the animal seems well; decompression is made by pass- 

 ing abruptly from 10 atmospheres to 8, from 8 to 6, from 6 to 4, from 

 4 to 2, from 2 to 1. At each stage, a pause of 15 minutes is made. 

 The whole decompression lasts 1 hour and 10 minutes. 



No symptom has appeared during the decompression. The 

 cylinder is opened, and the animal comes out freely. But after 2 or 3 

 minutes, it utters cries of pain. 



At 5:45, it lies down; the hindquarters are stiff; when it is forced 

 to stand up, it lifts the left front foot, which seems to give it pain. 



At 6: 15, is howling less, but is still in the same state. 



Well the next day. 



