) Experiments 



is seized by paralysis of the hindquarters; he soon remains lying 

 down, and his sufferings are shown by howls. 



Taken to 7 atmospheres again, and then to an extremely slow 

 decompression. (See Exp. DLXXXVII.) Dies in the evening. 



Experiment DXXXIX. October 20. Dog. 



Subjected to 3% atmospheres. Arterial blood drawn under mer- 

 cury in a test tube. Very small bubbles of gas are plainly escaping, 

 and collecting at the upper part of the tube. 



Decompressed in 1 minute, shows no symptom; the heart sounds 

 are normal. 



Experiment DXL. October 23. Same animal taken to 4% atmos- 

 pheres, and left 10 minutes. Decompressed in 1V4 minutes, expe- 

 riences no symptoms immediate or delayed. 



Experiment DXLI. October 25. Same animal taken to 5 atmos- 

 pheres; left 10 minutes and decompressed in 1% minutes. Still no 

 symptom. 



Experiment DXLII. October 31. Dog. 



Taken to 7% atmospheres. Decompressed in 1V4 minutes. Taken 

 out at 2:07, without immediate symptoms. 



At 2:15, is found weak, staggering, has vomited several times. At 

 2:35, enormous gurglings heard in the heart, and the animal dies 

 suddenly. 



Gas in the heart and the whole venous system, even the portal 

 vein. Nothing in the left heart. 



Experiment DXLIII. October 31. Dog. 



Placed beside the former; has no immediate symptom. But at 

 2:15 is found lying on its side motionless; respiration is difficult, 

 whistling, as if the animal were going to die soon. There are gurglings 

 in the heart. 



He is made to inhale oxygen (See conclusion, Exp. DLXXXIX). 

 He dies during the night. 



Experiment DXLIV. November 12. Dog. 



Taken to 7 x /4 atmospheres. Decompressed in 2 minutes. Dies in 

 about 25 minutes. Free gas in all the little veins; right heart full of 

 foam; bubbles less numerous in the left heart. 



Experiment DXLV. November 12. Dog. 



Placed beside the former. Seized by symptoms of paralysis and 

 dies after about 1% hours, after he has been given oxygen. (See 

 Exp. DXC.) 



Experiment DXLVI. November 15. Dog. 



Taken to 6V2 atmospheres; decompressed in 4 ¥2 minutes. No 

 symptom; no gas in the blood of the jugular vein, which I examined 

 with the microscope to make more certain. 



Experiment DXLVII. November 25. Bitch. 

 From 2:25 to 3 o'clock taken to 7Y2 atmospheres. 

 At 3:14, decompressed in 2 V2 minutes. 



