Sudden Changes in Pressure 867 



At 3:23, is paralyzed in the hindquarters, then falls; in a few 

 minutes, respiration stops, and the heart beats only 20 times per 

 minute; loud gurgles heard in the heart; eye lacks sensitivity, pupils 

 dilated. 



Oxygen administered, but the animal dies at 3:35. (See Exp 

 DXCI.) 



Experiment DXLVIII. November 27. Very small poodle. 



Raised to 7 atmospheres from 3 o'clock to 3:53. 



Decompressed in 2 J /4 minutes. 



Taken from the apparatus, seems gay for a few minutes, then, 

 at 4:10, begins to limp, is paralyzed in the hindquarters, and sud- 

 denly falls on its side. Very loud gurgles in the heart. 



Oxygen administered, but the animal dies at 4:27. (See Exp. 

 DXCII.) 



Experiment DXLIX. December 6. Short-haired dog, very lively. 



Put under pressure from 2:30 to 4:20 and taken to 7% atmos- 

 pheres. 



At 4:20, decompression in 2 minutes. 



Leaves the apparatus. At the end of 10 to 15 minutes, is paralyzed 

 in the hindquarters, and seems quite ill with perhaps gurgling in 

 the heart (?). 



Then recovers a little, but yet cannot stand on its hind legs, which 

 have retained sensitivity. 



December 7. Is still paraplegic and can hardly stand on its front 

 legs. Reflex movements, reflex sensitivity in the hind legs, which are 

 warmer than the front legs. 



December 11. Scab on the left shoulder, on which it is lying; odor 

 of urine; hyperesthesia in the front feet; dying. 



Experiment DL. December 6. Spaniel, placed beside the preced- 

 ing animal. 



Remained in the apparatus from which it was removed para- 

 plegic, with very loud gurgles in the heart. It was given inhalations 

 of oxygen. (See the continuation of its history, Experiment DXCIII.) 



Experiment DLL December 22. Dog. 



Taken to 8V2 atmospheres. Decompressed in 2V2 minutes. 



Taken from the apparatus, is already limp, and dies in 5 or 6 

 minutes. Air in great quantity in the right heart and the veins. Some 

 bubbles in the left heart. Gas in abundance in all the vessels of the 

 lower region of the spinal cord. 



Experiment DLII. January 16. Bitch weighing 6.5 kilos, in bad 

 state generally. 



Taken to 7 1 /2 atmospheres, then decompressed suddenly. No 

 symptom immediate or delayed. 



Experiment DLIIL January 23. Same animal. 



Taken again to IV2 atmospheres and decompressed suddenly. 

 About 10 minutes afterwards, bites its hindquarters, as if it felt keen 

 pains there; it then seems to have some trouble in locomotion, but 

 this disappears quickly. 



