874 



Experiments 

 Table XVIII— Concluded 



Experiment 

 number 



Duration 



of 



compression 



Duration 



of 



Decompression 



DXXXVI | 



DXXVIII 



id. 



| 9V4 I 3 min 



10 | 3 min 



Condition of animal 



DLVIII | 1 hour | 9V 2 



DLIX 



DLX 



DLXII 

 DLXI 



5 hours 



a few min. 



id. 

 10 min. 



Explosion 



Blood drawn at 3 atm. re- 

 leased free gases. Died after 

 a few breaths. Gas every- 

 where. She is pregnant; gas 

 in blood of foetuses and al- 

 | lantois; placenta torn. 

 | 34 cc. of gas drawn from 

 | right heart (CO, 20.8; N 79.2; 

 | 2 traces) . Gas in vessels of 

 | pia mater. 



| Instantaneous death. Huge 

 subcutaneous and submuscu- 

 lar emphysema, gas in belly, 

 in epiploon, the anterior 

 chamber of the eye, the cere- 

 brospinal liquid, the spinal 

 cord. No hemorrhage in spinal 

 cord, brain or lungs. No gas 

 in left heart. Right heart full 

 of gas (CG. 15.2; N. 82.8; G 

 2.0). 



Rapid death; subcutaneous 

 emphysema. Gas all through 

 blood. 



1 m. 45 sec. | Animal of Exp. DLII to DLVI. 

 I Dies. Gas in venous system; 

 I subcutaneous emphysema. 

 | Dies. Gas in veins. 

 | Dies in 12 min. Gas in veins 

 | and left heart. 

 I 



7% I 3 min. 



8V2 I 2 min. 

 8 I IV4 min. 



2. Slow Decompression or Decompression in Stages. 



The preceding data furnish ample material for a fairly complete 

 account of the curious phenomena due to sudden decompression 

 and for an explanation of them. However, there is such variety in 

 the details that it seems best to report in addition a certain number 

 of experiments of the same type, in which, however, the decom- 

 pression was made more slowly, for the purpose of finding out the 

 precautions that must be taken if the decompression is to be 

 harmless. 



Here are these experiments: 



Experiment DLXV. June 20. Guinea pig. From 2:45 to 3:50 

 brought to 10 atmospheres; I establish a current of air under pressure. 



