396 



MR. J. E. PETAVEL ON THE PRESSURE OF EXPLOSIONS. 



TABLE XII. (Record No. F 69.) 



Cylindrical explosion vessel ; charge all in one-sixth of cylinder near the recorder ; gravimetric density 

 0-1004 : diameter of cord 0-475 inch (12-07 millims.) ; temperature 18 C. 



Maximum pressure 906 atmospheres (5 94 tons per square inch) ; time required to reach 

 the maximum pressure 70 second. 



Pressure in atmospheres. 



906 

 896 

 869 

 850 

 671 

 562 

 456 

 364 



TABLE XIII. (Record No. F 70.) 



Cylindrical explosion vessel; charge all in one quarter of cylinder near the recorder; gravimetric 

 density 0-0753 ; diameter of cord 0~035 inch (0'89 millim.) ; temperature 17 '0 C. 



Maximum pressure 764 atmospheres (5-01 tons per square inch) ; time required to reach the 



maximum pressure 0'007 second. 



