Petavel, Htgh-P res sure Explosio7is. 



J'ABLE 1. 



See Plate lo, Fig. 3. (Film 41, Explosion No. 181). 

 Spherical Enclosure, 4" diameter. 

 Capacity, 55i"9t c.c. =o'oi95 cub. ft. 



Temperature of Enclosure before firing iS'-'C. 



„ ,, after products of combustion had 



cooled 24^C. 



Initial Pressure... ... 77*3 Atms. = 1,136 lbs. per sq.inch. 



Ratio of Air to Gas ... ... ... =6"o 



Maximum Explosive Pressure 647 Atms. ^ 9,508 lbs. per sq. inch. 

 Ratio of Maximum Explosive 

 Pressure to Initial Pres- 

 sure ... ... ... ... =8'4 



Residual Pressure ... 63'8 Atms. = 937 lbs. per sq. inch. 



Analysis 0/ Resiihie. 

 Carbon dioxide... ... 9*8% 



Oxygen 3-0% 



Nitrogen ... ... 87-2% 



ioo-o% 



