141 
a 
eel sect alta Pha vealed AY 
lt ae 
a Ps Hes 
Ae ie Se) 
Pa OU 
hl EE RGnnnne 
| 
Bee anaes eee 
Pe ttt 
Oi ne DS} 
ee a Pa 
bi ied ieee eMac. 
THOUSANDTHS OF A SECOND 5 
Fig. 28. 320 lbs. cf 40/60 Amatol surrounded by an air chamber (H2, Table VIII.); average of Shots 
20, 49, 53, 57; gauges 50 feet from centre of charge; saxisum pressure = .7%6. 
TONS PER SQUARE INCH 
POSITION of CHARGE C and GAUGES G 
(DISTANCES in FEET) 
SURFACE 
i ee 41% 
gba UL 
TONS PER SQUARE INCH 
THOUSANOTHS OF A SECOND 
Fig. 29. 820 lbs. of 40/60 Amatol (X7, Table VIII); average of Shots 34, 37, 48, 52; gauges 59 feet from 
centre of charge; maximum pressure = .79; the broken line shows the effect of an 820 lb. charge 
at tais distance calculeted from tne curve in Fig. 1. 
