534 
(a) 185 1b. G.C. charge at 
143 ft. 8 cms. = .001 sec, 
(Note pairs of dots on 
rising pressure line). 
Sheet 
(b) 
185 lbs. G.C. at 13 feet. 
8 ams. = .001 second 
(Note dots on rising 
press). 
(a) edSaadibee Gs. 
Strip and Circular (7") 
gauges Hroadside-on at 
15* and 20 feet. 
Empty primer tin 2 feet 
above charge, 
(Note (i) dotted rise 
of pressure 
(ii) irregularities due 
to empty primer tin). 
es 
100 lbs. T.N.T. (Block 
Filled), 
Strip Broadside 36 ft. 
Oar Broadside 42 ft. 
1.35 ams. = 2001 sec. 
Record on Oscillograph A. 
(a) 
PEC eC SS] 
(x) 185 lbs. G.C. 
Two circular 7" gauges 
Edge-on at 15' and 
Broadside on at 20 feet 
respectively. 
(Note H.F. Dots on rising 
pressure). 
tees | 
(>) 100 lbs. T.N.T. (Block 
Filled). 
Oar Edge-on 36 ft. 
1.3 ams. = .001 sec, 
Record on Oscillograph B. 
( (a) and (b) are records of same shot). 
(g) Effect of Air Cavity (h) 
near charge, 185 lbs G.C. 
Strip Broadside 15 ft. 
Oar Broadside 20 ft. 
(Note effect of empty 2 
gall. petrol tin at 2 ft. 
abcve charge). 
w 
Ral 
185 lbs. G.C. 
Oar Broadside 15 ft. 
Strip Broadside 20 ft, 
(The charge in this case 
was lashed to a spar of 
soft wood). 
IM 
