146 
CAPTAIN NOBLE AND ME. E. A. ABEL ON EIEED GUNPOWDER. 
One minute after firing, the cylinder was placed at an angle of 45°. Forty-five 
seconds later the position of the cylinder was reversed. Cylinder quite tight. On 
opening, it was found that one minute after explosion the 
deposit had just commenced to congeal on the top, a thin 
crust having been formed, which was broken through 
when the cylinder was returned to its original position ; 
but a considerable portion of the crust was left. The 
sharpness with which the cylinder had struck its rest had 
made the deposit run up the side, as at a. Hence, a minute 
after explosion, the deposit was in a very fluid state, but 
had just begun to set. It could not, as evidenced by the 
mark at a, have been viscid. Forty-five seconds later the 
deposit was perfectly set. Colour dark grey with a dark 
olive-green hue. A few cavities in the deposit. 
% A a Crush, copper Pressure 
cylinder. in tons. 
•7000 -0833 -0417 -216 19-54 
Experiment 42, December 4, 1872. — Fired 5320 grs. (344 - 736 grms.) F. G. in cylinder 
No. 7. 
Cylinder tight, but slight smell of SH 2 . On opening the cylinder, the nose of the 
crusher-plug was found to have broken off, and it lay loose on the top of the deposit, 
showing that it must have fallen off after the deposit was solid. Crusher covered with 
slight deposit and numerous small crystals, apparently sulphide of iron. Deposit 
more like that of P. and R. L. G. than formerly. The bottled residue smelt most 
powerfully of ammonia, too powerfully to hold to the nose. 
^ A a Crush, copper Pressure 
cylinder. in tons. 
•7000 -0833 -0417 -197 18-2 
Experiment 43, December 5, 1872. — Fired 6080 grs. (393-984 grms.) pebble powder 
in No. 7 cylinder. 
Cylinder perfectly tight. 
j. Crush, copper Pressure 
cylinder. in tons. 
•8000 -0833 0833 T26 28-6 
Experiment 44, December 6, 1872. — Fired 6080 grs. (393-984 grms.) R. L. G. in 
cylinder No. 7. 
A small quantity of gas leaked shortly after explosion. Deposit had a great many 
bright crystals (sulphide of iron) diffused through it. 
A. a. 
d. 
•8000 
•0833 
•0833 
Crush, copper 
cylinder. 
TOO 
Pressure 
in Ions. 
24-4 
