150 
CAPTAIN NOBLE AND ME. E. A. ABEL ON EIEED GUNPOWDER. 
Amount of deposit measured, and found to occupy a space of 115-34 cub. centims,. 
The deposit appeared not to have contracted much after solidification ; but it had 
parted from the side, leaving a crack about 0-04 in. (1 millim.) wide. 
Experiment 58, February 12, 1873. — Fired 5960 grs. (386-2 grms.) R. L. G. Same 
arrangements. 
Quantity of gas measured 107,354-5 cub. centims. 
Temperature of gas 14° - 5 C. 
Barometric pressure 772 millims. 
Deposit occupied a space of. . . . 110 ‘8 cub. centims. 
Experiment 59. — Experiment on mode of closing firing-plug. 
Experiment 60, March 5, 1873. — Fired 5960 grs. (386-2 grms.) P. 
Quantity of gas 114,059-7 cub. centims. 
Temperature of gas 19° C. 
Barometric pressure 765 millims. 
Deposit occupied a space of. . . . 111-78 cub. centims. 
Experiment 61, March 6, 1873. — Fired 5960 grs. (386*2 grms.) R. L. G. 
Quantity of gas 111,367-5 cub. centims. 
Temperature of gas 15 0- 94 C. 
Barometric pressure 755-6 millims. 
Deposit occupied a space of. . . . 105-30 cub. centims. 
Experiment 62. — Fired 5960 grs. (386‘2 grms.) F. G. 
Quantity of gas 108,881-8 cub. centims. 
Temperature of gas 19°-61 C. 
Barometric pressure 739 -4 millims. 
Deposit occupied a space of. . . . 108-5 cub. centims. 
Experiment 63. — Fired 3800 grs. (246-286 grms.) R. L. G. to determine heat. 
Cylinder quite tight. 
Cylinder weighed 72,688 grms. 
Water „ 15,655-4 „ 
Temperature of cylinder before explosion . . 51°-4 F. (10 o, 72 C.) 
„ water „ „ . . . 51-65 F. 
„ room 52 - 5 F. 
The heat generated raised the temperature of water and cylinder to 64°-25 F. 1 
Hence steel raised through 12°-25 F.=7°T39 C. ; water through 12°-6 F. = 7°-0 C. 
