274 
CAPTAIN NOBLE AND MR. F. A. ABEL ON FIRED GUNPOWDER. 
Experiment 193.—Fired 5960 grs. = 386'2 grins, mining powder in cylinder No. 6, 
containing 14,900 grs. 
Temperature of gas=55°*5 F. = 13°T C. Bar. 30 , 025 = 762 , 35 millims. 
Amount of gas = 27 7/, 94— 8 ,/ \35 = 19 ,/, 59. 
= 444'8 X 19*59-f-18 cub. inches. 
= 8731 '63 cub. inches. 
= 143,076'49 cub. centims. at 13°T C., and 762‘35 millims. 
= 143,518'9 cub. centims. at 13°T C., and 760 mi llim s. 
= 136,944 - 2 cub. centims. at 0° C., and 760 millims. 
= 354 - 6 times original volume. 
Experiment 194.—Fired 4650 grs. (301'3 grms.) mining powder in cylinder con¬ 
taining 15,500 grs. 
In letting the gas escape, found for the first time that the gas lighted, giving rise 
to an intensely suffocating smell of sulphurous acid, showing, as was indeed otherwise 
apparent, that sulphydric acid was present in large quantities. Sealed up gases for 
examination. 
Did not take out the deposit as usual, but after the gases had escaped, filled the 
cylinder, by displacement, with distilled water, entirely freed from air by long boiling. 
On the water touching the deposit it decrepitated with considerable sharpness. 
When the cylinder was full it was entirely sealed, and reopened after an interval of 
about 48 hours. The solution was then decanted into bottles, freed from oxygen, and 
sealed for examination. 
< 5 . A. a. Crush. Pressure. 
•30 ’0833 '0417 '015 5'04 tons per square inch. 
Experiment 195.—Fired 5960 grs. = 386*2 grms. Curtis and Harvey’s No. 6, in 
cylinder No. 6. 
Temperature of gas = 60 o, 8 F. = 16 c, 0 C. Bar. 30" , 430 = 772 , 9. 
Amount of gas =444‘8X 13 T 0 + 18 cub. inches. 
= 5,844'88 cub. inches. 
= 95,774'2 cub. centims. at 772*9, and 16 o- 0 C. 
= 97,399'8 cub. centims. at 16 o, 0 C. and 760 millims. 
= 92,004 - 6 cub. centims. at 0° C. and 760 millims. 
= 238'23 vols. 
Experiment 196. —Fired 4650 grs. = 301’3 grms. Curtis and Harvey’s No. 6, in 
cylinder containing 15,500 grs. Took all the precautions described in experiment 
194 ; observed gas issuing from vessel would not light. 
a . 
•0417 
Pressures. 
5’04 tons per square inch. 
8 . 
•30 
A. 
•0833 
Crusher. 
•015 
