CAPTAIN NOBLE AND ME. P. A. ABEL ON PIEED GUNPOWDER. 
149 
Amount of deposit = 1900 grs. (123 , 120 cub. centims.). 
a. a. 
■8000 -0833 
a. 
•0417 
Crush, copper 
cylinder. 
•265 
Pressure 
in tons. 
23-2 
Experiments 50 to 52. — These experiments were undertaken to measure the volume 
of gas produced by the explosion of a given weight of powder. The gas was allowed 
to escape into a gasometer charged with a saturated saline solution ; but as it was found 
that a considerable quantity of gas was absorbed by the water, this apparatus was 
replaced by the more perfect one described in the body of the paper. 
Experiment 53, February 6, 1873. — Fired 5960 grs. (386 - 2 grins.) P. powder in 
cylinder No. 6 ; measured the quantity of gas produced. 
Quantity of gas produced 112,455’5 cub. centims. 
Temperature of gas when measured . . . . 18 0, 3 C. 
Barometric pressure 767 millims. 
Experiment 54, February 7, 1873. — Fired 
same arrangements as in last experiment. 
Quantity of gas measured . . . 
Temperature of gas when measured 
Barometric pressure 
5960 grs. (386*2 grms.) P. powder with 
. . . . 110,633-4 cub. centims. 
. . . . 17°-2 C. 
. . . . 770 millims. 
Experiment 55, February 8, 1873. — Fired 5960 grs. (386 - 2 grms.) R. L. G. with 
same arrangements. 
Quantity of gas measured . . . . 
Temperature of gas when measured 
Barometric pressure . . . 
110,26 9 '6 cub. centims. 
16°-0 C. 
774 millims. 
Experiment 56, February 10, 1873. — Fired 5960 grs. (386'2 grms.) F. G. under 
same conditions. 
Quantity of gas measured 104,875‘3 cub. centims. 
Temperature of gas 15 o, 0 C. 
Barometric pressure 775 millims. 
Experiment 57, February 11, 1873.— Fired 5960 grs. (386*2 grms.) F. G. under 
same arrangements. 
Quantity of gas measured 
Temperature of gas . 
Barometric pressure 
103,345’2 cub. centims. 
13°-3 C. 
768 millims. 
