SHORT NOTES ON PROFESSIONAL SUBJECTS. 
151 
fired at the same time and under similar conditions. Both proved inferior in range 
and regularity, the mean results being as follow ;— 
Punshon Gun-cotton Cartridges fired in comparison with Service Gunpowder 
Cartridges at target, 500 yds. range. 
Mean 
radial deviation. 
'■ 
Gun-cotton. 
Gunpowder. 
ft. 
ft. 
1st series, 9 cartridges. 
4-17 
•44 
2nd „ 10 „ . 
2-70 
•47 
Mr. Hahn’s Powder, in comparison with Service Powder . 
For f charge 45 grains ... 
velocity| " f Q l ■■■ 
Hahn’s powder. 
Service powder. 
Observed 
velocity.* 
Mean 
difference of 
velocity. 
Service cartridge 
| II V 
Observed 
velocity.* 
Mean 
difference of 
velocity. 
f.s. 
1060 
1082 
1072 
ft. 
17 
13 
27 
f.s. 
1286 
1267 
ft. 
4 
3 
Mean radial deviation on target at 600 
yards. Charge 46 grains. 
| 2*06 
It // 
— 
•78 
* At 82 ft. from muzzle. 
C. W. YOUNGHUSBAND, Colonel R.A., 
President, Committee on Explosives. 
20. 1 . 71 . 
