120 
SHOUT NOTES ON PROFESSIONAL SUBJECTS. 
73. 
Captain W. II. Noble, E.A., 6. 1. ’70, submits tbe following Electro-Ballistic 
experiments for record:— 
Nature of Gun. 
Calibre. 
Length 
ofbore in 
calibres. 
Charge. 
Projectile. 
Mean 
Nature. 
Mean 
weight. 
Mean 
diameter. 
initial 
velocity. 
ins. 
lbs. 
lbs. 
ins. 
ft. 
12-inch M.L. of 25 tons 
12-0 
12-0 
67 - 
Palliser. 
600 
11-92 
1180 
// 
// 
II 
67 
Com. shell. 
495 
„ 
1271 
// 
// 
n 
50 
Com. shell. 
ii 
ii 
1140 
10-inch M.L. of 18 tons. 
10-0 
14-5 
60 
Palliser. 
400 
10-92 
1298 
" 
// 
II 
40 
Com. shell. 
n 
n 
1117 
9-inch M.L. of 12 tons. 
9 
13-9 
43 
Palliser. 
250 
8-92 
1336 
// 
n 
II 
30 
Com. shell. 
n 
8-92 
1192 
8-inch M.L. of 9 tons. 
8 
14*8 
30 
Palliser. 
180 
7*Q2 
1363 
// 
// 
a 
20 
Com. shell. 
n 
7-92 
1165 
7-inch M.L. of 7 tons. 
7 
18-0 
22 
Palliser. 
115 
6-92 
1458 
n 
// 
" 
14 
Com. shell. 
Ii 
6-92 
1258 
7-inch M.L. of 6£ tons. 
7 
15-9 
22 
Palliser. 
115 
6-92 
1430 
n 
II 
n 
14 
Com. shell. 
n 
6-92 
1230 
64-pr. M.L. of 64 cwt. 
6-3 
15-6 
8 
Com. shell. 
64 
6-22 
1170 
7-inch B.L. of 82 cwt. 
7 
14*2 
10 
n 
110 
7-09 
1013 
n 
a 
n 
11 
ii 
90 
7-09 
1165 
64-pr. B.L. of 61 cwt. 
6-4 
10-9 
9 
it 
64 
6-48 
1200 
40-pr. B.L. of 35 cwt. 
4-75 
22-4 
5 
ii 
41 
4'8 
1180 
20-pr. B.L. of 16 cwt. 
3’75 
22-4 
2 lbs. 8 ozs. 
it 
21 
3-8 
1130 
(land service.) 
20-pr. B.L. of 13 cwt. 
3-75 
14-5 
i) 
it 
ii 
n 
1000 
(sea service.) 
12-pr. B.L. of 8 cwt. 
3-0 
20-5 
1 lb. 8 ozs. 
Segt. shell. 
11-75 
3-07 
1170 
9-pr. B.L. of 6 cwt. 
3-0 
17-7 
1 lb. 2 ozs. 
n 
9-25 
n 
1057 
7-pr. M.L. mountain, 
3-0 
8-0 
6 OZS. F.G . 
Com. shell. 
7-2 
2-94 
673 
steel, of 150 lbs. 
1 
74. 
Captain W. H. Noble, E.A., 19. 2. ’70, submits for record, the following account 
bf some experiments which were carried out in the Eoyal Arsenal, Woolwich, last 
summer, to illustrate the differences which exist between gun-cotton and nitro¬ 
glycerine as regards their susceptibility to explosion from the effects of detonation. 
These trials further exhibit the enormous force of gun-cotton, when exploded by 
detonation, as compared with that of ordinary gunpowder. 
1. An electric fuze charged with 100 grains of a mixture of sulphide of antimony 
and chlorate of potash, was placed on a quarter pound disc of compressed 
gun-cotton, and fired by the magneto-electric machine. No explosion 
occurred. The gun-cotton merely ignited and burned out with the usual 
yellow flame. 
