THE ROYAL ARTILLERY INSTITUTION. 
399 
Appendix IB. 
Abstract of results of shot practice with 7-in. muzzle-loading gun, rifled 
on the French system. 
Date. 
No. of 
rounds 
Eleva¬ 
tion. 
a> 
fcuo 
Mean 
Mean 
difference 
Mean 
observed 
Mean 
reduced 
Remarks. 
fired. 
o3 
6 
range. 
of range. 
deflection. 
deflection. 
1864. 
O 
lbs. 
yds. 
yds. 
yds. 
yds. 
Solid shot 
; 1st supply; 110 lbs. 
July 14 
10 
2 
26 
1500 
62-4 
4-6 
2-0 
/, 27 
6 
2 
n 
1420 
81*8 
3-6 
1-6 
// 13 
10 
5 
n 
2713 
36-1 
21-9 
4-7 
/, 27 
6 
5 
n 
2788 
41-8 
18-7 
4-9 
/, 12 
6 
10 
it 
4489 
48-2 
30-2 
10-8 
» 14 
6 
10 
4543 
45-8 
38-5 
22-4 
Hind buttons cut off. 
// 26 
5 
10 
n 
4586 
82-6 
52-4 
24-5 
// 15 
10 
2 
20 
1386 
35-4 
2-2 
0-7 
„ 26 
10 
6 
2612 
33-3 
21-2 
2-0 
Zinc buttons; tra¬ 
Oct. 10 
10 
6 
2405 
57*1 
21-8 
5-2 
July 15 
10 
10 
a 
4210 
46*2 
41-6 
14-6 
velled 200 miles, and 
„ 27 
4 
2 
12 
1152 
19-7 
3-7 
0-8 
rusty. 
,/ 27 
4 
6 
II 
2219 
54-5 
6-1 
2-8 
„ 27 
4 
10 
a 
3908 
136*5 
33-8 
8-3 
Hollow shot; 2nd supply; 100 lbs 
Oct. 20 
// 10 
/; 20 
10 
10 
10 
2 
5 
5 
20 
n 
a 
1348 
2456 
2606 
127-3* 
47-6 
36-7 
8-2 
27-5 
14-6 
7-5 ) 
7-2 [■ 
5-4 ) 
Zinc on bearing side 
of button. Zinc of 
top button filed 
down to 1-94". 
Sept. 29 
Oct. 6 
10 
10 
6 
6 
n 
n 
2519 
2538 
40-4 
23-1 
25-5 
17-8 
3-6 1 
2-9 j 
Zinc buttons. 
„ 6 
6 
5 
12 
2092 
62-6 
8-7 
5-6 
Buttons filed down ‘5". 
Solid shot; 3rd supply: Palliser’s buttons; 100 lbs. 
Sept. 27 
10 
2 
25 
1446 
19-9 
3-2 
2-0 
Painted. 
„ 27 
10 
2 
20 
1384 
29-1 
3-8 
0-8 
II | 
// 27 
11 
2 
12 
1143 
11-5 
3-6 
0-5 
rr 
Oct. 6 
10 
6 
25 
2716 
35-9 
22-7 
2-6 
Rusted. 
Sept. 29 
10 
5 
20 
2640 
27-4 
30-6 
3-3 
Oct. 6 
6 
6 
12 
2285 
46-2 
16-6 
1-5 
Exposed. 
Sept. 28 
6 
10 
25 
4573 
23-0 
122-9 
6-3 
Painted. 
h 28 
6 
10 
II 
4559 
28-2 
118-9 
11-9 
Exposed. 
/; 28 
6 
10 
20 
4379 
19-6 
98-5 
4-0 
Painted. 
/, 28 
6 
10 
n 
4322 
43-8 
102-9 
7-4 
Exposed. 
„ 28 
6 
10 
12 
3951 
12-4 
68-5 
19-2 
Painted. 
// 28 
5 
10 
n 
3868 
31-2 
101-7 
7-6 
Exposed. 
Round shot of 43*4 lbs.; riveted to wood bottoms. 
Oct. 11 
10 
2 
20 
1375 
63-7 
8-4 
4-4 
« 11 
10 
2 
12 
1247 
54-5 
8-4 
5-3 
« 11 
5 
5 
20 
2238 
42-0 
26-2 
11-8 
a 11 
10 
5 
12 
2116 
90-2 
18-5 
7-8 
Loose round shot. 
Oct. 12 
10 
5 
12 | 
| 2034 | 64-3 
13-9 
7-2 
Recovered loose round shot. 
Oct. 13 
10 
2 
20 
1410 
62-1 
8-9 
6-4 
« 13 
6 
5 
n 
2264 
30-8 
10-3 
8-0 
// 13 
10 
2 
12 
1176 
50-0 
6-1 
3-9 
* The first 10 rounds on this day were experimental, with all the guns, to try the effect of 
omitting the felt and grummet wad (par. 7), it was noticed at each round from the 3rd to the 6th 
