400 
MINUTES OF PROCEEDINGS OF 
Besides the foregoing rounds, 24 preliminary rounds were fired from the 
Trench gun, on the 28th June 1864, the results of which are contained in 
the following abstract:— 
Date. 
No. of 
rounds 
fired. 
Eleva¬ 
tion. 
Charge. 
Mean 
range. 
Mean 
difference 
of range. 
Mean 
observed 
deflection. 
Mean 
reduced 
deflection. 
Remarks. 
1864. 
O 
lbs. 
yds. 
yds. 
yds. 
yds. 
June 28 
3 
1 
20 
928 
24-0 
2*2 
1-6 
Solid shot, first supply, 
n 
3 
2 
20 
1337 
48-3 
3*3 
2-0 
110 lbs. 
a 
3 
5 
20 
2590 
7-0 
14*7 
2-2 
a 
3 
10 
20 
4420 
70-3 
31-0 
5*3 
n 
3 
1 
25 
952 
9-0 
2-1 
0-6 
n 
3 
2 
25 
1466 
25*7 
5*3 
0-6 
n 
3 
6 
25 
2742 
31*7 
17-0 
0-7 
a 
3 
10 
25 
4701 
53-7 
34-3 
8-4 
Appendix 1 C. 
Abstract of results of shot practice with 7-in. muzzle-loading gun, rifled 
on Mr Lancaster's system. 
Date. 
No. of 
rounds 
fired. 
Isieva- 
tion. 
Charge. 
Mean 
range. 
Mean 
difference 
of range. 
Mean 
observed 
deflection. 
Mean 
reduced 
deflection. 
Remarks. 
1864. 
O 
lbs. 
yds. 
yds. 
yds. 
yds. 
Solid shot; 1st 
; supply ; 110 lbs. 
July 
14 
10 
2 
25 
1590 
28*8 
4*1 
2*0 
a 
27 
5 
2 
a 
1545 
36*0 
3*2 
0*7 
a 
13 
10 
5 
a 
2817 
18-9 
25*2 
3*6 
n 
27 
6 
5 
n 
2903 
32-0 
21*0 
2*7 
n 
12 
5 
10 
n 
4487 
16-5 
74*0 
4*5 
n 
14 
5 
10 
a 
4605 
25-6 
80*9 
6*6 
n 
26 
5 
10 
n 
4757 
127*2 
110*1 
20*5 
a 
15 
10 
2 
20 
1455 
27*3 
4*5 
2*0 
n 
27 
5 
2 
it 
1380 
34*0 
3*1 
1*8 
a 
26 
10 
5 
a 
2688 
22*6 
30*5 
4*8 
a 
27 
6 
5 
n 
2611 
43*0 
15*0 
2*1 
Oct. 
10 
10 
5 
a 
2520 
65*7 
33*2 
3*9 
Travelled 200 miles, 
July 
15 
10 
10 
n 
4299 
75*1 
61*0 
12*9 
and rusty. 
a 
26 
5 
10 
a 
4353 
64*0 
101*5 
9*2 
a 
27 
5 
2 
12 
1198 
25*4 
5*5 
0*8 
n 
27 
5 
5 
n 
2287 
57*2 
14*9 
1*2 
n 
27 
5 
10 
a 
3907 
24*8 
78*5 
4*0 
Hollow shot: 2nd supply: 100 lbs. 
( 
Copper centering 
Oct. 
20 
10 
2 
20 
1433 
33*7 
5*8 
4*2 j 
studs, slightly filed 
down ; very rusty. 
n 
20 
10 
5 
n 
2724 
59*2 
25*4 
5*4 
Sept. 
29 
20 
5 
n 
2667 
32*2 
27*9 
5*1 
Oct. 
10 
10 
5 
n 
2686 
23*4 
39*2 
6*5 
inclusive, that a stud appeared to detach itself from the French shot during flight. The results 
must therefore be neglected in comparisons of accuracy. 
