ARTILLERY. 
The following Table shews the calibres of English guns of all sorts. 
Pounders 
42 
32 
24 
18 
12 
9 
6 
4 
3 
1 
Calibre in inches 
7,018 
6,410 
5,824 
5,292 
4,623 
4,328 
3,608 
3,204 
2,913 
2,019 
Table of the length, weight, and calibres of brass guns, and of the diameter of their shot, 
and weight of powder for proof and service. 
Brass guns. 
Poun- 
ders. 
Weight of 
powder 
for proof. 
Length. 
Weight of 
metal . 
Calibre. 
Diameter 
of the 
shot. 
Weight of 
powder 
for service. 
f 
Heavy ^ 
f 
Medium j 
42 
lb. oz. 
ft. in. 
ct. qr. lb . 
in. 
in. 
lb. oz. 
31 : 8 
9 : 6 
61:0: 0 
7,018 
6,68 
14 : 0 
24 
21 : 12 
9 : 6 
53:0: 9 
5,824 
5,54 
8 : 0 
12 
12 : 0 
9 : 0 
29:0: 0 
4,623 
4,40 
4 : 0 
9 
9 : 0 
9 : 0 
26:0: 0 
4,200 
4,00 
3 : 0 
6 
6 : 0 
8 : 0 
19:0: 0 
3,668 
3,48 
2 : 0 
3 
3: 0 
7 : 0 
11:2: 0 
2,913 
2,77 
1 -. 0 
1 : 8 
6 : 0 
5:2: 0 
2,310 
2,20 
0 : 8 
24 
18 : 0 
8 : 0 
40:1:21 
5,824 
5,45 
8 : 0 
12 
9 : 0 
6 : 6 
21:0:14 
4,623 
4,40 
4 : 0 
6 
6 : 0 
5 : 0 
10:1:12 
3,668 
3,48 
2 : 0 
24 
10 : 0 
5 : 6 
16:1:12 
5,824 
5,54 
8 : 0 
12 
6: 0 
5 : 0 
8:3:18 
4,623 
4,40 
4 : 0 
6 
3 : 0 
4 : 6 
4:3:14 
3,668 
3,84 
2 : 0 
s- 3 
1 : 8 
3:6 
2:3: 4 
2,913 
2,77 
1 : 0 
N. B. The above charges for service are established by the Board of Ordnance ; but in 
actual service, they are commonly reduced to a third of the. weight of the shot. 
From the following dimensions of the 
wheels and axles of an heavy twelve pounder 
and of a light six pounder, some idea may 
be. formed of the proportion of other parts 
of their carriages, and also of those of pieces 
of artillery of the other rates. 
Heavy 
12 pounder. 
Light 
6 pounder. 
Diameter of the wheel 
ft. in. 
4 : 9,500 
ft- in. 
4 : 5, 
Height of the, axletree 
0 : 8,250 
0 : 6, 
Thickness of ditto 
0 : 6,625 
0 : 5,250 
Length of ditto... 
6 : 8, 
5 : 3, 
The bed of the 12 pounder is 3 feet 3 
inches in length. 
The most usual mode by which cannon 
are discharged is by applying a kindled 
match to the touch-hole. Locks, on a si- 
milar principle to musket locks, have been 
tried in sea service, and have been found to 
perform very well, but their use is by no 
means general. 
A very great improvement has been made 
in matches by M. Leroy, who lias found 
that small rods of lime-tree, and some other 
Soft woods, prepared with infusion of nitrat« 
