THE EOYAL AETILLEEY INSTITUTION, 
161 
Table I. 
GIVING THE MEAN PENETRATIONS OF DIFFERENT NATURES OF PROJECTILES AT 1060 YARDS, 
CLASSED WITH REFERENCE TO THE SOIL. 
1 
Projectile. 
o 
o 
i 
Charge 
Nature. 
Mean 
weight. 
Mean 
dia¬ 
meter. 
110-pr 
lbs. oz. 
12 0 
Solid 
lbs. 
111-0 
in. 
7-04 
A*. 
99 
shot. 
99 
33 
)i 
33 
99 
99 
99 
99 
» 
99 
99 
99 
99 
99 
99 
99 
99 
)> 
» 
99 
99 
99 
99 
Blind 
1047 
)) 
99 
99 
shell. 
99 
33 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
>t 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
70-pr 
9 0 
Solid 
70-1 
6-44 
A. 
99 
shot. 
99 
99 
99 
99 
}) 
99 
99 
99 
99 
>} 
99 
99 
99 
99 
» 
99 
99 
99 
99 
» 
99 
99 
99 
99 
99 
99 
99 
99 
,, 
99 
40-pr 
5 0 
Solid 
41-2 
4-80 
A. 
99 
shot. 
99 
99 
)) 
99 
99„ 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
,, 
,, 
99 
99 
Blind 
40-4 
4-80 
99 
99 
shell. 
99 
99 
99 
99 
a 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
,, 
99 
,, 
20-pr 
2 8 
Solid 
20-4 
3-80 
A. 
33 
shot. 
99 
99 
99 
99 
» 
99 
99 
99 
99 
)> 
99 
99 
99 
99 
» 
99 
99 
99 
99 
» 
99 
99 
99 
99 
99 
99 
99 
99 
99 
Blind 
21-2 
3-80 
99 
99 
shell. 
99 
99 
99 
99 
» 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
99 
Soil. 
Clay, artificial... 
3J ... 
99 . 
Natural concretef in natural butt 
» » » 
99 m 99 99 
Clay, artificial... . 
99 .. 
99 . # .. 
Natural concretef in natural butt 
99 99 99 
Eed sandy loam in natural butt ... 
99 ' 99 99 
Clay, artificial. 
« . 
n . 
» *.. 
Natural concrete in natural butt... 
99 9} 99 
3) 99 99 
Clay, artificial.. 
99 ..... 
99 ... 
99 .. 
Hard gravel^ in natural butt . 
99 99 99 
99 99 99 
99 # # 99 99 
Clay, artificial... 
99 .. 
99 .. 
99 . 
99 . 
Hard gravel in natural butt. 
99 99 99 
99 99 99 
99 99 99 
Clay, artificial.. 
» . 
Hard gravel in natural butt. 
99 99 99 
99 99 99 
99 . 4 99 99 
Clay, artificial. 
99 .. 
99 ••• .. . 
Gravelly clay in natural butt . 
Pene¬ 
Mean 
tration. 
pene¬ 
tration. 
ft. 
in. 
ft. in. 
21 
2' 
) 
20 
9 ] 
21 3 
21 
u! 
! 
9 
O' 
) 
9 
9 2 
9 
o' 
) 
18 
8' 
) 
18 
i! 
18 3 
17 
ii' 
) 
7 
8 
3 1 
3 ' 
\ 
7 9 
12 
13 
10' 
0 ' 
\ 
12 11 
17 
0" 
i 
13 
2 
12 
5 
[ 
14 3 
14 
3 
1 
14 
8^ 
1 
8 
6' 
I 
4 
°! 
[ 
6 4 
6 
ej 
f 
13 
9^ 
i 
15 
5 
13 
6 
!> 
14 9 
15 
6 
i 
16 
4_j 
1 
7 
8 > 
8 
4 ( 
7 8 
7 
3 \ 
7 
6J 
) 
11 
2~] 
i 
9 
0 i 
i 
11 
[ 
11 8 
13 
10 1 
12 
11J 
4 
6> 
6 
5 
o< 
i 
6 1 
8 
5J 
i 
10 
O') 
) 
11 
9 
10 10 
10 
9 j 
i 
4 
S'] 
i 
4 
5 
2 
0( 
i 
4 7 
4 
8J 
i 
8 
7'] 
8 
9 
11 
3 
>■ 
10 3 
8 
10 | 
13 
3J 
6 
i 
7 
° 
7 0 
8 
oj 
i 
* Armstrong. 
t Composed of bard cbalk flints, firmly bound together with stiff gravelly clay, 
j Very nearly, but not quite, as hard as the natural concrete. 
