THE ROYAL ARTILLERY INSTITUTION. 
89 
Projectile. 
®-S *s.g 
eg fl 
Effects. 
5 * 
|.a 
|| 
r 
7 by 
11 
20 by 
9' 
12 by 
12 
lOby 
10 
12 by 
12 
llby 
13 
Remarks. 
Struck 300 yds. short; hit top of 2-in. plate over top 
right-hand bolt; diameter of indent 9-in.; the corner 
of the plate buckled up 1 ^-in. j masonry started and 
cracked a little. 
Hit at junction of 2 -in. and 3-in. plates; depth of in¬ 
dent 8 -in.; area 7 -in. by 11 -in.; started masonry 5 -in. 
and cfacked the granite block on the top; a crack 
from the bolt hole of 3-in. plate. 
Missed the target and hit Thorneycroft’s embrasure 
close to its left edge, on the fifth bar from top; broke 
the bar and drove it 6 -in. into the opening of the 
embrasure. 
Hit 2 ^-in. plate, crack extending from a bolt hole; a 
piece of the plate 20-in. by 9-in. driven into the 
masonry which was much shaken. 
Hit at junction of 2 |-in. and 2 -hj. plates which sepa¬ 
rated 5 -in. 
Hit top of lower 3^-in. plate; crack through left upper 
bolt hole; it struck over No. 11. 
Hit top of stonework. 
Hit at the junction of the two 3|-in. plates; the plates 
separated f-inch, crack extending from bolt hole to 
No. 32 shot hole; the bolts not a bit started. 
Hit corner of the granite and brought down a large 
piece. 
Hit lower edge of 2 -in. plate; shot broke up and re¬ 
mained in the hole 5-in. in masonry. 
L 00 -pr 
shell 104 
12 40 
400 
10'R 
7'R 
Filled 
with 
85 lbs. 
of sand 
do 
do 
do 
do 
do 
do 
May 16, 1861. 
Struck bottom corner of 2-in. plate on the top of the 
bolt, broke away a piece 15 in. by 9 in., and drove it 
broken up with the pieces of the shell 2 ft. into 
masonry; struck over No. 42. 
Struck at the joint of 21-in. plates, broke away an 
irregular hole 14 in. by 11 in., and forced the pieces 
with the shell 1 ft. into masonry; lower bolt very 
much damaged and bolt bent. 
Hit junction of 2-in, plates; shell broke up and driven 
into the masonry about 15 in. deep; broke away 
the left corner of lower 2 |-in. plate near last round; 
broke off 5 in. of the bolt where hit. 
Struck joint of 3-in. plates; hole 9 in. by 12 in.; drove 
pieces with pieces of shell 10 in. into masonry; plate 
not cracked, very slightly bent; the plates slightly 
separated. 
Struck 2|-in. plate near left edge over No. 24, broke 
away a piece 2 ft. by 9 in., and drove it in pieces 
with pieces of shell 1 ft. into masonry; plate much 
bent, no cracks. 
Hit joint of 3|-in. plates over the 68 -pr. No. 38; two 
large cracks extending through bolt holes in a cir¬ 
cular direction right across the plate: another 
circular crack on lower plate through the port hole; 
did not penetrate. 
Hit centre of lower 3^-in. plate, started a bolt 1 in.; 
plate very slightly bent; depth of indent very small 
indeed; plate not damaged at all; a great deal of 
masonry shaken down from top. 
Hit near the same place; plate a very little buckled 
and cracked across; the bolts stood well, the plate 
being forced back on them; the crack passed 
through a bolt hole. 
Hit centre of 3-in. plate; depth 35 -in.; large circular 
crack round indent; diameter of crack 14 in. 
Struck lower 3|-in. plate, broke away the upper half 
of the lower plate, except a small corner near left 
top bolt; right top bolt broken; the piece cracked 
through and much buckled. 
