THE EOYAL ARTILLERY INSTITUTION. 
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fired, but only one penetrated the plate, being “ set up ” 0*44"; one remained 
in; and one made an indent 3’3" deep and was “set up” D86". 
Mr Deane's.—Eour were fired; one remained in; two made indents 2*9", 
4’8" respectively, and one, striking close to a previous round, 7‘5"; “set 
up” (mean) 1*4". 
The price of the metal supplied by the different firms varied considerably 
—from £60 in the case of Krupp's steel, to £15 in Mr Deane's. Eromthe 
above statement it will be seen that, with the exception of one shot of Messrs 
Krupp's, Messrs Brown's were the only shot which penetrated the plate; but 
when it is remembered that the damage of a service 110-pr. cast-iron shot 
op a plate is only an indent about one inch, whilst the smallest indentin 
this competitive trial was 2T", it will at once be seen the enormous 
importance of obtaining proper material for the manufacture of shot to use 
against iron plated structures. 
Solid steel shot of weights varying from 165 lbs. to 340 lbs. have been 
fired on several occasions at Shoeburyness; the general results obtained will 
be found in Table C., but I will here state the effect of such shot in a few 
instances. 
Spherical Shot. 
In the experiment on the “ Lord Warden” target, a spherical steel solid 
shot weighing 168J lbs. was fired with a 50 lbs. charge, the shot having a 
terminal velocity of 1593'. It remained in the backing at a depth of 12" 
from the face of the target. 
The report on the experiment alluding to this shot states,—- 
“The 10’5" rifled gun with a spherical steel shot weighing 168 lbs., and fired 
with a 50 lbs. charge, did less work on the target than the 9"22" rifled gun fired 
with an elongated steel shot of 221 lbs., and a charge of 44 lbs. ” 
The heaviest spherical steel shot which has yet been fired was in March of 
this year, when a shot weighing 344 lbs., was fired with a 90 lbs. charge 
from the 13*3" Armstrong M. L. rifled gun at a plate 11 inches thick, at a 
range of 200 yds. The plate was indented to a depth of 4*9" and broken in 
half; the shot was a good deal “ set up ” and cracked, and rebounded 14 ft. 
from the plate, it struck with a velocity of 1589' per second, and the worh 
conveyed by it amounted to 13,501,132 foot lbs., being by far the greatest 
force which had ever been delivered against an iron plate at one blow. 
Cylindrical shot. 
A steel cylindrical shot weighing 301 lbs. was fired with a 45 lbs. charge 
at a 7plate backed by 7" of timber and 2J" of iron skin; it struck with 
a velocity of 1293' at 200 yds. range, and indented the plate to a depth of 
6*2", the hole being 12’9" in diameter; the shot, which was originally 14" 
long, was set up 2". Eigs. 7 and 8 show this shot before and after it was fired. 
Fig. 7. Fig. 8. 
