THE ROYAL ARTILLERY INSTITUTION. 
147 
THE FOLLOWING EXPERIMENT WAS CARRIED ON AT SHOEBURYNESS, ON 
17th JUNE, 1864, TO TEST THE POWERS OF RESISTANCE TO PROJECTILES 
OF THE “ LORD WARDEN.” 
[CONTRIBUTED BY CAPTAIN E. J. BRUCE, R.A.] 
The target 20' by 9', represents the ordinary construction of a wooden 
ship armour-plated, with the addition of a thick iron skin worked outside of 
the frame timbers of the ship. 
The following are the scantlings: frame timbers moulded, 12i";*iron 
diagonal riders connecting the frame timbers, 6" by 1J"; inner planking, 
8" thick ; iron skin, thick; outside planking, 8J" thick; rolled armour 
plates, 20' x 4' 6" x 4*5", manufactured by the Millwall Company. 
Armour plate bolts, 2^" diameter. Iron washers were placed under the 
bolt-heads and rested on india-rubber washers, the latter being let into the 
timber. 
n n 
Deck beams, lower... 16 by 12 
„ upper . 16 „ 16 
Waterway, lower . 15 „ 15 
„ upper .... 13 „ 14 
Deck planking, lower . 4 
„ upper . 4 
Iron knees to each beam—weight, 3 cwt. 2 qrs. 21 lbs. 
The total weight of the target is 38 tons, 16 cwt. 13 lbs. 
Range, 200 yds. 
The guns used in tbis experiment were as follows 
Weight. 
tons cwt. qrs. lbs. 
One 68-pr. smooth-bore muzzle-loading gun . 0 95 0 0 
One 9*22" muzzle-loading rifled gun, 11' long, 6 grooves. 6 11 2 11 
One 9*22" muzzle-loading rifled, gun, 13'3" long, 6 grooves... 12 2 2 0 
One 10*5" muzzle-loading rifled gun, 11' 7" long, 10 grooves . 11 15 2 O 
One 7" muzzle-loading rifled gun, 10' 9" long, 6 grooves. 6 13 3 0 
The following shot and shell struck the target- 
From 10-5" Armstrong rifled gun...... 
„ 9*22" rifled 12 ton gun. 
„ 9*22" rifled 6| ton gun... 
„ 7*0" muzzle-loading rifled gun.. 
„ 68-pr. smooth-bore gun .. 
Spherical steel shot; one; weight, 168*25 lbs. 
Cylindrical steel shot; one; weight, 301 lbs. 
Cylindrical steel shot; four; total weight, 885*5 lbs. 
Spherical steel shot; one; weight, 144*25 lbs. 
Spherical cast-iron shot; two; weight, 208*75 lbs. 
Cylindrical steel shell; two; weight, 349*5lbs. 
Cylindrical steel shot; one; weight, 100 lbs. 
Solid steel shot; one; weight, 71*5 lbs. 
* Occasional, spaced several feet apart, and inclined at about an angle of 45°. 
