6 
2455 Two-5-inch plates bolted together by 14 screw bolts; front plate 6' 9" x 5', 
and back do, 9' x 5". After an additional round, November 28, 1867. 
2458 Back of do. 
2457 Front of back plate after the bolts were removed. 
2458 Back of front do do 
2459 Bolts removed from the plates after practice. 
2460 Experiment proposed by Major Palliser to test blocks of chilled cast-iron 
versus blocks of common grey cast-iron as a backing for armour plates. 
A block 3' x 2 f x V 8" resting on wooden balks and butted against 
Samuda’s target, after one round from 68-pr. S.B. gun, December 3, 
1867. 
2461 do do A round block, diameter 3' 6" x 1' 10" after one round 
from 68-pr. S.B. gun, and one round from 7-in. M.L. rifled gun, 
December 3, 1867. 
2462 do do A block 3' x 2' X V 6" after one round from 68-pr. S.B. 
gun, December 3, 1867. 
2472 Gun-cotton experiment. 7-inch steel shell burst in gun. 
2473 Front of iron planks, after eight rounds from 68-pr. S.B. gun, 6th Dec. 
1867. 
2474 Back of do. 
2475 Front of No. 15 test plate, about 4' 6" X 4' after one round from 68-pr. 
S.B. gun, and one round from 7-inch M.L. rifled gun. 
2476 Back of do. 
2477 Front of iron planks after nine rounds from 68-pr. S.B. gun, Dec. 20, 1867. 
2478 Back of do 
2479 Front of iron planks after five rounds from 68-pr. S.B. gun, Dec. 20, 1867. 
2486 Back of do. 
2481 Front of iron planks after five rounds from 68-pr. S.B. gun, Dec. 31, 1867. 
2482 Back of do 
2483 Front of iron planks after seven rounds from 68-pr. S.B. gun. 
2484 Back of do 
2485 Front of iron planks after eight rounds from 68-pr. S.B. gun, Dec. 31, 1867. 
2486 Back of do 
2495 Front of iron planks after five rounds from 68-pr. S.B. gun, Jan. 16, 1868. 
2496 Back of do 
2497 Front of iron planks after twelve rounds from 68-pr. S.B. gun, Jan. 21,1868. 
2498 Back of do 
2499 l^-pr. M.L. gun mounted on a 9-pr. steel carriage. 
2506 9“P r * steel carriage, after firing 306 rounds from 12-pr. M.L. gun, and 
108 rounds from 3-inch bronze gun. 
2515 Back of front 5-inch plate placed against 8-inch target, after four rounds, 
March 17, 1868. 
2516 Back of back, do 
2517 Back of both 5-inch plates placed against 8-inch target, after four rounds, 
March 17, 1868. 
2518 Vent pieces of Armstrong breech-loading guns, cut in section to shew the 
effect of repeated discharges in enlarging the channel. 
2519 do do 
2526 General view. Cannon of Muhammad II. Cast a.h. 868 (a.d. 1464). 
2521 View taken from behind do 
2522 View of the muzzle, do 
2523 Enlarged view, do 
2524 Impression taken of 9-inch M.L. rifled compound gun, before the comftieiice- 
ment of the experiment. 
2525 do after 139 rounds, in addition to 20 rounds battering charges in 
smooth-bore state. 
