54 
ARMOUR AND ITS ATTACK BY ORDNANCE. 
Fig. 3. 
through cracks, but its face broke away nearly all over (see Fig. 3). 
The general impression was that the Schneider nickel plate behaved best. 
On this occasion it may be seen that the Schneider plates scored a 
complete victory over their English compound rival. 
Ochta On November 11th, 1890, a competitive trial took place at Ochta, 
m i 890 . Uon near St. Petersburg, which closely resembled the American trial in its 
couditions. One compound plate was submitted by Messrs. Brown, on 
Ellis system ; one “ all steel ” plate was sent by Schneider, which was 
found by subsequent analysis to contain 3 per cent, of nickel; and one 
plain all “ steel plate 33 was sent by Messrs. Tickers. Each plate was 
8 feet x 8 feet x 10 inches, weighing about 11 *7 tons. Five forged 
steel projectiles were fired at each, two near the top corners, with about 
1984 feet velocity, and a calculated perforation of 11*93 inches of iron 
and 9*54 inches of steel, a striking energy of 2414 foot-tons, or 206 
foot-tons energy per ton of plate ; and three near the bottom corners 
and centre, as shown in Figs. 4, 5 and 6, with about 2080 feet velocity, 
and 12*50 inches perforation through iron, or 10*00 inches through 
steel, a striking energy of 2682 foot-tons, or 229 foot-tons energy per ton 
of plate. This test was then a little less severe than that of Annapolis, 
but closely resembling it. The Figs. 4, 5, and 6, 1 show the faces of 
1 The author attended this trial and made the sketches as carefully as circumstances would 
allow .—See “Engineer,” November 21st, 1890. 
