62 
ARMOUR AND ITS ATTACK BY ORDNANCE, 
city of 2159 feet (658 metres) directed near tlie four corners and 
centre of the plate. Two projectiles perforated completely. One got 
its point through and rebounded. One lodged with its liead through 
and one broke up. The calculated perforation is 13*4 inches of iron or 
10 - 7 inches of steel. The energy of each shot was 3206 foot-tons or 
Fig. 10. 
Rack View . 
