ARMOUR AND ITS ATTACK BY ORDNANCE. 
67 
iron or 11*7 inches 1 2 of steel. The plate was of the usual dimensions, 
8 feet x 6 feet x 10| inches. The attack was, therefore, of such 
severity that nothing but greatly increased powers could enable the 
plate to bear it. How well it behaved may be seen in Fig. 13, p. 65. 
The points of the two projectiles striking on the apparent right pene¬ 
trated to a distance of about 13 inches from the plate face, making star 
openings at the back and both rebounding entire. The other three 
projectiles broke up. It may be seen that a through crack connects 
shot hole “ 3 ” with the top and side, a corner of the plate being 
detached. 
The second plate was tested at Bethlehem on July 30th. 1 The test 
appears to have been in all respects the same as that above-mentioned, 
except that apparently from the photograph the plate was wholly un¬ 
supported round its edge. The result is shown in Fig. 14, p. 66, which 
is a print of the photograph. Close observation will reveal a fine 
crack running from shot 3 to the top edge of the plate. 3 The whole of 
the five Holtzer forged steel 8-inch projectiles broke up, leaving their 
heads as shown. It is said that fine star cracks were in some cases 
beginning at the back, but in no case did any point come through. 
This result is then a magnificent success. The 8-inch projectiles were 
broken up by the Harvey face so completely that the white radiating 
splashes of metal are apparent, especially in rounds 2 and 3. That 
the plate held together in spite of the violent wedging strain of the 
five 8-inch shot heads thus driven almost through it, is to be attri¬ 
buted to the nickel. 
1 See “ Engineers ” of August 19th, September 6th, and October 14th, 1892. 
2 The apparent crack across the left corner is only an imperfection in the print, being produced 
by“the photograph card being broken in the post. The pi’ocess of printing is done without hand 
work which renders it free fron suspicion of bias, but is liable to this class of fault. 
(To be Continued). 
