474 
THE DEVELOPMENT OF ARMOUR 
actual plate assuming tlie shot to weigh 100 lbs. This figure is 
extraordinary, especially considering that "Wheeler, Sterling and 
Carpenter shot were employed. 
Fig . 6*. 
A S p!shefls. Some Sterling A.P. shells termed “ semi-armour piercers” were 
tested during the summer. They are expected to perforated a 
Harveyed plate equal to § their calibre without exploding the bursting 
charge. 
In the meantime further trials had been made of the Krupp process 
plates as described in a paper in Stahl und Eisen, by J. Castner, 
