Fig. 25. 
520 
THE DEVELOPMENT OF ARMOUR. 
much toughness was called into action. The factor of this plate is 
enormous, namely, 2*95. This was a little beyond the actual factor of 
the plate’s power of resistance, but that of the previous round, namely, 
2*72, is very great, larger than hitherto met with. Very probably, 
our own excellent Sheffield Krupp plates would give just as good a 
factor^ but they have not ever thus been tested, and we see the value 
