THE DEVELOPMENT OF AEMOTTE 
521 
of the test being pushed thus far in exhibiting the manner in which 
the plate yields. Then, tbe behaviour of the capped shot is of the 
highest interest. The cap apparently enabled the shot so far to retain 
its point as to perform its boring action through the plate, and by this 
means to get through plate and skin, although breaking up, thus 
defeating the plate with a velocity of only 1,984 foot-seconds, and a 
figure of merit or factor of only 2*31. Something of this kind most 
likely happened, although the action must have been imperfect. It is 
desirable to know if the plate had been broken radially from the 
centre or point of impact of the shot’s point, or driven out in a disc. 
Fig. 25 shows the piece of plate broken away. The report speaks of 
what is termed a “spur” at the point of exit about 1*6 in. high. The 
trial must go to establish the excellence of Krupp plates, and, further, 
the value of the cap on the shot point. 
It is to be noted that while this Krupp plate exhibited the usual 
characteristic toughness, it is again seen how mild a tax is imposed on 
thin plates in the way of fracture. The energy per ton of round No. 3 
is only 506 foot-tons supposing the plate to weigh about 5*6 tons. 
Nevertheless the setting up of the shot produced a wedgeof considerable 
diameter, which the plate’s own resisting power thus brought upon it, 
but which it bore admirably. 
(To be Continued.J 
