154 
MINUTES OF PROCEEDINGS OF 
Frame Targets . 
9. The frame targets are made of well dried wood, and of just sufficient 
size to afford a good mark in firing, Pig. 1. The sides of the targets are 
furnished with a range of pins, covered with gutta percha, and the wires 
are stretched by these pins across the target, two or three turns being taken 
round each pin. The distance between the wires is made equal to about 
half the diameter of the projectile used. When it is necessary to mend the 
wire, after a shot has passed through the target, it is done by simply twisting 
the two broken pieces together, Eig. 2. The copper wire employed in 
making Artillery experiments should not be more 
than 0'012 in. in diameter. The targets are gene¬ 
rally made about 30 by 60 ins., a cross piece 
being placed about 20 ins. from the bottom, and 
so reducing the space through which the shot 
passes to 30 by 40 ins. When the first target 
is near the muzzle of the gun it is necessary to 
protect it from the blast of the discharge; for 
this purpose a screen (Eig. 3, p. 155), formed of 
strong plank, is interposed between the gun and 
the first target. A hole, about 1| calibres in diameter, is cut in the centre 
of this screen, to admit of the shot passing it. 
