-- }
| | _ // \\ // \\ } {
| | |_| || C_{0} || A || || || A { }
| | P \\ // \\ // } {
| +------------- --------------- ---------------- }
| F {
|_______________________________________________________}

Plan.
P C
=|= _________
|===| ========= A A
========| | S |========\_______/=================
|spring | | |
| | | | |
|S_ | __| |__ __|
||| | |
___________|||______________| |_____________________
|
| Section.
H /
\+/
|
|
|
|
|
|
_____+_____
| |
| W |
| |
|___________|

Besides these objections to this target, another and more serious one
is the irregularity in the manner of breaking the circuit. It has been
proved that times required for a flat headed and an ogival headed
projectile to rupture the current are very different.

To remedy these defects a new and very ingenious target has been
devised and used with great success at the United States Military
Academy at West Point. The top of the target is a wooden strip, F, on
the upper side of which are screwed strips of copper, A A, about 1/2
in. wide, and 1/8 in. thick. The connection between two adjoining
strips is made by a copper cartridge, C, which is dropped in a hole in
the frame bored to receive it. This cartridge is the one used in the
Springfield rifle. Inside the cartridge is a spiral spring, S, which,
acting on the bottom of the hole and the head of the cartridge, tends
to make the latter spring up, and so break the circuit.

To the hook, H, which is attached to the cartridge, is suspended, by
means of a string, the lead weight, W, thus drawing down the cartridge
and making the circuit between A and A'. All the weights being
suspended the current comes in through the post, P, passes along the
copper strips and out of the corresponding post on the other end.

On firing the projectile cuts a string, and the sprin