ct spring, F, should
be bent against and soldered to the armature in order to make the
vibrations more rapid.

If a false bottom is used on the base, all the wiring may be
concealed, which adds greatly to the appearance and if desired a
small switch may be added. The handles, which may be old bicycle
pumps or electric light carbons, are connected to the
binding-posts, AA, by means of wires about 3 or 4 ft. long. This
coil when operating with the tube pulled all the way out and
connected to a single dry cell will give a current stronger than
most persons can stand.

** Home-Made Toaster [139]

Each outside frame of the toaster is made from one piece of wire
30 in. long. These are bent in a perfect square making each side
7-in. long. This will allow 1 in. on each end for tying by
twisting the ends together. The first two wires inside and on each
side of each frame are 8 in. long. Eight wires will be required
for this purpose and as they are 8 in. long 1/2 in. is allowed on
each end for a bend around the outside frame, as shown in the
sketch. The two middle wires are extensions of the handles. Each
of these wires are made from a piece about 26 in. long and bent in
the shape of a U. The ends of the wire are bent around the frame
in the same manner

[Illustration: Toaster]

as the other wires. This will leave the handle laying across the
other side of the frame. The frame is fastened to the handle on
this side by giving the handle one turn around the frame. The
inside edges of the frame are now tied together with a small ring
of wire which is loose enough to allow each half to swing freely.
--C. D. M.

** Home-Made Shocking Machine [139]

An ordinary electric bell may be connected up in such a way as to
produce the same results as an expensive

[Illustration: Inexpensive and Effectual]

shocking machine. The connections are made from the batteries to
the bell in the usual manner. Two other wires are then connected,
one to the binding-post of the bell that is not insulated from the
frame and the other to the adjusting screw on the make and break
contact of the bell as shown in the sketch. The other ends of the
wires are connected each to a common table knife. This will give
quite a good shock and a much larger one can be had by placing one
knife in a basin of water and while holding the other knife in one
hand, dipping the fingers of the other hand in the water.
--Contributed by D. Foster Hall.

*