It is then ready to be mounted on a wooden base as shown in Fig. 2.  The secondary terminals are connected to the binding-posts, AA, which may be fastened on the base if desired.  One wire from the primary is connected with the binding-post, B, and the other is connected with the armature, D, which may be taken from an old electric bell.  The contact screw, E, also from an electric bell, is connected to the binding-post, C. The contact 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.

** Mahogany Wood Putty [139]