[Illustration: SOUNDER-A. brass: B. wood: C. soft iron; DD. coils
wound with No. 26 wire: E. nail soldered on A; FF. binding posts:
H spring]
The stop, K, is a wire nail driven deep enough in the base to
leave about 1/8 in. between the armature and the magnet. The
binding posts, F, may be taken from old dry batteries and are
connected to the two wires from the magnet by wires run in grooves
cut in the base.
The base of the key, Fig. 2, is also made of wood and has two
wooden bearings, E, which are made to receive a pivot, similar to
the one used in the sounder. The lever of the key is made of brass
and has a hardwood knob, A, fastened near the end. A switch, D,
connects with the pivot at F and can be either made from sheet
brass, or taken from a small one-point switch. The binding posts
are like those of the sounder, and are connected to the contacts,
K, by wires run in grooves cut in the wood.
[Illustration: KEY-A. wood; B. brass or iron soldered to nail; C.
brass; D. brass: E. wood: F. connection of D to nail; HH. binding
posts]
** How to Make a Music Cabinet [77]
A neat music cabinet can be made as shown in the accompanying
sketch.
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