When the alarm rings in the early morning, the
key turns, the stick
[Illustration: Automatic Time Draft-Opener]
falls away, releasing the weight, which pulls the draft open.
--Contributed by Edward Whitney, 18 Gorham St., Madison, Wis.
** How to Transmit Phonograph Music to a Distance [107]
An interesting experiment, and one calculated to mystify anyone
not in the secret, is to transmit the music or speech from a
phonograph to another part of the house or even a greater
distance. For an outdoor summer party the music can be made to
come from a bush, or tree, or from a bed of flowers. The apparatus
is not difficult to construct.
The cut shows the arrangement. Procure a long-distance telephone
transmitter, D, including the mouthpiece, and fasten it to the
reproducer of the phonograph. Also a watch case
[Illustration: The Long-Distance Phonograph]
receiver, R, which fasten to the horn. These parts may be
purchased from any electrical-supply house. Connect two wires to
the transmitter, running one direct to the receiver, and the other
to the battery, thence to a switch, S, and then to the receiver.
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