, 20 and 22-volt lamps will show quite brilliantly, but the
110-volt globes will not glow. When experimenting with these
globes everything should be dry. A cold, dry atmosphere will give
best results.
* * * * * * *
[Illustration: Annual Regatta, Port Melbourne, Australia]
** How to Make a Simple Wireless Telegraph [121]
By ARTHUR E. JOERIN
An efficient wireless-telegraph receiving apparatus for distances
up to 1,000 ft. may be constructed in the following manner: Attach
a watchcase telephone receiver to a dry cell, or battery, of any
make. The negative pole, or zinc, of the cell is connected to a
ground wire. This is done by attaching to a gas or water pipe. The
positive pole, or carbon, of the cell is connected to the aerial
line. This aerial collector can be made in various ways, either by
using a screen wire or numerous wires
[Illustration: For Distances up to 1000 Feet]
made in an open coil and hung in the air. File a V-shaped groove
in the upper end of the carbon of the cell. Attach a small bent
copper wire in the binding post that is attached to the zinc of
the cell.
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