printing-out papers care
should be taken to place the printing frame in the same position
and angle after each examination.

** Wireless Tip [431]

Place the transmitting instruments of a wireless outfit as close
together as possible.

** How to Make a Wireless Telephone [432]

A noted French scientist, Bourbouze, was able to keep up
communication with the outside during the

[Illustration: Details of Wireless Phone Installation]

siege of Paris by making practical application of the earth
currents. The distance covered is said to have been about 30
miles. Another scientist was able to telephone through the earth
without the aid of wires. Nothing, however, has been made public
as to how this was accomplished.

It is my object to unveil the mystery and to render this field
accessible to others, at least to a certain degree, for I have by
no means completed my researches in this particular work.

In order to establish a wireless communication between two points
we need first of all a hole or well in the ground at each point.
In my experiments I was unable to get a deep well, but the
instruments worked fine for a distance of 200 ft., using wells
about 25 ft. deep. As in ordinary telephone lines, we require a
transmitter and receiver at each point. These must be of the
long-distance type. If a hole is dug or a well is found suitable
for the purpose, a copper wire is hung in the opening, allowing
the end to touch the bottom. To make the proper contact an oval or
round--but not pointed--copper plate is attached to the end of the
wire. If a well is used, it is necessary to have a waterproof
cable for the part running through the water. The top end is
attached to the telephone transmitter and receiver, as in the
ordinary telephone, to the batteries and to a zinc plate, which is
to be buried in the earth a few feet away from the well or hole,
and not more than 1 ft. under the surface. A battery of four dry
cells is used at each station.

Both stations are connected in the same way, as shown in the
sketch. This makes it possible for neighbors to use their wells as
a means of communication with each other.
--Contributed by A. E. Joerin.

** Eyelets for Belts [432]

If eyelets, such as used in shoes, are put into the lace holes of
a belt, the belt will last much longer. The eyelets, which may be
taken from old shoes, will prevent the lace from tearing out. I
have used this method on several kinds of bel