Dale's
workshop and getting a few practical points on the making of a
wireless telephone set.
They found the doctor at a bench that he had rigged up in his barn.
On the wall was arranged a large variety of tools and on the bench
were strewn several coils of wire and a number of objects the name
and use of which the boys did not know.
The doctor, who was in his shirt sleeves, extended a hearty welcome
to the boys, who ranged themselves about him, and whose numbers were
constantly augmented by newcomers until the barn was well filled.
"What I want to do to-day, boys," he said, "is to show you how easy
and simple it is to put up a wireless telephone receiving set without
having to spend very much money.
"Now the first thing you have to get and put up is the aerial," he
remarked, as he unwound a large coil of copper wire. "You want about
a hundred or a hundred and twenty feet of that. You can extend it
horizontally for about fifty feet, say, for instance, from the side
or back of your house to the barn or the garage, and then have it go
up as high as it can go. The upper end doesn't have to be in the outer
air, for the sound will come along it if it's in the attic. Still it's
better to have it outside if possible. The lower end of the wire has
to be connected with the ground in some way, and you can fix that
by attaching it to a water pipe or any other pipe that runs into the
ground.
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