American youths to-day are given, if of a mechanical turn of mind,
to amateur telegraphy or telephony, but seldom, if ever, have to
make any part of the system constructed. In Edison's boyish days it
was quite different, and telegraphic supplies were hard to obtain.
But he and his "chum" had a line between their homes, built of
common stove-pipe wire. The insulators were bottles set on nails
driven into trees and short poles.
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