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1961 Bell Telephone System Print Advertisement.
It was “invented” in 1877, two years after the telephone itself. Alexander Graham Bell and Thomas A. Watson, his assistant, were making intercity tests which required
shouting into the primitive instrument. This annoyed their Boston landlady.
Then Watson had an idea. One night he pulled some blankets off the beds, rolled them into a loose tunnel, and crawled in with his telephone. It was dark, it was hot,
but it worked. While Watson bellowed, the landlady slept serenely!
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