The History of the Telephone

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Kessinger Publishing, Jun 1, 2004 - Technology & Engineering - 124 pages
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Snap that reed again, Watson, cried the apparently irrational young professor. There was one of the odd-looking machines in each room, so it appears, and the two were connected by an electric wire. Watson had snapped the reed on one of the machines and the professor had heard from the other machine exactly the same sound.

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