THE SECRET LIFE OF MACHINES - The Telephone
by Tim Hunkin
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The forerunner of the telephone was the telegraph. By 1870 all major towns in Europe and America had telegraphs, sending messages in 'on' and 'off' pulses (e.g. Morse code). It was while trying to improve the telegraph that Bell discovered the telephone.


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The Telephone cartoon

 

Cartoons copyright (C) 1988-1994 Tim Hunkin. All rights reserved.
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