Electric Telegraph How Does It Work
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Plug pulled on the world's last commercial electric ... – Jul 16, 2013 · The electric telegraph, which has helped to make our world more closely knit since 1844, has passed out of commercial use after the last message was sent ...
-Only one wire required to link the sending end to the receiving end, using the earth to complete the circuit. -Sending end consists of a stylus with a metal tip on ...
The Electric Telegraph Company, Central Station, Founders' Court, Lothbury, London The Public Hall, the Instrument Gallery above, and the Attic Gallery with ...
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