Information on Telegraphs
Before the invention and widespread use of telephones, telegraphs were the main mode of person-to-person communication.Telegraphs are an antiquated device for the transmission of messages over long distances. The first telegraph prototypes were invented...
A "telegraph" is a device for transmitting and receiving messages over long
distances, i.e., for telegraphy. The word "telegraph" alone now generally refers to
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In 1828, the first telegraph
in the USA. In 1830, an American, Joseph Henry (1797-1878), demonstrated the potential of William Sturgeon's electromagnet for long distance communication by sending an electronic current over one mile of wire to activate an electromagnet w... More »
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