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A train dispatcher using a Morse key to send a message down the line on the railway telegraph system
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A train dispatcher using a Morse key to send a mes...

Photograph of Guglielmo Marconi's wireless telegraph station in Cornwall, which sent and received signals between England and America
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Photograph of Guglielmo Marconi's wireless telegra...

Marconi'S wireless telegraph being used to report international yacht races
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Marconi'S wireless telegraph being used to report ...

Guglielmo Marconi's wireless telegraph station in Dresden, which received signals from Oberschöneweide and transmitted them to Karskrona in Sweden and Poldhu in Cornwall
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Guglielmo Marconi's wireless telegraph station in ...

Illustration explaining the operation of wireless telegraphy at sea
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Illustration explaining the operation of wireless ...

Austrian field telegraph station
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Austrian field telegraph station

Photograph of U.S. Military Telegraph Construction Corps
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Photograph of U.S. Military Telegraph Construction...

Train in station on Illinois Central Railroad
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Train in station on Illinois Central Railroad

Caselli's pantelegraph
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Caselli's pantelegraph

Caselli's pantelegraph
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Caselli's pantelegraph

Main station of Exchange Telegraph Company, London
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Main station of Exchange Telegraph Company, London

Artist's reconstruction of the scene when Tsar Ncholas I
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Artist's reconstruction of the scene when Tsar Nch...

Workmen building a telegraph station
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Workmen building a telegraph station

One of General Grant's Unionist
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One of General Grant's Unionist