Francois van Rysselberghe (1846-1893). 1867 illustration of the Belgian engineer and meteorologist Francois van Rysselberghe. Van Rysselberghe propose

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Francois van Rysselberghe (1846-1893). 1867 illustration of the Belgian engineer and meteorologist Francois van Rysselberghe. Van Rysselberghe proposed the principle of transmitting telephone and telegraph signals along the same wires, making long-distance telephone calls possible. He also worked on meteorology, becoming director of the Belgian Meteorological Office.

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Photo credit: © COLLECTION ABECASIS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
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