Abstract
M. ANTOINE BREGUET, at a lecture upon Recent Advances in Telegraphy, exhibited some ingenious apparatus illustrating the principles of the duplex and quadruplex telegraph, the actions of the electric currents being most successfully represented by the flow of water in tubes.
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Physical Notes . Nature 22, 18–19 (1880). https://doi.org/10.1038/022018b0
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DOI: https://doi.org/10.1038/022018b0
