Abstract
THE discovery by Heinrich Hertz between 1887 and 1889 of experimental means for the production of electric waves, and Branley's discovery that the conductivity of metallic particles is affected by electric waves, form the foundation on which, in 1896, Signor Marconi built up his system of wireless telegraphy.
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The Arc and the Spark in Radio-Telegraphy 1 . Nature 76, 426–430 (1907). https://doi.org/10.1038/076426a0
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DOI: https://doi.org/10.1038/076426a0