Signalling through space without wires : being a description of the work of Hertz & his successors (1900)
Lodge, Oliver, Sir, 1851-1940, Hertz, Heinrich, 1857-1894 · London : "The Electrician" Printing and Publishing Company, Limited · leaf 106
end of which is close to thecircuit containing the metallic powder ; its other end, severalmetres distant from the circuit, is fairly close to a chargedLeyden jar. A spark takes place and the conductor is charged.At the same instant, the conductivity of the metallic powderis greatly increased. The… … The source of electricity is a two-plate Holtz machinedriven at from 100 to 400 revolutions. A sensitive substanceis introduced into one of the arms of a Wheatstone bridge, orinto the circuit of a single Daniell cell at a distance of some10 metres (34ft.) from the Holtz machine. Between…
Electric waves · Telegraph, Wireless · Electricity · Wireless Technology
Internet Archive · Medical Heritage Library · Public Domain Mark 1.0. Free to use for anything.
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