The Story of Wireless Telegraphy |
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according aerial apparatus appears arrangement battery cable capacity carried circuit close coherer coil communication conducted conductor connected consisted copper described direction discharge discovery distance earth effect electric electric waves electro-magnetic establishing exciter experiments fact feet four further give given greater ground Hertz idea important increased induction induction coil influence insulated interesting inventor Italy kilometres known later length less light Lodge magnetic Marconi means ments mercury messages metal method metres miles Morse necessary obtained operation oscillations parallel pass plates poles position possible practical prevent principle Professor receiver refer regard researches resistance sending sensitive sent ship shore shown side signals similar sounds space sparks station successful surface tele telephone terminal tion transmission transmitting tube turned vertical vessels waves wire wireless telegraphy