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Introductory Amber Friotional Electricity PhenomenaPosi
MagnetismFirst Law of MagnetismMagnetic InductionMag
12 other sections not shown
acid action actuated alternating current ampere antenna armature arrangement battery carbon cell charge coast stations coherer coil of wire condenser conductor connected copper current flows cylinder diaphragm difference of potential direction disc discharge distance earth effect electric current electrical oscillations electrolyte electromagnetic waves electromotive force emitted energy ether waves Fessenden frequency galvanometer Hertz increase induction coil insulated knob latter Leyden jars lines Lodge-Muirhead system loop Marconi means mercury metal Morse code needle number of turns obtained oscilla Paternoster Square pith ball placed plates platinum pole position practical primary circuit primary coil radiation receiving circuit receiving station relay resistance resonator respond result secondary coil shown in Fig signals similar siphon recorder Sir Oliver Lodge sounder spark gap syntonic Telefunken system telegraphic telephone terminals tion trans transmission transmitting station traversing tune varying vibrations wave length White Hart Street William Preece wireless telegraphy wireless telephony zinc