The Principles of Electric Wave Telegraphy

aerial alternating current ammeter amperes battery calculated capacity carbon centimetres charged conductor connected continuous current copper wire curve cymometer damping deflection detector diameter dielectric constant dielectric strength disc discharge distance ebonite electric force electric oscillations electric waves Electrician electrodes electromotive force employed energy equal equation expression formula galvanometer given glass helix Hence high frequency high frequency currents high frequency resistance hysteresis inches increase induction coil insulated interrupter iron J. J. Thomson kilovolts Leyden jar logarithmic decrement low frequency magnetic force maximum value measured mercury metal method microfarads obtained ohms oscillation transformer oscillatory circuit period placed plates platinum potential difference primary circuit produced quantity radiation radiotelegraphy ratio refractive index resonance secondary circuit shunt spark balls spark gap spark length spark resistance spark voltage spiral surface telegraphy temperature terminals thick tinfoil tube velocity volts wave length