Wireless Telegraphy: Its History, Theory and Practice

action adjustment aerial wire alternating current amperes antenna apparatus armature arranged battery Branly Braun break capacity charge closed circuit coefficients coherer condenser conductor plugs connected in series consists diameter dielectric direct current disk disruptive discharge distance earth effect elec electric oscillations electric resonance electric waves electro-magnetic electrolytic emitted employed energy ether Fessenden filings frequency galvanometer glass grounded Hertz high-potential inches increased induction coil inductor insulated internal circuit interruptor Leyden jar Lodge LODGE-MUIRHEAD magnetic detector Marconi mercury metal method Morse register non-syntonized number of turns obtained ohms open-circuit open-circuit oscillator open-circuit resonator operated opposite oscillator system plate platinum polarized potential primary circuit primary coil produced radiator receptor relay resistance resonator system secondary coil shown in Fig shunt siphon recorder SLABY-ARCO spark spark-gap surface syntonized tapper telephone receiver terminals tion trans transformer transmitter tube tuned turns of wire vertical wire vibrating wave length wireless telegraphy wound