The London, Edinburgh and Dublin Philosophical Magazine and Journal of Science

according activity amount angle appears applied approximately arrangement assumed atoms bismuth calculated carbon caused cent centre charge chemical collision compared conductivity considerable considered constant containing corresponding curve determined diameter direction discharge distance effect electric electrons elements energy equal equation experiments expression fact field force frequency given gives glow greater heat helium Hence hydrogen increase indicate intensity ionization ions known less light lines mean measured mercury metals method molecular molecule motion nature normal observed obtained occur particles passing Phil plane plate positive possible potential present pressure probably produced proportional quantity radiation ratio rays relation relative represented resistance respectively rotation shown shows similar solution spectrum supposed surface taken temperature theory tube vapour velocity volts wires