Electric Illumination, Bind 1

action alternating currents Ampères apparatus arc lamps armature ring arrangement attached axis battery bobbins brushes cable carbon holder centimetre coils of wire commutator conductors connected consists construction copper copper wire cylinder diameter direction disc dynamo-electric machines Edison electric current electric light electro-magnets electromotive force employed energy exciting external circuit field magnets fixed frame galvanometer Gramme machine heat horizontal illustrated incandescence increase intensity iron core Jablochkoff candles length lever lines of force lower carbon magnet coils magnetic field magnetic force magnetisation magneto-electric mechanical Meritens metal millimetres number of lines Ohms opposite pair patented permanent magnets placed plates polarity pole-pieces portion position produced pulley radial regulating resistance revolutions per minute revolving rotation round screw segments shaft shown in Fig shunt side Siemens soft iron solenoid speed spindle spring strength terminals tube upper carbon vertical voltaic voltaic arc wheel wound