K/PP107/11/3/6

Dated 1834-1837. From Scientific apparatus, musical instruments and telegraph equipment, [1834-1875].

Iron vane galvanometer probably designed for demonstrational use.  Consists of a compass needle pivoted in the middle of a coil attached to a wooden pillar with four terminals.  A current passed through the coil exerts a force on the needle, which tries to align itself with the resulting magnetic field.