Vintage Compass for Tangent Galvanomter

£ 19.99
Vintage Compass for use with a tangent galvanometer.
This is a rudimentary form of galvanometer to detect the magnetic currents generated by charge going through a circuit. The unit gets its name from the Tangent Law of Magnetism which states that the tangent of the angle a compass needle makes is proportional to the ratio of the strengths of the two perpendicular magnetic fields.

Vintage Compass for use with a tangent galvanometer.