Signedunsigned
Inscribedstamped on base: 8-50
painted on base: EM
FunctionThis galvanometer was used in classroom demonstrations to measure electric currents. A compass needle is pivoted in the middle of a coil. Passing a current through the coil exerts a torque on the needle, which then aligns itself with the resulting magnetic field.
ProvenanceFrom the Jefferson Laboratory, Department of Physics, Harvard University, 12/12/1956.