Signedon metal plaque on base: CENTRAL SCIENTIFIC CO. / LABORATORY SUPPLIES / APPARATUS CHEMICALS / CHICAGO, U.S.A.
FunctionThis galvanometer was used for classroom demonstration 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 Department of Physics, Harvard University.