Signedon metal plaque mounted on front of cabinet: GENERAL ELECTRIC / GALVANOMETER / CAT.32C 223 630 / N.P. 68288-B SCHENECTADY, N.Y. MADE IN U.S.A.
Inscribedon black painted glass plaque on back of cabinet, above top left terminal: GA
above top right terminal: 6 VOLTS
below bottom left terminal: N.P. 113664
FunctionA self-contained galvanometer with a movable coil wrapped around the frame of the galvanometer. The coil is suspended between the poles of a magnet, and when a current is applied, the coil twists in response to the interaction of the current through the coil and the magnetic field generated by the magnet. This galvanometer was used in conjunction with a 6-volt optical source to make voltage measurements for demonstration purposes in Harvard's Jefferson Laboratory. The light beam reflects from the mirror on the galvanometer movement and this deflection can then be read from the scale on the exterior of the wooden cabinet.
ProvenanceFrom the Department of Physics, Jefferson Laboratory, Harvard University, 1/1980.