Signedon top of case: GILLIS & GLEESON / BOSTON
on coil: Gennert & Holzke, New York
FunctionThis galvanometer was used in the classroom to detect heavy currents and possibly used with a low resistance thermo-couple. An astatic galvanometer is a sensitive instrument that measures small current displacements. When an electric current passes through a wire coil, it induces a magnetic field that causes the coil to rotate in proportion to the current deflections, twisting a suspended magnet. The current deflections can be detected using a scale.
ProvenanceFrom the Department of Physics, Harvard University, 11/21/1956.