A Leeds & Northrup (LN) galvanometer. This was a “second-generation” electrical-measurements instrument developed about 1950. “First-generation” galvanometers used mechanical movements and mirrors to detect small deflections produced by currents in a magnet coil. Unfortunately, the plate indicating a model number is missing. Records from LN indicate that early models of this style of galvanometer were housed in wooden boxes while later models were manufactured with a more-compact Bakelite case. This earlier-model unit is housed in a wooden box that measures 8.5 cm by 17 cm by 13.5 cm in height. The scale reads +/- 15 units.
