A late 19th-century drekspulgalvanometer signed on the tripod stand EDLEMANN MUNCHEN, the black enamelled and lacquered-brass frame with glass tension wire tube, two viewing windows, the 16 iron bar magnels arranged within four adjustable clamps, the base plate stencilled in white E.85, the stand with rotation screw clamp on three adjustable screw feet, 22in. (56cm.) high; and a Hartmann & Braun - pattern galvanometer with maker's trademark, no.1216 9¼in. (23.5cm.) high