细节
Hartmann & Braun
a fine late 19th century lacquered brass cased galvanometer signed on the vulcanite base HARTMANN & BRAUN FRANKFURT A/M No. 17, the upper scale reading to the left 2 amp max, to the right 150 volt max, with reflecting mirror and finely balanced needle, the coil and mechanism contained within a glass cylinder with cup cover, the base incorporating three adjustable screw feet, torsion release screws, four take-off points, and universal bubble level - 10in. (25.4cm.) high
See Colour Plate
a fine late 19th century lacquered brass cased galvanometer signed on the vulcanite base HARTMANN & BRAUN FRANKFURT A/M No. 17, the upper scale reading to the left 2 amp max, to the right 150 volt max, with reflecting mirror and finely balanced needle, the coil and mechanism contained within a glass cylinder with cup cover, the base incorporating three adjustable screw feet, torsion release screws, four take-off points, and universal bubble level - 10in. (25.4cm.) high
See Colour Plate