細節
Siemens & Halske,
an astatic elektro-dynamometor signed on the maker's plate Siemens & Halske BERLIN No. 5249 and additionally signed on the paper card dial, the twin coils and mechanism mounted on a mahogany upright with plummet level and with glazed case, the front with five resistance blocks and two screw terminals on three adjustable feet - 13in. (33cm.) high; and a Hartmann & Braun galvanometer scale with lacquered brass stand slit and wire, the scale plate 24¼in. (61.6cm.) wide (2)
an astatic elektro-dynamometor signed on the maker's plate Siemens & Halske BERLIN No. 5249 and additionally signed on the paper card dial, the twin coils and mechanism mounted on a mahogany upright with plummet level and with glazed case, the front with five resistance blocks and two screw terminals on three adjustable feet - 13in. (33cm.) high; and a Hartmann & Braun galvanometer scale with lacquered brass stand slit and wire, the scale plate 24¼in. (61.6cm.) wide (2)