細節
A 19th-century oxidised-brass spectroscopic instrument,
signed on the base Mon. Jules Duboscq Ph. Pellin Paris, the primary tube with finely engraved circles, mounted on a burnished-steel axis with vertical circle divided 0°-180° (x2), with vernier, tangent-screw fine adjustment and clamp, with sighting telescope, raised on a tapering pillar support, the base with horizontal circle, and tripod stand -- 15¾in. (40cm.) high; and a brass-cased galvanometer signed J. Carpenter, Paris, No. 5728-1
See Illustration
signed on the base Mon. Jules Duboscq Ph. Pellin Paris, the primary tube with finely engraved circles, mounted on a burnished-steel axis with vertical circle divided 0°-180° (x2), with vernier, tangent-screw fine adjustment and clamp, with sighting telescope, raised on a tapering pillar support, the base with horizontal circle, and tripod stand -- 15¾in. (40cm.) high; and a brass-cased galvanometer signed J. Carpenter, Paris, No. 5728-1
See Illustration