细节
A fine 19th-Century lacquered-brass compound monocular microscope,
signed on the tripod stand R & J BECK LONDON & PHILADELPHIA NO. 11773, with rack and pinion coarse and micrometer fine focusing, triple nose-piece, sub-stage condenser, plano-concave mirror, with accessories, including a 1/10th oil immersion objective, in mahogany case with brass carrying handle -- 13¼in. (33.6cm.) high
See Colour Plate 1
signed on the tripod stand R & J BECK LONDON & PHILADELPHIA NO. 11773, with rack and pinion coarse and micrometer fine focusing, triple nose-piece, sub-stage condenser, plano-concave mirror, with accessories, including a 1/10th oil immersion objective, in mahogany case with brass carrying handle -- 13¼in. (33.6cm.) high
See Colour Plate 1