A black-enamelled and chromium-plated compound monocular microscope,

细节
A black-enamelled and chromium-plated compound monocular microscope,
by Cooke, Troughton & Simms, No. M.70532, with polarising attachments, rack and pinion coarse with micrometer fine focusing, circuit stage, mechanical specimen holders with adjustment sub-stage condenser and plano-concave mirror, with accessories, in mahogany case 14¼in. (36.2cm.) high

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