An early 19th-Century brass "Jones's Most Improved" compound monocular microscope,

细节
An early 19th-Century brass "Jones's Most Improved" compound monocular microscope,
signed on the folding tripod stand Davis LEEDS, with rack and pinion focusing, sprung stage, plano-concave mirror and compass joint to the stand, with forceps, bull's-eye condensor and other accessories, in mahogany case -- 11in. (28cm.) wide

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