AN EARLY ANDREW PRITCHARD COMPOUND MONOCULAR MICROSCOPE,, English, 1835-1838

AN EARLY ANDREW PRITCHARD COMPOUND MONOCULAR MICROSCOPE, English, 1835-1838,
signed on tube and foot, Andrew Pritchard, 263 Strand London, with pinion focusing to the racked column of triangular section, mounted in a trunnion above adjustable column and shaped tripod base, in mahogany case with ocular, mechanical stage, objective, Lieberkühn and live box, 20in (51cm) high