A mid 19th-Century lacquered brass compound monocular microscope, signed and dated on the limb, Powell & Lealand, 4 Seymour Place, Euston Square, London 1848, the body tube with twin diagonal supports, rack and pinion focusing, mechanical stage and swivel mirror on a cast tripod shaped stand, the pad feet with cork inserts - 14¾in. (37.5cm.) high (lowered).