A late 19th-century lacquered brass Powell Lealand No.3 compound monocular microscope, signed on the arm POWELL & LEALAND 170 Euston Road LONDON and dated 1897, with rack and pinion focusing double nose-piece signed Ross No 106 London, with Powell & Lealand 1/12 apochromatic oil immersion and 4/10 apochromatic objectives, mechanical stage, Powell & Lealand substage with rack and pinion adjustment and plano-concave mirror, on cast and shaped tripod stand, the pad-feet with cork inserts, with Abbe condenser and other items, in mahogany case 17in. (43.2cm.) high