A 19th Century brass 'Investigator' compound monocular microscope, by Bausch & Lomb, with rack and pinion focusing, circular stage, double nose peice, sub-stage condenser, plano-concave mirror with compass joint on pillar and tripod stand, in mahogany case with brass carrying handle -- 14in (35.5cm) high; and a distressed monocular microscope by R & J Beck in brass bound mahogany case with carrying handle -- 20½in (52cm) wide