An 18th-Century compound monocular microscope, signed on the body tube B. Martin, Inv et. Fecit, London., the body tube located on an arm from the tubular vertical support with rack and pinion focusing, the eared stage with mountings for bull's-eye condenser and frog plate, a numbered set of 5 objectives, swivel mirror, forceps and bone sliders, the Y-shaped stand in pyramid-shaped mahogany case (restored) - 14in. (35.6cm.) high.