Microscope with Accessories and Case by Powell & Lealand, London, 1848

This brass instrument is carried on trunnions on a tripod. Two mill-edged knobs at the rear of the cylindrical limb operate a rack and pinion that raises a bar, with a triangular cross section, from within the limb. The body tube is mounted on an arm, with two struts, at the top of the bar. The eyepiece pushes into the top of the body and objectives screw into a cylinder below the arm. The stage is mechanical and the movement is controlled by three milled knobs. The stage plate also rotates around the hole. Slides are held by a sprung bracket that slides on the stage plate. The Plano-concave mirror is mounted on a sliding sleeve on the lower end of the limb. The case is mahogany with a drawer and a box to hold accessories. The accessories are three brass copper alloy tubes to extend the body; two eyepieces; four objectives in cans; two sub stage condensers; a forty five degree mirror on a brass copper alloy collar; four dark wells; a specimen compressor on a brass copper alloy plate; a rotating disk with four apertures; a brass copper alloy arm and; five threaded collars and a stop. The box case has blue velvet facing the supports and padding the lid.