Monocular Compound Microscope with Accessories in Case, by Powell and Lealand, London, 1892

Monocular compound Microscope, by Powell and Lealand. The limb of this copper alloy instrument is carried on trunnions on a tripod. The body tube is mounted on an arm attached to a triangular sectioned bar that can be racked up from within the limb for coarse focusing. A graduated screw on the arm adjusts the fine focus. There are three body tubes the largest of which has a draw tube moved by a rack and pinion. Eyepieces push into the top of the body and objectives screw into a cylinder below the arm. Slides are held by a sprung bracket that slides on the mechanical stage plate. The sub stage assembly can be aligned and focused. The Plano-concave mirror is mounted on a sliding sleeve on the lower end of the limb.

The microscope is stored in a mahogany cabinet with internal glass panel, allowing the case to act a display cabinet. The case has three drawers that hold accessories. The accessories are an eyepiece micrometre on a telescoping stand with a circular lead-weighted base, thirty five objectives in cans, two empty cans, seventeen eyepieces, nine collars, a frosted glass disc in a collar, a double objective changer, three nose fittings,, two achromatic condensers with rotating aperture discs (one is in position beneath the stage), a nicol prism polarizer, condenser with three quarter wave discs on a swinging column, dark ground illuminator, parabolic condenser, a 'Formula 3' condenser by Nelson, condensing lens in rectangular plate, dark ground condenser, seven funnel shaped stops, 10 dark ground stops (6 of which are stored in a can), a lens in a can, a specimen chamber on rectangular base, a glass square in a can, and a cylindrical leather case.