Compound Microscope in Case with Accessories, by J. Bleuler, London, c. 1800-25

This copper alloy instrument has a pillar, with a triangular section that stands on a compass joint on a flat, folding tripod foot. The cruciform stage has three pinholes, one of which is square, and a recessed stage hole. It is racked up and down on the pillar for focusing. A ring on two pins is set on the stage to hold specimens. The body screws into the end of an arm that slides into a pivoting bracket at the top of the stand. This gives the body aquatic movement. Objective lenses, or a rotating disk with six objectives, screw into the underside of the arm. The eyepiece has two lenses and screws into the body tube which also holds two lenses. A sliding sleeve below the stage holds a condensing lens on a pivoting arm and a lower sleeve holds the Plano-concave mirror in a horseshoe mount. The accessories comprise two objectives with dust covers, two objectives with Lieberkühn and a Lieberkühn with a carrier on a square sectioned pin, , and a simple lens in a blackened eyecup, a fishplate, a cone condenser, copper alloy forceps, stage forceps on a steel pin, a super stage bull's-eye lens, a Martin's triple stage, a steel pin on an ivory handle.