Compound Microscope, English, Early 19th Century

Compound Microscope. There are two means of coarse focusing. Fine focusing is by a vertical screw that alters the distance between the collars.

Stand. A turned brass arm supports the body tube and is attached to the top of the pillar by a hinge. A rack and pinion on the lower section of the body telescopes a tube on which screws the objective. The height of the stage can also be adjusted. The square cross-sectioned upper part of the pillar is graduated. The stage is held by two collars, one with a tightening screw, that slide on this section of the pillar. The lower part of the pillar is turned and stands on a flat tripod.

Eyepiece. The eyepiece screws into the top of the tube. It has a blackened brass eye-cap with a sliding dust cover and a collar that screws into the inside secures a biconvex lens.

Upper body tube. The removable upper section of the body tube holds a field lens.

Objective in a lieberkuhn

Concave mirror mounts on the tripod below the stage