Binocular Compound Microscope, Case and Accessories

The binocular body tube of this copper alloy microscope is mounted on a rack and pinion, for focusing, supported by the cylindrical limb. The inter-ocular distance is adjusted by a mill-edged knob near the top of the body that racks the eyepieces in and out of the tubes. The nose has an internal thread to take objectives. The limb is held on trunnions on flat tripod base. Two of the feet are towards the rear of the instrument. The rectangular stage is attached to the limb at the level of the trunnions. Two dovetail slots take sliding bars on which a bracket and spring, to hold specimens, are set. One of the bars has a pinhole for accessories. A graduated knob behind stage operates the fine focus. A cylinder mounted below the stage holds a rotating disk with three apertures. A cylindrical post extends below the stage and a sliding sleeve supports the plano-concave mirror in a horseshoe mount on an arm. The fitted wooden case also holds two eyepieces, three objectives in cans, a Lieberkühn with a dust cover, a monocular draw tube with graduations on the side, stage forceps on a copper alloy pin with a cork disk, three central substage dark wells and a collar to carry them, a condenser lens on a pin attached to a weighted copper alloy stand by a ball and socket joint, two polarizing prisms, an erector tube, a copper alloy stage plate, a specimen chamber on a copper alloy plate, forceps, Nicol prism analyser and a glass disk set in blackened copper alloy.