Compound Microscope, by George Dollond, London, Early 19th Century

The wooden box base has a drawer for accessories. A boss in one corner on top holds a pillar with a square cross section. The stage has two wings with slots for accessories and is moved by a rack and pinion for focusing. Below the stage a screw-tightened collar carries the plano-concave mirror. An arm at the top of the pillar supports the body tube in a collar. The objectives are mounted in a dovetailed brass bar that slides under the collar.

Accessories include: a brass collar on a rod, a brass disc an ivory slider, a glass disc, a black and white disc and an ivory talc box containing brass rings.