This brass compound monocular microscope was made by Philadelphia instrument maker James W. Queen and Company during the early 1870s. The model featured below was redrawn from photographs of the original microscope, which is part of the Billings microscope collection at Walter Reed Army Hospital in Washington DC.

The microscope is positioned on a sturdy claw-footed base with two upright supports for the limb. A tubular limb supports the body tube arm, the stage, and the substage double mirror assemblies. Focusing is achieved with a rack and pinion mechanism that moves the body tube with respect to the stage. The stage has a recessed aperture and openings for the substage condenser or a cylinder disk with diaphragms.

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