The following
was extracted from the 1880 Priced and
Illustrated Catalogue of Optical Instrument
by James W. Queen & Co.:
3096. QUEEN'S
STUDENT'S MICROSCOPE, MONOCULAR, 14 inches
high, of highly finished brass; Stage of
Glass, with perfectly smooth motions in all
directions; Plane and Concave Mirrors;
Revolving Diaphragm, which may be entirely
removed when extremely oblique illumination
is required; Draw-Tube; Rack and Pinion and
Fine Screw adjustments for focus. With Upright Walnut Case with brass handle and lock and key
Queen advertisment, 1879