Convertible instrument that can be used as a simple microscope or a compound mocroscope. It has rack and pinion, stage, and sub-stage mirror, and it fits into and stands on a small wooden box. The “Carey, LONDON” inscription refers to a large, long-lived, and prolific family of instruments makers known variously as Cary and Carey. Charles Gould, an employee of William Cary, described the form in 1827, and probably devised it as well.
Ref: William Gould, The Companion to the Microscope and a Description of C. Gould’s Improved Pocket Compound Microscope, Which has all the Uses of the Single, Compound, and Opaque Microscopes (London, 1827).
G. L’E. Turner, The Great Age of the Microscope (Bristol, 1989), pp. 79-85.
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