198 (detail)


201 199. A BRASS SCREW-BARREL POCKET MICROSCOPE, C.1780


unsigned,with three eye-pieces, sprung slide cassette retainer and one brass three-aperture slide, contained in original fitted plush- lined shark-skin box with securing hooks -- 3¼in. (8.3cm.) wide


£500-800 200.


A SET OF 19TH-CENTURY EBONISED IVORY MICROSCOPE SLIDES


198 198.


A FINE LACQUERED-BRASS ‘ACHROMATIC ENGIOSCOPE’ (BOTANICAL MICROSCOPE) AND ACCESSORIES BY ANDREW PRITCHARD, CIRCA 1840


signed on the foot Andrew Pritchard / 162 Fleet St. London, hinged candle socket with bull’s-eye lens, yew wood arm rest, assorted platforms and stages, 9in. monocular tube with rack- and-pinion fine focus, contained in fitted walnut case with five drawers of accessories including two sides of original manuscript instructions and a magnification rate card, both thought to be in Pritchard’s hand, and bull’s-eye magnifier - 12in. (30.5cm.) square; together with a copy of Pritchard’s History of Infusoria, 1862, London, 4th Edition, owner’s autograph dated 1862 on frontispiece, 968 pages, the back containing forty plates of engraved specimens, some hand coloured


(2) £2500-4000


unsigned, each pierced for four [mostly organic] samples, and numbered in pencil from 1-12 inclusive, contained in original imitation fish-skin pocket case with marbled edges (six blank spaces) -- 3½in. (9cm.) high


£250-400 201.


AN EARLY 19TH-CENTURY IVORY AND BRASS POCKET BOTANICAL MICROSCOPE OR NATURALIST’S MAGNIFIER


unsigned, with simple lacquered-brass frame with threaded aperture for two eye-pieces, steel and ivory pincer, supported with threaded ivory handle and contained in fitted case with red morocco covering and securing hooks -- 6in. (15cm.) diameter


This type of microscope was introduced in 1798 by W.&.S. Cary and remained popular for much of the 19th Century.


£800-1000


199


200


68


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