A good late 19th-Century lacquered and oxidised-brass German planimeter, stamped OTT & CORDI KEMPTEN No.147 , with weighted circular brass base, graduated arm and micrometer wheels, and circular paper table of values with manuscript entries, dated 16/II 79 , in a fitted and black velvet-lined leather-covered triangular case, stamped Ott & Coradi Kempten -- 28.8cm. (11 3/8in.) wide ; a 19th-Century lacquered-brass camera lucida, signed WATKINS & HILL, Charing Cross , with prism, aperture shade and table clamp, in a red plush-lined and leather-covered case -- 22.2cm. (8¾in.) wide ; and a pair of brass and steel proportional compasses signed T. Harris & Son London , with graduations for plans, solids, circles and lines, screw clamp and fine-screw adjustment -- 15.2cm. (6in.) long See Illustration (3)
A good late 19th-Century lacquered and oxidised-brass German planimeter, stamped OTT & CORDI KEMPTEN No.147 , with weighted circular brass base, graduated arm and micrometer wheels, and circular paper table of values with manuscript entries, dated 16/II 79 , in a fitted and black velvet-lined leather-covered triangular case, stamped Ott & Coradi Kempten -- 28.8cm. (11 3/8in.) wide ; a 19th-Century lacquered-brass camera lucida, signed WATKINS & HILL, Charing Cross , with prism, aperture shade and table clamp, in a red plush-lined and leather-covered case -- 22.2cm. (8¾in.) wide ; and a pair of brass and steel proportional compasses signed T. Harris & Son London , with graduations for plans, solids, circles and lines, screw clamp and fine-screw adjustment -- 15.2cm. (6in.) long See Illustration (3)
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