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Description: | Black-lacquered brass sextant, triangle-pattern frame, with polished limb, wooden handle and square fitted, mahogany box, by John Crichton, London, 1880-1890. Consists of 125� inlaid silver scale of 7 1/2-inch radius (-5� to 145�) with10' divisions, silver vernier reading to 10", four shades (all green), three horizon shades (all green) and scale magnifier on a 70 mm swivelling arm. Fitted with threaded telescope bracket for two telescopes (84 mm) erect image, (185 mm) inverted image, four cross-wires and two extra draw tubes (80 mm) inverted image, two parallel cross-wires and sight tube (81 mm). | License: | http://creativecommons.org/licenses/by-nc-sa/2.5/ | Subjects: | sextant | Temporal: | 1880-1889 | Source: | Science Museum | Creator: | Crichton & Son | Identifier: | 1981-833 | Go to resource |
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