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Description: | Anodized brass sextant, double-frame bridge (straight-bar) type, with polished brass limb and wooden handle, by W Harris and Company, 50 Holborn London, England, 1830-1839. Consists of inlaid 120� silver scale (-5� to 149�) with 10' divisions, gold vernier scale (20") two sets of filter shades (3 & 2, red & green) and reading magnifier on a on a worm screw. Fitted with threaded telescope bracket with collimation correction for two telescopes, 83mm (erect image). | License: | http://creativecommons.org/licenses/by-nc-sa/2.5/ | Subjects: | sextant | Temporal: | 1830-1839 | Source: | Science Museum | Creator: | W Harris and Company | Identifier: | 1908-130 | Go to resource |
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