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Description: | Pocket box sextant, unsigned, English, 1845-1855. Consists of two circular lacquered brass plates with lid that acts as a handle when used. Fitted with Inlaid silver 124� scale (-5� to 145�) with 30' divisions and a silver vernier (1' div.). The index arm is rotated by a milled knob on the upper plate with two filter shades (red & green) operated by lever. The index glass is fixed with adjustment for the horizon glass. Fitted with magnifier (single lens) on hinged 35 mm swivel arm and choice of a large and a small pinhole sight but telescope missing. | License: | http://creativecommons.org/licenses/by-nc-sa/2.5/ | Subjects: | box sextant | Temporal: | 1845-1855 | Source: | Science Museum | Creator: | Unknown maker | Identifier: | 1979-272 | Go to resource |
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