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Date: |
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Description: | ?459?
?A. & N.C.S.L?
The sextant has an anodized brass triangle-pattern frame and a wooden handle. The tangent screw and clamping screw are on the back of the index arm. The instrument has four green shades and three green horizon shades. Index-glass adjustment is made by a screw and on the horizon-glass by a worm gear and a capped milled knob.
Attached to the sextant is a magnifier on an 83mm swivelling arm, with a frosted glass shade. There is also a threaded telescope bracket in two parts, fitted for correcting collimation error. It has perpendicular adjustment made by a rising-piece and a milled knob. The telescope is 186 mm in length with an inverted image, and two parallel cross wires, which are broken. A second telescope is 84 mm long with an erect image (star finder). It has a green shaded eyepiece and an adjusting pin. Several unidentified parts are missing.
The instrument has a polished brass limb with an inlaid silver scale from -5� to 150� by 10 arcminutes, measuring to 125�. The sextant has a silver vernier measuring to 10 arcseconds, with zero at the right.
The sextant is contained in a square fitted wooden box with a blank brass plate on the lid, lined with green textile, and containing a trade label for George Lee and Son, Portsmouth (before 1912). There is also in the lid a Class A Kew Observatory certificate of examination, dated 1892.
This instrument was captured by the donor, then a midshipman in HMS ?Centurion?, from the naval school at the Pei Yang Arsenal, near Tientsin, China, during the Boxer Rebellion in 1900. The Army and Navy Co-operative Society Ltd in London was retailer. It is likely that they obtained their sextants from a local manufacturer like Elliott Brothers who, like the Society, were situated in the Strand, or from Henry Hughes and Son or Heath and Co.
AUDIT - object needs marking with its NAV number and 4 parts numbered. Inscription.
caption: Sextant - Front
caption: Sextant - Back
caption: Sextant - Inscription
caption: Sextant - Box
caption: Sextant - Box Label
caption: unavailable | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | Sextant Centurion 1892 Pei Yang Arsenal Naval School Instruments of Navigation Vernier sextants | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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