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Date: |
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Description: | ?J. Lort Stokes?
?Schmalcalder, 82, Strand, London?
The sextant consists of circular polished brass plates with a lid that when screwed on the back of the instrument serves as the handle. The index arm is moved by a milled knob on the upper plate. The sextant has two index shades, in red and green, which are moved by levers. There are no horizon shades. Index-glass adjustment is made by a screw and on the horizon-glass by a square headed screw, using a milled key shipped in the upper plate. Attached to the sextant is a single lens magnifier on a 75mm swivelling arm attached at the pivot. The sight-tube is 19 mm in length and is fitted in the body of the instrument. The sextant is contained in a leather case marked, ?D.146?, with a sling strap.
The instrument has an inlaid silver scale from -5� to 152� by 30 arcminutes, measuring to 139� (the digits are read from the pivot). The sextant has a silver vernier measuring to 1 arcminute, with zero at the left.
AUDIT - object needs marking with its ID number and 1 part numbered. Inscription.
caption: Box Sextant - Front
caption: Box Sextant - Back
caption: Box Sextant - Inscription
caption: Box Sextant -Case and Lid
caption: unavailable | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | box sextants Sextant John Lort Vernier Stokes | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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