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Date: |
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Description: | Made by Tho Wright in Fleet Street
Graduations-Circle graduated to 360 degs. Vernier scale at one end of alidade 0-60.
Sights-Two detachable sight vanes 5" (12.7cm) long mounted on circle, one sight with a vertical slit with a rectangular aperture above (threaded), the other with a rectangular aperture (threaded) with a vertical slit above. Two detachable sight vanes 4.5" (11.4cm) long, mounted on alidade, similar in description to those on circle.
Compass- Dia. 5.2" (13.1cm) mounted at centre of instrument. Fitted with a narrow tapered blued steel needle 3.75" (9.5cm) long, with a brass pivot cap at centre. Graduated to 16 points, quadrantally in degrees and anti-clockwise to 360 degs.
In wooden box 12.75 x 12.75 x 3" ( 32.4 x 32.4 x 7.6cm)
AUDIT - object needs to be marked with its NAV number. Five unnumbered parts. | Publisher: | "http://collections.rmg.co.uk/" | Subjects: | circumferentors | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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