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Description: | Brass quarter of a circle with two sights, and an engraved scale from 0�-90� by 1�. Every 5� the lines have been extended to the apex of the instrument. The plumb bob is a probably a later replacement. The back of the quadrant is blanc, but for a thinly engraved circle with a diameter of 108 mm.
This is a mariner's or surveyor's quadrant. It is used to determine the elevation of a celestial body above the horizon or the angle of elevation of a building or geographical feature. The sights and plumb bob are intact.
A polished brass quarter circle with two sights on the right-hand edge. The back of the instrument is blank apart from a thinly engraved circle with a diameter of 108 mm.
Presented by Sir James Caird in 1947; purchased as part of the Barberini collection through Maggs Brothers.
Mariner?s quadrant with an engraved scale along the circular edge of the instrument, from 0� to 90� by 1�. Every five degree line has been extended to the apex of the instrument. The plumb bob is probably a later replacement.
There is an online description in the 'Notebook' field.
caption: Mariner's Quadrant - Front
caption: Mariner's Quadrant - Back
caption: unavailable
caption: Obverse of mariner's quadrant | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | Quadrant mariners' quadrants | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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