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Dry compass
Card- Mica covered with paper. White with black markings, graduated to 1/2 points with a decorated East point, graduated quadrantally in degrees. At centre of card is a 2" hole to accommodate pivot mounting. One balancing stud at S by W point.
Needle- Four light edge bar needles 2 x 6", 2 x 3" mounted on a light metal rim.
Pivot- Inverted type, carried in a double gimbal which is attached to card by two knee pieces of metal.
Needle- Four light edge bar needles 2 x 6", 2 x 3" mounted on a light metal rim.
Pivot- Inverted type, carried in a double gimbal which is attached to card by two knee pieces of metal.
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Object Details
| ID: | ACO0935 |
|---|---|
| Type: | Dry compass |
| Display location: | Not on display |
| Creator: | Preston, Grant |
| Date made: | 1844 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 20 mm; Diameter: 170 mm |
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