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Dry compass
Card- Mica covered with paper, white with black markings, graduated to 1/2 points and quadrantally in degrees, with decorated East point.
Needle- Flat bar type with pointed ends 6.9" (17.6cm) in length. The centre of needle expanded to provide aperture for heavy pivot carrier. Secured to card by four screws.
Pivot- Large cone-shaped cap with jewel at top, screwed in heavy carrier secured at centre of needle.
Needle- Flat bar type with pointed ends 6.9" (17.6cm) in length. The centre of needle expanded to provide aperture for heavy pivot carrier. Secured to card by four screws.
Pivot- Large cone-shaped cap with jewel at top, screwed in heavy carrier secured at centre of needle.
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Object details
| ID: | ACO0933 |
|---|---|
| Type: | Dry compass |
| Display location: | Not on display |
| Creator: | Preston, Grant |
| Date made: | 1840 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 20 mm; Diameter: 175 mm |