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Dry compass
Card- Mica with painted markings. Grey with black markings graduated to 1/4 points. Has decorated East point. Brass crossbar beneath card carries two moveable weights.
Needle- Flat edge bar type expanded at centre to accommodate pivot cap and slightly roundd at edge, 6.75" (17.2cm) long.
Pivot- Brass pivot cap, conical inside but tubular on top. Screws into needle.
Needle- Flat edge bar type expanded at centre to accommodate pivot cap and slightly roundd at edge, 6.75" (17.2cm) long.
Pivot- Brass pivot cap, conical inside but tubular on top. Screws into needle.
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Object details
| ID: | ACO0931 |
|---|---|
| Type: | Dry compass |
| Display location: | Not on display |
| Creator: | West & Co |
| Date made: | 1857 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 20 mm; Diameter: 173 mm |