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Dry compass
Dry compass
Card: Mica covered with paper. Black with white markings, graduated to half points with decorated E point.
Needle: Heavy edge type, 4.9" (12.6 cm) in length, with expanded centre which has aperture for pivot cap. Fitted with two brass sliding balance weights also a brass cross bar with sliding balance weights, running E-W.
Pivot: Cone shaped brass pivot cap fitted with jewel at top, screwed through aperture in needle.
Card: Mica covered with paper. Black with white markings, graduated to half points with decorated E point.
Needle: Heavy edge type, 4.9" (12.6 cm) in length, with expanded centre which has aperture for pivot cap. Fitted with two brass sliding balance weights also a brass cross bar with sliding balance weights, running E-W.
Pivot: Cone shaped brass pivot cap fitted with jewel at top, screwed through aperture in needle.
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Object Details
| ID: | ACO1012 |
|---|---|
| Type: | Dry compass |
| Display location: | Not on display |
| Creator: | West & Co |
| Date made: | circa 1850 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 25 mm; Diameter: 125 mm |