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Dry compass
Dry compass
Card: Mica covered with paper, black with white and black markings, graduated to 32 points with decorated E point, edge of card graduated quadrantally in degrees.
Needle: Flat bar type, 4.9" (12.6 cm) in length. Has expanded centre which has an aperture for pivot cap. Has several blobs of sealing wax to balance the card.
Pivot: Cone shaped brass pivot cap fitted with jewel at top, screwed through aperture in needle.
Card: Mica covered with paper, black with white and black markings, graduated to 32 points with decorated E point, edge of card graduated quadrantally in degrees.
Needle: Flat bar type, 4.9" (12.6 cm) in length. Has expanded centre which has an aperture for pivot cap. Has several blobs of sealing wax to balance the card.
Pivot: Cone shaped brass pivot cap fitted with jewel at top, screwed through aperture in needle.
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Object Details
| ID: | ACO1010 |
|---|---|
| Type: | Dry compass |
| Display location: | Not on display |
| Creator: | Spencer Browning & Rust |
| Date made: | circa 1850 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 20 mm; Diameter: 124 mm |