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Dry compass
Card-Mica covered with paper, black with white markings, graduated to 1/2 points, with decorated N & E points.
Needle- Single "T" shaped fin 5" (12.7cm) long, cut away at centre to accommodate the jewelled pivot cup.
Pivot- Jewelled pivot carried at top of pivot cup which extends 0.75" (2cm) above card. A small metal disc is secured to the lower end of the socket which carries the cup, which has a small aperture through which the pivot passess to the cup.
Needle- Single "T" shaped fin 5" (12.7cm) long, cut away at centre to accommodate the jewelled pivot cup.
Pivot- Jewelled pivot carried at top of pivot cup which extends 0.75" (2cm) above card. A small metal disc is secured to the lower end of the socket which carries the cup, which has a small aperture through which the pivot passess to the cup.
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Object Details
| ID: | ACO0981 |
|---|---|
| Type: | Dry compass |
| Display location: | Not on display |
| Creator: | Unknown |
| Date made: | 1844 |
| People: | Walker, William |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 35 mm; Diameter: 125 mm |
| Parts: | Dry compass |