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Dry compass
Card-Mica covered with paper, white with white and black markings, graduated to 1/4 points and quadrantally in degrees.
Needle- Four short compound edge bar needles, 2 x 3.6" and 2 x 2.7" long, each composed of three laminations of steel. Two brass strips, one E-W and one N-S carrying sliding weights are fitted. The whole is attached on two metal rings 3.5" and 6.75" diameter, the outer being screwed to card.
Needle- Four short compound edge bar needles, 2 x 3.6" and 2 x 2.7" long, each composed of three laminations of steel. Two brass strips, one E-W and one N-S carrying sliding weights are fitted. The whole is attached on two metal rings 3.5" and 6.75" diameter, the outer being screwed to card.
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Object Details
| ID: | ACO0987 |
|---|---|
| Type: | Dry compass |
| Display location: | Not on display |
| Creator: | Unknown |
| Date made: | 1861 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 20 mm; Diameter: 190 mm |
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