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Dry compass
Card- Mica covered with paper. White with black and white markings, graduated to 1/4 points graduated quadrantally in degrees.
Needle- Two edge bar needles 7.5" length of rolled and hammered clock spring steel, arranged in lozenge form with their ends riveted together.
Pivot-Inverted type, mounted in a metal dome secured to centre of card.
Needle- Two edge bar needles 7.5" length of rolled and hammered clock spring steel, arranged in lozenge form with their ends riveted together.
Pivot-Inverted type, mounted in a metal dome secured to centre of card.
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Object Details
| ID: | ACO0937 |
|---|---|
| Type: | Dry compass |
| Display location: | Not on display |
| Creator: | Robinson, Thomas Charles; Robinson |
| Date made: | 1837-1840; 1837-40 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 40 mm; Diameter: 190 mm |