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Compass card
Dry compass
Card: The paper band is supported by the metal circumference and by fine silk threads. The paper is white with black markings graduated to quarter points and quadrantally in degrees.
Needle: The four needles in 2 sets of 2, are suspended beneath the card by an independent silk thread system. Length 2.75" and 2.0" (7 cm and 5.2 cm)
Pivot: Consists only of an aluminium washer which holds the silk threads.
Card: The paper band is supported by the metal circumference and by fine silk threads. The paper is white with black markings graduated to quarter points and quadrantally in degrees.
Needle: The four needles in 2 sets of 2, are suspended beneath the card by an independent silk thread system. Length 2.75" and 2.0" (7 cm and 5.2 cm)
Pivot: Consists only of an aluminium washer which holds the silk threads.
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Object details
| ID: | ACO1024 |
|---|---|
| Type: | Compass card |
| Display location: | Not on display |
| Creator: | Kelvin & James White Ltd; Thomson, William |
| Date made: | 1879 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 8 mm; Diameter: 152 mm |