Photograph

Wooden frame containing five photographs of representative compass cards collected for exhibition in Norway in 1949.
1. Two needles in form of a parallelogram, 17th & 18th Centuries.
2. Single flat needle as used in Dr.Knight's compass. 1750-1794
3. Four laminated needles on edge. Admiralty Standard Compass. 1842-1889
4. Eight light needles -Lord Kelvin's card. 1876-1948
5. Liquid compass card with float and two round needles. 1906-1948

Object Details

ID: ACO0454
Type: Photograph
Display location: Not on display
Creator: Admiralty Compass Observatory
Date made: 1949
People: Knight, Gowin; Thomson, William
Credit: National Maritime Museum, Greenwich, London, Admiralty Compass Observatory
Measurements: Overall: 23 mm x 851 mm x 234 mm
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