Liquid compass

Bowl: Black painted brass, filler plug at side, expansion chamber at base incorporated with tripod mounting spigot. Inside of bowl painted white with a black wire lubber pointer projecting from the side. Fitted with an azimuth circle (Schmalcalder type prism and two dark shades missing) having a spirit level and an open frame with thread and dark glass reflector (glass broken)
Card: Dia 3.75" (9.5 cm) white-painted with black markings, graduated to 16 points and to 360 deg from South point with inverted graduations.
Needle: Unsighted
Pivot: Unsighted
O.A. Height 7.5" (19.0 cm)
In wooden box 7.0" x 7.0" x 6.26" (17.8 x 17.8 x 15.9 cm)

Object Details

ID: ACO0108
Type: Liquid compass
Display location: Not on display
Creator: Johnson Ltd; Edward John Dent & Co.
Date made: 1912
Credit: National Maritime Museum, Greenwich, London, Admiralty Compass Observatory
Measurements: Overall: 110 mm; Diameter: 130 mm
Parts: Liquid compass