Liquid Compass

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An illustration of a liquid compass. “A, Bowl, partly in section; B, Expansion chamber; D, The glass; G, Gimbal ring; L, Nut to expand chamber when filling bowl; M, Screw connector; N, Hole for filling; O, Magnetic needle; P, Buoyant chamber; Q, Iridium pivot; R, Sapphire cap; S, Mica card.” -Britannica, 1910




Encyclopaedia Britannica (11th ed., vol. 6) (New York, NY: The Encyclopaedia Britannica Company, 1910)


TIFF (full resolution)

2400×1561, 858.1 KiB

Large GIF

1024×666, 141.1 KiB

Medium GIF

640×416, 76.1 KiB

Small GIF

320×208, 27.8 KiB