Liquid Compass

Liquid Compass

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This compass has a heavy brass bowl gimbal mounted in a wooden box and a flat card with central buoyancy. The inscriptions read "E. S. RITCHIE BOSTON 23924" and "PATENTED" and "RITCHIE, BOSTON U.S.A." The Ritchie ledgers, now held by Ritchie Navigation, indicate that it was made on May 7, 1898, and sold to T.S. & J.D. Negus, a New York firm that sold a variety of nautical and optical instruments.
Currently not on view
Object Name
Nautical Compass (Dry Card)
Mariner's Compass
date made
place made
United States: Massachusetts, Boston
box: 8 1/4 in x 8 1/4 in; 20.955 cm x 20.955 cm
gimbal ring: 6 in; 15.24 cm
compass card: 3 3/4 in; 9.525 cm
overall: 7 3/4 in x 8 1/4 in x 8 3/8 in; 19.685 cm x 20.955 cm x 21.2725 cm
ID Number
catalog number
accession number
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Medicine and Science: Physical Sciences
Measuring & Mapping
Data Source
National Museum of American History
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