Liquid Compass

Liquid Compass

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The Ritchie ledgers, now held by Ritchie Navigation, indicate that this compass was manufactured on August 11, 1877, and sold to T.S. & J.D. Negus, a New York firm that sold a variety of nautical and optical instruments. It later belonged to the U.S. Coast & Geodetic Survey. The inscriptions read "RITCHIE BOSTON U.S.A." and "PATENTED APL. 7. 1863. APL. 10, 1866. MAY 12, 1868. JULY 19, 1870" and "9786."
Ref: E. S. Ritchie & Sons, Ritchie’s Liquid Compasses and Nautical Instruments (ca. 1905).
Currently not on view
Object Name
Nautical Compass (Liquid)
date made
place made
United States: Massachusetts, Boston
overall: 3 3/4 in x 5 3/4 in; 9.525 cm x 14.605 cm
overall: 4 in x 6 in; 10.16 cm x 15.24 cm
ID Number
catalog number
accession number
Credit Line
U.S. Coast & Geodetic Survey
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Medicine and Science: Physical Sciences
Measuring & Mapping
Data Source
National Museum of American History
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