Dip Circle

This Kew pattern dip circle dates from the early decades of the twentieth century. It is marked "Dover, Charlton Kent, Circle 158." A paper note in the wooden carrying case states that the U.S. Navy lent it for observations during the second International Polar Year which ran from September 1932 to September 1933. The loan may have been to the Carnegie Institution of Washington which, fifty years later, donated it to the Smithsonian.
Currently not on view
Object Name
dip circle
Physical Description
metal (overall material)
wood (part material)
overall: 10 in; 25.4 cm
Place Made
United Kingdom: England, London, Charlton
ID Number
accession number
catalog number
Measuring & Mapping
Science & Mathematics
Science & Scientific Instruments
Science & Scientific Instruments
See more items in
Medicine and Science: Physical Sciences
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Carnegie Institution of Washington

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