Dip Circle

The Department of Terrestrial Magnetism of the Carnegie Institution of Washington bought this Kew pattern dip circle in 1919. It is marked "Dover, Charlton Kent, Circle 240." With four needles, tripod, case, Kew certificate of examination, and importation charges, it cost $184.70. The vertical circle is silvered, graduated to 30 minutes, and read by opposite verniers to single minutes. The horizontal circle is silvered, graduated to 30 minutes, and read by vernier to single minutes.
Currently not on view
Object Name
dip circle
Date made
ca 1919
Physical Description
metal (overall material)
overall: 10 in; 25.4 cm
Place Made
United Kingdom: England, London, Charlton
ID Number
accession number
catalog number
Science & Scientific Instruments
Science & Scientific Instruments
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Science & Mathematics
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Carnegie Institution of Washington

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