Dip Circle

Dip Circle

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Description
The Department of Terrestrial Magnetism of the Carnegie Institution of Washington bought this Kew pattern dip circle in 1919. The inscription reads "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.
Location
Currently not on view
Object Name
dip circle
Date made
ca 1919
maker
Dover
Place Made
United Kingdom: England, London, Charlton
Physical Description
metal (overall material)
Measurements
overall: 10 in; 25.4 cm
overall in case: 11 1/8 in x 8 3/4 in x 9 1/2 in; 28.2575 cm x 22.225 cm x 24.13 cm
ID Number
1983.0039.02
accession number
1983.0039
catalog number
1983.0039.02
Credit Line
Carnegie Institution of Washington
subject
Science & Scientific Instruments
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Science & Mathematics
Data Source
National Museum of American History
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