Lloyd-Creak Dip Circle
date: label: Date made
content: ca 1904
name: label: maker
content: Dover
notes: label: Description
content: The Department of Terrestrial Magnetism of the Carnegie Institution of Washington purchased this Lloyd-Creak circle in 1904. The inscription reads "Dover, Charlton Kent. Circle 169." With gimbal stand it cost $527. 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. An auxiliary needle on top is used to determine magnetic declination.
label: Description
content: Ref: Carnegie Institution of Washington. Department of Terrestrial Magnetism, <i>Land Magnetic Observations, 1905-1910</i> (Washington, D.C., 1912), p. 47.
label: Location
content: Currently not on view
place: label: Place Made
content: United Kingdom: England, London, Charlton
topic: label: Subject
content: Science & Scientific Instruments
setName: label: See more items in
content: Medicine and Science: Physical Sciences
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content: Science & Mathematics
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content: Measuring & Mapping
creditLine: label: Credit Line
content: Carnegie Institution of Washington
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1983.0039.01
label: accession number
content: 1983.0039
label: catalog number
content: 1983.0039.01
objectType: label: Object Name
content: dip circle
physicalDescription: label: Physical Description
content: metal (overall material)
label: Physical Description
content: wood (part material)
label: Measurements
content: vertical circle: 10 1/2 in; x 26.67 cm
label: Measurements
content: overall: 11 1/2 in x 9 1/2 in x 9 3/4 in; 29.21 cm x 24.13 cm x 24.765 cm