Lloyd-Creak Dip Circle

Description:

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.

Ref: Carnegie Institution of Washington. Department of Terrestrial Magnetism, Land Magnetic Observations, 1905-1910 (Washington, D.C., 1912), p. 47.

Date Made: ca 1904

Maker: Dover

Location: Currently not on view

Place Made: United Kingdom: England, London, Charlton

Subject: Science & Scientific Instruments

Subject:

See more items in: Medicine and Science: Physical Sciences, Science & Mathematics, Measuring & Mapping

Exhibition:

Exhibition Location:

Credit Line: Carnegie Institution of Washington

Data Source: National Museum of American History

Id Number: 1983.0039.01Accession Number: 1983.0039Catalog Number: 1983.0039.01

Object Name: dip circle

Physical Description: metal (overall material)wood (part material)Measurements: vertical circle: 10 1/2 in; x 26.67 cmoverall: 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

Guid: http://n2t.net/ark:/65665/ng49ca746a8-ca97-704b-e053-15f76fa0b4fa

Record Id: nmah_1029375

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