Universal Magnetometer with Dip Circle


Universal magnetometer marked "D.T.M. C.I.W. N° 19." Designed and built by the Department of Terrestrial Magnetism of the Carnegie Institution of Washington in 1912, it incorporates an astronomical telescope and magnetometer for the determination of magnetic declination and horizontal intensity, and a dip circle with a Lloyd-Creak attachment for the determination of inclination and intensity. It is relatively light and easy to manipulate. It was used for a few years and then set aside when the universal magnetometer with earth inductor came into use.

This magnetometer was probably transferred to the U.S. Coast and Geodetic Survey after the Carnegie Institution closed its geomagnetic program. The U.S. Geological Survey acquired it in 1973, when it took over the geomagnetic program of the federal government, and transferred it to the Smithsonian in 1982.

Ref: J. A. Fleming, "Two New Types of Magnetometers Made by the Department of Terrestrial Magnetism of the Carnegie Institution of Washington," Terrestrial Magnetism 16 (1911): 1-12.

Carnegie Institution of Washington, Land Magnetic Observations, 1911-1913 (Washington, D.C., 1915), pp. 7-8.

Date Made: 1912

Maker: Carnegie Institution of Washington. Department of Terrestrial Magnetism

Location: Currently not on view

Place Made: United States: District of Columbia, Washington

Subject: Science & Scientific Instruments


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


Exhibition Location:

Credit Line: U.S. Department of Interior, U.S. Geological Survey

Data Source: National Museum of American History

Id Number: 1982.0671.03Accession Number: 1982.0671Catalog Number: 1982.0671.03

Object Name: magnetometer

Physical Description: metal (overall material)wood (part material)Measurements: overall: 11 3/4 in x 8 1/2 in x 18 in; 29.845 cm x 21.59 cm x 45.72 cmoverall: 10 1/2 in x 2 1/4 in x 11 1/4 in; 26.67 cm x 5.715 cm x 28.575 cm

Guid: http://n2t.net/ark:/65665/ng49ca746a8-d8e8-704b-e053-15f76fa0b4fa

Record Id: nmah_1029289

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