Photo-Recording Magnetometer

Description
This instrument was designed by J. Welsh at the Kew Observatory, made by Patrick Adie in London, and introduced in 1859. The U.S. Coast and Geodetic Survey acquired this example in 1861 but, owing to the Civil War and subsequent lack of funds, put it in storage. In 1882, in cooperation with the International Polar Commission, the Survey installed this instrument in a magnetic observatory at Los Angeles, California. The instrument was moved to San Antonio, Texas, in 1890, and later to Cheltenham, Maryland.

Ref: Balfour Stewart, "Account of the Construction of the Self-Recording Magnetographs at Present in Operation at the Kew Observatory of the British Association," Report of the British Association for the Advancement of Science (1859): 200-228.

C. A. Schott, "Results of the Observations Made at the U.S. Coast and Geodetic Survey Magnetic Observatory, at Los Angeles, California," Report of the Superintendent of the United States Coast and Geodetic Survey for the Year 1890, Appendix No. 8, p. 244.

C. A. Schott, "Results of the Observations Recorded at the U.S. Coast and Geodetic Survey Magnetic Observatory, at Los Angeles, California," Report of the Superintendent of the United States Coast and Geodetic Survey for the Year 1890, Appendix No. 9, p. 201.

Object Name
photo-recording magnetometer
maker
Adie, Patrick
Physical Description
metal (overall material)
place made
United Kingdom: England, London
ID Number
PH*316523
accession number
225703
catalog number
316523
subject
Measuring & Mapping
Science & Mathematics
Science & Scientific Instruments
Science & Scientific Instruments
See more items in
Medicine and Science: Physical Sciences
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
U.S. Department of Commerce, Coast & Geodetic Survey
Additional Media

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