Magnetometer
date: label: Date made
content: ca 1895
name: label: maker
content: Fauth
label: maker
content: Fauth & Co.
notes: label: Description
content: This theodolite magnetometer is based on the design that the U.S. Coast and Geodetic Survey developed in 1892-1893. It is similar in many ways to the instrument that the Survey had been using since the early 1880s, but with several new features. One is the octagonal shape of the collimating magnets. Another is the black velvet screen that connects the telescope with the suspension box: this cuts off stray light and eliminates the problems that had been caused by the glass window in the earlier form. It is marked "FAUTH & CO. WASH<sup>N</sup> D.C. 941" and "T.M.C.I. 1." The serial number suggests that it was made around 1895.
label: Description
content: This instrument belonged to the Department of Terrestrial Magnetism of the Carnegie Institution of Washington. Internal records indicate that D.T.M. purchased it from Kolesch & Co. in New York in 1906 (for $175), sent it to Bausch, Lomb, Saegmuller Co. for repairs (another $120), and kept it in service until 1919.
label: Description
content: Ref: Edwin Smith, "Notes on Some Instruments Recently Made in the Instrument Division of the Coast and Geodetic Survey Office," <i>Annual Report of the Superintendent of the U.S. Coast and Geodetic Survey for 1894</i>, Appendix No. 8.
label: Location
content: Currently not on view
place: label: Place Made
content: United States: District of Columbia, Washington
topic: label: Subject
content: Science & Scientific Instruments
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: 1983.0039.04
label: accession number
content: 1983.0039
label: catalog number
content: 1983.0039.04
objectType: label: Object Name
content: magnetometer
physicalDescription: label: Physical Description
content: metal (overall material)
label: Measurements
content: overall: 34 1/2 in x 12 in x 20 in; 87.63 cm x 30.48 cm x 50.8 cm
label: Measurements
content: overall in case: 7 5/16 in x 26 1/8 in x 13 1/2 in; 18.57375 cm x 66.3575 cm x 34.29 cm