Magnetometer
date: label: Date made
content: 1907
name: label: maker
content: Bausch, Lomb, Saegmuller Co.
notes: label: Description
content: The Department of Terrestrial Magnetism of the Carnegie Institution of Washington designed this theodolite magnetometer around 1904, combining the best features of the U.S. Coast and Geodetic Survey magnetometer and that used by the Magnetic Survey of India. This example is marked "BAUSCH, LOMB, SAEGMULLER CO. Rochester, N.Y. 4594" and "C.I. MAGNETOMETER NO. 4." It was made in 1907 and, with tripod, cost $620.50.
label: Description
content: Ref: J. A. Fleming, "Comparisons of Magnetic Observatory Standards by the Carnegie Institution of Washington," <i>Terrestrial Magnetism</i> 16 (1911): 61-84, on 62-63.
label: Description
content: Bausch, Lomb, Saegmuller Co., <i>Astronomical, Engineering and Other Instruments of Precision</i> (Rochester, N.Y., 1907), pp. 41-43.
label: Description
content: Carnegie Institution of Washington, <i>Land Magnetic Observations, 1905-1910</i> (Washington, D.C., 1912).
label: Location
content: Currently not on view
place: label: Place Made
content: United States: New York, Rochester
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: U.S. Department of Commerce, Coast & Geodetic Survey
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.316516
label: accession number
content: 225703
label: catalog number
content: 316516
objectType: label: Object Name
content: magnetometer
physicalDescription: label: Physical Description
content: metal (overall material)
label: Physical Description
content: wood (overall material)
label: Measurements
content: box: 25 in x 14 3/4 in x 8 in; 63.5 cm x 37.465 cm x 20.32 cm
label: Measurements
content: overall; box: 8 in x 25 1/8 in x 14 3/4 in; 20.32 cm x 63.8175 cm x 37.465 cm