Magnetometer

Description:

Johann von Lamont, director of the astronomical and meteorological observatory at Bogenhausen, introduced this type of theodolite magnetometer in the 1840s. This example marked "Wm. Grunow, New York" belonged to the U.S. Military Academy at West Point and probably dates from the period 1873-1883. William Grunow was a native of Berlin who, together with his brother Julius, immigrated to the United States in 1849 and made microscopes in New York, New Haven, and again New York. When the partnership dissolved in the late 1860s, William began making instruments for physics research. He moved to West Point in 1883.

Ref: D. J. Warner, "Julius & William Grunow," Rittenhouse 3 (1989): 41-48.

Johann von Lamont, Handbuch des Erdmagnetismus (Berlin, 1849).

Date Made: 1873-1883

Maker: Grunow, William

Location: Currently not on view

Place Made: United States: New York

Subject: Science & Scientific InstrumentsScience & Scientific Instruments

Subject:

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

Exhibition:

Exhibition Location:

Credit Line: U.S. Department of Defense, U.S. Military Academy

Data Source: National Museum of American History

Id Number: PH.316428Accession Number: 223721Catalog Number: 316428

Object Name: magnetometer

Physical Description: metal (overall material)Measurements: horizontal circle: 11 in; 27.94 cmhorizontal scale: 36 in; 91.44 cmsuspension: 36 in; 91.44 cmoverall; long case: 6 in x 44 in x 10 5/8 in; 15.24 cm x 111.76 cm x 26.9875 cmoverall; large case: 18 1/2 in x 13 3/4 in x 14 1/4 in; 46.99 cm x 34.925 cm x 36.195 cm

Guid: http://n2t.net/ark:/65665/ng49ca746a8-f9b4-704b-e053-15f76fa0b4fa

Record Id: nmah_1029273

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