Magnetometer
name: label: maker
content: Fennel
notes: label: Description
content: This durable and portable instrument is marked "OTTO FENNEL SÖHNE CASSEL." It seems to be a Schmidt-type magnetometer with a massive copper damping plate to facilitate quick reading. Otto Fennel opened a shop in Cassel in 1851, after having served an apprenticeship with G. Breithaupt, and he showed instruments for land and mine surveying at the international exhibition in London in 1862 and at the Special Loan Collection of Scientific Apparatus in London in 1876. The firm was trading as Otto Fennel, Söhne in 1900. It is in business today as geo-Fennel. Scratched onto the base of this instrument is "zu 10540".
label: Location
content: Currently not on view
place: label: Place Made
content: Germany: Hesse, Cassel
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.316512
label: accession number
content: 225703
label: catalog number
content: 316512
objectType: label: Object Name
content: magnetometer
physicalDescription: label: Physical Description
content: metal (overall material)
label: Measurements
content: overall: 14 1/4 in; 36.195 cm
label: Measurements
content: overall; base: 6 7/16 in x 5 7/8 in x 5 1/2 in; 16.35125 cm x 14.9225 cm x 13.97 cm
label: Measurements
content: overall; attachment: 10 1/8 in x 4 5/8 in x 6 3/4 in; 25.7175 cm x 11.7475 cm x 17.145 cm