Variometer

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Description
This instrument measures slight changes in the horizontal intensity of the earth's magnetic field. It is based on a design introduced by Hermann Ebert, a professor of physics in Munich, and Ebert tested it before it left Edelmann's shop. This example is marked "Physikalisch-mech. Institut. Von PROF. DR. TH. EDELMANN MÜNCHEN." The Department of Terrestrial Magnetism of the Carnegie Institution of Washington bought it for $94.69 in 1906.

Ref: M. Th. Edelmann, "On the Construction of Earth-Magnetic Instruments," Weather Bureau Bulletin 11 (1893): 511-539.

M. Th. Edelmann, Catalogue 26, item 300.

Location
Currently not on view
Date made
ca 1906
maker
Edelmann, Max Thomas
Place Made
Deutschland: Bayern, Munich
Physical Description
metal (overall material)
Measurements
overall: 42 in; 106.68 cm
ID Number
1983.0039.06
accession number
1983.0039
catalog number
1983.0039.06
Credit Line
Carnegie Institution of Washington
subject
Science & Scientific Instruments
Science & Scientific Instruments
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Science & Mathematics
Data Source
National Museum of American History, Kenneth E. Behring Center

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