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.

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

Visitor Comments

Add a comment about this object

**Please read before submitting the form**

Have a comment or question about this object to share with the community? Please use the form below. Selected comments will appear on this page and may receive a museum response (but we can't promise). Please note that we generally cannot answer questions about the history, rarity, or value of your personal artifacts.

Have a question about anything else, or would you prefer a personal response? Please visit our FAQ or contact page.

Personal information will not be shared or result in unsolicited e-mail. See our privacy policy.

Enter the characters shown in the image.