View Original: | Dip needle, by W. Wilson, 1 Belmont St., London, NW, for measuring vertical aspect of Earth's magnetic field, c. 1900 - Museum of Science and Industry (Chicago) - DSC06529.JPG (3551x4281) | |||
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Keywords: Dip needle, by W. Wilson, 1 Belmont St., London, NW, for measuring vertical aspect of Earth's magnetic field, c. 1900 - Museum of Science and Industry (Chicago) - DSC06529.JPG en Exhibit in the Museum of Science and Industry Chicago Illinois USA Photography was permitted in the museum without restriction 2014-08-22 11 17 29 own Daderot cc-zero Electromagnetic instruments in the Museum of Science and Industry Chicago Uploaded with UploadWizard Dip circles |