File:PSM V34 D307 Variability of the earth magnetic force.jpg

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Description Variability of the earth magnetic force
Date between 1888 and 1889
date QS:P,+1888-00-00T00:00:00Z/8,P1319,+1888-00-00T00:00:00Z/9,P1326,+1889-00-00T00:00:00Z/9
Source Popular Science Monthly Volume 34
Author Unknown authorUnknown author
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current19:46, 6 September 2011Thumbnail for version as of 19:46, 6 September 20111,684 × 1,459 (152 KB)Ineuw{{Information |Description = Variability of the earth magnetic force |Source = [http://www.archive.org/details/popularsciencemo34newy Popular Science Monthly Volume 34] |Date = 1888-1889 |Author = {{unknown|Author}} |Permission = {{PD-old}} |other_v
22:19, 4 October 2010Thumbnail for version as of 22:19, 4 October 20101,684 × 1,459 (139 KB)Ineuw{{Information |Description = Variability of the earth magnetic force |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_34.djvu/307 |Date = 1888-1889 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [[Catego

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