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Description Explanation of the law of conjugate foci
Date between 1883 and 1884
date QS:P,+1883-00-00T00:00:00Z/8,P1319,+1883-00-00T00:00:00Z/9,P1326,+1884-00-00T00:00:00Z/9
Source Popular Science Monthly Volume 24
Author Unknown authorUnknown author
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current04:39, 1 September 2010Thumbnail for version as of 04:39, 1 September 20101,821 × 610 (41 KB)Ineuw (talk | contribs){{Information |Description = Explanation of the law of conjugate foci |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_24.djvu/835 |Date = 1883-1884 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [[Categ

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