File:PSM V24 D835 Explanation of the law of conjugate foci.jpg
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![File:PSM V24 D835 Explanation of the law of conjugate foci.jpg](http://upload.wikimedia.org/wikipedia/commons/thumb/6/65/PSM_V24_D835_Explanation_of_the_law_of_conjugate_foci.jpg/800px-PSM_V24_D835_Explanation_of_the_law_of_conjugate_foci.jpg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 04:39, 1 September 2010 | ![]() | 1,821 × 610 (41 KB) | Ineuw | {{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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