File:PSM V23 D103 Parabolic mirror c d for focus.jpg
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DescriptionPSM V23 D103 Parabolic mirror c d for focus.jpg | Parabolic mirror at C-D for focus | |||||
Date | ||||||
Source | Popular Science Monthly Volume 23 | |||||
Author | Unknown authorUnknown author | |||||
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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Extracted image from book, to greyscale, cropped whitespace. The original can be viewed here: Popular Science Monthly Volume 23.djvu: . Modifications made by Ineuw.
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current | 17:39, 29 November 2010 | 918 × 517 (20 KB) | Ineuw (talk | contribs) | {{Information |Description = Parabolic mirror at C-D for focus |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_23.djvu/103 |Date = 1883 |Author = Unknown |Permission = {{PD-old}} |other_v |
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