File:PSM V23 D103 Parabolic mirror c d for focus.jpg
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Size of this preview: 800 × 451 pixels. Other resolutions: 320 × 180 pixels | 640 × 360 pixels | 918 × 517 pixels.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:39, 29 November 2010 | 918 × 517 (20 KB) | Ineuw | {{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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