File:PSM V39 D638 Grinding telescope lenses.jpg
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DescriptionPSM V39 D638 Grinding telescope lenses.jpg | Grinding telescope lenses | |||||
Date | ||||||
Source | Popular Science Monthly Volume 39 | |||||
Author | Unknown authorUnknown author | |||||
Permission (Reusing this file) |
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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 39.djvu: ![]()
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current | 04:18, 13 October 2015 | ![]() | 2,012 × 1,679 (850 KB) | Ineuw (talk | contribs) | Cleaned image and improved contrast |
20:36, 27 November 2010 | ![]() | 2,019 × 1,659 (844 KB) | Ineuw (talk | contribs) | {{Information |Description = Grinding telescope lenses |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_39.djvu/638 |Date = 1891 |Author = Unknown |Permission = {{PD-old}} |other_versions = |
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