File:PSM V47 D479 Test pattern to determine astimatism.jpg
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DescriptionPSM V47 D479 Test pattern to determine astimatism.jpg | Test pattern to determine astimatism | |||||
Date | ||||||
Source | Popular Science Monthly Volume 47 | |||||
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 grayscale, cropped whitespace. Modifications made by Ineuw. The original can be found here: Popular Science Monthly Volume 47.
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current | 07:54, 8 March 2011 | ![]() | 916 × 986 (148 KB) | Ineuw (talk | contribs) | {{Information |Description = Test pattern to determine astimatism |Source = [http://www.archive.org/details/popularsciencemo47newy Popular Science Monthly Volume 47] |Date = 1895 |Author = Unknown |Permission = {{PD-o |
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