File:PSM V39 D638 Grinding telescope lenses.jpg

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Description Grinding telescope lenses
Date
Source Popular Science Monthly Volume 39
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 39.djvu: . Modifications made by Ineuw.

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Date/TimeThumbnailDimensionsUserComment
current04:18, 13 October 2015Thumbnail for version as of 04:18, 13 October 20152,012 × 1,679 (850 KB)IneuwCleaned image and improved contrast
20:36, 27 November 2010Thumbnail for version as of 20:36, 27 November 20102,019 × 1,659 (844 KB)Ineuw{{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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