File:PSM V39 D763 Vertical cross section of an open hearth furnace.jpg

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Description Vertical cross section of an open hearth furnace
Date
Source http://en.wikisource.org /wiki/Page:Popular_Science_Monthly_Volume_39.djvu/763
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
current19:54, 18 October 2015Thumbnail for version as of 19:54, 18 October 20151,077 × 907 (182 KB)IneuwCleaned image and improved contrast
21:55, 27 November 2010Thumbnail for version as of 21:55, 27 November 20101,123 × 923 (264 KB)Ineuw{{Information |Description = Vertical cross section of an open hearth furnace |Source = http://en.wikisource.org /wiki/Page:Popular_Science_Monthly_Volume_39.djvu/763 |Date = 1891 |Author = Unknown |Permission = {{PD-
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