File:PSM V39 D762 Elevation of an open hearth furnace.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:50, 18 October 2015 | 1,512 × 631 (240 KB) | Ineuw | Cleaned image and improved contrast | |
21:54, 27 November 2010 | 1,527 × 639 (277 KB) | Ineuw | {{Information |Description = Elevation of an open hearth furnace |Source = http://en.wikisource.org /wiki/Page:Popular_Science_Monthly_Volume_39.djvu/762 |Date = 1891 |Author = Unknown |Permission = {{PD-old}} |other |