File:PSM V38 D609 Grooves in rolls for rolling railroad rails 1850.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 18:59, 19 October 2011 | 2,460 × 1,512 (1.63 MB) | Ineuw | {{Information |Description = Grooves in rolls for rolling railroad rails 1850 |Source = [http://www.archive.org/details/popularsciencemo38newy Popular Science Monthly Volume 38] |Date = 1890-1891 |Author = {{unknown|Author | |
01:17, 25 October 2010 | 2,446 × 1,509 (1.51 MB) | Ineuw | {{Information |Description = Grooves in rolls for rolling railroad rails 1850 |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_38.djvu/609 |Date = 1890-1891 |Author = Unknown |Permission = { |