File:AmCyc Tunnel - top and bottom heading driven - ready for arching (side view).jpg
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Size of this preview: 698 × 599 pixels. Other resolutions: 280 × 240 pixels | 559 × 480 pixels | 934 × 802 pixels.
Original file (934 × 802 pixels, file size: 280 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:31, 4 January 2013 | 934 × 802 (280 KB) | Bob Burkhardt | {{Information |Description={{en|Cross section of a tunnel, viewed from the side, in the process of being built, in this case ready for the installation of an arch.}} |Source=''The American Cyclopædia'', v. 16, 1879, p. 33. |Date=1879 |Author=unknown a... |
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