File:AmCyc Tunnel - Musconetcong cross section - no support.jpg
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AmCyc_Tunnel_-_Musconetcong_cross_section_-_no_support.jpg (546 × 436 pixels, file size: 64 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:10, 4 January 2013 | 546 × 436 (64 KB) | Bob Burkhardt | {{Information |Description={{en|Line drawing of a schematic cross section of Musconetcong tunnel in segments where the walls and ceiling require no support.}} |Source=''The American Cyclopædia'', v. 16, 1879, p. 32. |Date=1879 |Author=unknown artist; ... |
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