 | 1867 - 400 頁
...feet, and the clear height five feet two inches, the top and bottom arches being semi-circles. It is lined with brick masonry eight inches thick, in two rings or shells, the bricks being laid lengthwise of the tunnel, with toothing joints. The bottom of the inside surface of the... | |
 | 1867 - 400 頁
...feet, and the clear height five feet two inches, the top and bottom arches being semi-circles. It is lined with brick masonry eight inches thick, in two rings or shells, the bricks being laid lengthwise of the tunnel, with toothing joints. The bottom of the inside surface of the... | |
 | 1867 - 498 頁
...and the height five feet and two inches; the bottom and the top arches being exact semicircles. It is lined with brick masonry eight inches thick in two rings or shells ; the bricks being laid lengthwise of the tunnel, with toothing joints. It had been contemplated by the contractors... | |
 | United States. Commissioners to the Paris Universal Exposition, 1867 - 1870 - 554 頁
...lowest section was turned, the castings proving sufficiently smooth for the others without turning. eight inches thick, in two rings or shells, the bricks...are to be like those described for the land shaft. The excavation for the tunnel, when through sufficiently firm clay, shall conform exactly to the outside... | |
 | WILLIAM P. BLAKE - 1870 - 50 頁
...lowest section was turned, the castings proving sufficiently smooth for the others without turning. eight inches thick, in two rings or shells, the bricks...are to be like those described for the land shaft. The excavation for the tunnel, when through sufficiently firm clay, shall conform exactly to the outside... | |
 | Elias Colbert, Everett Chamberlin - 1872 - 570 頁
...and the inside height five feet and two inches, the top and bottom arches being semicircles. It is lined with brick masonry eight inches thick, in two rings or shells, the bricks being laid lengthwise of the tunnel, with toothing joints. The bottom of the inside surface of the... | |
 | Rufus Blanchard - 1881 - 812 頁
...and the clear height, five feet and two inches, the top and bottom arches being semi-circles. It is lined with brick masonry eight inches thick, in two rings or shells, the brick being laid lengthwise of the tunnel, with toothing joints. The bottom of the inside surface of... | |
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The excavation for the tunnel, when through sufficiently firm clay, shall conform exactly to the outside of the masonry on the bottom and sides. On top, just enough of excavation above the masonry will be allowed, to give room to turn and key the upper... 