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Scientific American, Vol. 74, No. 4 (1896) (1896)
leaf 7
the tunnel was driven through the London The use of the antiquated jack screws was abandoned, elay for its whole length, no water had to be dealt the idea of operating the same for excavating the hydraulic power being substituted as a means for en- with and no difficulties were encountered.” small… … © 1896 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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