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Scientific American, Vol. 46, No. 5 (1882) (1882)
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no longer be taken by sur- carries a cribwork forty. prise in any difficulty.” four feet high, heavily At the bottom of our illustration is a sectional weighted with brick to drawing of the river and its bed, showing the counteract the air pressure line of the tunnel and the progress made; also in… … © 1882 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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