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Scientific American, Vol. 39, No. 1 (1878) (1878)
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ng them out, way of surmounting obstacles of this sort is to make the wheel revolves rapidly, and if undisturbed will remain in |for cutting off and pulling up broken tubes, and a mechan- balls ricochet or bounce over the parapet after first striking the position in which it was started. If… … © 1878 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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