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Scientific American, Vol. 27, No. 15 (1872) (1872)
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ated, ‘three day, instead of two hundred, from five to ten thousand dol- position and thus thé operation continues until the entire rows at a time. Upon the first row.and at right angtes to it, length of the basin on both its sides is excavated, when all lars. a track.is laid, consisting of heavy… … © 1872 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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