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      Scientific American September 09, 1916

      A Difficult Piece in Subaqueous Rock Excavation

      • By Robert G. Skerrett on September 9, 1916

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      More in the September 09, 1916 issue of Scientific American
      • Large Telescope Built by Students, What the Telephone Means to the Fighting Men of Europe
      • Auto Repair Trucks for Field Service
      • Clearing of Fog by Electrical Precipitation
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