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      Scientific American May 09, 1914

      New Stamp Printing Machine of the Bureau of Engraving and Printing, An Underground Canal, and more

      • May 9, 1914

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      More in the May 09, 1914 issue of Scientific American
      • An Innovation in Ship Salvage, Dried Yeast as a Cattle Food, and more
      • Correspondence- May 9, 1914
      • Notes and Queries- May 9, 1914
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