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      Knowledge is Power

      Scientific American January 05, 1907

      An Interesting Process for Avoiding Sponginess in Heavy Steel Castings

      • By L. Ramakers on January 5, 1907

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      More in the January 05, 1907 issue of Scientific American
      • Recently Patented Inventions
      • A Church Blown up by Natural Gas.
      • Hand-Operated Shaper
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