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      Knowledge is Power

      Scientific American March 22, 1884

      Sagnes' Machine for making Moulds for Objects in Copper and Bronze

      • March 22, 1884

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      More in the March 22, 1884 issue of Scientific American
      • Meinesz's Compressed Air Dredging Apparatus
      • Relief Printing Blocks from Photographs
      • The Dendrometer.—An Instrument for Measuring Heights of Trees
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