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      Knowledge is Power

      Scientific American January 28, 1871

      Our Eyes, and How to Take Care of them

      Condensed from an article by Henry W. Williams in the Atlantic Monthly.

      • January 28, 1871

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      More in the January 28, 1871 issue of Scientific American
      • Correspondence- January 28, 1871
      • Cast Iron Chimney
      • Improved Vertical Portable Engine, The Place of the Mitrailleur in War
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