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      Knowledge is Power

      Scientific American April 25, 1914

      Table of Feet Reduced to Decimals of a Mile

      • By James G. Wishart on April 25, 1914

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      More in the April 25, 1914 issue of Scientific American
      • Machine Tools and the Motor Car Industry
      • The Decline of the American Navy
      • Blood Pigment and Chlorophyll
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