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      Knowledge is Power

      Scientific American February 04, 1882

      Physical Society, London, November 12, 1881

      On Some Spirals Observed in Crystals, Illustrating the Relation of their Optic Axes

      • February 4, 1882

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      More in the February 04, 1882 issue of Scientific American
      • Amateur Mechanics
      • Central Institution for the City and Guilds of London Institute for the Advancement of Technical Education, South Kensington
      • How to make Permanent Magnets
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