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      Scientific American June 11, 1887

      Correspondence - June 11, 1887

      An Improved Rheostat for Induced Currents

      • June 11, 1887

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      More in the June 11, 1887 issue of Scientific American
      • Amateur Mechanics
      • How to Graft Old Trees
      • Photographic Notes - June 4, 1887
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