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      Scientific American February 12, 1916

      A High Efficiency Incandescent Lamp

      Steps in its Development, and Principales of Operation

      • February 12, 1916

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      More in the February 12, 1916 issue of Scientific American
      • A Correction
      • Acres of Tracing Cloth and Hogsheads of Ink
      • Induced Electromotive Force
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