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      Scientific American December 19, 1885

      A Method of Measuring the Absolute Sensitiveness of Photographic Dry Plates

      • By William H. Pickering on December 19, 1885

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      More in the December 19, 1885 issue of Scientific American
      • Electricity in Warfare
      • Natural Gas Fuel and its Application to Manufacturing Purposes
      • Soldering and Repairing Platinum Vessels in the Laboratory
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