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      Knowledge is Power

      Scientific American November 24, 1906

      Gelatino Chloride Emulsion for Gaslight Developing Paper

      • By A. J. Jarman on November 24, 1906

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      More in the November 24, 1906 issue of Scientific American
      • Air in Relation to the Surface-Condensation of Low-Pressure Steam: An Experimental Study of Condenser Problems
      • Incandescent Lamps and the Grading of Voltages
      • An Experience in Oiling a City Street
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