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      Digital & 4-Year Archive

      Scientific American September 20, 1862

      Salts of Silver, Photography and Indelible Ink

      • September 20, 1862

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      More in the September 20, 1862 issue of Scientific American
      • Combined Sawing, Boring, Molding and Planing Machine
      • Paines's Spray Superheated Steam Engine
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