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  • Description: Curve
(8 results)



Display: 20

    • Railroads

    •  
    • A momentary burst of lights unequalled in the annals of photography turns night into day for this history making picture marking the centennial of the world famous Horseshoe Curve of the Pennsylvania Railroad, an engineering marvel to this day and...
    • Railroads

    •  
    • "A momentary burst of lights unequalled in the annals of photography turns night into day for this history making picture marking the centennial of the world famous Horseshoe Curve of the Pennsylvania Railroad, an engineering marvel to this day and...
    • Steel Plate

    • Steel; Factories;
    • Written on back: "The plate shown on the opposite side is one of the largest plates we have made - length and width considered. This plate was supplied against an order covering four plates in all - the material being ordered by the Phoenix Iron...
    • Steel Plate

    • Steel;
    • Written on back: "The plate shown on the opposite side is one of the largest plates we have made - length and width considered. This plate was supplied against an order covering four plates in all - the material being ordered by the Phoenix Iron...
    • Steel Plate

    • Steel;
    • Written on back: "The plate shown on the opposite side is one of the largest plates we have made - length and width considered. This plate was supplied against an order covering four plates in all - the material being ordered by the Phoenix Iron...
    • Lucite and light

    • Use of Lucite
    • An unusual property of Lucite acrylic resin is its ability to pipe light efficiently and with very little leakage around curves (radius of the curve must be at least twice the diameter of the thickness of the rod or sheet used). This ability is...

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