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erecting prism
erecting prism

erecting prism

Date1900-1940
Inventory Number1998-1-0416g
ClassificationPrism
Subject
    Maker American
    Cultural Region
      Dimensions2 x 8.8 x 2 cm (13/16 x 3 7/16 x 13/16 in.)
      Material
        DescriptionPolyhedron of glass with a trapezoidal cross section. The oblique face is silvered and forms a right angle prism with the adjacent face. The adjacent face has a protective coating. The polished face at right angles to the former is removed at a distance of nearly 7 cm.
        Signedunsigned
        FunctionThis prism serves to erect an image and move it along the glass "pipe."
        2.25 x 2.4 inch, 45° prism in swing-away mount
        2.25 x 2.4 inch, 45° prism in swing-away mount
        American
        Date: 1875-1925
        Object number: 1997-1-1699
        5-sided deviating roof prism
        5-sided deviating roof prism
        French
        Date: 1900
        Object number: 1998-1-0412b
        2 arsenal prisms
        2 arsenal prisms
        American
        Date: 1900-1950
        Object number: 2007-1-0413
        60° liquid prism
        60° liquid prism
        American
        Date: circa 1875
        Object number: 2007-1-0405
        4 rectangular prisms
        4 rectangular prisms
        American
        Date: 1900-1950
        Object number: 2007-1-0412
        prisms (2)
        prisms (2)
        American
        Date: 1930 - 1970
        Object number: 2003-1-0148
        plano-convex cylindrical lens and concave cylindrical lens cut into a prism
        plano-convex cylindrical lens and concave cylindrical lens cut into a prism
        English
        Date: 1850-1875
        Object number: 1998-1-0401
        60° liquid prism
        60° liquid prism
        American
        Date: 1875-1900
        Object number: 1996-1-0693
        3.25 x 3.5 inch, half-prism
        3.25 x 3.5 inch, half-prism
        Alvan Clark and Sons
        Date: 1875-1900
        Object number: 1997-1-1690
        30°-60°-90° mounted prism
        30°-60°-90° mounted prism
        Jean Baptiste François Soleil
        Date: 1840-1875
        Object number: 1998-1-1210a
        30°-60°-90° mounted prism
        30°-60°-90° mounted prism
        Jean Baptiste François Soleil
        Date: 1840-1875
        Object number: 1998-1-1210b
        120° prism half-polished
        120° prism half-polished
        American
        Date: circa 1900
        Object number: 2007-1-0427