Skip to main content
Advanced Search
6 1/8-inch objective prism
6 1/8-inch objective prism

6 1/8-inch objective prism

Date1900-1920
Inventory Number1996-1-0483a
ClassificationObjective Prism
Subject
    Maker Alvan Clark and Sons ? 1846 - 1958
    User Harvard College Observatory founded 1839
    Cultural Region
      Place of Origin
        Dimensions18 × 18 × 2.4 cm (7 1/16 × 7 1/16 × 15/16 in.)
        Material
          DescriptionThis objective prism has a clear aperture of 6 1/8 inches (15.6 cm) and is mounted in a brass cell by means of three metal brackets screwed to the cell rim. There is rouge still on the edges of the prism.
          Signedunsigned
          ProvenanceHarvard College Observatory, Agassiz Station; transfer to CHSI in 1969.
          Historical AttributesUsed by Harvard College Observatory and transferred from its Agassiz Station.
          7° objective prism
          7° objective prism
          Alvan Clark and Sons
          Date: circa 1900
          Object number: 1996-1-0481t
          7.5° objective prism
          7.5° objective prism
          Alvan Clark and Sons
          Date: circa 1900
          Object number: 1996-1-0481u
          5.5-inch objective lens
          5.5-inch objective lens
          Alvan Clark and Sons
          Date: circa 1900
          Object number: 1996-1-0481d
          24-inch Bruce doublet photographic telescope optics
          24-inch Bruce doublet photographic telescope optics
          Alvan Clark and Sons
          Date: 1890-1893
          Object number: 2016-1-0044
          8.25-inch objective lens for meridian circle
          8.25-inch objective lens for meridian circle
          Alvan Clark and Sons
          Date: 1867
          Accessories: wooden box; screws (3)
          Object number: HA0112e
          10-inch telescope objective with photographic correcting lens
          10-inch telescope objective with photographic correcting lens
          Alvan Clark and Sons
          Date: circa 1890
          Object number: 1996-1-0472
          6-inch telescope objective
          6-inch telescope objective
          Alvan Clark and Sons
          Date: 1890-1920
          Object number: 1997-1-0082
          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
          2.5-inch objective lens in oblique tube
          2.5-inch objective lens in oblique tube
          Alvan Clark and Sons
          Date: circa 1875
          Object number: 1996-1-0511
          6-inch refracting telescope
          6-inch refracting telescope
          Alvan Clark and Sons
          Date: 1910
          Accessories: shipping crate, terrestrial eyepiece, dust cap, mount and tripod (2003-1-0077b)
          Object number: 2003-1-0077a
          8-inch element for telescope objective
          8-inch element for telescope objective
          Alvan Clark and Sons
          Date: 1880-1890
          Object number: 1998-1-0456a
          2.5 x 2.5 inch, 31° carbonic disulphide liquid prism
          2.5 x 2.5 inch, 31° carbonic disulphide liquid prism
          Alvan Clark and Sons
          Date: circa 1875
          Object number: 2007-1-0029