Looking for a special gift? Buy a print of this image.

    Mirror cell for the Great Melbourne Telescope speculum

    Date
    ca. 1867
    Object type
    Archive reference number
    Material
    Technique
    Dimensions
    height (print): 90mm
    width (print): 76mm
    Subject
    Content object
    Description
    Study of the system of “equilibrated levers” made by Thomas Grubb (1800-1878), devised for the Armagh Cassegrain telescope and applied to the Great Melbourne Telescope’s twin speculum mirrors.
    Object history
    This image of Grubb’s design was reproduced as a lithograph in Correspondence concerning the Great Melbourne Telescope. In three parts: 1852-1870 (London, Royal Society, 1871), plate III figure 13 and described in Thomas Romney Robinson’s “Abstract” description of the telescope, part III, pp.49-59.8 with a key to the print.
    Associated place
    <The World>
       > Europe
          > Ireland
    <The World>
       > Oceania
          > Australia
    Credit
    © The Royal Society
    Image number
    RS.9291
    Powered by CollectionsIndex+/CollectionsOnline