Credit: ©The Royal Society
    Image number: RS.17415

    Diagram

    Date
    14 December 1702
    Creator
    John Flamsteed (1646 - 1719, British) , Astronomer
    Object type
    Archive reference number
    Manuscript page number
    p1
    Material
    Dimensions
    height (page): 307mm
    width (page): 196mm
    Subject
    Description
    A figure in a letter from John Flamsteed to Abraham Sharp, dated 14 December 1702, with which Flamsteed poses the question: a point being given on a plane either with or without the convexity of any conical curve, find the longest and shortest line that can be drawn from the given point perpendicular to the said curve.

    Abraham Sharp (1653-1742) was Flamsteed's assistant in 1684, and also in 1688-91. From 1694, he ran a family estate at Little Horton, near Bradford (see Correspondence of Flamsteed, ed. by Forbes et al., vol. 3, p. 968).
    Object history
    MS/798 is a collection of letters by John Flamsteed and his wife, and by Mr Crosthwait, to Abraham Sharp between the years 1702 and 1730.
    Related fellows
    John Flamsteed (1646 - 1719, British) , Astronomer
    Associated place
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