Credit: ©The Royal Society
    Image number: RS.15870

    Double-bottomed ship

    Date
    29 October 1662
    Creator
    Unknown, Artist
    After
    William Petty (1623 - 1687, British) , Natural philosopher
    Object type
    Archive reference number
    Manuscript page number
    p3
    Material
    Dimensions
    height (page): 326mm
    width (page): 210mm
    Subject
    Content object
    transport
       > boat
    Description
    Figure of a ship in the margin of a page, in a letter from William Petty to William Brouncker dated 29 October 1662.

    Petty's double-bottomed ship (catamaran) was called 'Simon and Jude' because it was launched on the feast day of Simon and Jude (28 October). It was later called 'Invention'. It had two 'cylinders', each two foot in diameter, with a mast 20 feet long. Several models had been made, including one to carry three men, before this version.

    There is a copy of this figure at EL/P1/15/002.
    Transcription
    When I left England, uppon my kissing his ma[jes]ties hand, I had the honour to bee told by his Ma[jes]tie that I should go into Ireland in my owne ship, that is, in a certaine fantasticall bottomelesse double bottom'd Machine uppon which I had formerly troubled his Ma[jes]tie thoughts or rather his Eares.
    Transcribed by the Making Visible project
    Object history
    At the meeting of the Royal Society on 19 November 1662, ‘Mr. Graunt to communicate an extract of Sir William Petty's letter concerning the new fashioned ship, together with a model of it, at the next meeting’ (Birch 1:126).

    On 26 November 1662, ‘Sir William Petty’s second letter to the lord viscount Brouncker was read, giving a farther account of his new ship; as also an extract of another letter of his to Mr. Graunt, who was desired to let Sir William know, that the society was well pleased with the invention’ (Birch 1:131).
    Related fellows
    William Brouncker, 2nd Viscount Brouncker of Lyons (1620 - 1684, British) , Mathematician
    William Petty (1623 - 1687, British) , Natural philosopher
    John Graunt (1620 - 1674, British) , Statistician
    Associated place
    <The World>
       > Europe
          > Ireland
    <The World>
       > Europe
          > United Kingdom
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