Credit: ©The Royal Society
    Image number: RS.16475

    A plan of the subliming furnace or oven for making Sal Ammoniac in Egypt

    Date
    1760
    Creator
    Unknown, Artist
    Object type
    Archive reference number
    Manuscript page number
    p151
    Material
    Dimensions
    height (paper): 201mm
    width (paper): 170mm
    Subject
    Description
    Frederik Hasselqvist, Linnaeus's student,visited Egypt and reported that sal ammoniac was made there from the soot from the burnt dung of quardupeds. The Egyptians built 'an oblong oven, about as long again as broad, of brick and moist dung, of such a size, that the outside, or flat part of the top of the arch, may hold fifty glass vessels, ten in length and five in breadth, each vessel having a cavity left for it in the brick-work of the arch' ('The Method of Making Sal Ammoniac in Egypt', Philosophical Transactions of the Royal Society, vol. 51 (1760), p. 505).
    Transcription
    Tab XI p. 505
    Transcribed by the Making Visible project
    Object history
    Drawing for Frederik Hasselqvist, 'The Method of Making Sal Ammoniac in Egypt', Phil. Trans., vol. 51 (1760), pp. 504-06, tab. 11, communicated by Carl Linnaeus.
    Related fellows
    Carl Linnaeus (1707 - 1778, Swedish) , Botanist
    Associated place
    <The World>
       > Africa
          > Egypt
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