Credit: ©The Royal Society
    Image number: RS.15758

    Salt crystals in bezoar stone, dead coal, a pedro porco stone and coral

    Date
    6 July 1688
    Creator
    Unknown, Artist
    Object type
    Archive reference number
    Manuscript page number
    p15a
    Material
    Dimensions
    height (page): 59mm
    width (page): 72mm
    Subject
    Description
    Five figures in a letter from Antoni van Leeuwenhoek to the Royal Society. The original drawings are lost.

    Fig. A: salt in oil in which bezoar stone was rubbed
    Fig. B: salt in water in which bezoar stone had stood for a few hours
    Fig. D: crushed caput mortuum, or dead coal
    Fig. E: salt crystals from a pedro porco stone (a bezoar stone from a porcupine)
    Fig. F: salt from coral.
    Object history
    The letter with engraving is also printed in:

    Antoni van Leeuwenhoek, Natuurs verborgentheden ontdekt, zijnde een tweede vervolg der brieven (Delft: A. Voorstad, 1689), pp. 186-203.

    Antonio van Leeuwenhoek, Arcana naturae detecta (Delft: H. a Krooneveld, 1695), pp. 109-21.
    Related fellows
    Antoni van Leeuwenhoek (1632 - 1723, Dutch) , Naturalist
    Associated place
    <The World>
       > Europe
          > Netherlands
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