Credit: ©The Royal Society
    Image number: RS.15740

    Cockchafers, dragonflies, a common fly, the size of micro-organisms in comparison to a grain of sand

    Date
    12 November 1680
    Creator
    Antoni van Leeuwenhoek (1632 - 1723, Dutch) , Naturalist
    Object type
    Archive reference number
    Manuscript page number
    p21
    Material
    Dimensions
    height (page): 394mm
    width (page): 245mm
    Subject
    Description
    In a letter from Antoni van Leeuwenhoek to Robert Hooke. Figs 5 and 8 are possibly by Leeuwenhoek himself.

    Fig. 3: drawing of a male cockchafer, with the outline of a female specimen that was attached to the male.
    Fig 4: two dragonflies. The coloured one is the female, the outlined one the male.
    Fig. 5: sperm cell of a dragonfly.
    Fig. 6: a common fly.
    Fig. 8: a diagram to show the sheer smallness of the 'little animals' that Van Leeuwenhoek saw under his microscope. The circle ABCG represents the size of a grain of sand, D is one type of small animal which would fit 1728 times into a grain of sand. E and F are two smaller types of little animal that Van Leeuwenhoek could distinguish, which show the great number of little animals that occur within the size of a grain of sand.
    Object history
    The letter and images were also published in:

    Printed in Philosophical Collections, 3 (1681), pp. 51-58.

    Antoni van Leeuwenhoek, Ondervindingen en Beschouwingen der onsigtbare geschapenen waarheden, vervat in verscheydenen Brieven (Leiden: Daniel van Gaesbeeck, 1684), pp. 29-60.

    Also published in the Latin edition of Van Leeuwenhoek's letters: Antoni van Leeuwenhoek, Arcana Naturae Detecta (Delft: Krooneveld, 1695), pp. 6-27.
    Related fellows
    Antoni van Leeuwenhoek (1632 - 1723, Dutch) , Naturalist
    Robert Hooke (1635 - 1703, British) , Natural philosopher
    Martin Lister (1639 - 1712, British) , Physician
    Henry Oldenburg (1612 - 1677, German) , Scientific correspondent
    Robert Hooke (1635 - 1703, British) , Natural Philosopher
    Associated place
    <The World>
       > Europe
          > Netherlands
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