Van Leeuwenhoek's microscopy equipment, 1689

Bildnummer 12642842
Van Leeuwenhoek's microscopy equipment, 1689
Van Leeuwenhoek's microscopy equipment, described in a letter of 1689. Dutch scientist Antonie van Leeuwenhoek (1632-1723) built his own microscopes, including designs such as this 'eel spy glass', used to examine blood circulation in the tails of small eels (eel shown at centre right). Eel tail capillaries are at top left, with fish arteries and veins at far right. Van Leeuwenhoek was able to study the natural world in greater detail than was previously possible. His observations included protozoa, bacteria, insects, plants, minerals, blood cells, and sperm. His earliest observations were published in 1673, and over the next 50 years he self-published and wrote hundreds of letters to scientists and learned societies detailing his discoveries. This page is from Letter 66 to the Royal Society (written 12 January 1689) and later published in 'Tweede Vervolg' (1689).
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Credit: Science Photo Library / Library of Congress, Rare Book and Special Collections Division
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