Insect wings observed by van Leeuwenhoek, described in a letter of 1692. At right is a fly, the fly's wing and one of the fly's antennae. At left are the capillaries and membrane of the wing of an owlet moth (scales removed), with some of the scales also shown. Dutch scientist Antonie van Leeuwenhoek (1632-1723) built his own microscopes and 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 73 to the Royal Society (written 24 June 1692) and later published in 'Derde Vervolg' (1693). |