id author title date pages extension mime words sentences flesch summary cache txt en-wikipedia-org-3198 Antonie van Leeuwenhoek - Wikipedia .html text/html 7221 1126 59 A largely self-taught man in science, he is commonly known as "the Father of Microbiology", and one of the first microscopists and microbiologists.[6][7] Van Leeuwenhoek is best known for his pioneering work in microscopy and for his contributions toward the establishment of microbiology as a scientific discipline. Using single-lensed microscopes of his own design, van Leeuwenhoek was the first to experiment with microbes, which he originally referred to as dierkens, diertgens or diertjes (Dutch for "small animals" [translated into English as animalcules, from Latin animalculum = "tiny animal"]).[8] Through his experiments, he was the first to relatively determine their size. After developing his method for creating powerful lenses and applying them to the study of the microscopic world,[17] van Leeuwenhoek introduced his work to his friend, the prominent Dutch physician Reinier de Graaf. By the end of his life, van Leeuwenhoek had written approximately 560 letters to the Royal Society and other scientific institutions concerning his observations and discoveries. Van Leeuwenhoek's microscopic discovery of microbial life ./cache/en-wikipedia-org-3198.html ./txt/en-wikipedia-org-3198.txt