August 27, 1723 (July 27), mao, the Dutch biologist Levine Hooke's death. In In 1723, the Dutch biologist Leeuwenhoek's death.


Anton Levin Hooke (1632 to 1723), the Dutch microscopist and naturalist. Born in Delft. The self-taught. When too apprentice, opened the grocery store, worked as the janitor of the City Hall. His greatest contribution is the use of home-made microscope found in the microbial world (then called the tiny animals), his microscope magnification of 50 to 300 times, a simple structure, only one lens installed in the middle of the two metal flakes in lens in front of a metal rod, the rod tip resting on the need to observe the sample, by focusing screw to adjust the focus. Using this microscope, Anton van Leeuwenhoek clearly see bacteria and protozoa. The first to reveal a new biological world - microbial sector. Because of his epoch-making contribution in 1680 was elected a member of the Royal Society. He loves making magnifying glass and microscope, life has produced more than 400 microscopes and magnifying glass (history www.lssdjt.com) he bequeathed to the Royal Society a cupboard, within 26 instrument and some lens, the book is entitled Proceedings of the mysteries of nature, "(1695 to 1719). 1688 was observed with a microscope tadpole tail found microvascular blood circulation theory confirmed Harvey and Malpighi. 1675 found protozoa and sperm; discovered bacteria in 1681, laid the foundation for microbiology and medicine. In 1723, the 91-year-old Leeuwenhoek in his last moments, to produce their own part of the microscope, magnifying glass, as well as a sophisticated instrument production tips, presented to the Royal Society.