Zacharias and Hans Janssen invent the world's first compound microscope.
The word 'Cell' and Robert Hooke
Robert Hooke of England looks through a microscope at a sliver of cork. He is the first person to use the word cell to describe microscopic structures.
He also published the first ever copy of Micrographia.
Anton Van Leeuwenhoek
Anton Van Leeuwenhoek invented first convex lenses.
Anton Van Leeuwenhoek, of Holland, used microscopes to view many things including pond organisms, bacteria and blood cells. He made careful sketches of what he observed.
Joseph Jackson Lister
Joseph Jackson Lister developed an ‘achromatic’ lens which compensated for a distortion called ‘chromatic aberration’. This distortion happened because light of different wavelengths is diffracted through glass at different angles. With Lister's new lens, the coloured edge disappeared
Robert Brown discovers the nucleus of the cell. He stresses its importance in fertilization.
Matthias Schleiden and Theodor Schwann
Matthias Schleiden and Theodor Schwann create cell theory. The theory states that all living things are made up of one or more cells.
Schwann conducts experiments to help disprove spontaneous generation once and for all.
Oil Immersion Lenses
The first oil immersion lenses were made by Pro. Amici. According to Mayall they were designed to be used with oils having the same refraction as glass, homogeneous-immersion. This was to increase the resolution of a microscope.
Robert Remak discovers a method to isolate the membrane of the cell and proves that it divides a cell.
Rudolf Virchow writes and publishes his aphorism omnis cellula e cellula, which means every cell stems from another cell. He theorizes that all forms of disease come from changes in normal cells.
Rudolf Virchow heartily endorses cell division and the role it plays in pathology.
Joseph von Gerlach found that while experimenting with solutions of carmine and leaving a section of brain tissue in a dilute carmine solution overnight, gave good differential staining of the nucleus and nuclear granules compared with little or no staining of the cytoplasm and intercellular substance.
Ernst Ruska built the first electron microscope
Scanning Electron Microscope
Manfred von Ardenne invented the Scanning Electron Microscope