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First Microscope
The first microscope to be developed was the optical microscope. Two eyeglass makers are the ones that made it. Hans Lippershey and Zacharias Janssen. -
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Ryan's Microscope and Cell Timeline
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Robert Hooke
Robert Hooke in 1665 was the first to look at a slice of cork with a microscope. He discovered small structures, which he called cells. -
Aton Van Leewenhoek
Van Leewenhoek is best known for his work on the improvement of the microscope. he was the first one tho observe living cells for the first time. -
Theodor Schwann
Schwann's many contrubutions to biology include the development of the cell theory. He viewed and stated that new plant cells formed from the nuclei of old plant cells. -
Matthias Schleiden
Schleiden, the botanist observed many different plants. He stated that the different parts of the plant organism are composed of cells. -
Cell Theory
In 1839, Schwann and Schleiden suggested that cells were the basic unit of life. In 1855, Rudolf Virchow concluded that all cells come from pre-existing cells, this completing the cell theory. -
Rudolf Virchow
Virchow's most widely known scientific contribution is his cell theory, which built on the work of Theodor Schwann. In 1855, Virchow stated that all cells come from pre existing cells. This completed the cell theory. -
Dmitri Mendeleev
Dmitri Mendeleev was a Russian chemist and inventor. He is known as being the creator of the first version of the periodic table of elements. Using the table, he predicted the properties of elements yet to be discovered. -
Wilhelm Röntgen
Wilhelm Röntgen was a German physicist, who, on November 8, 1895, produced and detected electromagnetic radiation in a wavelength range today known as X-rays. -
Electron Microscope
The first Transmission Electron Microscope was built by Max Knoll and Ernst Ruska in 1931. The first commercial Transmissionn Electron Microscope was built in 1939.
