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Period: to
microscope and cells
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the first microscope
The first microscpe was invented in 1590 by two eyeglass makers, Hans Lippershey, and Zacharias Jansen. It had a total magnification of between 20x magnification and 30x magnification. -
Compound microscope
In 1609, Galileo Galilei created a compound microscope, using a convex lens to magnigfy, and a slightly concave lens to bring the image into focus, both placed in a brass tube. -
Robert Hooke
Robert Hook first discovered cells by looking at a slice of cork. -
Anton van Leeuwenhoek
Anton van Leeuwenhoek discovers both bacteria and the vacuole of the cell in this year. -
Red blood cells
In 1695, Anton van Leeuwenhoek discovered the red blood cell. when he first looked at them, he thought that they were unimportant. Laater, William Hewson decided that, because there were so many, they had to be important. -
Theodor Schwann
While dining with Schleiden, Schwann realized that plants and animals are both made of cell. Schleiden and Schwann quickly confirmed this, and Schwann m ade the statement that "All living things are composed of cells and cell products", which was soon made part of the cell theory. -
Matthias Jakob Shleiden
Matthias jakob Schleiden discovers and states that the different parts of the plant organism are composed of cells in 1838 -
Cell theory
The classical cell theory contains three statements: "all living things are made of cells and thier products", "Cells are the basic units of life", and "New cells are created by old cells dividing in two". The three scientists who contributed to the theory are: Matthias Schleiden, Theodor Schwann, and Rudolf Virchow. -
Rudolf Virchow
Rudolf Virchow was a German chemist, doctor and biologist. He worked with a man named Robert Remak for a time and eventually accepted Remak's theory. Virchow then plagiarized Remak's work, publishing it as his own. in doing so, he added to the cell theory that "every cell originates from another existing cell like it". He also worked with Schwann to prove it. -
the electron microscope
The electron microscope was originally invented and patented by Leo Szilard, who refused to make it, so in 1931, a German physicist Ernst Ruska and electrical engineer Max Knoll made a prototype capable ofd 400x magnification, and in 1933, the same men made another model capable o more than 2000x magnification. These days, electron microscopes can magnify up to 2000000x.
