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Zacharias Janssen produced the first compound microscope by combining two convex lenses within a tube
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Dutch, Anton Van Leeuwenhoek, learned to grind lenses and assemble them into microscopes. Thus creating the ability to veiw microscopic images of cells. http://science.howstuffworks.com/
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Robert Hooke used microscopes to observe cork cells. The scetches were published as Micrographia. This inspired Leeuwenhoek to build microscope extensions. http://science.howstuffworks.com/
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Anton van Leeuwenhoek improved magnification of microscopes by polishing lenses
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Antoni van Leeuwenhook reported that he had observed "little animals" through a microscope.
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Anton van Leeuwenhoek discovered bacteria from a sample of saliva from his mouth
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Lorenz Oken made a statement that all organic beings originate from and consist of vesicles or cells.
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Robert Brown contributed to the determination of how the cell nucleus looked like and how the cytoplasm function
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Matthias Schleiden discovered the plants were made up of cells
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Theodor Shwann came up with the first statement of the cell theory stating all living things are made of cells
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Louis Pasteur discovered that cells come only from other cells
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Rudolf Virchow proposed that all living cells must rise from pre-existing cells
