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Dutch scientists Hans and Zacharias Janssen make the first microscope by placing two lenses in a tube
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Robert Hooke studies lots of object with his microscope and publishes his results in Micrographia.
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Anton van Leeuwenhoek uses a simple microscope with only one lens to look at blood, insects and many other objects. He was the first person to describe cells and bacteria, seen through his small microscopes.
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Several technicians make microscopes better and easier to handle.
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Joseph Jackson Lister got rid of some problem with the microscopes by showing that multiple weak lenses used together at certain distances gave good magnification.
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Abbes formula make calculations of maximum resolution in microscopes possible.
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Gerd Binnig and Heinrich Rohrer invented a microscope that gives three-dimensional images.
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Richard Zsigmondy develops the ultramicroscope.
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Frits Zernike invented the phase-contrast microscope.
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Ernst Ruska develops the electron microscope. The ability to use electrons in microscopy greatly improves the resolution and greatly expands the borders of exploration.
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