'Dutch lens grinders' diaporamas de présentation

The Microscope

The Microscope. Microscope History . 14 th Century. The art of grinding lenses is developed in Italy and spectacles are made to improve eyesight . . 1590 . Dutch lens grinders Hans and Zacharias Janssen make the first compound microscope by placing several lenses in a tube. . 1667 .

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History of the Microscope

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Cell Theory

Cell Theory. The work of Hans & Zacharia Janssen, Robert Hooke, Anton van Leeuwenhoek, Matthias Schleiden , Theodor Schwann, Rudolph Virchow and others led to the development of the Cell Theory. Hans & Zacharias Janssen 1590.

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