'Dutch lens grinders' presentation slideshows

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 .

590 views • 22 slides

History of the Microscope

406 views • 19 slides

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.

345 views • 8 slides