Microscopes and Cells

First Vision Aid

Jan 1, 1000

invented in 1000AD: (inventor unknown) fist vision aid was called a "reading stone." it was a glass sphere that magnified.

The First Microscope

Jan 1, 1590

invented by Hans and Zacharias Janssen

Robert Hooke

Sep 1, 1665

Discovered and named cells. He is also known as the Father of Microscopy.

Van Leewuenhoek

Jan 1, 1676

First person to see bacteria. Discovered single celled organisms, sperm, muscle striations, and protistsand bacteria
(Also known as the Father of Microbiology)

Matthais Schleiden

Jan 1, 1800

Concluded all plants have cells. (He was also the co-founder of the cell therory)

Cell Theory

Jan 1, 1838

General statement of Cell Theory recieved general acceptance.

Theodor Shwann

Jan 1, 1839

extended Schleiden's theory of "all plants are composed of cells" to "all living things are composed of cells."

Rudolf Virchow

Jan 1, 1879

founded two anthropological societies : suggested that all cells come from pre-existing cells and not all plants are made of cells that lead on to the invention of the Cell Theory.

slit-Ultramicroscope

Jan 1, 1903

Invented by Richard Zsigmondy. It can study objects below the wavelength of light.

Electron Microscope

Jan 1, 1931

invented my Max Knott and Ernst Ruska