-
Hans and Zacharias Janssen invented both the compound microscope and the refracting telescope
-
The first microscope could only be use for opaque objects and had a magnification of about 20x.
-
Robert Hooke uses a microscope with a 30X magnification to see and draw the first cell.
-
observed he said "little animals" or protozoa through a microscope
-
C. F. Wolff of Germany comes up with a generalized cell theory.
-
Achromatic lenses now provide 1/1000mm resolution.
-
Robert Brown discovers the nucleus of the cell
-
was the first to recognize that all plants, and all the different parts of plants, are composed of cells
-
Robert Remak discovers a method to isolate the membrane of the cell and proves that it divides a cell.
-
Ernst Leitz introduces is revoling mount for a microscope for 5 objects.
-
Lenses dipped in oil lead to homogeneeous optical path.
-
Walther Flemming discovers mitiosis.
-
August kohler had worked out a light source and condenser postion to obtain the best the best image.
-
Walther Fleming uses dyes to stain cells. Upon examination of these cells, he finds rods that he calls chromosomes.
-
Ernst Abbe brings red, yellow and blue into focus using 10 lenses.
-
Walter Sutton proves that egg and sperm cells only have one out of each set of chromosomes.
-
The resolution based on Abbe's the microscope has twice the visible light.
-
Fritz Zernike saw he could view unstained cells using the phase angle of rays.
-
Max Knoll and Ernst Ruska make the first electron microscope.
-
Ernst Ruska builds electron microscope that exceed the resolution of the light micoscope.
-
Zernike invented the phase contrast microscope
-
First electron micrograph of a biological sample.
