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