Cell and Microscope Discovery Timeline
Create a timeline that includes 15 events that depict cell and microscope history and
development. Use information from your notes to create the timeline. The timeline must
demonstrate understanding of timeline spacing. Each event must include a date, scientist and
brief account of the discovery or improvement. The timeline will be graded using the scoring
guide on the back of this sheet.
1590 Hans and Zacharias Janssen
developed compound microscope
1665
looked at cork, gave name of “cells”
1674
*improvements to microscope lenses for better
magnification
1676
*identified animalcules (protists) in pond water
1683
*identified animalcules (bacteria)…
1833 Robert Brown
Identified nuclei in plant cells
1835 Felix Dujardin
Identified “jelly-like” substance in cells...cytoplasm
1838
Discovered plant parts are made of cells
1839
Discovered animals made of cells
1857 Rudolf Kolliker
Discovered mitochondria in muscles
1858
Stated that “cells come from other cells”
1872 Camillo Golgi
Developed silver nitrate staining
1873 Anton Schneider
Described chromosomes
1882 Hans Christian Gram
Devised “Gram” staining technique
1932 Richard Zernike
Develops Phase Contrast Microscope
Able to study colorless, transparent bio-materials
1938 Ernest Rusha & Max Knoll
Develops the Electron Microscope
Allows better resolution and detail
1965 Charles Oatley
Manfred von Ardenne
Electron Scanning Microscope
Able to produce highly magnified three dimensional
images
1981 Gerd Binnig and Heinrich Rohrer
Invents the Scanning Tunneling Microscope
Produces three-dimensional images of objects
down to the atomic level