1. Evolution of Microscopes
Go to Section:

2. Slide # 2
Janssens
1590: Hans & Zacharias Janssen: invented compound light microscope
Go to Section:

3. A. Microscope Timeline (continued)
Slide # 3
A. Microscope Timeline (continued)
1667: Robert Hooke: studied cork; saw tiny, regular shaped “boxes”; called them cells.
Go to Section:

4. A. Microscope Timeline (continued)
Slide # 4
A. Microscope Timeline (continued)
1674: Anton van Leeuwenhoek: built single lens microscopes
drew pictures of what he saw.
Could magnify up to 270X
First to observe microorganisms
“Father of Microbiology”
Go to Section:

5. A. Microscope Timeline (continued)
Slide # 5
A. Microscope Timeline (continued)
1831: Robert Brown
Discovered nucleus in orchid cells
Go to Section:

6. A. Microscope Timeline (continued)
Slide # 6
A. Microscope Timeline (continued)
1838: Matthais Schleiden:
All plants are made of cells
Go to Section:

7. A. Microscope Timeline (continued)
Slide # 7
A. Microscope Timeline (continued)
1839: Theodor Schwann:
All animals are made of cells
Cell is the basic unit of function
Go to Section:

8. A. Microscope Timeline (continued)
Slide # 8
A. Microscope Timeline (continued)
1855: Rudolf Virchow:
Hypothesized that new cells are formed only from preexisting cells
Bacterial cell producing a new bacterial cell.
Go to Section:

9. TAKS PRATICE
Using this tool, Anton van Leeuwenhoek was the first scientist to —
A use a telescope
B see microscopic organisms
C magnify plants
D observe light waves