Page 22 - The Science of Glass
P. 22
Petri Dish
Julius Petri (YOO-lee-uhs PAY-tree) worked in a lab in Germany in
the late 1880s. While there, he designed the Petri (PEE-tree) dish. It is
a round, shallow dish with a cover. It is used to grow microorganisms,
such as bacteria. Petri dishes have clear lids. The lids protect the
contents from outside conditions. They also let scientists observe
materials with or without microscopes.
Biologist Dorothy Fennel
uses a microscope to view
specimens in Petri dishes
in the early 1940s.
Petri dish
20
