biolody

The article:
In 1665,Robert Hooke made an observation with a microscope designed by himself.He took a good clear piece of cork,and cut a piece of it off.Then he examined it with his microscope and observed that there were little holes on it.To make the observation clearer,he focused the light on the specimen with a plano-convex glass.This time the holes appeared like a honey-comb,but that the holes were not regular.It was how the fast microscopic cell discovered.