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- Innovations: Pendulum Clock
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Illustration
This Dutch mathematician patented the first working pendulum clock in 1656 and later devised a watch regulator called a balance spring. These inventions changed timekeeping forever.
Artifact
This clock was made by Johannes van Ceulen around 1680.
Illustration
Italian astronomer Galileo Galilei competed for two longitude prizes in the 17th century.
Artifact
In 1642, for a Dutch longitude prize, Galileo proposed both an astronomical solution and an accurate sea clock—the first clock ever to have a pendulum.