[Stephen Hobley] has been experimenting with an electromagnetic pendulum in order to build himself a clock. Through the course of his experiments, he has learned quite a bit about how pendulums ...

That big grandfather clock in the library might be an impressive piece of mechanical ingenuity, and an even better example of fine cabinetry, but we’d expect that the accuracy of a pendulum ...

Enhancing the display's mesmerizing allure is a brass Foucault pendulum hanging five stories — about 70 feet — down from the center of the clock, which swings based on Earth's rotation.