The Foucault pendulum which was displayed for many years in the Smithsonian's National Museum of American History was removed in late 1998 to make room for the Star-Spangled Banner Preservation ...

It can balance an inverted pendulum that is articulated in the middle ... We do know that it was a seminar paper from a student at the University of Stuttgart but the rest is pretty much a mystery.

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 ...