Q: My husband and I purchased a beautiful Howard Miller pendulum wall clock in 1994. It worked well until a few months ago, when it began adding two chimes, one at five minutes before the hour and ...

In the 17th century, Christiaan Huygens, inventor of the pendulum clock, noticed a curious phenomenon. When two identical pendulum clocks are mounted next to each other on a wall, their swings ...

After 350 years two Portuguese researchers believe that pendulum clocks eventually swing together because of sound pulses that travel through the wall from clock to clock.

University Of Lisbon Scientists Solve Pendulum Clock Mystery Two professors at the University of Lisbon say they have discovered why the pendulums of clocks set on the same surface will eventually ...

An eerie link between two 17th-century clocks has finally been explained, say scientists who have retraced the work of Dutch genius Christiaan Huygens. Huygens invented the pendulum clock in 1657 ...

See memorable items appraised in 2000, and a jump in value from $15-20,000 to $35-45,000.