As a rule, Donald Saff doesn’t collect clocks he can’t see inside of. It’s the harmonic entanglement of gears—and the skill needed to craft them—that first lured him to horology, the study of ...

Pendulum clocks, a big advance over the hourglasses and sundials humans once peered at, remained the most precise timekeeping technology until the early 1900s. Based on Galileo’s discovery that ...

THE most accurate timekeepers of to - day are divided into two classes, depending on whether the restoring force of the oscillator is gravity, as in pendulum clocks, or elasticity, as in quartz ...

Comtoise watches, as seen here in the Comtoise Museum of master watchmaker Bernd Deckert, are a French pendulum clock from the French region of Franch-Comte. While they are beautiful antiques, they ...

MR. OVERTON has given us a most useful and interesting volume, describing the gradual evolution of timepieces from the early water clocks, through the balance clock, down to the modern pendulum clocks ...

Would you believe a pendulum clock that can keep time accurately to within one second per year? If you answered “yes”, you’ve either never tried to regulate a pendulum clock yourself, or you already ...