Pendulums for time

First inkling that pendulums might have good time-keeping properties. Most time keeping done via heart rate, dripping water, burning candle, Took another 70 years to implement.
 Galileo Galilei Italy 1581 Pendulums for time

First inkling that pendulums might have good time-keeping properties. Most time keeping done via heart rate, dripping water, burning candle, Took another 70 years to implement.