Clocks and Watches
5 links
Cesium Atomic Clocks
tycho.usno.navy.mil
Kinds of cesium clocks, with pictures, plus a description of their operation and the science behind them.
How Stuff Works: Atomic Clock
howstuffworks.com
Concise history, background, definitions and operational information regarding atomic clocks.
How Stuff Works: Pendulum Clock
howstuffworks.com
Concise description using drawings and animation to show the operation of a pendulum clock.
Smithsonian Institute - On Time
americanhistory.si.edu
History of the clock and how Americans have measured time and been affected by it.
Showing 20–5 of 5 results