Precision time is ubiquitous today thanks to GPS and WWVB. Even your Macbook or smartphone displays time which is synchronized to the NIST-F1 clock, a cesium fountain atomic clock (aka the ‘Atomic ...

4. The Altgeld Library Grandfather Clock: The Altgeld Library Grandfather Clock was made by the Self-Winding Clock Company of New York in the 1890s. Before the Master Clock took over, the Altgeld ...