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 ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. overall: 6 3/4 in x 4 3/8 in x 3 1/2 ...

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 ...

A new clock -- well, an old clock, really -- has been installed on the lower level of Manhattan's Grand Central Terminal. Metro-North Railroad spokeswoman Marjorie Anders says the clock was moved from ...