 |
Encyclopediaclockclock, instrument for measuring and indicating time. Predecessors of the clock were the sundial, the hourglass, and the clepsydra. See also watch. Sections in this article: The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved. More on clock from Infoplease:
- Clocks - Clocks Sundials Water Clocks Accurate Mechanical Clocks Information Please® Database, © ...
- Clocks - Clocks Sundials Water Clocks Accurate Mechanical Clocks Information Please® Database, © ...
- atomic clock - atomic clock atomic clock, electric or electronic timekeeping device that is controlled by atomic ...
- Daylight Saving Time - Starting in 2007, "daylight time" will be observed from the second Sunday in March to the first Sunday in November, adding about a month to the current daylight saving time (the first Sunday in April to the last Sunday in October).
- Quartz Clocks - Quartz Clocks The Shortt clock was replaced as the standard by quartz crystal clocks in the 1930s ...
|
|
