Clock. The clock is one of the oldest human inventions, meeting the need to consistently measure intervals of time shorter than the natural units: the day, the lunar month, and the year. Devices operating on several physical processes have been used over the millennia. A sundial shows the time by displaying the position of a shadow on a flat surface. There are a range of duration timers, a well-known example being the hourglass. Water clocks, along with the sundials, are possibly the oldest time-measuring instruments. A major advance occurred in Europe around 1300 with the invention of the escapement, which allowed construction of the first mechanical clocks, which used oscillating timekeepers like balance wheels.[3][4][5][6] Spring-driven clocks appeared during the 15th century. During the 15th and 16th centuries, clockmaking flourished. The study of timekeeping is known as horology. History[edit] Time-measuring devices[edit] Sundials[edit] Simple horizontal sundial Water clocks[edit]
Amazing Word Clock. Aspiral Clocks. Here comes the revolutionary concept Aspiral Clocks designed by Will Aspinall and Neil Lambeth. How does it work? The clock face ever so slowly spirals over the course of twelve hours, moving a rolling ball precisely around, telling the time as it goes. Brilliant! By the way, for all sorts of wonderful… free printable calendar templates.
HELVETICTOC. KeepMeOut. THIS DAY. Time Zone Converter - Time & Time Zone Conversion. What Time Is It.