Clocks are one of the oldest man-made devices to measure time and over the years clocks have undergone many changes in design and shape. The mechanical clocks came into existence during the fourteenth century and they were predominantly spring-operated. Thereafter, the clocks were in the form of pendulums and modern day quartz clocks are exquisitely made and widely used as an item of wall decor as well as a convenient gadget to know time.
02 Dec, 2011 --
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http://EzineArticles.com/6696034~
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