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Grandfather Clocks Blog
Everything You Want or Need to Know About Grandfather Clocks ... Subscribe by Email to Grandfather Clocks Blog: © 2007 1-800-4clocks.com. All Rights Reserved. ...www.grandfatherclocksblog.com/Clocks Blog
People buy cuckoo clocks for decorating purposes ... July 15th, 2008 | Posted in Clocks Blog | No Comments ... Copyright © Clocks Blog - Powered by WordPress ...clocksblog.info/Alarm Clock Blog
The Alarm Clock Blog: the creators of the online alarm clock post about alarm clocks, time, stopwatches, countdowns & related gadgets.blog.onlineclock.net/Novelty Clocks Blog
Although this is a Novelty Clocks blog, and I have been going over the novelty ... to be a positive, negative blog but it's a new clock so there are no reviews out ...www.noveltyclocksblog.com/" Clocks Grandfather Clocks Blog
... posting history about this grandfather clock, which we ... Subscribe by Email to Grandfather Clocks Blog: © 2007 1-800-4clocks.com. All Rights Reserved. ...www.grandfatherclocksblog.com/clocks

History

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. Such measurement requires devices. Devices operating on several different physical processes have been used over the millennia, culminating in the clocks of today.
Sundials and other devices
The sundial, which measures the time of day by the direction of shadows cast by the sun, was widely used in ancient times. A well-designed sundial can measure local solar time with reasonable accuracy, and sundials continued to be used to monitor the performance of clocks until the modern era. However, it has practical limitations - it requires the sun to shine and does not work at all during the night - encouraged the use of other techniques for measuring time. In India, the King of Jaipur the Pink City, Jai Singh II constructed many instruments and sundials in the observatories in cities Jaipur, Varanasi, Ujjain, Mathura between 1724-1730 A.D. He had a good interest in astronomy and town planning.
Candle clocks and sticks of incense that burn down at approximately predictable speeds have also been used to estimate the passing of time. In an hourglass, fine sand pours through a tiny hole at a constant rate and indicates a predetermined passage of an arbitrary period of time.
Water clocks
main: Water clock

Greek astronomer, Andronicus of Cyrrhus, supervised the construction of the Tower of the Winds in Athens in the 1st century B.C.
The Greek and Roman civilizations are credited for initially advancing water clock design to include complex gearing, which was connected to fanciful automata and also resulted in improved accuracy. These advances were passed on through Byzantium and Islamic times, eventually making their way to Europe. Independently, the Chinese developed their own advanced water clocks, passing their ideas on to Korea and Japan.
Some water clock designs were developed independently and some knowledge was transferred through the spread of trade. It is important to point out that the need for the common person to 'know what time it is' largely did not exist until the Industrial Revolution, when it became important to keep track of hours worked. In the earliest of times, however, the purpose for using a water clock was for astronomical and astrological reasons. These early water clocks were calibrated with a sundial. While never reaching the level of accuracy based on today's standards of timekeeping, the water clock was the most accurate and commonly used timekeeping device for millennia, until it was replaced by the more accurate pendulum clock in 17th century Europe.



























