Individual Assignment ( Section1 )

        History of clock

Part 1: History 

In the past, it was very difficult to tell time because there was no machinery to calculate it. Then the Egyptians invented a time calculation method or a stick, planted in the ground to determine the time, by identifying the angel of the movement of the sun. However, sundials were not always useful because they did not work at the night.(thinkquest, n.d)  

 Also there was another kind of time telling device invented, the hourglass. This clock consists of a two glass bowls tied together by a small reed. Its works as sand spilled from the top to the bottom.  Over a period of time water was also used to tell astronomical time. After that, they invented the clock, which is a machine used to measure time. It was divided into two type's, mechanical and digital.(thinkquest, n.d)  

 They still don't know who invented the clock exactly, but there were several inventors, each one of them invented different kind of clock. Gerbert Doureak invented the first clock operated by gravity in 999 AD and a Dutch man called Christian Huygens invented the first clock with a pendulum in 1657. Also later French Louis Cartier and Swiss Hans Azadrov invented the first wristwatch in 1940. (wiki,n.d)