1. THE HISTORY OFCLOCKSNAMES: KARINA LIMALADY NAYASCUAL2013

2. THE HISTORY OF CLOCKS The measurement of time since man existsdifferentiate the day from the night, the timethe first measurements were made throughastronomical observations and for a long timethe sky was the main instrument of thatmeasurement.

3. The ancient Egyptians wereguided by the position of the sun,which invented the sundial Theyemployed during the day, theshadow cast by a gnomon orstyle on a surface with a scale toindicate the position of the Sun inthe diurnal motion. Also inventedthe water clock was used at nightthey used a clepsydra or water-filled vessel. Egyptian waterclock, more or less modified,continued to be the most efficientinstrument for measuring timeover many centuries.

4. The Romans also used a candle whereeach fragment consumed was a nightpiece worn. Then came "The Sands ofTime" or hourglass operate on the samephysical concept of water clocks, Is letgravity do flow a set amount of an item(in this case water sand) to determinevarious lengths of time.

5. During the Middle Ages were the ingenious weight-driven mechanisms. Watches since joined the fast-pacedworld of mechanization. In the thirteenth century, at theedge end of the Middle Ages, appeared the firstindustrial machine: the clock. These watches were madeof steel primitive and suffering from the expansion andcontraction caused by temperature changes. Wereinaccurate in a range of 15-30 minutes a day and had tobe adjusted daily. Its initial purpose was to ring the bellsevery hour on the towers of castles, churches orpopulation centers

6. In the fifteenth century clocks were invented a hand tomark the hours and in 1505 the German Peter Henleinblacksmith managed to build mechanical watches sosmall that they could be pocketed.

7. The first watchmaking revolution occurred inthe seventeenth century, when the Dutchscientist Christiaan Huygens invented thependulum clock,

8. The first wristwatch was made at the request of theQueen of Naples Maria Carolina of Austria in 1812. Thisunique clock made at the whim of the Queen was asingle pocket watch attached or rather mounted on abracelet of gold and precious stones. However, the firstwristwatch wrist or rather was a creation of the BrazilianAlberto Santos Dumont and Louis Cartier in 1901.

9. In 1929, the American watchmaker Marrisson AlbinWarren invented the quartz watch, with an accuracy of30 to 0.3 seconds per year.

10. In 1957 came the electric wristwatches. The firstelectric wristwatch in the world was the HamiltonElectric HUMANITY SINCE CREATED A NUMBER NOTWATCH AS WE KNOW TODAY.