Global Information Lookup Global Information

Water clock information


A display of two outflow water clocks from the Ancient Agora Museum in Athens. The top is an original from the late 5th century BC. The bottom is a reconstruction of a clay original.

A water clock or clepsydra (from Ancient Greek κλεψύδρα (klepsúdra) 'pipette, water clock'; from κλέπτω (kléptō) 'to steal', and ὕδωρ (hydor) 'water'; lit.' water thief') is a timepiece by which time is measured by the regulated flow of liquid into (inflow type) or out from (outflow type) a vessel, and where the amount of liquid can then be measured.

Water clocks are one of the oldest time-measuring instruments.[1] The simplest form of water clock, with a bowl-shaped outflow, existed in Babylon, Egypt, and Persia around the 16th century BC. Other regions of the world, including India and China, also provide early evidence of water clocks, but the earliest dates are less certain. Water clocks were used in ancient Greece and in ancient Rome, as described by technical writers such as Ctesibius (died 222 BC) and Vitruvius (died after 15 BC).

  1. ^ Turner 1984, p. 1

and 25 Related for: Water clock information

Request time (Page generated in 1.2565 seconds.)

Water clock

Last Update:

A water clock or clepsydra (from Ancient Greek κλεψύδρα (klepsúdra) 'pipette, water clock'; from κλέπτω (kléptō) 'to steal', and ὕδωρ (hydor) 'water';...

Word Count : 4941

Clock

Last Update:

range of duration timers, a well-known example being the hourglass. Water clocks, along with sundials, are possibly the oldest time-measuring instruments...

Word Count : 11198

Alarm clock

Last Update:

clock mechanisms in astronomical clocks in the 10th and 11th centuries, respectively. A striking clock outside of China was the water-powered clock tower...

Word Count : 2569

Elephant clock

Last Update:

The elephant clock was a model of water clock invented by the medieval Islamic engineer Ismail al-Jazari (1136–1206). Its design was detailed in his book...

Word Count : 679

Bibliography of water clocks

Last Update:

This is a bibliography of water clocks. Barnett, Jo Ellen (1998). Time's Pendulum: From Sundials to Atomic Clocks, the Fascinating History of Timekeeping...

Word Count : 2281

History of timekeeping devices

Last Update:

time by continuous processes, such as the flow of liquid in water clocks, to mechanical clocks, and eventually repetitive, oscillatory processes, such as...

Word Count : 10785

Hornsby Water Clock

Last Update:

The Hornsby Water Clock, titled Man, Time and the Environment is a piece of kinetic sculpture, a decorative fountain and a functional clock in the Florence...

Word Count : 1527

Clock tower

Last Update:

Clock towers are a specific type of structure that house a turret clock and have one or more clock faces on the upper exterior walls. Many clock towers...

Word Count : 1449

Turret clock

Last Update:

A turret clock or tower clock is a clock designed to be mounted high in the wall of a building, usually in a clock tower, in public buildings such as...

Word Count : 1655

Clock of Flowing Time

Last Update:

The Clock of Flowing Time (German: Uhr der fließenden Zeit) is a 13 metres (43 ft) high water clock extending over three floors in the Berlin Europa-Center...

Word Count : 164

Jayrun Water Clock

Last Update:

The Jayrun Water Clock, a water clock built by the Muslim engineer Muhammad al-Sa'ati, was positioned at the gate of Damascus, Syria, at the exit of the...

Word Count : 362

Daylight saving time

Last Update:

changes to water clocks to accommodate this. However, these were changes to the time divisions of the day rather than setting the whole clock forward. In...

Word Count : 12310

Incense clock

Last Update:

hours, or days. The clock may also contain bells and gongs which act as strikers. Although the water clock and astronomical clock were known in China...

Word Count : 1331

Time

Last Update:

variety of means such as a pendulum. Alarm clocks first appeared in ancient Greece around 250 BC with a water clock that would set off a whistle. This idea...

Word Count : 12906

Verge escapement

Last Update:

of all-mechanical clocks. This caused a shift from measuring time by continuous processes, such as the flow of liquid in water clocks, to repetitive, oscillatory...

Word Count : 3216

Ancient Greek technology

Last Update:

include the gear, screw, rotary mills, bronze casting techniques, water clock, water organ, the torsion catapult, the use of steam to operate some experimental...

Word Count : 1550

Hourglass

Last Update:

origin of the hourglass is unclear. Its predecessor the clepsydra, or water clock, is known to have existed in Babylon and Egypt as early as the 16th century...

Word Count : 2468

Amphiareion of Oropos

Last Update:

McK. Camp II, "Notes on a Water Clock in the Athenian Agora", Hesperia 46 (1977), pp. 147–161. JSTOR 147833. (The clock at the Amphiareion is discussed...

Word Count : 1770

Striking clock

Last Update:

clock is a clock that sounds the hours audibly on a bell, gong, or other audible device. In 12-hour striking, used most commonly in striking clocks today...

Word Count : 2707

Ctesibius

Last Update:

instrument. He improved the water clock or clepsydra ('water thief'), which for more than 1,800 years was the most accurate clock ever constructed, until...

Word Count : 551

Borugak Jagyeongnu

Last Update:

The Borugak Jagyeongnu ("Water Clock of Borugak Pavilion"), classified as a scientific instrument, is the 229th National Treasure of South Korea and was...

Word Count : 475

Clock position

Last Update:

A clock position, or clock bearing, is the direction of an object observed from a vehicle, typically a vessel or an aircraft, relative to the orientation...

Word Count : 3361

Japanese clock

Last Update:

mechanical clock technology to the needs of traditional Japanese timekeeping. Clocks have existed in Japan since the mid-7th century AD in the form of water clocks...

Word Count : 1879

Astronomical clock

Last Update:

An astronomical clock, horologium, or orloj is a clock with special mechanisms and dials to display astronomical information, such as the relative positions...

Word Count : 6710

Mustansiriya Madrasah

Last Update:

of the Madrasa also had a salary. In 1235, an early monumental water-powered alarm clock that announced the appointed hours of prayer and the time both...

Word Count : 2446

PDF Search Engine © AllGlobal.net