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

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

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

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...

by al-Jazari, who employed them in his automata, water clocks (such as the candle clock) and water-raising machines. The eccentrically mounted handle...

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

The Water Clock, also known as The Giant Water Clock, is in the permanent collection of The Children's Museum of Indianapolis located in Indianapolis,...

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...

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

12-hour clock can be traced back as far as Mesopotamia and ancient Egypt. Both an Egyptian sundial for daytime use and an Egyptian water clock for night-time...

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...

of water clocks had been established during the Three Kingdoms Period. The Korean water clock consisted of two stacked jars of water, with water dropping...

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...

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...

of the Clock') is a 14th-century building in Fes, Morocco, built by the Marinid Sultan Abu Inan Faris which houses a weight-powered water clock. It is...

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...

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...

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...

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...

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...

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

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...

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...

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

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

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...

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...

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...

deities. The eight-metre-high structure also featured sundials, and a water clock inside. It dated from around 50 BC. Military documents from the Three...

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