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2. Roman timekeeping - Wikipedia

   en.wikipedia.org/wiki/Roman_timekeeping

   The daytime canonical hours of the Catholic Church take their names from the Roman clock: the prime, terce, sext and none occur during the first (prīma) = 6 am, third (tertia) = 9 am, sixth (sexta) = 12 pm, and ninth (nōna) = 3 pm, hours of the day. The English term noon is also derived from the ninth hour. This was a period of prayer ...

3. History of timekeeping devices - Wikipedia

   en.wikipedia.org/wiki/History_of_timekeeping_devices

   Oscillating timekeepers are used in modern timepieces. Sundials and water clocks were first used in ancient Egypt c.1200 BC (or equally acceptable BCE) and later by the Babylonians, the Greeks and the Chinese. Incense clocks were being used in China by the 6th century.

4. Elephant clock - Wikipedia

   en.wikipedia.org/wiki/Elephant_clock

   Elephant clock. The elephant clock in a manuscript by Al-Jazari (1206 AD) from The Book of Knowledge of Ingenious Mechanical Devices. [1] 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, The Book of Knowledge of Ingenious Mechanical Devices.

5. History of timekeeping devices in Egypt - Wikipedia

   en.wikipedia.org/wiki/History_of_timekeeping...

   Ancient Egyptian sundial (c. 1500 BC), from the Valley of the Kings, used for measuring work hour. Daytime divided into 12 parts. The ancient Egyptians were one of the first cultures to widely divide days into generally agreed-upon equal parts, using early timekeeping devices such as sundials, shadow clocks, and merkhets (plumb-lines used by early astronomers).

6. Ismail al-Jazari - Wikipedia

   en.wikipedia.org/wiki/Ismail_al-Jazari

   These included geared clocks and a portable water-powered scribe clock, which was a meter high and half a meter wide. The scribe with his pen was synonymous to the hour hand of a modern clock. [ 34 ] [ 59 ] Al-Jazari's famous water-powered scribe clock was reconstructed successfully at the Science Museum, London in 1976.

7. Ctesibius - Wikipedia

   en.wikipedia.org/wiki/Ctesibius

   Ctesibius' water clock, as visualized by the 17th-century French architect Claude Perrault. Ctesibius or Ktesibios or Tesibius (Greek: Κτησίβιος; fl.285–222 BCE) was a Greek inventor and mathematician in Alexandria, Ptolemaic Egypt. [ 1 ] Very little is known of Ctesibius' life, but his inventions were well known in his lifetime. [ 2 ]

8. Alarm clock - Wikipedia

   en.wikipedia.org/wiki/Alarm_clock

   This is an accepted version of this page This is the latest accepted revision, reviewed on 11 October 2024. Type of clock A traditional wind-up (key-wound), mechanical spring-powered alarm clock An alarm clock or alarm is a clock that is designed to alert an individual or group of people at a specified time. The primary function of these clocks is to awaken people from their night's sleep or ...

9. Merkhet - Wikipedia

   en.wikipedia.org/wiki/Merkhet

   A merkhet (Science Museum, London) The merkhet or merjet (Ancient Egyptian: mrḫt, 'instrument of knowing' [1]) was an ancient surveying and timekeeping instrument. It involved the use of a bar with a plumb line, attached to a wooden handle. [2] It was used to track the alignment of certain stars called decans or "baktiu" in the Ancient Egyptian.