|
Water Clock
A water clock, or clepsydra (; ; ), 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 some of the oldest time-measuring instruments. 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). Designs A water clock uses the flow of water to measure time. If viscosity is neglected, the physical principle required to study such clocks is Torricelli's law. Two types of water clock exist: inflow and outflow. In an outflow water clock, a container is filled with wate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ctesibius
Ctesibius or Ktesibios or Tesibius (; BCE) was a Greek inventor and mathematician in Alexandria, Ptolemaic Egypt. Very little is known of Ctesibius' life, but his inventions were well known in his lifetime. He was likely the first head of the Museum of Alexandria. He wrote the first treatises on the science of compressed air and its uses in pumps (and even in a kind of cannon). This, in combination with his work ''On pneumatics'' on the elasticity of air, earned him the title of "father of pneumatics." None of his written work has survived, including his ''Memorabilia,'' a compilation of his research that was cited by Athenaeus. Ctesibius' most commonly known invention today is a pipe organ (hydraulis), a predecessor of the modern church organ. Inventions Ctesibius was the son of a barber, born BCE, probablybut not certainlyin Alexandria. He began his career as a barber, following his father. During this first career, he invented a counterweight-adjustable mirror. Another ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AGMA Clepsydre , the local government association for Greater Manchester, England
{{disambig ...
Agma is a name for the velar nasal speech sound and the letter ⟨⟩ that stands for it. AGMA may refer to: * Alliance for Gray Market and Counterfeit Abatement, an anti-counterfeiting and gray market organization * American Gear Manufacturers Association, a trade group for companies involved in gears, couplings and related power transmission components and equipment * American Guild of Musical Artists, an entertainment labor union * Association of Greater Manchester Authorities Association may refer to: *Club (organization), an association of two or more people united by a common interest or goal *Trade association, an organization founded and funded by businesses that operate in a specific industry *Voluntary associatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Escapement
An escapement is a mechanical linkage in mechanical watches and clocks that gives impulses to the timekeeping element and periodically releases the gear train to move forward, advancing the clock's hands. The impulse action transfers energy to the clock's timekeeping element (usually a pendulum or balance wheel) to replace the energy lost to friction during its cycle and keep the timekeeper oscillating. The escapement is driven by force from a coiled spring (device), spring or a suspended weight, transmitted through the timepiece's gear train. Each swing of the pendulum or balance wheel releases a tooth of the escapement's ''escape wheel'', allowing the clock's gear train to advance or "escape" by a fixed amount. This regular periodic advancement moves the clock's hands forward at a steady rate. At the same time, the tooth gives the timekeeping element a push, before another tooth catches on the escapement's pallet, returning the escapement to its "locked" state. The sudden stoppi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karnak
The Karnak Temple Complex, commonly known as Karnak (), comprises a vast mix of temples, pylons, chapels, and other buildings near Luxor, Egypt. Construction at the complex began during the reign of Senusret I (reigned 1971–1926 BC) in the Middle Kingdom () and continued into the Ptolemaic Kingdom (305–30 BC), although most of the extant buildings date from the New Kingdom. The area around Karnak was the ancient Egyptian ''Ipet-isut'' ("The Most Selected of Places") and the main place of worship of the 18th Dynastic Theban Triad, with the god Amun as its head. It is part of the monumental city of Thebes, and in 1979 it was added to the UNESCO World Heritage List along with the rest of the city. Karnak gets its name from the nearby, and partly surrounded, modern village of El-Karnak, north of Luxor. Name The original name of the temple was ''Ipet-isut'', meaning "The Most Select of Places". The complex's modern name "Karnak" comes from the nearby village of el-Karnak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Precinct Of Amun-Re
The Precinct of Amun-Re, located near Luxor, Egypt, is one of the four main temple enclosures that make up the immense Karnak Temple Complex. The precinct is by far the largest of these and the only one that is open to the general public. The temple complex is dedicated to the principal god of the Theban Triad, Amun, in the form of Amun-Re. The site occupies some 250,000 m2 and contains many structures and monuments. The main temple itself, the Temple of Amun, covers some 61 acres. Some parts of the complex are closed or semi-closed, including large parts of the North-South Axis (the 8th, 9th, and 10th pylons), which are under active excavation or restoration. The whole southeast corner is semi-closed. The northwest corner is a museum that requires an additional ticket to visit. Most of the southwest is an open-air assembling area containing millions of stone fragments, from small to huge, laid out in long rows, awaiting reassembly into their respective monuments. The area i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amenhotep III
Amenhotep III ( , ; "Amun is satisfied"), also known as Amenhotep the Magnificent or Amenhotep the Great and Hellenization, Hellenized as Amenophis III, was the ninth pharaoh of the Eighteenth Dynasty of Egypt, Eighteenth Dynasty. According to different authors following the "Low Chronology", he ruled New Kingdom of Egypt, Egypt from June 1386 to 1349 BC, or from June 1388 BC to December 1351 BC/1350 BC, after his father Thutmose IV died. Amenhotep was Thutmose's son by a minor wife, Mutemwiya. His reign was a period of unprecedented prosperity and splendour, when Egypt reached the peak of its artistic and international power, and as such he is considered one of ancient Egypt's greatest pharaohs. He is also one of the few pharaohs who was one of the few pharoahs who was List of pharaohs deified during lifetime, worshipped as a deity during his lifetime. When he died in the 38th or 39th year of his reign he was succeeded by his son Amenhotep IV, who later changed his name to Akhe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Kingdom Of Egypt
The New Kingdom, also called the Egyptian Empire, refers to ancient Egypt between the 16th century BC and the 11th century BC. This period of History of ancient Egypt, ancient Egyptian history covers the Eighteenth Dynasty of Egypt, Eighteenth, Nineteenth Dynasty of Egypt, Nineteenth, and Twentieth Dynasty of Egypt, Twentieth dynasties. Through radiocarbon dating, the establishment of the New Kingdom has been placed between 1570 and 1544 BC. The New Kingdom followed the Second Intermediate Period of Egypt, Second Intermediate Period and was succeeded by the Third Intermediate Period of Egypt, Third Intermediate Period. It was the most prosperous time for the Egyptians#History, Egyptian people and marked the peak of Egypt's power. In 1845, the concept of a "New Kingdom" as Periodization of ancient Egypt, one of three "golden ages" was coined by German scholar Christian Charles Josias von Bunsen; the original definition would evolve significantly throughout the 19th and 20th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Verge Escapement
The verge (or crown wheel) escapement is the earliest known type of mechanical escapement, the mechanism in a mechanical clock that controls its rate by allowing the gear train to advance at regular intervals or 'ticks'. Verge escapements were used from the late 13th century until the mid 19th century in clocks and pocketwatches. The name verge comes from the Latin ''virga'', meaning stick or rod. Its invention is important in the history of technology, because it made possible the development of all-mechanical clocks. This caused a shift from measuring time by Continuous function, continuous processes, such as the flow of liquid in water clocks, to repetitive, oscillatory processes, such as the swing of pendulums, which had the potential to be more accurate., p.31 Oscillating timekeepers keep time for all modern clocks. Verge and foliot clocks The verge escapement dates from 13th-century Europe, where its invention led to the development of the first all-mechanical clocks ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sundial
A sundial is a horology, horological device that tells the time of day (referred to as civil time in modern usage) when direct sunlight shines by the position of the Sun, apparent position of the Sun in the sky. In the narrowest sense of the word, it consists of a flat plate (the ''dial'') and a gnomon, which casts a shadow onto the dial. As the Sun diurnal motion, appears to move through the sky, the shadow aligns with different hour-lines, which are marked on the dial to indicate the time of day. The ''style'' is the time-telling edge of the gnomon, though a single point or ''nodus'' may be used. The gnomon casts a broad shadow; the shadow of the style shows the time. The gnomon may be a rod, wire, or elaborately decorated metal casting. The style must be polar alignment, parallel to the axis of the Earth's rotation for the sundial to be accurate throughout the year. The style's angle from horizontal is equal to the sundial's geographical latitude. The term ''sundial'' can r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan
Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea in the south. The Japanese archipelago consists of four major islands—Hokkaido, Honshu, Shikoku, and Kyushu—and List of islands of Japan, thousands of smaller islands, covering . Japan has a population of over 123 million as of 2025, making it the List of countries and dependencies by population, eleventh-most populous country. The capital of Japan and List of cities in Japan, its largest city is Tokyo; the Greater Tokyo Area is the List of largest cities, largest metropolitan area in the world, with more than 37 million inhabitants as of 2024. Japan is divided into 47 Prefectures of Japan, administrative prefectures and List of regions of Japan, eight traditional regions. About three-quarters of Geography of Japan, the countr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Korea
Korea is a peninsular region in East Asia consisting of the Korean Peninsula, Jeju Island, and smaller islands. Since the end of World War II in 1945, it has been politically Division of Korea, divided at or near the 38th parallel north, 38th parallel between North Korea (Democratic People's Republic of Korea; DPRK) and South Korea (Republic of Korea; ROK). Both countries proclaimed independence in 1948, and the two countries fought the Korean War from 1950 to 1953. The region is bordered by China to the north and Russia to the northeast, across the Yalu River, Amnok (Yalu) and Tumen River, Duman (Tumen) rivers, and is separated from Japan to the southeast by the Korea Strait. Known human habitation of the Korean peninsula dates to 40,000 BC. The kingdom of Gojoseon, which according to tradition was founded in 2333 BC, fell to the Han dynasty in 108 BC. It was followed by the Three Kingdoms of Korea, Three Kingdoms period, in which Korea was divided into Goguryeo, Baekje, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Europe
Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east. Europe shares the landmass of Eurasia with Asia, and of Afro-Eurasia with both Africa and Asia. Europe is commonly considered to be Boundaries between the continents#Asia and Europe, separated from Asia by the Drainage divide, watershed of the Ural Mountains, the Ural (river), Ural River, the Caspian Sea, the Greater Caucasus, the Black Sea, and the waterway of the Bosporus, Bosporus Strait. "Europe" (pp. 68–69); "Asia" (pp. 90–91): "A commonly accepted division between Asia and Europe ... is formed by the Ural Mountains, Ural River, Caspian Sea, Caucasus Mountains, and the Black Sea with its outlets, the Bosporus and Dardanelles." Europe covers approx. , or 2% of Earth#Surface, Earth's surface (6.8% of Earth's land area), making it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
