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The gnomon is the triangular blade in this sundial. A gnomon (/ ˈ n oʊ ˌ m ɒ n,-m ə n /; from Ancient Greek γνώμων (gnṓmōn) 'one that knows or examines') [1] [2] is the part of a sundial that casts a shadow. The term is used for a variety of purposes in mathematics and other fields, typically to measure directions, position, or time.
[11] [12] Sundials existed in China since ancient times, but very little is known of their history. It is known that the ancient Chinese developed a form of sundials c. 800 BCE, and the sundials eventually evolved to very sophisticated water clocks by 1000 CE, and sometime in the Song dynasty (1000–1400 CE), a compass would sometimes also be ...
Liubo (Chinese: 六博; Old Chinese *kruk pˤak “six sticks”) was an ancient Chinese board game for two players. The rules have largely been lost, but it is believed that each player had six game pieces that were moved around the points of a square game board that had a distinctive, symmetrical pattern.
A shepherd's dial (also known as a pillar dial or cylinder) is a type of sundial that measures the height of the sun via the so-called umbra versa. [1] Its design needs to incorporate a fixed latitude, but it is small and portable. It is named after Pyrenean shepherds, who would trace such a sundial on their staffs. This type of sundial was ...
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).
A Korean sundial first made by Jang Yeong-sil during the Joseon period, displayed in Gyeongbokgung. Jang's invention of the water clock saw the start of its use throughout the country, however, these water clocks were very costly. Development of the sundial provided a cheaper and more manageable alternative.
The scaphe (Ancient Greek: σκάφη, romanized: scaphe, lit. 'bowl'; also known as a skaphe, scaphion (diminutive) or Latin: scaphium) was a sundial said to have been invented by Aristarchus of Samos (3rd century BC). There are no original works still in existence by Aristarchus, but the adjacent picture is an image of what it might have ...
There are numerous Chinese names for the fire-producing "sun-mirror" and water-producing "moon-mirror". These two bronze implements are literary metaphors for yin and yang, associating the "yang-mirror" yangsui with the Sun (a.k.a. tàiyáng 太陽 "great yang"), fire, dry, and round, and the "yin-mirror" fangshu with the Moon (tàiyīn 太陰 "great yin"), water, wet, and square.
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