clepsydra, ancient device for measuring time by the gradual flow of water.One form, used by the North American Indians and some African peoples, consisted of a small boat or floating vessel that shipped water through a hole until it sank. In another form, the vessel was filled with water that was allowed to escape through a hole, and the …

Most scholars agree that the Egyptian day began at dawn, before the rising of the sun, rather than sunrise. In ancient Egypt the day was split equally into twelve hours for the night and as many for the day, logically the value of each hour varied according to the season of the year.

CLEPSYDRA CLEPSYDRA, Latin, from Greek klepsudra : kleptein, kleps-, to steal + hudōr water, was an horological instrument of great antiquity, among the Egyptians and other eastern nations, probably before sun-dials were invented; though the name of the original inventor is not handed down to us ; the construction has been varied in different …

Water fills a canister. A float is lifted. A figure is mounted on its top, which points to a cylinder-shaped board. On the board are 24 squares, which stand for hours.

The meaning of CLEPSYDRA is water clock. Did you know?

La clepsydre, une "horloge à eau". À partir du III e siècle av. JC, les travaux de Ctesibios 2, un physicien grec d'Alexandrie, font évoluer la clepsydre vers un système de plus en plus complexe dans lequel l'eau n'est plus seulement l'instrument de la mesure du temps. Elle devient une source d'énergie qui permet la mise en mouvement des ...

クレプシドラ 滴漏计时器 Clepsydra Clepsydre. Glossary. Thematic Technic, Time. Also known as a water clock. An instrument that measures time by the flow of a quantity of a fluid (water or mercury). The Egyptians and the Chinese used clepsydras in the fifteenth century BC. Clepsydras are also still used in the XVIIIth century.

The clepsydra was originally a container filled with water that had a hole at the bottom to let the liquid out. This allowed a calculation of passing time and served, for example, to regulate the length of night-time guard duties or time lawyers' speeches during trials.

Fragments of a black basalt clepsydra: comprising most of the height of a clepsydra, or water clock. On the outer face the incised figured frieze contains parts of two scenes. In both the pharaoh depicted making offerings is unnamed in the accompanying cartouches, but his identity is supplied in the first of the two rows of hieroglyphs below as Alexander the Great. In the right-facing scene he ...

clepsydra klĕpˈsĭdrə [key] or water clock, ancient device for measuring time by means of the flow of water from a container. A simple form of clepsydra was an earthenware vessel with a small opening through which the water dripped; as the water