ctesibius
11Hydromechanics — (Gr. ubpops avuca ) is the science of the mechanics of water and fluids in general, including hydrostatics or the mathematical theory of fluids in equilibrium, and hydrodynamics, the theory of fluids in motion. The practical application of… …
12Cráteres lunares — Anexo:Cráteres lunares Saltar a navegación, búsqueda Esta es una lista de 1517 cráteres de impacto lunares que han sido nombrados. La convención de la UAI para nombrar estos accidentes selenográficos es la de usar los nombres aquellos fallecidos… …
13keyboard instrument — ▪ music Introduction any musical instrument on which different notes can be sounded by pressing a series of keys, push buttons, or parallel levers. In nearly all cases in Western music the keys correspond to consecutive notes in the… …
14Robot — This article is about mechanical robots. For other uses of the term, see robot (disambiguation). For software agents, see Bot. ASIMO (2000) at the Expo 2005, a humanoid robot …
15Vitruvius — A 1684 depiction of Vitruvius (right) presenting De Architectura to Augustus Marcus Vitruvius Pollio (born c. 80–70 BC, died after c. 15 BC) was a Roman writer, architect and engineer,[1] active in the 1st century BC. He is best known… …
16Hero of Alexandria — Heron Born c. 10 AD Residence …
17Water organ — The water organ or hydraulic organ (early types are sometimes called hydraulis, hydraulos, hydraulus or hydraula) is a type of automatic pipe organ blown by air, where the power source pushing the air is derived by water from a natural source… …
18Gastraphetes — The gastraphetes (from Ancient Greek γαστραφέτης , English translation: belly bow ) was a hand held crossbow used by the Ancient Greeks.Duncan Campbell: Greek and Roman Artillery 399 BC AD 363 , Osprey Publishing, Oxford 2003, ISBN 1841766348,… …
19History of cannon — The history of cannon spans several hundred years. First used in China, they were among the earliest forms of gunpowder artillery, and over time replaced siege engines mdash;among other forms of aging weaponry mdash;on the battlefield. The first… …
20Obelisk of Theodosius — The obelisk of Theodosius I in Istanbul. The Obelisk of Theodosius (Turkish: Dikilitaş) is the Ancient Egyptian obelisk of Pharaoh Tutmoses III re erected in the Hippodrome of Constantinople (known today a …
