The Ancient EngineersDoubleday, 1963 - 408 páginas This book is about those whose genius enabled the Egyptians to build their pyramids, the Phoenicians to cross stormy seas, the Romans to erect magnificent public buildings--that this carefully researched and fascinatingly written account of the advance of early technology has been written.Mr. de Camp describes the methods used by early irrigators, architects, and military engineers to build and maintain structures to serve their rulers' wants. He tells, for example, how the Pharaohs erected obelisks and pyramids, how Nebuchadnezzar fortified Babylon, how Dionysios' ordnance department invented the catapult, how the Chinese built the Great Wall, and how the Romans fashioned their roads, baths, sewers, and aqueducts. He recounts many intriguing anecdotes: an Assyrian king putting up no-parking signs in Nineveh; Plato inventing a water clock with an alarm to signal the start of his classes; Heron of Alexandria designing a coin-operated holy-water fountain; a Chinese emperor composing a poem to be inscribed on a clock invented by one of his civil servants. |
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Página 145
... clock , appeared in ancient Egypt . In its original form it was a jar with a hole in the bottom , into which a measured amount of water was poured . When the water had all run out , time was up . The Athenians used the clepsydra to ...
... clock , appeared in ancient Egypt . In its original form it was a jar with a hole in the bottom , into which a measured amount of water was poured . When the water had all run out , time was up . The Athenians used the clepsydra to ...
Página 146
... water clock . The rate of flow of water through a hole in the bottom of a jar is not always the same . Water flows faster if the head of water - that is , the depth of the water at the orifice is greater . Hence if two dippers of water ...
... water clock . The rate of flow of water through a hole in the bottom of a jar is not always the same . Water flows faster if the head of water - that is , the depth of the water at the orifice is greater . Hence if two dippers of water ...
Página 148
... water clock , though without stating whether Ktesibios or one of his successors built it . One improvement in the mechanism was to connect the float with the revolving shaft by a cord wound around a drum and counterweighted , instead of ...
... water clock , though without stating whether Ktesibios or one of his successors built it . One improvement in the mechanism was to connect the float with the revolving shaft by a cord wound around a drum and counterweighted , instead of ...
Contenido
One The Coming of the Engineers | 1 |
Two The Egyptian Engineers | 18 |
Three The Mesopotamian Engineers | 46 |
Derechos de autor | |
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Términos y frases comunes
Agrippa Alexandria ancient aqueducts Arabs arch Archimedes architect Aristotle armor army Athens Babylon became began brick bridge bronze builders building built Byzantine called canal castle catapults centuries China Chinese civilization classical columns conquered Demetrios dome early Egypt Egyptian emperor Empire engineering Europe feet fire Frontinus galleys gear Greek Hadrian Hellenistic Hence Herodotos Heron Heron of Alexandria High Middle Ages horse houses Imhotep India invention iron irrigation kings Ktesibios Lake land later Leonardo mechanical medieval Mediterranean Mesopotamia Mesopotamian Middle Ages miles mill modern Mongols Muslim Nemi ships oars palaces Persian Philon Philon of Byzantium Phoenicians piers pipes probably Ptolemaios pyramid Renaissance river roads Roman Rome roof rowers sail Sennacherib shaft ships side siege statue stone structure temple took tower Trajan treadwheel tunnel turned vault Vitruvius wall water clock water wheel wooden