Search results
Results from the WOW.Com Content Network
Amethyst was used as a gemstone by the ancient Egyptians and was largely employed in antiquity for intaglio engraved gems. [22] The ancient Greeks believed amethyst gems could prevent intoxication, [23] while medieval European soldiers wore amethyst amulets as protection in battle in the belief that amethysts heal people and keep them cool-headed.
History of optics. Modern ophthalmic lens making machine. Optics began with the development of lenses by the ancient Egyptians and Mesopotamians, followed by theories on light and vision developed by ancient Greek philosophers, and the development of geometrical optics in the Greco-Roman world. The word optics is derived from the Greek term ...
Without proper rendering support, you may see question marks, boxes, or other symbols. The history of glass-making dates back to at least 3,600 years ago in Mesopotamia. However, most writers claim that they may have been producing copies of glass objects from Egypt. [ 1 ] Other archaeological evidence suggests that the first true glass was ...
Ink: Ink was used in Ancient Egypt for writing and drawing on papyrus from at least the 26th century BC. [134] Siphon: Ancient Egyptian reliefs from 1500 BC depict siphons used to extract liquids from large storage jars. [149][150] Merkhet: The merkhet was an ancient surveying and timekeeping instrument.
Crystal healing is a pseudoscientific alternative-medicine practice that uses semiprecious stones and crystals such as quartz, agate, amethyst or opal. Adherents of the practice claim that these have healing powers, but there is no scientific basis for this claim. [1][2][3] Practitioners of crystal healing believe they can boost low energy ...
Much of the economy was centrally organized and strictly controlled. Although the ancient Egyptians did not use coinage until the Late period, [76] they did use a type of money-barter system, [77] with standard sacks of grain and the deben, a weight of roughly 91 grams (3 oz) of copper or silver, forming a common denominator. [78]
There in the lands of ancient Egypt is the first evidence for stools, beds, and tables (such as from the tombs similar to Tutankhamun's). Recovered Ancient Egyptian furniture includes a third millennium BC bed discovered in the Tarkhan Tomb, a c.2550 BC. gilded set from the tomb of Queen Hetepheres I, and a c. 1550 BC. stool from Thebes.
The Middle Kingdom is the period in the history of ancient Egypt stretching from the 39th regnal year of Mentuhotep II of the Eleventh Dynasty to the end of the Thirteenth Dynasty, roughly between 2030 and 1650 BC. The period comprises two phases, the Eleventh Dynasty, which ruled from Thebes, and then the Twelfth Dynasty, whose capital was Lisht.