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The word gypsum is derived from the Greek word γύψος (gypsos), "plaster". [9] Because the quarries of the Montmartre district of Paris have long furnished burnt gypsum (calcined gypsum) used for various purposes, this dehydrated gypsum became known as plaster of Paris. Upon adding water, after a few dozen minutes, plaster of Paris becomes ...
plaster an adhesive bandage placed on a minor cut or scrape (UK also: sticking/sticky plaster, Elastoplast; US: Band-Aid); a cast of plaster of Paris ("a leg in plaster") a pastelike mixture that hardens when applied to walls and ceilings; (plastered) drunk platform when appended with a number signifies a specific platform in a station (US: track)
Plaster of Paris is stored in moisture-proof containers, because the presence of moisture can cause slow setting of plaster of Paris by bringing about its hydration, which will make it useless after some time. [19] When the dry plaster powder is mixed with water, it rehydrates over time into gypsum.
Chalkware is an American term for popular figurines either made of moulded plaster of Paris (usually) or sculpted gypsum, and painted, typically with oils or watercolors.
In the middle of the 19th century, the centre of Paris was viewed as overcrowded, dark, dangerous, and unhealthy. In 1845, the French social reformer Victor Considerant wrote: "Paris is an immense workshop of putrefaction, where misery, pestilence and sickness work in concert, where sunlight and air rarely penetrate.
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The Treaty of Paris, signed in Paris by representatives of King George III of Great Britain and representatives of the United States on September 3, 1783, officially ended the American Revolutionary War and recognized the Thirteen Colonies, which had been part of colonial British America, to be free, sovereign and independent states.
Mortar holding weathered bricks. Mortar is a workable paste which hardens to bind building blocks such as stones, bricks, and concrete masonry units, to fill and seal the irregular gaps between them, spread the weight of them evenly, and sometimes to add decorative colours or patterns to masonry walls.