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Sunday Stone
"Sunday stone" is an artificial stone composed of calcium carbonate that formed on the walls of drainage pipes in some coal mines. It is striped due to the differing levels of coal dust produced during the day and night shifts. In some cases, a broader stripe is generated every seven days due to active mining not taking place on Sunday. Broader stripes would also appear when work stopped for other reasons. In one case, a broad stripe coincided with workers being given the day off to view a cockfight Cockfighting is a blood sport involving domesticated roosters as the combatants. The first documented use of the word gamecock, denoting use of the cock as to a "game", a sport, pastime or entertainment, was recorded in 1634, after the term .... Breaks of more than a day would produce an even broader stripe, such as when Christmas fell on a Monday. The Sunday stone would over time block the drainage pipes necessitating their replacement. Where mines have improved ventilation, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sunday Stone At The Natural History Museum
Sunday (Latin: ''dies solis'' meaning "day of the sun") is the day of the week between Saturday and Monday. Sunday is a day of rest in most Western countries and a part of the weekend. In some Middle Eastern countries, Sunday is a weekday. For most Christians, Sunday is observed as a day of worship and rest, holding it as the Lord's Day and the day of Christ's resurrection; in the United States, Canada, Japan, as well as in parts of South America, Sunday is the first day of the week. According to the Islamic calendar, Hebrew calendar and traditional calendars (including Christian calendars) Sunday is the first day of the week; Quaker Christians call Sunday the "first day" in accordance with their testimony of simplicity. The International Organization for Standardization ISO 8601, which is based in Switzerland, calls Sunday the seventh day of the week."Monday shall be identified as calendar day of any calendar week, and subsequent calendar days of the same calendar week shal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calcium Carbonate
Calcium carbonate is a chemical compound with the chemical formula . It is a common substance found in Rock (geology), rocks as the minerals calcite and aragonite, most notably in chalk and limestone, eggshells, gastropod shells, shellfish skeletons and pearls. Materials containing much calcium carbonate or resembling it are described as calcareous. Calcium carbonate is the active ingredient in agricultural lime and is produced when calcium ions in hard water react with carbonate ions to form limescale. It has medical use as a calcium supplement or as an antacid, but excessive consumption can be hazardous and cause hypercalcemia and digestive issues. Chemistry Calcium carbonate shares the typical properties of other carbonates. Notably, it: *reacts with acids, releasing carbonic acid which quickly disintegrates into carbon dioxide and water: : *releases carbon dioxide upon heating, called a thermal decomposition reaction, or calcination (to above 840 °C in the case of ), t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cock Fight
Cockfighting is a blood sport involving domesticated roosters as the combatants. The first documented use of the word gamecock, denoting use of the cock as to a "game", a sport, pastime or entertainment, was recorded in 1634, after the term "cock of the game" used by George Wilson, in the earliest known book on the sport of cockfighting in ''The Commendation of Cocks and Cock Fighting'' in 1607. But it was during Ferdinand Magellan's voyage of discovery of the Philippines in 1521 when modern cockfighting was first witnessed and documented for Westerners by the Italian Antonio Pigafetta, Magellan's chronicler, in the Kingdom of Taytay. The gamecocks (not to be confused with game birds) are specially bred and conditioned for increased stamina and strength. Male and female chickens of such a breed are referred to as gamefowl. Cocks are also bred to be aggressive towards other males of their species. Wagers are often made on the outcome of the match, held in a ring called a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Hemsley Pearn
John Hemsley Pearn is a retired Australian paediatrician, soldier, former surgeon general of the Australian Defence Force, academic, historian, author, and educator. Early life and education Pearn attended Brisbane Grammar School, graduating in 1957. He was an active Boy Scout and in 1955 was awarded the Scout Cord. Pearn gained a Bachelor of Science (BSc) degree from the University of Queensland, graduating with First Class Honours in Medicine and Surgery (MBBS) in 1964. Pearn was awarded a Doctor of Medicine (MD) in 1969, with his thesis examining the embryo-pathic effects of indospicine. Pearn went on to complete a PhD on spinal muscular atrophy at the University of London. Career John Pearn was appointed as a full-time staff member of the University of Queensland (UQ) in 1966, when he was engaged as a lecturer in the Department of Pathology, later joining the Department of Child Health in 1968. In 1976, he was promoted to Reader in Child Health. In 1986, Pearn was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
