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Eylesbarrow Tin Mine
Eylesbarrow mine was a tin mine on Dartmoor, Devon, England that was active during the first half of the 19th century. In its early years it was one of the largest and most prosperous of the Dartmoor tin mines, along with Whiteworks and the Birch Tor and Vitifer mines. Its name has several variant spellings, such as Eylesburrow, Ailsborough, Ellisborough, Hillsborough etc. It was also known as Wheal Ruth for a short period around 1850. The extensive remains lie to the north of the River Plym, less than north-east of Drizzlecombe, on the southern shoulder of the hill called Eylesbarrow on top of which are two prominent Bronze Age barrows. Geology The country rock of the mine is granite. The large mining sett (about ) is crossed by many tin-bearing lodes which are substantially vertical and trend east-north-east. Most of the mine's excavations were made into just three of these lodes and were relatively shallow.Cook et al. 1974, Appendix A, pp.200-201 The formation of the lode ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dartmoor
Dartmoor is an upland area in southern Devon, England. The moorland and surrounding land has been protected by National Park status since 1951. Dartmoor National Park covers . The granite which forms the uplands dates from the Carboniferous Period of geological history. The landscape consists of moorland capped with many exposed granite hilltops known as tors, providing habitats for Dartmoor wildlife. The highest point is High Willhays, above sea level. The entire area is rich in antiquities and archaeology. Dartmoor National Park is managed by the Dartmoor National Park Authority, whose 22 members are drawn from Devon County Council, local district councils and Government. Parts of Dartmoor have been used as military firing ranges for over 200 years. The public is granted extensive land access rights on Dartmoor (including restricted access to the firing ranges) and it is a popular tourist destination. Physical geography Geology Dartmoor includes the largest area of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaolinite
Kaolinite ( ) is a clay mineral, with the chemical composition Al2 Si2 O5( OH)4. It is an important industrial mineral. It is a layered silicate mineral, with one tetrahedral sheet of silica () linked through oxygen atoms to one octahedral sheet of alumina () octahedra. Rocks that are rich in kaolinite are known as kaolin () or china clay. Kaolin is occasionally referred to by the antiquated term lithomarge, from the Ancient Greek ''litho-'' and Latin ''marga'', meaning 'stone of marl'. Presently the name lithomarge can refer to a compacted, massive form of kaolin. The name ''kaolin'' is derived from Gaoling (), a Chinese village near Jingdezhen in southeastern China's Jiangxi Province. The name entered English in 1727 from the French version of the word: , following François Xavier d'Entrecolles's reports on the making of Jingdezhen porcelain. Kaolinite has a low shrink–swell capacity and a low cation-exchange capacity (1–15 meq/100 g). It is a soft, earthy, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tin Coinage
In Devon and Cornwall, tin coinage was a tax on refined tin, payable to the Duchy of Cornwall and administered in the Stannary Towns. The oldest surviving records of coinage show that it was collected in 1156. It was abolished by the Tin Duties Act 1838. Method After smelting, the tin was cast into blocks which were taken to the Stannary towns to be proved. Initially irregular in shape, by the 19th century these blocks became standardised as bevel-edged rectangular cuboids weighing . The blocks were marked with a stamp identifying where they had been smelted. At the stannary town the prover, a duchy officer, struck off the corners of the blocks to check the quality of the metal. If proved and the duty paid, a duchy seal was affixed and the blocks permitted to be sold. In the 16th century proving took place only twice a year, at Midsummer and Michaelmas, but afterwards took place quarterly. Under Edmund, 2nd Earl of Cornwall the duty paid in Cornwall was a halfpenny p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White Tin
White tin is refined, metallic tin. White tin It contrasts with black tin, which is unrefined tin ore ( cassiterite) as extracted from the ground. The term "white tin" was historically associated with tin mining in Devon and Cornwall where it was smelted from black tin in blowing houses. White tin may also refer specifically to β-tin, the metallic allotrope of the pure element, as opposed to the nonmetallic allotrope α-tin (also known as gray tin) which occurs at temperatures below , a transformation known as tin pest Tin is a chemical element with the symbol Sn (from la, stannum) and atomic number 50. Tin is a silvery-coloured metal. Tin is soft enough to be cut with little force and a bar of tin can be bent by hand with little effort. When bent, t ...). White tin has tetragonal unit cell. References * * * * Tin mining Mining in Cornwall {{mining-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Public Auction
In public relations and communication science, publics are groups of individual people, and the public (a.k.a. the general public) is the totality of such groupings. This is a different concept to the sociological concept of the ''Öffentlichkeit'' or public sphere. The concept of a public has also been defined in political science, psychology, marketing, and advertising. In public relations and communication science, it is one of the more ambiguous concepts in the field. Although it has definitions in the theory of the field that have been formulated from the early 20th century onwards, and suffered more recent years from being blurred, as a result of conflation of the idea of a public with the notions of audience, market segment, community, constituency, and stakeholder. Etymology and definitions The name "public" originates with the Latin '' publicus'' (also '' poplicus''), from ''populus'', to the English word 'populace', and in general denotes some mass population ("the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Mining Journal (trade Magazine)
The ''Mining Journal'' covers global mining investment, finance, and business. Origins The ''Mining Journal'' was founded in 1835 in London by Henry English, a London stockbroker under the name of ''Mining Journal and Commercial Gazette''. In 1860 it was renamed to ''Mining Journal, Railway and Commercial Gazette'' and by 1910 it was called ''Mining Journal''. In the early days of ''Mining Journal'', then known as ''Mining Journal and Commercial Gazette'', it carried information on a range of subjects, from mines, machinery and metals prices, to news items and stories of general interest. The early issues also provided a glossary of mining terms, updated regularly, and noted all known mine accidents. In 1963, The Mining Journal Ltd took over rival publication '' Mining Magazine'', which had been founded in 1909 by Herbert Hoover, later to become President of the US, while he was a mining engineer then working in London. In 1935, as a centenary edition, it launched '' Minin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lee Moor
Lee may refer to: Name Given name * Lee (given name), a given name in English Surname * Chinese surnames romanized as Li or Lee: ** Li (surname 李) or Lee (Hanzi ), a common Chinese surname ** Li (surname 利) or Lee (Hanzi ), a Chinese surname *Lý (Vietnamese surname) or Lí (李), a common Vietnamese surname * Lee (Korean surname) or Rhee or Yi (Hanja , Hangul or ), a common Korean surname * Lee (English surname), a common English surname * List of people with surname Lee **List of people with surname Li ** List of people with the Korean family name Lee Geography United Kingdom * Lee, Devon * Lee, Hampshire * Lee, London * Lee, Mull, a location in Argyll and Bute * Lee, Northumberland, a location * Lee, Shropshire, a location * Lee-on-the-Solent, Hampshire * Lee District (Metropolis) * The Lee, Buckinghamshire, parish and village name, formally known as Lee * River Lee - alternative name for River Lea United States * Lee, California * Lee, Florida * Lee, Illinoi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smelting
Smelting is a process of applying heat to ore, to extract a base metal. It is a form of extractive metallurgy. It is used to extract many metals from their ores, including silver, iron, copper, and other base metals. Smelting uses heat and a chemical reducing agent to decompose the ore, driving off other elements as gases or slag and leaving the metal base behind. The reducing agent is commonly a fossil fuel source of carbon, such as coke—or, in earlier times, charcoal. The oxygen in the ore binds to carbon at high temperatures due to the lower potential energy of the bonds in carbon dioxide (). Smelting most prominently takes place in a blast furnace to produce pig iron, which is converted into steel. The carbon source acts as a chemical reactant to remove oxygen from the ore, yielding the purified metal element as a product. The carbon source is oxidized in two stages. First, the carbon (C) combusts with oxygen (O2) in the air to produce carbon monoxide (CO). Second, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Tin
Black tin is the raw ore of tin, usually cassiterite, as sold by a tin mine to a smelting company. After mining, the ore must be concentrated by several processes to reduce the amount of gangue it contains before it can be sold. It contrasts with white tin, which is the refined, metallic tin produced after smelting. The term "black tin" was historically associated with tin mining in Devon and Cornwall Cornwall (; kw, Kernow ) is a historic county and ceremonial county in South West England. It is recognised as one of the Celtic nations, and is the homeland of the Cornish people. Cornwall is bordered to the north and west by the Atlantic .... References * * * * Tin mining Mining in Cornwall {{Mining-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sheepstor
Sheepstor is a village, civil parish and former manor on the western side of Dartmoor in the county of Devon, England. In 2001, its population was 53, down from 95 in 1901. For administrative purposes the parish is grouped with the parishes of Meavy and Walkhampton to form Burrator Parish Council, and for electoral purposes it is grouped with the same two parishes to form Burrator Ward. Burrator Reservoir, constructed in 1898, is to the north of the village and forms part of the northern boundary of the parish. The name ''Sheepstor'' has evolved considerably since the first reference to a settlement here which was recorded in a pipe roll of 1168 as ''Sitelestorra''. In a document of 1262, it was ''Skytelestor'', ''Shittestorre'' in 1474, ''Shistor'' in 1547 and in c. 1620 Tristram Risdon called it ''Shetelstor now Shepstor''. The name probably derives from the Old English ''scyttel(s)'' meaning a bar or bolt, reflecting the shape of the nearby Sheeps Tor. Manor The manor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dartmoor Tin-mining
The tin mining industry on Dartmoor, Devon, England, is thought to have originated in pre-Roman times, and continued right through to the 20th century, when the last commercially worked mine (Golden Dagger Mine) closed in November 1930 (though it saw work during the Second World War). From the 12th century onwards tin mining was regulated by a stannary parliament which had its own laws. Tin is smelted from cassiterite, a mineral found in hydrothermal veins in granite, and the uplands of Dartmoor were a particularly productive area. The techniques used for the extraction of tin from Dartmoor followed a progression from streaming through open cast mining to underground mining. Today, there are extensive archaeological remains of these three phases of the industry, as well as of the several stages of processing that were necessary to convert the ore to tin metal. Stannary law Mining became such an important part of life in the region that as early as the 12th century, tin miners ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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