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107-538: The Quincy Mine is an extensive set of copper mines located near Hancock, Michigan . The mine was owned by the Quincy Mining Company and operated between 1846 and 1945, although some activities continued through the 1970s. The Quincy Mine was known as "Old Reliable," as the Quincy Mine Company paid a dividend to investors every year from 1868 through 1920. The Quincy Mining Company Historic District

214-573: A Gilman reagent . These can undergo substitution with alkyl halides to form coupling products ; as such, they are important in the field of organic synthesis . Copper(I) acetylide is highly shock-sensitive but is an intermediate in reactions such as the Cadiot–Chodkiewicz coupling and the Sonogashira coupling . Conjugate addition to enones and carbocupration of alkynes can also be achieved with organocopper compounds. Copper(I) forms

321-399: A balustrade or the top of a pediment . Columns or pilasters , often topped by a pediment, were popular for ornament inside and out, and other ornament was generally geometrical or plant-based, rather than using the human figure. Inside ornament was far more generous, and could sometimes be overwhelming. The chimneypiece continued to be the usual main focus of rooms, and was now given

428-696: A covalent character and are relatively weak. This observation explains the low hardness and high ductility of single crystals of copper. At the macroscopic scale, introduction of extended defects to the crystal lattice , such as grain boundaries, hinders flow of the material under applied stress, thereby increasing its hardness. For this reason, copper is usually supplied in a fine-grained polycrystalline form, which has greater strength than monocrystalline forms. The softness of copper partly explains its high electrical conductivity ( 59.6 × 10   S /m ) and high thermal conductivity, second highest (second only to silver) among pure metals at room temperature. This

535-636: A nickel ) consists of 75% copper and 25% nickel in homogeneous composition. Prior to the introduction of cupronickel, which was widely adopted by countries in the latter half of the 20th century, alloys of copper and silver were also used, with the United States using an alloy of 90% silver and 10% copper until 1965, when circulating silver was removed from all coins with the exception of the half dollar—these were debased to an alloy of 40% silver and 60% copper between 1965 and 1970. The alloy of 90% copper and 10% nickel, remarkable for its resistance to corrosion,

642-407: A pinkish-orange color . Copper is used as a conductor of heat and electricity, as a building material , and as a constituent of various metal alloys , such as sterling silver used in jewelry , cupronickel used to make marine hardware and coins , and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in

749-425: A spin of 3 ⁄ 2 . The other isotopes are radioactive , with the most stable being Cu with a half-life of 61.83 hours. Seven metastable isomers have been characterized; Cu is the longest-lived with a half-life of 3.8 minutes. Isotopes with a mass number above 64 decay by β , whereas those with a mass number below 64 decay by β . Cu , which has

856-420: A suburban compromise between the terraced houses of the city and the detached "villas" further out, where land was cheaper. There had been occasional examples in town centres going back to medieval times. Most early suburban examples are large, and in what are now the outer fringes of Central London, but were then in areas being built up for the first time. Blackheath , Chalk Farm and St John's Wood are among

963-399: A blast furnace. A potential source of copper is polymetallic nodules, which have an estimated concentration 1.3%. Like aluminium , copper is recyclable without any loss of quality, both from raw state and from manufactured products. In volume, copper is the third most recycled metal after iron and aluminium. An estimated 80% of all copper ever mined is still in use today. According to

1070-459: A blue crystalline penta hydrate , the most familiar copper compound in the laboratory. It is used in a fungicide called the Bordeaux mixture . Polyols , compounds containing more than one alcohol functional group , generally interact with cupric salts. For example, copper salts are used to test for reducing sugars . Specifically, using Benedict's reagent and Fehling's solution the presence of

1177-647: A building; such arrangements were only typical in England when housing groups of batchelors, as in Oxbridge colleges, the lawyers in the Inns of Court or the Albany after it was converted in 1802. In the period in question, only in Edinburgh were working-class purpose-built tenements common, though lodgers were common in other cities. A curving crescent , often looking out at gardens or

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1284-442: A classical treatment, and increasingly topped by a painting or a mirror. Plasterwork ceilings, carved wood, and bold schemes of wallpaint formed a backdrop to increasingly rich collections of furniture, paintings, porcelain , mirrors, and objets d'art of all kinds. Wood-panelling, very common since about 1500, fell from favour around the mid-century, and wallpaper included very expensive imports from China. Smaller houses in

1391-413: A decorative vocabulary derived from ancient Rome or Greece. In towns, which expanded greatly during the period, landowners turned into property developers , and rows of identical terraced houses became the norm. Even the wealthy were persuaded to live in these in town, especially if provided with a square of garden in front of the house. There was an enormous amount of building in the period, all over

1498-709: A directly usable metallic form ( native metals ). This led to very early human use in several regions, from c.  8000 BC . Thousands of years later, it was the first metal to be smelted from sulfide ores, c.  5000 BC ; the first metal to be cast into a shape in a mold, c.  4000 BC ; and the first metal to be purposely alloyed with another metal, tin , to create bronze , c.  3500 BC . Commonly encountered compounds are copper(II) salts, which often impart blue or green colors to such minerals as azurite , malachite , and turquoise , and have been used widely and historically as pigments. Copper used in buildings, usually for roofing, oxidizes to form

1605-487: A distance. The height was usually highest in the centre, and the Baroque emphasis on corner pavilions often found on the continent generally avoided. In grand houses, an entrance hall led to steps up to a piano nobile or mezzanine floor where the main reception rooms were. Typically the basement area or "rustic", with kitchens, offices and service areas, as well as male guests with muddy boots, came some way above ground, and

1712-457: A green patina of compounds called verdigris . Copper is sometimes used in decorative art , both in its elemental metal form and in compounds as pigments. Copper compounds are used as bacteriostatic agents , fungicides , and wood preservatives . Copper is essential to all living organisms as a trace dietary mineral because it is a key constituent of the respiratory enzyme complex cytochrome c oxidase . In molluscs and crustaceans , copper

1819-495: A half-life of 12.7 hours, decays both ways. Cu and Cu have significant applications. Cu is used in Cu Cu-PTSM as a radioactive tracer for positron emission tomography . Copper is produced in massive stars and is present in the Earth's crust in a proportion of about 50 parts per million (ppm). In nature, copper occurs in

1926-683: A layer of brown-black copper oxide which, unlike the rust that forms on iron in moist air, protects the underlying metal from further corrosion ( passivation ). A green layer of verdigris (copper carbonate) can often be seen on old copper structures, such as the roofing of many older buildings and the Statue of Liberty . Copper tarnishes when exposed to some sulfur compounds, with which it reacts to form various copper sulfides . There are 29 isotopes of copper. Cu and Cu are stable, with Cu comprising approximately 69% of naturally occurring copper; both have

2033-532: A natural color other than gray or silver. Pure copper is orange-red and acquires a reddish tarnish when exposed to air. This is due to the low plasma frequency of the metal, which lies in the red part of the visible spectrum, causing it to absorb the higher-frequency green and blue colors. As with other metals, if copper is put in contact with another metal in the presence of an electrolyte , galvanic corrosion will occur. Copper does not react with water, but it does slowly react with atmospheric oxygen to form

2140-409: A park, was popular for terraces where space allowed. In early and central schemes of development, plots were sold and built on individually, though there was often an attempt to enforce some uniformity, but as development reached further out schemes were increasingly built as a uniform scheme and then sold. The late Georgian period saw the birth of the semi-detached house, planned systematically, as

2247-407: A red-brown precipitate with copper(II) salts. Compounds that contain a carbon-copper bond are known as organocopper compounds. They are very reactive towards oxygen to form copper(I) oxide and have many uses in chemistry . They are synthesized by treating copper(I) compounds with Grignard reagents , terminal alkynes or organolithium reagents ; in particular, the last reaction described produces

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2354-451: A rich variety of compounds, usually with oxidation states +1 and +2, which are often called cuprous and cupric , respectively. Copper compounds promote or catalyse numerous chemical and biological processes. As with other elements, the simplest compounds of copper are binary compounds, i.e. those containing only two elements, the principal examples being oxides, sulfides, and halides . Both cuprous and cupric oxides are known. Among

2461-652: A sign of their fealty to Britain, and the Georgian style was dominant in the country for most of the first half of the 19th century. The Grange , for example, is a Georgian manor built in Toronto in 1817. In Montreal , English-born architect John Ostell worked on a significant number of remarkable constructions in the Georgian style such as the Old Montreal Custom House and the Grand séminaire de Montréal . In Australia ,

2568-424: A variety of minerals, including native copper , copper sulfides such as chalcopyrite , bornite , digenite , covellite , and chalcocite , copper sulfosalts such as tetrahedite-tennantite , and enargite , copper carbonates such as azurite and malachite , and as copper(I) or copper(II) oxides such as cuprite and tenorite , respectively. The largest mass of elemental copper discovered weighed 420 tonnes and

2675-436: A variety of weak complexes with alkenes and carbon monoxide , especially in the presence of amine ligands. Copper(III) is most often found in oxides. A simple example is potassium cuprate , KCuO 2 , a blue-black solid. The most extensively studied copper(III) compounds are the cuprate superconductors . Yttrium barium copper oxide (YBa 2 Cu 3 O 7 ) consists of both Cu(II) and Cu(III) centres. Like oxide, fluoride

2782-789: Is a United States National Historic Landmark District ; other Quincy Mine properties nearby, including the Quincy Mining Company Stamp Mills , the Quincy Dredge Number Two , and the Quincy Smelter are also historically significant. The Quincy Mine was founded in 1846 by the merger of the Northwest Mining Company and the Portage Mining Company. Due to poor communication between government offices, these two speculative mining companies had purchased

2889-579: Is a constituent of the blood pigment hemocyanin , replaced by the iron-complexed hemoglobin in fish and other vertebrates . In humans, copper is found mainly in the liver, muscle, and bone. The adult body contains between 1.4 and 2.1 mg of copper per kilogram of body weight. In the Roman era , copper was mined principally on Cyprus , the origin of the name of the metal, from aes cyprium (metal of Cyprus), later corrupted to cuprum (Latin). Coper ( Old English ) and copper were derived from this,

2996-405: Is a highly basic anion and is known to stabilize metal ions in high oxidation states. Both copper(III) and even copper(IV) fluorides are known, K 3 CuF 6 and Cs 2 CuF 6 , respectively. Some copper proteins form oxo complexes , which, in extensively studied synthetic analog systems, feature copper(III). With tetrapeptides , purple-colored copper(III) complexes are stabilized by

3103-401: Is because the resistivity to electron transport in metals at room temperature originates primarily from scattering of electrons on thermal vibrations of the lattice, which are relatively weak in a soft metal. The maximum possible current density of copper in open air is approximately 3.1 × 10  A/m , above which it begins to heat excessively. Copper is one of a few metallic elements with

3210-492: Is drained by a large adit , which is the mine tour entrance. The adit, originally five feet high and three feet wide when it was constructed in 1892, was enlarged by Michigan Tech in the 1970s for a mining study. Copper Copper is a chemical element ; it has symbol Cu (from Latin cuprum ) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity . A freshly exposed surface of pure copper has

3317-529: Is melted in a furnace and then reduced and cast into billets and ingots ; lower-purity scrap is refined by electroplating in a bath of sulfuric acid . The environmental cost of copper mining was estimated at 3.7 kg CO2eq per kg of copper in 2019. Codelco, a major producer in Chile, reported that in 2020 the company emitted 2.8t CO2eq per ton (2.8 kg CO2eq per kg) of fine copper. Greenhouse gas emissions primarily arise from electricity consumed by

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3424-444: Is one of the most important constituents of silver and karat gold solders used in the jewelry industry, modifying the color, hardness and melting point of the resulting alloys. Some lead-free solders consist of tin alloyed with a small proportion of copper and other metals. The alloy of copper and nickel , called cupronickel , is used in low-denomination coins, often for the outer cladding. The US five-cent coin (currently called

3531-437: Is recovered from mine tailings and heaps. A variety of methods are used including leaching with sulfuric acid, ammonia, ferric chloride. Biological methods are also used. A significant source of copper is from recycling. Recycling is facilitated because copper is usually deployed in its metallic state. In 2001, a typical automobile contained 20–30 kg of copper. Recycling usually begins with some melting process using

3638-411: Is used for various objects exposed to seawater, though it is vulnerable to the sulfides sometimes found in polluted harbors and estuaries. Alloys of copper with aluminium (about 7%) have a golden color and are used in decorations. Shakudō is a Japanese decorative alloy of copper containing a low percentage of gold, typically 4–10%, that can be patinated to a dark blue or black color. Copper forms

3745-675: The British Geological Survey , in 2005, Chile was the top producer of copper with at least one-third of the world share followed by the United States, Indonesia and Peru. Copper can also be recovered through the in-situ leach process. Several sites in the state of Arizona are considered prime candidates for this method. The amount of copper in use is increasing and the quantity available is barely sufficient to allow all countries to reach developed world levels of usage. An alternative source of copper for collection currently being researched are polymetallic nodules , which are located at

3852-588: The Great Lakes may have also been mining copper during this time, making it one of the oldest known examples of copper extraction in the world. There is evidence from prehistoric lead pollution from lakes in Michigan that people in the region began mining copper c.  6000 BC . Evidence suggests that utilitarian copper objects fell increasingly out of use in the Old Copper Complex of North America during

3959-536: The International Resource Panel 's Metal Stocks in Society report , the global per capita stock of copper in use in society is 35–55 kg. Much of this is in more-developed countries (140–300 kg per capita) rather than less-developed countries (30–40 kg per capita). The process of recycling copper is roughly the same as is used to extract copper but requires fewer steps. High-purity scrap copper

4066-699: The Neolithic period and the Bronze Age was formerly termed the Chalcolithic period (copper-stone), when copper tools were used with stone tools. The term has gradually fallen out of favor because in some parts of the world, the Chalcolithic and Neolithic are coterminous at both ends. Brass, an alloy of copper and zinc, is of much more recent origin. It was known to the Greeks, but became a significant supplement to bronze during

4173-610: The Old Colonial Georgian residential and non-residential styles were developed in the period from c.  1810  – c.  1840 . After about 1840, Georgian conventions were slowly abandoned as a number of revival styles, including Gothic Revival , that had originated in the Georgian period, developed and contested in Victorian architecture , and in the case of Gothic became better researched, and closer to their originals. Neoclassical architecture remained popular, and

4280-555: The Venetian Giacomo Leoni , who spent most of his career in England. Other prominent architects of the early Georgian period include James Paine , Robert Taylor , and John Wood, the Elder . The European Grand Tour became very common for wealthy patrons in the period, and Italian influence remained dominant, though at the start of the period Hanover Square, Westminster (1713 on), developed and occupied by Whig supporters of

4387-579: The Villa Pisani at Montagnana , Italy as depicted in Andrea Palladio 's I quattro libri dell'architettura ("The Four Books of Architecture"). After independence, in the former American colonies , Federal-style architecture represented the equivalent of Regency architecture, with which it had much in common. In Canada , the United Empire Loyalists embraced Georgian architecture as

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4494-521: The Vinča culture date to 4500 BC. Sumerian and Egyptian artifacts of copper and bronze alloys date to 3000 BC. Egyptian Blue , or cuprorivaite (calcium copper silicate) is a synthetic pigment that contains copper and started being used in ancient Egypt around 3250 BC. The manufacturing process of Egyptian blue was known to the Romans, but by the fourth century AD the pigment fell out of use and

4601-468: The classical architecture of Greece and Rome , as revived in Renaissance architecture . Ornament is also normally in the classical tradition, but typically restrained, and sometimes almost completely absent on the exterior. The period brought the vocabulary of classical architecture to smaller and more modest buildings than had been the case before, replacing English vernacular architecture (or becoming

4708-516: The "amygdaloid zones," the upper portions of basalt lava flows. Rock bearing small pockets of copper could be blasted out immediately and processed elsewhere at much lower cost. Amygdaloid mining proved much more productive than fissure mining, and the size and richness of the Pewabic lode in particular allowed the Quincy to produce profits for 53 consecutive years. The Quincy company expanded laterally along

4815-570: The 1720s, overlapping with a more restrained Georgian style. The architect James Gibbs was a transitional figure, his earlier buildings are Baroque, reflecting the time he spent in Rome in the early 18th century, but he adjusted his style after 1720. Major architects to promote the change in direction from Baroque were Colen Campbell , author of the influential book Vitruvius Britannicus (1715–1725); Richard Boyle, 3rd Earl of Burlington and his protégé William Kent ; Isaac Ware ; Henry Flitcroft and

4922-539: The 9th or 10th century AD. Carbon dating has established mining at Alderley Edge in Cheshire , UK, at 2280 to 1890 BC. Ötzi the Iceman , a male dated from 3300 to 3200 BC, was found with an axe with a copper head 99.7% pure; high levels of arsenic in his hair suggest an involvement in copper smelting. Experience with copper has assisted the development of other metals; in particular, copper smelting likely led to

5029-616: The Americas. Unlike the Baroque style that it replaced, which was mostly used for palaces and churches, and had little representation in the British colonies, simpler Georgian styles were widely used by the upper and middle classes. Perhaps the best remaining house is the pristine Hammond-Harwood House (1774) in Annapolis , Maryland , designed by the colonial architect William Buckland and modelled on

5136-512: The Bronze Age and a shift towards an increased production of ornamental copper objects occurred. Natural bronze, a type of copper made from ores rich in silicon, arsenic, and (rarely) tin, came into general use in the Balkans around 5500 BC. Alloying copper with tin to make bronze was first practiced about 4000 years after the discovery of copper smelting, and about 2000 years after "natural bronze" had come into general use. Bronze artifacts from

5243-470: The English-speaking world, and the standards of construction were generally high. Where they have not been demolished, large numbers of Georgian buildings have survived two centuries or more, and they still form large parts of the core of cities such as London , Edinburgh , Dublin , Newcastle upon Tyne and Bristol . The period saw the growth of a distinct and trained architectural profession; before

5350-517: The Georgian period were very often constructed of wood with clapboards; even columns were made of timber, framed up, and turned on an oversized lathe. At the start of the period the difficulties of obtaining and transporting brick or stone made them a common alternative only in the larger cities, or where they were obtainable locally. Dartmouth College , Harvard University and the College of William and Mary offer leading examples of Georgian architecture in

5457-535: The Middle East; a copper pendant was found in northern Iraq that dates to 8700 BC. Evidence suggests that gold and meteoric iron (but not smelted iron) were the only metals used by humans before copper. The history of copper metallurgy is thought to follow this sequence: first, cold working of native copper, then annealing , smelting , and, finally, lost-wax casting . In southeastern Anatolia , all four of these techniques appear more or less simultaneously at

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5564-618: The Roman Empire. Georgian Architecture The Georgian cities of the British Isles were Edinburgh , Bath , pre-independence Dublin , and London , and to a lesser extent York and Bristol . The style was revived in the late 19th century in the United States as Colonial Revival architecture and in the early 20th century in Great Britain as Neo-Georgian architecture ; in both it is also called Georgian Revival architecture . In

5671-449: The United States, the term Georgian is generally used to describe all buildings from the period, regardless of style; in Britain it is generally restricted to buildings that are "architectural in intention", and have stylistic characteristics that are typical of the period, though that covers a wide range. The Georgian style is highly variable, but marked by symmetry and proportion based on

5778-521: The affected areas is highly acidic, with a pH range of 2.1–4.9, and shows elevated electrical conductivity levels between 280 and 1561 mS/cm. These changes in water chemistry make the environment inhospitable for fish, essentially rendering the water uninhabitable for aquatic life. Numerous copper alloys have been formulated, many with important uses. Brass is an alloy of copper and zinc . Bronze usually refers to copper- tin alloys, but can refer to any alloy of copper such as aluminium bronze . Copper

5885-519: The areas contesting being the original home of the semi. Sir John Summerson gave primacy to the Eyre Estate of St John's Wood. A plan for this exists dated 1794, where "the whole development consists of pairs of semi-detached houses , So far as I know, this is the first recorded scheme of the kind". In fact the French Wars put an end to this scheme, but when the development was finally built it retained

5992-531: The atmosphere; 150 mg/kg in soil; 30 mg/kg in vegetation; 2 μg/L in freshwater and 0.5 μg/L in seawater. Most copper is mined or extracted as copper sulfides from large open pit mines in porphyry copper deposits that contain 0.4 to 1.0% copper. Sites include Chuquicamata , in Chile, Bingham Canyon Mine , in Utah, United States, and El Chino Mine , in New Mexico, United States. According to

6099-734: The beginning of the Neolithic c.  7500 BC . Copper smelting was independently invented in different places. The earliest evidence of lost-wax casting copper comes from an amulet found in Mehrgarh , Pakistan, and is dated to 4000 BC. Investment casting was invented in 4500–4000 BC in Southeast Asia Smelting was probably discovered in China before 2800 BC, in Central America around 600 AD, and in West Africa about

6206-532: The buildings and grounds, and provides guided tours of the Number 2 Hoist House and the 7th level of the mine during the summer. Tourists are transported to the 7th level by the Quincy and Torch Lake Cog Railway . There are museum-style exhibits within many buildings. The mine and surrounding areas are part of Keweenaw National Historical Park . Two locomotives of the Quincy & Torch Lake Railroad , which used to transport

6313-479: The classical vocabulary. Where funds permitted, a classical temple portico with columns and a pediment might be used at the west front. Interior decoration was generally chaste; however, walls often became lined with plaques and monuments to the more prosperous members of the congregation. In the colonies new churches were certainly required, and generally repeated similar formulae. British Non-conformist churches were often more classical in mood, and tended not to feel

6420-480: The classically inspired. Public buildings generally varied between the extremes of plain boxes with grid windows and Italian Late Renaissance palaces, depending on budget. Somerset House in London, designed by Sir William Chambers in 1776 for government offices, was as magnificent as any country house, though never quite finished, as funds ran out. Barracks and other less prestigious buildings could be as functional as

6527-527: The company, especially when sourced from fossil fuels, and from engines required for copper extraction and refinement. Companies that mine land often mismanage waste, rendering the area sterile for life. Additionally, nearby rivers and forests are also negatively impacted. The Philippines is an example of a region where land is overexploited by mining companies. Copper mining waste in Valea Şesei, Romania, has significantly altered nearby water properties. The water in

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6634-471: The country, such as vicarages, were simple regular blocks with visible raked roofs, and a central doorway, often the only ornamented area. Similar houses, often referred to as "villas" became common around the fringes of the larger cities, especially London, and detached houses in towns remained common, though only the very rich could afford them in central London. In towns even most better-off people lived in terraced houses, which typically opened straight onto

6741-522: The deprotonated amide ligands. Complexes of copper(III) are also found as intermediates in reactions of organocopper compounds, for example in the Kharasch–Sosnovsky reaction . A timeline of copper illustrates how this metal has advanced human civilization for the past 11,000 years. Copper occurs naturally as native metallic copper and was known to some of the oldest civilizations on record. The history of copper use dates to 9000 BC in

6848-700: The depth is 6,200 feet.) To raise and lower ore and workers into this shaft, the world's largest steam-driven mine hoist was built in 1918 and housed in the Quincy Number 2 Hoist House . The Nordberg Steam Hoist and its reinforced concrete building, built in the Georgian architectural style with brick veneer and Italian-tiled walls, cost over $ 370,000 in 1918 but was used for only eleven years until it ceased usage in 1929. Weighing more than 880 tons, it lifted 10 tons of ore at 36.4 miles per hour, thus saving $ 16,080 in fuel bills in its first year of operation. The hoist sat on

6955-454: The depths of the Pacific Ocean approximately 3000–6500 meters below sea level. These nodules contain other valuable metals such as cobalt and nickel . Copper has been in use for at least 10,000 years, but more than 95% of all copper ever mined and smelted has been extracted since 1900. As with many natural resources, the total amount of copper on Earth is vast, with around 10 tons in

7062-550: The discovery of iron smelting . Production in the Old Copper Complex in Michigan and Wisconsin is dated between 6500 and 3000 BC. A copper spearpoint found in Wisconsin has been dated to 6500 BC. Copper usage by the indigenous peoples of the Old Copper Complex from the Great Lakes region of North America has been radiometrically dated to as far back as 7500 BC. Indigenous peoples of North America around

7169-543: The east coast executives realized that if they offered nicer homes to the workers, the miners were more likely to stay, raise families, and be less likely to leave the area or transfer to another mining company. This strategy proved effective and helped the Quincy Mining Company retain its status as one of the premier mining companies in the region. The Quincy Mining Company closed operations (but did not dissolve) in 1931 due to low copper prices. During World War II ,

7276-404: The extremely similar St. George's Church, Dublin . The 1818 Act allocated some public money for new churches required to reflect changes in population, and a commission to allocate it. Building of Commissioners' churches gathered pace in the 1820s, and continued until the 1850s. The early churches, falling into the Georgian period, show a high proportion of Gothic Revival buildings, along with

7383-545: The fastest water exchange rate (speed of water ligands attaching and detaching) for any transition metal aquo complex . Adding aqueous sodium hydroxide causes the precipitation of light blue solid copper(II) hydroxide . A simplified equation is: Aqueous ammonia results in the same precipitate. Upon adding excess ammonia, the precipitate dissolves, forming tetraamminecopper(II) : Many other oxyanions form complexes; these include copper(II) acetate , copper(II) nitrate , and copper(II) carbonate . Copper(II) sulfate forms

7490-511: The floor above. Often, when a new street or set of streets was developed, the road and pavements were raised up, and the gardens or yards behind the houses remained at a lower level, usually representing the original one. Town terraced houses for all social classes remained resolutely tall and narrow, each dwelling occupying the whole height of the building. This contrasted with well-off continental dwellings, which had already begun to be formed of wide apartments occupying only one or two floors of

7597-554: The lack of symmetry, where Georgian additions were added to earlier structures remaining visible, was deeply felt as a flaw, at least before John Nash began to introduce it in a variety of styles. Regularity of housefronts along a street was a desirable feature of Georgian town planning. Until the start of the Gothic Revival in the early 19th century, Georgian designs usually lay within the Classical orders of architecture and employed

7704-447: The largest concrete slab ever poured, containing 3200 cu. yards of concrete and over 8 tons of reinforcement material. The Number 2 Hoist House was built as a reinforced concrete structure on a scale rare for 1918, making it one of the first of its kind. The very decorative Hoist House was used as a showpiece for visiting investors. The Quincy Mine is now a popular Keweenaw tourist attraction. The Quincy Mine Hoist Association maintains

7811-586: The late 1950s, Bradshaw Gass & Hope 's Police Headquarters in Salford of 1958 being a good example. Architects such as Raymond Erith , and Donald McMorran were among the few architects who continued the neo-Georgian style into the 1960s. Both in the United States and Britain, the Georgian style is still employed by architects like Quinlan Terry , Julian Bicknell , Ben Pentreath , Robert Adam Architects , and Fairfax and Sammons for private residences. A debased form in commercial housing developments, especially in

7918-511: The later spelling first used around 1530. Copper, silver , and gold are in group 11 of the periodic table; these three metals have one s-orbital electron on top of a filled d- electron shell and are characterized by high ductility , and electrical and thermal conductivity. The filled d-shells in these elements contribute little to interatomic interactions, which are dominated by the s-electrons through metallic bonds . Unlike metals with incomplete d-shells, metallic bonds in copper are lacking

8025-419: The level of <1% Cu. Concentration of the ore is required, which begins with comminution followed by froth flotation . The remaining concentrate is the smelted, which can be described with two simplified equations: Cuprous oxide reacts with cuprous sulfide to convert to blister copper upon heating This roasting gives matte copper, roughly 50% Cu by weight, which is purified by electrolysis. Depending on

8132-690: The lode by buying out adjacent properties. The company bought the Pewabic mine in 1891, the Mesnard and the Pontiac in 1897, and the Franklin mine in 1908. This helped the mine survive longer than almost all other Keweenaw copper mining companies, except the Calumet and Hecla Mining Company and the Copper Range Company . To attract a better class of worker, the Quincy Mining Company built and maintained housing for

8239-408: The main nave was generally wider and shorter than in medieval plans, and often there were no side-aisles. Galleries were common in new churches. Especially in country parishes, the external appearance generally retained the familiar signifiers of a Gothic church, with a tower or spire, a large west front with one or more doors, and very large windows along the nave, but all with any ornament drawn from

8346-473: The mid-1760s a range of Neoclassical modes were fashionable, associated with the British architects Robert Adam , James Gibbs, Sir William Chambers , James Wyatt , George Dance the Younger , Henry Holland and Sir John Soane . John Nash was one of the most prolific architects of the late Georgian era known as Regency style , he was responsible for designing large areas of London. Greek Revival architecture

8453-493: The mid-18th century, Georgian styles were assimilated into an architectural vernacular that became part and parcel of the training of every architect , designer , builder , carpenter , mason and plasterer , from Edinburgh to Maryland . Georgian succeeded the English Baroque of Sir Christopher Wren , Sir John Vanbrugh , Thomas Archer , William Talman , and Nicholas Hawksmoor ; this in fact continued into at least

8560-529: The mid-century "the high-sounding title, 'architect' was adopted by anyone who could get away with it". This contrasted with earlier styles, which were primarily disseminated among craftsmen through the direct experience of the apprenticeship system. But most buildings were still designed by builders and landlords together, and the wide spread of Georgian architecture, and the Georgian styles of design more generally, came from dissemination through pattern books and inexpensive suites of engravings . Authors such as

8667-480: The mills and factories that were growing increasingly large by the end of the period. But as the period came to an end many commercial projects were becoming sufficiently large, and well-funded, to become "architectural in intention", rather than having their design left to the lesser class of "surveyors". Georgian architecture was widely disseminated in the English colonies during the Georgian era . American buildings of

8774-455: The mines re-opened due to increased copper demand. When the government stopped supporting copper prices after the war, the mines quickly closed for good. When the mine ceased production in 1945, the Quincy Number 2 shaft was the world's longest mine shaft, at 9,260 feet (2.82 km or 1.75 miles) along the dip of the deposit on a 55 degree decline. (measured vertically from the shaft collar,

8881-605: The mine’s ore to a mill, are located on site: Locomotive #1, the Thomas F. Mason, being a 32-ton 2-6-0 Mogul built by the Brooks Locomotive Works of Dunkirk, New York , and Locomotive #6, the last engine purchased for the line, being a 2-8-0 Consolidation acquired in 1913. The Number 6 Shaft House (no longer standing) is often pictured in photographs as a picturesque example of shaft house architecture. On December 6, 2008 Michigan Tech Associate Professor William J. Gregg

8988-472: The modern world. The price of copper is volatile . After a peak in 2022 the price unexpectedly fell. The global market for copper is one of the most commodified and financialized of the commodity markets , and has been so for decades. The great majority of copper ores are sulfides. Common ores are the sulfides chalcopyrite (CuFeS 2 ), bornite (Cu 5 FeS 4 ) and, to a lesser extent, covellite (CuS) and chalcocite (Cu 2 S). These ores occur at

9095-555: The need for a tower or steeple. The archetypal Georgian church is St Martin-in-the-Fields in London (1720), by Gibbs, who boldly added to the classical temple façade at the west end a large steeple on top of a tower, set back slightly from the main frontage. This formula shocked purists and foreigners, but became accepted and was very widely emulated, at home and in the colonies, for example at St Andrew's Church, Chennai in India. And in Dublin,

9202-473: The new dynasty, seems to have deliberately adopted German stylistic elements in their honour, especially vertical bands connecting the windows. The styles that resulted fall within several categories. In the mainstream of Georgian style were both Palladian architecture —and its whimsical alternatives, Gothic and Chinoiserie , which were the English-speaking world 's equivalent of European Rococo . From

9309-451: The new vernacular style) for almost all new middle-class homes and public buildings by the end of the period. Georgian architecture is characterized by its proportion and balance; simple mathematical ratios were used to determine the height of a window in relation to its width or the shape of a room as a double cube. Regularity, as with ashlar (uniformly cut) stonework, was strongly approved, imbuing symmetry and adherence to classical rules:

9416-516: The numerous copper sulfides , important examples include copper(I) sulfide ( Cu 2 S ) and copper monosulfide ( CuS ). Cuprous halides with fluorine , chlorine , bromine , and iodine are known, as are cupric halides with fluorine , chlorine , and bromine . Attempts to prepare copper(II) iodide yield only copper(I) iodide and iodine. Copper forms coordination complexes with ligands . In aqueous solution, copper(II) exists as [Cu(H 2 O) 6 ] . This complex exhibits

9523-428: The ore, sometimes other metals are obtained during the electrolysis including platinum and gold. Aside from sulfides, another family of ores are oxides. Approximately 15% of the world's copper supply derives from these oxides. The beneficiation process for oxides involves extraction with sulfuric acid solutions followed by electrolysis. In parallel with the above method for "concentrated" sulfide and oxide ores, copper

9630-577: The other materials was more favourable. Raked roofs were mostly covered in earthenware tiles until Richard Pennant, 1st Baron Penrhyn led the development of the slate industry in Wales from the 1760s, which by the end of the century had become the usual material. Versions of revived Palladian architecture dominated English country house architecture. Houses were increasingly placed in grand landscaped settings, and large houses were generally made wide and relatively shallow, largely to look more impressive from

9737-544: The period in Great Britain. Some windows were subsequently bricked-in. Their height increasingly varied between the floors, and they increasingly began below waist-height in the main rooms, making a small balcony desirable. Before this the internal plan and function of the rooms can generally not be deduced from the outside. To open these large windows the sash window , already developed by the 1670s, became very widespread. Corridor plans became universal inside larger houses. Internal courtyards became more rare, except beside

9844-577: The production of the Minesota Mine ) through 1867 (after which it was exceeded by the Calumet and Hecla ). The mine was the first Michigan copper mine to switch from fissure mining to amygdaloid mining, when the recently discovered Pewabic amygdaloid lode was found to cross Quincy property in 1856. High-grade fissure veins contained large, pure masses of copper, but the masses could take days or even months to extract, at high cost. Amygdaloid mining consisted of extracting lower-grade strataform orebodies in

9951-537: The prolific William Halfpenny (active 1723–1755) had editions in America as well as Britain. A similar phenomenon can be seen in the commonality of housing designs in Canada and the United States (though of a wider variety of styles) from the 19th century through the 1950s, using pattern books drawn up by professional architects that were distributed by lumber companies and hardware stores to contractors and homebuilders. From

10058-512: The same period is usually referred to as Neo-Georgian ; the work of Edwin Lutyens and Vincent Harris includes some examples. The British town of Welwyn Garden City , established in the 1920s, is an example of pastiche or Neo-Georgian development of the early 20th century in Britain. Versions of the Neo-Georgian style were commonly used in Britain for certain types of urban architecture until

10165-486: The same tracts of land during the mining rush of the early 1840s. The directors met and decided to merge, with significant investment coming from Massachusetts (the town of Quincy, Massachusetts lent the mine its name). While many other copper mines were founded at the same time, the Quincy Mine became the most successful of the 1840s-era mines, and was the country's leading copper-producing mine from 1863 (when it exceeded

10272-715: The secret to its manufacturing process became lost. The Romans said the blue pigment was made from copper, silica, lime and natron and was known to them as caeruleum . The Bronze Age began in Southeastern Europe around 3700–3300 BC, in Northwestern Europe about 2500 BC. It ended with the beginning of the Iron Age, 2000–1000 BC in the Near East, and 600 BC in Northern Europe. The transition between

10379-536: The semi-detached form, "a revolution of striking significance and far-reaching effect". Until the Church Building Act 1818 , the period saw relatively few churches built in Britain, which was already well-supplied, although in the later years of the period the demand for Non-conformist and Roman Catholic places of worship greatly increased. Anglican churches that were built were designed internally to allow maximum audibility, and visibility, for preaching , so

10486-429: The stables, and the functional parts of the building were placed at the sides, or in separate buildings nearby hidden by trees. The views to and from the front and rear of the main block were concentrated on, with the side approaches usually much less important. The roof was typically invisible from the ground, though domes were sometimes visible in grander buildings. The roofline was generally clear of ornament except for

10593-402: The street, often with a few steps up to the door. There was often an open space, protected by iron railings, dropping down to the basement level, with a discreet entrance down steps off the street for servants and deliveries; this is known as the "area" . This meant that the ground floor front was now removed and protected from the street and encouraged the main reception rooms to move there from

10700-438: The sugar is signaled by a color change from blue Cu(II) to reddish copper(I) oxide. Schweizer's reagent and related complexes with ethylenediamine and other amines dissolve cellulose . Amino acids such as cystine form very stable chelate complexes with copper(II) including in the form of metal-organic biohybrids (MOBs). Many wet-chemical tests for copper ions exist, one involving potassium ferricyanide , which gives

10807-399: The top kilometer of Earth's crust, which is about 5 million years' worth at the current rate of extraction. However, only a tiny fraction of these reserves is economically viable with present-day prices and technologies. Estimates of copper reserves available for mining vary from 25 to 60 years, depending on core assumptions such as the growth rate. Recycling is a major source of copper in

10914-427: The workers. Over the course of operations, the types of housing ranged from simple tents in the early days, to complete three story houses shortly before the mine's shutdown. The executives on the east coast wanted to build more elaborate and fancy homes with amenities such as electricity and running water. However, the on-site managers didn't think it was necessary for the miners to have such high-class dwellings. But

11021-572: Was added to the repertory, beginning around 1750, but increasing in popularity after 1800. Leading exponents were William Wilkins and Robert Smirke . In Britain, brick or stone are almost invariably used; brick is often disguised with stucco . The Georgian terraces of Dublin are noted for their almost uniform use of red brick, for example, whereas equivalent terraces in Edinburgh are constructed from stone. In America and other colonies wood remained very common, as its availability and cost-ratio with

11128-515: Was found in 1857 on the Keweenaw Peninsula in Michigan, US. Native copper is a polycrystal , with the largest single crystal ever described measuring 4.4 × 3.2 × 3.2 cm . Copper is the 26th most abundant element in Earth's crust , representing 50 ppm compared with 75 ppm for zinc , and 14 ppm for lead . Typical background concentrations of copper do not exceed 1 ng/m in

11235-445: Was installing emergency ladders in the mine shaft at the Number 2 Shaft House when he fell 225 feet and landed on an object and was declared dead at the scene by a paramedic who was lowered down to his location. The shafts and stopes of the Quincy Mine have slowly filled with groundwater since the closing of the mine. The water has currently filled the mine up to the seventh level, making all lower levels inaccessible. The seventh level

11342-417: Was lit by windows that were high on the inside, but just above ground level outside. A single block was typical, with perhaps a small court for carriages at the front marked off by railings and a gate, but rarely a stone gatehouse , or side wings around the court. Windows in all types of buildings were large and regularly placed on a grid; this was partly to minimize window tax , which was in force throughout

11449-694: Was the opponent of Gothic in the Battle of the Styles of the early Victorian period. In the United States the Federalist Style contained many elements of Georgian style, but incorporated revolutionary symbols. In the early decades of the twentieth century when there was a growing nostalgia for its sense of order, the style was revived and adapted and in the United States came to be known as the Colonial Revival . The revived Georgian style that emerged in Britain during

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