1.
Coin
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A coin is a small, flat, round piece of metal or plastic used primarily as a medium of exchange or legal tender. They are standardized in weight, and produced in quantities at a mint in order to facilitate trade. They are most often issued by a government, Coins are usually metal or alloy, or sometimes made of synthetic materials. Coins made of metal are stored in large quantities as bullion coins. Other coins are used as money in transactions, circulating alongside banknotes. Usually the highest value coin in circulation is less than the lowest-value note. In the last hundred years, the value of circulation coins has occasionally been lower than the value of the metal they contain. Exceptions to the rule of face value being higher than content value also occur for some bullion coins made of copper, silver, or gold, while the Eagle, Maple Leaf, and Sovereign coins have nominal face values, the Krugerrand does not. The first coins were developed independently in Iron Age Anatolia and Archaic Greece, India, Coins spread rapidly in the 6th and 5th centuries BCE, throughout Greece and Persia, and further to the Balkans. Standardized Roman currency was used throughout the Roman Empire, important Roman gold and silver coins were continued into the Middle Ages. Fiat money first arose in medieval China, with the paper money. Early paper money was introduced in Europe in the later Middle Ages, the penny was minted as a silver coin until the 17th century. The first circulating United States coins were cents, produced in 1793, Coins were an evolution of currency systems of the Late Bronze Age, where standard-sized ingots, and tokens such as knife money, were used to store and transfer value. In the late Chinese Bronze Age, standardized cast tokens were made and these were replicas in bronze of earlier Chinese currency, cowrie shells, so they were named Bronze Shell. According to Aristotle and Pollux, the first issuer of coins was Hermodike of Kyme The earliest coins are associated with Iron Age Anatolia. Early electrum coins were not standardized in weight, and in their earliest stage may have been ritual objects, such as badges or medals, issued by priests. The first Lydian coins were made of electrum, a naturally occurring alloy of silver, most of the early Lydian coins include no writing, only an image of a symbolic animal. Anatolian Artemis was the Πὀτνια Θηρῶν, whose symbol was the stag, a small percentage of early Lydian/Greek coins have a legend
2.
Mint (facility)
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A mint is an industrial facility which manufactures coins that can be used in currency. The history of mints correlates closely with the history of coins, in the beginning, hammered coinage or cast coinage were the chief means of coin minting, with resulting production runs numbering as little as the hundreds or thousands. In modern mints, coin dies are manufactured in large numbers, with the mass production of currency, the production cost is weighed when minting coins. For example, it costs the United States Mint much less than 25 cents to make a quarter, metals were well suited to represent wealth, owing to their great intrinsic value and their durability, divisibility and rarity. The first mint was established in Lydia in the 7th century BC, for coining gold, silver. The Lydian innovation of manufacturing coins under the authority of the spread to neighboring Greece. Some of the earliest Greek mints were within city-states on Greek islands such as Crete, at about the same time, coins and mints appeared independently in China and spread to Korea and Japan. The manufacture of coins in the Roman Empire, dating from about the 4th century BC, the origin of the word mint is ascribed to the manufacture of silver coin at Rome in 269 BC at the temple of Juno Moneta. This goddess became the personification of money, and her name was applied both to money and to its place of manufacture, Roman mints were spread widely across the Empire, and were sometimes used for propaganda purposes. The populace often learned of a new Roman Emperor when coins appeared with the new Emperors portrait, Ancient coins were made by casting in moulds or by striking between engraved dies. The Romans cast their larger copper coins in clay moulds carrying distinctive markings, not because they knew nothing of striking, casting is now used only by counterfeiters. The most ancient coins were cast in bulletshaped or conical moulds, the blank or unmarked piece of metal was placed on a small anvil, and the die was held in position with tongs. The reverse or lower side of the received a rectangular mark made by the sharp edges of the little anvil. Subsequently the anvil was marked in ways, and decorated with letters and figures of beasts. The spherical blanks soon gave place to lenticular-shaped ones, the blank was made red-hot and struck between cold dies. One blow was usually insufficient, and the method was similar to that used in striking medals in high relief. With the substitution of iron for bronze as the material for dies, about 300 AD, in the Middle Ages bars of metal were cast and hammered out on an anvil. Portions of the sheets were then cut out with shears
3.
United States
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Forty-eight of the fifty states and the federal district are contiguous and located in North America between Canada and Mexico. The state of Alaska is in the northwest corner of North America, bordered by Canada to the east, the state of Hawaii is an archipelago in the mid-Pacific Ocean. The U. S. territories are scattered about the Pacific Ocean, the geography, climate and wildlife of the country are extremely diverse. At 3.8 million square miles and with over 324 million people, the United States is the worlds third- or fourth-largest country by area, third-largest by land area. It is one of the worlds most ethnically diverse and multicultural nations, paleo-Indians migrated from Asia to the North American mainland at least 15,000 years ago. European colonization began in the 16th century, the United States emerged from 13 British colonies along the East Coast. Numerous disputes between Great Britain and the following the Seven Years War led to the American Revolution. On July 4,1776, during the course of the American Revolutionary War, the war ended in 1783 with recognition of the independence of the United States by Great Britain, representing the first successful war of independence against a European power. The current constitution was adopted in 1788, after the Articles of Confederation, the first ten amendments, collectively named the Bill of Rights, were ratified in 1791 and designed to guarantee many fundamental civil liberties. During the second half of the 19th century, the American Civil War led to the end of slavery in the country. By the end of century, the United States extended into the Pacific Ocean. The Spanish–American War and World War I confirmed the status as a global military power. The end of the Cold War and the dissolution of the Soviet Union in 1991 left the United States as the sole superpower. The U. S. is a member of the United Nations, World Bank, International Monetary Fund, Organization of American States. The United States is a developed country, with the worlds largest economy by nominal GDP. It ranks highly in several measures of performance, including average wage, human development, per capita GDP. While the U. S. economy is considered post-industrial, characterized by the dominance of services and knowledge economy, the United States is a prominent political and cultural force internationally, and a leader in scientific research and technological innovations. In 1507, the German cartographer Martin Waldseemüller produced a map on which he named the lands of the Western Hemisphere America after the Italian explorer and cartographer Amerigo Vespucci
4.
United States Mint
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The United States Mint produces circulating coinage for the United States to conduct its trade and commerce, as well as controlling the movement of bullion. It does not produce paper money, the Mint was created in Philadelphia in 1792, and soon joined by other centres, whose coins were identified by their own mint marks. There are currently four active coin-producing mints, Philadelphia, Denver, San Francisco, the Mint was created by Congress with the Coinage Act of 1792, and originally placed within the Department of State. Per the terms of the Coinage Act, the first Mint building was in Philadelphia, then the capital of the United States, today, the Mints headquarters are in Washington D. C. It operates mint facilities in Philadelphia, Denver, San Francisco, and West Point, New York and a bullion depository at Fort Knox, Kentucky. Official Mints were once located in Carson City, Nevada, Charlotte, North Carolina, Dahlonega, Georgia, New Orleans, Louisiana, Washington, D. C. and even in Manila. Originally part of the State Department, the Mint was made an independent agency in 1799 and it converted precious metals into standard coin for anyones account with no seigniorage charge beyond the refining costs. Under the Coinage Act of 1873, the Mint became part of the Department of the Treasury and it was placed under the auspices of the Treasurer of the United States in 1981. Legal tender coins of today are minted solely for the Treasurys account, the first Director of the United States Mint was renowned scientist David Rittenhouse from 1792 to 1795. The position was held most recently by Edmund C, moy until his resignation effective January 9,2011. Henry Voigt was the first Superintendent and Chief Coiner, and is credited with some of the first U. S. coin designs. Another important position at the Mint is that of Chief Engraver, the Mint has operated several branch facilities throughout the United States since the Philadelphia Mint opened in 1792, in a building known as Ye Olde Mint. With the opening of branch mints came the need for mint marks, the first of these branch mints were the Charlotte, North Carolina, Dahlonega, Georgia, and New Orleans, Louisiana branches. Both the Charlotte and Dahlonega Mints were opened to facilitate the conversion of gold deposits into coinage. The Civil War closed both these facilities permanently, the New Orleans Mint closed at the beginning of the Civil War and did not re-open until the end of Reconstruction in 1879. During its two stints as a facility, it produced both gold and silver coinage in eleven different denominations, though only ten denominations were ever minted there at one time. A new branch facility was opened in Carson City, Nevada, in 1870, it operated until 1893, like the Charlotte and Dahlonega branches, the Carson City Mint was opened to take advantage of local precious metal deposits, in this case, a large vein of silver. Though gold coins were produced there, no base metal coins were
5.
Dime (United States coin)
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The dime, in U. S. usage, is a ten-cent coin, one tenth of a United States dollar, labeled formally as one dime. The denomination was first authorized by the Coinage Act of 1792, the dime is the smallest in diameter and is the thinnest of all U. S. coins currently minted for circulation, being.705 inches in diameter and.053 inches in thickness. The obverse of the coin depicts the profile of President Franklin D. Roosevelt and the reverse boasts an olive branch, a torch, as of 2011, the dime coin cost 5.65 cents to produce. The word dime comes from the French word dîme, meaning tithe or tenth part, from the Latin decima. In the past prices have occasionally been quoted on signage and other materials in terms of dimes, abbreviated as d or a d with a slash through it as with the cent. The Coinage Act of 1792 established the dime, cent, and mill as subdivisions of the equal to 1⁄10. The first known proposal for a coinage system in the United States was made in 1783 by Thomas Jefferson, Benjamin Franklin, Alexander Hamilton. Hamilton, the nations first Secretary of the Treasury, recommended the issuance of six such coins in 1791, among the six was a silver coin, which shall be, in weight and value, one tenth part of a silver unit or dollar. Thus dimes are made small and thin, with the passage of the Coinage Act of 1965, the dimes silver content was removed. Dimes from 1965 to the present are composed of layers of 75 percent copper and 25 percent nickel. Starting in 1992, the U. S. Mint began issuing Silver Proof Sets annually and these sets are intended solely for collectors, and are not meant for general circulation. Since its introduction in 1796, the dime has been issued in six different major types, the name for each type indicates the design on the coins obverse. The composition of the disme was set at 89.24 percent silver and 10.76 percent copper, in 1792, a limited number of dismes were minted but never circulated. Some of these were struck in copper, indicating that the 1792 dismes were in fact pattern coins, the first dimes minted for circulation did not appear until 1796, due to a lack of demand for the coin and production problems at the United States Mint. The first dime to be circulated was the Draped Bust dime and it featured the same obverse and reverse as all other circulating coins of the time, the so-called Draped Bust/Small Eagle design. This design was the work of then-Chief Engraver Robert Scot, the portrait of Liberty on the obverse was based on a Gilbert Stuart drawing of prominent Philadelphia socialite Ann Willing Bingham, wife of noted American statesman William Bingham. The reverse design is of a bald eagle surrounded by palm and olive branches. Since the Coinage Act of 1792 required only that the cent and half cent display their denomination, all 1796 dimes have 15 stars on the obverse, representing the number of U. S. states then in the Union
6.
Nickel
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Nickel is a chemical element with symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a golden tinge. Nickel belongs to the metals and is hard and ductile. Meteoric nickel is found in combination with iron, a reflection of the origin of elements as major end products of supernova nucleosynthesis. An iron–nickel mixture is thought to compose Earths inner core, use of nickel has been traced as far back as 3500 BCE. Nickel was first isolated and classified as an element in 1751 by Axel Fredrik Cronstedt. The elements name comes from a mischievous sprite of German miner mythology, Nickel, an economically important source of nickel is the iron ore limonite, which often contains 1–2% nickel. Nickels other important ore minerals include garnierite, and pentlandite, major production sites include the Sudbury region in Canada, New Caledonia in the Pacific, and Norilsk in Russia. Nickel is slowly oxidized by air at room temperature and is considered corrosion-resistant, historically, it has been used for plating iron and brass, coating chemistry equipment, and manufacturing certain alloys that retain a high silvery polish, such as German silver. About 6% of world production is still used for corrosion-resistant pure-nickel plating. Nickel-plated objects sometimes provoke nickel allergy, Nickel has been widely used in coins, though its rising price has led to some replacement with cheaper metals in recent years. Nickel is one of four elements that are ferromagnetic around room temperature, alnico permanent magnets based partly on nickel are of intermediate strength between iron-based permanent magnets and rare-earth magnets. The metal is valuable in modern times chiefly in alloys, about 60% of world production is used in nickel-steels, other common alloys and some new superalloys comprise most of the remainder of world nickel use, with chemical uses for nickel compounds consuming less than 3% of production. As a compound, nickel has a number of chemical manufacturing uses. Nickel is a nutrient for some microorganisms and plants that have enzymes with nickel as an active site. Nickel is a metal with a slight golden tinge that takes a high polish. It is one of four elements that are magnetic at or near room temperature. Its Curie temperature is 355 °C, meaning that bulk nickel is non-magnetic above this temperature, the unit cell of nickel is a face-centered cube with the lattice parameter of 0.352 nm, giving an atomic radius of 0.124 nm
7.
Copper
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Copper is a chemical element with symbol Cu and atomic number 29. It is a soft, malleable, and ductile metal with high thermal and electrical conductivity. A freshly exposed surface of copper has a reddish-orange color. Copper is one of the few metals that occur in nature in directly usable metallic form as opposed to needing extraction from an ore and this led to very early human use, from c.8000 BC. Copper used in buildings, usually for roofing, oxidizes to form a green verdigris, Copper is sometimes used in decorative art, both in its elemental metal form and in compounds as pigments. Copper compounds are used as 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 enzyme complex cytochrome c oxidase. In molluscs and crustaceans, copper is a constituent of the blood pigment hemocyanin, replaced by the hemoglobin in fish. In humans, copper is found mainly in the liver, muscle, the adult body contains between 1.4 and 2.1 mg of copper per kilogram of body weight. The filled d-shells in these elements contribute little to interatomic interactions, unlike metals with incomplete d-shells, metallic bonds in copper are lacking 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 supplied in a fine-grained polycrystalline form. The softness of copper partly explains its high conductivity and high thermal conductivity. The maximum permissible current density of copper in open air is approximately 3. 1×106 A/m2 of cross-sectional area, Copper is one of a few metallic elements with a natural color other than gray or silver. Pure copper is orange-red and acquires a reddish tarnish when exposed to air, as with other metals, if copper is put in contact with another metal, galvanic corrosion will occur. A green layer of verdigris can often be seen on old structures, such as the roofing of many older buildings. Copper tarnishes when exposed to sulfur compounds, with which it reacts to form various copper sulfides. There are 29 isotopes of copper, 63Cu and 65Cu are stable, with 63Cu comprising approximately 69% of naturally occurring copper, both have a spin of 3⁄2
8.
Alloy
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An alloy is a mixture of metals or a mixture of a metal and another element. Alloys are defined by a metallic bonding character, an alloy may be a solid solution of metal elements or a mixture of metallic phases. Intermetallic compounds are alloys with a stoichiometry and crystal structure. Zintl phases are sometimes considered alloys depending on bond types. Alloys are used in a variety of applications. In some cases, a combination of metals may reduce the overall cost of the material while preserving important properties, in other cases, the combination of metals imparts synergistic properties to the constituent metal elements such as corrosion resistance or mechanical strength. Examples of alloys are steel, solder, brass, pewter, duralumin, bronze, the alloy constituents are usually measured by mass. Alloys are usually classified as substitutional or interstitial alloys, depending on the arrangement that forms the alloy. They can be classified as homogeneous, or heterogeneous or intermetallic. An alloy is a mixture of elements, which forms an impure substance that retains the characteristics of a metal. Alloys are made by mixing two or more elements, at least one of which is a metal and this is usually called the primary metal or the base metal, and the name of this metal may also be the name of the alloy. The other constituents may or may not be metals but, when mixed with the base, they will be soluble. The mechanical properties of alloys will often be different from those of its individual constituents. A metal that is very soft, such as aluminium, can be altered by alloying it with another soft metal. Although both metals are soft and ductile, the resulting aluminium alloy will have much greater strength. Adding a small amount of carbon to iron trades its great ductility for the greater strength of an alloy called steel. Due to its strength, but still substantial toughness, and its ability to be greatly altered by heat treatment, steel is one of the most useful. By adding chromium to steel, its resistance to corrosion can be enhanced, creating stainless steel, while adding silicon will alter its electrical characteristics, producing silicon steel
9.
Nickel (United States coin)
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A nickel, in American usage, is a five-cent coin struck by the United States Mint. Composed of 75% copper and 25% nickel, the piece has been issued since 1866 and its diameter is.835 inches and its thickness is.077 inches. The silver half dime, equal to five cents, had issued since the 1790s. The American Civil War caused economic hardship, driving gold and silver from circulation, in response, in place of low-value coins, the government at first issued paper currency. In 1865, Congress abolished the five-cent fractional currency note after Spencer M. Clark, head of the Currency Bureau, the initial design of the Shield nickel was struck from 1866 until 1883, then was replaced by the Liberty Head nickel. The Buffalo nickel was introduced in 1913 as part of a drive to increase the beauty of American coinage, in 1938, in 2004 and 2005, special designs in honor of the bicentennial of the Lewis and Clark Expedition were issued. In 2006, the Mint reverted to using Jefferson nickel designer Felix Schlags original reverse, although a new obverse, by Jamie Franki, was substituted. As of the end of FY2013, it cost more than nine cents to produce a nickel, the silver half disme was one of the denominations prescribed by the Mint Act of 1792, its weight and fineness were set by law. By legend, President Washington supplied silverware from his home, Mount Vernon, in 1793, the newly established Philadelphia Mint began striking cents and half cents. Coinage of precious metal was delayed, Congress required the assayer and chief coiner to each post a security bond of $10,000, a huge sum in 1793. In 1794, Congress lowered the chief coiners bond to $5,000, subsequently, silver coinage began that year. The half dime was struck to various designs by Mint Engraver Robert Scot from 1794 until 1805, though none were dated 1798,1799, in response, in 1804 the US stopped striking silver dollars, issuance of the half dime was discontinued from 1805 until 1829. Beginning in 1829, the silver five-cent piece was struck, beginning in 1837. In 1851, it ceased to be the smallest US silver coin as a three cent piece was issued by the Mint, although specie was hoarded or exported, the copper-nickel cent, then the only base metal denomination being struck, also vanished. In 1864, Congress began the process of restoring coins to circulation by abolishing the three-cent note and authorizing bronze cents and two-cent pieces, with low intrinsic values and these new coins initially proved popular, though the two-cent piece soon faded from circulation. On March 3,1865, Congress passed legislation authorizing the Mint to strike three-cent pieces of 75% copper, in 1864, Congress authorized a third series of fractional currency notes. Clark kept his job only because of the intervention of Treasury Secretary Salmon P. Chase. In his 1865 report, Pollock wrote, From this nickel alloy, a coin for the denomination of five cents, only until the resumption of specie payments
10.
Silver
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Silver is a metallic element with symbol Ag and atomic number 47. The symbol Ag stems from Latin argentum, derived from the Greek ὰργὀς, a soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The metal is found in the Earths crust in the pure, free form, as an alloy with gold and other metals. Most silver is produced as a byproduct of copper, gold, lead, Silver is more abundant than gold, but it is much less abundant as a native metal. Its purity is measured on a per mille basis, a 94%-pure alloy is described as 0.940 fine. As one of the seven metals of antiquity, silver has had a role in most human cultures. Silver has long valued as a precious metal. Silver metal is used in many premodern monetary systems in bullion coins, Silver is used in numerous applications other than currency, such as solar panels, water filtration, jewelry, ornaments, high-value tableware and utensils, and as an investment medium. Silver is used industrially in electrical contacts and conductors, in specialized mirrors, window coatings, Silver compounds are used in photographic film and X-rays. Dilute silver nitrate solutions and other compounds are used as disinfectants and microbiocides, added to bandages and wound-dressings, catheters. Silver is similar in its physical and chemical properties to its two neighbours in group 11 of the periodic table, copper and gold. This distinctive electron configuration, with an electron in the highest occupied s subshell over a filled d subshell. Silver is a soft, ductile and malleable transition metal. Silver crystallizes in a cubic lattice with bulk coordination number 12. Unlike metals with incomplete d-shells, metallic bonds in silver are lacking a covalent character and are relatively weak and this observation explains the low hardness and high ductility of single crystals of silver. Silver has a brilliant white metallic luster that can take a polish. Protected silver has greater optical reflectivity than aluminium at all wavelengths longer than ~450 nm, at wavelengths shorter than 450 nm, silvers reflectivity is inferior to that of aluminium and drops to zero near 310 nm. The electrical conductivity of silver is the greatest of all metals, greater even than copper, during World War II in the US,13540 tons of silver were used in electromagnets for enriching uranium, mainly because of the wartime shortage of copper
11.
Half cent (United States coin)
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The half cent is the smallest denomination of United States coin ever minted. It was first minted in 1792 and last minted in 1857 and it was minted in five different appearances. First authorized by the Coinage Act of 1792 on April 2,1792, the half-cent piece was made of 100% copper and was valued at five milles, or one two-hundredth of a dollar. It was slightly smaller than a modern U. S. quarter with diameters 22 mm,23.5 mm and 23 mm. Coinage was discontinued by the Coinage Act of February 21,1857 and they were all produced at the Philadelphia Mint. At the time of their discontinuation, the cent had more buying power than a dime in 2000. Based on the Consumer Price Index, the 2016 value is 14¢, on the 1793 coin and a variety of the 1797 coin, it was lettered TWO HUNDRED FOR A DOLLAR and another 1797 variety had a gripped, or milled, edge. Braided Hair 1840 through 1849 were proof-only issues,1849 -39,8641850 -39,8121851 -147,6721852 - proof only. 1853 -129,6941854 -55,3581855 -56,5001856 -40,4301857 -35,180 Penny, histories, photos, mintages, mints, metal contents, edge designs, designers, and more. Half Cent Pictures This half cent was the first coin donated to the American Numismatic Society The Half Cent Die State Book 1793-1857 by Ronald P. Manley, American Half Cents - The Little Half Sisters by Roger S. Cohen, Jr.1982. Walter Breens Encyclopedia of United States Half Cents 1793-1857 by Walter Breen,1983
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