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Eagle (U.S. Coin)
The eagle was a United States $10 gold coin issued by the United States Mint from 1792 to 1933. The eagle was the largest of the five main decimal base-units of denomination used for circulating coinage in the United States prior to 1933, the year when gold was withdrawn from circulation. These five main base-units of denomination were the mill, the cent, the dime, the dollar, and the eagle, where a cent is 10 mills, a dime is 10 cents, a dollar is 10 dimes, and an eagle is 10 dollars. The eagle base-unit of denomination served as the basis of the quarter eagle ($2.50), half eagle ($5), eagle ($10), and double eagle ($20) coins. With the exceptions of the gold dollar coin, the gold three-dollar coin, the three-cent nickel, and the five-cent nickel, the unit of denomination of coinage prior to 1933 was conceptually linked to the precious or semi-precious metal that constituted a majority of the alloy used in that coin. In this regard the United States followed long-standing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liberty (goddess)
The concept of liberty has frequently been represented by personifications, often loosely shown as a female classical goddess. Examples include Marianne, the national personification of the French Republic and its values of '' Liberté, Égalité, Fraternité'', the female Liberty portrayed on United States coins for well over a century, and many others. These descend from images on ancient Roman coins of the Roman goddess Libertas and from various developments from the Renaissance onwards. The Dutch Maiden was among the first, re-introducing the cap of liberty on a liberty pole featured in many types of image, though not using the Phrygian cap style that became conventional. The 1886 Statue of Liberty (''Liberty Enlightening the World'') by Frédéric Auguste Bartholdi is a well-known example in art, a gift from France to the United States. Ancient Rome The ancient Roman goddess Libertas was honored during the second Punic War (218 to 201 BC) by a temple erected on the Ave ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nickel (United States Coin)
A nickel is a five- cent coin struck by the United States Mint. Composed of cupronickel (75% copper and 25% nickel), the piece has been issued since 1866. Its diameter is 0.835 inches (21.21 mm) and its thickness is 0.077 inches (1.95 mm). The silver half dime, equal to five cents, was issued from 1792 to 1873 before today's cupronickel version. 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 (today the Bureau of Engraving and Printing), placed his own portrait on the denomination. After the successful introduction of two-cent and three-cent pieces without precious metal, Congress also authorized a five-cent piece consisting of base metal; the Mint began striking this version in 1866. The initial design of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gram
The gram (originally gramme; SI unit symbol g) is a Physical unit, unit of mass in the International System of Units (SI) equal to one one thousandth of a kilogram. Originally defined as of 1795 as "the absolute weight of a volume of pure water equal to Cube (algebra), the cube of the hundredth part of a metre [1 Cubic centimetre, cm3], and at Melting point of water, the temperature of Melting point, melting ice", the defining temperature (~0 °C) was later changed to 4 °C, the temperature of maximum density of water. However, by the late 19th century, there was an effort to make the Base unit (measurement), base unit the kilogram and the gram a derived unit. In 1960, the new International System of Units defined a ''gram'' as one one-thousandth of a kilogram (i.e., one gram is Scientific notation, 1×10−3 kg). The kilogram, 2019 redefinition of the SI base units, as of 2019, is defined by the International Bureau of Weights and Measures from the fixed numeric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grain (unit)
A grain is a unit of measurement of mass, and in the troy weight, avoirdupois, and apothecaries' systems, equal to exactly milligrams. It is nominally based upon the mass of a single ideal seed of a cereal. From the Bronze Age into the Renaissance, the average masses of wheat and barley grains were part of the legal definitions of units of mass. Expressions such as "thirty-two grains of wheat, taken from the middle of the ear" appear to have been ritualistic formulas, essentially the premodern equivalent of legal boilerplate. Another source states that it was defined such that 252.458 units would balance of distilled water at an ambient air-water pressure and temperature of and respectively. Another book states that Captain Henry Kater, of the British Standards Commission, arrived at this value experimentally. The grain was the legal foundation of traditional English weight systems, and is the only unit that is equal throughout the troy, avoirdupois, and apothecaries' sys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weight
In science and engineering, the weight of an object is the force acting on the object due to gravity. Some standard textbooks define weight as a Euclidean vector, vector quantity, the gravitational force acting on the object. Others define weight as a scalar quantity, the magnitude of the gravitational force. Yet others define it as the magnitude of the reaction (physics), reaction force exerted on a body by mechanisms that counteract the effects of gravity: the weight is the quantity that is measured by, for example, a spring scale. Thus, in a state of free fall, the weight would be zero. In this sense of weight, terrestrial objects can be weightless: ignoring Drag (physics), air resistance, the famous apple falling from the tree, on its way to meet the ground near Isaac Newton, would be weightless. The unit of measurement for weight is that of force, which in the International System of Units (SI) is the newton (unit), newton. For example, an object with a mass of one kilogram ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crown Gold
Crown gold is a 22 karat (kt) gold alloy used in the crown coin introduced in England in 1526 (by Henry VIII). In this alloy, the proportion of gold is 22 parts out of 24 (91.667% gold)—and is appreciably less prone to wear than the softer 23 kt gold of earlier gold sovereigns—an important point for coins intended for everyday use in circulation. Alloying metal The alloying metal in England was, and is, traditionally restricted to copper. This is still used for the current British gold sovereign. An exception was for the gold sovereigns of 1887, when 1.25% silver, replacing the same weight of copper, was used to gain a better reproduction image of Queen Victoria for the Golden Jubilee of her reign. Elsewhere, both copper and silver have been used in varying proportions. Circulating coins In the United States until 1834, gold circulating coins were minted in 22 kt. crown gold—although using about 6% silver as well as copper. From 1834, the fineness of U.S. coin gold was decr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carat (purity)
The fineness of a precious metal object (coin, bar, jewelry, etc.) represents the weight of ''fine metal'' therein, in proportion to the total weight which includes alloying base metals and any impurities. Alloy metals are added to increase hardness and durability of coins and jewelry, alter colors, decrease the cost per weight, or avoid the cost of high-purity refinement. For example, copper is added to the precious metal silver to make a more durable alloy for use in coins, housewares and jewelry. Coin silver, which was used for making silver coins in the past, contains 90% silver and 10% copper, by mass. Sterling silver contains 92.5% silver and 7.5% of other metals, usually copper, by mass. Various ways of expressing fineness have been used and two remain in common use: ''millesimal fineness'' expressed in units of parts per 1,000 and '' karats'' or ''carats'' used only for gold. Karats measure the parts per 24, so that 18 karat = = 75% and 24 karat gold is considered 100% g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian Head Eagle
The Indian Head eagle is a $10 gold piece or eagle that was struck by the United States Mint continuously from 1907 until 1916, and then irregularly until 1933. The obverse and reverse were designed by sculptor Augustus Saint-Gaudens, originally commissioned for use on other denominations. He was suffering from cancer and did not survive to see the coins released. Beginning in 1904, President Theodore Roosevelt proposed new, more artistic designs on US coins, prompting the Mint to hire Saint-Gaudens to create them. Roosevelt and Saint-Gaudens at first considered a uniform design for the four denominations of coins which were struck in gold, but in 1907 Roosevelt decided to use a model for the obverse of the eagle that the sculptor had meant to use for the cent. For the reverse of the $10 coin, the President decided on a design featuring a standing bald eagle that had been developed for the Saint-Gaudens double eagle $20 coin, while the obverse features a left-facing bust of Libe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Palladium Eagle
The American Palladium Eagle is the official palladium bullion coin of the United States. Each coin has a face value of $25 and is composed of 99.95% fine palladium, with 1 troy ounce actual palladium weight. History The Palladium Eagle was authorized by the American Eagle Palladium Bullion Coin Act of 2010 which became Public Law 111-303 passed during the 111th United States Congress in December 2010 and signed by President Barack Obama. The coin uses Adolph Weinman's obverse design on the Winged Liberty Head "Mercury" dime, Liberty wearing a winged hat, while its reverse design is based on Weinman's 1907 American Institute of Architects (AIA) medal design. The Mint was directed to obtain an independent study of whether there would be enough market demand to justify the issuance of the piece; it voided its first contract for such a study on learning that the contracted firm had ties to the palladium industry. The contract was re-awarded to New York-based CPM Group, which condu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Platinum Eagle
The American Platinum Eagle is the official platinum bullion coin of the United States. In 1995, Director of the United States Mint Philip N. Diehl, American Numismatic Association President David L. Ganz, and Platinum Guild International Executive Director Jacques Luben began the legislative process of creating the Platinum Eagle. After over two years of work, the 99.95% fine platinum coins were released by the United States Mint in , , and 1 troy oz denominations. In late 2008, the fractional denominations were discontinued, leaving only the one ounce denomination. The Platinum Eagle is authorized by the United States Congress, and is backed by the United States Mint for weight, content, and purity. Proof versions of the coins are intended for coin collectors and sold directly to the public whereas the bullion versions are sold only to the Mint's authorized buyers. The proof American Platinum Eagles are unique in the fact that they are the only U.S. bullion coins that have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Gold Eagle
The American Gold Eagle is an official gold bullion coin of the United States. Authorized under the Gold Bullion Coin Act of 1985, it was first released by the United States Mint in 1986. Because the term "eagle" also is the official United States designation for pre-1933 ten dollars gold coins, the weight of the bullion coin is typically used when describing American Gold Eagles (e.g., "1/2-ounce American Gold Eagle") to avoid confusion. This is particularly true with the 1/4-oz American Gold Eagle, which has a marked face value of ten dollars. Details Offered in 1/10 oz, 1/4 oz, 1/2 oz, and 1 oz denominations, these coins are guaranteed by the U.S. government to contain the stated amount of actual gold weight in troy ounces. By law, the gold must come from sources in the United States, alloyed with silver and copper to produce a more wear-resistant coin. In addition, sales of these and other specie coins from the US Mint are mandated, at least in part, to pay off the n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Silver Eagle
The American Silver Eagle is the official silver bullion coin of the United States. It was first released by the United States Mint on November 24, 1986. It is struck only in the one-troy ounce, which has a nominal face value of one dollar and is guaranteed to contain one troy ounce of 99.9% pure silver. It is authorized by Title II of Public Law 99-61 (Liberty Coin Act, approved July 9, 1985) and codified as (e)-(h). Its content, weight, and purity are certified by the United States Mint. In addition to the bullion version, the United States Mint has produced a proof version and an uncirculated version for coin collectors. The Silver Eagle has been produced at three mints: the Philadelphia Mint, the San Francisco Mint, and the West Point Mint. The American Silver Eagle bullion coin may be used to fund Individual Retirement Account investments. Design The design on the coin's obverse was taken from the "Walking Liberty" design by Adolph A. Weinman, which originally had ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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