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Silver Coins
Silver coins are considered the oldest mass-produced form of coinage. Silver has been used as a coinage metal since the times of the Greeks; their silver drachmas were popular trade coins. The ancient Persians used silver coins between 612–330 BC. Before 1797, British pennies were made of silver. As with all collectible coins, many factors determine the value of a silver coin, such as its rarity, demand, condition and the number originally minted. Ancient silver coins coveted by collectors include the Denarius and Miliarense, while more recent collectible silver coins include the Morgan Dollar and the Spanish Milled Dollar. Other than collector's silver coins, silver bullion coins are popular among people who desire a "hedge" against currency inflation or store of value. Silver has an international currency symbol of XAG under ISO 4217. Origins and early development of silver coins The earliest coins in the world were minted in the kingdom of Lydia in Asia Minor around 600 B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1. In conventions of sign where zero is considered neither positive nor negative, 1 is the first and smallest positive integer. It is also sometimes considered the first of the infinite sequence of natural numbers, followed by 2, although by other definitions 1 is the second natural number, following 0. The fundamental mathematical property of 1 is to be a multiplicative identity, meaning that any number multiplied by 1 equals the same number. Most if not all properties of 1 can be deduced from this. In advanced mathematics, a multiplicative identity is often denoted 1, even if it is not a number. 1 is by convention not considered a prime number; this was not universally accepted until the mid-20th century. Additionally, 1 is the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BMC 193
BMC may refer to: Business and organizations * Beard Miller Company, a US public accounting firm * BioMed Central, a UK-based scientific publisher * BMC Software, an American business service management software vendor * BMC Switzerland, a Swiss bicycle products manufacturer and sponsor of professional cycling * BMC (Turkey), a Turkish vehicle manufacturer * Boston Micromachines Corporation, a manufacturer of microelectromechanical deformable mirrors * Brega Marketing Company, a Libyan company for marketing petroleum and related products * British Motor Corporation, a UK vehicle company ** British Motor Corporation (Australia), the Australian arm of the British Motor Corporation * British Mountaineering Council * Bulk mail center * Burma Muslim Congress, a former political party in Myanmar * Business Model Canvas a canvas diagram invented by Alexander Osterwalder * Buy Me a Coffee, an American crowdfunding company Education * Bangalore Medical College * Belfast Metropolitan College ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bronze
Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (including aluminium, manganese, nickel, or zinc) and sometimes non-metals, such as phosphorus, or metalloids such as arsenic or silicon. These additions produce a range of alloys that may be harder than copper alone, or have other useful properties, such as ultimate tensile strength, strength, ductility, or machinability. The three-age system, archaeological period in which bronze was the hardest metal in widespread use is known as the Bronze Age. The beginning of the Bronze Age in western Eurasia and India is conventionally dated to the mid-4th millennium BCE (~3500 BCE), and to the early 2nd millennium BCE in China; elsewhere it gradually spread across regions. The Bronze Age was followed by the Iron Age starting from about 1300 BCE and reaching most of Eurasia by about 500 BCE, although bronze continued to be much more widely used than it is in mod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chinese Coins
Ancient Chinese coinage includes some of the earliest known coins. These coins, used as early as the Spring and Autumn period (770–476 BCE), took the form of imitations of the cowrie shells that were used in ceremonial exchanges. The same period also saw the introduction of the first metal coins; however, they were not initially round, instead being either knife shaped or spade shaped. Round metal coins with a round, and then later square hole in the center were first introduced around 350 BCE. The beginning of the Qin dynasty (221–206 BCE), the first dynasty to unify China, saw the introduction of a standardised coinage for the whole Empire. Subsequent dynasties produced variations on these round coins throughout the imperial period. At first the distribution of the coinage was limited to use around the capital city district, but by the beginning of the Han dynasty, coins were widely used for such things as paying taxes, salaries and fines. Ancient Chin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. Covering an area of approximately , it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the most populous city and financial center is Shanghai. Modern Chinese trace their origins to a cradle of civilization in the fertile basin of the Yellow River in the North China Plain. The semi-legendary Xia dynasty in the 21st century BCE and the well-attested Shang and Zhou dynasties developed a bureaucratic political system to serve hereditary monarchies, or dyna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Obolus
The obol ( grc-gre, , ''obolos'', also ὀβελός (''obelós''), ὀβελλός (''obellós''), ὀδελός (''odelós''). "nail, metal spit"; la, obolus) was a form of ancient Greek currency and weight. Currency Obols were used from early times. According to Plutarch they were originally spits of copper or bronze traded by weight, while six obols make a drachma or a handful, since that was as many as the hand could grasp. Heraklides of Pontus (died ca. 310 BC) is cited as having mentioned the obols of Heraion and also gives the etymology of ''obolos'' (the name of the coin) from ''obelos'' (the word for "spit, spike, nail"). Similarly, the historian Ephorus in his equally lost work ''On Inventions'' (mid 4th century BC) is said to have mentioned the obols of Heraion. Excavations at Argos discovered several dozen of these early obols, dated well before 800 BC; they are now displayed at the Numismatic Museum of Athens. Archaeologists today describe the iro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drachma
The drachma ( el, δραχμή , ; pl. ''drachmae'' or ''drachmas'') was the currency used in Greece during several periods in its history: # An ancient Greek currency unit issued by many Greek city states during a period of ten centuries, from the Archaic period throughout the Classical period, the Hellenistic period up to the Roman period under Greek Imperial Coinage. # Three modern Greek currencies, the first introduced in 1832 by the Greek King Otto () and the last replaced by the euro in 2001 (at the rate of 340.75 drachmae to the euro). The euro did not begin circulating until 2001 but the exchange rate was fixed on 19 June 2000, with legal introduction of the euro taking place in January 2002. It was also a small unit of weight.. Ancient drachma The name ''drachma'' is derived from the verb (, "(I) grasp"). It is believed that the same word with the meaning of "handful" or "handle" is found in Linear B tablets of the Mycenean Pylos. Initially a drachma was a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stater
The stater (; grc, , , statḗr, weight) was an ancient coin used in various regions of Ancient Greece, Greece. The term is also used for similar coins, imitating Greek staters, minted elsewhere in ancient Europe. History The stater, as a Greek silver currency, first as ingots, and later as coins, circulated from the 8th century BC to AD 50. The earliest known stamped stater (having the mark of some authority in the form of a picture or words) is an electrum turtle coin, struck at Aegina that dates to about 650 BC. It is on display at the Bibliothèque Nationale in Paris. According to Robin Lane Fox, the stater as a weight unit was borrowed by the Euboean stater weighing from the Phoenician shekel, which had about the same weight as a stater () and was also one fiftieth of a Mina (unit), mina.Lane Fox, Robin. ''Travelling Heroes: Greeks and Their Myths in the Epic Age of Homer''. P. 94. London: Allen Lane, 2008. The silver stater minted at CorinthSmith, William ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mediterranean Sea
The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the east by the Levant. The Sea has played a central role in the history of Western civilization. Geological evidence indicates that around 5.9 million years ago, the Mediterranean was cut off from the Atlantic and was partly or completely desiccated over a period of some 600,000 years during the Messinian salinity crisis before being refilled by the Zanclean flood about 5.3 million years ago. The Mediterranean Sea covers an area of about , representing 0.7% of the global ocean surface, but its connection to the Atlantic via the Strait of Gibraltar—the narrow strait that connects the Atlantic Ocean to the Mediterranean Sea and separates the Iberian Peninsula in Europe from Morocco in Africa—is only wide. The Mediterranean Sea e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colonies
In modern parlance, a colony is a territory subject to a form of foreign rule. Though dominated by the foreign colonizers, colonies remain separate from the administration of the original country of the colonizers, the '' metropolitan state'' (or "mother country"). This administrative colonial separation makes colonies neither incorporated territories nor client states. Some colonies have been organized either as dependent territories that are not sufficiently self-governed, or as self-governed colonies controlled by colonial settlers. The term colony originates from the ancient Roman '' colonia'', a type of Roman settlement. Derived from ''colon-us'' (farmer, cultivator, planter, or settler), it carries with it the sense of 'farm' and 'landed estate'. Furthermore the term was used to refer to the older Greek ''apoikia'' (), which were overseas settlements by ancient Greek city-states. The city that founded such a settlement became known as its ''metropolis'' ("mother-city ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aegina
Aegina (; el, Αίγινα, ''Aígina'' ; grc, Αἴγῑνα) is one of the Saronic Islands of Greece in the Saronic Gulf, from Athens. Tradition derives the name from Aegina (mythology), Aegina, the mother of the hero Aeacus, who was born on the island and became its king. Administration Municipality The municipality of Aegina consists of the island of Aegina and a few offshore islets. It is part of the Islands (regional unit), Islands regional unit, Attica (region), Attica region. The municipality is subdivided into the following five communities (population in 2011 in parentheses ): * Kypseli (2124) * Mesagros (1361) * Perdika (823) * Vathy (1495) The regional capital is the town of Aegina, situated at the northwestern end of the island. Due to its proximity to Athens, it is a popular vacation place during the summer months, with quite a few Athenians owning second houses on the island. Province The province of Aegina ( el, Επαρχία Αίγινας) was one of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alloy
An alloy is a mixture of chemical elements of which at least one is a metal. Unlike chemical compounds with metallic bases, an alloy will retain all the properties of a metal in the resulting material, such as electrical conductivity, ductility, opacity (optics), opacity, and lustre (mineralogy), luster, but may have properties that differ from those of the pure metals, such as increased strength or hardness. In some cases, an alloy may reduce the overall cost of the material while preserving important properties. In other cases, the mixture imparts synergistic properties to the constituent metal elements such as corrosion resistance or mechanical strength. Alloys are defined by a metallic bonding character. The alloy constituents are usually measured by mass percentage for practical applications, and in Atomic ratio, atomic fraction for basic science studies. Alloys are usually classified as substitutional or interstitial alloys, depending on the atomic arrangement that forms the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
