1.
1830 in art
–
Events from the year 1830 in art. David Wilkie appointed Principal Painter in Ordinary to King William IV of the United Kingdom following the death of Sir Thomas Lawrence, clarkson Stanfields panorama The Military Pass of the Simplon is featured in a Christmas pantomime in London. Edward Lear commences publication of the lithographed Illustrations of the Family of Psittacidae, approximate beginning of the Barbizon school of painters. Agustín Esteve, Spanish portraitist and royal court painter Jean-Baptiste Giraud, French sculptor
2.
Science
–
Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe. The formal sciences are often excluded as they do not depend on empirical observations, disciplines which use science, like engineering and medicine, may also be considered to be applied sciences. However, during the Islamic Golden Age foundations for the method were laid by Ibn al-Haytham in his Book of Optics. In the 17th and 18th centuries, scientists increasingly sought to formulate knowledge in terms of physical laws, over the course of the 19th century, the word science became increasingly associated with the scientific method itself as a disciplined way to study the natural world. It was during this time that scientific disciplines such as biology, chemistry, Science in a broad sense existed before the modern era and in many historical civilizations. Modern science is distinct in its approach and successful in its results, Science in its original sense was a word for a type of knowledge rather than a specialized word for the pursuit of such knowledge. In particular, it was the type of knowledge which people can communicate to each other, for example, knowledge about the working of natural things was gathered long before recorded history and led to the development of complex abstract thought. This is shown by the construction of calendars, techniques for making poisonous plants edible. For this reason, it is claimed these men were the first philosophers in the strict sense and they were mainly speculators or theorists, particularly interested in astronomy. In contrast, trying to use knowledge of nature to imitate nature was seen by scientists as a more appropriate interest for lower class artisans. A clear-cut distinction between formal and empirical science was made by the pre-Socratic philosopher Parmenides, although his work Peri Physeos is a poem, it may be viewed as an epistemological essay on method in natural science. Parmenides ἐὸν may refer to a system or calculus which can describe nature more precisely than natural languages. Physis may be identical to ἐὸν and he criticized the older type of study of physics as too purely speculative and lacking in self-criticism. He was particularly concerned that some of the early physicists treated nature as if it could be assumed that it had no intelligent order, explaining things merely in terms of motion and matter. The study of things had been the realm of mythology and tradition, however. Aristotle later created a less controversial systematic programme of Socratic philosophy which was teleological and he rejected many of the conclusions of earlier scientists. For example, in his physics, the sun goes around the earth, each thing has a formal cause and final cause and a role in the rational cosmic order. Motion and change is described as the actualization of potentials already in things, while the Socratics insisted that philosophy should be used to consider the practical question of the best way to live for a human being, they did not argue for any other types of applied science
3.
Technology
–
Technology is the collection of techniques, skills, methods and processes used in the production of goods or services or in the accomplishment of objectives, such as scientific investigation. Technology can be the knowledge of techniques, processes, and the like, the human species use of technology began with the conversion of natural resources into simple tools. The steady progress of technology has brought weapons of ever-increasing destructive power. It has helped develop more advanced economies and has allowed the rise of a leisure class, many technological processes produce unwanted by-products known as pollution and deplete natural resources to the detriment of Earths environment. Various implementations of technology influence the values of a society and raise new questions of the ethics of technology, examples include the rise of the notion of efficiency in terms of human productivity, and the challenges of bioethics. Philosophical debates have arisen over the use of technology, with disagreements over whether technology improves the condition or worsens it. The use of the technology has changed significantly over the last 200 years. Before the 20th century, the term was uncommon in English, the term was often connected to technical education, as in the Massachusetts Institute of Technology. The term technology rose to prominence in the 20th century in connection with the Second Industrial Revolution, the terms meanings changed in the early 20th century when American social scientists, beginning with Thorstein Veblen, translated ideas from the German concept of Technik into technology. In German and other European languages, a distinction exists between technik and technologie that is absent in English, which translates both terms as technology. By the 1930s, technology referred not only to the study of the industrial arts, dictionaries and scholars have offered a variety of definitions. Ursula Franklin, in her 1989 Real World of Technology lecture, gave another definition of the concept, it is practice, the way we do things around here. The term is used to imply a specific field of technology, or to refer to high technology or just consumer electronics. Bernard Stiegler, in Technics and Time,1, defines technology in two ways, as the pursuit of life by other than life, and as organized inorganic matter. Technology can be most broadly defined as the entities, both material and immaterial, created by the application of mental and physical effort in order to some value. In this usage, technology refers to tools and machines that may be used to solve real-world problems and it is a far-reaching term that may include simple tools, such as a crowbar or wooden spoon, or more complex machines, such as a space station or particle accelerator. Tools and machines need not be material, virtual technology, such as software and business methods. W. Brian Arthur defines technology in a broad way as a means to fulfill a human purpose
4.
Mauritius
–
Mauritius, officially the Republic of Mauritius, is an island nation in the Indian Ocean about 2,000 kilometres off the southeast coast of the African continent. The country includes the islands of Mauritius and Rodrigues, and the outer islands, the islands of Mauritius and Rodrigues form part of the Mascarene Islands, along with nearby Réunion, a French overseas department. The area of the country is 2,040 km², the capital and largest city is Port Louis. Mauritius was a British colonial possession from 1810 to 1968, the year of its independence, the government uses English as the main language. The sovereignty over the Chagos Archipelago is disputed between Mauritius and the United Kingdom, the UK excised the archipelago from Mauritian territory in 1965, three years prior to Mauritian independence. The UK gradually depopulated the archipelagos indigenous population and leased its biggest island, Diego Garcia, access to the archipelago is prohibited to casual tourists, the media, and its former inhabitants. Mauritius also claims sovereignty over Tromelin Island from France, the people of Mauritius are multiethnic, multi-religious, multicultural and multilingual. The islands government is modelled on the Westminster parliamentary system. Along with the other Mascarene Islands, Mauritius is known for its flora and fauna. The island is known as the only known home of the dodo. Mauritius is the country in Africa where Hinduism is the largest religion. The first historical evidence of the existence of an island now known as Mauritius is on a map produced by the Italian cartographer Alberto Cantino in 1502. From this, it appears that Mauritius was first named Dina Arobi around 975 by Arab sailors, in 1507 Portuguese sailors visited the uninhabited island. The island appears with a Portuguese name Cirne on early Portuguese maps, another Portuguese sailor, Dom Pedro Mascarenhas, gave the name Mascarenes to the Archipelago. In 1598 a Dutch squadron under Admiral Wybrand van Warwyck landed at Grand Port and named the island Mauritius, in honour of Prince Maurice van Nassau, later the island became a French colony and was renamed Isle de France. On 3 December 1810 the French surrendered the island to Great Britain during the Napoleonic Wars, under British rule, the islands name reverted to Mauritius /məˈrɪʃəs/. Mauritius is also known as Maurice and Île Maurice in French. The island of Mauritius was uninhabited before its first recorded visit during the Middle Ages by Arab sailors, in 1507 Portuguese sailors came to the uninhabited island and established a visiting base
5.
Charles Bell
–
Sir Charles Bell KH FRS FRSE FRCSE MWS was a Scottish surgeon, anatomist, neurologist, and philosophical theologian. He is noted for discovering the difference between nerves and motor nerves in the spinal cord. He is also noted for describing Bells palsy and his three older brothers included John Bell, also a noted surgeon and writer, and the advocate George Joseph Bell. Charles Bell was born in Edinburgh on 12 November 1774, a son of the Rev William Bell, a clergyman of the Episcopal Church of Scotland, Bell grew up in Edinburgh, attending the High School and Edinburgh University, where he took his medical degree in 1798. He was a member of the Royal Medical Society as a student and he conducted his surgical training as assistant to his elder brother John Bell. He and his brother were artistically gifted, and together they taught anatomy, Bells career was characterized by the accumulation of quite extraordinary honours and achievements - and by acrimonious disputes unusual even by the standards of medicine during the Regency. Shortly after his graduation Bell was admitted to the Royal College of Surgeons in Edinburgh and he and his brother published two additional volumes of their anatomical treatise in 1802 and 1804. Some aspects of his success, however, led to the opposition of local physicians. He then moved to London in 1804, where he set up a private surgery, from 1812 to 1825, together with his brother, Bell ran the Great Windmill Street School of Anatomy, which had been founded by the anatomist William Hunter. Bell was instrumental in the creation of the Middlesex Hospital Medical School, and became, in 1824, in 1829, the Windmill Street School of Anatomy was incorporated into the new Kings College London. Bell was invited to be its first professor of physiology, wishing to return to Scotland, he accepted in 1836 the position of Professor of Surgery at the University of Edinburgh. He was made a Knight of the Royal Guelphic Order in 1833, Bell died at Hallow Park near Worcester in the Midlands, while travelling from Edinburgh to London, in 1842. He is buried in Hallow Churchyard near Worcester, Bell was elected a Fellow of the Royal Society of Edinburgh on 8 June 1807, on the nomination of Robert Jameson, William Wright and Thomas Macknight. He served as a Councillor of the RSE from 1836-9 and he was elected a Fellow of the Royal Society of London on 16 November 1826, was knighted in 1831 and, like Sir Richard Owen, was elected a foreign member of the Royal Swedish Academy of Sciences. Charles Bell was a prolific author, after the failure of his application, Bell turned his attentions to the nervous system. Bell published detailed studies of the system in 1811, in his privately circulated book An Idea of a New Anatomy of the Brain. He described his experiments with animals and later emphasised how he was the first to distinguish between sensory and motor nerves and this essay is considered by many to be the founding stone of clinical neurology. Darwin detailed these opinions in his The Expression of the Emotions in Man and Animals, Bell was one of the first physicians to combine the scientific study of neuroanatomy with clinical practice
6.
HMS Beagle
–
HMS Beagle was a Cherokee-class 10-gun brig-sloop of the Royal Navy, one of more than 100 ships of this class. The vessel, constructed at a cost of £7,803, was launched on 11 May 1820 from the Woolwich Dockyard on the River Thames, there was no immediate need for Beagle so she lay in ordinary, moored afloat but without masts or rigging. She was then adapted as a barque and took part in three survey expeditions. The Cherokee-class of 10-gun brig-sloops was designed by Sir Henry Peake in 1807, the Beagles keel was laid in June 1818, construction cost £7,803, and the ship was launched on 11 May 1820. In July of that year she took part in a review on the River Thames. Captain Pringle Stokes was appointed captain of Beagle on 7 September 1825, on 27 September 1825 Beagle docked at Woolwich to be repaired and fitted out for her new duties. Her guns were reduced from ten cannon to six and a mizzen mast was added to improve her handling, Beagle set sail from Plymouth on 22 May 1826 on her first voyage, under the command of Captain Stokes. Faced with the difficult part of the survey in the desolate waters of Tierra del Fuego. At Port Famine on the Strait of Magellan he locked himself in his cabin for 14 days, then after getting over-excited and talking of preparing for the next cruise, shot himself on 2 August 1828. Following four days of delirium Stokes recovered slightly, but then his condition deteriorated, Captain Parker King then replaced Stokes with the First Lieutenant of the Beagle, Lieutenant W. G. Skyring as commander, and both ships sailed to Montevideo. On 13 October King sailed the Adventure to Rio de Janeiro for refitting, when the Beagle arrived, Otway put the ship under the command of his aide, Flag Lieutenant Robert FitzRoy. The 23-year-old aristocrat FitzRoy proved an able commander and meticulous surveyor, in one incident a group of Fuegians stole a ships boat, and FitzRoy took their families on board as hostages. Eventually he held two men, a girl and a boy, who was given the name of Jemmy Button, during this survey, the Beagle Channel was identified and named after the ship. A kind uncle heard of this and contacted the Admiralty, soon afterwards FitzRoy heard that he was to be appointed commander of HMS Chanticleer to go to Tierra del Fuego, but due to her poor condition Beagle was substituted for the voyage. FitzRoy was re-appointed as commander on 27 June 1831 and the Beagle was commissioned on 4 July 1831 under his command, with Lieutenants John Clements Wickham, Beagle was immediately taken into dock at Devonport for extensive rebuilding and refitting. As she required a new deck, FitzRoy had the upper-deck raised considerably, the Cherokee-class ships had the reputation of being coffin brigs, which handled badly and were prone to sinking. Additional sheathing added to the hull added about seven tons to her burthen, the ship was one of the first to be fitted with the lightning conductor invented by William Snow Harris. To reduce magnetic interference with the instruments, FitzRoy proposed replacing the iron guns with brass guns
7.
Tierra del Fuego
–
Tierra del Fuego is an archipelago off the southernmost tip of the South American mainland, across the Strait of Magellan. The archipelago consists of the island, Isla Grande de Tierra del Fuego, with an area of 48,100 km2. Tierra del Fuego is divided between Chile and Argentina, with the controlling the eastern half of the main island. The southernmost extent of the archipelago is at about latitude 55 S, the earliest known human settlement in Tierra del Fuego dates to around 8,000 B. C. Europeans first explored the islands during Ferdinand Magellans expedition of 1520, Tierra del Fuego, today, petroleum extraction dominates economic activity in the north of Tierra del Fuego, while tourism, manufacturing, and Antarctic logistics are important in the south. The earliest human settlement occurred around 8,000 B. C, the Yaghan were some of the earliest known humans to settle in Tierra del Fuego. Archeological sites with characteristics of their culture have found at locations such as Navarino Island. The name Tierra del Fuego derives from the Portuguese explorer Ferdinand Magellan, sailing for the Spanish Crown and he believed he was seeing the many fires of the Yaghan, which were visible from the sea, and that the Indians were waiting in the forests to ambush his armada. In 1525 Francisco de Hoces was the first to speculate that Tierra del Fuego was one or more islands rather than part of what was then called Terra Australis, francis Drake in 1578 and a Dutch VOC expedition in 1616 learned more about the geography. The latter expedition named Cape Horn, on his first voyage with the HMS Beagle in 1830, Robert FitzRoy picked up four native Fuegians, including Jemmy Button and brought them to England. The surviving three were taken to London to meet the King and Queen and were, for a time and they returned to Tierra del Fuego in the Beagle with FitzRoy and Charles Darwin, who made extensive notes about his visit to the islands. During the second half of the 19th century, the archipelago began to come under Chilean, both countries sought to claim the whole archipelago based on de jure Spanish colonial titles. Salesian Catholic missions were established in Río Grande and Dawson Island, anglican missions were established by British colonists at Keppel Island in the Falklands in 1855 and in 1870 at Ushuaia on the main island, which continued to operate through the 19th century. Thomas Bridges learned the language and compiled a 30, 000-word Yaghan grammar and it was published in the 20th century and considered an important ethnological work. An 1879 Chilean expedition led by Ramón Serrano Montaner reported large amounts of gold in the streams. This prompted massive immigration to the island between 1883 and 1909. Numerous Argentines, Chileans and Croatians settled in the main island, julius Popper, a Romanian explorer, was one of the most successful entrepreneurs in the region. Granted rights by the Argentine government to exploit any gold deposits he found in Tierra del Fuego, despite the missionaries efforts, many natives died
8.
Charles Lyell
–
Sir Charles Lyell, 1st Baronet, FRS was a British lawyer and the foremost geologist of his day. Principles of Geology also challenged theories popularized by Georges Cuvier, which were the most accepted and circulated ideas about geology in England at the time and he also coined the currently-used names for geological eras, Paleozoic, Mesozoic and Cenozoic. He incorrectly conjectured that icebergs may be the emphasis behind the transport of glacial erratics, Lyell was one of the first to believe that the world is older than 300 million years, on the basis of its geological anomalies. He was a friend of Charles Darwin, and contributed significantly to Darwins thinking on the processes involved in evolution. He helped to arrange the publication in 1858 of papers by Darwin and Alfred Russel Wallace on natural selection. He later published evidence from geology of the man had existed on Earth. Lyell was born 14 November 1797 in Scotland about 15 miles north of Dundee in Kinnordy and he was the eldest of ten children. Lyells father, also named Charles Lyell, was a lawyer and botanist of minor repute, the house/place of his birth is located in the north-west of the Central Lowlands in the valley of the Highland Boundary Fault. Round the house, in the valley, is farmland. His familys second home was in a different geological and ecological area, he spent much of his childhood at Bartley Lodge in the New Forest. Lyell entered Exeter College, Oxford, in 1816, and attended William Bucklands lectures and he graduated BA second class in classics, December 1819, and M. A.1821. After graduation he took up law as a profession, entering Lincolns Inn in 1820 and he completed a circuit through rural England, where he could observe geological phenomena. In 1821 he attended Robert Jamesons lectures in Edinburgh, and visited Gideon Mantell at Lewes, in 1823 he was elected joint secretary of the Geological Society. As his eyesight began to deteriorate, he turned to geology as a full-time profession and his first paper, On a recent formation of freshwater limestone in Forfarshire, was presented in 1822. In 1832, Lyell married Mary Horner in Bonn, daughter of Leonard Horner, the new couple spent their honeymoon in Switzerland and Italy on a geological tour of the area. During the 1840s, Lyell travelled to the United States and Canada, after the Great Chicago Fire, Lyell was one of the first to donate books to help found the Chicago Public Library. In 1866, he was elected a member of the Royal Swedish Academy of Sciences. Lyells wife died in 1873, and two years later Lyell himself died as he was revising the twelfth edition of Principles and he is buried in Westminster Abbey
9.
London
–
London /ˈlʌndən/ is the capital and most populous city of England and the United Kingdom. Standing on the River Thames in the south east of the island of Great Britain and it was founded by the Romans, who named it Londinium. Londons ancient core, the City of London, largely retains its 1. 12-square-mile medieval boundaries. London is a global city in the arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism. It is crowned as the worlds largest financial centre and has the fifth- or sixth-largest metropolitan area GDP in the world, London is a world cultural capital. It is the worlds most-visited city as measured by international arrivals and has the worlds largest city airport system measured by passenger traffic, London is the worlds leading investment destination, hosting more international retailers and ultra high-net-worth individuals than any other city. Londons universities form the largest concentration of education institutes in Europe. In 2012, London became the first city to have hosted the modern Summer Olympic Games three times, London has a diverse range of people and cultures, and more than 300 languages are spoken in the region. Its estimated mid-2015 municipal population was 8,673,713, the largest of any city in the European Union, Londons urban area is the second most populous in the EU, after Paris, with 9,787,426 inhabitants at the 2011 census. The citys metropolitan area is the most populous in the EU with 13,879,757 inhabitants, the city-region therefore has a similar land area and population to that of the New York metropolitan area. London was the worlds most populous city from around 1831 to 1925, Other famous landmarks include Buckingham Palace, the London Eye, Piccadilly Circus, St Pauls Cathedral, Tower Bridge, Trafalgar Square, and The Shard. The London Underground is the oldest underground railway network in the world, the etymology of London is uncertain. It is an ancient name, found in sources from the 2nd century and it is recorded c.121 as Londinium, which points to Romano-British origin, and hand-written Roman tablets recovered in the city originating from AD 65/70-80 include the word Londinio. The earliest attempted explanation, now disregarded, is attributed to Geoffrey of Monmouth in Historia Regum Britanniae and this had it that the name originated from a supposed King Lud, who had allegedly taken over the city and named it Kaerlud. From 1898, it was accepted that the name was of Celtic origin and meant place belonging to a man called *Londinos. The ultimate difficulty lies in reconciling the Latin form Londinium with the modern Welsh Llundain, which should demand a form *lōndinion, from earlier *loundiniom. The possibility cannot be ruled out that the Welsh name was borrowed back in from English at a later date, and thus cannot be used as a basis from which to reconstruct the original name. Until 1889, the name London officially applied only to the City of London, two recent discoveries indicate probable very early settlements near the Thames in the London area
10.
United States
–
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
11.
Rack railway
–
A rack railway is a steep grade railway with a toothed rack rail, usually between the running rails. The trains are fitted with one or more cog wheels or pinions that mesh with this rack rail and this allows the trains to operate on steep grades above around 7 to 10%, which is the maximum for friction-based rail. Most rack railways are mountain railways, although a few are transit railways or tramways built to overcome a steep gradient in an urban environment. The first cog railway was the Middleton Railway between Middleton and Leeds in West Yorkshire, England, UK, where the first commercially successful steam locomotive, Salamanca and this used a rack and pinion system designed and patented in 1811 by John Blenkinsop. The first mountain cog railway was the Mount Washington Cog Railway in the US state of New Hampshire, the track was completed to reach the summit of Mount Washington in 1869. The first mountain railway in continental Europe was the Vitznau-Rigi-Bahn on Mount Rigi in Switzerland. A number of different rack systems have been developed, today, the majority of rack railways use the Abt system. Blenkinsops system remained in use for 25 years on the Middleton Railway, Rack systems place the rack rail halfway between the running rails, with the exception of some early Morgan rack installations. The first successful rack railway in the US was the Mount Washington Cog Railway, the first public trial of the Marsh rack on Mount Washington was made on August 29,1866, when only one quarter of a mile of track had been completed. The Mount Washington railway opened to the public on August 14,1868, the Riggenbach rack system was invented by Niklaus Riggenbach working at about the same time as, but independently from Marsh. Riggenbach was granted a French patent in 1863 based on a model which he used to interest potential Swiss backers. During this time, the Swiss Consul to the United States visited Marshs Mount Washington Cog Railway, eager to boost tourism in Switzerland, the government commissioned Riggenbach to build a rack railway up Rigi Mountain. Following the construction of a locomotive and test track in a quarry near Bern. The Riggenbach system is similar in design to the Marsh system and it uses a ladder rack, formed of steel plates or channels connected by round or square rods at regular intervals. The Riggenbach system suffers from the problem that its fixed ladder rack is more complex, following the success of the Vitznau-Rigi-Bahn, Riggenbach established the Maschinenfabrik der Internationalen Gesellschaft für Bergbahnen - a company that produced rack locomotives to his design. The Strub rack system was invented by Emil Strub in 1896 and it uses a rolled flat-bottom rail with rack teeth machined into the head approximately 100 mm apart. Safety jaws fitted to the locomotive engage with the underside of the head to prevent derailments, strubs US Patent, granted in 1898, also includes details of how the rack rail is integrated with the mechanism of a turnout. The best-known use of the Strub system is on the Jungfraubahn in Switzerland and it is the simplest rack system to maintain and has become increasingly popular
12.
United Kingdom
–
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom or Britain, is a sovereign country in western Europe. Lying off the north-western coast of the European mainland, the United Kingdom includes the island of Great Britain, Northern Ireland is the only part of the United Kingdom that shares a land border with another sovereign state—the Republic of Ireland. The Irish Sea lies between Great Britain and Ireland, with an area of 242,500 square kilometres, the United Kingdom is the 78th-largest sovereign state in the world and the 11th-largest in Europe. It is also the 21st-most populous country, with an estimated 65.1 million inhabitants, together, this makes it the fourth-most densely populated country in the European Union. The United Kingdom is a monarchy with a parliamentary system of governance. The monarch is Queen Elizabeth II, who has reigned since 6 February 1952, other major urban areas in the United Kingdom include the regions of Birmingham, Leeds, Glasgow, Liverpool and Manchester. The United Kingdom consists of four countries—England, Scotland, Wales, the last three have devolved administrations, each with varying powers, based in their capitals, Edinburgh, Cardiff and Belfast, respectively. The relationships among the countries of the UK have changed over time, Wales was annexed by the Kingdom of England under the Laws in Wales Acts 1535 and 1542. A treaty between England and Scotland resulted in 1707 in a unified Kingdom of Great Britain, which merged in 1801 with the Kingdom of Ireland to form the United Kingdom of Great Britain and Ireland. Five-sixths of Ireland seceded from the UK in 1922, leaving the present formulation of the United Kingdom of Great Britain, there are fourteen British Overseas Territories. These are the remnants of the British Empire which, at its height in the 1920s, British influence can be observed in the language, culture and legal systems of many of its former colonies. The United Kingdom is a country and has the worlds fifth-largest economy by nominal GDP. The UK is considered to have an economy and is categorised as very high in the Human Development Index. It was the worlds first industrialised country and the worlds foremost power during the 19th, the UK remains a great power with considerable economic, cultural, military, scientific and political influence internationally. It is a nuclear weapons state and its military expenditure ranks fourth or fifth in the world. The UK has been a permanent member of the United Nations Security Council since its first session in 1946 and it has been a leading member state of the EU and its predecessor, the European Economic Community, since 1973. However, on 23 June 2016, a referendum on the UKs membership of the EU resulted in a decision to leave. The Acts of Union 1800 united the Kingdom of Great Britain, Scotland, Wales and Northern Ireland have devolved self-government
