1.
United States Capitol
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The United States Capitol, often called the Capitol Building or Capitol Hill, is the home of the United States Congress, and the seat of the legislative branch of the U. S. federal government. It sits atop Capitol Hill at the end of the National Mall in Washington. Though not at the center of the Federal District, the Capitol forms the origin point for the Districts street-numbering system. The original building was completed in 1800 and was subsequently expanded, like the principal buildings of the executive and judicial branches, the Capitol is built in a distinctive neoclassical style and has a white exterior. Both its east and west elevations are referred to as fronts, though only the east front was intended for the reception of visitors. In 2014, scaffolding was erected around the dome for a project scheduled to be completed by early 2017. All exterior scaffolding was removed by the end of summer 2016, prior to establishing the nations capital in Washington, D. C. the United States Congress and its predecessors had met in Philadelphia, New York City, and a number of other locations. In September 1774, the First Continental Congress brought together delegates from the colonies in Philadelphia, followed by the Second Continental Congress, Congress requested that John Dickinson, the Governor of Pennsylvania, call up the militia to defend Congress from attacks by the protesters. In what became known as the Pennsylvania Mutiny of 1783, Dickinson sympathized with the protesters and refused to remove them from Philadelphia. As a result, Congress was forced to flee to Princeton, New Jersey, on June 21,1783, and met in Annapolis, Maryland, the United States Congress was established upon ratification of the United States Constitution and formally began on March 4,1789. New York City remained home to Congress until July 1790, when the Residence Act was passed to pave the way for a permanent capital. As part of the legislation, Philadelphia was chosen as a capital for ten years, until the nations capital in Washington. Pierre Charles LEnfant was given the task of creating the city plan for the new capital city, in reviewing LEnfants plan, Thomas Jefferson insisted the legislative building be called the Capitol rather than Congress House. The word Capitol comes from Latin and is associated with the Temple of Jupiter Optimus Maximus on Capitoline Hill, the connection between the two is not, however, crystal clear. In spring 1792, United States Secretary of State Thomas Jefferson proposed a competition to solicit designs for the Capitol and the Presidents House. The prize for the competition was $500 and a lot in the Federal City, the most promising of the submissions was by Stephen Hallet, a trained French architect. However, Hallets designs were overly fancy, with too much French influence, a late entry by amateur architect William Thornton was submitted on January 31,1793, to much praise for its Grandeur, Simplicity, and Beauty by Washington, along with praise from Thomas Jefferson. Thornton was inspired by the east front of the Louvre, as well as the Paris Pantheon for the portion of the design
2.
Legislature
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A legislature is a deliberative assembly with the authority to make laws for a political entity such as a country or city. Legislatures form important parts of most governments, in the separation of model, they are often contrasted with the executive. Laws enacted by legislatures are known as legislation, legislatures observe and steer governing actions and usually have exclusive authority to amend the budget or budgets involved in the process. The members of a legislature are called legislators, each chamber of legislature consists of a number of legislators who use some form of parliamentary procedure to debate political issues and vote on proposed legislation. There must be a number of legislators present to carry out these activities. Some of the responsibilities of a legislature, such as giving first consideration to newly proposed legislation, are delegated to committees made up of small selections of the legislators. The members of a legislature usually represent different political parties, the members from each party generally meet as a caucus to organize their internal affairs, the internal organization of a legislature is also shaped by the informal norms that are shared by its members. Legislatures vary widely in the amount of power they wield, compared to other political players such as judiciaries, militaries. In 2009, political scientists M. Steven Fish and Matthew Kroenig constructed a Parliamentary Powers Index in an attempt to quantify the different degrees of power among national legislatures, such a system renders the legislature more powerful. Legislatures will sometime delegate their legislative power to administrative or executive agencies, legislatures are made up of individual members, known as legislators, who vote on proposed laws. For example, a legislature that has 100 seats has 100 members, by extension, an electoral district that elects a single legislator can also be described as a seat, as, for, example, in the phrases safe seat and marginal seat. In parliamentary systems of government, the executive is responsible to the legislature which may remove it with a vote of no confidence, names for national legislatures include parliament, congress, diet and assembly. A legislature which operates as a unit is unicameral, one divided into two chambers is bicameral, and one divided into three chambers is tricameral. In bicameral legislatures, one chamber is considered the upper house. In federations, the upper house typically represents the component states. This is a case with the legislature of the European Union. Tricameral legislatures are rare, the Massachusetts Governors Council still exists, tetracameral legislatures no longer exist, but they were previously used in Scandinavia. Legislatures vary widely in their size, among national legislatures, Chinas National Peoples Congress is the largest with 2987 members, while Vatican Citys Pontifical Commission is the smallest with 7
3.
United States Senate
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The United States Senate is the upper chamber of the United States Congress which, along with the House of Representatives, the lower chamber, composes the legislature of the United States. The composition and powers of the Senate are established by Article One of the United States Constitution. S. From 1789 until 1913, Senators were appointed by the legislatures of the states represented, following the ratification of the Seventeenth Amendment in 1913. The Senate chamber is located in the wing of the Capitol, in Washington. It further has the responsibility of conducting trials of those impeached by the House, in the early 20th century, the practice of majority and minority parties electing their floor leaders began, although they are not constitutional officers. This idea of having one chamber represent people equally, while the other gives equal representation to states regardless of population, was known as the Connecticut Compromise, there was also a desire to have two Houses that could act as an internal check on each other. One was intended to be a Peoples House directly elected by the people, the other was intended to represent the states to such extent as they retained their sovereignty except for the powers expressly delegated to the national government. The Senate was thus not designed to serve the people of the United States equally, the Constitution provides that the approval of both chambers is necessary for the passage of legislation. First convened in 1789, the Senate of the United States was formed on the example of the ancient Roman Senate, the name is derived from the senatus, Latin for council of elders. James Madison made the comment about the Senate, In England, at this day, if elections were open to all classes of people. An agrarian law would take place. If these observations be just, our government ought to secure the permanent interests of the country against innovation, landholders ought to have a share in the government, to support these invaluable interests, and to balance and check the other. They ought to be so constituted as to protect the minority of the opulent against the majority, the senate, therefore, ought to be this body, and to answer these purposes, the people ought to have permanency and stability. The Constitution stipulates that no constitutional amendment may be created to deprive a state of its equal suffrage in the Senate without that states consent, the District of Columbia and all other territories are not entitled to representation in either House of the Congress. The District of Columbia elects two senators, but they are officials of the D. C. city government. The United States has had 50 states since 1959, thus the Senate has had 100 senators since 1959. In 1787, Virginia had roughly ten times the population of Rhode Island, whereas today California has roughly 70 times the population of Wyoming and this means some citizens are effectively two orders of magnitude better represented in the Senate than those in other states. Seats in the House of Representatives are approximately proportionate to the population of each state, before the adoption of the Seventeenth Amendment in 1913, Senators were elected by the individual state legislatures
4.
Supreme Court of the United States
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The Supreme Court of the United States is the highest federal court of the United States. In the legal system of the United States, the Supreme Court is the interpreter of federal constitutional law. The Court normally consists of the Chief Justice of the United States and eight justices who are nominated by the President. Once appointed, justices have life tenure unless they resign, retire, in modern discourse, the justices are often categorized as having conservative, moderate, or liberal philosophies of law and of judicial interpretation. Each justice has one vote, and while many cases are decided unanimously, the Court meets in the United States Supreme Court Building in Washington, D. C. The Supreme Court is sometimes referred to as SCOTUS, in analogy to other acronyms such as POTUS. The ratification of the United States Constitution established the Supreme Court in 1789 and its powers are detailed in Article Three of the Constitution. The Supreme Court is the court specifically established by the Constitution. The Court first convened on February 2,1790, by which five of its six initial positions had been filled. According to historian Fergus Bordewich, in its first session, he Supreme Court convened for the first time at the Royal Exchange Building on Broad Street and they had no cases to consider. After a week of inactivity, they adjourned until September, the sixth member was not confirmed until May 12,1790. Because the full Court had only six members, every decision that it made by a majority was made by two-thirds. However, Congress has always allowed less than the Courts full membership to make decisions, under Chief Justices Jay, Rutledge, and Ellsworth, the Court heard few cases, its first decision was West v. Barnes, a case involving a procedural issue. The Courts power and prestige grew substantially during the Marshall Court, the Marshall Court also ended the practice of each justice issuing his opinion seriatim, a remnant of British tradition, and instead issuing a single majority opinion. Also during Marshalls tenure, although beyond the Courts control, the impeachment, the Taney Court made several important rulings, such as Sheldon v. Nevertheless, it is primarily remembered for its ruling in Dred Scott v. Sandford, which helped precipitate the Civil War. In the Reconstruction era, the Chase, Waite, and Fuller Courts interpreted the new Civil War amendments to the Constitution, during World War II, the Court continued to favor government power, upholding the internment of Japanese citizens and the mandatory pledge of allegiance. Nevertheless, Gobitis was soon repudiated, and the Steel Seizure Case restricted the pro-government trend, the Warren Court dramatically expanded the force of Constitutional civil liberties. It held that segregation in public schools violates equal protection and that traditional legislative district boundaries violated the right to vote
5.
Neoclassical architecture
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Neoclassical architecture is an architectural style produced by the neoclassical movement that began in the mid-18th century. In its purest form, it is a style derived from the architecture of classical antiquity, the Vitruvian principles. In form, Neoclassical architecture emphasizes the wall rather than chiaroscuro, Neoclassical architecture is still designed today, but may be labelled New Classical Architecture for contemporary buildings. In Central and Eastern Europe, the style is referred to as Classicism. Many early 19th-century neoclassical architects were influenced by the drawings and projects of Étienne-Louis Boullée, the many graphite drawings of Boullée and his students depict spare geometrical architecture that emulates the eternality of the universe. There are links between Boullées ideas and Edmund Burkes conception of the sublime, the baroque style had never truly been to the English taste. The most popular was the four-volume Vitruvius Britannicus by Colen Campbell, the book contained architectural prints of famous British buildings that had been inspired by the great architects from Vitruvius to Palladio. At first the book featured the work of Inigo Jones. Palladian architecture became well established in 18th-century Britain, at the forefront of the new school of design was the aristocratic architect earl, Richard Boyle, 3rd Earl of Burlington, in 1729, he and William Kent, designed Chiswick House. This House was a reinterpretation of Palladios Villa Capra, but purified of 16th century elements and this severe lack of ornamentation was to be a feature of the Palladianism. In 1734 William Kent and Lord Burlington designed one of Englands finest examples of Palladian architecture with Holkham Hall in Norfolk, the main block of this house followed Palladios dictates quite closely, but Palladios low, often detached, wings of farm buildings were elevated in significance. This classicising vein was also detectable, to a degree, in the Late Baroque architecture in Paris. This shift was even visible in Rome at the redesigned façade for S, by the mid 18th century, the movement broadened to incorporate a greater range of Classical influences, including those from Ancient Greece. The shift to neoclassical architecture is conventionally dated to the 1750s, in France, the movement was propelled by a generation of French art students trained in Rome, and was influenced by the writings of Johann Joachim Winckelmann. The style was adopted by progressive circles in other countries such as Sweden. A second neoclassic wave, more severe, more studied and more consciously archaeological, is associated with the height of the Napoleonic Empire, in France, the first phase of neoclassicism was expressed in the Louis XVI style, and the second in the styles called Directoire or Empire. The Scottish architect Charles Cameron created palatial Italianate interiors for the German-born Catherine II the Great in St. Petersburg, indoors, neoclassicism made a discovery of the genuine classic interior, inspired by the rediscoveries at Pompeii and Herculaneum. These had begun in the late 1740s, but only achieved an audience in the 1760s
6.
United States Bicentennial
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It was a central event in the memory of the American Revolution. The Bicentennial culminated on Sunday, July 4,1976, with the 200th anniversary of the adoption of the Declaration of Independence, the plans for the Bicentennial began when Congress created the American Revolution Bicentennial Commission on July 4,1966. Initially, the Bicentennial celebration was planned as a single city exposition that would be staged in either Philadelphia or Boston, ARBA selected a logo via contest in 1974. Bruce N. Blackburn, co-designer of the modernized NASA insignia used from 1975 to 1992, the logo consisted of a white five-point star inside a stylized star of red, white and blue. It was encircled by the inscription American Revolution Bicentennial 1776–1976 in Helvetica Regular, the logo became a flag that flew at many government facilities throughout the United States and appeared on many other souvenirs and postage stamps issued by the Postal Service. The official Bicentennial events began April 1,1975, when the American Freedom Train launched in Wilmington, Delaware to start its 21-month,25, 388-mile tour of the 48 contiguous states. On April 18,1975, President Gerald Ford traveled to Boston to light a lantern at the historic Old North Church. Festivities included elaborate fireworks in the skies above major American cities, President Ford presided over the display in Washington, D. C. which was televised nationally. A large international fleet of tall-masted sailing ships gathered first in New York City on Independence Day and these nautical parades were named Operation Sail and witnessed by several million observers. The gathering was the second of six such Op Sail events to date, the vessels docked and allowed the general public to tour the ships in both cities, while their crews were entertained on shore at various ethnic celebrations and parties. In addition to the presence of the ships, navies of many nations sent warships to New York harbor for an International Naval Review held the morning of July 4. The review ended just above Liberty Island around 10,30 am, several people threw packages labeled Gulf Oil and Exxon into Boston Harbor in symbolic opposition to corporate power, in the style of the Boston Tea party. Britains Queen Elizabeth and Prince Philip made a visit to the United States to tour the country and attend Bicentennial festivities with President. Their visit aboard the Royal Yacht Britannia included stops in Philadelphia, Washington, Virginia, New York, Connecticut, and Massachusetts. While in Philadelphia on July 6,1976, Queen Elizabeth presented the Bicentennial Bell on behalf of the British people, local observances included painting mailboxes and fire hydrants red, white, and blue. A wave of patriotism and nostalgia swept the nation and there was a feeling that the irate era of the Vietnam War. In Washington, D. C. the Smithsonian Institution opened an exhibition in its Arts and Industries Building that replicated the look. Many of the Smithsonians museum artifacts dated from the 1876 Worlds Fair in Philadelphia that commemorated the 100th anniversary of the independence of the United States, the Smithsonian also opened the new home of the National Air and Space Museum July 1,1976
7.
Museum
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Most large museums are located in major cities throughout the world and more local ones exist in smaller cities, towns and even the countryside. Museums have varying aims, ranging from serving researchers and specialists to serving the general public, the goal of serving researchers is increasingly shifting to serving the general public. There are many types of museums, including art museums, natural history museums, science museums, war museums, the city with the largest number of museums is Mexico City with over 128 museums. According to The World Museum Community, there are more than 55,000 museums in 202 countries, the English museum comes from the Latin word, and is pluralized as museums. The first museum/library is considered to be the one of Plato in Athens, however, Pausanias gives another place called Museum, namely a small hill in Classical Athens opposite to the Akropolis. The hill was called Mouseion after Mousaious, a man who used to sing on the hill, the purpose of modern museums is to collect, preserve, interpret, and display items of artistic, cultural, or scientific significance for the education of the public. The purpose can also depend on ones point of view, to a family looking for entertainment on a Sunday afternoon, a trip to a local history museum or large city art museum could be a fun, and enlightening way to spend the day. To city leaders, a healthy museum community can be seen as a gauge of the health of a city. To a museum professional, a museum might be seen as a way to educate the public about the museums mission, Museums are, above all, storehouses of knowledge. In 1829, James Smithsons bequest, that would fund the Smithsonian Institution, stated he wanted to establish an institution for the increase, Museums of natural history in the late 19th century exemplified the Victorian desire for consumption and for order. Gathering all examples of classification of a field of knowledge for research. As American colleges grew in the 19th century, they developed their own natural history collections for the use of their students, while many large museums, such as the Smithsonian Institution, are still respected as research centers, research is no longer a main purpose of most museums. While there is a debate about the purposes of interpretation of a museums collection, there has been a consistent mission to protect. Much care, expertise, and expense is invested in efforts to retard decomposition in aging documents, artifacts, artworks. All museums display objects that are important to a culture, as historian Steven Conn writes, To see the thing itself, with ones own eyes and in a public place, surrounded by other people having some version of the same experience can be enchanting. Museum purposes vary from institution to institution, some favor education over conservation, or vice versa. For example, in the 1970s, the Canada Science and Technology Museum favored education over preservation of their objects and they displayed objects as well as their functions. One exhibit featured a printing press that a staff member used for visitors to create museum memorabilia
8.
United States Capitol rotunda
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The United States Capitol rotunda is the central rotunda of the United States Capitol in Washington, D. C. Located below the Capitol dome, it is the tallest part of the Capitol and has described as its symbolic. The rotunda is surrounded by corridors connecting the House of Representatives, to the south of the rotunda is the semi-circular National Statuary Hall, which until 1857 was the House of Representatives chamber. To the northeast of the rotunda is the Old Senate Chamber, used by the Senate until 1859 and by the Supreme Court of the United States until 1935. The rotunda is 96 feet in diameter and rises 48 feet to the top of its walls and 180 feet 3 inches to the canopy of the dome, the dome is surmounted by the American Statue of Freedom. It is also used for ceremonial events authorized by concurrent resolution, the doctor and architect William Thornton was the winner of the contest to design the Capitol in 1793. Thornton had first conceived the idea of a central rotunda, however, due to lack of funds or resources, oft-interrupted construction, and the British attack on Washington during the War of 1812, work on the rotunda did not begin until 1818. The rotunda was designed in the style and was intended to evoke the design of the Pantheon. The sandstone rotunda walls rise 48 feet above the floor, everything above this—the Capitol dome–was designed in 1854 by Thomas U, Walter, the fourth Architect of the Capitol. Walter had also designed the Capitols north and south extensions, in 1862, Walter asked painter Constantino Brumidi to design a picture 65 feet in diameter, painted in fresco, on the concave canopy over the eye of the New Dome of the U. S. Capitol. At this time, Brumidi may have added a watercolor canopy design over Walters tentative 1859 sketch, the dome was being finished in the middle of the American Civil War and was constructed from fireproof cast iron. During the Civil War, the rotunda was used as a hospital for Union soldiers. The dome was completed in 1866. Originally the crypt had an open ceiling into the rotunda, visitors can still see the holes in the stone circle that marked the rim of the open space in the rotunda floor. In January 2013, the Architect of the Capitol announced a four-year, $10 million project to repair and conserve the Capitol Domes exterior, the dome and rotunda, which were last conserved in 1960, are showing significant signs of rust and disrepair. There is a danger that decorative ironwork could fall from the rotunda to the space below, without immediate repair, safety netting will be installed. Eight niches in the rotunda hold large, framed historical paintings, all are oil-on-canvas and measure 12 by 18 feet. Four of these are scenes from the American Revolution, painted by John Trumbull and these are Declaration of Independence, Surrender of General Burgoyne, Surrender of Lord Cornwallis, and General George Washington Resigning his Commission
9.
Ionic order
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The Ionic order forms one of the three classical orders of classical architecture, the other two canonic orders being the Doric and the Corinthian. There are two orders, the Tuscan, and the rich variant of Corinthian called the composite order. The Ionic columns are the thinnest and smallest columns out of the three canonic orders, the Ionic capital is characterized by the use of volutes. The Ionic columns normally stand on a base which separates the shaft of the column from the stylobate or platform, since Vitruvius a female character has been ascribed to the Ionic, in contrast to the masculine Doric. The major features of the Ionic order are the volutes of its capital, the only tools required to design these features were a straight-edge, a right angle, string and a compass. Originally the volutes lay in a plane, then it was seen that they could be angled out on the corners. Ionic columns are most often fluted, after a little early experimentation, the number of hollow flutes in the shaft settled at 24. This standardization kept the fluting in a proportion to the diameter of the column at any scale. Roman fluting leaves a little of the surface between each hollow, Greek fluting runs out to a knife edge that was easily scarred. In some instances, the fluting has been omitted, mohr included 8 unfluted Ionic frontal columns on his 1928 design for the railroads St. Louis suburban stop Delmar Station. Pictorial often narrative bas-relief frieze carving provides a feature of the Ionic order. Roman and Renaissance practice condensed the height of the entablature by reducing the proportions of the architrave, the Ionic order originated in the mid-6th century BC in Ionia, the southwestern coastland and islands of Asia Minor settled by Ionian Greeks, where an Ionian dialect was spoken. The Ionic order column was being practiced in mainland Greece in the 5th century BC and it was most popular in the Archaic Period in Ionia. The first of the great Ionic temples was the Temple of Hera on Samos and it stood for only a decade before it was leveled by an earthquake. A longer-lasting 6th century Ionic temple was the Temple of Artemis at Ephesus, the Parthenon, although it conforms mainly to the Doric order, also has some Ionic elements. A more purely Ionic mode to be seen on the Athenian Acropolis is exemplified in the Erechtheum, following the conquests of Alexander the Great in the east, a few examples of the Ionic order can be found as far as Pakistan with the Jandial temple near Taxila. Several examples of capitals displaying Ionic influences can seen as far away as Patna, especially with the Pataliputra capital. Renaissance architectural theorists took his hints, to interpret the Ionic order as matronly in comparison to the Doric order, the Ionic is a natural order for post-Renaissance libraries and courts of justice, learned and civilized
10.
Variegation
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Variegation is the appearance of differently coloured zones in the leaves, and sometimes the stems, of plants. Variegated leaves occur rarely in nature, species with variegated individuals are sometimes found in the understory of tropical rainforests, and this habitat is the source of a number of variegated house plants. The term is sometimes used to refer to colour zonation in flowers, minerals. Typically, stem cuttings, bud and stem grafting, and other methods that results in growth from leaf axil buds will preserve variegation. Cuttings with complete variegation may be if not impossible to propagate. Root cuttings will not usually preserve variegation, since the new tissue is derived from a particular tissue type within the root. Some variegation is due to visual effects caused by reflection of light from the leaf surface and this can happen when an air layer is located just under the epidermis resulting in a white or silvery reflection. It is sometimes called blister variegation, pilea is an example of a house plant that shows this effect. Leaves of most Cyclamen species show such patterned variegation, varying between plants, but consistent within each plant, another type of reflective variegation is caused by hairs on parts of the leaf, which may be coloured differently from the leaf. This is found in various Begonia species and garden hybrids, sometimes venal variegation occurs – the veins of the leaf are picked out in white or yellow. This is due to lack of green tissue above the veins and it can be seen in some aroids. The blessed milk thistle, Silybum marianum, is a plant in which type of venal variegation occurs. A common cause of variegation is the masking of green pigment by other pigments and this often extends to the whole leaf, causing it to be reddish or purplish. On some plants however, consistent zonal markings occur, such as on some clovers, bromeliads, certain Pelargonium, on others, such as the commonly grown forms of Coleus, the variegation can vary widely within a population. In Nymphaea lotus, the lotus, leaf variegations appear under intense illumination. Virus infections may cause patterning to appear on the leaf surface, the patterning is often characteristic of the infection. Examples are the viruses, which produce a mosaic-type effect on the leaf surface or the citrus variegation virus. Recently a virus disease, hosta virus X has been identified that causes mottled leaf coloring in hostas, at first, diseased plants were propagated and grown for their mottled foliage, at the risk of infecting other healthy hostas. g
11.
Marble
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Marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite. Geologists use the marble to refer to metamorphosed limestone, however. Marble is commonly used for sculpture and as a building material and this stem is also the basis for the English word marmoreal, meaning marble-like. In Hungarian it is called márvány, Marble is a rock resulting from metamorphism of sedimentary carbonate rocks, most commonly limestone or dolomite rock. Metamorphism causes variable recrystallization of the carbonate mineral grains. The resulting marble rock is composed of an interlocking mosaic of carbonate crystals. Primary sedimentary textures and structures of the carbonate rock have typically been modified or destroyed. Pure white marble is the result of metamorphism of a very pure limestone or dolomite protolith, green coloration is often due to serpentine resulting from originally magnesium-rich limestone or dolostone with silica impurities. These various impurities have been mobilized and recrystallized by the intense pressure, examples of historically notable marble varieties and locations, White marble has been prized for its use in sculptures since classical times. This preference has to do with its softness, which made it easier to carve, relative isotropy and homogeneity, construction marble is a stone which is composed of calcite, dolomite or serpentine which is capable of taking a polish. More generally in construction, specifically the dimension stone trade, the marble is used for any crystalline calcitic rock useful as building stone. For example, Tennessee marble is really a dense granular fossiliferous gray to pink to maroon Ordovician limestone that geologists call the Holston Formation. Ashgabat, the city of Turkmenistan, was recorded in the 2013 Guinness Book of Records as having the worlds highest concentration of white marble buildings. According to the United States Geological Survey, U. S. domestic marble production in 2006 was 46,400 tons valued at about $18.1 million, compared to 72,300 tons valued at $18.9 million in 2005. Crushed marble production in 2006 was 11.8 million tons valued at $116 million, of which 6.5 million tons was finely ground calcium carbonate and the rest was construction aggregate. For comparison,2005 crushed marble production was 7.76 million tons valued at $58.7 million, of which 4.8 million tons was finely ground calcium carbonate, U. S. dimension marble demand is about 1.3 million tons. The DSAN World Demand for Marble Index has shown a growth of 12% annually for the 2000–2006 period, the largest dimension marble application is tile. In 1998, marble production was dominated by 4 countries that accounted for almost half of production of marble
12.
Quarry
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A quarry is a place from which dimension stone, rock, construction aggregate, riprap, sand, gravel, or slate has been excavated from the ground. A quarry is the thing as an open-pit mine from which minerals are extracted. The only non-trivial difference between the two is that open-pit mines that produce building materials and dimension stone are commonly referred to as quarries, the word quarry can also include the underground quarrying for stone, such as Bath stone. The surfaces are polished and finished with varying degrees of sheen or luster, polished slabs are often cut into tiles or countertops and installed in many kinds of residential and commercial properties. Natural stone quarried from the earth is considered a luxury and tends to be a highly durable surface. Quarries in level areas with shallow groundwater or which are located close to surface water often have engineering problems with drainage, generally the water is removed by pumping while the quarry is operational, but for high inflows more complex approaches may be required. For example, the Coquina quarry is excavated to more than 60 feet below sea level, to reduce surface leakage, a moat lined with clay was constructed around the entire quarry. Ground water entering the pit is pumped up into the moat, as a quarry becomes deeper, water inflows generally increase and it also becomes more expensive to lift the water higher during removal, this can become the limiting factor in quarry depth. Some water-filled quarries are worked from beneath the water, by dredging, many people and municipalities consider quarries to be eyesores and require various abatement methods to address problems with noise, dust, and appearance. One of the effective and famous examples of successful quarry restoration is Butchart Gardens in Victoria, BC. A further problem is pollution of roads from trucks leaving the quarries, to control and restrain the pollution of public roads, wheel washing systems are becoming more common. Many quarries naturally fill with water after abandonment and become lakes, water-filled quarries can be very deep with water, often 50 feet or more, that is often surprisingly cold. Unexpectedly cold water can cause a swimmers muscles to weaken, it can also cause shock. Though quarry water is very clear, submerged quarry stones. Several people drown in quarries each year, however, many inactive quarries are converted into safe swimming sites
13.
Potomac River
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The Potomac River /pəˈtoʊmək/ is located along the mid-Atlantic Ocean coast of the United States and flows into the Chesapeake Bay. The river is approximately 405 miles long, with an area of about 14,700 square miles. In terms of area, this makes the Potomac River the fourth largest river along the Atlantic coast of the United States, over 5 million people live within the Potomac watershed. The river forms part of the borders between Maryland and Washington, D. C. on the left descending bank and West Virginia and Virginia on the right descending bank. The majority of the lower Potomac River is part of the State of Maryland, exceptions include a small tidal portion within the District of Columbia, and the border with Virginia being delineated from point to point. Except for a portion of its headwaters in West Virginia. The South Branch Potomac River lies completely within the state of West Virginia except for its headwaters, the Potomac River runs 405 miles from the Fairfax Stone in West Virginia on the Allegheny Plateau to Point Lookout, Maryland, and drains 14,679 square miles. The length of the river from the junction of its North and South Branches to Point Lookout is 302 miles, the average flow is 10,800 ft³/s. The largest flow recorded on the Potomac at Washington, D. C. was in March 1936 when it reached 425,000 ft³/s. The lowest flow recorded at the same location was 600 ft³/s in September,1966. The source of the North Branch is at the Fairfax Stone located at the junction of Grant, Tucker, the source of the South Branch is located near Hightown in northern Highland County, Virginia. The rivers two branches converge just east of Green Spring in Hampshire County, West Virginia, to form the Potomac. Once the Potomac drops from the Piedmont to the Coastal Plain at Little Falls, tides further influence the river as it passes through Washington, D. C. salinity in the Potomac River Estuary increases thereafter with distance downstream. The estuary also widens, reaching 11 statute miles wide at its mouth, Potomac is a European spelling of Patowmeck, the Algonquian name of a Native American village, perhaps meaning something brought. Native Americans had different names for different parts of the river, calling the river above Great Falls Cohongarooton, meaning honking geese and Patawomke below the fall, meaning river of swans. The spelling of the name has many forms over the years from Patawomeke to Patawomeck, Patowmack. The rivers name was decided upon as Potomac by the Board on Geographic Names in 1931. The river itself is at least two years old, likely extending back ten to twenty million years before present when the Atlantic Ocean lowered and exposed coastal sediments along the fall line
14.
Erechtheion
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The Erechtheion or Erechtheum is an ancient Greek temple on the north side of the Acropolis of Athens in Greece which was dedicated to both Athena and Poseidon. The temple as seen today was built between 421 and 406 BCE and its architect may have been Mnesicles, and it derived its name from a shrine dedicated to the legendary Greek hero Erichthonius. The sculptor and mason of the structure was Phidias, who was employed by Pericles to build both the Erechtheum and the Parthenon, some have suggested that it may have been built in honor of the legendary king Erechtheus, who is said to have been buried nearby. Erechtheus was mentioned in Homers Iliad as a king and ruler of Athens during the Archaic Period, and Erechtheus. It is believed to have been a replacement for the Peisistratid temple of Athena Polias destroyed by the Persians in 480 BC, the need to preserve multiple adjacent sacred precincts likely explains the complex design. The main structure consists of up to four compartments, the largest being the east cella, the entire temple is on a slope, so the west and north sides are about 3 m lower than the south and east sides. It was built entirely of marble from Mount Pentelikon, with friezes of black limestone from Eleusis which bore sculptures executed in relief in white marble. It had elaborately carved doorways and windows, and its columns were decorated, they were painted, gilded and highlighted with gilt bronze. The building is known for early examples of egg-and-dart, and guilloche ornamental moldings, the Theory of Mouldings, p22, J. H. Janson 1926, has detailed drawings of some of the decorations. On the north side, there is another large porch with six Ionic columns, and on the south, the famous Porch of the Maidens, with six draped female figures as supporting columns. An olive tree remains on the Western side of the Erechtheus, though it was planted there in modern times by Sophia of Prussia, granddaughter of Queen Victoria, in honour of the Athenians. In front of the statue, a golden lamp called asbestos lychnia made by the sculptor Callimachus burned continuously with its asbestos wick and was refuelled once a year. The eastern part of the building was dedicated to Athena Polias, while the western part served the cult of Poseidon-Erechtheus and held the altars of Hephaistus and Voutos, according to the myth, Athenas sacred snake lived there. The snake was fed honey-cakes by Canephorae, the priestesses of Athena Polias, by custom the women of the ancient family of Eteoboutadae, the snakes occasional refusal to eat the cakes was thought a disastrous omen. The Erechtheion underwent extensive repairs and reformation for the first time during the 1st century B. C. after its burning by the Roman general Sulla. The intact Erechtheum was extensively described by the Roman geographer Pausanias, the building was altered decisively during the early Byzantine period, when it was transformed into a church dedicated to the Theometor. With this alteration many architectural features of the ancient construction were lost and it became a palace under Frankish rule and the residence of the Turkish commanders harem in the Ottoman period. Athenian legend had it that at night the remaining five Caryatids could be heard wailing for their lost sister, Elgin attempted to remove a second Caryatid, when technical difficulties arose, he tried to have it sawn to pieces
15.
Acropolis of Athens
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The word acropolis comes from the Greek words ἄκρον and πόλις. Although there are many other acropoleis in Greece, the significance of the Acropolis of Athens is such that it is known as The Acropolis without qualification. The Acropolis is located on a rock that rises 150 m above sea level in the city of Athens. It was also known as Cecropia, after the legendary serpent-man, Cecrops, while the earliest artifacts date to the Middle Neolithic era, there have been documented habitations in Attica from the Early Neolithic. There is little doubt that a Mycenaean megaron stood upon the hill during the late Bronze Age, nothing of this megaron survives except, probably, a single limestone column-base and pieces of several sandstone steps. Soon after the palace was constructed, a Cyclopean massive circuit wall was built,760 meters long, up to 10 meters high and this wall would serve as the main defense for the acropolis until the 5th century. The wall consisted of two built with large stone blocks and cemented with an earth mortar called emplekton. There were two lesser approaches up the hill on its side, consisting of steep, narrow flights of steps cut in the rock. Homer is assumed to refer to this fortification when he mentions the strong-built House of Erechtheus, at some point before the 13th century BC, an earthquake caused a fissure near the northeastern edge of the Acropolis. This fissure extended some 35 meters to a bed of marl in which a well was dug. An elaborate set of stairs was built and the served as an invaluable. There is no evidence for the existence of a Mycenean palace on top of the Athenian Acropolis. However, if there was such a palace, it seems to have been supplanted by later building activity, not a lot is known about the architectural appearance of the Acropolis until the Archaic era. In the 7th and the 6th centuries BC, the site was taken over by Kylon during the failed Kylonian revolt, nevertheless, it seems that a nine-gate wall, the Enneapylon, had been built around the biggest water spring, the Clepsydra, at the northwestern foot. A temple to Athena Polias, the deity of the city, was erected around 570–550 BC. Whether this temple replaced an older one, or just a sacred precinct or altar, is not known, probably, the Hekatompedon was built where the Parthenon now stands. Between 529–520 BC yet another temple was built by the Peisistratids and this temple of Athena Polias was built upon the Doerpfeld foundations, between the Erechtheion and the still-standing Parthenon. Arkhaios Neōs was destroyed by the Persian invasion in 480 BC, however, the temple may have been burnt down in 406/405 BC as Xenophon mentions that the old temple of Athena was set on fire
16.
George Washington
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George Washington was an American politician and soldier who served as the first President of the United States from 1789 to 1797 and was one of the Founding Fathers of the United States. He served as Commander-in-Chief of the Continental Army during the American Revolutionary War and he is popularly considered the driving force behind the nations establishment and came to be known as the father of the country, both during his lifetime and to this day. Washington was widely admired for his leadership qualities and was unanimously elected president by the Electoral College in the first two national elections. Washingtons incumbency established many precedents still in use today, such as the system, the inaugural address. His retirement from office two terms established a tradition that lasted until 1940 when Franklin Delano Roosevelt won an unprecedented third term. The 22nd Amendment now limits the president to two elected terms and he was born into the provincial gentry of Colonial Virginia to a family of wealthy planters who owned tobacco plantations and slaves, which he inherited. In his youth, he became an officer in the colonial militia during the first stages of the French. In 1775, the Second Continental Congress commissioned him as commander-in-chief of the Continental Army in the American Revolution, in that command, Washington forced the British out of Boston in 1776 but was defeated and nearly captured later that year when he lost New York City. After crossing the Delaware River in the middle of winter, he defeated the British in two battles, retook New Jersey, and restored momentum to the Patriot cause and his strategy enabled Continental forces to capture two major British armies at Saratoga in 1777 and Yorktown in 1781. In battle, however, Washington was repeatedly outmaneuvered by British generals with larger armies, after victory had been finalized in 1783, Washington resigned as commander-in-chief rather than seize power, proving his opposition to dictatorship and his commitment to American republicanism. Washington presided over the Constitutional Convention in 1787, which devised a new form of government for the United States. Following his election as president in 1789, he worked to unify rival factions in the fledgling nation and he supported Alexander Hamiltons programs to satisfy all debts, federal and state, established a permanent seat of government, implemented an effective tax system, and created a national bank. In avoiding war with Great Britain, he guaranteed a decade of peace and profitable trade by securing the Jay Treaty in 1795 and he remained non-partisan, never joining the Federalist Party, although he largely supported its policies. Washingtons Farewell Address was a primer on civic virtue, warning against partisanship, sectionalism. He retired from the presidency in 1797, returning to his home, upon his death, Washington was eulogized as first in war, first in peace, and first in the hearts of his countrymen by Representative Henry Lee III of Virginia. He was revered in life and in death, scholarly and public polling consistently ranks him among the top three presidents in American history and he has been depicted and remembered in monuments, public works, currency, and other dedications to the present day. He was born on February 11,1731, according to the Julian calendar, the Gregorian calendar was adopted within the British Empire in 1752, and it renders a birth date of February 22,1732. Washington was of primarily English gentry descent, especially from Sulgrave and his great-grandfather John Washington emigrated to Virginia in 1656 and began accumulating land and slaves, as did his son Lawrence and his grandson, Georges father Augustine
17.
Rembrandt Peale
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Rembrandt Peale was an American artist and museum keeper. A prolific portrait painter, he was acclaimed for his likenesses of presidents George Washington. Peales style was influenced by French Neoclassicism after a stay in Paris in his early thirties, Rembrandt Peale was born the third of six surviving children to his mother, Rachel Brewer, and father, Charles Willson Peale in Bucks County, Pennsylvania, on February 22,1778. The father, Charles, also a notable artist, named him after the noted 17th-century Dutch painter and engraver Rembrandt Harmenszoon van Rijn. His father also taught all of his children, including Raphaelle Peale, Rubens Peale and Titian Peale, to paint scenery and portraiture, Rembrandt began drawing at the age of 8. A year after his mother’s death and the remarriage of his father, Peale left the school of the arts, the canvas displays the young artists early mastery. The clothes, however, give the notion that Peale exaggerated what a 13-year-old would look like, later in his life, Peale often showed this painting to young beginners, to encourage them to go from bad to better. In July 1787, Charles Willson Peale introduced his son Rembrandt to George Washington, in 1795, at the age of 17, Rembrandt painted an aging Washington, making him appear far more aged than in reality. The portrait was well received, and Rembrandt had made his debut, at the age of 20, Peale married 22-year-old Eleanor May Short at St. Josephs Catholic Church in Philadelphia. During their marriage, Peale and Short had nine children, Rosalba, Eleanor, Michael Angelo, Angelica, in 1822, Peale moved to New York City where he embarked on an attempt to paint what he hoped would become the standard likeness of Washington. He studied portraits by artists including John Trumbull, Gilbert Stuart and his own father. Peale subsequently attempted to capitalize on the success of what became known as his Porthole picture. Patriae Pater was purchased by Congress in 1832 for $2,000 and it currently hangs in the Old Senate Chamber. In 1826 he helped found the National Academy of Design in New York City, Peale went on to create over 70 detailed replicas, including one of Washington in full military uniform that currently hangs in the Oval Office. Peale continued to paint other noted portraits, such as those of the third president Thomas Jefferson while he was in office, noted for his itinerant nature, Peale visited Europe several times to study art. Throughout his life, Peale traveled across the Western Hemisphere in search of inspiration and his father helped pay his way to Paris, where he stayed from June to September 1808, and again from October 1809 to November 1810. In Paris, Peale studied the works of Jacques-Louis David, which influenced him to paint in the Neoclassical style and he painted the famous explorer Alexander von Humboldt and several other noted patrons such as Joseph Louis Gay-Lussac and François André Michaux. After his successes in France, Peale returned to Philadelphia in 1810 and his efforts to establish his knowledge and mastery of art were displayed in his painting The Roman Daughter
18.
Steel
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Steel is an alloy of iron and other elements, primarily carbon, that is widely used in construction and other applications because of its high tensile strength and low cost. Steels base metal is iron, which is able to take on two forms, body centered cubic and face centered cubic, depending on its temperature. It is the interaction of those allotropes with the elements, primarily carbon. In the body-centred cubic arrangement, there is an atom in the centre of each cube. Carbon, other elements, and inclusions within iron act as hardening agents that prevent the movement of dislocations that otherwise occur in the lattices of iron atoms. The carbon in steel alloys may contribute up to 2. 1% of its weight. Steels strength compared to pure iron is possible at the expense of irons ductility. With the invention of the Bessemer process in the mid-19th century and this was followed by Siemens-Martin process and then Gilchrist-Thomas process that refined the quality of steel. With their introductions, mild steel replaced wrought iron, further refinements in the process, such as basic oxygen steelmaking, largely replaced earlier methods by further lowering the cost of production and increasing the quality of the product. Today, steel is one of the most common materials in the world and it is a major component in buildings, infrastructure, tools, ships, automobiles, machines, appliances, and weapons. Modern steel is generally identified by various grades defined by assorted standards organizations, the noun steel originates from the Proto-Germanic adjective stakhlijan, which is related to stakhla. The carbon content of steel is between 0. 002% and 2. 1% by weight for plain iron–carbon alloys and these values vary depending on alloying elements such as manganese, chromium, nickel, iron, tungsten, carbon and so on. Basically, steel is an alloy that does not undergo eutectic reaction. In contrast, cast iron does undergo eutectic reaction, too little carbon content leaves iron quite soft, ductile, and weak. Carbon contents higher than those of steel make an alloy, commonly called pig iron, while iron alloyed with carbon is called carbon steel, alloy steel is steel to which other alloying elements have been intentionally added to modify the characteristics of steel. Common alloying elements include, manganese, nickel, chromium, molybdenum, boron, titanium, vanadium, tungsten, cobalt, and niobium. Additional elements are important in steel, phosphorus, sulfur, silicon, and traces of oxygen, nitrogen, and copper. Alloys with a higher than 2. 1% carbon content, depending on other element content, cast iron is not malleable even when hot, but it can be formed by casting as it has a lower melting point than steel and good castability properties
19.
Cast iron
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Cast iron is a group of iron-carbon alloys with a carbon content greater than 2%. Its usefulness derives from its low melting temperature. Carbon ranging from 1. 8–4 wt%, and silicon 1–3 wt% are the main alloying elements of cast iron, Iron alloys with less carbon content are known as steel. While this technically makes the Fe–C–Si system ternary, the principle of cast iron solidification can be understood from the simpler binary iron–carbon phase diagram, cast iron tends to be brittle, except for malleable cast irons. It is resistant to destruction and weakening by oxidation, the earliest cast iron artefacts date to the 5th century BC, and were discovered by archaeologists in what is now Jiangsu in China. Cast iron was used in ancient China for warfare, agriculture, during the 15th century, cast iron became utilized for artillery in Burgundy, France, and in England during the Reformation. The first cast iron bridge was built during the 1770s by Abraham Darby III, cast iron is also used in the construction of buildings. Cast iron is made by re-melting pig iron, often along with quantities of iron, steel, limestone, carbon. Phosphorus and sulfur may be burnt out of the iron, but this also burns out the carbon. Depending on the application, carbon and silicon content are adjusted to the desired levels, other elements are then added to the melt before the final form is produced by casting. Cast iron is melted in a special type of blast furnace known as a cupola. After melting is complete, the molten cast iron is poured into a furnace or ladle. Cast irons properties are changed by adding various alloying elements, or alloyants, next to carbon, silicon is the most important alloyant because it forces carbon out of solution. A low percentage of silicon allows carbon to remain in solution forming iron carbide, a high percentage of silicon forces carbon out of solution forming graphite and the production of grey cast iron. Other alloying agents, manganese, chromium, molybdenum, titanium and vanadium counteracts silicon, promotes the retention of carbon, nickel and copper increase strength, and machinability, but do not change the amount of graphite formed. The carbon in the form of graphite results in an iron, reduces shrinkage, lowers strength. Sulfur, largely a contaminant when present, forms iron sulfide, the problem with sulfur is that it makes molten cast iron viscous, which causes defects. To counter the effects of sulfur, manganese is added because the two form into manganese sulfide instead of iron sulfide, the manganese sulfide is lighter than the melt so it tends to float out of the melt and into the slag
20.
Corinthian order
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The Corinthian order is the last developed of the three principal classical orders of ancient Greek and Roman architecture. The other two are the Doric order which was the earliest, followed by the Ionic order, when classical architecture was revived during the Renaissance, two more orders were added to the canon, the Tuscan order and the Composite order. The Corinthian, with its offshoot the Composite, is the most ornate of the orders, characterized by slender fluted columns and elaborate capitals decorated with acanthus leaves and it was employed in southern Gaul at the Maison Carrée, Nîmes and at the comparable podium temple at Vienne. Other prime examples noted by Mark Wilson Jones are the order of the Basilica Ulpia and the arch at Ancona the column of Phocas. The Corinthian order is named for the Greek city-state of Corinth, however, according to the architectural historian Vitruvius, the column was created by the sculptor Callimachus, probably an Athenian, who drew acanthus leaves growing around a votive basket. Its earliest use can be traced back to the Late Classical Period, the earliest Corinthian capital was found in Bassae, dated at 427 BC. In its proportions, the Corinthian column is similar to the Ionic column, though it is more slender, the abacus upon the capital has concave sides to conform to the outscrolling corners of the capital, and it may have a rosette at the center of each side. Corinthian columns were erected on the top level of the Roman Colosseum, holding up the least weight and their height to width ratio is about 10,1. One variant is the Tivoli Order, found at the Temple of Vesta, the Tivoli Orders Corintinan Capital has two rows of Acanthus and its abacus is decorated with oversize fleuron in the form of hibiscus flowers with pronounced spiral pistils. The column flutes have flat tops, the frieze exhibits fruit swag suspended between bucrania. Above each swag is a rosette, the cornice does not have modillions. Indo-Corinthian capitals are capitals crowning columns or pilasters, which can be found in the northwestern Indian subcontinent and these capitals are typically dated to the 1st centuries of our era, and constitute important elements of Greco-Buddhist art of Gandhara. The classical design was adapted, usually taking a more elongated form. Indo-Corinthian capitals also incorporated figures of the Buddha or Bodhisattvas, usually as central figures surrounded, the Corinthian architrave is divided in two or three sections, which may be equal, or they may bear interesting proportional relationships, one with another. Above the plain, unadorned architrave lies the frieze, which may be carved with a continuous design or left plain. At the Capitol the proportions of architrave to frieze are exactly 1,1, above that, the profiles of the cornice moldings are like those of the Ionic order. If the cornice is deep, it may be supported by brackets or modillions. The Corinthian column is almost always fluted, if it is not, it is often worth pausing to unravel the reason why
21.
Capital (architecture)
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In architecture the capital or chapiter forms the topmost member of a column. It mediates between the column and the load thrusting down upon it, broadening the area of the supporting surface. The capital, projecting on each side as it rises to support the abacus, joins the usually square abacus and the usually circular shaft of the column. The capital may be convex, as in the Doric order, concave, as in the bell of the Corinthian order, or scrolling out. These form the three types on which all capitals are based. The Composite order, established in the 16th century on a hint from the Arch of Titus, from the highly visible position it occupies in all colonnaded monumental buildings, the capital is often selected for ornamentation, and is often the clearest indicator of the architectural order. The treatment of its detail may be an indication of the buildings date, the decoration underneath the bracket capital comes from art and designs from the many cultures that the Persian Empire conquered and assimilated including Egypt, Babylon, and Lydia. But of course these decorations below the bracket capital serve no purpose and are simply there for show. The earliest Aegean capital is shown in the frescoes at Knossos in Crete, it was of the convex type. The Doric capital is the simplest of the five Classical orders, it consists of the abacus above an ovolo molding, the sloping side of the echinus becomes flatter in the later examples, and in the Colosseum at Rome forms a quarter round. In the Ionic capital, spirally coiled volutes are inserted between the abacus and the ovolo. In the Ionic capitals of the archaic Temple of Artemis at Ephesus the width of the abacus is twice that of its depth, a century later, in the temple on the Ilissus, the abacus has become square. It has been suggested that the foliage of the Greek Corinthian capital was based on the Acanthus spinosus, not all architectural foliage is as realistic as Isaac Wares however. The leaves are carved in two ranks or bands, like one leafy cup set within another. The various orders are discussed in Vitruvius books iii and iv, Vitruvius describes Roman practice in a practical fashion. He gives some tales about the invention of each of the Orders, the increasing adoption of composite capitals signalled a trend towards freer, more inventive capitals in Late Antiquity. The top of an anta is often decorated, usually with bands of floral motifs. The designs often respond to an order of columns, but usually with a different set of design principles, in order not to protude excessively from the wall surface, these structures tend to have a rather flat surface, forming brick-shaped capitals, called anta capitals
22.
Wrought iron
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Wrought iron is an iron alloy with a very low carbon content in contrast to cast iron. It is a mass of iron with fibrous slag inclusions which gives it a grain resembling wood. Wrought iron is tough, malleable, ductile, corrosion-resistant and easily welded, before the development of effective methods of steelmaking and the availability of large quantities of steel, wrought iron was the most common form of malleable iron. A wrought product is one that has been worked by forging, extruding, rolling, hammering, etcetera, to change its form. Wrought iron is a worked iron product that is seldom produced today as other cheaper. Historically, a modest amount of iron was refined into steel. The demand for wrought iron reached its peak in the 1860s with the adaptation of ironclad warships, however, as properties such as brittleness of mild steel improved, it became less costly and more widely available than wrought iron, whose usage then declined. Wrought iron is no longer produced on a commercial scale, many products described as wrought iron, such as guard rails, garden furniture and gates, are actually made of mild steel. They retain that description because they are made to resemble objects which in the past were wrought by hand by a blacksmith, the word wrought is an archaic past participle of the verb to work, and so wrought iron literally means worked iron. Wrought iron is a term for the commodity, but is also used more specifically for finished iron goods. It was used in that sense in British Customs records. Cast iron, unlike wrought iron, is brittle and cannot be worked either hot or cold, Cast iron can break if struck with a hammer. In the 17th, 18th, and 19th centuries, wrought iron went by a variety of terms according to its form, origin. While the bloomery process produced wrought iron directly from ore, cast iron or pig iron were the materials used in the finery forge. Pig iron and cast iron have higher content than wrought iron. Cast and especially pig iron have excess slag which must be at least partially removed to produce quality wrought iron, at foundries it was common to blend scrap wrought iron with cast iron to improve the physical properties of castings. Fusion eventually became accepted as relatively more important than composition below a given low carbon concentration. Another difference is that steel can be hardened by heat treating, historically, wrought iron was known as commercially pure iron, however, it no longer qualifies because current standards for commercially pure iron require a carbon content of less than 0.008 wt%
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Guard rail
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Guard rail or guardrail, sometimes referred to as guide rail or railing, is a system designed to keep people or vehicles from straying into dangerous or off-limits areas. A handrail is less restrictive than a rail and provides both support and the protective limitation of a boundary. Most public spaces are fitted with guard rails as a means of protection against accidental falls, any abrupt change in elevation where the higher portion is accessible makes a fall possible. Due to this responsibility and liability, rails are placed to protect people using the premises, guardrails are generally required by code where there is a drop of 30 or more. Examples of this are both architectural and environmental, environmental guard rails are placed along hiking trails where adjacent terrain is steep. Railings may also be located at scenic overlooks, guard rails in buildings are numerous, and are required by building codes in many circumstances. Guard rails along stairways are common, and catwalks and balconies are also lined with them, the most common residential guard rail is usually a wood railing around the deck. This typically is built on-site from pressure treated lumber, featuring a design of vertical baluster spaced every 3.5 to comply with building code. Other guard rail construction options are available, cable railings typically use stainless steel cables strung horizontally. Glass balusters and glass panels open the view while still providing safety, with the increasing popularity of composite lumber for decking, manufacturers, like TimberTech are providing composite railing components. Wrought iron is another choice that is traditional and sturdy, Building codes also require that no opening in a guard be of a size such that a 4 sphere may pass. There are three exceptions according to the 2003 International Building Code Section 1012.3 which allow openings to not exceed 8 or 21 depending on occupancy groups or special areas, an architect who was famous for creative use of handrails for social stability was Alvar Aalto. The guard rails of a tower such as the Space Needle or Eiffel Tower become exaggerated to the point of becoming a fence or cage. This is also done on bridges and overpasses to prevent accidents, guardrails are used in a facility setting to protect a companys greatest assets which include their people and expensive equipment. The strongest guardrail option is utilizing a manufacturer who produces industrial strength guardrail and this guardrail is constructed out of 4 Schedule 806 Schedule 40. It is then sleeved in Hi-Density Thermoplastic Polyethylene which makes it maintenance free and it can be mounted using a base-plate or cored into cement to enhance the strength. Guardrail can also be constructed of 10 gauge high-tensile steel formed into a two-rib corrugated design with two secondary ribs and this guardrail is similar in appearance to guardrails in an outdoor setting, but is often used in facilities. Once it is impacted, it must be repaired and replaced, guardrails were being used for the first time in Germany
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Crimson
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Crimson is a strong, red color, inclining to purple. Crimson is produced using the bodies of the kermes insect, which were gathered commercially in Mediterranean countries, where they live on the kermes oak. Kermes dyes have been found in burial wrappings in Anglo-Scandinavian York, carmine is the name given to the dye made from the dried bodies of the female cochineal, although the name crimson is sometimes applied to these dyes too. Cochineal appears to have brought to Europe during the conquest of Mexico by the Spaniard Hernán Cortés. It was first described by Mathioli in 1549, the pigment is also called cochineal after the insect from which it is made. Alizarin is a pigment that was first synthesized in 1868 by the German chemists Carl Gräbe and Carl Liebermann, alizarin crimson is a dye bonded onto alum which is then used as a pigment and mixed with ochre, sienna and umber. The word crimson has been recorded in English since 1400, and its earlier forms include cremesin, crymysyn, German Karmesin, Italian Cremisi, French cramoisi, Portuguese carmesim, etc. The ultimate source may be Sanskrit कृमिज kṛmi-jā meaning worm-made, a shortened form of carmesinus also gave the Latin carminus, from which comes carmine. Other cognates include the Old Church Slavic čruminu, archaic Russian чермный, carmine dyes, which give crimson and related red and purple colors, are based on an aluminium and calcium salt of carminic acid. Carmine lake is an aluminium or aluminium-tin lake of cochineal extract, purple lake is prepared like carmine lake with the addition of lime to produce the deep purple tone. Carmine dyes tend to fade quickly, carmine dyes were once widely prized in both the Americas and in Europe. They were used in paints by Michelangelo and for the fabrics of the Hussars, the Turks, the British Redcoats. Nowadays carmine dyes are used for coloring foodstuffs, medicines and cosmetics, as a food additive in the European Union, carmine dyes are designated E120, and are also called cochineal and Natural Red 4. Carmine dyes are used in some oil paints and watercolors used by artists. The color pink is displayed on the right, the color pink has a hue code of 350, placing it directly within the range of crimson colors. Thus, the pink is actually a pale tint of crimson. The color Baker-Miller Pink is displayed on the right, Baker-Miller Pink was formulated in 1979. With a hue code of 344, Baker-Miller Pink is within the range of crimson colors, the color fandango pink is displayed on the right
