1.
String instrument
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String instruments, stringed instruments, or chordophones are musical instruments that produce sound from vibrating strings when the performer plays or sounds the strings in some manner. Musicians play some string instruments by plucking the strings with their fingers or a plectrum—and others by hitting the strings with a wooden hammer or by rubbing the strings with a bow. In some keyboard instruments, such as the harpsichord or piano, with bowed instruments, the player rubs the strings with a horsehair bow, causing them to vibrate. With a hurdy-gurdy, the musician operates a wheel that rubs the strings. Bowed instruments include the string instruments of the Classical music orchestra. All of the string instruments can also be plucked with the fingers. Some types of string instrument are mainly plucked, such as the harp, in the Hornbostel-Sachs scheme of musical instrument classification, used in organology, string instruments are called chordophones. Other examples include the sitar, rebab, banjo, mandolin, ukulele, in most string instruments, the vibrations are transmitted to the body of the instrument, which often incorporates some sort of hollow or enclosed area. The body of the instrument also vibrates, along with the air inside it, the vibration of the body of the instrument and the enclosed hollow or chamber make the vibration of the string more audible to the performer and audience. The body of most string instruments is hollow, some, however—such as electric guitar and other instruments that rely on electronic amplification—may have a solid wood body. Archaeological digs have identified some of the earliest stringed instruments in Ancient Mesopotamian sites, like the lyres of Ur, the development of lyre instruments required the technology to create a tuning mechanism to tighten and loosen the string tension. During the medieval era, instrument development varied from country to country, Middle Eastern rebecs represented breakthroughs in terms of shape and strings, with a half a pear shape using three strings. Early versions of the violin and fiddle, by comparison, emerged in Europe through instruments such as the gittern, a four stringed precursor to the guitar and these instruments typically used catgut and other materials, including silk, for their strings. String instrument design refined during the Renaissance and into the Baroque period of musical history, violins and guitars became more consistent in design, and were roughly similar to what we use in the 2000s. At the same time, the 19th century guitar became more associated with six string models. In big bands of the 1920s, the guitar played backing chords. The development of guitar amplifiers, which contained a power amplifier, the development of the electric guitar provided guitarists with an instrument that was built to connect to guitar amplifiers. Electric guitars have magnetic pickups, volume control knobs and an output jack, in the 1960s, larger, more powerful guitar amplifiers were developed, called stacks
2.
Woodwind instrument
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Woodwind instruments are a family of musical instruments within the more general category of wind instruments. There are two types of woodwind instruments, flutes and reed instruments. What differentiates these instruments from other instruments is the way in which they produce their sound. Examples are a saxophone, a bassoon and a piccolo, flutes produce sound by directing a focused stream of air below the edge of a hole in a cylindrical tube. The flute family can be divided into two sub-families, open flutes and closed flutes, to produce a sound with an open flute, the player is required to blow a stream of air across a sharp edge that then splits the airstream. This split airstream then acts upon the air contained within the flutes hollow causing it to vibrate. Examples of open flutes are the flute, panpipes and shakuhachi. Ancient flutes of this variety were often made from sections of plants such as grasses, reeds. Later, flutes were made of such as tin, copper. Modern concert flutes are made of high-grade metal alloys, usually containing nickel, silver, copper. To produce a sound with a flute, the player is required to blow air into a duct. This duct acts as a channel bringing the air to a sharp edge, as with the open flutes, the air is then split, this causes the column of air within the closed flute to vibrate and produce sound. Examples of this type of include the recorder, ocarina. Reed instruments produce sound by focusing air into a mouthpiece which then causes a reed, or reeds, similar to flutes, Reed pipes are also further divided into two types, single reed and double reed. Single-reed woodwinds produce sound by placing a reed onto the opening of a mouthpiece, when air is forced between the reed and the mouthpiece, the reed causes the air column in the instrument to vibrate and produce its unique sound. Single reed instruments include the clarinet, saxophone, and others such as the chalumeau, double-reed instruments use two precisely cut, small pieces of cane bound together at the base. This form of production has been estimated to have originated in the middle to late Neolithic period. The finished, bound reed is inserted into the instrument and vibrates as air is forced between the two pieces and this family of reed pipes is subdivided further into another two sub-families, exposed double reed, and capped double reed instruments
3.
Brass instrument
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A brass instrument is a musical instrument that produces sound by sympathetic vibration of air in a tubular resonator in sympathy with the vibration of the players lips. Brass instruments are also called labrosones, literally meaning lip-vibrated instruments, there are several factors involved in producing different pitches on a brass instrument. The view of most scholars is that the brass instrument should be defined by the way the sound is made, as above. Thus one finds brass instruments made of wood, like the alphorn, the cornett, the serpent, as valved instruments are predominant among the brasses today, a more thorough discussion of their workings can be found below. The valves are usually piston valves, but can be rotary valves, slide brass instruments use a slide to change the length of tubing. The main instruments in this category are the family, though valve trombones are occasionally used. The trombone familys ancestor, the sackbut, and the folk instrument bazooka are also in the slide family, there are two other families that have, in general, become functionally obsolete for practical purposes. Instruments of both types, however, are used for period-instrument performances of Baroque or Classical pieces. In more modern compositions, they are used for their intonation or tone color. Natural brass instruments only play notes in the harmonic series. These include the bugle and older variants of the trumpet and horn, the trumpet was a natural brass instrument prior to about 1795, and the horn before about 1820. In the 18th century, makers developed interchangeable crooks of different lengths, natural instruments are still played for period performances and some ceremonial functions, and are occasionally found in more modern scores, such as those by Richard Wagner and Richard Strauss. Keyed or Fingered brass instruments used holes along the body of the instrument and these included the cornett, serpent, ophicleide, keyed bugle and keyed trumpet. They are more difficult to play than valved instruments, Brass instruments may also be characterised by two generalizations about geometry of the bore, that is, the tubing between the mouthpiece and the flaring of the tubing into the bell. Those two generalizations are with regard to the degree of taper or conicity of the bore and the diameter of the bore with respect to its length, cylindrical bore brass instruments are generally perceived as having a brighter, more penetrating tone quality compared to conical bore brass instruments. The trumpet, baritone horn and all trombones are cylindrical bore, in particular, the slide design of the trombone necessitates this. Conical bore brass instruments are those in which tubing of constantly increasing diameter predominates, conical bore instruments are generally perceived as having a more mellow tone quality than the cylindrical bore brass instruments. The British brass band group of instruments fall into this category and this includes the flugelhorn, cornet, tenor horn, horn, euphonium and tuba
4.
Percussion instrument
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A percussion instrument is a musical instrument that is sounded by being struck or scraped by a beater, struck, scraped or rubbed by hand, or struck against another similar instrument. The percussion family is believed to include the oldest musical instruments, the percussion section of an orchestra most commonly contains instruments such as timpani, snare drum, bass drum, cymbals, triangle and tambourine. However, the section can also contain non-percussive instruments, such as whistles and sirens, percussive techniques can also be applied to the human body, as in body percussion. On the other hand, keyboard instruments, such as the celesta, are not normally part of the percussion section, Percussion instruments may play not only rhythm, but also melody and harmony. Percussion is commonly referred to as the backbone or the heartbeat of an ensemble, often working in close collaboration with bass instruments. In jazz and other popular ensembles, the pianist, bassist, drummer. Most classical pieces written for full orchestra since the time of Haydn and Mozart are orchestrated to place emphasis on the strings, woodwinds, however, often at least one pair of timpani is included, though they rarely play continuously. Rather, they serve to provide additional accents when needed, in the 18th and 19th centuries, other percussion instruments have been used, again generally sparingly. The use of percussion instruments became more frequent in the 20th century classical music, in almost every style of music, percussion plays a pivotal role. In classic jazz, one almost immediately thinks of the rhythm of the hi-hats or the ride cymbal when the word swing is spoken. Because of the diversity of instruments, it is not uncommon to find large musical ensembles composed entirely of percussion. Rhythm, melody, and harmony are all represented in these ensembles, music for pitched percussion instruments can be notated on a staff with the same treble and bass clefs used by many non-percussive instruments. Music for percussive instruments without a pitch can be notated with a specialist rhythm or percussion-clef. The word percussion has evolved from Latin terms, percussio, as a noun in contemporary English it is described in Wiktionary as the collision of two bodies to produce a sound. Hornbostel–Sachs has no high-level section for percussion, Most percussion instruments are classified as idiophones and membranophones.1 Concussion idiophones or clappers, played in pairs and beaten against each other, such as zills and clapsticks. 111.2 Percussion idiophones, includes many percussion instruments played with the hand or by a mallet, such as the hang, gongs and the xylophone. 21 Struck drums, includes most types of drum, such as the timpani, snare drum, (Included in most drum sets or 412. Stringed instruments played with such as the hammered dulcimer
5.
China
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China, officially the Peoples Republic of China, is a unitary sovereign state in East Asia and the worlds most populous country, with a population of over 1.381 billion. The state is governed by the Communist Party of China and its capital is Beijing, the countrys major urban areas include Shanghai, Guangzhou, Beijing, Chongqing, Shenzhen, Tianjin and Hong Kong. China is a power and a major regional power within Asia. Chinas landscape is vast and diverse, ranging from forest steppes, the Himalaya, Karakoram, Pamir and Tian Shan mountain ranges separate China from much of South and Central Asia. The Yangtze and Yellow Rivers, the third and sixth longest in the world, respectively, Chinas coastline along the Pacific Ocean is 14,500 kilometers long and is bounded by the Bohai, Yellow, East China and South China seas. China emerged as one of the worlds earliest civilizations in the basin of the Yellow River in the North China Plain. For millennia, Chinas political system was based on hereditary monarchies known as dynasties, in 1912, the Republic of China replaced the last dynasty and ruled the Chinese mainland until 1949, when it was defeated by the communist Peoples Liberation Army in the Chinese Civil War. The Communist Party established the Peoples Republic of China in Beijing on 1 October 1949, both the ROC and PRC continue to claim to be the legitimate government of all China, though the latter has more recognition in the world and controls more territory. China had the largest economy in the world for much of the last two years, during which it has seen cycles of prosperity and decline. Since the introduction of reforms in 1978, China has become one of the worlds fastest-growing major economies. As of 2016, it is the worlds second-largest economy by nominal GDP, China is also the worlds largest exporter and second-largest importer of goods. China is a nuclear weapons state and has the worlds largest standing army. The PRC is a member of the United Nations, as it replaced the ROC as a permanent member of the U. N. Security Council in 1971. China is also a member of numerous formal and informal multilateral organizations, including the WTO, APEC, BRICS, the Shanghai Cooperation Organization, the BCIM, the English name China is first attested in Richard Edens 1555 translation of the 1516 journal of the Portuguese explorer Duarte Barbosa. The demonym, that is, the name for the people, Portuguese China is thought to derive from Persian Chīn, and perhaps ultimately from Sanskrit Cīna. Cīna was first used in early Hindu scripture, including the Mahābhārata, there are, however, other suggestions for the derivation of China. The official name of the state is the Peoples Republic of China. The shorter form is China Zhōngguó, from zhōng and guó and it was then applied to the area around Luoyi during the Eastern Zhou and then to Chinas Central Plain before being used as an occasional synonym for the state under the Qing
6.
Rock (geology)
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Rock or stone is a natural substance, a solid aggregate of one or more minerals or mineraloids. For example, granite, a rock, is a combination of the minerals quartz, feldspar. The Earths outer solid layer, the lithosphere, is made of rock, rock has been used by mankind throughout history. The minerals and metals found in rocks have been essential to human civilization, three major groups of rocks are defined, igneous, sedimentary, and metamorphic. The scientific study of rocks is called petrology, which is a component of geology. At a granular level, rocks are composed of grains of minerals, the aggregate minerals forming the rock are held together by chemical bonds. The types and abundance of minerals in a rock are determined by the manner in which the rock was formed, many rocks contain silica, a compound of silicon and oxygen that forms 74. 3% of the Earths crust. This material forms crystals with other compounds in the rock, the proportion of silica in rocks and minerals is a major factor in determining their name and properties. Rocks are geologically classified according to such as mineral and chemical composition, permeability, the texture of the constituent particles. These physical properties are the end result of the processes that formed the rocks, over the course of time, rocks can transform from one type into another, as described by the geological model called the rock cycle. These events produce three general classes of rock, igneous, sedimentary, and metamorphic, the three classes of rocks are subdivided into many groups. However, there are no hard and fast boundaries between allied rocks, hence the definitions adopted in establishing rock nomenclature merely correspond to more or less arbitrary selected points in a continuously graduated series. Igneous rock forms through the cooling and solidification of magma or lava and this magma can be derived from partial melts of pre-existing rocks in either a planets mantle or crust. Typically, the melting of rocks is caused by one or more of three processes, an increase in temperature, a decrease in pressure, or a change in composition, igneous rocks are divided into two main categories, plutonic rock and volcanic. Plutonic or intrusive rocks result when magma cools and crystallizes slowly within the Earths crust, a common example of this type is granite. Volcanic or extrusive rocks result from magma reaching the surface either as lava or fragmental ejecta, the chemical abundance and the rate of cooling of magma typically forms a sequence known as Bowens reaction series. Most major igneous rocks are found along this scale, about 64. 7% of the Earths crust by volume consists of igneous rocks, making it the most plentiful category. Of these, 66% are basalts and gabbros, 16% are granite, only 0. 6% are syenites and 0. 3% peridotites and dunites
7.
Wood
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Wood is a porous and fibrous structural tissue found in the stems and roots of trees, and other woody plants. It is a material, a natural composite of cellulose fibers which are strong in tension embedded in a matrix of lignin which resists compression. Wood is sometimes defined as only the secondary xylem in the stems of trees, in a living tree it performs a support function, enabling woody plants to grow large or to stand up by themselves. It also conveys water and nutrients between the leaves, other growing tissues, and the roots, Wood may also refer to other plant materials with comparable properties, and to material engineered from wood, or wood chips or fiber. In 2005, the stock of forests worldwide was about 434 billion cubic meters. As an abundant, carbon-neutral renewable resource, woody materials have been of intense interest as a source of renewable energy, in 1991 approximately 3.5 billion cubic meters of wood were harvested. Dominant uses were for furniture and building construction, a 2011 discovery in the Canadian province of New Brunswick discovered the earliest known plants to have grown wood, approximately 395 to 400 million years ago. Wood can be dated by carbon dating and in species by dendrochronology to make inferences about when a wooden object was created. People have used wood for millennia for many purposes, primarily as a fuel or as a material for making houses, tools, weapons, furniture, packaging, artworks. Constructions using wood date back ten thousand years, buildings like the European Neolithic long house were made primarily of wood. Recent use of wood has changed by the addition of steel. The year-to-year variation in tree-ring widths and isotopic abundances gives clues to the climate at that time. This process is known as growth, it is the result of cell division in the vascular cambium, a lateral meristem. These cells then go on to form thickened secondary cell walls, composed mainly of cellulose, hemicellulose, if the distinctiveness between seasons is annual, these growth rings are referred to as annual rings. Where there is little seasonal difference growth rings are likely to be indistinct or absent, if the bark of the tree has been removed in a particular area, the rings will likely be deformed as the plant overgrows the scar. It is usually lighter in color than that near the portion of the ring. The outer portion formed later in the season is known as the latewood or summerwood. However, there are differences, depending on the kind of wood
8.
Silk
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Silk is a natural protein fiber, some forms of which can be woven into textiles. The protein fiber of silk is composed mainly of fibroin and is produced by insect larvae to form cocoons. The best-known silk is obtained from the cocoons of the larvae of the mulberry silkworm Bombyx mori reared in captivity, Silk is produced by several insects, but generally only the silk of moth caterpillars has been used for textile manufacturing. There has been research into other types of silk, which differ at the molecular level. Silk is mainly produced by the larvae of insects undergoing complete metamorphosis, Silk production also occurs in Hymenoptera, silverfish, mayflies, thrips, leafhoppers, beetles, lacewings, fleas, flies, and midges. Other types of arthropod produce silk, most notably various arachnids such as spiders, the word silk comes from Old English sioloc, from Greek σηρικός serikos, silken, ultimately from an Asian source. Several kinds of silk, which are produced by caterpillars other than the mulberry silkworm, have been known and used in China, South Asia. However, the scale of production was far smaller than for cultivated silks. Thus, the way to obtain silk suitable for spinning into textiles in areas where commercial silks are not cultivated was by tedious. Commercial silks originate from reared silkworm pupae, which are bred to produce a silk thread with no mineral on the surface. The pupae are killed by either dipping them in boiling water before the adult moths emerge or by piercing them with a needle. These factors all contribute to the ability of the cocoon to be unravelled as one continuous thread. Wild silks also tend to be difficult to dye than silk from the cultivated silkworm. Genetic modification of domesticated silkworms is used to facilitate the production of more types of silk. Silk fabric was first developed in ancient China, the earliest example of silk fabric is from 3630 BC, and it was used as wrapping for the body of a child from a Yangshao culture site in Qingtaicun at Xingyang, Henan. Legend gives credit for developing silk to a Chinese empress, Leizu, because of its texture and lustre, silk rapidly became a popular luxury fabric in the many areas accessible to Chinese merchants. Silk was in demand, and became a staple of pre-industrial international trade. In July 2007, archaeologists discovered intricately woven and dyed silk textiles in a tomb in Jiangxi province, Silk is described in a chapter on mulberry planting by Si Shengzhi of the Western Han
9.
Bamboo
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The bamboos /bæmˈbuː/ are evergreen perennial flowering plants in the subfamily Bambusoideae of the grass family Poaceae. The dicotyledonous woody xylem is also absent, the absence of secondary growth wood causes the stems of monocots, including the palms and large bamboos, to be columnar rather than tapering. Bamboos include some of the plants in the world, due to a unique rhizome-dependent system. Certain species of bamboo can grow 91 cm within a 24-hour period, giant bamboos are the largest members of the grass family. Bamboos are of economic and cultural significance in South Asia, Southeast Asia and East Asia, being used for building materials, as a food source. Bamboo has a higher compressive strength than wood, brick, or concrete. The word bamboo comes from the Kannada term bambu, which was introduced to English through Indonesian, the subfamily in its current sense belongs to the BOP clade of grasses, where it is sister to the Pooideae. The woody bamboos do not form a group, instead. Altogether, more than 1,400 species are placed in 115 genera, most bamboo are native to warm and moist tropical and warm temperate climates. However, many species are found in climates, from hot tropical regions to cool mountainous regions. In the Asia-Pacific region they occur across East Asia, from 50°N latitude in Sakhalin south to Northern Australia, and west to India, China, Japan, Korea, India, and Australia, all have several endemic populations. They also occur in numbers in sub-Saharan Africa, confined to tropical areas, from southern Senegal in the north to southern Mozambique. Bamboo is also native through Central America and Mexico, northward into the Southeastern United States, canada and continental Europe is not known to have any native species of bamboo. Recently, some attempts have been made to grow bamboo on a basis in the Great Lakes region of east-central Africa. In the United States, several companies are growing, harvesting, bamboos include some of the fastest-growing plants on Earth, with reported growth rates up to 91 cm in 24 hours. Primarily growing in regions of warmer climates during the late Cretaceous period, some of the largest timber bamboo can grow over 30 m tall, and be as large as 25–30 cm in diameter. However, the range for mature bamboo is species-dependent, with the smallest bamboos reaching only several inches high at maturity. A typical height range that would cover many of the common bamboos grown in the United States is 4. 6–12 m, depending on species
10.
Zhou dynasty
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The Zhou dynasty was a Chinese dynasty that followed the Shang dynasty and preceded the Qin dynasty. This period of Chinese history produced what many consider the zenith of Chinese bronze-ware making, the dynasty also spans the period in which the written script evolved into its almost-modern form with the use of an archaic clerical script that emerged during the late Warring States period. He even received sacrifice as a harvest god, the term Hòujì was probably an hereditary title attached to a lineage. Jus son Liu, however, led his people to prosperity by restoring agriculture and settling them at a place called Bin, tai later led the clan from Bin to Zhou, an area in the Wei River valley of modern-day Qishan County. Taibo and Zhongyong had supposedly fled to the Yangtze delta. Jilis son Wen bribed his way out of imprisonment and moved the Zhou capital to Feng, the Zhou enfeoffed a member of the defeated Shang royal family as the Duke of Song, which was held by descendants of the Shang royal family until its end. This practice was referred to as Two Kings, Three Reverences, according to Nicholas Bodman, the Zhou appear to have spoken a language not basically different in vocabulary and syntax from that of the Shang. A recent study by David McCraw, using lexical statistics, reached the same conclusion, the Zhou emulated extensively Shang cultural practices, perhaps to legitimize their own rule, and became the successors to Shang culture. At the same time, the Zhou may also have connected to the Xirong, a broadly defined cultural group to the west of the Shang. According to the historian Li Feng, the term Rong during the Western Zhou period was used to designate political and military adversaries rather than cultural. The proto-Zhou were first located in the Shaanxi-Shanxi highland, where they absorbed elements from the Guangshe culture, King Liu moved his people to the lower Fen Valley and to the western bank of the Yellow River, where they resumed agriculture. His son Qing Jie, led the Zhou to the valley of the Jing River. They stayed there until Dan Fu moved again to the Wei Valley in order to avoid incursion by the Rongdi nomads. During this period, the Zhou mingled with the Qiang people, in all these stages, the advanced Shang bronze culture constantly imparted its influence on the Zhou. The Qi area was the region in all these influences would come to fruition. The contact among the proto-Zhou, the native Shaanxi Longshan, the Qiang, King Wu maintained the old capital for ceremonial purposes but constructed a new one for his palace and administration nearby at Hao. Although Wus early death left a young and inexperienced heir, the Duke of Zhou assisted his nephew King Cheng in consolidating royal power. Wary of the Duke of Zhous increasing power, the Three Guards, Zhou princes stationed on the eastern plain, to maintain Zhou authority over its greatly expanded territory and prevent other revolts, he set up the fengjian system
11.
Metal
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A metal is a material that is typically hard, opaque, shiny, and has good electrical and thermal conductivity. Metals are generally malleable—that is, they can be hammered or pressed permanently out of shape without breaking or cracking—as well as fusible and ductile, about 91 of the 118 elements in the periodic table are metals, the others are nonmetals or metalloids. Some elements appear in both metallic and non-metallic forms, astrophysicists use the term metal to collectively describe all elements other than hydrogen and helium, the simplest two, in a star. The star fuses smaller atoms, mostly hydrogen and helium, to larger ones over its lifetime. In that sense, the metallicity of an object is the proportion of its matter made up of all chemical elements. Many elements and compounds that are not normally classified as metals become metallic under high pressures, the atoms of metallic substances are typically arranged in one of three common crystal structures, namely body-centered cubic, face-centered cubic, and hexagonal close-packed. In bcc, each atom is positioned at the center of a cube of eight others, in fcc and hcp, each atom is surrounded by twelve others, but the stacking of the layers differs. Some metals adopt different structures depending on the temperature, atoms of metals readily lose their outer shell electrons, resulting in a free flowing cloud of electrons within their otherwise solid arrangement. This provides the ability of metallic substances to easily transmit heat, while this flow of electrons occurs, the solid characteristic of the metal is produced by electrostatic interactions between each atom and the electron cloud. This type of bond is called a metallic bond, Metals are usually inclined to form cations through electron loss, reacting with oxygen in the air to form oxides over various timescales. Examples,4 Na + O2 →2 Na2O2 Ca + O2 →2 CaO4 Al +3 O2 →2 Al2O3, the transition metals are slower to oxidize because they form a passivating layer of oxide that protects the interior. Others, like palladium, platinum and gold, do not react with the atmosphere at all, some metals form a barrier layer of oxide on their surface which cannot be penetrated by further oxygen molecules and thus retain their shiny appearance and good conductivity for many decades. The oxides of metals are generally basic, as opposed to those of nonmetals, exceptions are largely oxides with very high oxidation states such as CrO3, Mn2O7, and OsO4, which have strictly acidic reactions. Painting, anodizing or plating metals are good ways to prevent their corrosion, however, a more reactive metal in the electrochemical series must be chosen for coating, especially when chipping of the coating is expected. Water and the two form an electrochemical cell, and if the coating is less reactive than the coatee. Metals in general have high conductivity, high thermal conductivity. Typically they are malleable and ductile, deforming under stress without cleaving, in terms of optical properties, metals are shiny and lustrous. Sheets of metal beyond a few micrometres in thickness appear opaque, although most metals have higher densities than most nonmetals, there is wide variation in their densities, lithium being the least dense solid element and osmium the densest
12.
Gourd
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A gourd is a plant of the family Cucurbitaceae, particularly Cucurbita and Lagenaria or the fruit of the two genera of Bignoniaceae calabash tree, Crescentia and Amphitecna. The term refers to a number of species and subspecies, many with hard shells, likely one of the earliest domesticated types of plants, subspecies of the bottle gourd, Lagenaria siceraria, have been discovered in archaeological sites dating from as early as 13,000 BC. Gourds have had numerous uses throughout history, including as tools, musical instruments, objects of art, film, gourd is occasionally used to describe crop plants in the family Cucurbitaceae, like pumpkins, cucumbers, squash, luffa, and melons. More specifically, gourd refers to the fruits of plants in the two Cucurbitaceae genera Lagenaria and Cucurbita, or also to their hollow, dried-out shell, a gourd can also have a hard shell when dehydrated. There are many different gourds worldwide, the main plants referred to as gourds include several species from the Cucurbita genus, Crescentia cujete and Lagenaria siceraria. The bitter melon/balsam apple/balsam pear is also referred to as a gourd. L. siceraria was brought to Europe and the Americas very early in history, being found in Peruvian archaeological sites dating from 13,000 to 11,000 BC and Thailand sites from 11,000 to 6,000 BC. The gourds found in the Americas appear to have come from the Asian subspecies, very early in history, a new study now indicates Africa. The archaeological and DNA records show it likely that the gourd was among the first domesticated species, gourds continued to be used throughout history, in almost every culture throughout the world. European contact in North America found extensive use, including the use of bottle gourds as birdhouses to attract purple martins. Almost every culture had musical instruments made of gourds, including drums, stringed instruments common to Africa and wind instruments and these include Teasle gourd, Spine gourd, Sweet gourd, balsam apple and Momordica sahyadrica. Cultures from arid regions often associated gourds with water, and they appear in creation myths. Since the beginning of their history, they have had a multitude of uses, including food, kitchen tools, toys, musical instruments and decoration. Today, gourds are used for a wide variety of crafts, including jewelry, furniture, dishes, utensils. The Chinese developed a technique of tying a two-part mould around young gourds, or a part of them, so that the gourd grew into the mould, shaped gourds had various decorative uses, especially as boxes, bottles and other containers. The Luffa gourds, Luffa aegyptiaca and Luffa acutangula, have been used throughout recent history as scrubbing sponge and this is prepared by removing the skin and pulp from the gourd, and bleaching the fibers. A güiro is a Latin American percussion instrument made from a gourd, maracas are percussion instruments often made from gourds. A sitar is a stringed instrument, parts of which are made from gourds
13.
Clay
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Clay is a fine-grained natural rock or soil material that combines one or more clay minerals with traces of metal oxides and organic matter. Geologic clay deposits are composed of phyllosilicate minerals containing variable amounts of water trapped in the mineral structure. Clays are plastic due to water content and become hard, brittle. Depending on the content in which it is found, clay can appear in various colours from white to dull grey or brown to deep orange-red. Although many naturally occurring deposits include both silts and clay, clays are distinguished from other fine-grained soils by differences in size, silts, which are fine-grained soils that do not include clay minerals, tend to have larger particle sizes than clays. There is, however, some overlap in size and other physical properties. The distinction between silt and clay varies by discipline, geologists and soil scientists usually consider the separation to occur at a particle size of 2 µm, sedimentologists often use 4–5 μm, and colloid chemists use 1 μm. Geotechnical engineers distinguish between silts and clays based on the plasticity properties of the soil, as measured by the soils Atterberg limits, ISO14688 grades clay particles as being smaller than 2 μm and silt particles as being larger. These solvents, usually acidic, migrate through the rock after leaching through upper weathered layers. In addition to the process, some clay minerals are formed through hydrothermal activity. There are two types of deposits, primary and secondary. Primary clays form as residual deposits in soil and remain at the site of formation, secondary clays are clays that have been transported from their original location by water erosion and deposited in a new sedimentary deposit. Clay deposits are associated with very low energy depositional environments such as large lakes. Depending on the source, there are three or four main groups of clays, kaolinite, montmorillonite-smectite, illite, and chlorite. Chlorites are not always considered to be a clay, sometimes being classified as a group within the phyllosilicates. There are approximately 30 different types of clays in these categories. Varve is clay with visible annual layers, which are formed by deposition of those layers and are marked by differences in erosion. This type of deposit is common in glacial lakes
14.
Leather
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Leather is a durable and flexible material created by tanning animal rawhide and skin, often cattle hide. It can be produced at manufacturing scales ranging from cottage industry to heavy industry, people use leather to make various goods—including clothing, bookbinding, leather wallpaper, and as a furniture covering. It is produced in a variety of types and styles. Several tanning processes transform hides and skins into leather, Chrome-tanned leather, invented in 1858, is tanned using chromium sulfate and it is more supple and pliable than vegetable-tanned leather and does not discolor or lose shape as drastically in water as vegetable-tanned. It is also known as wet-blue for its color derived from the chromium, more exotic colors are possible when using chrome tanning. The chrome tanning method usually only takes a day to finish, and it is reported that chrome-tanned leather adds up to 80% of the global leather supply. Vegetable-tanned leather is tanned using tannins and other found in different vegetable matter, such as tree bark prepared in bark mills, wood, leaves, fruits. It is supple and brown in color, with the exact shade depending on the mix of chemicals and it is the only form of leather suitable for use in leather carving or stamping. Vegetable-tanned leather is not stable in water, it tends to discolor, so if left to soak and then dried it shrinks, in hot water, it shrinks drastically and partly congeals—becoming rigid, and eventually brittle. Boiled leather is an example of this, where the leather has been hardened by being immersed in hot water, historically, it was occasionally used as armour after hardening, and it has also been used for book binding. Aldehyde-tanned leather is tanned using glutaraldehyde or oxazolidine compounds and this is the leather that most tanners refer to as wet-white leather due to its pale cream or white color. It is the type of chrome-free leather, often seen in shoes for infants. Formaldehyde tanning is another aldehyde tanning method, brain-tanned leathers fall into this category, and are exceptionally water absorbent. Brain tanned leathers are made by a process that uses emulsified oils, often those of animal brains such as deer, cattle. They are known for their softness and washability. Chamois leather also falls into the category of aldehyde tanning, and like brain tanning, produces a porous, chamois leather is made using marine oils that oxidize easily to produce the aldehydes that tan the leather to color it. Rose-tanned leather is a variation of oil tanning and brain tanning. Rose-tanned leather tanned leaves a powerful rose fragrance even years from when it is manufactured and it has been called the most valuable leather on earth, but this is mostly due to the high cost of rose otto and its labor-intensive tanning process
15.
Rites of Zhou
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The Rites of Zhou, originally known as Officers of Zhou is actually a work on bureaucracy and organizational theory. It was renamed by Liu Xin to differentiate it from a chapter in the Book of History by the same name. To replace a lost work, it was included along with the Book of Rites and the Etiquette and Ceremonial – becoming one of three ancient ritual texts listed among the classics of Confucianism. The book appeared in the middle of the 2nd century BC, when it was found and included in the collection of Old Texts in the library of Prince Liu De and its first editor was Liu Xin, who credited it to the Duke of Zhou. Tradition since at least the Song dynasty continued this attribution, with the claim that Liu Xins edition was the final one. In the 12th century, it was given recognition by being placed among the Five Classics as a substitute for the long-lost sixth work. In the late 19th and early 20th centuries, following Kang Youwei, currently, a few holdouts continue to insist on a Western Zhou date while the majority follow Qian Mu and Gu Jiegang in assigning the work to about the 3rd century BC. The work consists mainly of lists of Zhou dynasty bureaucrats, stating what the function of each office is. Sometimes though the mechanical listing is broken off by pieces of philosophical exposition on how a given office contributes to social harmony, the division of chapters follows the six departments of the Zhou dynasty government. The bureaucrats within a department come in five ranks, minister, councilor, senior clerk, middle clerk, there is only one minister per department -the department head-, but the other four ranks all have multiple holders spread across various specific professions. A part of the Winter Offices, the Record of Trades, contains important information on technology, architecture, city planning, a passage records that, The master craftsman constructs the state capital. He makes a square nine li on one side, each side has three gates, within the capital are nine north-south and nine east-west streets. The north-south streets are nine tracks in width. New examinations on the composition of the Zhouguan and on the culture, nylan, Michael, The Five Confucian Classics, New Haven,2001, ISBN 0-300-08185-5, Chapter 4, The Three Rites Canon pp. 168–202. Boltz, William G. Chou li in, Early Chinese Texts, a Biliographical Guide, pp. 24–32, Berkeley, Society for the Study of Early China,1993, ISBN 1-55729-043-1. Karlgren, Bernhard, The Early History of the Chou li and Tso chuan Texts in, Bulletin of the Museum of Far Eastern Antiquites,3, pp. 1–59 Rites of Zhou Rites of Zhou
16.
Zuo zhuan
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It comprises thirty chapters covering a period from 722 to 468 BC, and focuses mainly on political, diplomatic, and military affairs from that era. The Zuo zhuan was, for centuries, the primary text through which the Chinese gained an understanding of their ancient history. The Zuo zhuan is the source of more Chinese sayings and idioms than any other classical work, notwithstanding its prominent position throughout Chinese history as the paragon of Classical Chinese prose, little is known of the Zuo zhuans creation and early history. Its earliest known mention appears in Sima Qians Records of the Grand Historian, the first of Chinas twenty-four dynastic histories, which was completed about 94 BC. Other than his mention in the Analects, nothing is concretely known of Zuo Qiumings life or identity. This traditional assumption that the titles Master Zuo refers to the Zuo Qiuming of the Analects is not based on any specific evidence, in 1792, the scholar Yao Nai wrote, The text did not come from one person. There were repeated accretions and additions, with those of Wu Qi, in the early 1930s, the French Sinologist Henri Maspero performed a detailed textual study of the issue, concluding the Han dynasty forgery theory to be untenable. While Lius hypothesis that the Zuo zhuan was not originally an Annals commentary has been generally accepted, four of the fragments date to the Six Dynasties period, while the other two date to the early Tang dynasty. The oldest known complete Zuo zhuan manuscript is the ancient manuscript scroll preserved at the Kanazawa Bunko Museum in Yokohama, the Zuo zhuan recounts the major political, military, and social events of the Spring and Autumn period, and is famous for its dramatic power and realistic details. The Zuo zhuan originally contained only its content, without any content from or references to the Spring. In the 3rd century AD, the Chinese scholar Du Yu intercalated the Annals into the Zuo zhuan and its overarching theme is that haughty, evil, and stupid individuals generally bring disaster upon themselves, while those who are good, wise, and humble are usually justly rewarded. The Confucian principle of ritual propriety or ceremony is seen as governing all actions, including war, however, the observance of li is never shown as guaranteeing victory, and the Zuo zhuan includes many examples of the good and innocent suffering senseless violence. Much of the Zuo zhuans status as a literary masterpiece stems from its realistic portrayal of a turbulent era marked by violence, political strife, intrigues. The narratives of the Zuo zhuan are highly didactic in nature, several of the Zuo zhuans most famous sections are those dealing with critical historical battles, such as the Battle of Chengpu and the Battle of Bi. The Battle of Chengpu, the first of the Zuo zhuans great battles, on one side were the troops of the powerful State of Chu, from what was then far southern China, led by the Chu prime minister Cheng Dechen. They were opposed by the armies of the State of Jin, led by Chonger, Duke of Jin, one of the most prominent, Chu suffered a disastrous defeat in the battle itself, and it resulted in Chonger being named Hegemon of the various states. Several of the most notable passages in the Zuo zhuan describe succession crises, the best known of these stories is that of Duke Zhuang of Zheng, who ruled the State of Zheng from 743 to 701 BC. Duke Zhuang was born in a manner that startled his mother, a number of Zuo zhuan anecdotes end with brief moral comments or verdicts that are attributed to either Confucius or an unnamed junzi
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Tso Chiu-Ming
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Zuo Qiuming was a Chinese writer and contemporary of Confucius who lived in the State of Lu during the Spring and Autumn period of ancient China. It is uncertain whether his surname is Zuo or Zuoqiu, therefore the name may be written as Zuo Qiuming or Zuoqiu Ming, the influential historical text Zuo Zhuan is traditionally attributed to him. He is also possibly a contributor to Guoyu, one tradition, according to the Records of the Grand Historian, holds that he was blind. Zuo is quoted in the Analects to be a paragon of the conduct of Confucius, the Master said, Fine words, an insinuating appearance, and excessive respect - Zuo Qiuming was ashamed of them. I also am ashamed of them, to conceal resentment against a person, and appear friendly with him - Zuo Qiuming was ashamed of such conduct
18.
Ming dynasty
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The Ming dynasty was the ruling dynasty of China – then known as the Empire of the Great Ming – for 276 years following the collapse of the Mongol-led Yuan dynasty. The Ming, described by some as one of the greatest eras of orderly government, although the primary capital of Beijing fell in 1644 to a rebellion led by Li Zicheng, regimes loyal to the Ming throne – collectively called the Southern Ming – survived until 1683. He rewarded his supporters and employed them as a counterweight against the Confucian scholar-bureaucrats. One, Zheng He, led seven enormous voyages of exploration into the Indian Ocean as far as Arabia, the rise of new emperors and new factions diminished such extravagances, the capture of the Zhengtong Emperor during the 1449 Tumu Crisis ended them completely. The imperial navy was allowed to fall into disrepair while forced labor constructed the Liaodong palisade, haijin laws intended to protect the coasts from Japanese pirates instead turned many into smugglers and pirates themselves. The growth of Portuguese, Spanish, and Dutch trade created new demand for Chinese products and produced an influx of Japanese. This abundance of specie remonetized the Ming economy, whose money had suffered repeated hyperinflation and was no longer trusted. While traditional Confucians opposed such a prominent role for commerce and the newly rich it created, combined with crop failure, floods, and epidemic, the dynasty collapsed before the rebel leader Li Zicheng, who was defeated by the Manchu-led Eight Banner armies who founded the Qing dynasty. The Mongol-led Yuan dynasty ruled before the establishment of the Ming dynasty, consequently, agriculture and the economy were in shambles, and rebellion broke out among the hundreds of thousands of peasants called upon to work on repairing the dykes of the Yellow River. A number of Han Chinese groups revolted, including the Red Turbans in 1351, the Red Turbans were affiliated with the White Lotus, a Buddhist secret society. Zhu Yuanzhang was a peasant and Buddhist monk who joined the Red Turbans in 1352. In 1356, Zhus rebel force captured the city of Nanjing, with the Yuan dynasty crumbling, competing rebel groups began fighting for control of the country and thus the right to establish a new dynasty. In 1363, Zhu Yuanzhang eliminated his archrival and leader of the rebel Han faction, Chen Youliang, in the Battle of Lake Poyang, arguably the largest naval battle in history. Known for its ambitious use of ships, Zhus force of 200,000 Ming sailors were able to defeat a Han rebel force over triple their size, claimed to be 650. The victory destroyed the last opposing rebel faction, leaving Zhu Yuanzhang in uncontested control of the bountiful Yangtze River Valley, Zhu Yuanzhang took Hongwu, or Vastly Martial, as his era name. Hongwu made an effort to rebuild state infrastructure. He built a 48 km long wall around Nanjing, as well as new palaces, Hongwu organized a military system known as the weisuo, which was similar to the fubing system of the Tang dynasty. With a growing suspicion of his ministers and subjects, Hongwu established the Jinyiwei, some 100,000 people were executed in a series of purges during his rule
19.
Zhu Zaiyu
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Zhu Zaiyu was a prince of the Ming dynasty of China. In 1584, Prince Zhu innovatively described the equal temperament via accurate mathematical calculation, Zhu was born in Qinyang, Henan Province to an aristocratic family, the sixth-generation descendant of the Hongxi Emperor, the fourth emperor of the Ming Dynasty. Zhu inherited the title the Prince of Zheng in 1593, on the emperors order, he was granted a new princely title in 1606, the year he delivered a set of ten musicological treatises to the court, establishing his scholarly merit. His posthumous name was 鄭端靖世子 Zhu wrote on music theory and temperament, music history, dance and dance music, three music theory works in particular are associated with the ideas of equal temperament, the「律學新說」, 「律呂精義」, and 「算學新說」. His work has described as the crowning achievement of two millennia of acoustical experiment and research and he is described as one of the most important historians of his nations music. Zhang Heng Book of Songs Jing Fang Shen Kuo Equal temperament Shí-èr-lǜ Chinese mathematics Chinese musicology
20.
Rhythm
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Rhythm generally means a movement marked by the regulated succession of strong and weak elements, or of opposite or different conditions. In the performance arts, rhythm is the timing of events on a scale, of musical sounds and silences that occur over time, of the steps of a dance, or the meter of spoken language. In some performing arts, such as hip hop music, the delivery of the lyrics is one of the most important elements of the style. Rhythm may also refer to visual presentation, as timed movement through space, in recent years, rhythm and meter have become an important area of research among music scholars. Recent work in these areas includes books by Maury Yeston, Fred Lerdahl and Ray Jackendoff, Jonathan Kramer, Christopher Hasty, Godfried Toussaint, William Rothstein, and Joel Lester. In Thinking and Destiny, Harold W. Percival defined rhythm as the character and meaning of thought expressed through the measure or movement in sound or form, or by written signs or words. In his television series How Music Works, Howard Goodall presents theories that human rhythm recalls the regularity with which we walk, other research suggests that it does not relate to the heartbeat directly, but rather the speed of emotional affect, which also influences heartbeat. Yet other researchers suggest that certain features of human music are widespread. The perception and abstraction of rhythmic measure is the foundation of human instinctive musical participation, Joseph Jordania recently suggested that the sense of rhythm was developed in the early stages of hominid evolution by the forces of natural selection. Plenty of animals walk rhythmically and hear the sounds of the heartbeat in the womb, some types of parrots can know rhythm. There is not a report of an animal being trained to tap, peck. For this reason, the fast-transient sounds of percussion instruments lend themselves to the definition of rhythm, Musical cultures that rely upon such instruments may develop multi-layered polyrhythm and simultaneous rhythms in more than one time signature, called polymeter. Such are the cross-rhythms of Sub-Saharan Africa and the interlocking kotekan rhythms of the gamelan, for information on rhythm in Indian music see Tala. For other Asian approaches to rhythm see Rhythm in Persian music, Rhythm in Arabian music and Usul—Rhythm in Turkish music and this consists of a series of identical yet distinct periodic short-duration stimuli perceived as points in time. It is currently most often designated as a crotchet or quarter note in western notation, faster levels are division levels, and slower levels are multiple levels. Rhythms of recurrence arise from the interaction of two levels of motion, the faster providing the pulse and the slower organizing the beats into repetitive groups. Once a metric hierarchy has been established, we, as listeners, a durational pattern that synchronises with a pulse or pulses on the underlying metric level may be called a rhythmic unit. A rhythmic gesture is any pattern that, in contrast to the rhythmic unit
21.
Audio editing software
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Audio editing software is software which allows editing and generating of audio data. Audio editing software can be implemented completely or partly as library, as computer application, wave Editors are digital audio editors and there are many sources of software available to perform this function. Most can edit music, apply effects and filters, adjust stereo channels etc, Editors designed for use with music typically allow the user to do the following, The ability to import and export various audio file formats for editing. Audio editors may process the audio data non-destructively in real-time, or destructively as a process, or a hybrid with some real-time effects. Destructive editing modifies the data of the audio file, as opposed to just editing its playback parameters. Destructive editors are also known as sample editors, destructive editing applies edits and processing directly to the audio data, changing the data immediately. If, for example, part of a track is deleted, real-time editing does not apply changes immediately, but applies edits and processing on the fly during playback. If, for example, part of a track is deleted, the audio data is not actually removed from the track. In graphical editors, all changes to the audio is usually visible immediately as the waveform is updated to match the audio data. The number of effects that may be applied is virtually unlimited, editing is usually precise down to exact sample intervals. Effects may be applied to a precisely specified selected region, mixing down or exporting the edited audio is usually relatively quick as little additional processing is required. Once an effect has been applied, it cannot usually be changed and this is usually mitigated by the ability to undo the last performed action. Typically a destructive audio editor will maintain many levels of history so that multiple actions may be undone in the reverse order that they were applied. Edits can only be undone in the order that they were applied. Effects can usually be adjusted during playback, or at any other time, edits may be undone or adjusted at any time in any order. Multiple effects and edits may be stacked so that they are applied to the audio as an effect chain, a stack of effects may be changed so that effects are applied in a different order, or effects inserted or removed from the chain. Some real-time editors support effect automation so that changes to effect parameters may be programmed to occur at specified times during audio playback, the waveform does not usually show the effect of processing until the audio has been mixed-down or bounced to another track. The number of effects that may be applied is limited by the processing power of the computer or editing hardware
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Effects unit
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An effects unit or pedal is an electronic or digital device that alters how a musical instrument or other audio source sounds. In the 2010s, most effects use solid state electronics and/or computer chips, some vintage effects units from the 1930s to the 1970s and modern reissues of these effects use mechanical components as well or vacuum tubes. Musicians, audio engineers and record producers use effects units during live performances or in the studio, typically with electric guitar, electronic keyboard, while guitar effects are most frequently used with electric or electronic instruments, effects can also be used with acoustic instruments, drums and vocals. Rackmounted or audio console-integrated reverb effects are used with vocals in live sound and sound recording. Examples of common units include wah-wah pedals, fuzzboxes and reverb units. A stompbox or pedal is a metal or plastic box placed on the floor in front of the musician and connected to the instrument. Pedals are usually the least expensive format, a rackmount device mounts on a standard 19-inch equipment rack and usually contains several types of effects. Rackmount effects typically have buttons and/or knobs on the face of the chassis for controlling the effects, an effects unit is also called an effect box, effects device, effects processor or simply effects. In audio engineer parlance, a signal without effects is dry, the abbreviation F/X or FX is sometimes used. A pedal-style unit may be called a box, stompbox. When a musician has multiple effects in a rack mounted road case, Effects units are available in a variety of formats or form factors. Stompboxes are usually the smallest, least expensive, and most rugged effects units, rackmount devices are generally more expensive and offer a wider range of functions. An effects unit can consist of analog or digital circuitry or a combination of the two, during a live performance, the effect is plugged into the electrical signal path of the instrument. In the studio, the instrument or other sound-sources auxiliary output is patched into the effect, form factors are part of a studio or musicians outboard gear. Stompboxes are small plastic or metal chassis which usually lie on the floor or in a pedalboard to be operated by the users feet, pedals are often rectangle-shaped, but there are a range of other shapes. Typical simple stompboxes have a single footswitch, one to three potentiometers for controlling the effect, and a single LED that indicates if the effect is on, depending on the type of pedal, the potentiometers may control different parameters of the effect. For a chorus effect, for example, the knobs may control the depth, some pedals have two knobs stacked on top of each other, enabling the unit to provide two knobs per single knob space. An effects chain or signal chain is formed by connecting two or more stompboxes, effect chains are typically created between the guitar and the amp or between the preamplifier and the power amp
23.
Ancient Greece
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Ancient Greece was a civilization belonging to a period of Greek history from the Greek Dark Ages of the 12th-9th centuries BC to the end of antiquity. Immediately following this period was the beginning of the Early Middle Ages and this was followed by the period of Classical Greece, an era that began with the Greco-Persian Wars, lasting from the 5th to 4th centuries BC. Due to the conquests by Alexander the Great of Macedonia, Hellenistic civilization flourished from Central Asia to the end of the Mediterranean Sea. Classical Greek culture, especially philosophy, had a influence on ancient Rome. For this reason Classical Greece is generally considered to be the culture which provided the foundation of modern Western culture and is considered the cradle of Western civilization. Classical Antiquity in the Mediterranean region is considered to have begun in the 8th century BC. Classical Antiquity in Greece is preceded by the Greek Dark Ages and this period is succeeded, around the 8th century BC, by the Orientalizing Period during which a strong influence of Syro-Hittite, Jewish, Assyrian, Phoenician and Egyptian cultures becomes apparent. The end of the Dark Ages is also dated to 776 BC. The Archaic period gives way to the Classical period around 500 BC, Ancient Periods Astronomical year numbering Dates are approximate, consult particular article for details The history of Greece during Classical Antiquity may be subdivided into five major periods. The earliest of these is the Archaic period, in which artists made larger free-standing sculptures in stiff, the Archaic period is often taken to end with the overthrow of the last tyrant of Athens and the start of Athenian Democracy in 508 BC. It was followed by the Classical period, characterized by a style which was considered by observers to be exemplary, i. e. classical, as shown in the Parthenon. This period saw the Greco-Persian Wars and the Rise of Macedon, following the Classical period was the Hellenistic period, during which Greek culture and power expanded into the Near and Middle East. This period begins with the death of Alexander and ends with the Roman conquest, Herodotus is widely known as the father of history, his Histories are eponymous of the entire field. Herodotus was succeeded by authors such as Thucydides, Xenophon, Demosthenes, Plato, most of these authors were either Athenian or pro-Athenian, which is why far more is known about the history and politics of Athens than those of many other cities. Their scope is limited by a focus on political, military and diplomatic history, ignoring economic. In the 8th century BC, Greece began to emerge from the Dark Ages which followed the fall of the Mycenaean civilization, literacy had been lost and Mycenaean script forgotten, but the Greeks adopted the Phoenician alphabet, modifying it to create the Greek alphabet. The Lelantine War is the earliest documented war of the ancient Greek period and it was fought between the important poleis of Chalcis and Eretria over the fertile Lelantine plain of Euboea. Both cities seem to have suffered a decline as result of the long war, a mercantile class arose in the first half of the 7th century BC, shown by the introduction of coinage in about 680 BC
