The term "half dollar" refers to a half-unit of several currencies that are named "dollar". $1 is divided into 100 cents, so a half dollar is equal to 50 cents. Coins and/or banknotes of that amount are as such denominated at a value of 50 cents. More than a dozen countries have their own unique dollar currency, out of these not all use the 50 cent piece or half dollar. 50-cent piece Fifty cent coin Half dollar Franklin half dollar Kennedy Half Dollar New Zealand fifty-cent coin Walking Liberty Half Dollar
A spindle is a straight spike made from wood used for spinning, twisting fibers such as wool, hemp, cotton into yarn. It is weighted at either the bottom, middle, or top by a disc or spherical object called a whorl, but many spindles exist that are not weighted by a whorl, but by thickening their shape towards the bottom, such as Orenburg and French spindles; the spindle may have a hook, groove, or notch at the top to guide the yarn. Spindles come in many different sizes and weights depending on the thickness of the yarn one desires to spin; the origin of the first wooden spindle is lost to history. Whorl-weighted spindles date back at least to Neolithic times. A spindle is part of traditional spinning wheels where it is horizontal, such as the Indian charkha and the great or walking wheel. In industrial yarn production, spindles are used as well; the wood traditionally favoured for making spindles was that of Euonymus europaeus, from which derives the traditional English name spindle bush. Modern hand spindles fall into three basic categories: suspended spindles, supported spindles and grasped spindles.
Supported and suspended spindles are held vertically, grasped spindles may be held vertically, horizontally or at an angle depending on the tradition. Suspended spindles are so named because they are suspended to swing from the yarn after rotation has been started. Drop Spindles are a popular type of suspended spindle and get their name because the spindle is allowed to drop down while the thread is formed, allowing for a greater length of yarn to be spun before winding on. Suspended spindles permit the spinner to move around while spinning, going about their day. However, there are practical limits to their size/weight. Most supported spindles continue to rest with the tip on one's thigh, on the ground, on a table, or in a small bowl while rotating. Supported spindles come in a great variety of sizes, such as the large, ~30" Navajo spindle, the small fast, metal takli for spinning cotton, the tiniest Orenburg spindles for spinning gossamer lace yarns. Grasped spindles are known as hand spindles, in the hand spindles, in hand spindles and twiddled spindles.
Grasped spindles remain held in the hand using wrist movements to turn the spindle. French spindles are "twiddled" between the fingers of one hand while some types of Romanian spindles are grasped in the fist and turned through rotation of the wrist. While spindle types are divided into these three main categories, some traditional spinning styles employ multiple or blended techniques. For example the Akha spindle, a short spindle with a large centre-whorl disc, is supported by the hand of the spinner during drafting of cotton fibre, but during the adding of extra twist to stabilize the yarn, the spindle is dropped to rest on the yarn. A familiar sight from history books is a spindle used in conjunction with a distaff, an upright stick with a large quantity of loose fibre wound around it, to be accessed. There are many other methods for controlling the pre-spun fibre, such as coiling it around one's lower arm, or through a bracelet, or wrapping it loosely around a yarn braid hanging from one's wrist.
Another way spindles are categorised. The whorl, where present, may be located near the bottom or centre of the spindle. For example a top-whorl drop spindle will have the whorl located near the top of the shaft underneath a hook that allows the spindle to suspend as it is being spun; the newly spun yarn is wound below the whorl and forms a ‘cop’. Depending on the location of the whorl and style of the spindle, the cop can be conical, football or ball shaped and it can be wound above, below or over the whorl. Spindles can be used for plying: intertwining two or more single strands of yarn together in order to create a stronger, more balanced, more durable yarn. While hand spindles vary, there are some similarities in the parts. Spindle shafts can be made out of a variety of materials such as wood, bone or plastic, they may have little shaping or be shaped enough to form part of the whorl. Shafts may be decorated with painting or carving; the shaft is how the spinner inserts twist through turning it between the fingers or rolling it between the hand and another part of their anatomy, such as their thigh.
The thickness of the shaft affects how fast the spindles spins with narrower shafts contributing to a faster spinning spindle. Many spindles will have a point at the top of the shaft to fix the thread to. Options include a simple length of shaft to tie the thread around, a shaped notch or bulb, or a hook. A whorl is a weight, added to many types of spindles and can be made out of a large variety of materials including wood, glass, stone, clay or bone. Whorls may be decorated or left plain, they may be affixed permanently to the shaft or they may be removable. Whorl shapes vary and can include ball-shaped, disk-shaped and cross shaped whorls; the shape and mass distribution of the whorl affects the momentum it gives to the spindle while it is spinning. For example a centre weighted whorl will spin fast and short, while a rim-weighte
A distaff is a tool used in spinning. It is designed to hold the unspun fibers, keeping them untangled and thus easing the spinning process, it is most used to hold flax, sometimes wool, but can be used for any type of fiber. Fiber is wrapped around the distaff, tied in place with a piece of ribbon or string; the word comes from dis in Low German. As an adjective the term distaff is used to describe the female side of a family. In Western Europe there were two common forms of distaves, depending on the spinning method; the traditional form is a staff, held under one's arm while using a spindle. It held under the left arm, with the left hand drawing the fibers from it; this version is the older of the two. A distaff can be mounted as an attachment to a spinning wheel. On a wheel it is placed next to the bobbin; this version is shorter, but otherwise does not differ from the spindle version. By contrast, the traditional Russian distaff, used both with spinning wheels and spindles, is L-shaped, consists of a horizontal board, known as the dontse, a flat vertical piece oar-shaped, to the inner side of which the bundle of fibers was tied or pinned.
The spinner sat on the dontse with the vertical piece of the distaff to her left, drew the fibers out with her left hand. The distaff was richly carved and painted, was an important element of Russian folk art. Handspinners have begun using wrist-distaves to hold their fiber, they consist of a loop with a tail, at the end of, a tassel with beads on each strand. The spinner wraps the roving or tow around the tail and through the loop to keep it out of the way, to keep it from getting snagged. Dressing a distaff is the act of wrapping the fiber around the distaff. With flax, the wrapping is done by laying the flax fibers down parallel to each other and the distaff carefully rolling the fibers onto the distaff. A ribbon or string is tied at the top, loosely wrapped around the fibers to keep them in place; the term distaff is used as an adjective to describe the matrilineal branch of a family. This term developed in the English-speaking communities where a distaff spinning tool was used to symbolize domestic life.
One still recognized use of the term is in horse racing, in which races limited to female horses are referred to as distaff races. From 1984 until 2007, at the American Breeders' Cup World Championships, the major race for fillies and mares was the Breeders' Cup Distaff, it is regarded as the female analog to the better-known Breeders' Cup Classic, though female horses are not barred from entering that race. In Norse mythology the goddess Frigg spins clouds from her bejewelled distaff in the Norse constellation known as Frigg's Spinning Wheel; the Women's division of the mixed-martial-arts organization EXC is known as the "Distaff Division". In the video game Loom by Lucasfilm Games, the Weavers' Guild, the game's equivalent to wizards, the main character, Bobbin Threadbare, uses wooden staves called "distaffs" to control their magic, described as "weav the fabric of reality". Distaff Day Spindle Instructions on making a recycled sock wrist-distaff
California Gold Rush
The California Gold Rush began on January 24, 1848, when gold was found by James W. Marshall at Sutter's Mill in Coloma, California; the news of gold brought 300,000 people to California from the rest of the United States and abroad. The sudden influx of gold into the money supply reinvigorated the American economy, the sudden population increase allowed California to go to statehood, in the Compromise of 1850; the Gold Rush had severe effects on Native Californians and resulted in a precipitous population decline from disease and starvation. By the time it ended, California had gone from a thinly populated ex-Mexican territory, to having one of its first two U. S. Senators, John C. Frémont, selected to be the first presidential nominee for the new Republican Party, in 1856; the effects of the Gold Rush were substantial. Whole indigenous societies were attacked and pushed off their lands by the gold-seekers, called "forty-niners". Outside of California, the first to arrive were from Oregon, the Sandwich Islands, Latin America in late 1848.
Of the 300,000 people who came to California during the Gold Rush, about half arrived by sea and half came overland on the California Trail and the Gila River trail. While most of the newly arrived were Americans, the gold rush attracted thousands from Latin America, Europe and China. Agriculture and ranching expanded throughout the state to meet the needs of the settlers. San Francisco grew from a small settlement of about 200 residents in 1846 to a boomtown of about 36,000 by 1852. Roads, churches and other towns were built throughout California. In 1849 a state constitution was written; the new constitution was adopted by referendum vote, the future state's interim first governor and legislature were chosen. In September 1850, California became a state. At the beginning of the Gold Rush, there was no law regarding property rights in the goldfields and a system of "staking claims" was developed. Prospectors retrieved the gold from riverbeds using simple techniques, such as panning. Although the mining caused environmental harm, more sophisticated methods of gold recovery were developed and adopted around the world.
New methods of transportation developed. By 1869, railroads were built from California to the eastern United States. At its peak, technological advances reached a point where significant financing was required, increasing the proportion of gold companies to individual miners. Gold worth tens of billions of today's US dollars was recovered, which led to great wealth for a few, though many who participated in the California Gold Rush earned little more than they had started with; the Mexican–American War ended on February 3, 1848, although California was a de facto American possession before that. The Treaty of Guadalupe Hidalgo provided for, among other things, the formal transfer of Upper California to the United States; the California Gold Rush began near Coloma. On January 24, 1848, James W. Marshall, a foreman working for Sacramento pioneer John Sutter, found shiny metal in the tailrace of a lumber mill Marshall was building for Sutter on the American River. Marshall brought what he found to John Sutter, the two tested the metal.
After the tests showed that it was gold, Sutter expressed dismay: he wanted to keep the news quiet because he feared what would happen to his plans for an agricultural empire if there were a mass search for gold. Rumors of the discovery of gold were confirmed in March 1848 by San Francisco newspaper publisher and merchant Samuel Brannan. Brannan hurriedly set up a store to sell gold prospecting supplies, walked through the streets of San Francisco, holding aloft a vial of gold, shouting "Gold! Gold! Gold from the American River!"On August 19, 1848, the New York Herald was the first major newspaper on the East Coast to report the discovery of gold. On December 5, 1848, US President James Polk confirmed the discovery of gold in an address to Congress; as a result, individuals seeking to benefit from the gold rush--later called the "forty-niners"--began moving to the Gold Country of California or "Mother Lode" from other countries and from other parts of the United States. As Sutter had feared, his business plans were ruined after his workers left in search of gold, squatters took over his land and stole his crops and cattle.
San Francisco had been a tiny settlement. When residents learned about the discovery, it at first became a ghost town of abandoned ships and businesses, but boomed as merchants and new people arrived; the population of San Francisco increased from about 1,000 in 1848 to 25,000 full-time residents by 1850. Miners lived in wood shanties, or deck cabins removed from abandoned ships. In what has been referred to as the "first world-class gold rush," there was no easy way to get to California. At first, most Argonauts, as they were known, traveled by sea. From the East Coast, a sailing voyage around the tip of South America would take four to five months, cover 18,000 nautical miles. An alternative was to sail to the Atlantic side of the Isthmus of Panama, take canoes and mules for a week through the jungle, on the Pacific side, wait for a ship sailing for San Francisco. There was a route across Mexico starting at Veracruz; the companies providing such transportation created vast wealth among their owners and included the U.
S. Mail Steamship Company, the federally subsidized Pacific Mail Steamship Company, the Accessory Tra
Isabella I of Castile
Isabella I reigned as Queen of Castile from 1474 until her death. Her marriage to Ferdinand II of Aragon became the basis for the political unification of Spain under their grandson, Charles V. After a struggle to claim her right to the throne, she reorganized the governmental system, brought the crime rate to the lowest it had been in years, unburdened the kingdom of the enormous debt her brother had left behind, her reforms and those she made with her husband had an influence that extended well beyond the borders of their united kingdoms. Isabella and Ferdinand are known for completing the Reconquista, ordering conversion or exile of their Muslim and Jewish subjects, for supporting and financing Christopher Columbus's 1492 voyage that led to the opening of the New World and to the establishment of Spain as the first global power which dominated Europe and much of the world for more than a century. Isabella, granted together with her husband the title "the Catholic" by Pope Alexander VI, was recognized as a Servant of God by the Catholic Church in 1974.
Isabella was born in Madrigal de las Altas Torres, Ávila, to John II of Castile and his second wife, Isabella of Portugal on 22 April 1451. At the time of her birth, she was second in line to the throne after her older half-brother Henry IV of Castile. Henry childless, her younger brother Alfonso of Castile was born two years on 17 November 1453, lowering her position to third in line. When her father died in 1454, her half-brother ascended to the throne as King Henry IV of Castile. Isabella and her brother Alfonso were left in King Henry's care. She, her mother, Alfonso moved to Arévalo; these were times of turmoil for Isabella. The living conditions at their castle in Arévalo were poor, they suffered from a shortage of money. Although her father arranged in his will for his children to be financially well taken care of, King Henry did not comply with their father's wishes, either from a desire to keep his half-siblings restricted, or from ineptitude. Though living conditions were difficult, under the careful eye of her mother, Isabella was instructed in lessons of practical piety and in a deep reverence for religion.
When the King's wife, Joan of Portugal, was about to give birth to their daughter Joanna and her brother Alfonso were summoned to court in Segovia to come under the direct supervision of the King and to finish their education. Alfonso was placed in the care of a tutor; some of Isabella's living conditions improved in Segovia. She always had food and clothing and lived in a castle, adorned with gold and silver. Isabella's basic education consisted of reading, writing, mathematics, chess, embroidery and religious instruction, she and her ladies-in-waiting entertained themselves with art and music. She lived a relaxed lifestyle, but she left Segovia since King Henry forbade this, her half-brother was keeping her from the political turmoils going on in the kingdom, though Isabella had full knowledge of what was going on and of her role in the feuds. The noblemen, anxious for power, confronted King Henry, demanding that his younger half-brother Infante Alfonso be named his successor, they went so far as to ask Alfonso to seize the throne.
The nobles, now in control of Alfonso and claiming that he was the true heir, clashed with King Henry's forces at the Second Battle of Olmedo in 1467. The battle was a draw. King Henry agreed to recognize Alfonso as his heir presumptive, provided that he would marry his daughter, Princess Joanna la Beltraneja. Soon after he was named Prince of Asturias, Isabella's younger brother Alfonso died in July 1468 of the plague; the nobles who had supported him suspected poisoning. As she had been named in her brother's will as his successor, the nobles asked Isabella to take his place as champion of the rebellion. However, support for the rebels had begun to wane, Isabella preferred a negotiated settlement to continuing the war, she met with her elder brother Henry at Toros de Guisando and they reached a compromise: the war would stop, King Henry would name Isabella his heir-presumptive instead of his daughter Joanna, Isabella would not marry without her brother's consent, but he would not be able to force her to marry against her will.
Isabella's side came out with most of what the nobles desired, though they did not go so far as to depose King Henry. The question of Isabella's marriage was not a new one, she had made her debut in the matrimonial market at the age of six with a betrothal to Ferdinand, the younger son of John II of Navarre. At that time, the two kings and John, were eager to show their mutual love and confidence and they believed that this double alliance would make their eternal friendship obvious to the world; this arrangement, did not last long. Ferdinand's uncle Alfonso V of Aragon died in 1458. All of Alfonso's Spanish territories, as well as the islands of Sicily and Sardinia, were left to his brother John II. John now had a stronger position than before and no longer needed the security of Henry's friendship. Henry was now in need of a new alliance, he saw the chance for this much needed new friendship in Charles of John's elder son. Charles was at odds with his father, because of this, he secretly entered into an alliance with Henry IV of Castile.
A major part of the alliance was
Christopher Columbus was an Italian explorer and colonist who completed four voyages across the Atlantic Ocean under the auspices of the Catholic Monarchs of Spain. He led the first European expeditions to the Caribbean, Central America, South America, initiating the permanent European colonization of the Americas. Columbus discovered the viable sailing route to the Americas, a continent, not known to the Old World. While what he thought he had discovered was a route to the Far East, he is credited with the opening of the Americas for conquest and settlement by Europeans. Columbus's early life is somewhat obscure, but scholars agree that he was born in the Republic of Genoa and spoke a dialect of Ligurian as his first language, he went to sea at a young age and travelled as far north as the British Isles and as far south as what is now Ghana. He married Portuguese noblewoman Filipa Moniz Perestrelo and was based in Lisbon for several years, but took a Spanish mistress. Though self-educated, Columbus was read in geography and history.
He formulated a plan to seek a western sea passage to the East Indies, hoping to profit from the lucrative spice trade. After years of lobbying, the Catholic Monarchs of Spain agreed to sponsor a journey west, in the name of the Crown of Castile. Columbus left Spain in August 1492 with three ships, after a stopover in the Canary Islands made landfall in the Americas on 12 October, his landing place was an island in the Bahamas, known by its native inhabitants as Guanahani. Columbus subsequently visited Cuba and Hispaniola, establishing a colony in what is now Haiti—the first European settlement in the Americas since the Norse colonies 500 years earlier, he arrived back in Spain in early 1493. Word of his discoveries soon spread throughout Europe. Columbus would make three further voyages to the New World, exploring the Lesser Antilles in 1493, Trinidad and the northern coast of South America in 1498, the eastern coast of Central America in 1502. Many of the names he gave to geographical features—particularly islands—are still in use.
He continued to seek a passage to the East Indies, the extent to which he was aware that the Americas were a wholly separate landmass is uncertain. Columbus's strained relationship with the Spanish crown and its appointed colonial administrators in America led to his arrest and removal from Hispaniola in 1500, to protracted litigation over the benefits that he and his heirs claimed were owed to them by the crown. Columbus's expeditions inaugurated a period of exploration and colonization that lasted for centuries, helping create the modern Western world; the transfers between the Old World and New World that followed his first voyage are known as the Columbian exchange, the period of human habitation in the Americas prior to his arrival is known as the Pre-Columbian era. Columbus's legacy continues to be debated, he was venerated in the centuries after his death, but public perceptions have changed as recent scholars have given attention to negative aspects of his life, such as his role in the extinction of the Taíno people, his promotion of slavery, allegations of tyranny towards Spanish colonists.
Many landmarks and institutions in the Western Hemisphere bear his name, including the country of Colombia. The name Christopher Columbus is the Anglicisation of the Latin Christophorus Columbus, his name in Ligurian is Cristoffa Corombo, in Italian Cristoforo Colombo, in Spanish is Cristóbal Colón, in Portuguese is Cristóvão Colombo. He was born before 31 October 1451 in the territory of the Republic of Genoa, though the exact location remains disputed, his father was Domenico Colombo, a middle-class wool weaver who worked both in Genoa and Savona and who owned a cheese stand at which young Christopher worked as a helper. His mother was Susanna Fontanarossa. Bartolomeo, Giovanni Pellegrino, Giacomo were his brothers. Bartolomeo worked in a cartography workshop in Lisbon for at least part of his adulthood, he had a sister named Bianchinetta. Columbus never wrote in his native language, presumed to have been a Genoese variety of Ligurian: his name in the 16th-century Genoese language would have been Cristoffa Corombo.
In one of his writings, he says he went to sea at the age of 10. In 1470, the Columbus family moved to Savona. In the same year, Christopher was on a Genoese ship hired in the service of René of Anjou to support his attempt to conquer the Kingdom of Naples; some modern historians have argued that he was not from Genoa but, from the Aragon region of Spain or from Portugal. These competing hypotheses have been discounted by mainstream scholars. In 1473, Columbus began his apprenticeship as business agent for the important Centurione, Di Negro and Spinola families of Genoa, he made a trip to Chios, an Aegean island ruled by Genoa. In May 1476, he took part in an armed convoy sent by Genoa to carry valuable cargo to northern Europe, he docked in Bristol and Galway, Ireland. In 1477, he was in Iceland. In the autumn of 1477, he sailed on a Portuguese ship from Galway to Lisbon, where he found his brother Bartolomeo, they continued trading for the Centurione family. Columbus based himself in Lisbon from 1477 to 1485.
He married Filipa Moniz Perestrelo, daughter of the Porto Santo governor and Portuguese nobleman of
Copper is a chemical element with symbol Cu and atomic number 29. It is a soft and ductile metal with high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals; this led to early human use in several regions, from c. 8000 BC. Thousands of years it was the first metal to be smelted from sulfide ores, c. 5000 BC, the first metal to be cast into a shape in a mold, c. 4000 BC and the first metal to be purposefully alloyed with another metal, tin, to create bronze, c. 3500 BC. In the Roman era, copper was principally mined on Cyprus, the origin of the name of the metal, from aes сyprium corrupted to сuprum, from which the words derived and copper, first used around 1530.
The encountered compounds are copper salts, which impart blue or green colors to such minerals as azurite and turquoise, have been used and as pigments. Copper used in buildings for roofing, oxidizes to form a green verdigris. Copper is sometimes used in decorative art, both in its elemental metal form and in compounds as pigments. Copper compounds are used as bacteriostatic agents and wood preservatives. Copper is essential to all living organisms as a trace dietary mineral because it is a key constituent of the respiratory enzyme complex cytochrome c oxidase. In molluscs and crustaceans, copper is a constituent of the blood pigment hemocyanin, replaced by the iron-complexed hemoglobin in fish and other vertebrates. In humans, copper is found in the liver and bone; the adult body contains between 2.1 mg of copper per kilogram of body weight. Copper and gold are in group 11 of the periodic table; the filled d-shells in these elements contribute little to interatomic interactions, which are dominated by the s-electrons through metallic bonds.
Unlike metals with incomplete d-shells, metallic bonds in copper are lacking a covalent character and are weak. This observation explains the low high ductility of single crystals of copper. At the macroscopic scale, introduction of extended defects to the crystal lattice, such as grain boundaries, hinders flow of the material under applied stress, thereby increasing its hardness. For this reason, copper is supplied in a fine-grained polycrystalline form, which has greater strength than monocrystalline forms; the softness of copper explains its high electrical conductivity and high thermal conductivity, second highest among pure metals at room temperature. This is because the resistivity to electron transport in metals at room temperature originates from scattering of electrons on thermal vibrations of the lattice, which are weak in a soft metal; the maximum permissible current density of copper in open air is 3.1×106 A/m2 of cross-sectional area, above which it begins to heat excessively. Copper is one of a few metallic elements with a natural color other than silver.
Pure copper acquires a reddish tarnish when exposed to air. The characteristic color of copper results from the electronic transitions between the filled 3d and half-empty 4s atomic shells – the energy difference between these shells corresponds to orange light; as with other metals, if copper is put in contact with another metal, galvanic corrosion will occur. Copper does not react with water, but it does react with atmospheric oxygen to form a layer of brown-black copper oxide which, unlike the rust that forms on iron in moist air, protects the underlying metal from further corrosion. A green layer of verdigris can be seen on old copper structures, such as the roofing of many older buildings and the Statue of Liberty. Copper tarnishes when exposed to some sulfur compounds, with which it reacts to form various copper sulfides. There are 29 isotopes of copper. 63Cu and 65Cu are stable, with 63Cu comprising 69% of occurring copper. The other isotopes are radioactive, with the most stable being 67Cu with a half-life of 61.83 hours.
Seven metastable isotopes have been characterized. Isotopes with a mass number above 64 decay by β−, whereas those with a mass number below 64 decay by β+. 64Cu, which has a half-life of 12.7 hours, decays both ways.62Cu and 64Cu have significant applications. 62Cu is used in 62Cu-PTSM as a radioactive tracer for positron emission tomography. Copper is produced in massive stars and is present in the Earth's crust in a proportion of about 50 parts per million. In nature, copper occurs in a variety of minerals, including native copper, copper sulfides such as chalcopyrite, digenite and chalcocite, copper sulfosalts such as tetrahedite-tennantite, enargite, copper carbonates such as azurite and malachite, as copper or copper oxides such as cuprite and tenorite, respectively; the largest mass of elemental copper discovered weighed 420 tonnes and was found in 1857 on the Keweenaw Peninsula in Michigan, US. Native copper is a polycrystal