Sunday, February 5, 2012

THOMAS ALFA EDISON





Nearly all of Edison's patents were utility patents, which were protected for a 17-year period and included inventions or processes that are electrical, mechanical, or chemical in nature. About a dozen were design patents, which protect an ornamental design for up to a 14-year period. As in most patents, the inventions he described were improvements over prior art. The phonograph patent, in contrast, was unprecedented as describing the first device to record and reproduce sounds. Edison did not invent the first electric light bulb, but instead invented the first commercially practical incandescent light. Many earlier inventors had previously devised incandescent lamps, including Henry Woodward and Mathew Evans. Others who developed early and commercially impractical incandescent electric lamps included Humphry Davy, James Bowman Lindsay, Moses G. Farmer, William E. Sawyer, Joseph Swan and Heinrich Göbel. Some of these early bulbs had such flaws as an extremely short life, high expense to produce, and high electric current drawn, making them difficult to apply on a large scale commercially. In 1878, Edison applied the term filament to the element of glowing wire carrying the current, although the English inventor Joseph Swan had used the term prior to this. Swan developed an incandescent light with a long lasting filament at about the same time as Edison, as Swan's earlier bulbs lacked the high resistance needed to be an effective part of an electrical utility. Edison and his co-workers set about the task of creating longer-lasting bulbs. In Britain, Joseph Swan had been able to obtain a patent on the incandescent lamp; though Edison had already been making successful lamps for some time, his patent application was incompletely prepared and failed. Unable to raise the required capital in Britain because of this, Edison was forced to enter into a joint venture with Swan (known as Ediswan). Swan acknowledged that Edison had anticipated him, saying "Edison is entitled to more than I ... he has seen further into this subject, vastly than I, and foreseen and provided for details that I did not comprehend until I saw his system".By 1879, Edison had produced a new concept: a high resistance lamp in a very high vacuum, which would burn for hundreds of hours. While the earlier inventors had produced electric lighting in laboratory conditions, dating back to a demonstration of a glowing wire by Alessandro Volta in 1800, Edison concentrated on commercial application, and was able to sell the concept to homes and businesses by mass-producing relatively long-lasting light bulbs and creating a complete system for the generation and distribution of electricity.
On February 11, 2011, on Thomas Edison's 164th birthday, Google's homepage featured an animated Google Doodle commemorating his many inventions. When the cursor was hovered over the doodle, a series of mechanisms seemed to move, causing a lightbulb to glow.

CHRISTOPHER COLUMBUS

Christopher Columbus ( 31 October 1451 – 20 May 1506) was an explorer, colonizer, and navigator, born in the Republic of Genoa, in northwestern Italy. Under the auspices of the Catholic Monarchs of Spain, he completed four voyages across the Atlantic Ocean that led to general European awareness of the American continents in the Western Hemisphere. Those voyages, and his efforts to establish permanent settlements in the island of Hispaniola, initiated the process of Spanish colonization, which foreshadowed the general European colonization of the "New World".
In the context of emerging western imperialism and economic competition between European kingdoms seeking wealth through the establishment of trade routes and colonies, Columbus' far-fetched proposal to reach the East Indies by sailing westward received the support of the Spanish crown, which saw in it a promise, however remote, of gaining the upper hand over rival powers in the contest for the lucrative spice trade with Asia. During his first voyage in 1492, instead of reaching Japan as he had intended, Columbus landed in the Bahamas archipelago, at a locale he named San Salvador. Over the course of three more voyages, Columbus visited the Greater and Lesser Antilles, as well as the Caribbean coast of Venezuela and Central America, claiming them for the Spanish Empire.
Though Columbus was not the first European explorer to reach the Americas (having been preceded by the Norse expedition led by Leif Ericson), Columbus' voyages led to the first lasting European contact with America, inaugurating a period of European exploration and colonization of foreign lands that lasted for several centuries. They had, therefore, an enormous impact in the historical development of the modern Western world. Columbus himself saw his accomplishments primarily in the light of the spreading of the Christian religion.
Never admitting that he had reached a continent previously unknown to Europeans, rather than the East Indies he had set out for, Columbus called the inhabitants of the lands he visited indios (Spanish for "Indians").Columbus' strained relationship with the Spanish crown and its appointed colonial administrators in America led to his arrest and dismissal as governor of the settlements in Hispaniola in 1500, and later to protracted litigation over the benefits which Columbus and his heirs claimed were owed to them by the crown.

Early life
Christopher Columbus at the gates of the monastery of Santa Maria de la Rabida with his son Diego. Painting by Benito Mercade y Fabregas
The name Christopher Columbus is the Anglicisation of the Latin Christophorus Columbus. His name in Italian is Cristoforo Colombo and in Spanish it is Cristóbal Colón. Columbus was born between 25 August and 31 October 1451 in Genoa, part of modern Italy. His father was Domenico Colombo, a middle-class wool weaver who worked both in Genoa and Savona and who also owned a cheese stand at which young Christopher worked as a helper. Christopher's mother was Susanna Fontanarossa. Bartolomeo, Giovanni Pellegrino and Giacomo were his brothers. Bartolomeo worked in a cartography workshop in Lisbon for at least part of his adulthood.
Columbus never wrote in his native language, which is presumed to have been a Genoese variety of Ligurian (his very name would translate in XVI century Genoese language as Christoffa Corombo pron. IPA: kriˈʃtɔffa kuˈɹuŋbu). In one of his writings, Columbus claims to have gone to the sea at the age of 10. In 1470 the Columbus family moved to Savona, where Domenico took over a tavern. In the same year, Columbus was on a Genoese ship hired in the service of René I of Anjou to support his attempt to conquer the Kingdom of Naples. Some modern historians have argued that Columbus was not from Genoa, but instead, from Catalonia, Portugal, or Spain. These competing hypotheses have generally been discounted by mainstream scholars.

Columbus' notes in Latin, on the margins of his copy of The Travels of Marco Polo
In 1473 Columbus began his apprenticeship as business agent for the important Centurione, Di Negro and Spinola families of Genoa. Later he allegedly made a trip to Chios, a Genoese colony in the Aegean Sea. In May 1476, he took part in an armed convoy sent by Genoa to carry a valuable cargo to northern Europe. He docked in Bristol, England; Galway, Ireland and was possibly in Iceland in 1477. In 1479 Columbus reached his brother Bartolomeo in Lisbon, while continuing trading for the Centurione family. He married Filipa Moniz Perestrelo, daughter of the Porto Santo governor and Portuguese nobleman of Genoese origin Bartolomeu Perestrello. In 1479 or 1480, his son Diego Columbus was born. Between 1482 and 1485 Columbus traded along the coasts of West Africa, reaching the Portuguese trading post of Elmina at the Guinea coast. Some records report that Filipa died in 1485. It is also speculated that Columbus may have simply left his first wife. In either case Columbus found a mistress in Spain in 1487, a 20-year-old orphan named Beatriz Enríquez de Arana.
Ambitious, Columbus eventually learned Latin, as well as Portuguese and Castilian, and read widely about astronomy, geography, and history, including the works of Ptolemy, Cardinal Pierre d'Ailly's Imago Mundi, the travels of Marco Polo and Sir John Mandeville, Pliny's Natural History, and Pope Pius II's Historia Rerum Ubique Gestarum. According to historian Edmund Morgan,
Columbus was not a scholarly man. Yet he studied these books, made hundreds of marginal notations in them and came out with ideas about the world that were characteristically simple and strong and sometimes wrong, the kind of ideas that the self-educated person gains from independent reading and clings to in defiance of what anyone else tries to tell him.
Throughout his life, Columbus also showed a keen interest in the Bible and in biblical prophecies, and would often quote biblical texts in his letters and logs. For example, part of the argument that he submitted to the Spanish Catholic Monarchs when he sought their support for his proposed expedition to reach the Indies by sailing west was based on his reading of the Second Book of Esdras (see 2 Esdras 6:42, which Columbus took to mean that the Earth is made of six parts of land to one of water). Towards the end of life, Columbus produced a Book of Prophecies in which his career as an explorer is interpreted in the light of Christian eschatology and of apocalypticism.
Quest for Asia

"Columbus map", drawn ca. 1490 in the Lisbon workshop of Bartolomeo and Christopher Columbus
Background
Under the Mongol Empire's hegemony over Asia (the so-called Pax Mongolica, or Mongol peace), Europeans had long enjoyed a safe land passage, the so-called "Silk Road", to China and India, which were sources of valuable goods such as silk, spices, and opiates. With the fall of Constantinople to the Ottoman Turks in 1453, the land route to Asia became much more difficult and dangerous. Portuguese navigators, under the leadership of King John II, sought to reach Asia by sailing around Africa. Major progress in this quest was achieved in 1488, when Bartolomeu Dias reached the Cape of Good Hope, in what is now South Africa. Meanwhile, in the 1480s the Columbus brothers had developed a different plan to reach the Indies (then construed roughly as all of south and east Asia) by sailing west across the "Ocean Sea", i.e., the Atlantic.
Geographical considerations
Washington Irving's 1828 biography of Columbus popularized the idea that Columbus had difficulty obtaining support for his plan because many Catholic theologians insisted that the Earth was flat. In fact, most educated Westerners had understood that the Earth was spherical at least since the time of Aristotle, who lived in the 4th century BC and whose works were widely studied and revered in Medieval Europe. The sphericity of the Earth is also accounted for in the work of Ptolemy, on which ancient astronomy was largely based. Christian writers whose works clearly reflect the conviction that the Earth is spherical include Saint Bede the Venerable in his Reckoning of Time, written around AD 723. In Columbus' time, the techniques of celestial navigation, which use the position of the Sun and the Stars in the sky, together with the understanding that the Earth is a sphere, were widely used by mariners.
Where Columbus did differ from the view accepted by scholars in his day was in his estimate of the westward distance from Europe to Asia. Columbus' ideas in this regard were based on three factors: his low estimate of the size of the Earth, his high estimate of the size of the Eurasian landmass, and his belief that Japan and other inhabited islands lay far to the east of the coast of China. In all three of these issues Columbus was both wrong and at odds with the scholarly consensus of his day.
As far back as the 3rd century BC, Eratosthenes had correctly computed the circumference of the Earth by using simple geometry and studying the shadows cast by objects at two different locations: Alexandria and Syene (modern-day Aswan). Eratosthenes's results were confirmed by a comparison of stellar observations at Alexandria and Rhodes, carried out by Posidonius in the 1st century BC. These measurements were widely known among scholars, but confusion about the old-fashioned units of distance in which they were expressed had led, in Columbus's day, to some debate about the exact size of the Earth.

Toscanelli's notions of the geography of the Atlantic Ocean, which directly influenced Columbus' plans
From d'Ailly's Imago Mundi Columbus learned of Alfraganus's estimate that a degree of latitude (or a degree of longitude along the Equator) spanned 56⅔ miles, but did not realize that this was expressed in the Arabic mile (about 1,830 m) rather than the shorter Roman mile with which he was familiar (1,480 m). He therefore estimated the circumference of the Earth to be about 30,200 km, whereas the correct value is 40,000 km (25,000 mi).
Furthermore, most scholars accepted Ptolemy's estimate that Eurasia spanned 180° longitude, rather than the actual 130° (to the Chinese mainland) or 150° (to Japan at the latitude of Spain). Columbus, for his part, believed the even higher estimate of Marinus of Tyre, which put the longitudinal span of the Eurasian landmass at 225°, leaving only 135° of water. He also believed that Japan (which he called "Cipangu", following Marco Polo) was much larger, further to the east from China ("Cathay"), and closer to the Equator than it is, and that there were inhabited islands even further to the east than Japan, including the mythical Antillia, which he thought might lie not much further to the west than the Azores. In this he was influenced by the ideas of Florentine physician Paolo dal Pozzo Toscanelli, who corresponded with Columbus before his death in 1482 and who also defended the feasibility of a westward route to Asia.
Columbus therefore estimated the distance from the Canary Islands to Japan to be about 3,000 Italian miles (3,700 km, or 2,300 statute miles), while the correct figure is 19,600 km (12,200 mi), or about 12,000 km along a great circle. No ship in the 15th century could carry enough food and fresh water for such a long voyage and the dangers involved in navigating through the uncharted ocean would have been formidable. Most European navigators reasonably concluded that a westward voyage from Europe to Asia was unfeasible. The Catholic Monarchs, however, having completed an expensive war in the Iberian Peninsula, were desperate for a competitive edge over other European countries in the quest for trade with the Indies. Columbus promised such an advantage.
Nautical considerations
Though Columbus was wrong about the number of degrees of longitude that separated Europe from the Far East and about the distance that each degree represented, he did possess valuable knowledge about the trade winds, which would prove to be the key to his successful navigation of the Atlantic Ocean. During his first voyage in 1492, the brisk trade winds from the east, commonly called "easterlies", propelled Columbus' fleet for five weeks, from the Canary Islands to The Bahamas. To return to Spain against this prevailing wind would have required several months of an arduous sailing technique, called beating, during which food and drinkable water would probably have been exhausted.
Instead, Columbus returned home by following the curving trade winds northeastward to the middle latitudes of the North Atlantic, where he was able to catch the "westerlies" that blow eastward to the coast of Western Europe. There, in turn, the winds curve southward towards the Iberian Peninsula.
It is unclear whether Columbus learned about the winds from his own sailing experience or if he had heard about them from others. The corresponding technique for efficient travel in the Atlantic appears to have been discovered first by the Portuguese, who referred to it as the Volta do mar ("turn of the sea"). Columbus' knowledge of the Atlantic wind patterns was, however, imperfect at the time of his first voyage. By sailing directly due west from the Canary Islands during hurricane season, skirting the so-called horse latitudes of the mid-Atlantic, Columbus risked either being becalmed or running into a tropical cyclone, both of which he luckily avoided.
Quest for support
In 1485, Columbus presented his plans to John II, King of Portugal. He proposed that the king equip three sturdy ships and grant Columbus one year's time to sail out into the Atlantic, search for a western route to the Orient, and return.

Columbus and Queen Isabella. Detail of the Columbus monument in Madrid (1885).
Columbus also requested he be made "Great Admiral of the Ocean", appointed governor of any and all lands he discovered, and given one-tenth of all revenue from those lands.
The king submitted Columbus' proposal to his experts, who rejected it. It was their considered opinion that Columbus' estimation of a travel distance of 2,400 miles (3,860 km) was, in fact, far too low.
In 1488 Columbus appealed to the court of Portugal once again, and once again John II invited him to an audience. That meeting also proved unsuccessful, in part because not long afterwards Bartolomeu Dias returned to Portugal with news of his successful rounding of the southern tip of Africa (near the Cape of Good Hope). With an eastern sea route to Asia apparently at hand, King John was no longer interested in Columbus's far-fetched project.
Columbus traveled from Portugal to both Genoa and Venice, but he received encouragement from neither. Columbus had also dispatched his brother Bartholomew to the court of Henry VII of England, to inquire whether the English crown might sponsor his expedition, but also without success.
Columbus had sought an audience from the monarchs Ferdinand II of Aragon and Isabella I of Castile, who had united many kingdoms in the Iberian Peninsula by marrying, and were ruling together. On 1 May 1486, permission having been granted, Columbus presented his plans to Queen Isabella, who, in turn, referred it to a committee. After the passing of much time, the savants of Spain, like their counterparts in Portugal, replied that Columbus had grossly underestimated the distance to Asia. They pronounced the idea impractical and advised their Royal Highnesses to pass on the proposed venture.
However, to keep Columbus from taking his ideas elsewhere, and perhaps to keep their options open, the Catholic Monarchs gave him an annual allowance of 12,000 maravedis and in 1489 furnished him with a letter ordering all cities and towns under their domain to provide him food and lodging at no cost.


~ Flagship of Columbus ~ Fleet of Columbus ~
~ 400th Anniversary Issues of 1893 ~


U.S. stamps reflecting the most commonly held view as to what Columbus' first fleet might have looked like. The Santa Maria, the flagship of Columbus' fleet, was a carrack—a merchant ship of between 400 and 600 tons, 75 feet (23 m) long, with a beam of 25 feet (7.6 m), allowing it to carry more people and cargo. It had a deep draft of 6 feet (1.8 m). The vessel had three masts: a mainmast, a foremast, and a mizzenmast. Five sails altogether were attached to these masts. Each mast carried one large sail. The foresail and mainsail were square; the sail on the mizzen was a triangular sail known as a lateen mizzen. The ship had a smaller topsail on the mainmast above the mainsail and on the foremast above the foresail. In addition, the ship carried a small square sail, a spritsail, on the bowsprit.
Agreement with the Spanish crown
After continually lobbying at the Spanish court and two years of negotiations, he finally had success in 1492. Ferdinand and Isabella had just conquered Granada, the last Muslim stronghold on the Iberian Peninsula, and they received Columbus in Córdoba, in the Alcázar castle. Isabella turned Columbus down on the advice of her confessor, and he was leaving town by mule in despair, when Ferdinand intervened. Isabella then sent a royal guard to fetch him and Ferdinand later claimed credit for being "the principal cause why those islands were discovered".
About half of the financing was to come from private Italian investors, whom Columbus had already lined up. Financially broke after the Granada campaign, the monarchs left it to the royal treasurer to shift funds among various royal accounts on behalf of the enterprise. Columbus was to be made "Admiral of the Seas" and would receive a portion of all profits. The terms were unusually generous, but as his son Diego later wrote, the monarchs did not really expect him to return.
In the "Capitulations of Santa Fe", King Ferdinand and Queen Isabella promised Columbus that if he succeeded he would be given the rank of Admiral of the Ocean Sea and appointed Viceroy and Governor of all the new lands he could claim for Spain. He had the right to nominate three persons, from whom the sovereigns would choose one, for any office in the new lands. He would be entitled to 10% of all the revenues from the new lands in perpetuity. Additionally, he would also have the option of buying one-eighth interest in any commercial venture with the new lands and receive one-eighth of the profits.

Columbus' coat of arms, as depicted in his Book of Privileges (1502)
Columbus was later arrested in 1500 and dismissed from his posts. He and his sons, Diego and Fernando, then conduced a lengthy series of court cases against the Castilian crown, known as the pleitos colombinos, alleging that the Crown had illegally reneged on its contractual obligations to Columbus and his heirs. The Columbus family had some success in their first litigation, as a judgment of 1511 confirmed Diego's position as Viceroy, but reduced his powers. Diego resumed litigation in 1512, which lasted until 1536, and further disputes continued until 1790.
Voyages

Voyages of Christopher Columbus
Between 1492 and 1503, Columbus completed four round-trip voyages between Spain and the Americas, all of them under the sponsorship of the Crown of Castile. These voyages marked the beginning of the European exploration and colonization of the American continents, and are thus of enormous significance in Western history. Columbus himself always insisted, in the face of mounting evidence to the contrary, that the lands that he visited during those voyages were part of the Asian continent, as previously described by Marco Polo and other European travelers.11 Columbus' refusal to accept that the lands he had visited and claimed for Spain were not part of Asia might explain, in part, why the American continent was named after the Florentine explorer Amerigo Vespucci and not after Columbus.
First voyage

Christopher Columbus on Santa Maria in 1492.
On the evening of 3 August 1492, Columbus departed from Palos de la Frontera with three ships; one larger carrack, Santa María, nicknamed Gallega (the Galician), and two smaller caravels, Pinta (the Painted) and Santa Clara, nicknamed Niña after her owner Juan Niño of Moguer. They were property of Juan de la Cosa and the Pinzón brothers (Martín Alonso and Vicente Yáñez), but the monarchs forced the Palos inhabitants to contribute to the expedition. Columbus first sailed to the Canary Islands, which were owned by Castile, where he restocked the provisions and made repairs. After stopping over in Gran Canaria, he finally departed from San Sebastián de La Gomera on 6 September, for what turned out to be a five-week voyage across the ocean.
A lookout on the Pinta, Rodrigo de Triana (also known as Juan Rodriguez Bermeo), spotted land about 2 am on the morning of 12 October, and immediately alerted the rest of the crew with a shout. Thereupon, the captain of the Pinta, Juan Alonso Pinzón, verified the discovery and alerted Columbus by firing a lombard. Columbus later maintained that he himself had already seen a light on the land a few hours earlier, thereby claiming for himself the lifetime pension promised by Ferdinand and Isabella to the first person to sight land.

First voyage. Modern placenames in black, Columbus's placenames in blue.
Columbus called the island (in what is now The Bahamas) San Salvador; the natives called it Guanahani. Exactly which island in the Bahamas this corresponds to is an unresolved topic; prime candidates are Samana Cay, Plana Cays, or San Salvador Island (so named in 1925 in the belief that it was Columbus's San Salvador). The indigenous people he encountered, the Lucayan, Taíno or Arawak, were peaceful and friendly. From the 12 October 1492 entry in his journal he wrote of them, "Many of the men I have seen have scars on their bodies, and when I made signs to them to find out how this happened, they indicated that people from other nearby islands come to San Salvador to capture them; they defend themselves the best they can. I believe that people from the mainland come here to take them as slaves. They ought to make good and skilled servants, for they repeat very quickly whatever we say to them. I think they can very easily be made Christians, for they seem to have no religion. If it pleases our Lord, I will take six of them to Your Highnesses when I depart, in order that they may learn our language." He remarked that their lack of modern weaponry and even metal-forged swords or pikes was a tactical vulnerability, writing, "I could conquer the whole of them with 50 men, and govern them as I pleased."
Columbus also explored the northeast coast of Cuba (landed on 28 October) and the northern coast of Hispaniola, by 5 December. Here, the Santa Maria ran aground on Christmas Day 1492 and had to be abandoned. He was received by the native cacique Guacanagari, who gave him permission to leave some of his men behind. Columbus left 39 men and founded the settlement of La Navidad at the site of present-day Môle-Saint-Nicolas, Haiti. On 13 January 1493 Columbus made his last stop in the New World. He landed on the Samaná Peninsula where he met the hostile Ciguayos who presented him with his only violent resistance during his first voyage to the Americas. Because of this, and the Ciguayos' use of arrows, he called the inlet where he met them the Bay of Arrows (or Gulf of Arrows). Today the place is called the Bay of Rincon, in Samaná, the Dominican Republic. Columbus kidnapped about 10 to 25 natives and took them back with him (only seven or eight of the native Indians arrived in Spain alive, but they made quite an impression on Seville).
Columbus headed for Spain, but another storm forced him into Lisbon. He anchored next to the King's harbor patrol ship on 4 March 1493 in Portugal. After spending more than one week in Portugal, he set sail for Spain. He crossed the bar of Saltes and entered the harbor of Palos on 15 March 1493. Word of his finding new lands rapidly spread throughout Europe.
the return of Christopher Columbus; his audience before King Ferdinand and Queen Isabella. Painting by Eugène Delacroix
Second voyage
Columbus left Cadiz on 24 September 1493 to find new territories, with 17 ships carrying supplies, and about 1,200 men to colonize the region. The colonists included priests, farmers, and soldiers. This was part of a new policy – not just "colonies of exploitation", but "colonies of settlement" and conversion of the natives to Christianity. The Washington Post reported that "The studies hint that, among other things, crew members may have included free black Africans who arrived in the New World about a decade before the slave trade began." On 13 October the ships left the Canary Islands as they had on the first voyage, following a more southerly course.
On 3 November 1493, Columbus sighted a rugged island that he named Dominica (Latin for Sunday); later that day, he landed at Marie-Galante, which he named Santa Maria la Galante. After sailing past Les Saintes (Los Santos, The Saints), he arrived at Guadeloupe Santa María de Guadalupe de Extremadura, after the image of the Virgin Mary venerated at the Spanish monastery of Villuercas, in Guadalupe (Spain), which he explored between 4 and 10 November 1493.
Michele da Cuneo, Columbus's childhood friend from Savona, sailed with Columbus during the second voyage and wrote: "In my opinion, since Genoa was Genoa, there was never born a man so well equipped and expert in the art of navigation as the said lord Admiral." Columbus named the small island of "Saona ... to honor Michele da Cuneo, his friend from Savona." The father of Bartolomé de las Casas also accompanied Colombus on this voyage.

Second voyage
The exact course of his voyage through the Lesser Antilles is debated, but it seems likely that he turned north, sighting and naming several islands, including:
  • Montserrat (for Santa Maria de Montserrate, after the Blessed Virgin of the Monastery of Montserrat, which is located on the Mountain of Montserrat, in Catalonia, Spain),
  • Antigua (after a church in Seville, Spain, called Santa Maria la Antigua, meaning "Old St. Mary's"),
  • Redonda (for Santa Maria la Redonda, Spanish for "round", owing to the island's shape),
  • Nevis (derived from the Spanish, Nuestra Señora de las Nieves, meaning "Our Lady of the Snows", because Columbus thought the clouds over Nevis Peak made the island resemble a snow-capped mountain),
  • Saint Kitts (for St. Christopher, patron of sailors and travelers),
  • Sint Eustatius (for the early Roman martyr, St. Eustachius),
  • Saba (also for St. Christopher?),
  • Saint Martin (San Martin), and
  • Saint Croix (from the Spanish Santa Cruz, meaning "Holy Cross"). He also sighted the island chain of the Virgin Islands (and named them Islas de Santa Ursula y las Once Mil Virgenes, Saint Ursula and the 11,000 Virgins, a cumbersome name that was usually shortened, both on maps of the time and in common parlance, to Islas Virgenes), and he also named the islands of Virgin Gorda (the fat virgin), Tortola, and Peter Island (San Pedro).
He continued to the Greater Antilles, and landed at Puerto Rico (originally San Juan Bautista, in honor of Saint John the Baptist, a name that was later supplanted by Puerto Rico (English: Rich Port) while the capital retained the name, San Juan) on 19 November 1493. One of the first skirmishes between native Americans and Europeans since the time of the Vikings took place when Columbus's men rescued two boys who had just been castrated by their captors.
On 22 November Columbus returned to Hispaniola, where he intended to visit Fuerte de la Navidad (Christmas Fort), built during his first voyage, and located on the northern coast of Haiti. Columbus found Fuerte de la Navidad in ruins, destroyed by the native Taino people.
Among the ruins were the corpses of 11 of the first 39 Spanish to have attempted New World colonization. Columbus then required from the Taino that each adult over 14 years of age was expected to deliver a hawks bell full of gold every three months, or when this was lacking, twenty five pounds of spun cotton. If this tribute was not observed, the Taínos had their hands cut off and were left to bleed to death. Columbus then moved more than 100 kilometers eastwards, establishing a new settlement, which he called La Isabela, likewise on the northern coast of Hispaniola, in the present-day Dominican Republic. However, La Isabela proved to be a poorly chosen location, and the settlement was short-lived.
He left Hispaniola on 24 April 1494, arrived at Cuba (naming it Juana) on 30 April. He explored the southern coast of Cuba, which he believed to be a peninsula rather than an island, and several nearby islands, including the Isle of Pines (Isla de las Pinas, later known as La Evangelista, The Evangelist). He reached Jamaica on 5 May. He retraced his route to Hispaniola, arriving on 20 August, before he finally returned to Spain.
Third voyage

Third voyage
On 30 May 1498, Columbus left with six ships from Sanlúcar, Spain, for his third trip to the New World.
Columbus led the fleet to the Portuguese island of Porto Santo, his wife's native land. He then sailed to Madeira and spent some time there with the Portuguese captain João Gonçalves da Camara before sailing to the Canary Islands and Cape Verde. Columbus landed on the south coast of the island of Trinidad on 31 July. From 4 August through 12 August he explored the Gulf of Paria which separates Trinidad from Venezuela. He explored the mainland of South America, including the Orinoco River. He also sailed to the islands of Chacachacare and Margarita Island and sighted and named Tobago (Bella Forma) and Grenada (Concepcion).
Columbus returned to Hispaniola on 19 August to find that many of the Spanish settlers of the new colony were discontented, having been misled by Columbus about the supposedly bountiful riches of the new world. An entry in his journal from September 1498 reads, "From here one might send, in the name of the Holy Trinity, as many slaves as could be sold..." Since Columbus supported the enslavement of the Hispaniola natives for economic reasons, he ultimately refused to baptize them. He had some of his crew hanged for disobeying him. A number of returning settlers and sailors lobbied against Columbus at the Spanish court, accusing him and his brothers of gross mismanagement. On his return he was arrested for a period (see Governorship and arrest section below).
Fourth voyage

Fourth voyage
Before leaving for his fourth voyage, Columbus wrote a letter to the Governors of the Bank of St. George, Genoa, dated at Seville, 2 April 1502. He wrote "Although my body is here my heart is always near you."
Columbus made a fourth voyage nominally in search of the Strait of Malacca to the Indian Ocean. Accompanied by his brother Bartolomeo and his 13-year-old son Fernando, he left Cadiz, (modern Spain), on 11 May 1502, with the ships Capitana, Gallega, Vizcaína and Santiago de Palos. He sailed to Arzila on the Moroccan coast to rescue Portuguese soldiers whom he had heard were under siege by the Moors. On 15 June they landed at Carbet on the island of Martinique (Martinica). A hurricane was brewing, so he continued on, hoping to find shelter on Hispaniola. He arrived at Santo Domingo on 29 June but was denied port, and the new governor refused to listen to his storm prediction. Instead, while Columbus's ships sheltered at the mouth of the Rio Jaina, the first Spanish treasure fleet sailed into the hurricane. Columbus's ships survived with only minor damage, while 29 of the 30 ships in the governor's fleet were lost to the 1 July storm. In addition to the ships, 500 lives (including that of the governor, Francisco de Bobadilla) and an immense cargo of gold were surrendered to the sea.
After a brief stop at Jamaica, Columbus sailed to Central America, arriving at Guanaja (Isla de Pinos) in the Bay Islands off the coast of Honduras on 30 July. Here Bartolomeo found native merchants and a large canoe, which was described as "long as a galley" and was filled with cargo. On 14 August he landed on the continental mainland at Puerto Castilla, near Trujillo, Honduras. He spent two months exploring the coasts of Honduras, Nicaragua, and Costa Rica, before arriving in Almirante Bay, Panama on 16 October.

Columbus intimidates natives by predicting lunar eclipse.
On 5 December 1502, Columbus and his crew found themselves in a storm unlike any they had ever experienced. In his journal Columbus writes,
For nine days I was as one lost, without hope of life. Eyes never beheld the sea so angry, so high, so covered with foam. The wind not only prevented our progress, but offered no opportunity to run behind any headland for shelter; hence we were forced to keep out in this bloody ocean, seething like a pot on a hot fire. Never did the sky look more terrible; for one whole day and night it blazed like a furnace, and the lightning broke with such violence that each time I wondered if it had carried off my spars and sails; the flashes came with such fury and frightfulness that we all thought that the ship would be blasted. All this time the water never ceased to fall from the sky; I do not say it rained, for it was like another deluge. The men were so worn out that they longed for death to end their dreadful suffering.
In Panama, Columbus learned from the natives of gold and a strait to another ocean. After much exploration, in January 1503 he established a garrison at the mouth of the Rio Belen. On 6 April one of the ships became stranded in the river. At the same time, the garrison was attacked, and the other ships were damaged (Shipworms also damaged the ships in tropical waters.). Columbus left for Hispaniola on 16 April heading north. On 10 May he sighted the Cayman Islands, naming them "Las Tortugas" after the numerous sea turtles there. His ships next sustained more damage in a storm off the coast of Cuba. Unable to travel farther, on 25 June 1503 they were beached in St. Ann's Bay, Jamaica.
For a year Columbus and his men remained stranded on Jamaica. A Spaniard, Diego Mendez, and some natives paddled a canoe to get help from Hispaniola. That island's governor, Nicolás de Ovando y Cáceres, detested Columbus and obstructed all efforts to rescue him and his men. In the meantime Columbus, in a desperate effort to induce the natives to continue provisioning him and his hungry men, successfully won the favor of the natives by correctly predicting a lunar eclipse for 29 February 1504, using the Ephemeris of the German astronomer Regiomontanus. Help finally arrived, no thanks to the governor, on 29 June 1504, and Columbus and his men arrived in Sanlúcar, Spain, on 7 November.
Governorship and arrest
Under the terms of the Capitulations of Santa Fe, after his first voyage Columbus was appointed Viceroy and Governor of the Indies, which in practice entailed primarily the administration of the colonies in the island of Hispaniola, whose capital was established in Santo Domingo. By the end of his third voyage, Columbus was physically and mentally exhausted: his body was wracked by arthritis and his eyes by ophthalmia. In October 1499, he sent two ships to Spain, asking the Court of Spain to appoint a royal commissioner to help him govern. By then, accusations of tyranny and incompetence on the part of Columbus had also reached the Court.
The Court appointed Francisco de Bobadilla, a member of the Order of Calatrava, but not as the aide that Columbus had requested. Instead, Bobadilla was given complete control as governor from 1500 until his death in 1502. Arriving in Santo Domingo while Columbus was away, Bobadilla was immediately peppered with complaints about all three Columbus brothers: Christopher, Bartolomé, and Diego. Consuelo Varela, a Spanish historian, states: "Even those who loved him Columbus had to admit the atrocities that had taken place."

Columbus before the Queen, imagined by Emanuel Gottlieb Leutze, 1843
As a result of these testimonies and without being allowed a word in his own defense, Columbus, upon his return, had manacles placed on his arms and chains on his feet and was cast into prison to await return to Spain. He was 48 years old.
On 1 October 1500, Columbus and his two brothers, likewise in chains, were sent back to Spain. Once in Cadiz, a grieving Columbus wrote to a friend at court:
It is now seventeen years since I came to serve these princes with the Enterprise of the Indies. They made me pass eight of them in discussion, and at the end rejected it as a thing of jest. Nevertheless I persisted therein... Over there I have placed under their sovereignty more land than there is in Africa and Europe, and more than 1,700 islands... In seven years I, by the divine will, made that conquest. At a time when I was entitled to expect rewards and retirement, I was incontinently arrested and sent home loaded with chains... The accusation was brought out of malice on the basis of charges made by civilians who had revolted and wished to take possession on the land.... I beg your graces, with the zeal of faithful Christians in whom their Highnesses have confidence, to read all my papers, and to consider how I, who came from so far to serve these princes... now at the end of my days have been despoiled of my honor and my property without cause, wherein is neither justice nor mercy.
According to an uncatalogued document supposedly discovered very late in history purporting to be a record of Columbus's trial which contained the alleged testimony of 23 witnesses, Columbus regularly used barbaric acts of torture to govern Hispaniola.
Columbus and his brothers lingered in jail for six weeks before busy King Ferdinand ordered their release. Not long after, the king and queen summoned the Columbus brothers to the Alhambra palace in Granada. There the royal couple heard the brothers' pleas; restored their freedom and wealth; and, after much persuasion, agreed to fund Columbus's fourth voyage. But the door was firmly shut on Columbus's role as governor. Henceforth Nicolás de Ovando y Cáceres was to be the new governor of the West Indies.
Later life

Santa María, Columbus' flagship in first voyage, at his Valladolid house.


Tomb in Seville Cathedral. The remains are borne by kings of Castile, Leon, Aragon and Navarre.
While Columbus had always given the conversion of non-believers as one reason for his explorations, he grew increasingly religious in his later years. Probably with the assistance of his son Diego and his friend the Carthusian monk Gaspar Gorricio, Columbus produced two books during his later years: a Book of Privileges (1502), detailing and documenting the rewards from the Spanish Crown to which he believed he and his heirs were entitled, and a Book of Prophecies (1505), in which passages from the Bible were used to place his achievements as an explorer in the context of Christian eschatology.11
In his later years, Columbus demanded that the Spanish Crown give him 10% of all profits made in the new lands, as stipulated in the Capitulations of Santa Fe. Because he had been relieved of his duties as governor, the crown did not feel bound by that contract and his demands were rejected. After his death, his heirs sued the Crown for a part of the profits from trade with America, as well as other rewards. This led to a protracted series of legal disputes known as the pleitos colombinos ("Columbian lawsuits").
Death

The death of Columbus. Lithograph by L. Prang & Co., 1893.
On 20 May 1506, at age 54, Columbus died in Valladolid, Spain. According to a study, published in February 2007, by Antonio Rodriguez Cuartero, Department of Internal Medicine of the University of Granada, he died of a heart attack caused by reactive arthritis. According to his personal diaries and notes by contemporaries, the symptoms of this illness (burning pain during urination, pain and swelling of the knees, and conjunctivitis) were clearly evident in his last three years.70
Columbus' remains were first interred at Valladolid, then at the monastery of La Cartuja in Seville (southern Spain) by the will of his son Diego, who had been governor of Hispaniola. In 1542 the remains were transferred to Colonial Santo Domingo, in the present-day Dominican Republic. In 1795, when France took over the entire island of Hispaniola, Columbus' remains were moved to Havana, Cuba. After Cuba became independent following the Spanish-American War in 1898, the remains were moved back to Spain, to the Cathedral of Seville,71 where they were placed on an elaborate catafalque.
However, a lead box bearing an inscription identifying "Don Christopher Columbus" and containing bone fragments and a bullet was discovered at Santo Domingo in 1877.
To lay to rest claims that the wrong relics had been moved to Havana and that Columbus' remains had been left buried in the cathedral at Santo Domingo, DNA samples of the corpse resting in Seville were taken in June 2003 (History Today August 2003) as well as other DNA samples from the remains of his sons Diego and Fernando Colón. Initial observations suggested that the bones did not appear to belong to somebody with the physique or age at death associated with Columbus. DNA extraction proved difficult; only short fragments of mitochondrial DNA could be isolated. The mtDNA fragments matched corresponding DNA from Columbus' brother, giving support that both individuals had shared the same mother. Such evidence, together with anthropologic and historic analyses led the researchers to conclude that the remains found in Seville belonged to Christopher Columbus. The authorities in Santo Domingo have never allowed the remains there to be exhumed, so it is unknown if any of those remains could be from Columbus' body as well. The location of the Dominican remains is in "The Colombus Lighthouse" (Faro a Colón), in Santo Domingo.
Historians have traditionally argued that Columbus remained convinced to the very end that his journeys had been along the east coast of Asia, but scholar Kirkpatrick Sale argues that a document in the Book of Privileges indicates Columbus knew he found a new continent. Furthermore, his journals from the third voyage call the "land of Paria" a "hitherto unknown" continent. On the other hand, his other writings continued to claim that he had reached Asia, such as a 1502 letter to Pope Alexander VI where he asserted that Cuba was the east coast of Asia. He also rationalized that the new continent of South America was the "Earthly Paradise" that was located "at the end of the Orient".Thus, it remains unclear what his true beliefs were.
Commemoration

~ 1893 ~
~ Christopher Columbus ~
U.S. Columbian Issue of 1893.
The World Columbian Exposition in Chicago, 1893, commemorated the 400th anniversary of the landing of Christopher Columbus in the Americas. Over 27 million people attended the exposition during its six-month duration.
The U.S. Postal Service participated in the celebration issuing the first US commemorative postage stamps, a series of 16 postage issues called the Columbian Issue depicting Columbus, Queen Isabella and others in the various stages of his several voyages. The issues range in value from the 1-cent to the 5-dollar denominations. Under Benjamin Harrison and his Postmaster General John Wanamaker the Columbian commemorative stamps were made available and were first issued at the World Columbian Exposition in Chicago, Illinois, in 1893. Wanamaker originally introduced the idea of issuing the nation's first commemorative stamp to Harrison, the Congress and the U.S. Post Office. To demonstrate his confidence in the new Columbian commemorative issues Wanamaker purchased $10,000 worth of stamps with his own money. The Columbian Exposition lasted several months and, and over $40 million dollars in commemorative postage stamp had been sold. The 400th anniversary Columbian issues were very popular in the United States; more than a billion of the two-cent editions were printed.
In 1982, a second Columbian issue was released that was identical to the first to commemorate the 500th anniversary. These issues were made from the original dies of which the first engraved issues of 1893 were produced. In 1992 along with the United States, Spain also issued an almost identical series of Columbian issues, (using 'Spain' instead of 'United States of America') celebrating the 500th anniversary of the voyages.
Legacy

Columbus Lighthouse (Faro a Colón), Santo Domingo81
Although among non-Native Americans Christopher Columbus is traditionally considered the discoverer of America, Columbus was preceded by the various cultures and civilizations of the indigenous peoples of the Americas, as well as the Western world's Vikings at L'Anse aux Meadows. He is regarded more accurately as the person who brought the Americas into the forefront of Western attention. "Columbus's claim to fame isn't that he got there first," explains historian Martin Dugard, "it's that he stayed." The popular idea that he was first person to envision a rounded earth is false. The rounded shape of the earth has already been known since antiquity.

Replicas of Niña, Pinta and Santa Maria sailed from Spain to the Chicago Columbian Exposition.
Amerigo Vespucci's travel journals, published 1502-4, convinced Martin Waldseemüller that the discovered place was not India, as Columbus always believed, but a new continent, and in 1507, a year after Columbus's death, Waldseemüller published a world map calling the new continent America from Vespucci's Latinized name "Americus". According to Paul Lunde, "The preoccupation of European courts with the rise of the Ottoman Turks in the East partly explains their relative lack of interest in Columbus's discoveries in the West."

Columbus monument near the state capitol in Denver, Colorado
Historically, the British had downplayed Columbus and emphasized the role of the Venetian John Cabot as a pioneer explorer, but for the emerging United States, Cabot made for a poor national hero. Veneration of Columbus in America dates back to colonial times. The name Columbia for "America" first appeared in a 1738 weekly publication of the debates of the British Parliament. The use of Columbus as a founding figure of New World nations and the use of the word 'Columbia', or simply the name 'Columbus', spread rapidly after the American Revolution. In 1812, the name 'Columbus' was given to the newly founded capital of Ohio. During the last two decades of the 18th century the name "Columbia" was given to the federal capital District of Columbia, South Carolina's new capital city Columbia, the Columbia River, and numerous other places. Columbia is also the name of NASA's first Space shuttle and was the first to launch into orbit. Outside the United States the name was used in 1819 for the Gran Colombia, a precursor of the modern Republic of Colombia. The main plaza in Mayagüez, Puerto Rico is called Plaza Colón in honor of the Admiral.
A candidate for sainthood in the Catholic Church in 1866, celebration of Columbus's legacy perhaps reached a zenith in 1892 when the 400th anniversary of his first arrival in the Americas occurred. Monuments to Columbus like the Columbian Exposition in Chicago were erected throughout the United States and Latin America extolling him. Numerous cities, towns, counties, and streets have been named after him, including the capital cities of two U.S. states: Ohio and South Carolina.

House of Columbus, by Comas Quesada. A museum complex devoted to the Canarian-American history in Las Palmas de Gran Canaria.
In 1909, descendants of Columbus undertook to dismantle the Columbus family chapel in Spain and move it to Boalsburg near State College, Pennsylvania, where it may now be visited by the public. At the museum associated with the chapel, there are a number of Columbus relics worthy of note, including the armchair which the "Admiral of the Ocean Sea" used at his chart table.
More recent views of Columbus, particularly those of Native Americans, have tended to be much more critical. This is because the native Taino of Hispaniola, where Columbus began a rudimentary tribute system for gold and cotton, disappeared so rapidly after contact with the Spanish, due to overwork and especially, after 1519, when the first pandemic struck Hispaniola, due to European diseases. Some estimates indicate case fatality rates of 80–90% in Native American populations during smallpox epidemics. The native Taino people of the island were systematically enslaved via the encomienda system. The pre-Columbian population is estimated to have been perhaps 250,000–300,000. According to the historian Gonzalo Fernandez de Oviedo y Valdes by 1548, 56 years after Columbus landed, less than five hundred Taino were left on the island. In another hundred years, perhaps only a handful remained. However, some analyses of the question of Columbus's legacy for Native Americans do not clearly distinguish between the actions of Columbus himself, who died well before the first pandemic to hit Hispaniola or the height of the encomienda system, and those of later European governors and colonists on Hispaniola.
There is increasing modern scientific evidence that the first voyage also brought syphilis back from the New World. Many of the crew members who served on this voyage later joined the army of King Charles VIII in his invasion of Italy in 1495 resulting in the spreading of the disease across Europe and as many as 5 million deaths.
The anniversary of Columbus's 1492 landing in the Americas is usually observed as Columbus Day on 12 October in Spain and throughout the Americas, except Canada. In the United States it is observed annually on the second Monday in October.
The term "pre-Columbian" is usually used to refer to the peoples and cultures of the Americas before the arrival of Columbus and his European successors.
Physical appearance

Although an abundance of artwork involving Christopher Columbus exists, no authentic contemporary portrait has been found.98 James W. Loewen, author of Lies My Teacher Told Me, said that the various posthumous portraits have no historical value.
Sometime between 1505 and 1536, Alejo Fernández painted an altarpiece, The Virgin of the Navigators, that includes a depiction of Columbus. The painting was commissioned for a chapel in Seville's Casa de Contratación (House of Trade) and remains there to this day, as the earliest known painting about the discovery of the Americas.
At the 1893 World's Columbian Exposition, 71 alleged portraits of Columbus were displayed, most did not match contemporary descriptions. These writings describe him as having reddish or blond hair, which turned to white early in his life, light colored eyes, as well as being a lighter skinned person with too much sun exposure turning his face red.
In keeping with descriptions of Columbus having had auburn hair or (later) white hair, textbooks have used the Sebastiano del Piombo painting (which in its normal-sized resolution shows Columbus's hair as auburn) so often that it has become the iconic image of Columbus accepted by popular culture. Accounts consistently describe Columbus as a large and physically strong man of some six feet or more in height, easily taller than the average European of his day.
Popular culture

Isabella and Columbus by Larkin Mead under dome of California State Capitol
Columbus, an important historical figure, has been depicted in fiction, cinema and television, and in other media and entertainment, such as stage plays, music, cartoons and games.
In games
In literature
  • In 1889, American author Mark Twain based the time traveler's trick in A Connecticut Yankee in King Arthur's Court on Columbus' successful prediction of a lunar eclipse during his fourth voyage to the New World.
  • In 1941 the British author Rafael Sabatini published a novel Columbus, based on a screenplay he had written for a planned film. The story provided the inspiration for the 1949 film about Columbus.
  • In 1958, the Italian playwright Dario Fo wrote a satirical play about Columbus titled Isabella, tre caravelle e un cacciaballe (Isabella, three tall ships and a con man). In 1997 Fo was awarded the Nobel Prize in Literature. The play was translated into English in 1988 by Ed Emery and is downloadable on the internet.
  • In 1991, author Salman Rushdie published a fictional representation of Columbus in The New Yorker, "Christopher Columbus and Queen Isabella of Spain Consummate Their Relationship, Santa Fe, January, 1492".
  • In Pastwatch: The Redemption of Christopher Columbus (1996) science fiction novelist Orson Scott Card focuses on Columbus' life and activities, but the novel's action also deals with a group of scientists from the future who travel back to the 15th century with the goal of changing the pattern of European contact with the Americas.
  • British author Stephen Baxter includes Columbus' quest for royal sponsorship as a crucial historical event in his 2007 science fiction novel Navigator (ISBN 978-0-441-01559-7), the third entry in the author's Time's Tapestry Series.
In music
  • Christopher Columbus is regularly referred to by singers and musical groups in the Rastafari movement as an example of a European oppressor. The detractors include Burning Spear (Christopher Columbus), Culture (Capture Rasta), and Peter Tosh (You Can't Blame The Youth, Here Comes The Judge).
Onscreen

Columbus by Mary Lawrence
In sculpture
In space