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Contents · Categories · Featured content · A–Z index Edward Wright (1561–1615) was an English mathematician and cartographer noted for his book Certaine Errors in Navigation, which for the first time explained the mathematical basis of the Mercator projection, and set out a reference table giving the linear scale multiplication factor as a function of latitude, calculated for each minute of arc up to a latitude of 75°. This was the essential step needed to make practical both the making and the navigational use of Mercator charts. In 1589 Elizabeth I requested that he carry out navigational studies with a raiding expedition organised by the Earl of Cumberland to the Azores to capture Spanish galleons. The expedition's route was the subject of the first map to be prepared according to Wright's projection, which was published in Certaine Errors in 1599. The same year, Wright created and published the first world map produced in England and the first to use the Mercator projection since Gerardus Mercator's original 1569 map. Apart from a number of other books and pamphlets, Wright translated John Napier's pioneering 1614 work which introduced the idea of logarithms from Latin into English. This was published after Wright's death as A Description of the Admirable Table of Logarithmes. Wright's work influenced, among other persons, Dutch astronomer and mathematician Willebrord Snellius; Adriaan Metius, the geometer and astronomer from Holland; and the English mathematician Richard Norwood. (more...) Recently featured: Candide – Noël Coward – Zinc From Wikipedia's newest articles: August 24: Heroes' Day in the Philippines (2009); Independence Day in Ukraine More anniversaries: August 23 – August 24 – August 25 The chapel of Keble College, a constituent college of the University of Oxford. Keble was established in 1870, having been built as a monument to John Keble, a leading member of the Oxford Movement, which sought to stress the Catholic nature of the Church of England. It remains distinctive for its neo-gothic red-brick buildings designed by William Butterfield. Recently featured: Redeye cicada – Anti-Israel protest in Tanzania – Stereogram Wikipedia is hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other projects: This Wikipedia is written in English. Started in 2001, it currently contains 3,009,439 articles. Many other Wikipedias are available; some of the largest are listed below. horyu.net

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