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Cellulose-based plastics: celluloid and rayon

All Goodyear had completed with vulcanization was improving the properties of a usual polymer. The next logical step was to use a normal polymer, cellulose, as the basis for a new material.

Inventors were particularly involved in developing synthetic substitutes for those natural materials that were exclusive and in short deliver, since that meant a profitable market to exploit. Ivory was a particularly attractive target for a synthetic substitution.

An Englishman from Birmingham named Alexander Parkes developed a "synthetic ivory" named "pyroxlin", which he marketed below the trade name "Parke sine", and which won a bronze medal at the 1862 World's fair in London. Parke sine was prepared from cellulose treated with nitric acid and a solvent. The productivity of the process hardened into a tough, ivory-like material that might be molded when heated.
Recent history The sun rising over Stonehenge on the Summer solstice 2005 By the beginning of the 20th century a number of the stones had fallen or were leaning precariously, probably due to the increase in curious visitors clambering on them during the nineteenth century. Three phases of conservation work were undertaken which righted some unstable or fallen stones and carefully replaced them in their original positions using information from antiquarian drawings.Stonehenge is a place of pilgrimage for neo-druids and those following pagan or neo-pagan beliefs. The midsummer sunrise began attracting modern visitors in 1870s, with the first record of recreated Druidic practices dating to 1905 when the Ancient Order of Druids enacted a ceremony. Despite efforts by archaeologists and historians to stress the differences between the Iron Age Druidic religion, the much older monument and modern Druidry, Stonehenge has become increasingly, almost inextricably, associated with British Druidism, Neo Paganism and New Age philosophy.The earlier rituals were augmented by the Stonehenge free festival, held between 1972 and 1984, and loosely organised by the Politantric Circle. However, in 1985 the site was closed to festivalgoers by English Heritage and the National Trust by which time the number of midsummer visitors had risen from 500 to 30,000. A consequence of the end of the festival was the violent confrontation between the police and new age travellers that became known as the Battle of the Beanfield when police blockaded a convoy of travellers to prevent them from approaching Stonehenge. There was then no midsummer access for almost fifteen years until limited opening was negotiated in 2000.In more recent years, the setting of the monument has been affected by the proximity of the A303 road between Amesbury and Winterbourne Stoke, and the A344. In early 2003, the Department for Transport announced that the A303 would be upgraded, including the construction of the Stonehenge road tunnel. The controversial plans have not yet been finalised by the government.Also announced has been a new heritage centre, which was intended to be open in 2006. Current provision for visitors has often been criticised; in 1993 Stonehenge's presentation was condemned by the Public Accounts Committee of the British House of Commons as 'a national disgrace'. English Heritage proposes a new purpose-built facility 3km from the stones at Countess Road in Amesbury, on the edge of the World Heritage Site boundary. Locals in Amesbury have complained that the scheme would shift traffic congestion from Stonehenge to their own village. They have also suggested that the necessary time that the public would now have to spend travelling to and from Stonehenge would likely dissuade many visitors, especially American and Japanese tourists on whistle-stop tours of England, from visiting at all.In July 2005 the plans were thrown into uncertainty following refusal of planning permission for the visitors' centre by Salisbury District Council whilst the British government placed the rising costs of the road scheme under review.
Milky way
The Milky Way is a barred spiral galaxy of the Local Group. Though the Milky Way is but one of billions of galaxies in the universe, the Galaxy has special significance to people as it is the home of the Solar System. Democritus was the first known person to claim that the Milky Way consists of distant stars.The term "milky" originates from the hazy band of white light appearing across the celestial sphere visible from Earth, which is included of stars and other material lying within the galactic plane. The galaxy shows brightest in the direction of Sagittarius, towards the galactic center. Relative to the celestial equator, the Milky Way passes as far north as the assembly of Cassiopeia and as remote south as the constellation of Crux, indicating the high inclination of Earth's equatorial plane and the plane of the ecliptic relative to the galactic plane. The truth that the Milky Way divides the night sky into two roughly equal hemispheres indicates that the solar system lies close to the galactic plane.

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