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Wadjemup Lighthouse
Completed in 1849, the original Wadjemup Lighthouse (also known as Rottnest Island Light Station) was Western Australia's first stone lighthouse and was built to provide a safer sailing passage for ships to Fremantle Port and the Swan River Colony. A second and larger replacement tower was built on the same site in 1896. It is the fourth oldest extant lighthouse in Western Australia and was Australia's first rotating beam lighthouse. A shipwreck that was partly caused by poor communications and misunderstood signals from the lighthouse prompted the construction of another lighthouse on the island in 1900. Location selection and obelisk Rottnest Island is the largest and northernmost of several islands near the Port of Fremantle. It is from the mouth of the Swan River and is generally the first land sighted by ships arriving from the west. The island is long and at its widest point, with a total land area of . The lighthouse site is at the highest point of the island, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rottnest Island
Rottnest Island ( nys, Wadjemup), often colloquially referred to as "Rotto", is a island off the coast of Western Australia, located west of Fremantle. A sandy, low-lying island formed on a base of aeolianite limestone, Rottnest is an A-class reserve, the highest level of protection afforded to public land. Together with Garden Island, Rottnest Island is a remnant of Pleistocene dune ridges. Along with several other islands, Rottnest became separated from the mainland around 7,000 years ago, when sea levels rose; the traditional Noongar name for the island is ''Wadjemup'', which means "place across the water where the spirits are". Human artefacts have been found on the island dating back at least 30,000 years, but visitation and habitation of the island by the Noongar people appears to have ceased following its separation from the mainland. The island was first documented by Willem de Vlamingh in 1696, who called it t Eylandt 't Rottenest'' ("Rats' Nest Island") after the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Obelisk
An obelisk (; from grc, ὀβελίσκος ; diminutive of ''obelos'', " spit, nail, pointed pillar") is a tall, four-sided, narrow tapering monument which ends in a pyramid-like shape or pyramidion at the top. Originally constructed by Ancient Egyptians and called ''tekhenu'', the Greeks used the Greek term to describe them, and this word passed into Latin and ultimately English. Ancient obelisks are monolithic; they consist of a single stone. Most modern obelisks are made of several stones. Ancient obelisks Egyptian Obelisks were prominent in the architecture of the ancient Egyptians, and played a vital role in their religion placing them in pairs at the entrance of the temples. The word "obelisk" as used in English today is of Greek rather than Egyptian origin because Herodotus, the Greek traveler, was one of the first classical writers to describe the objects. A number of ancient Egyptian obelisks are known to have survived, plus the " Unfinished Obelisk" found p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colza Oil
Close-up of canola blooms Canola flower Rapeseed oil is one of the oldest known vegetable oils. There are both edible and industrial forms produced from rapeseed, the seed of several cultivars of the plant family Brassicaceae. Historically, it was eaten in limited quantities due to high levels of erucic acid, which is damaging to the cardiac muscle of animals and imparts a bitter taste, and glucosinolates, which made it less nutritious in animal feed. Rapeseed oil can contain up to 54% erucic acid. Canola oil is a food-grade version derived from rapeseed cultivars bred for low erucic acid content. Also known as low erucic acid rapeseed (LEAR) oil, it has been generally recognized as safe by the United States Food and Drug Administration. Canola oil is limited by government regulation to a maximum of 2% erucic acid by weight in the US and the EU, with special regulations for infant food. These low levels of erucic acid do not cause harm in humans. In commerce, non-food varie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coconut Oil
frameless , right , alt = A cracked coconut and a bottle of coconut oil Coconut oil (or coconut butter) is an edible oil derived from the wick, meat, and milk of the coconut palm fruit. Coconut oil is a white solid fat; in warmer climates during the summer months it is a clear thin liquid oil, melting at warmer room temperatures of around . Unrefined varieties have a distinct coconut aroma. It is used as a food oil, and in industrial applications for cosmetics and detergent production. Due to its high levels of saturated fat, numerous health authorities recommend limiting its consumption as a food.Media summary: Production Oil production is dependent upon palm cultivation. Oil production is thus threatened by coconut pests. This means most significantly the ''Oryctes'' rhinoceros beetles especially the Asiatic Rhinoceros Beetle ('' O. rhinoceros'') and the Red Palm Weevil ('' Rhynchophorus ferrugineus''). Coconut oil can be extracted through a wet or dry process. M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parabolic Reflector
A parabolic (or paraboloid or paraboloidal) reflector (or dish or mirror) is a reflective surface used to collect or project energy such as light, sound, or radio waves. Its shape is part of a circular paraboloid, that is, the surface generated by a parabola revolving around its axis. The parabolic reflector transforms an incoming plane wave travelling along the axis into a spherical wave converging toward the focus. Conversely, a spherical wave generated by a point source placed in the focus is reflected into a plane wave propagating as a collimated beam along the axis. Parabolic reflectors are used to collect energy from a distant source (for example sound waves or incoming star light). Since the principles of reflection are reversible, parabolic reflectors can also be used to collimate radiation from an isotropic source into a parallel beam. In optics, parabolic mirrors are used to gather light in reflecting telescopes and solar furnaces, and project a beam of lig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Augustus Gregory
Sir Augustus Charles Gregory (1 August 1819 – 25 June 1905) was an English-born Australian explorer and surveyor. Between 1846 and 1858 he undertook four major expeditions. He was the first Surveyor-General of Queensland. He was appointed a lifetime Member of the Queensland Legislative Council. Early years Augustus Charles Gregory was born at Farnsfield, Nottingham, England. He was the second of five brothers born to Joshua Gregory and Frances Churchman. Among his brothers were Francis Thomas Gregory, who also became a noted explorer. #Joshua William Gregory, born 1815, died 20 September 1850 aged 35. #Augustus Charles Gregory, born 1 August 1819, died 1905 aged 86 #Francis (Frank) Thomas Gregory, born 1821. #Henry Churcham Gregory, born 1823, died London 29 July 1903 aged 79 years #Charles Frederick Gregory, born 1825. A. C. Gregory was educated privately by tutors and later by his mother. In 1829, the family emigrated to Western Australia on board the '' Lotus'', arri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catoptric
Catoptrics (from grc-gre, κατοπτρικός ''katoptrikós'', "specular", from grc-gre, κάτοπτρον ''katoptron'' "mirror") deals with the phenomena of reflected light and image-forming optical systems using mirrors. A catoptric system is also called a ''catopter'' (''catoptre''). Ancient texts ''Catoptrics'' is the title of two texts from ancient Greece: *The Pseudo-Euclidean ''Catoptrics''. This book is attributed to Euclid, although the contents are a mixture of work dating from Euclid's time together with work which dates to the Roman period., accessed 31 January 2013 It has been argued that the book may have been compiled by the 4th century mathematician Theon of Alexandria. The book covers the mathematical theory of mirrors, particularly the images formed by plane and spherical concave mirrors. *Hero's ''Catoptrics''. Written by Hero of Alexandria, this work concerns the practical application of mirrors for visual effects. In the Middle Ages, this work was f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry Revett Bland
Henry may refer to: People * Henry (given name) * Henry (surname) * Henry Lau, Canadian singer and musician who performs under the mononym Henry Royalty * Portuguese royalty ** King-Cardinal Henry, King of Portugal ** Henry, Count of Portugal, Henry of Burgundy, Count of Portugal (father of Portugal's first king) ** Prince Henry the Navigator, Infante of Portugal ** Infante Henrique, Duke of Coimbra (born 1949), the sixth in line to Portuguese throne * King of Germany ** Henry the Fowler (876–936), first king of Germany * King of Scots (in name, at least) ** Henry Stuart, Lord Darnley (1545/6–1567), consort of Mary, queen of Scots ** Henry Benedict Stuart, the 'Cardinal Duke of York', brother of Bonnie Prince Charlie, who was hailed by Jacobites as Henry IX * Four kings of Castile: **Henry I of Castile **Henry II of Castile **Henry III of Castile **Henry IV of Castile * Five kings of France, spelt ''Henri'' in Modern French since the Renaissance to italianize the name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthur Head
Arthur Head (also known as Arthur's Head) in Fremantle, Western Australia, is a former large limestone headland on the southern side of the mouth of the Swan River, now also the entry to Fremantle Harbour. Historian Bob Reece identifies the geographical prominence of the location in his entry in the Historical Encyclopedia of Western Australia: Also the strategic quality of the head is noted as: In May 1829 the strategic location of Arthur Head led it being chosen by Captain Charles Fremantle RN as the site for his fortified beach camp. It has been significantly altered since European settlement in the 1830s, and is the site of a large number of demolished structures. Archaeologist Michael Pearson in his 1984 report identified the following: * 1851 Lighthouse (first) * 1876 Lighthouse (second): in diameter, high; constructed by convicts in 1876–1879; decommissioned in 1902. * 1834 Courthouse (first) * 1840 Courthouse (second) * 1852 Police station complex * Lightho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite, a closely related rock, which contains a high percentage of the mineral dolomite, . ''Magnesian limestone'' is an obsolete and poorly-defined term used variously for dolomite, for limes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perth
Perth is the capital and largest city of the Australian state of Western Australia. It is the fourth most populous city in Australia and Oceania, with a population of 2.1 million (80% of the state) living in Greater Perth in 2020. Perth is part of the South West Land Division of Western Australia, with most of the metropolitan area on the Swan Coastal Plain between the Indian Ocean and the Darling Scarp. The city has expanded outward from the original British settlements on the Swan River, upon which the city's central business district and port of Fremantle are situated. Perth is located on the traditional lands of the Whadjuk Noongar people, where Aboriginal Australians have lived for at least 45,000 years. Captain James Stirling founded Perth in 1829 as the administrative centre of the Swan River Colony. It was named after the city of Perth in Scotland, due to the influence of Stirling's patron Sir George Murray, who had connections with the area. It gained c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry Trigg
Henry Trigg (1791–1882) was the Superintendent of Public Works in Western Australia from 1839 to 1851 and founder of the Congregational Church in Perth. Biography Henry Trigg was born on 30 June 1791 in Gloucester, England, the son of Henry and Mary Trigg. In 1813 he married Amelia Ralph (b. 1791) and they had seven children, Eliza, Harriet, Emma, Jane, Amelia, Henry and William, prior to him leaving England. Trigg was a carpenter and a businessman but due to the economic depression in England following the Battle of Waterloo he felt that his family would have a better chance in the colonies and decided to emigrate to the Swan River Colony, leaving his family until he was set up and could afford their passage. At the age of 38, he emigrated to Western Australia, arriving on the in October 1829. His personal wealth (£200) allowed him to take up a land grant of in the colony. Trigg's grant encompasses what is now the suburb of Churchlands. In 1831, Amelia and their sev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
