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Grotto Point Light
Grotto Point Light, also known as Port Jackson Entrance Range Front Light, is an active lighthouse located at Grotto Point, a rocky headland at the southernmost tip of Balgowlah Heights, New South Wales, Australia, on the north side of Sydney Harbour. It serves as the front range light, Rosherville Light serving as the rear light, into Port Jackson. Rosherville Light is located almost exactly ( to be exact) behind Grotto Point Light. History The decision to build the range lights was taken in 1909. Construction began in 1910 and the light was first lit on September 1, 1911. It is one of four lighthouses in a style sometimes called "Disney Castle", the others being Rosherville Light, Vaucluse Bay Range Front Light and Vaucluse Bay Range Rear Light. The original light source was a carbide lamp (acetylene gas) which was initially generated on-site, and later replaced by compressed gas cylinders brought by boat. Later, the light was electrified and connected to the mains ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balgowlah Heights, New South Wales
Balgowlah Heights is a suburb of northern Sydney, in the state of New South Wales, Australia 11 kilometres north-east of the Sydney central business district in the local government area of Northern Beaches Council, in the Northern Beaches region. Balgowlah Heights shares the postcode 2093 with the adjacent Balgowlah and North Balgowlah. Situated on a ridge up to 80 metres above North Harbour and Middle Harbour, some houses have panoramic views of the harbour, Eastern Suburbs and Spit Bridge. The suburb features remnant Sydney Harbour bushland, contained in the National Park around Dobroyd Head and Grotto Point. Tania Park at the eastern fringe offers relaxed recreation and one can watch the Manly ferry cut its way to Circular Quay. History Balgowlah was named in 1832 after an Aboriginal word meaning ''north harbour'' in reference to its position on Port Jackson. The area was not developed until the 1960s.''The Book of Sydney Suburbs'', Compiled by Frances Pollon, Angus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbide Lamp
Carbide lamps, or acetylene gas lamps, are simple lamps that produce and burn acetylene (C2H2) which is created by the reaction of calcium carbide (CaC2) with water (H2O). Acetylene gas lamps were used to illuminate buildings, as lighthouse beacons, and as headlights on motor-cars and bicycles. Portable acetylene gas lamps, worn on the hat or carried by hand, were widely used in mining in the early twentieth century. They are still employed by cavers, hunters, and cataphiles. Small carbide lamps called "carbide candles" or "smokers" are used for blackening rifle sights to reduce glare. They are sometimes referred to as "smokers" because of the sooty flame produced by acetylene. Mechanism A mining or caving lamp has calcium carbide placed in a lower chamber, the generator. The upper reservoir is then filled with water. A threaded valve or other mechanism is used to control the rate at which the water is allowed to drip into the chamber containing the calcium carbide. By ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lighthouses Completed In 1910
A lighthouse is a tower, building, or other type of physical structure designed to emit light from a system of lamps and lenses and to serve as a beacon for navigational aid, for maritime pilots at sea or on inland waterways. Lighthouses mark dangerous coastlines, hazardous shoals, reefs, rocks, and safe entries to harbors; they also assist in aerial navigation. Once widely used, the number of operational lighthouses has declined due to the expense of maintenance and has become uneconomical since the advent of much cheaper, more sophisticated and effective electronic navigational systems. History Ancient lighthouses Before the development of clearly defined ports, mariners were guided by fires built on hilltops. Since elevating the fire would improve the visibility, placing the fire on a platform became a practice that led to the development of the lighthouse. In antiquity, the lighthouse functioned more as an entrance marker to ports than as a warning signal for reefs and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Creative Commons License
A Creative Commons (CC) license is one of several public copyright licenses that enable the free distribution of an otherwise copyrighted "work".A "work" is any creative material made by a person. A painting, a graphic, a book, a song/lyrics to a song, or a photograph of almost anything are all examples of "works". A CC license is used when an author wants to give other people the right to share, use, and build upon a work that the author has created. CC provides an author flexibility (for example, they might choose to allow only non-commercial uses of a given work) and protects the people who use or redistribute an author's work from concerns of copyright infringement as long as they abide by the conditions that are specified in the license by which the author distributes the work. There are several types of Creative Commons licenses. Each license differs by several combinations that condition the terms of distribution. They were initially released on December 16, 2002, by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dictionary Of Sydney
The Dictionary of Sydney is a digital humanities project to produce an online, expert-written encyclopedia of all aspects of the history of Sydney. Description The Dictionary is a partnership between the City of Sydney, the University of Sydney, the State Library of New South Wales, the State Records Authority of New South Wales, and the University of Technology Sydney. It began in 2007 with Australian Research Council funding and launched on 5 November 2009. Geographically, the Dictionary of Sydney includes the whole Sydney basin and chronologically spans the years from the earliest human habitation to the present. It also invites historical contributions from disciplines such as archaeology, sociology, literary studies, historical geography and cultural studies. Heurist, developed by the University of Sydney was the underlying technology for the project. The Dictionary of Sydney won an Energy Australia National Trust Heritage Award for Interpretation and Presentation in Ap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Lighthouses In Australia
This is a list of lighthouses and lightvessels in Australia. Australia has a coastline of , with over 350 lighthouses and navigational aids around the Australian coastline, and a single inland lighthouse, the Point Malcolm lighthouse. The first lighthouse was Macquarie Lighthouse, which was lit in 1793 as a tripod mounted wood and coal fired beacon. The last staffed lighthouse was Maatsuyker Island Lighthouse, off the south coast of Tasmania, which was automated in 1996. Listing The lighthouses and lightvessels of Australia are listed in the National Geospatial-Intelligence Agency ''List of Lights'' publication 111. They are listed by the United Kingdom Hydrographic Office on volume K of the ''Admiralty List of Lights & Fog Signals''. The ''ARLHS World List of Lights'' lists them with the prefix "AUS". On ''The Lighthouse Directory'', the lighthouses of Australia are listed according to their location: * Coral Sea Islands Territory * New South Wales, including Cape St George ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hiking
Hiking is a long, vigorous walk, usually on trails or footpaths in the countryside. Walking for pleasure developed in Europe during the eighteenth century.AMATO, JOSEPH A. "Mind over Foot: Romantic Walking and Rambling." In ''On Foot: A History of Walking'', 101-24. NYU Press, 2004. Accessed March 1, 2021. http://www.jstor.org/stable/j.ctt9qg056.7. Religious pilgrimages have existed much longer but they involve walking long distances for a spiritual purpose associated with specific religions. "Hiking" is the preferred term in Canada and the United States; the term "walking" is used in these regions for shorter, particularly urban walks. In the United Kingdom and the Republic of Ireland, the word "walking" describes all forms of walking, whether it is a walk in the park or backpacking in the Alps. The word hiking is also often used in the UK, along with rambling , hillwalking, and fell walking (a term mostly used for hillwalking in northern England). The term bushwalking is end ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sydney Harbour National Park
The Sydney Harbour National Park is an Australian national park comprising parts of Port Jackson, Sydney and its foreshores and various islands. The national park lies in New South Wales and was created progressively, from 1975. The national park protects the landforms of Bradleys Head, Clark Island, Dobroyd Head, Fort Denison, Georges Head, Goat Island, Middle Head, Nielsen Park, Rodd Island, Shark Island, Sydney Heads including the Quarantine Station at North Head and The Gap bluff at South Head. The national park also protects the waterway between North Head and Dobroyd Head, defined as the North Sydney Harbour Aquatic Reserve. Parts of the national park lie outside the harbour and face the Tasman Sea. The national park is managed by the NSW National Parks and Wildlife Service. History Residential development has impacted a significant amount of the harbour foreshores over many years. Much of what remained was preserved partly due to the presence of military bases, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Department Of Environment, Climate Change And Water (New South Wales)
The New South Wales Office of Environment and Heritage (OEH), a former division of the Government of New South Wales between April 2011 and July 2019, was responsible for the care and protection of the environment and heritage, which includes the natural environment, Aboriginal country, culture and heritage, and built heritage in New South Wales, Australia. The OEH supported the community, business and government in protecting, strengthening and making the most of a healthy environment and economy within the state. The OEH was part of the Department of Planning and Environment cluster and managed national parks and reserves. Following the 2019 state election, the agency was abolished and most functions of the agency were assumed by the Department of Planning, Industry and Environment with effect from 1 July 2019. The heritage functions were assumed by the Department of Premier and Cabinet, but would be transferred back to the Department of Planning and Environment on 1 Apri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catadioptric
A catadioptric optical system is one where refraction and reflection are combined in an optical system, usually via lenses (dioptrics) and curved mirrors (catoptrics). Catadioptric combinations are used in focusing systems such as searchlights, headlamps, early lighthouse focusing systems, optical telescopes, microscopes, and telephoto lenses. Other optical systems that use lenses and mirrors are also referred to as "catadioptric", such as surveillance catadioptric sensors. Early catadioptric systems Catadioptric combinations have been used for many early optical systems. In the 1820s, Augustin-Jean Fresnel developed several catadioptric lighthouse reflectors. Léon Foucault developed a catadioptric microscope in 1859 to counteract aberrations of using a lens to image objects at high power. In 1876 a French engineer, A. Mangin, invented what has come to be called the Mangin mirror, a concave glass reflector with the silver surface on the rear side of the glass. The two surfaces o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mains Electricity
Mains electricity or utility power, power grid, domestic power, and wall power, or in some parts of Canada as hydro, is a general-purpose alternating-current (AC) electric power supply. It is the form of electrical power that is delivered to homes and businesses through the electric grid in many parts of the world. People use this electricity to power everyday items—such as domestic appliances, televisions and lamps—by plugging them into a wall outlet. The voltage and frequency of electric power differs between regions. In much of the world, a voltage (nominally) of 230 volts and frequency of 50 Hz is used. In North America, the most common combination is 120 V and a frequency of 60 Hz. Other combinations exist, for example, 230 V at 60 Hz. Travellers' portable appliances may be inoperative or damaged by foreign electrical supplies. Non-interchangeable plugs and sockets in different regions provide some protection from accidental use of appliances ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Daily Telegraph (Sydney)
''The Daily Telegraph'', also nicknamed ''The Tele'', is an Australian tabloid newspaper published by Nationwide News Pty Limited, a subsidiary of News Corp Australia, itself a subsidiary of News Corp. It is published Monday through Saturday and is available throughout Sydney, across most of regional and remote New South Wales, the Australian Capital Territory and South East Queensland. A 2013 poll conducted by Essential Research found that the ''Telegraph'' was Australia's least-trusted major newspaper, with 49% of respondents citing "a lot of" or "some" trust in the paper. Amongst those ranked by Nielsen, the ''Telegraph'' website is the sixth most popular Australian news website with a unique monthly audience of 2,841,381 readers. History ''The Daily Telegraph'' was founded in 1879, by John Mooyart Lynch, a former printer, editor and journalist who had once worked on the ''Melbourne Daily Telegraph''. Lynch had failed in an attempt to become a politician and was lookin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
