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Perkins Island Light
Perkins Island Light is a lighthouse on the Kennebec River in Maine. It was established in 1898, as part of a major upgrade of the river's lights — the Doubling Point Light and the separate Range Lights on the point, Perkins Island Light, and Squirrel Point Light were all built at the same time. It was listed on the National Register of Historic Places as Perkins Island Light Station in 1988. Description and history Perkins Island is a small, predominantly wooded island in the southern reaches of the Kennebec River, on the west side of Georgetown Island. It has a teardrop shape, oriented north–south, with the light station located at the westernmost part of the island. The station consists of a tower, keeper's house, barn, bell house, and oil house. The tower is a tapered octagonal wood-frame structure, with its exterior clad in wooden shingles. The lantern light stands above its base, in an octagonal lanternhouse with a surrounding exterior gallery. The keep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kennebec River
The Kennebec River (Abenaki language, Abenaki: ''Kinəpékʷihtəkʷ'') is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map , accessed June 30, 2011 river within the U.S. state of Maine. It rises in Moosehead Lake in west-central Maine. The East and West Outlets join at Indian Pond and the river flows southward. Harris Station Dam, the largest hydroelectric dam in the state, was constructed near that confluence. The river is joined at The Forks, Maine, The Forks by its tributary the Dead River (Kennebec River), Dead River, also called the West Branch. It continues south past the cities of Madison, Maine, Madison, Skowhegan, Maine, Skowhegan, Waterville, Maine, Waterville, and the state capital Augusta, Maine, Augusta. At Richmond, Maine, Richmond, it flows into Merrymeeting Bay, a freshwater tidal bay into which also flow the Androscoggin River and five smaller rivers. The Kennebec runs past the shipbuilding center of Bath, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fresnel Lens
A Fresnel lens ( ; ; or ) is a type of composite compact lens developed by the French physicist Augustin-Jean Fresnel (1788–1827) for use in lighthouses. It has been called "the invention that saved a million ships." The design allows the construction of lenses of large aperture and short focal length without the mass and volume of material that would be required by a lens of conventional design. A Fresnel lens can be made much thinner than a comparable conventional lens, in some cases taking the form of a flat sheet. The simpler dioptric (purely refractive) form of the lens was first proposed by Count Buffon and independently reinvented by Fresnel. The ''catadioptric'' form of the lens, entirely invented by Fresnel, has outer elements that use total internal reflection as well as refraction; it can capture more oblique light from a light source and add it to the beam of a lighthouse, making the light visible from greater distances. Description The Fresnel lens redu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georgetown, Maine
Georgetown is a town in Sagadahoc County, Maine, United States. The population was 1,058 at the 2020 census. Home to Reid State Park, the town is part of the Portland– South Portland–Biddeford, Maine Metropolitan Statistical Area. Located on an island accessible by car from the mainland, Georgetown includes the villages of Five Islands, Georgetown, Bay Point, Marrtown, West Georgetown and Robinhood. It is a popular tourist destination. History Abenaki Indians called the island Erascohegan, possibly meaning "good spear-fishing." Other interpretations of the word suggest that it meant "a watching place." John Parker, a fisherman from Bedfordshire, England, purchased it in 1649 from Chief Mowhotiwormet, commonly known as Chief Robinhood, for a hogshead of rum and some pumpkins. Parker built the first permanent homestead on what eventually became known as Parker's Island. The Kennebec River valley was attacked and burned in 1676 during King Philip's War, then again i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lighthouse
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 a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doubling Point Light
Doubling Point Light is a lighthouse on the Kennebec River in Arrowsic, Maine. It was established in 1898, fifteen years after the founding of the Bath Iron Works, a major shipbuilder, upriver. It was part of a major upgrade of the river's lights — the Doubling Point Light and the separate Doubling Point Range Lights, Range Lights on the point, Perkins Island Light, and Squirrel Point Light were all built at the same time. The light was listed on the National Register of Historic Places as Doubling Point Light Station on January 21, 1988. It remains an active aid to navigation. Description and history The Doubling Point Light is located on the lower Kennebec River, at a point where the normally south-flowing river makes a sharp turn to the east, followed by a turn back to the south. The light is set at the inside corner of the first of these turns, on the west side of Arrowsic Island, roughly opposite the mouth of Winnegance Creek. The light station includes a tower ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doubling Point Range Lights
The Doubling Point Range Lights are a pair of range lights on the Kennebec River, in Arrowsic, Maine. Built in 1898 as part of a major improvement on navigational aids on the river, they are the only surviving pair of range lights in the state. They were listed on the National Register of Historic Places as Kennebec River Light Station on January 21, 1988. Description and history The Doubling Point Range Lights are located on the lower Kennebec River, at a point where the normally south-flowing river makes a sharp turn to the east, followed by a turn back to the south. The range lights are set on the north side of the second turn; the first is marked by the Doubling Point Light. The range lights are oriented so that they are in alignment when seen from the main channel to the south. The light station consists of two octagonal wood frame towers, a keeper's house, and an oil house. The towers are joined to the keeper's house by wooden walkways with railings. The southern tower ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Squirrel Point Light
Squirrel Point Light is a lighthouse marking the southwestern point of Arrowsic Island on the Kennebec River. It was established in 1898, as part of a major upgrade of the river's lights — the Doubling Point Light and the separate Range Lights on the point, Perkins Island Light, and Squirrel Point Light were all built at the same time. The light station was listed on the National Register of Historic Places as Squirrel Point Light Station on January 21, 1988. Description and history Arrowsic Island is a large island on the Mid Coast of Maine, bounded by a number of tidal rivers. The main one, the Kennebec River, is on the west side of the island, flowing south from the major port and shipbuilding city of Bath to the Gulf of Maine. Squirrel Point is the southwestern tip of the island. The light station at Squirrel Point includes a tower, keeper's house, barn, boathouse, and oil house. The tower is an octagonal wood-frame structure, with the lantern house topped by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Register Of Historic Places
The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance or "great artistic value". A property listed in the National Register, or located within a National Register Historic District, may qualify for tax incentives derived from the total value of expenses incurred in preserving the property. The passage of the National Historic Preservation Act (NHPA) in 1966 established the National Register and the process for adding properties to it. Of the more than one and a half million properties on the National Register, 95,000 are listed individually. The remainder are contributing resources within historic districts. For most of its history, the National Register has been administered by the National Park Service (NPS), an agency within the U.S. Department of the Interior. Its goals are to help property owners and inte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aids To Navigation
Human immunodeficiency virus infection and acquired immunodeficiency syndrome (HIV/AIDS) is a spectrum of conditions caused by infection with the human immunodeficiency virus (HIV), a retrovirus. Following initial infection an individual may not notice any symptoms, or may experience a brief period of influenza-like illness. Typically, this is followed by a prolonged incubation period with no symptoms. If the infection progresses, it interferes more with the immune system, increasing the risk of developing common infections such as tuberculosis, as well as other opportunistic infections, and tumors which are rare in people who have normal immune function. These late symptoms of infection are referred to as acquired immunodeficiency syndrome (AIDS). This stage is often also associated with unintended weight loss. HIV is spread primarily by unprotected sex (including anal and vaginal sex), contaminated blood transfusions, hypodermic needles, and from mother to child duri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Register Of Historic Places Listings In Sagadahoc County, Maine
This is a list of the National Register of Historic Places listings in Sagadahoc County, Maine. This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Sagadahoc County, Maine, United States. Latitude and longitude coordinates are provided for many National Register properties and districts; these locations may be seen together in a map. There are 60 properties and districts listed on the National Register in the county. One property was once listed, but has since been removed. Current listings Former listing See also * List of National Historic Landmarks in Maine __NOTOC__ This is a complete List of National Historic Landmarks in Maine. The United States National Historic Landmark program is operated under the auspices of the National Park Service, and recognizes structures, districts, objects, and similar ... * National Register of Histor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lighthouses Completed In 1898
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] |
Lighthouses On The National Register Of Historic Places In Maine
A lighthouse is a tower, building, or other type of physical structure designed to emit light from a system of lamps and lens (optics), 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 signa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
