|
Marblehead Light (Massachusetts)
Marblehead Light is situated on Marblehead Neck in Essex County, Massachusetts. The current tower is a skeletal structure that replaced the original 1835 brick and wood tower in 1895. It is the only tower of its type in New England, the next similar tower is to be found at Coney Island, New York. It was listed in the National Register of Historic Places, on June 15, 1987 as number #87001479 under Lighthouses of Massachusetts Thematic Group. The United States Coast Guard Light List description is "Square skeleton tower; brown to gallery; black above". The actual light is above Mean High Water. Its fixed green light is visible for . History In August 1831, the townspeople of Marblehead requested that a lighthouse be built at the entrance to the harbor. Congress granted the wish and a 23-foot (7m) high tower was built in 1835 and commissioned on October 10, 1835. This tower had an array of ten whale oil burning lamps inside an octagonal lantern. In 1857, the old lamp system was r ... [...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] |
Marblehead, Massachusetts
Marblehead is a coastal New England town in Essex County, Massachusetts, along the North Shore (Massachusetts), North Shore. Its population was 20,441 at the 2020 United States Census, 2020 census. The town lies on a small peninsula that extends into the northern part of Massachusetts Bay. Attached to the town is a near island, known as Marblehead Neck, connected to the mainland by a narrow isthmus. Marblehead Harbor, protected by shallow shoals and rocks from the open sea, lies between the mainland and the Neck. Beside the Marblehead town center, two other villages lie within the town: the Old Town, which was the original town center, and Clifton, which lies along the border with the neighboring town of Swampscott, Massachusetts, Swampscott. A town with roots in commercial fishing and yachting, Marblehead was a major shipyard and is often referred to as the birthplace of the United States Navy, American Navy, a title sometimes disputed with nearby Beverly, Massachusetts, Beve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Essex County, Massachusetts
Essex County is a County (United States), county in the northeastern part of the U.S. state of Massachusetts. At the 2020 United States Census, 2020 census, the total population was 809,829, making it the third-most populous county in the state, and the List of the most populous counties in the United States, eightieth-most populous in the country. It is part of the Greater Boston area (the Boston–Cambridge, Massachusetts, Cambridge–Newton, Massachusetts, Newton, MA–New Hampshire, NH Metropolitan Statistical Area). The largest city in Essex County is Lynn, Massachusetts, Lynn. The county was named after the England, English county of Essex. It has two traditional county seats: Salem, Massachusetts, Salem and Lawrence, Massachusetts, Lawrence. Prior to the dissolution of the county government in 1999, Salem had jurisdiction over the Southern Essex District, and Lawrence had jurisdiction over the Northern Essex District, but currently these cities do not function as seats of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coney Island
Coney Island is a peninsular neighborhood and entertainment area in the southwestern section of the New York City borough of Brooklyn. The neighborhood is bounded by Brighton Beach and Manhattan Beach, Brooklyn, Manhattan Beach to its east, Lower New York Bay to the south and west, and Gravesend, Brooklyn, Gravesend to the north and includes the subsection of Sea Gate, Brooklyn, Sea Gate on its west. More broadly, Coney Island or sometimes for clarity the Coney Island peninsula consists of Coney Island proper, Brighton Beach, and Manhattan Beach, Brooklyn, Manhattan Beach. This was formerly the westernmost of the Outer Barrier islands on the southern shore of Long Island, but in the early 20th century it became a peninsula, connected to the rest of Long Island by Land reclamation, land fill. The origin of Coney Island's name is disputed, but the area was originally part of the colonial town of Gravesend. By the mid-19th century it had become a seaside resort, and by the late ... [...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] |
Light List
A list of lights is a publication describing lighthouses and other aids to maritime navigation. Most such lists are published by national hydrographic offices. Some nations, including the United Kingdom and the United States, publish lists that cover the whole world in many volumes. Other nations publish lists that cover only their own coasts. Canada The Canadian Coast Guard publishes the ''List of Lights, Buoys and Fog Signals'' in four volumes which are updated periodically *Newfoundland and Labrador *Inland Waters *Atlantic Coast * Pacific Coast The books are available in paper from dealers. As well, HTML and PDF formats updated up to the latest version of the Monthly Notices to Mariners can be viewed online. The PDF format is also available for free download. Chile The Chilean official list of lighthouses is the ''Lista de Faros de la costa de Chile, Costa Oriental de Tierra del Fuego y Territorio Antártico'' published (as Nr. 3007) by the Hydrographic and Oceanograph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tide
Tides are the rise and fall of sea levels caused by the combined effects of the gravity, gravitational forces exerted by the Moon (and to a much lesser extent, the Sun) and are also caused by the Earth and Moon orbiting one another. Tide tables can be used for any given locale to find the predicted times and amplitude (or "tidal range"). The predictions are influenced by many factors including the alignment of the Sun and Moon, the #Phase and amplitude, phase and amplitude of the tide (pattern of tides in the deep ocean), the amphidromic systems of the oceans, and the shape of the coastline and near-shore bathymetry (see ''#Timing, Timing''). They are however only predictions, the actual time and height of the tide is affected by wind and atmospheric pressure. Many shorelines experience semi-diurnal tides—two nearly equal high and low tides each day. Other locations have a diurnal cycle, diurnal tide—one high and low tide each day. A "mixed tide"—two uneven magnitude ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whale Oil
Whale oil is oil obtained from the blubber of whales. Whale oil from the bowhead whale was sometimes known as train oil, which comes from the Dutch word ''traan'' ("tears, tear" or "drop"). Sperm oil, a special kind of oil obtained from the head cavities of sperm whales, differs chemically from ordinary whale oil: it is composed mostly of liquid wax. Its properties and applications differ from those of regular whale oil, and it was sold for a higher price. Source and use Emerging industrial societies used whale oil in oil lamps and to Soap#History, make soap. In the 20th century it was made into margarine. With the commercial development of the petroleum industry and vegetable oils, the use of whale oils declined considerably from its peak in the 19th century into the 20th century. This is said to have saved whales from extinction. In the 21st century, with most countries having banned whaling, the sale and use of whale oil has practically ceased. Whale oil was obtained by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Register Of Historic Places Listings In Essex County, Massachusetts
This list is of that portion of the National Register of Historic Places (NRHP) designated in Essex County, Massachusetts. The locations of these properties and districts for which the latitude and longitude coordinates are included below, may be seen in a map. There are more than 450 designated properties in the county, including 26 that are further designated as National Historic Landmarks. The municipalities of Andover, Gloucester, Ipswich, Lawrence, Lynn, Methuen, and Salem are to be found on a separate list(s) of the more than 200 identified here, except two properties are split between Methuen and Lawrence, and one between Lynn and Nahant; these entries appear on more than one list. __NOTOC__ Cities and towns listed separately Due to the number of listings in the county, some cities and towns have their sites listed separately. Current listings in other cities and towns ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lighthouses Completed In 1835
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 Completed In 1895
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 Massachusetts
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] |
