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Edward Samuel Ritchie
Edward Samuel Ritchie (1814–1895), an American inventor and physicist, is considered to be the most innovative instrument maker in nineteenth-century America, making important contributions to both science and navigation. Early life and career Ritchie was born in Dorchester, Massachusetts on August 18, 1814, the son of John and Elizabeth Eliot Ritchie. As a young child Ritchie displayed a great aptitude for both the arts and mechanical sciences. After working as an amateur sculptor, he founded a business in 1850 with N.B. Chamberlain to manufacture mechanical and electrical instruments. Chamberlain eventually left, and Ritchie continued the business alone. Inventions and Innovations In the early 1850s, after examining an example of an electric induction coil made by German instrument maker Heinrich Daniel Ruhmkorff, which produced a small two-inch (50 mm) electric spark when energized, Ritchie perceived that it could be made more efficient and produce a longer spark by r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorchester, Massachusetts
Dorchester (colloquially referred to as Dot) is a Boston neighborhood comprising more than in the City of Boston, Massachusetts, United States. Originally, Dorchester was a separate town, founded by Puritans who emigrated in 1630 from Dorchester, Dorset, England, to the Massachusetts Bay Colony. This dissolved municipality, Boston's largest neighborhood by far, is often divided by city planners in order to create two planning areas roughly equivalent in size and population to other Boston neighborhoods. The neighborhood is named after the town of Dorchester in the English county of Dorset, from which Puritans emigrated on the ship ''Mary and John'', among others. Founded in 1630, just a few months before the founding of the city of Boston, Dorchester now covers a geographic area approximately equivalent to nearby Cambridge.History ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ship Motions
Ship motions are defined by the six degrees of freedom that a ship, boat or any other craft can experience. Reference axes The '' vertical/Z axis'', or ''yaw axis'', is an imaginary line running vertically through the ship and through its centre of mass . A yaw motion is a side-to side movement of the bow and stern of the ship. The '' transverse/Y axis'', ''lateral axis'', or ''pitch axis'' is an imaginary line running horizontally across the ship and through the centre of mass. A pitch motion is an up-or-down movement of the bow and stern of the ship. The '' longitudinal/X axis'', or ''roll axis'', is an imaginary line running horizontally through the length of the ship, through its centre of mass, and parallel to the ''waterline''. A roll motion is a side-to-side or port-starboard tilting motion of the superstructure around this axis. Rotational There are three special axes in any ship, called longitudinal, transverse and vertical axes. The movements around them a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People From Boston
A person ( : people) is a being that has certain capacities or attributes such as reason, morality, consciousness or self-consciousness, and being a part of a culturally established form of social relations such as kinship, ownership of property, or legal responsibility. The defining features of personhood and, consequently, what makes a person count as a person, differ widely among cultures and contexts. In addition to the question of personhood, of what makes a being count as a person to begin with, there are further questions about personal identity and self: both about what makes any particular person that particular person instead of another, and about what makes a person at one time the same person as they were or will be at another time despite any intervening changes. The plural form "people" is often used to refer to an entire nation or ethnic group (as in "a people"), and this was the original meaning of the word; it subsequently acquired its use as a plural form of per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Scientific Instrument Makers
American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry, people who self-identify their ancestry as "American" ** American English, the set of varieties of the English language native to the United States ** Native Americans in the United States, indigenous peoples of the United States * American, something of, from, or related to the Americas, also known as "America" ** Indigenous peoples of the Americas * American (word), for analysis and history of the meanings in various contexts Organizations * American Airlines, U.S.-based airline headquartered in Fort Worth, Texas * American Athletic Conference, an American college athletic conference * American Recordings (record label), a record label previously known as Def American * American University, in Washington, D.C. Sports teams Soccer * Ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Physicists
American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry, people who self-identify their ancestry as "American" ** American English, the set of varieties of the English language native to the United States ** Native Americans in the United States, indigenous peoples of the United States * American, something of, from, or related to the Americas, also known as "America" ** Indigenous peoples of the Americas * American (word), for analysis and history of the meanings in various contexts Organizations * American Airlines, U.S.-based airline headquartered in Fort Worth, Texas * American Athletic Conference, an American college athletic conference * American Recordings (record label), a record label previously known as Def American * American University, in Washington, D.C. Sports teams Soccer * B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
19th-century American Inventors
The 19th (nineteenth) century began on 1 January 1801 ( MDCCCI), and ended on 31 December 1900 ( MCM). The 19th century was the ninth century of the 2nd millennium. The 19th century was characterized by vast social upheaval. Slavery was abolished in much of Europe and the Americas. The First Industrial Revolution, though it began in the late 18th century, expanding beyond its British homeland for the first time during this century, particularly remaking the economies and societies of the Low Countries, the Rhineland, Northern Italy, and the Northeastern United States. A few decades later, the Second Industrial Revolution led to ever more massive urbanization and much higher levels of productivity, profit, and prosperity, a pattern that continued into the 20th century. The Islamic gunpowder empires fell into decline and European imperialism brought much of South Asia, Southeast Asia, and almost all of Africa under colonial rule. It was also marked by the collapse of the large S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctica
Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest continent, being about 40% larger than Europe, and has an area of . Most of Antarctica is covered by the Antarctic ice sheet, with an average thickness of . Antarctica is, on average, the coldest, driest, and windiest of the continents, and it has the highest average elevation. It is mainly a polar desert, with annual precipitation of over along the coast and far less inland. About 70% of the world's freshwater reserves are frozen in Antarctica, which, if melted, would raise global sea levels by almost . Antarctica holds the record for the lowest measured temperature on Earth, . The coastal regions can reach temperatures over in summer. Native species of animals include mites, nematodes, penguins, seals and tardigrades. Where vegetation o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ritchie Rock
Ritchie Rock ( bg, скала Ричи, skala Ritchie, ) is the conspicuous rock off the southwest coast of Snow Island in the South Shetland Islands, Antarctica extending 80 m in south–north direction and 73 m in west–east direction, with a surface area of 0.17 ha. The vicinity was visited by early 19th century sealers.L. IvanovGeneral Geography and History of Livingston Island.In: ''Bulgarian Antarctic Research: A Synthesis''. Eds. C. Pimpirev and N. Chipev. Sofia: St. Kliment Ohridski University Press, 2015. pp. 17–28 The feature is named after Edward Samuel Ritchie (1814–1895), an American inventor and physicist who created a waterborne version of the theodolite used in harbour surveys; in association with other names in the area deriving from the early development or use of geodetic instruments and methods. Location Ritchie Rock is located at , [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Science Museum (London)
The Science Museum is a major museum on Exhibition Road in South Kensington, London. It was founded in 1857 and is one of the city's major tourist attractions, attracting 3.3 million visitors annually in 2019. Like other publicly funded national museums in the United Kingdom, the Science Museum does not charge visitors for admission, although visitors are requested to make a donation if they are able. Temporary exhibitions may incur an admission fee. It is one of the five museums in the Science Museum Group. Founding and history The museum was founded in 1857 under Bennet Woodcroft from the collection of the Royal Society of Arts and surplus items from the Great Exhibition as part of the South Kensington Museum, together with what is now the Victoria and Albert Museum. It included a collection of machinery which became the ''Museum of Patents'' in 1858, and the ''Patent Office Museum'' in 1863. This collection contained many of the most famous exhibits of what is now t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brookline, Massachusetts
Brookline is a town in Norfolk County, Massachusetts, Norfolk County, Massachusetts, in the United States, and part of the Greater Boston, Boston metropolitan area. Brookline borders six of Boston's neighborhoods: Brighton, Boston, Brighton, Allston, Fenway–Kenmore, Mission Hill, Boston, Mission Hill, Jamaica Plain, and West Roxbury. The city of Newton, Massachusetts, Newton lies to the west of Brookline. Brookline was first settled in 1638 as a Hamlet (place), hamlet in Boston, known as Muddy River; it was incorporated as a separate town in 1705. At the time of the 2020 United States Census, the population of the town was 63,191. It is the most populous municipality in Massachusetts to have a New England town, town (rather than city) form of government. History Once part of Algonquian peoples, Algonquian territory, Brookline was first settled by White people, European colonists in the early 17th century. The area was an outlying part of the colonial settlement of Boston a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ritchie Building
The Ritchie Building is a historic industrial building at 112 Cypress Street in Brookline, Massachusetts. Built in 1883 by Edward Samuel Ritchie, it is a fine example of the Panel Brick style, and is further notable as the factory space in which Ritchie manufactured a nationally distributed line of navigational instruments. The building was listed on the National Register of Historic Places in 1985. Description and history The Ritchie Building is located on the east side of Cypress Street, north of Massachusetts Route 9 and south of the MBTA Green Line D branch, just east of the Brookline Hills station. It is a four-story rectangular brick structure, with a hip roof. The first floor is below the street level, which was raised in order to bridge the railroad tracks, and the main entrance is now on the second level. The second level is finished in stone, resembling a raised basement level, while the upper floors retain their original modest Panel Brick features, including segme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theodolite
A theodolite () is a precision optical instrument for measuring angles between designated visible points in the horizontal and vertical planes. The traditional use has been for land surveying, but it is also used extensively for building and infrastructure construction, and some specialized applications such as meteorology and rocket launching. It consists of a moveable telescope mounted so it can rotate around horizontal and vertical axes and provide angular readouts. These indicate the orientation of the telescope, and are used to relate the first point sighted through the telescope to subsequent sightings of other points from the same theodolite position. These angles can be measured with accuracies down to microradians or seconds of arc. From these readings a plan can be drawn, or objects can be positioned in accordance with an existing plan. The modern theodolite has evolved into what is known as a total station where angles and distances are measured electronically, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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