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Robert Barker (physician)
Robert Barker (died 1745) was a British physician and inventor. He was a Fellow of the Royal Society from 1732. Barker invented both a reflecting microscope, exhibited in 1736, and "Barker's mill", a prototype reaction turbine (1743). According to James Dodson, he was a friend of Charles Labelye. He died in London, on 9 September 1745. Barker's Mill Barker's Mill, a rotating device powered by water and Newton's Third Law, is sometimes described as a 17th century invention. It is attributed to Dr Robert Barker F.R.S., in 1743. It was published by John Theophilus Desaguliers in his book ''Experimental Philosophy'' of 1744. Desaguliers, who himself demonstrated the mill to the Royal Society, attributed the principle involved to Antoine Parent. French terms for the mill are ''tourniquet hydraulique'', ''moulin de Parent'' or ''roue à réaction''. A complex timeline of development ensued. *As the Segner wheel, practical application of the idea is often credited to Johann Andreas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Barker MET DP-1424-047
The name Robert is an ancient Germanic given name, from Proto-Germanic "fame" and "bright" (''Hrōþiberhtaz''). Compare Old Dutch ''Robrecht'' and Old High German ''Hrodebert'' (a compound of '' Hruod'' ( non, Hróðr) "fame, glory, honour, praise, renown" and ''berht'' "bright, light, shining"). It is the second most frequently used given name of ancient Germanic origin. It is also in use as a surname. Another commonly used form of the name is Rupert. After becoming widely used in Continental Europe it entered England in its Old French form ''Robert'', where an Old English cognate form (''Hrēodbēorht'', ''Hrodberht'', ''Hrēodbēorð'', ''Hrœdbœrð'', ''Hrœdberð'', ''Hrōðberχtŕ'') had existed before the Norman Conquest. The feminine version is Roberta. The Italian, Portuguese, and Spanish form is Roberto. Robert is also a common name in many Germanic languages, including English, German, Dutch, Norwegian, Swedish, Scots, Danish, and Icelandic. It can be u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leonhard Euler
Leonhard Euler ( , ; 15 April 170718 September 1783) was a Swiss mathematician, physicist, astronomer, geographer, logician and engineer who founded the studies of graph theory and topology and made pioneering and influential discoveries in many other branches of mathematics such as analytic number theory, complex analysis, and infinitesimal calculus. He introduced much of modern mathematical terminology and notation, including the notion of a mathematical function. He is also known for his work in mechanics, fluid dynamics, optics, astronomy and music theory. Euler is held to be one of the greatest mathematicians in history and the greatest of the 18th century. A statement attributed to Pierre-Simon Laplace expresses Euler's influence on mathematics: "Read Euler, read Euler, he is the master of us all." Carl Friedrich Gauss remarked: "The study of Euler's works will remain the best school for the different fields of mathematics, and nothing else can replace it." Euler is a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
18th-century British Medical Doctors
The 18th century lasted from January 1, 1701 ( MDCCI) to December 31, 1800 ( MDCCC). During the 18th century, elements of Enlightenment thinking culminated in the American, French, and Haitian Revolutions. During the century, slave trading and human trafficking expanded across the shores of the Atlantic, while declining in Russia, China, and Korea. Revolutions began to challenge the legitimacy of monarchical and aristocratic power structures, including the structures and beliefs that supported slavery. The Industrial Revolution began during mid-century, leading to radical changes in human society and the environment. Western historians have occasionally defined the 18th century otherwise for the purposes of their work. For example, the "short" 18th century may be defined as 1715–1789, denoting the period of time between the death of Louis XIV of France and the start of the French Revolution, with an emphasis on directly interconnected events. To historians who expand t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1745 Deaths
Events January–March * January 7 – War of the Austrian Succession: The Austrian Army, under the command of Field Marshal Károly József Batthyány, makes a surprise attack at Amberg and the winter quarters of the Bavarian Army, and scatters the Bavarian defending troops, then captures the Bavarian capital at Munich * January 8 – The Quadruple Alliance treaty is signed at Warsaw by Great Britain, Austria, the Dutch Republic and the Duchy of Saxony. * January 20 – Less than two weeks after the disastrous Battle of Amberg leaves Bavaria undefended, the electorate's ruler (and Holy Roman Emperor) Karl VII Albrecht dies from gout at the age of 47, leaving the duchy without an adult to lead it. His 17-year-old son, Maximilian III Joseph, signs terms of surrender in April. * February 22 – The ruling white colonial government on the island of Jamaica foils a conspiracy by about 900 black slaves, who had been plotting to seize control and to mass ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Year Of Birth Missing
A year or annus is the orbital period of a planetary body, for example, the Earth, moving in its orbit around the Sun. Due to the Earth's axial tilt, the course of a year sees the passing of the seasons, marked by change in weather, the hours of daylight, and, consequently, vegetation and soil fertility. In temperate and subpolar regions around the planet, four seasons are generally recognized: spring, summer, autumn and winter. In tropical and subtropical regions, several geographical sectors do not present defined seasons; but in the seasonal tropics, the annual wet and dry seasons are recognized and tracked. A calendar year is an approximation of the number of days of the Earth's orbital period, as counted in a given calendar. The Gregorian calendar, or modern calendar, presents its calendar year to be either a common year of 365 days or a leap year of 366 days, as do the Julian calendars. For the Gregorian calendar, the average length of the calendar year (the mea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paisley, Renfrewshire
Paisley ( ; sco, Paisley, gd, Pàislig ) is a large town situated in the west central Lowlands of Scotland. Located north of the Gleniffer Braes, the town borders the city of Glasgow to the east, and straddles the banks of the White Cart Water, a tributary of the River Clyde. Paisley serves as the administrative centre for the Renfrewshire council area, and is the largest town in the historic county of the same name. It is often cited as "Scotland's largest town" and is the fifth largest settlement in the country, although it does not have city status. The town became prominent in the 12th century, with the establishment of Paisley Abbey, an important religious hub which formerly had control over other local churches. By the 19th century, Paisley was a centre of the weaving industry, giving its name to the Paisley shawl and the Paisley pattern. The town's associations with political radicalism were highlighted by its involvement in the Radical War of 1820, with striking ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benoît Fourneyron
Benoît Fourneyron (31 October 1802 – 31 July 1867) was a French engineer, born in Saint-Étienne, Loire. Fourneyron made significant contributions to the development of water turbines. Benoît Fourneyron was educated at the École Nationale Supérieure des Mines de Saint-Étienne, a nearby engineering school that had recently opened. After he graduated in 1816, he spent the next few years in mines and ironworks. Around this time, a number of French engineers—including some of Fourneyron's former teachers—were starting to apply the mathematical techniques of modern science to the ancient mechanism called the waterwheel. For centuries, waterwheels had been used to convert the energy of streams into mechanical power, mostly for milling grain. But the new machines of the Industrial Revolution required more power, and by the 1820s there was enormous interest in making waterwheels more efficient. Fourneyron-style turbines Using the proposal of a former teacher (Claude Bur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Turbine
A water turbine is a rotary machine that converts kinetic energy and potential energy of water into mechanical work. Water turbines were developed in the 19th century and were widely used for industrial power prior to electrical grids. Now, they are mostly used for electric power generation. Water turbines are mostly found in dams to generate electric power from water potential energy. History Water wheels have been used for hundreds of years for industrial power. Their main shortcoming is size, which limits the flow rate and head that can be harnessed. The migration from water wheels to modern turbines took about one hundred years. Development occurred during the Industrial revolution, using scientific principles and methods. They also made extensive use of new materials and manufacturing methods developed at the time. Swirl The word turbine was introduced by the French engineer Claude Burdin in the early 19th century and is derived from the Greek word "τύρβη" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Rumsey
James Rumsey (1743 – December 21, 1792) was an American mechanical engineer chiefly known for exhibiting a boat propelled by machinery in 1787 on the Potomac River at Shepherdstown in present-day West Virginia before a crowd of local notables, including Horatio Gates. A pump driven by steam power ejected a stream of water from the stern of the boat and thereby propelled the boat forward. Early life Little is known about Rumsey until he was living in Bath, Virginia, (now Berkeley Springs, West Virginia) in 1782. He likely had moved to the area with his family some years before the American Revolution, from Cecil County, Maryland, where he had helped to run the family water mill at Bohemia Manor. His cousin was Benjamin Rumsey, a notable Maryland jurist and statesman, who also grew up at Bohemia Manor. In Bath, he built houses, became a partner in a mercantile business, and helped to run a boarding house and tavern called the "Sign of the Liberty Pole and Flag." Early efforts ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Ferguson (Scottish Astronomer)
James Ferguson (25 April 1710 – 17 November 1776) was a Scottish astronomer. He is known as the inventor and improver of astronomical and other scientific apparatus, as a striking instance of self education and as an itinerant lecturer. Biography Ferguson was born near Rothiemay in Banffshire of humble parents. According to his autobiography, he learned to read by hearing his father teach his elder brother, and with the help of an old woman was able to read quite well before his father thought of teaching him. After his father taught him to write, he was sent at the age of seven for three months to the grammar school at Keith and that was all the formal education he ever received. His taste for mechanics was about this time accidentally awakened on seeing his father making use of a lever to raise a part of the roof of his house — an exhibition of strength which excited his wonder. In 1720 he was sent to a neighboring farm to keep sheep, where he amused himself b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euler Wheel
Leonhard Euler ( , ; 15 April 170718 September 1783) was a Swiss mathematician, physicist, astronomer, geographer, logician and engineer who founded the studies of graph theory and topology and made pioneering and influential discoveries in many other branches of mathematics such as analytic number theory, complex analysis, and infinitesimal calculus. He introduced much of modern mathematical terminology and notation, including the notion of a mathematical function. He is also known for his work in mechanics, fluid dynamics, optics, astronomy and music theory. Euler is held to be one of the greatest mathematicians in history and the greatest of the 18th century. A statement attributed to Pierre-Simon Laplace expresses Euler's influence on mathematics: "Read Euler, read Euler, he is the master of us all." Carl Friedrich Gauss remarked: "The study of Euler's works will remain the best school for the different fields of mathematics, and nothing else can replace it." ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Andreas Segner
Johann Andreas von Segner ( hu, János András Segner, german: Johann Andreas von Segner, sk, Ján Andrej Segner, la, Iohannes Andreas de Segner; October 9, 1704 – October 5, 1777) was a Kingdom of Hungary, Hungarian scientist. He was born in the Kingdom of Hungary, in the former Hungarian capital city of Pozsony (today Bratislava). Early life and education Johann Segner was born to Johann Michael von Segner and his wife Christine von Segner (née Fischer) on probably the 10 October 1704. Other sources mention also the 4 or the 9 October. His father was a tax clerk. His ancestors from the father die came from Styria to Pressburg in the History of Hungary 1700-1919, Kingdom of Hungary; by the 18th century. In 1596 the family was granted nobility for their military accomplishments by Rudolf II, Holy Roman Emperor, Rudolph II. He studied at Pressburg, Győr and Debrecen. In April 1725, Segner began studying at the University of Jena. Under the guidance of Georg Erhard Hamberge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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