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Henry Augustus Rowland
Henry Augustus Rowland (November 27, 1848 – April 16, 1901) was an American physicist and Johns Hopkins educator. Between 1899 and 1901 he served as the first president of the American Physical Society. He is remembered primarily for the high quality of the diffraction gratings he made and for the work he did with them on the solar spectrum. Early life, family and education Rowland was born in Honesdale, Pennsylvania, where his father Henry Augustus Rowland was a Presbyterian pastor. From an early age, the younger Rowland exhibited marked scientific tastes and spent his spare time in electrical and chemical experiments. He graduated from Rensselaer Polytechnic Institute in Troy, New York in 1870. Career After college, Rowland worked for the Western New York railway, but he did not like the work. He became an instructor in natural science at the University of Wooster in Wooster, Ohio. He resigned in order to return to Troy as assistant professor of physics at Rensselaer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Honesdale, Pennsylvania
Honesdale is a borough in and the county seat of Wayne County, Pennsylvania, United States. The borough's population was 4,458 at the time of the 2020 census. Honesdale is located northeast of Scranton in a rural area that provides many recreational opportunities, such as boating, fishing, hiking, hunting, skiing, biking, skateboarding, and rafting. Located in a coal mining region, during the nineteenth century it was the starting point of the Delaware and Hudson Canal, which provided for transport of coal to Kingston, New York, and then down the Hudson River to New York City. In the 19th century, the expansion of railroads eventually superseded regular use of the canal. History The discovery of anthracite coal in northeastern Pennsylvania in the early 1800s and the need to transport this valuable fuel to New York City gave birth to the Delaware and Hudson Canal, the American Railroad, and the Borough of Honesdale. Honesdale was named for Philip Hone, former Mayor of New York ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry Draper Medal
The Henry Draper Medal is awarded every 4 years by the United States National Academy of Sciences "for investigations in astrophysics, astronomical physics". Named after Henry Draper, the medal is awarded with a gift of USD $15,000. The medal was established under the Draper Fund by his widow, Anna Draper, in honor of her husband, and was first awarded in 1886 to Samuel Pierpont Langley "for numerous investigations of a high order of merit in solar physics, and especially in the domain of radiant energy". It has since been awarded 45 times. The medal has been awarded to multiple individuals in the same year: in 1977 it was awarded to Arno Allan Penzias and Robert Woodrow Wilson "for their discovery of the Cosmic microwave background, cosmic microwave radiation (a remnant of the very early universe), and their leading role in the discovery of interstellar molecules"; in 1989 to Riccardo Giovanelli and Martha P. Haynes "for the first three-dimensional view of some of the remarkable l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Journal Of Science
The ''American Journal of Science'' (''AJS'') is the United States of America's longest-running scientific journal, having been published continuously since its conception in 1818 by Professor Benjamin Silliman, who edited and financed it himself. Until 1880, it was also known as the ''American Journal of Science and Arts'', but its focus was always on natural sciences and especially on geology and related subjects. In early years, the journal was often referred to as "Silliman's Journal", and the publication became associated with Yale University due to his long tenure there (1804–1853). The editorship long remained in the family of Professor Silliman, as he was assisted by his son, Benjamin Silliman Jr., from 1838. On the death of the elder Silliman in 1864, he was succeeded as chief editor by his son-in-law, James Dwight Dana, and then from 1895 till 1926 by Dana's son Edward Salisbury Dana. Associate editors included the botanist Asa Gray and the zoologist Louis Agassiz. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Baltimore Sun
''The Baltimore Sun'' is the largest general-circulation daily newspaper based in the U.S. state of Maryland and provides coverage of local and regional news, events, issues, people, and industries. Founded in 1837, it is currently owned by Tribune Publishing. The ''Baltimore Sun's'' parent company, '' Tribune Publishing'', was acquired by Alden Global Capital, which operates its media properties through Digital First Media, in May 2021. History ''The Sun'' was founded on May 17, 1837, by printer/editor/publisher/owner Arunah Shepherdson Abell (often listed as "A. S. Abell") and two associates, William Moseley Swain, and Azariah H. Simmons, recently from Philadelphia, where they had started and published the '' Public Ledger'' the year before. Abell was born in Rhode Island, became a journalist with the ''Providence Patriot'' and later worked with newspapers in New York City and Boston.Van Doren, Charles and Robert McKendry, ed., ''Webster's American Biographies''. (Springfiel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philosophical Magazine
The ''Philosophical Magazine'' is one of the oldest scientific journals published in English. It was established by Alexander Tilloch in 1798;John Burnett"Tilloch, Alexander (1759–1825)" Oxford Dictionary of National Biography, Oxford University Press, Sept 2004; online edn, May 2006, accessed 17 Feb 2010 in 1822 Richard Taylor became joint editor and it has been published continuously by Taylor & Francis ever since. Early history The name of the journal dates from a period when "natural philosophy" embraced all aspects of science. The very first paper published in the journal carried the title "Account of Mr Cartwright's Patent Steam Engine". Other articles in the first volume include "Methods of discovering whether Wine has been adulterated with any Metals prejudicial to Health" and "Description of the Apparatus used by Lavoisier to produce Water from its component Parts, Oxygen and Hydrogen". 19th century Early in the nineteenth century, classic papers by Humphry Davy, M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Clerk Maxwell
James Clerk Maxwell (13 June 1831 – 5 November 1879) was a Scottish mathematician and scientist responsible for the classical theory of electromagnetic radiation, which was the first theory to describe electricity, magnetism and light as different manifestations of the same phenomenon. Maxwell's equations for electromagnetism have been called the " second great unification in physics" where the first one had been realised by Isaac Newton. With the publication of "A Dynamical Theory of the Electromagnetic Field" in 1865, Maxwell demonstrated that electric and magnetic fields travel through space as waves moving at the speed of light. He proposed that light is an undulation in the same medium that is the cause of electric and magnetic phenomena. (This article accompanied an 8 December 1864 presentation by Maxwell to the Royal Society. His statement that "light and magnetism are affections of the same substance" is at page 499.) The unification of light and electrical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wooster, Ohio
Wooster ( ) is a city in the U.S. state of Ohio and the county seat of Wayne County. Located in northeastern Ohio, the city lies approximately south-southwest of Cleveland, southwest of Akron and west of Canton. The population was 27,232 at the 2020 census. The city is the largest in Wayne County, and the center of the Wooster micropolitan area (as defined by the United States Census Bureau). Wooster has the main branch and administrative offices of the Wayne County Public Library, and is home to the private College of Wooster. ''fDi magazine'' ranked Wooster among North America's top 10 micro cities for business friendliness and strategy in 2013. History Wooster was established in 1808 by John Bever, William Henry, and Joseph Larwill and named after David Wooster, a general in the American Revolutionary War. Geography According to the United States Census Bureau, the city has a total area of , of which, is land and is water. Geology The local bedrock consists of the Cuy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Troy, New York
Troy is a city in the U.S. state of New York and the county seat of Rensselaer County. The city is located on the western edge of Rensselaer County and on the eastern bank of the Hudson River. Troy has close ties to the nearby cities of Albany and Schenectady, forming a region popularly called the Capital District. The city is one of the three major centers for the Albany metropolitan statistical area, which has a population of 1,170,483. At the 2020 census, the population of Troy was 51,401. Troy's motto is ''Ilium fuit, Troja est'', which means "Ilium was, Troy is". Today, Troy is home to Rensselaer Polytechnic Institute, the oldest private engineering and technical university in the US, founded in 1824. It is also home to Emma Willard School, an all-girls high school started by Emma Willard, a women's education activist, who sought to create a school for girls equal to their male counterparts. Due to the confluence of major waterways and a geography that supported water power ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Presbyterian
Presbyterianism is a part of the Reformed tradition within Protestantism that broke from the Roman Catholic Church in Scotland by John Knox, who was a priest at St. Giles Cathedral (Church of Scotland). Presbyterian churches derive their name from the presbyterian polity, presbyterian form of ecclesiastical polity, church government by representative assemblies of Presbyterian elder, elders. Many Reformed churches are organised this way, but the word ''Presbyterian'', when capitalized, is often applied to churches that trace their roots to the Church of Scotland or to English Dissenters, English Dissenter groups that formed during the English Civil War. Presbyterian theology typically emphasizes the sovereignty of God, the Sola scriptura, authority of the Scriptures, and the necessity of Grace in Christianity, grace through Faith in Christianity, faith in Christ. Presbyterian church government was ensured in Scotland by the Acts of Union 1707, Acts of Union in 1707, which cre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry Augustus Rowland (minister)
Henry Augustus Rowland (September 18, 1804September 4, 1859) was an American minister. He was the son of Rev. Henry A. Rowland of Windsor, Connecticut, and was born in that town September 18, 1804. He graduated from Yale University in 1823. After the completion of a course of theological studies at Andover Theological Seminary in 1827 he was ordained to the ministry, and spent a year at the South as an agent of the American Bible Society. In 1833, he was settled as Pastor of the Presbyterian Church at Fayetteville, North Carolina, from which place he removed after several years, to take charge of the Pearl Street Presbyterian Church, in New York City. From New York he was called to Honesdale, Pennsylvania, where he labored as Pastor ten years. About 1855, he left that place, and became the Pastor of the Park Presbyterian Church in Newark, New Jersey, which station he occupied at the time of his death. Six months previous to this event, his health gave way, and while travelling f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rowland Dividing Engine
Rowland may refer to: Places ;in the United States *Rowland Heights, California, an unincorporated community in Los Angeles County *Rowland, Kentucky, an unincorporated community * Rowland Township, Michigan * Rowland, Missouri, an unincorporated community * Rowland Township, North Carolina **Rowland, North Carolina, a town * Rowland, Nevada, a ghost town *Rowland, Oregon, a ghost town ;Elsewhere *Rowland, Derbyshire, England, a village and civil parish *Rowland (crater), on the Moon People *Rowland (given name), people so named *Rowland (surname), people so named Other *The title character of Childe Rowland, a fairy tale by Joseph Jacobs, based on a Scottish ballad *Rowland Institute for Science, now part of Harvard University *Rowland Theater, Pittsburgh, Pennsylvania, United States See also *Roland (other) *Rowlands *Rowlan Rowlan ( ) is an Ireland, Irish Surname and the anglicized version of the name Ó Rothlain . It, therefore, shares a link with the surnames Ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diffraction Grating
In optics, a diffraction grating is an optical component with a periodic structure that diffracts light into several beams travelling in different directions (i.e., different diffraction angles). The emerging coloration is a form of structural coloration. The directions or diffraction angles of these beams depend on the wave (light) incident angle to the diffraction grating, the spacing or distance between adjacent diffracting elements (e.g., parallel slits for a transmission grating) on the grating, and the wavelength of the incident light. The grating acts as a dispersive element. Because of this, diffraction gratings are commonly used in monochromators and spectrometers, but other applications are also possible such as optical encoders for high precision motion control and wavefront measurement. For typical applications, a reflective grating has ridges or ''rulings'' on its surface while a transmissive grating has transmissive or hollow slits on its surface. Such a grating ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
