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Christopher Johnston (1822-1891)
Christopher Johnston (September 27, 1822–October 12, 1891) was an American surgeon and professor of anatomy. Among his contributions was the anatomical description of the antenna of mosquitoes and an organ that detects vibration that is now known as Johnston's organ. His son Christopher Johnston (1856–1914) became an eminent Assyriologist. Life and work Johnston was born in was born in Baltimore to Christopher and Elizabeth Gates, daughter of Maj. Lemuel Gates. His paternal grandfather had moved from Scotland to Baltimore in 1766. When his father died in 1835, he was adopted by an aunt Mariah S. Johnston. He was educated at St. Mary's College in Baltimore and later studied medicine under Dr. John Buckler. He received an MD in 1844 from Maryland University. Along with Charles Frick, David Stewart and Elisha W. Theobald he was involved in founding the Maryland Medical Institute in 1847. He travelled to Europe in 1853 and worked in hospitals in Paris and Vienna and on his retur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christopher Johnston
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Christopher Johnston may refer to: *Christopher Johnston (Assyriologist) (1856–1914), American physician and Assyriologist, a scholar of ancient Mesopotamia *Chris Clavin (Christopher Johnston, born 1979), musician and record label owner *Chris Johnston (footballer) (born 1994), Scottish footballer * Christopher Johnston, Lord Sands (1857–1934), judge and Unionist Party (Scotland) Member of Parliament See also *Chris Johnson (other) Chris Johnson may refer to: Entertainment *Chris J. Johnson (born 1977), American actor *Chris Johnson (presenter) (born 1991), BBC television presenter *Christopher Johnson, fictional alien refugee from the film ''District 9'' Sports American fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johnston's Organ
Johnston's organ is a collection of sensory cells found in the pedicel (the second segment) of the antennae in the class Insecta. Johnston's organ detects motion in the flagellum (third and typically final antennal segment). It consists of scolopidia arrayed in a bowl shape, each of which contains a mechanosensory chordotonal neuron. The number of scolopidia varies between species. In homopterans, the Johnston's organs contain 25 - 79 scolopidia. The presence of Johnston's organ is a defining characteristic which separates the class Insecta from the other hexapods belonging to the group Entognatha. Johnston's organ was named after the physician Christopher Johnston, father of the physician and Assyriologist Christopher Johnston. Uses of the Johnston's organ In fruit flies, nonbiting midges and mosquitoes In the fruit fly ''Drosophila melanogaster and Chironomus annularius'', the Johnston's organ contains almost 480 sensory neurons. In the mosquito, the Johnston's organ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christopher Johnston (Assyriologist)
Christopher Johnston (December 8, 1856 – June 26, 1914) was an American physician and Assyriologist, a scholar of ancient Mesopotamia. Personal life He was born on December 8, 1856, in Baltimore, the son of the physician Christopher Johnston (1822-1891), a professor of surgery at the University of Maryland and the discoverer of Johnston's organ, and Sarah Lucretia Clay (1835-1879). Johnston married Madeline T. Tilghman on June 2, 1897, and had a son, Benamin Johnston, and a daughter, Eliza Gates Johnston, who died young. Johnston died at his home in Baltimore on June 26, 1914. Studies and career Johnston studied at the University of Virginia, where he earned three degrees: a B. Litt. in 1876, a B.A. 1878, and an M.A. in 1879. He graduated from the medical department of the University of Maryland in 1880, practiced medicine until 1888 in Baltimore (while concurrently studying various languages), then entered Johns Hopkins to study Assyriology and Semitics, taking the degree o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johnstons Organ
The Johnstons were an Irish close-harmony folk band, founded in Slane, County Meath, Ireland, consisting of siblings Adrienne, Luci and Michael Johnston. Career The Johnstons began performing in the early 1960s in Slane. They signed to Pye Records in 1965 and recorded Ewan MacColl's "The Travelling People", a major hit for them. They added Mick Moloney, who was then becoming a major figure in the Irish music scene, and Paul Brady, while Michael Johnston departed. They continued recording to great success in Ireland, then signed to Transatlantic Records in London, releasing a United Kingdom album called ''The Johnstons'' in 1968. This was followed by two albums released on the same day, the traditional ''The Barleycorn'' and more contemporary ''Give a Damn''. When the Johnstons moved to London to further their career, Luci Johnston resigned and stayed in Dublin, leaving Adrienne as the only original Johnston in the group. After moving to London, the Johnstons toured and appeared ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baltimore
Baltimore ( , locally: or ) is the List of municipalities in Maryland, most populous city in the U.S. state of Maryland, fourth most populous city in the Mid-Atlantic (United States), Mid-Atlantic, and List of United States cities by population, the 30th most populous city in the United States with a population of 585,708 in 2020. Baltimore was designated an Independent city (United States), independent city by the Constitution of Maryland in 1851, and today is the most populous independent city in the United States. As of 2021, the population of the Baltimore metropolitan area was estimated to be 2,838,327, making it the List of metropolitan areas of the United States, 20th largest metropolitan area in the country. Baltimore is located about north northeast of Washington, D.C., making it a principal city in the Washington–Baltimore combined statistical area, Washington–Baltimore combined statistical area (CSA), the third-largest combined statistical area, CSA in the nat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Maryland, College Park
The University of Maryland, College Park (University of Maryland, UMD, or simply Maryland) is a public land-grant research university in College Park, Maryland. Founded in 1856, UMD is the flagship institution of the University System of Maryland. It is also the largest university in both the state and the Washington metropolitan area, with more than 41,000 students representing all fifty states and 123 countries, and a global alumni network of over 388,000. Together, its 12 schools and colleges offer over 200 degree-granting programs, including 92 undergraduate majors, 107 master's programs, and 83 doctoral programs. UMD is a member of the Association of American Universities and competes in intercollegiate athletics as a member of the Big Ten Conference. The University of Maryland's proximity to the nation's capital has resulted in many research partnerships with the federal government; faculty receive research funding and institutional support from many agencies, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Frick
Charles Frick (8 August 1823 in Baltimore, Maryland – 25 March 1860 in Baltimore, Maryland) was a Baltimore physician. Biography He studied at Baltimore College, and became a civil engineer. In 1843 he began the study of medicine, and graduated at the University of Maryland School of Medicine in 1845. He early gave his attention to auscultation Auscultation (based on the Latin verb ''auscultare'' "to listen") is listening to the internal sounds of the body, usually using a stethoscope. Auscultation is performed for the purposes of examining the circulatory and respiratory systems (hea ..., which was first introduced into Baltimore by his brother-in-law. In 1847, with three others, he organized the Maryland Medical Institute, a preparatory school of medicine, and took in it the department of practical medicine. From 1849 to 1856, Frick was attending physician to the Maryland Penitentiary. In 1855 and 1856, he took a conspicuous part in the Baltimore Pathological Society. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nathan Ryno Smith
Nathan Ryno Smith (May 21, 1797 – July 3, 1877) was an American surgeon and medical school professor. Smith was born in Cornish, New Hampshire. He was the son of Sarah Hall Chase and Nathan Smith. Like his father Smith went into the medical profession, but he went to Yale instead of Harvard, receiving his MD in 1820. Smith had received his bachelor's degree in 1817, and had worked as a tutor for a family in Fauquier County, Virginia for a time before taking up medical studies. Smith set up a medical practice at Burlington, Vermont Burlington is the most populous city in the U.S. state of Vermont and the seat of Chittenden County. It is located south of the Canada–United States border and south of Montreal. As of the 2020 U.S. census, the population was 44,743. It ... in 1824 and the following year was appointed a professor of surgery at the University of Vermont. After this Smith moved to Philadelphia where he was involved in the founding of Jefferson Medica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Culex
''Culex'' is a genus of mosquitoes, several species of which serve as vectors of one or more important diseases of birds, humans, and other animals. The diseases they vector include arbovirus infections such as West Nile virus, Japanese encephalitis, or St. Louis encephalitis, but also filariasis and avian malaria. They occur worldwide except for the extreme northern parts of the temperate zone, and are the most common form of mosquito encountered in some major U.S. cities, such as Los Angeles. Etymology In naming this genus, Carl Linnaeus appropriated the nonspecific Latin term for a midge or gnat: '. Description Depending on the species, the adult ''Culex'' mosquito may measure from . The adult morphology is typical of flies in the suborder Nematocera with the head, thorax, and abdomen clearly defined and the two forewings held horizontally over the abdomen when at rest. As in all Diptera capable of flight, the second pair of wings is reduced and modified into tiny, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astrodon
''Astrodon'' (aster: star, odon: tooth) is a genus of large herbivorous sauropod dinosaur, measuring in length, in height and in body mass. It lived in what is now the eastern United States during the Early Cretaceous period, and fossils have been found in the Arundel Formation, which has been dated through palynomorphs to the Albian about 112 to 110 million years ago. Discovery and species Two dinosaur teeth were received in late November 1858 by chemist Philip Thomas Tyson from John D. Latchford. They had been found in Latchford's open iron ore pit in the Arundel Formation at Swampoodle near Muirkirk in Prince George's County, Maryland. Tyson let them be studied by the dentist Christopher Johnston, professor at the Baltimore Dental College, who cut one tooth in half and thereby discovered a characteristic star-formed cross-section. Johnston named ''Astrodon'' in 1859. However, he did not attach a specific epithet, so Joseph Leidy is credited with naming ''Astrodon johnsto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joseph Leidy
Joseph Mellick Leidy (September 9, 1823 – April 30, 1891) was an American paleontologist, parasitologist and anatomist. Leidy was professor of anatomy at the University of Pennsylvania, later was a professor of natural history at Swarthmore College and the director of scientific and educational programs at the Wagner Free Institute of Science. His book ''Extinct Fauna of Dakota and Nebraska'' (1869) contained many species not previously described and many previously unknown on the North American continent. At the time, scientific investigation was largely the province of wealthy amateurs. The Leidy Glacier in northwest Greenland was named by Robert Peary after him. Early life and family Joseph Leidy was born on September 9, 1823, to an established Philadelphia family of Pennsylvania Germans. His father, Philip, was a hatter; his mother, Catharine, died during childbirth when he was young. His father then married his wife's first cousin, Christiana Mellick. Leidy also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1822 Births
Eighteen or 18 may refer to: * 18 (number), the natural number following 17 and preceding 19 * one of the years 18 BC, AD 18, 1918, 2018 Film, television and entertainment * ''18'' (film), a 1993 Taiwanese experimental film based on the short story ''God's Dice'' * ''Eighteen'' (film), a 2005 Canadian dramatic feature film * 18 (British Board of Film Classification), a film rating in the United Kingdom, also used in Ireland by the Irish Film Classification Office * 18 (''Dragon Ball''), a character in the ''Dragon Ball'' franchise * "Eighteen", a 2006 episode of the animated television series '' 12 oz. Mouse'' Music Albums * ''18'' (Moby album), 2002 * ''18'' (Nana Kitade album), 2005 * '' 18...'', 2009 debut album by G.E.M. Songs * "18" (5 Seconds of Summer song), from their 2014 eponymous debut album * "18" (One Direction song), from their 2014 studio album ''Four'' * "18", by Anarbor from their 2013 studio album ''Burnout'' * "I'm Eighteen", by Alice Cooper commo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
