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John Ross Callahan
John R. Callahan (1853 – February 12, 1918) was a pioneer in the field of dentistry and particularly dental research in the late 19th and early 20th centuries. Born in Hillsboro, Ohio in 1853, Callahan received his dental degree from the Philadelphia Dental College in 1877. He practiced dentistry in San Francisco for two years before returning to Hillsboro where he practiced until 1890. He then moved to Cincinnati, Ohio joining the practice of Dr. C. R. Taft. In 1884 he was selected Secretary of the Ohio State Dental Society and served until 1890. In 1892 he was elected President of the Society and was a member of the Board of Directors from 1894-1918. He served as President of the Cincinnati Dental Society 1906-1907. His major research was in diseases of the dental pulp. He also contributed papers on materials and methods for filling root canals; notably, chloro-percha. His original contribution of the use of sulfuric acid for opening root canals was significant at the time a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hillsboro, Ohio
Hillsboro is a city in and the county seat of Highland County, Ohio, United States approximately 35 mi (56 km) west of Chillicothe, and 50 miles east of Cincinnati. The population was 6,605 at the 2010 census. History Hillsboro was platted in 1807, and most likely named for the hills near the original town site. One of the late 19th century's largest reform organizations, the Woman's Christian Temperance Union that went on to play important roles in achieving women's suffrage and prohibition, was founded in Hillsboro in 1873. Since 1976 the city hosts the "Festival of the Bells" during the fourth of July weekend. Hillsboro was famous for the production of steel alloy bells, which were shipped around the world. Beginning in November 2022, several escaped emus roamed the city of Hillsboro and the surrounding areas. Geography Hillsboro is located at (39.205764, -83.613764). According to the United States Census Bureau, the city has a total area of , all land. Hill ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weston Price
Weston Andrew Valleau Price (September 6, 1870 – January 23, 1948) was a Canadian dentist known primarily for his theories on the relationship between nutrition, dental health, and physical health. He founded the research institute National Dental Association, which became the research section of the American Dental Association, and was the NDA's chairman from 1914 to 1928. Price initially did dental research on the relationship between endodontic therapy and pulpless teeth and broader systemic disease, known as focal infection theory, a theory which resulted in many extractions of tonsils and teeth. Focal infection theory fell out of favor in the 1930s and was pushed to the margins of dentistry by the 1950s. By 1930, Price had shifted his interest to nutrition. In 1939, he published ''Nutrition and Physical Degeneration'',Price, Weston A. Nutrition and Physical Degeneration A Comparison of Primitive and Modern Diets and Their Effects'' 1939. Paul B. Hoeber, Inc; Medical Book ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1918 Deaths
This year is noted for the end of the World War I, First World War, on the eleventh hour of the eleventh day of the eleventh month, as well as for the Spanish flu pandemic that killed 50–100 million people worldwide. Events Below, the events of World War I have the "WWI" prefix. January * January – 1918 flu pandemic: The "Spanish flu" (influenza) is first observed in Haskell County, Kansas. * January 4 – The Finnish Declaration of Independence is recognized by Russian Soviet Federative Socialist Republic, Soviet Russia, Sweden, German Empire, Germany and France. * January 9 – Battle of Bear Valley: U.S. troops engage Yaqui people, Yaqui Native American warriors in a minor skirmish in Arizona, and one of the last battles of the American Indian Wars between the United States and Native Americans. * January 15 ** The keel of is laid in Britain, the first purpose-designed aircraft carrier to be laid down. ** The Red Army (The Workers and Peasants Red Army) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1853 Births
Events January–March * January 6 – Florida Governor Thomas Brown signs legislation that provides public support for the new East Florida Seminary, leading to the establishment of the University of Florida. * January 8 – Taiping Rebellion: Zeng Guofan is ordered to assist the governor of Hunan in organising a militia force to search for local bandits. * January 12 – Taiping Rebellion: The Taiping army occupies Wuchang. * January 19 – Giuseppe Verdi's opera ''Il Trovatore'' premieres in performance at Teatro Apollo in Rome. * February 10 – Taiping Rebellion: Taiping forces assemble at Hanyang, Hankou, and Wuchang, for the march on Nanjing. * February 12 – The city of Puerto Montt is founded in the Reloncaví Sound, Chile. * February 22 – Washington University in St. Louis is founded as Eliot Seminary. * March – The clothing company Levi Strauss & Co. is founded in the United States. * March 4 – Inauguration of Franklin Pierce as 14th President of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Dentists
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] |
Lysle Johnston
Lysle E. Johnston Jr. is an American orthodontist. He was raised in East Jordan, Michigan, and began study at the University of Michigan College of Dentistry in 1957. He worked under James Scott at the University of Belfast in Ireland from 1961 to 1962, returning to earn an orthodontic Master of Science degree from Michigan in 1964. Johnston attended Case Western Reserve University for doctoral studies in anatomy, graduating in 1970. He taught at Case Western from 1971 to 1976, when he joined the Saint Louis University Saint Louis University (SLU) is a private Jesuit research university with campuses in St. Louis, Missouri, United States, and Madrid, Spain. Founded in 1818 by Louis William Valentine DuBourg, it is the oldest university west of the Mississip ... faculty. Johnston was appointed Robert W. Browne Professor of Dentistry and Chair of the Department of Orthodontics at the University of Michigan in 1991, and served until retirement in 2005. Johnston has received ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jeanne Sinkford
Jeanne Craig Sinkford (born 1933) is an American dentist and academic administrator. She was the first female dean of an American dental school. She is a senior scholar in residence at the American Dental Education Association and a professor and dean emeritus at the dental school of Howard University. Biography Sinkford was born in 1933, one of four sisters who all went on to attend college. She said that her parents, a grandfather, and her experiences at a Catholic middle school contributed to her disciplined upbringing. She attended Dunbar High School in Washington, D.C., a school for high-achieving African Americans, where she was a member of the cadet corps. At the age of 16, Sinkford enrolled in college at Howard University, studying psychology and chemistry before pursuing dental school there. After graduating from dental school, Sinkford was a faculty member in prosthodontics, had a part-time dental practice, and earned a Ph.D. in physiology at Northwestern University. Lat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William R
William is a male given name of Germanic origin.Hanks, Hardcastle and Hodges, ''Oxford Dictionary of First Names'', Oxford University Press, 2nd edition, , p. 276. It became very popular in the English language after the Norman conquest of England in 1066,All Things William"Meaning & Origin of the Name"/ref> and remained so throughout the Middle Ages and into the modern era. It is sometimes abbreviated "Wm." Shortened familiar versions in English include Will, Wills, Willy, Willie, Bill, and Billy. A common Irish form is Liam. Scottish diminutives include Wull, Willie or Wullie (as in Oor Wullie or the play ''Douglas''). Female forms are Willa, Willemina, Wilma and Wilhelmina. Etymology William is related to the given name ''Wilhelm'' (cf. Proto-Germanic ᚹᛁᛚᛃᚨᚺᛖᛚᛗᚨᛉ, ''*Wiljahelmaz'' > German ''Wilhelm'' and Old Norse ᚢᛁᛚᛋᛅᚼᛅᛚᛘᛅᛋ, ''Vilhjálmr''). By regular sound changes, the native, inherited English form of the name shoul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulfuric Acid
Sulfuric acid (American spelling and the preferred IUPAC name) or sulphuric acid ( Commonwealth spelling), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with the molecular formula . It is a colorless, odorless and viscous liquid that is miscible with water. Pure sulfuric acid does not exist naturally on Earth due to its strong affinity to water vapor; it is hygroscopic and readily absorbs water vapor from the air. Concentrated sulfuric acid is highly corrosive towards other materials, from rocks to metals, since it is an oxidant with powerful dehydrating properties. Phosphorus pentoxide is a notable exception in that it is not dehydrated by sulfuric acid, but to the contrary dehydrates sulfuric acid to sulfur trioxide. Upon addition of sulfuric acid to water, a considerable amount of heat is released; thus the reverse procedure of adding water to the acid should not be performed since the heat released may boi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ohio
Ohio () is a state in the Midwestern region of the United States. Of the fifty U.S. states, it is the 34th-largest by area, and with a population of nearly 11.8 million, is the seventh-most populous and tenth-most densely populated. The state's capital and largest city is Columbus, with the Columbus metro area, Greater Cincinnati, and Greater Cleveland being the largest metropolitan areas. Ohio is bordered by Lake Erie to the north, Pennsylvania to the east, West Virginia to the southeast, Kentucky to the southwest, Indiana to the west, and Michigan to the northwest. Ohio is historically known as the "Buckeye State" after its Ohio buckeye trees, and Ohioans are also known as "Buckeyes". Its state flag is the only non-rectangular flag of all the U.S. states. Ohio takes its name from the Ohio River, which in turn originated from the Seneca word ''ohiːyo'', meaning "good river", "great river", or "large creek". The state arose from the lands west of the Appalachian Mountai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cincinnati, Ohio
Cincinnati ( ) is a city in the U.S. state of Ohio and the county seat of Hamilton County. Settled in 1788, the city is located at the northern side of the confluence of the Licking and Ohio rivers, the latter of which marks the state line with Kentucky. The city is the economic and cultural hub of the Cincinnati metropolitan area. With an estimated population of 2,256,884, it is Ohio's largest metropolitan area and the nation's 30th-largest, and with a city population of 309,317, Cincinnati is the third-largest city in Ohio and 64th in the United States. Throughout much of the 19th century, it was among the top 10 U.S. cities by population, surpassed only by New Orleans and the older, established settlements of the United States eastern seaboard, as well as being the sixth-most populous city from 1840 until 1860. As a rivertown crossroads at the junction of the North, South, East, and West, Cincinnati developed with fewer immigrants and less influence from Europe than Ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
