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September 16
Events Pre-1600 * 681 – Pope Honorius I is posthumously excommunicated by the Sixth Ecumenical Council. *1400 – Owain Glyndŵr is declared Prince of Wales by his followers. 1601–1900 * 1620 – Pilgrims set sail for Virginia from Plymouth, England in the '' Mayflower''. * 1701 – James Francis Edward Stuart, sometimes called the "Old Pretender", becomes the Jacobite claimant to the thrones of England and Scotland. * 1732 – In Campo Maior, Portugal, a storm hits the Armory and a violent explosion ensues, killing two-thirds of its inhabitants. * 1776 – American Revolutionary War: The Battle of Harlem Heights is fought. * 1779 – American Revolutionary War: The Franco-American Siege of Savannah begins. * 1810 – With the '' Grito de Dolores,'' Father Miguel Hidalgo begins Mexico's fight for independence from Spain. * 1822 – French physicist Augustin-Jean Fresnel, in a "note" read to the Academy of Sciences, report ...
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Battle Of Harlem Heights
The Battle of Harlem Heights was fought during the New York and New Jersey campaign of the American Revolutionary War. The action took place on September 16, 1776, in what is now the Morningside Heights area and east into the future Harlem neighborhoods of northwestern Manhattan Island in what is now part of New York City. The Continental Army, under Commander-in-chief General George Washington, Major General Nathanael Greene, and Major General Israel Putnam, totaling around 9,000 men, held a series of high ground positions in upper Manhattan. Immediately opposite was the vanguard of the British Army totaling around 5,000 men under the command of Major General Henry Clinton. An early morning skirmish between a patrol of Knowlton's Rangers and British light infantry pickets developed into a running fight as the British pursued the Americans back through woods towards Washington's position on Harlem Heights. The overconfident British light troops, having advanced too far from ...
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1779
Events January–March * January 11 ** British troops surrender to the Marathas in Wadgaon, India, and are forced to return all territories acquired since 1773. * January 22 – American Revolutionary War – Claudius Smith is hanged at Goshen, Orange County, New York for supposed acts of terrorism upon the people of the surrounding communities. * January 29 – After a second petition for partition from its residents, the North Carolina General Assembly abolishes Bute County, North Carolina (established 1764) by dividing it and naming the northern portion Warren County (for Revolutionary War hero Joseph Warren), the southern portion Franklin County (for Benjamin Franklin). The General Assembly also establishes Warrenton (also named for Joseph Warren) to be the seat of Warren County, and Louisburg (named for Louis XVI of France) to be the seat of Franklin County. * February 12 – Lieutenant Colonel Francisco Bouligny arrives with Malagueño ...
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Robert College
The American Robert College of Istanbul ( or ), often abbreviated as Robert or RC, is a Selective school, highly selective, Independent school, independent, mixed-sex education, co-educational, Education in Turkey#Private schools, private Secondary school, high school in Turkey. The school is situated in a wooded campus on the European side of Istanbul in the Beşiktaş district, with the historic Arnavutköy neighborhood to the east and the upscale Ulus neighborhood to the west. Founded in 1863, Robert College is the oldest continuously operating American school outside the United States. The school has a long list of Robert College alumni, list of notable alumni, including scientists, entrepreneurs, politicians, journalists, artists, three List of prime ministers of Turkey, Turkish prime ministers, four List of Prime Ministers of Bulgaria, Bulgarian prime ministers, multiple members of the Cabinet of Turkey, Turkish cabinet, Nobel Prize in Literature, Nobel laureate Orhan Pamu ...
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1863
Events January * January 1 – Abraham Lincoln signs the Emancipation Proclamation during the third year of the American Civil War, making the abolition of slavery in the Confederate States of America an official war goal. The signing proclaimed the freedom of 3.1 million of the nation's four million slaves and immediately frees 50,000 of them, with the rest freed as the Union Army advances. This event marks the start of America's Reconstruction era, Reconstruction Era. * January 2 – Master Lucius Tar Paint Company (''Teerfarbenfabrik Meister Lucius''), predecessor of Hoechst AG, Hoechst, as a worldwide Chemical, chemical manufacturing brand, founded in a suburb of Frankfurt am Main, Germany. * January 4 – Founding date of the New Apostolic Church, a Christian and chiliastic church, in a schism with the Catholic Apostolic Church in Hamburg, Germany. * January 7 – In the Cantons of Switzerland, Swiss canton of Ticino, the village of Bedretto is ...
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Birefringence
Birefringence, also called double refraction, is the optical property of a material having a refractive index that depends on the polarization and propagation direction of light. These optically anisotropic materials are described as birefringent or birefractive. The birefringence is often quantified as the maximum difference between refractive indices exhibited by the material. Crystals with non-cubic crystal structures are often birefringent, as are plastics under mechanical stress. Birefringence is responsible for the phenomenon of double refraction whereby a ray of light, when incident upon a birefringent material, is split by polarization into two rays taking slightly different paths. This effect was first described by Danish scientist Rasmus Bartholin in 1669, who observed it in Iceland spar (calcite) crystals which have one of the strongest birefringences. In the 19th century Augustin-Jean Fresnel described the phenomenon in terms of polarization, understanding ...
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Photoelasticity
In materials science, photoelasticity describes changes in the optical properties of a material under mechanical deformation. It is a property of all dielectric media and is often used to experimentally determine the stress distribution in a material. History The photoelastic phenomenon was first discovered by the Scottish physicist David Brewster, who immediately recognized it as stress-induced birefringence. That diagnosis was confirmed in a direct refraction experiment by Augustin-Jean Fresnel. * Reprinted in H. de Senarmont, E. Verdet, and L. Fresnel (eds.), ''Oeuvres complètes d'Augustin Fresnel'', vol. 1 (1866)pp. 713–18* Translated as Experimental frameworks were developed at the beginning of the twentieth century with the works of E.G. Coker and L.N.G. Filon of University of London. Their book ''Treatise on Photoelasticity'', published in 1930 by Cambridge Press, became a standard text on the subject. Between 1930 and 1940, many othe ...
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David Brewster
Sir David Brewster Knight of the Royal Guelphic Order, KH President of the Royal Society of Edinburgh, PRSE Fellow of the Royal Society of London, FRS Fellow of the Society of Antiquaries of Scotland, FSA Scot Fellow of the Scottish Society of Arts, FSSA Member of the Institution of Civil Engineers, MICE (11 December 178110 February 1868) was a British scientist, inventor, author, and academic administrator. In science he is principally remembered for his experimental work in physical optics, mostly concerned with the study of the Polarization (waves), polarization of light and including the discovery of Brewster's angle. He studied the birefringence of crystals under compression and discovered photoelasticity, thereby creating the field of optical mineralogy.A. D. Morrison-Low (2004) "Brewster, Sir David (1781–1868)" in ''Oxford Dictionary of National Biography'' For this work, William Whewell dubbed him the "father of modern experimental optics" and "the Johannes Kepler of o ...
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French Academy Of Sciences
The French Academy of Sciences (, ) is a learned society, founded in 1666 by Louis XIV at the suggestion of Jean-Baptiste Colbert, to encourage and protect the spirit of French Scientific method, scientific research. It was at the forefront of scientific developments in Europe in the 17th and 18th centuries, and is one of the earliest Academy of Sciences, Academies of Sciences. Currently headed by Patrick Flandrin (President of the academy), it is one of the five Academies of the . __TOC__ History The Academy of Sciences traces its origin to Colbert's plan to create a general academy. He chose a small group of scholars who met on 22 December 1666 in the King's library, near the present-day Bibliothèque nationale de France, Bibliothèque Nationale, and thereafter held twice-weekly working meetings there in the two rooms assigned to the group. The first 30 years of the academy's existence were relatively informal, since no statutes had as yet been laid down for the ins ...
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Augustin-Jean Fresnel
Augustin-Jean Fresnel (10 May 1788 â€“ 14 July 1827) was a French civil engineer and physicist whose research in optics led to the almost unanimous acceptance of the wave theory of light, excluding any remnant of Isaac Newton, Newton's corpuscular theory of light, corpuscular theory, from the late 1830s until the end of the 19th century. He is perhaps better known for inventing the Catadioptric system, catadioptric (reflective/refractive) Fresnel lens and for pioneering the use of "stepped" lenses to extend the visibility of lighthouses, saving countless lives at sea. The simpler Dioptrics, dioptric (purely refractive) stepped lens, first proposed by Georges-Louis Leclerc, Comte de Buffon, Count Buffon and independently reinvented by Fresnel, is used in screen magnifying glass, magnifiers and in condenser lenses for overhead projectors. By expressing Christiaan Huygens, Huygens's principle of secondary waves and Thomas Young (scientist), Young's principle of interference ...
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1822
Events January–March * January 1 – The Greek Constitution of 1822 is adopted by the First National Assembly at Epidaurus. * January 3 – The famous French explorer, Aimé Bonpland, is imprisoned in Paraguay on charges of espionage. * January 7 – The first freed slaves from the United States history of Liberia, arrive on the west coast of Africa, founding Monrovia on April 25. * January 9 – The Portuguese prince Pedro I of Brazil decides to stay in Brazil against the orders of the Portugal's John VI of Portugal, King João VI, beginning the Brazilian independence process. * January 13 – The design of the modern-day flag of Greece is adopted by the First National Assembly at Epidaurus, for their Maritime flag, naval flag. * January 14 – Greek War of Independence: Acrocorinth is captured by Theodoros Kolokotronis and Demetrios Ypsilantis. * February 6 – The Chinese Junk (ship), junk ''Tek Sing'' sinks in the South China Sea, drowning more than 1,800 people on ...
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Mexican War Of Independence
The Mexican War of Independence (, 16 September 1810 – 27 September 1821) was an armed conflict and political process resulting in Mexico's independence from the Spanish Empire. It was not a single, coherent event, but local and regional struggles that occurred within the same period, and can be considered a List of wars of independence, revolutionary civil war. It culminated with the drafting of the Declaration of Independence (Mexico), Declaration of Independence of the Mexican Empire in Mexico City on September 28, 1821, following the collapse of royal government and the military triumph of forces for independence. Mexican independence from Spain was not an inevitable outcome of the relationship between the Spanish Empire and its most valuable overseas possession, but events in Spain had a direct impact on the outbreak of the armed insurgency in 1810 and the course of warfare through the end of the conflict. Napoleon, Napoleon Bonaparte's Peninsular War, invasion of Spa ...
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Miguel Hidalgo
Don Miguel Gregorio Antonio Ignacio Hidalgo y Costilla Gallaga Mandarte y Villaseñor (8 May 1753 â€“ 30 July 1811), commonly known as Miguel Hidalgo y Costilla or simply Miguel Hidalgo (), was a Catholic priest, leader of the Mexican War of Independence, who is recognized as the Father of the Nation. A professor at the Colegio de San Nicolás Obispo in Valladolid, Hidalgo was influenced by Enlightenment ideas, which contributed to his ouster in 1792. He served in a church in Colima and then in Dolores. After his arrival, he was shocked by the rich soil he had found. He tried to help the poor by showing them how to grow olives and grapes, but in New Spain (modern Mexico) growing these crops was discouraged or prohibited by colonial authorities to prevent competition with imports from Spain. On 16 September 1810 he gave the Cry of Dolores, a speech calling upon the people to protect the interest of King Ferdinand VII, held captive as part of the Peninsular War, by rev ...
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