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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 – A determined band of 35 religious dissenters – Pilgrims set sail for Virginia from Plymouth, England in the ''Mayflower'', jubilant at the prospect of practicing their unorthodox brand of worship in the New World. *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 independ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 11 – Ching-Thang Khomba is crowned King of Manipur. * 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 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert College
The American Robert College of Istanbul ( tr, İstanbul Özel Amerikan Robert Lisesi or ), often shortened to Robert, or RC, is a highly selective, independent, co-educational high school in Turkey.The Turkish education system divides schools into two classes: public or private. According to this classification, Robert College is a private school. 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. Robert College is consistently ranked as the top private high school in Turkey. The school has a long list of notable alumni, including entrepreneurs, politicians, journalists, artists, three Turkish prime ministers, four Bulgarian prime ministers, multiple members of the Turkish cabinet, Nobel laureate Orhan Pamuk a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1863
Events January–March * 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 an official war goal. It proclaims 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 Union armies advance. * January 2 – Lucius Tar Painting Master Company (''Teerfarbenfabrik Meirter Lucius''), predecessor of Hoechst, as a worldwide chemical manufacturing brand, founded in a suburb of Frankfurt am Main, Germany. * January 4 – The New Apostolic Church, a Christian and chiliastic church, is established in Hamburg, Germany. * January 7 – In the Swiss canton of Ticino, the village of Bedretto is partly destroyed and 29 killed, by an avalanche. * January 8 ** The Yorkshire County Cricket Club is founded at the Adelphi Hotel, in Sheffield, England. ** American Civil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birefringence
Birefringence 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 said to be 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 calcite, a crystal having one of the strongest birefringences. In the 19th century Augustin-Jean Fresnel described the phenomenon in terms of polarization, understanding light as a wave with field components in transverse po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photoelasticity
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, where it gives a picture of stress distributions around discontinuities in materials. Photoelastic experiments (also informally referred to as ''photoelasticity'') are an important tool for determining critical stress points in a material, and are used for determining stress concentration in irregular geometries. 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.A. Fresnel, "Note sur la double réfraction du verre comprimé" (read 16 September 1822), ''Annales de Chimie et de Physique'', Ser. 2, vol. 20, pp. 376–83 (nominally for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David Brewster
Sir David Brewster KH PRSE FRS FSA Scot FSSA 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 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 optics." A pioneer in photography, Brewster invented an improved stereoscope, which he called "lenticular stereoscope" and which became the first portable 3D-viewing device. He also invented the stereoscopic camera, two types of polarimeters, the polyzonal lens, the l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
French Academy Of Sciences
The French Academy of Sciences (French: ''Académie des 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 research. It was at the forefront of scientific developments in Europe in the 17th and 18th centuries, and is one of the earliest Academies of Sciences. Currently headed by Patrick Flandrin (President of the Academy), it is one of the five Academies of the Institut de France. 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 Nationals, 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 institution. In contrast to its Bri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Augustin-Jean Fresnel
Augustin-Jean Fresnel (10 May 1788 – 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 Newton's corpuscular theory, from the late 1830s until the end of the 19th century. He is perhaps better known for inventing the 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 dioptric (purely refractive) stepped lens, first proposed by Count Buffon and independently reinvented by Fresnel, is used in screen magnifiers and in condenser lenses for overhead projectors. By expressing Huygens's principle of secondary waves and Young's principle of interference in quantitative terms, and supposing that simple colors consist of sinusoidal waves, Fresnel gave the first satisfactory explanation of diffraction by straight edges, inclu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 made prisoner in Paraguay accused of being a spy. * January 7 – The first group of freed slaves from the United States 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 Portuguese 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 naval flag. * January 14 – Greek War of Independence: Acrocorinth is captured by Theodoros Kolokotronis and Demetrios Ypsilantis. * February 6 – Chinese junk '' Tek Sing'' sinks in the South China Sea, with the loss of around 1,600 people on board. * February 9 – The invading Haitian forces, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mexican War Of Independence
The Mexican War of Independence ( es, Guerra de Independencia de México, links=no, 16 September 1810 – 27 September 1821) was an armed conflict and political process resulting in Mexico's independence from Spain. It was not a single, coherent event, but local and regional struggles that occurred within the same period, and can be considered a revolutionary civil war. Independence was not an inevitable outcome, but events in Spain directly impacted the outbreak of the armed insurgency in 1810 and its course until 1821. Napoleon Bonaparte's invasion of Spain in 1808 touched off a crisis of legitimacy of crown rule, since he had placed his brother Joseph on the Spanish throne after forcing the abdication of the Spanish monarch Charles IV. In Spain and many of its overseas possessions, the local response was to set up juntas ruling in the name of the Bourbon monarchy. Delegates in Spain and overseas territories met in Cádiz, Spain, still under Spanish control, as the Cor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miguel Hidalgo
Don Miguel Gregorio Antonio Ignacio Hidalgo y Costilla y Gallaga Mandarte Villaseñor (8 May 1753 – 30 July 1811), more commonly known as Miguel Hidalgo y Costilla or Miguel Hidalgo (), was a Catholic priest, leader of the Mexican War of Independence and 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 their King Ferdinand VII, held captive during the Peninsular War, by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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