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René Just Haüy
René Just Haüy () FRS MWS FRSE (28 February 1743 – 1 June 1822) was a French priest and mineralogist, commonly styled the Abbé Haüy after he was made an honorary canon of Notre-Dame de Paris, Notre Dame. Due to his innovative work on crystal structure and his four-volume ''Traité de Minéralogie'' (1801), he is often referred to as the "Father of Modern Crystallography". During the French Revolution he also helped to establish the metric system. Biography Early life René-Just Haüy was born at Saint-Just-en-Chaussée on February 28, 1743, in the Provinces of France, province of Picardy (later the ''département in France, département'' of Oise). His parents were Just Haüy, a poor linen-weaver, and his wife Magdeleine Candelot. Haüy's interest in the services and music of the local church brought him to the attention of the Prior (ecclesiastical), prior of a nearby abbey of Premonstratensians, Premonstrants. Through him, Haüy was introduced to a colleague in Paris ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint-Just-en-Chaussée
Saint-Just-en-Chaussée (; ) is a Communes of France, commune in the Oise Departments of France, department in northern France. Saint-Just-en-Chaussée station has rail connections to Amiens, Creil and Paris. History Its name refers to Saint Justus of Beauvais, who is said to have been martyred at this spot. Population Personalities Valentin Haüy and René Just Haüy (brothers) were born in Saint-Just-en-Chaussée. See also * Communes of the Oise department References Communes of Oise {{ClermontArrondissement-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deacon
A deacon is a member of the diaconate, an office in Christian churches that is generally associated with service of some kind, but which varies among theological and denominational traditions. Major Christian denominations, such as the Catholic Church, the Oriental Orthodox Churches, the Eastern Orthodox Church, Lutheranism, Presbyterianism, Methodism, and Anglicanism, view the diaconate as an order of ministry. Permanent deacons (or distinctive deacons) are those who do not later transition to another form of ministry, in contrast to those continuing their formation who are then often called transitional deacons. Origin and development The word ''deacon'' is derived from the Greek word (), which is a standard ancient Greek word meaning "servant", "waiter", "minister", or "messenger". Recent research has highlighted the role of the deacon "as a co-operator" and "go-between," emphasizing their intermediary position in early Christian communities. It is generally assum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barium
Barium is a chemical element; it has symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Because of its high chemical reactivity, barium is never found in nature as a free element. The most common minerals of barium are barite ( barium sulfate, BaSO4) and witherite ( barium carbonate, BaCO3). The name ''barium'' originates from the alchemical derivative "baryta", from Greek (), meaning 'heavy'. ''Baric'' is the adjectival form of barium. Barium was identified as a new element in 1772, but not reduced to a metal until 1808 with the advent of electrolysis. Barium has few industrial applications. Historically, it was used as a getter for vacuum tubes and in oxide form as the emissive coating on indirectly heated cathodes. It is a component of YBCO (high-temperature superconductors) and electroceramics, and is added to steel and cast iron to reduce the size of carbon grains within the microstructure. Barium compounds ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crystallography Haüy Integrant Molecules Form Pentagonal Dodecahedron Of Pyrite 1801
Crystallography is the branch of science devoted to the study of molecular and crystalline structure and properties. The word ''crystallography'' is derived from the Ancient Greek word (; "clear ice, rock-crystal"), and (; "to write"). In July 2012, the United Nations recognised the importance of the science of crystallography by proclaiming 2014 the International Year of Crystallography.UN announcement "International Year of Crystallography" iycr2014.org. 12 July 2012 Crystallography is a broad topic, and many of its subareas, such as , are themselves important scientific topics. Crystallography ranges from the fundamentals o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhomboid
Traditionally, in two-dimensional geometry, a rhomboid is a parallelogram in which adjacent sides are of unequal lengths and angles are non-right angled. The terms "rhomboid" and "parallelogram" are often erroneously conflated with each other (i.e, when most people refer to a "parallelogram" they almost always mean a rhomboid, a specific subtype of parallelogram); however, while all rhomboids are parallelograms, not all parallelograms are rhomboids. A parallelogram with sides of equal length ( equilateral) is called a ''rhombus'' but not a rhomboid. A parallelogram with right angled corners is a ''rectangle'' but not a rhomboid. A parallelogram is a rhomboid if it is neither a rhombus nor a rectangle. History Euclid introduced the term in his '' Elements'' in Book 1, Definition 22, Euclid never used the definition of rhomboid again and introduced the word parallelogram in Proposition 34 of Book 1; ''"In parallelogrammic areas the opposite sides and angles are equal to on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calcareous Spar
Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). It is a very common mineral, particularly as a component of limestone. Calcite defines hardness 3 on the Mohs scale of mineral hardness, based on scratch hardness comparison. Large calcite crystals are used in optical equipment, and limestone composed mostly of calcite has numerous uses. Other polymorphs of calcium carbonate are the minerals aragonite and vaterite. Aragonite will change to calcite over timescales of days or less at temperatures exceeding 300 °C, and vaterite is even less stable. Etymology Calcite is derived from the German , a term from the 19th century that came from the Latin word for lime, (genitive ) with the suffix ''-ite'' used to name minerals. It is thus a doublet of the word ''chalk''. When applied by archaeologists and stone trade professionals, the term alabaster is used not just as in geology and mineralogy, where it is reserved for a variety of gyps ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crystallography
Crystallography is the branch of science devoted to the study of molecular and crystalline structure and properties. The word ''crystallography'' is derived from the Ancient Greek word (; "clear ice, rock-crystal"), and (; "to write"). In July 2012, the United Nations recognised the importance of the science of crystallography by proclaiming 2014 the International Year of Crystallography.UN announcement "International Year of Crystallography" iycr2014.org. 12 July 2012 Crystallography is a broad topic, and many of its subareas, such as X-ray crystallography, are themselves important scientific topics. Crystallography ranges from the fundamentals of crystal structure to the mathematics of Crystal system, crystal geometry, including those that are Aperiodic crystal, not periodic or quasi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural History
Natural history is a domain of inquiry involving organisms, including animals, fungi, and plants, in their natural environment, leaning more towards observational than experimental methods of study. A person who studies natural history is called a naturalist or natural historian. Natural history encompasses scientific research but is not limited to it. It involves the systematic study of any category of natural objects or organisms, so while it dates from studies in the ancient Greco-Roman world and the mediaeval Arabic world, through to European Renaissance naturalists working in near isolation, today's natural history is a cross-discipline umbrella of many specialty sciences; e.g., geobiology has a strong multidisciplinary nature. Definitions Before 1900 The meaning of the English term "natural history" (a calque of the Latin ''historia naturalis'') has narrowed progressively with time, while, by contrast, the meaning of the related term "nature" has widened (see also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Institut National Des Jeunes Aveugles
The Institut National des Jeunes Aveugles (''National Institute for Blind Youth'') is a Special education, special school for Visual impairment, blind students in Paris, France. It is considered the first Blindness and education, school for the blind in the Western world, and has served as a model for many subsequent schools for blind students. Origins At the end of the 18th century, Europeans began to take an interest in the education of the blind. Before that time, the blind were treated as if they were incapable of being educated (despite the fact that many blind people born to families with the means to provide them with individual tutoring had become well educated). In 1784, Valentin Haüy, a linguist and translator for the king, appalled at the treatment of blind people and the fact that most blind people were poor and unable to do more than beg for a living, undertook to teach a young blind man called François Lesueur to read raised letters, proving that the blind were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valentin Haüy
Valentin Haüy (pronounced ; 13 November 1745 – 19 March 1822) was the founder, in 1785, of the first school for the blind, the Institute for Blind Youth in Paris (now Institut National des Jeunes Aveugles, or the ''National Institute for the Young Blind'', INJA). In 1819, Louis Braille entered this school. Life Haüy was born into a family of weavers. His father, a full-time loomer, also held the job of ringing the Angelus bells in a local Premonstratensian, Premonstrant Abbey. The abbey monks educated Valentin and he became a skilled Linguistics, linguist speaking ten different languages of the day. He also studied Ancient Greek and Biblical Hebrew, Hebrew. In 1783, he gained the title "interpreter to the king", Louis XVI. In 1786, he was the interpreter of the King, to the Admiralty and the City Hall. He was a member of the Office of Writing. Haüy's impulse to help the blind started in 1771, after he stopped for lunch in a cafe on the Place de la Concorde, Paris. There, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mineralogy
Mineralogy is a subject of geology specializing in the scientific study of the chemistry, crystal structure, and physical (including optical mineralogy, optical) properties of minerals and mineralized artifact (archaeology), artifacts. Specific studies within mineralogy include the processes of mineral origin and formation, classification of minerals, their geographical distribution, as well as their utilization. History Early writing on mineralogy, especially on gemstones, comes from ancient Babylonia, the ancient Greco-Roman world, ancient and medieval History of China, China, and Sanskrit texts from History of India, ancient India and the ancient Islamic world. Books on the subject included the ''Naturalis Historia, Natural History'' of Pliny the Elder, which not only described many different minerals but also explained many of their properties, and Kitab al Jawahir (Book of Precious Stones) by Persian scientist Al-Biruni. The German Renaissance specialist Georgius Agricola ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louis-Jean-Marie Daubenton
Louis Jean-Marie Daubenton (; 29 May 1716 – 1 January 1800) was a French natural history, naturalist and contributor to the ''Encyclopédie, Encyclopédie ou Dictionnaire raisonné des sciences, des arts et des métiers''. Biography Daubenton was born at Montbard, Côte-d'Or. His father, Jean Daubenton, a Civil law notary, notary, intended him for the church, and sent him to Paris, France, Paris to study theology, but Louis-Jean-Marie was more interested in medicine. Jean's death in 1736 set his son free to choose his own career, and in 1741 he graduated in medicine at Reims and returned to his hometown, planning to practice as a physician. At about this time, Georges-Louis Leclerc, Comte de Buffon, Georges-Louis Leclerc de Buffon, also a native of Montbard, was preparing to bring out a multi-volume work on natural history, the ''Histoire naturelle, générale et particulière'', and in 1742 he invited Daubenton to assist him by providing anatomical descriptions. In many res ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
