|
Carl Auer Von Welsbach
Carl Auer von Welsbach (1 September 1858 – 4 August 1929), who received the Austrian noble title of Freiherr Auer von Welsbach in 1901, was an Austrian scientist and inventor, who separated didymium into the elements neodymium and praseodymium in 1885. He was also one of three scientists to independently discover the element lutetium (which he named ''cassiopeium''), separating it from ytterbium in 1907, setting off the longest priority dispute in the history of chemistry. He had a talent not only for making scientific advances, but also for turning them into commercially successful products. His work on rare-earth elements led to the development of the ferrocerium "flints" used in modern lighters, the gas mantle that brought light to the streets of Europe in the late 19th century, and the metal-filament light bulb. He took the phrase ''plus lucis'', meaning "more light", as his motto. Early life Carl Auer was born in Vienna on 1 September 1858 to Alois Auer and h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vienna
en, Viennese , iso_code = AT-9 , registration_plate = W , postal_code_type = Postal code , postal_code = , timezone = CET , utc_offset = +1 , timezone_DST = CEST , utc_offset_DST = +2 , blank_name = Vehicle registration , blank_info = W , blank1_name = GDP , blank1_info = € 96.5 billion (2020) , blank2_name = GDP per capita , blank2_info = € 50,400 (2020) , blank_name_sec1 = HDI (2019) , blank_info_sec1 = 0.947 · 1st of 9 , blank3_name = Seats in the Federal Council , blank3_info = , blank_name_sec2 = GeoTLD , blank_info_sec2 = .wien , website = , footnotes = , image_blank_emblem = Wien logo.svg , blank_emblem_size = Vienna ( ; german: Wien ; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientist
A scientist is a person who conducts scientific research to advance knowledge in an area of the natural sciences. In classical antiquity, there was no real ancient analog of a modern scientist. Instead, philosophers engaged in the philosophical study of nature called natural philosophy, a precursor of natural science. Though Thales (circa 624-545 BC) was arguably the first scientist for describing how cosmic events may be seen as natural, not necessarily caused by gods,Frank N. Magill''The Ancient World: Dictionary of World Biography'', Volume 1 Routledge, 2003 it was not until the 19th century that the term ''scientist'' came into regular use after it was coined by the theologian, philosopher, and historian of science William Whewell in 1833. In modern times, many scientists have advanced degrees in an area of science and pursue careers in various sectors of the economy such as academia, industry, government, and nonprofit environments.'''' History ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Austro-Hungarian Army
The Austro-Hungarian Army (, literally "Ground Forces of the Austro-Hungarians"; , literally "Imperial and Royal Army") was the ground force of the Austro-Hungarian Dual Monarchy from 1867 to 1918. It was composed of three parts: the joint army (, "Common Army", recruited from all parts of the country), the Imperial Austrian Landwehr (recruited from Cisleithania), and the Royal Hungarian Honvéd (recruited from Transleithania). In the wake of fighting between the Austrian Empire and the Hungarian Kingdom and the two decades of uneasy co-existence following, Hungarian soldiers served either in mixed units or were stationed away from Hungarian areas. With the Austro-Hungarian Compromise of 1867 the new tripartite army was brought into being. It existed until the disestablishment of the Austro-Hungarian Empire following World War I in 1918. The joint "Imperial and Royal Army" ( or ''k.u.k.'') units were generally poorly trained and had very limited access to new equipment bec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Realschule Josefstadt
''Realschule'' () is a type of secondary school in Germany, Switzerland and Liechtenstein. It has also existed in Croatia (''realna gimnazija''), the Austrian Empire, the German Empire, Denmark and Norway (''realskole''), Sweden (''realskola''), Finland (''reaalikoulu''), Hungary (''reáliskola''), Latvia (''reālskola''), Slovenia (''realka''), Serbia (''реалка''), and the Russian Empire (''реальное училище''). Germany Situation of the school In the German secondary school system, ''Realschule'' is ranked between Hauptschule (lowest) and Gymnasium (highest). After completing the ''Realschule'', good students are allowed to attend a professional Gymnasium or a general-education Gymnasium. They can also attend a ''Berufsschule'' or do an apprenticeship. In most states of Germany, students start the ''Realschule'' at the age of ten or eleven and typically finish school at the age of 16–17. In some states, ''Realschulen'' have recently been replaced by '' Ob ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Josefstadt
Josefstadt (; Central Bavarian: ''Josefstod'') is the eighth district of Vienna (german: 8. Bezirk, Josefstadt). It is near the center of Vienna and was established as a district in 1850, but borders changed later. Josefstadt is a heavily populated urban area with many workers and residential homes. Wien.gv.at webpage (see below: References). It has a population of 24,279 people (2014). With an area of 1.08 km² (.42 sq.mi.), Josefstadt is the smallest district in Vienna, and was named after the Holy Roman Emperor Joseph I. It consists of the former ''Vorstädte'' of Josefstadt, Breitenfeld, Strozzigrund, and Alt-Lerchenfeld, as well as parts of St. Ulrich and Alservorstadt. The district borders are formed by Alser Straße (north), Lerchenfelderstraße (south), Hernalsergürtel and Lerchenfeldergürtel in the west, and Auerspergstraße and Landesgerichtsstraße in the east. Josefstadt has developed into a middle-class neighbourhood. Most mayors of Vienna have lived ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mariahilf
Mariahilf (; Central Bavarian: ''Mariahüf'') is the 6th municipal district of Vienna, Austria (german: 6. Bezirk). It is near the center of Vienna and was established as a district in 1850. Mariahilf is a heavily populated urban area with many residential buildings. Wien.gv.at webpage (see below: References). Vienna Districts data, wien.gv.at, 2008, webpage: -->bezirksportraets08.pdf wien.gv.at-portraets08-PDF. It has a population of 31,621 (as of 2016-01-01) within an area of . Location Mariahilf is located southwest of Vienna's centre ( 1st district). In the north, Mariahilfer Straße, Vienna's most important shopping street, is its border with Neubau, in the south, the valley of the Vienna River, in the west, the Gürtel beltway. It consists of the five neighbourhoods (historical ''Vorstädte'', i.e. towns): Mariahilf, Gumpendorf, Windmühle, Magdalenengrund and Laimgrube. History First settlements around the Roman roads of the area developed around the year ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ritter
Ritter (German for "knight") is a designation used as a title of nobility in German-speaking areas. Traditionally it denotes the second-lowest rank within the nobility, standing above " Edler" and below "Freiherr" (Baron). As with most titles and designations within the nobility in German-speaking areas, the rank was hereditary and generally was used with the nobiliary particle of von or zu before a family name. For its historical association with warfare and the landed gentry in the Middle Ages, the title of Ritter can be considered roughly equal to the titles of "Knight", but it is hereditary like the British title of "Baronet". The wife of a Ritter was called a "Frau" (in this sense "Lady") and not Ritterin. In heraldry, from the late 18th century a Ritter was often indicated by the use of a coronet with five points, although not everyone who was a Ritter and displayed arms made use of such a coronet. In the Austrian Empire and Austria-Hungary the title of "Ritter von" was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alois Auer
Alois Auer (11 May 1813 – 10 July 1869) was an Austrian printer, inventor and botanical illustrator, most active during the 1840s and 1850s. He produced a number of works in German and other languages, including the first regarding the nature printing process. He was the director of the Austrian state's official printing house (''Hof- und Staatsdruckerei''), which created illustrated volumes of scientific interest and produced many advances in printing technology. His full name in later life, incorporating the Austrian hereditary knighthood that he was given in 1860, was Alois Ritter Auer von Welsbach. Life and career Born in the Austrian city of Wels, Auer was trained as a compositor. In his leisure moments, he studied French, Italian, English and other languages, in which he underwent an examination in 1835 and 1836 at the University of Vienna. Auer's early career began in October 1837 with an appointment as professor of Italian at a gymnasium in Linz. He acquired fluency in o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light Bulb
An electric light, lamp, or light bulb is an electrical component that produces light. It is the most common form of artificial lighting. Lamps usually have a base made of ceramic, metal, glass, or plastic, which secures the lamp in the socket of a light fixture, which is often called a "lamp" as well. The electrical connection to the socket may be made with a screw-thread base, two metal pins, two metal caps or a bayonet cap. The three main categories of electric lights are incandescent lamps, which produce light by a filament heated white-hot by electric current, gas-discharge lamps, which produce light by means of an electric arc through a gas, such as fluorescent lamps, and LED lamps, which produce light by a flow of electrons across a band gap in a semiconductor. Before electric lighting became common in the early 20th century, people used candles, gas lights, oil lamps, and fires. Vasily Vladimirovich Petrov developed the first persistent electric arc in 1802, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gas Mantle
A Coleman white gas lantern mantle glowing at full brightness An incandescent gas mantle, gas mantle or Welsbach mantle is a device for generating incandescent bright white light when heated by a flame. The name refers to its original heat source in gas lights which illuminated the streets of Europe and North America in the late 19th century. ''Mantle'' refers to the way it hangs like a cloak above the flame. Gas mantles were also used in portable camping lanterns, pressure lanterns and some oil lamps. Gas mantles are usually sold as fabric items, which, because of impregnation with metal nitrates, burns away to leave a rigid but fragile mesh of metal oxides when heated during initial use; these metal oxides produce light from the heat of the flame whenever used. Thorium dioxide was commonly a major component; being radioactive, it has led to concerns about the safety of those involved in manufacturing mantles. Normal use, however, poses minimal health risk. Mechanism ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lighter
A lighter is a portable device which creates a flame, and can be used to ignite a variety of items, such as cigarettes, gas lighter, fireworks, candles or campfires. It consists of a metal or plastic container filled with a flammable liquid or compressed gas, a means of ignition to produce the flame, and some provision for extinguishing the flame. Alternatively, a lighter can be powered by electricity, using an electric arc or heating element to ignite the target. History The first lighters were converted flintlock pistols that used gunpowder. In 1662 the Turkish traveller Evliya Çelebi visited Vienna as a member of an Ottoman diplomatic mission and admired the lighters being manufactured there: “Enclosed in a kind of tiny box are tinder, a steel, sulphur and resinous wood. When struck just like a firearm wheel the wood bursts into flame. This is useful for soldiers on campaign.” One of the first lighters was invented by a German chemist named Johann Wolfgang Döberein ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ferrocerium
Ferrocerium (also known in Europe as Auermetall) is a synthetic pyrophoric alloy of mischmetal (cerium, lanthanum, neodymium, other trace lanthanides and some iron – about 95% lanthanides and 5% iron) hardened by blending in oxides of iron and/or magnesium. When struck with a harder material, the mixture produces hot sparks that can reach temperatures of when rapidly oxidized by the process of striking the rod. Striking both scrapes fragments off, exposing them to the oxygen in the air, and easily ignites them by friction heat due to cerium's remarkably low ignition temperature of ~. Its easy flammability gives ferrocerium many commercial applications, such as the ignition source for lighters, strikers for gas welding and cutting torches, deoxidization in metallurgy, and ferrocerium rods. Because of ferrocerium's ability to ignite in adverse conditions, rods of ferrocerium (also called ferro rods, spark rods, and flint-spark-lighters) are commonly used as an eme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
