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Adolf Repsold
Adolf Repsold (31 August 1806 – 13 March 1871) was a German astronomical and scientific instrument maker, son of the astronomer and fireman Johann Georg Repsold. He established the company A. & G. Repsold along with his brother and it was continued by his son Johann Adolf Repsold under the name of A. Repsold & Söhne in Hamburg. Repsold was born in Hamburg, the son of fire-brigade captain and astronomer Johann Georg Repsold who died in a fire in 1830 after which he took his father's place in the fire service. Along with his brother Georg Repsold (1804–1867), they continued their father's instrument business as A. & G. Repsold company specializing in the fabrication of astronomical and scientific instruments. Collaborations with Carl August Steinheil led to several innovations including a measuring graticule within the eyepiece. Repsold's instruments were widely in use in astronomical observatories across Europe and included the Oxford Heliometer. A universal (theodolite) instrum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Georg Repsold
Johann Georg Repsold (19 September 1770 – 14 January 1830) was a German astronomer and fireman. He began to make astronomic instruments mainly for his own use and his third son Adolf Repsold went on to establish a well-known astronomical instrument making company A & G. Repsold which later became A. Repsold and Sohne. Repsold was born in Wremen near Bremerhaven to a clergyman Johann and his wife Charlotte Friederike Böhmer. Repsold initially studied for a career in theology but moved to study mathematics and drawing under Reinhard Woltmann, an Elbe River pilot who later worked for the Hamburg waterworks. In 1795 Repsold became a river pilot and in 1799 he married Eleonore Scharff, daughter of a captain in the fire brigade and in the same year, he too joined the fire brigade of Hamburg. He met the Swiss astronomer Johann Kaspar Horner who was making measurements in the Elbe river and discovered a common interest in astronomic instrument design and in 1800 he established a w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hamburg
Hamburg (, ; nds, label=Hamburg German, Low Saxon, Hamborg ), officially the Free and Hanseatic City of Hamburg (german: Freie und Hansestadt Hamburg; nds, label=Low Saxon, Friee un Hansestadt Hamborg),. is the List of cities in Germany by population, second-largest city in Germany after Berlin, as well as the overall List of cities in the European Union by population within city limits, 7th largest city and largest non-capital city in the European Union with a population of over 1.85 million. Hamburg's urban area has a population of around 2.5 million and is part of the Hamburg Metropolitan Region, which has a population of over 5.1 million people in total. The city lies on the River Elbe and two of its tributaries, the River Alster and the Bille (Elbe), River Bille. One of Germany's 16 States of Germany, federated states, Hamburg is surrounded by Schleswig-Holstein to the north and Lower Saxony to the south. The official name reflects History of Hamburg, Hamburg's history ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl August Von Steinheil
Carl August von Steinheil (12 October 1801 – 14 September 1870) was a German physicist, inventor, engineer and astronomer. Biography Steinheil was born in Ribeauvillé, Alsace. He studied law in Erlangen since 1821. He then studied astronomy in Göttingen and Königsberg. He continued his studies in astronomy and physics while living in his father's manor in Perlachseck near Munich. From 1832 to 1849, Steinheil was professor for mathematics and physics at the University of Munich. In 1839, Steinheil used silver chloride and a cardboard camera to make pictures in negative from the Museum of Art and the Munich Frauenkirche, then taking another picture of the negative to get a positive, the actual black and white reproduction of a view on the object. The pictures produced were round with a diameter of 4 cm, the method was later named the “Steinheil method.” It was the first daguerreotype in Germany. In 1846, Steinheil travelled to Naples to install a new system for weig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Friedrich Georg Wilhelm Von Struve
Friedrich Georg Wilhelm von Struve (russian: link=no, Василий Яковлевич Струве, trans. ''Vasily Yakovlevich Struve''; 15 April 1793 – ) was a Baltic German astronomer and geodesist from the famous Struve family. He is best known for studying double stars and for initiating a triangulation survey later named Struve Geodetic Arc in his honor. Life He was born at Altona, Duchy of Holstein (then a part of the Denmark–Norway kingdoms), the son of Jacob Struve (1755–1841). Struve's father moved the family away from the French occupation to Dorpat (Tartu) in Estonia (then part of the Russian Empire) to avoid military service,V. K. Abalkin ''et al.'Struve dynasty (in Russian), St. Petersburg University equipped with Danish passports. In 1808 he entered the [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1806 Births
Eighteen or 18 may refer to: * 18 (number), the natural number following 17 and preceding 19 * one of the years 18 BC, AD 18, 1918, 2018 Film, television and entertainment * ''18'' (film), a 1993 Taiwanese experimental film based on the short story ''God's Dice'' * ''Eighteen'' (film), a 2005 Canadian dramatic feature film * 18 (British Board of Film Classification), a film rating in the United Kingdom, also used in Ireland by the Irish Film Classification Office * 18 (''Dragon Ball''), a character in the ''Dragon Ball'' franchise * "Eighteen", a 2006 episode of the animated television series '' 12 oz. Mouse'' Music Albums * ''18'' (Moby album), 2002 * ''18'' (Nana Kitade album), 2005 * '' 18...'', 2009 debut album by G.E.M. Songs * "18" (5 Seconds of Summer song), from their 2014 eponymous debut album * "18" (One Direction song), from their 2014 studio album ''Four'' * "18", by Anarbor from their 2013 studio album ''Burnout'' * "I'm Eighteen", by Alice Cooper commo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1871 Deaths
Events January–March * January 3 – Franco-Prussian War – Battle of Bapaume: Prussians win a strategic victory. * January 18 – Proclamation of the German Empire: The member states of the North German Confederation and the south German states, aside from Austria, unite into a single nation state, known as the German Empire. The King of Prussia is declared the first German Emperor as Wilhelm I of Germany, in the Hall of Mirrors at the Palace of Versailles. Constitution of the German Confederation comes into effect. It abolishes all restrictions on Jewish marriage, choice of occupation, place of residence, and property ownership, but exclusion from government employment and discrimination in social relations remain in effect. * January 21 – Giuseppe Garibaldi's group of French and Italian volunteer troops, in support of the French Third Republic, win a battle against the Prussians in the Battle of Dijon. * February 8 – 1871 French legislative election ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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