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- Johan_Georg_Forchhammer abstract "Johan Georg Forchhammer (26 July 1794 – 14 December 1865) was a Danish mineralogist and geologist.Forchhammer was born at Husum, Schleswig. After studying at the universities of Kiel and Copenhagen from 1815 to 1818, he joined Hans Christian Ørsted and Lauritz Esmarch in their mineralogical exploration of Bornholm, and took a considerable share in the labors of the expedition. In 1820 he obtained his doctoral degree by a chemical treatise De mangano, and immediately after set out on a journey through England, Scotland and the Faroe Islands. In 1823 he was appointed lecturer at Copenhagen University on chemistry and mineralogy; in 1829 he obtained a similar post in the newly established polytechnic school; and in 1831 he was appointed professor of mineralogy in the university, and in 1848 became curator of the geological museum.From 1835 to 1837 he made many contributions to the geological survey of Denmark. On the death of Hans Christian Ørsted in 1851, he succeeded him as director of the polytechnic school and secretary of the Academy of Sciences. In 1850 he began with Japetus Steenstrup and Jens Jacob Asmussen Worsaae various anthropological publications which gained a high reputation. As a public instructor Forchhammer held a high place and contributed potently to the progress of his favorite studies in his native country. He interested himself in such practical questions as the introduction of gas into Copenhagen, the establishment of the fire-brigade at Rosenberg and the boring of artesian wells.In 1865, Johan Georg Forchhammer found that the ratio of major salts in samples of seawater from various locations was constant. This constant ratio is known as Forchhammer's Principle, or the Principle of Constant Proportions.Among his more important works are Lærebog i. de enkelte Radicalers Chemi (1842); Danmarks geognostiske Forhold (1835); Om de Bornholmske Kulformationer (1836); Dit myere Kridt i Danmark (1847); Bidrag til Skildringer af Danmarks geographiske Forhold i deres Afhængighed af Landets indre geognostiske Bygning (1858). A list of his contributions to scientific periodicals, Danish, English and German, will be found in the Catalogue of Scientific Papers published by the Royal Society of London. One of the most interesting and most recent is "On the Constitution of Sea Water at Different Depths and in Different Latitudes", in the Proceedings of the Roy. Soc. xii. (1862-1863).He was a Commander of the Order of the Dannebrog, and was a member of the Royal Danish Academy of Sciences and Letters from 1825. In 1863, he was elected a foreign member of the Royal Swedish Academy of Sciences. He died at Copenhagen.He was the brother of August Friedrich Wilhelm Forchhammer, father of Johannes Nicolai Georg Forchhammer, and grandfather of Johannes Georg Forchhammer.".
- Johan_Georg_Forchhammer birthDate "1794-07-24".
- Johan_Georg_Forchhammer birthYear "1794".
- Johan_Georg_Forchhammer deathDate "1865-12-14".
- Johan_Georg_Forchhammer deathYear "1865".
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- Johan_Georg_Forchhammer dateOfBirth "1794-07-24".
- Johan_Georg_Forchhammer dateOfDeath "1865-12-14".
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- Johan_Georg_Forchhammer name "Forchhammer, Johan Georg".
- Johan_Georg_Forchhammer shortDescription "Danish mineralogist and geologist".
- Johan_Georg_Forchhammer description "Danish mineralogist and geologist".
- Johan_Georg_Forchhammer description "Danish mineralogist and geologist".
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- Johan_Georg_Forchhammer comment "Johan Georg Forchhammer (26 July 1794 – 14 December 1865) was a Danish mineralogist and geologist.Forchhammer was born at Husum, Schleswig. After studying at the universities of Kiel and Copenhagen from 1815 to 1818, he joined Hans Christian Ørsted and Lauritz Esmarch in their mineralogical exploration of Bornholm, and took a considerable share in the labors of the expedition.".
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- Johan_Georg_Forchhammer givenName "Johan Georg".
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- Johan_Georg_Forchhammer name "Forchhammer, Johan Georg".
- Johan_Georg_Forchhammer name "Johan Georg Forchhammer".
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