Johann David Hahn
Johann David Hahn (born July 9, 1729 in Heidelberg , † March 9, 1784 in Leiden ) was a German physicist , philosopher , astronomer , physician , botanist and chemist .
Life
The son of the merchant Heinrich Kaspar Hahn and his wife Eva Katharina Gaub grew up in a family with not inconsiderable prosperity. (March * 22 1736 in Heidelberg) so are his brothers Johann Georg Hahn and a brother, who later acted in Frankfurt am Main, known, but also a sister Eva Katharina Hahn, who's wife after her first marriage Gotthold Ephraim Lessing was . After he had received sufficient instructions at the Latin school of his hometown and private lessons, he enrolled on August 25, 1746 under the rectorate of his relative Hieronymus David Gaub (1705-1780) at the University of Leiden .
Here he completed further studies and acquired the academic degree of Doctor of Philosophy on April 23, 1751 with the treatise De efficacia mixtionis in mutandis corporum voluminibus (Leiden 1751) and the medical doctorate on the same day with the Disputation de Consudine (Leiden 1751). From 1752 he followed the publications of the Academy of Sciences in Göttingen for a while , of which he became a corresponding member in 1753. On March 1, 1753, the curators of the University of Utrecht appointed him Professor of Philosophy, Experimental Physics and Astronomy. He had taken over the office assigned to him on June 21, 1753 with the speech Sermo academicus de scientia naturali ab observationum et experimentorum sordibus repurganda . After taking part in the university's organizational tasks for the first time as rector of the Alma Mater in 1755/56 and resigning from this position with the speech of vera Logica , he was appointed professor of medicine, botany and chemistry on January 15, 1759.
He took over this activity on March 19, 1759 with the treatise Sermo academicus de chemiae cum botanica conjunctione utili et pulchra . In 1772/73 he was again rector of the Utrecht University, which office he resigned with the speech De usu venenorum in medicina . On May 24, 1775, the curators of the Leiden University appointed him professor of practical medicine and chemistry. He complied with this request and took office on September 25, 1775 with the speech de medico speculatore . Health reasons forced him to stop his academic activities on October 11, 1783. He died the following year.
Hahn dealt with the medicinal poisons that he tried to use in therapy. Therefore, he also dealt with antidotes, their abuse and those discoverers who had developed them in the field of toxicology.
Works
- De efficacia mixtionis in mutandis corporum voluminibus. Leiden 1751 ( PDF ).
- Disp. de potentiis oblique agentibus. Utrecht 1754.
- Oratio of the vera Logica. Utrecht 1756.
- Explicatio quaestionum mathematicarum de maximo et minimo in scientia machinali. Utrecht 1761.
- Disp. de igne. Utrecht 1765.
- Oratio de muruo Mathesos et chemiae auxilio. Utrecht 1768.
- Oratio De usu venenorum in medicina. Utrecht 1773.
- Oratio de medico speculatore. Leiden 1775.
- Editorships
- Gottfried Wilhelm Schilling comment. De leprosy. Leiden 1778.
- J. Walsii Logica Latine versa. Utrecht 1754.
literature
- Johann Georg Meusel : Lexicon of the German writers who died from 1750 to 1800. Volume 5, Gerhard Fleischer d. J., Leipzig 1805, p. 65. ( online )
- Johann Christoph Adelung : Continuation and additions to Christian Gottlieb Jöcher's general scholarly lexico. Volume 2, Verlag Johann Friedrich Gelditsch, Leipzig 1887, Sp. 1735. ( online )
- Abraham Jacob van der Aa : Biographical Woordenboek der Nederlanden. Volume 8, part 1, Verlag JJ van Brederode, Haarlem, 1867, p. 85. ( online , Dutch)
- August Hirsch : Biographical lexicon of the outstanding doctors of all times and peoples. Urban & Schwarzenberg, Vienna / Leipzig 1886, p. 17.
- Ersch , Gruber : General Encyclopedia of Sciences and Arts . Section 2, Part 1, Johann Friedrich Gleditsch, Leipzig 1827, p. 184. ( online )
Web links
- Catalogus Professorum Academiae Rheno-Traiectinae
- Brief CV in the University Museum Utrecht ( Memento from February 22, 2013 in the web archive archive.today )
Individual evidence
- ^ Richard Thiele: Eva Lessing. A picture of life. Bookstore Waisenhaus, Halle Saale 1881, p. 4.
- ↑ Album Studiosorum Academiae Lugduno Batavae MDLXXV-MDCCCLXXV. Martin Nijhoff Verlag, The Hague 1885, p. 1012.
- ^ Philipp Christiaan Molhuysen : Album promotum Academiae Lugduno Batavae 1575-1812. Den Hag 1913-1924, p. 276.
- ↑ Holger Krahnke: The members of the Academy of Sciences in Göttingen 1751-2001 (= Treatises of the Academy of Sciences in Göttingen, Philological-Historical Class. Volume 3, Vol. 246 = Treatises of the Academy of Sciences in Göttingen, Mathematical-Physical Class. Episode 3, vol. 50). Vandenhoeck & Ruprecht, Göttingen 2001, ISBN 3-525-82516-1 , p. 101.
| personal data | |
|---|---|
| SURNAME | Hahn, Johann David |
| BRIEF DESCRIPTION | German physicist, philosopher, astronomer, physician, botanist and chemist |
| DATE OF BIRTH | July 9, 1729 |
| PLACE OF BIRTH | Heidelberg |
| DATE OF DEATH | March 9, 1784 |
| Place of death | Suffer |