Wilhelm Theodor Oscar Casselmann

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Wilhelm Theodor Oscar Casselmann (born August 1, 1820 in Rinteln , † February 15, 1872 in Wiesbaden ) was a high school teacher and member of the state parliament of the Duchy of Nassau .

Life

His father was the higher court director and government secretary Alexander Philipp Casselmann (born November 22, 1785 - † December 8, 1854) and his grandfather the criminal judge Philipp Ludwig Casselmann.

After visiting the school in Rinteln he studied 1839-1843 mathematics and science at the universities of Berlin, Göttingen and Marburg with Robert Bunsen , where he in August 1843 with the work over the galvanic zinc carbon chain to Dr. phil. PhD. He researched coal arc lamps and reported in Poggendorfs Annalen in 1844 that soaking the coals with various solutions, e.g. B. with boric acid solution , calm the arc. A volatile substance also significantly reduces the voltage to be applied. After he had also passed the exam as a high school teacher, he was both a private lecturer in physics, meteorology and technology at the University of Marburg, and a teacher of mathematics, physics and chemistry at the local high school. From Easter 1846 he taught chemistry at the newly founded Realgymnasium in Wiesbaden, from 1863 as a professor.

He also taught at the Nassau Military Academy and made contributions to the galvanic zinc-carbon chain. From 1866 he reported in the journal for analytical chemistry published by Carl Remigius Fresenius on the advances in inorganic chemistry.

Publications

  • Guide to Teaching Science in Chemistry (2 Courses, 1847–50)
  • Chemical investigation of the brown coals of the Westerwald (1853)
  • About some light phenomena observed in the circle of the coal-zinc chain. In: Annalen der Physik , Volume 139 (1844), pp. 576-593

literature

  • Karl Karmarsch:  Casselmann, Wilhelm Theodor Oscar . In: Allgemeine Deutsche Biographie (ADB). Volume 4, Duncker & Humblot, Leipzig 1876, p. 61 f.
  • Jochen Lengemann : MdL Hessen. 1808-1996. Biographical index (= political and parliamentary history of the state of Hesse. Vol. 14 = publications of the Historical Commission for Hesse. Vol. 48, 7). Elwert, Marburg 1996, ISBN 3-7708-1071-6 , p. 97.
  • Nassau parliamentarians. Part 1: Cornelia Rösner: The Landtag of the Duchy of Nassau 1818–1866 (= publications of the Historical Commission for Nassau. Vol. 59 = Prehistory and history of parliamentarism in Hesse. Vol. 16). Historical Commission for Nassau, Wiesbaden 1997, ISBN 3-930221-00-4 , No. 34.

Web links

Wikisource: Wilhelm Theodor Oscar Casselmann  - Sources and full texts

Individual evidence

  1. ^ Cornelia Rösner: Nassau parliamentarians: a biographical handbook . Volume 59, Part 1: The Diet of the Duchy of Nassau 1818–1866 . Wiesbaden 1997, p. 28
  2. ^ W. Th. Casselmann: About the galvanic carbon zinc chain and some observations made with it. Marburg 1843 full text in the Google book search
  3. ^ Rudolf Herzfeld: About the electric coal arc. In: Annalen der Physik, Volume 298 (1897), pp. 435-449 doi: 10.1002 / andp.18972981107
  4. ↑ Ernst Voit: The electric arc. In: Collection of Electrotechnical Lectures. Volume 1. Edited by Ernst Voit. Stuttgart 1899, p. 3, archive.org
personal data
SURNAME Casselmann, Wilhelm Theodor Oscar
ALTERNATIVE NAMES Casselmann, Theodor Wilhelm
BRIEF DESCRIPTION German chemist
DATE OF BIRTH August 1, 1820
PLACE OF BIRTH Rinteln
DATE OF DEATH February 15, 1872
Place of death Wiesbaden