Friedrich Ernst Dorn

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Friedrich Ernst Dorn

Friedrich Ernst Dorn (born July 27, 1848 in Guttstadt , Warmia , † December 6, 1916 in Halle (Saale) ) was a German physicist.

life and work

Friedrich Ernst Dorn was the son of the pharmacist Adolf Hermann Dorn and his wife Johanna Wilhelmine geb. Lottermoser. Friedrich Ernst Dorn was married to Anna geb. Hertz.

Dorn went to high school in Königsberg from 1857 to 1865 and studied mathematics, natural sciences, philosophy and French at the University of Königsberg from 1865 to 1869 . In 1869 he passed the teaching examinations for grammar schools. After probationary years at his old grammar school in Königsberg and in Berlin, he became an assistant teacher at the Royal Wilhelmsgymnasium in Berlin in 1871, while at the same time he was doing his doctorate in mathematics in Königsberg (subject was the transformation of elliptical integrals).

In 1873 he completed his habilitation in mathematics and physics at the University of Greifswald . Also in 1873 he became an associate professor at the University of Breslau and then from 1881 as a full professor at the TH Darmstadt .

In 1885, Dorn became a full professor of experimental physics at the University of Halle as the successor to Anton Oberbeck (1846–1900). In 1895 he succeeded Hermann Knoblauch as director of the Physics Institute at the University of Halle.

Dorn dealt with the then current research areas of radioactivity and X-rays as well as liquid crystals . In 1900 he discovered the radioactive gas radon . He was studying the decay of radium into mass particles when he discovered the radioactive gas. He gave it the name Radium Emanation ("out of radium"). Furthermore, he devoted himself to the precision determination of electrical units of measurement and examined atmospheric electricity with instruments he had developed. He made himself unpopular in the city because he felt hindered in his precision experiments by the electric tram in Halle and wanted to ban it.

In 1895 he became a member of the German Academy of Sciences Leopoldina . He received several high orders of merit such as the Knight's Cross First Class of the Order of Merit of St. Michael . Furthermore, on December 20, 1906, Dorn was appointed a secret councilor.

Manuscripts by Dorn can be found at the Berlin State Library in the Manuscript Department and at the Göttingen State and University Library .

Works

  • Form and number of representatives of non-equivalent classes of the transformation of the ultra-elliptical functions , habilitation thesis, Greifswald 1873
  • Apparatus for the investigation of atmospheric electricity , 1886
  • Proposals for legal provisions on electrical units of measurement: designed by the Curatorium of the Physikalisch-Technische Reichsanstalt; together with a critical report on the probable value of the ohm according to previous measurements. Berlin: Springer, 1893.

literature

  • Who is it , 1909
  • Halle's Academic Vademecum , 1910
  • German Biographical Yearbook , transition volume I 1914–1916, list of deaths 1916
  • Christian Krollmann (Ed.): Old Prussian Biography , Volume 1, 1941
  • A. Wigand: Ernst Dorn . In: Physikalische Zeitschrift . 17, 1916, p. 299.

Web links

Remarks

  1. ↑ Date of death December 6, 1916 according to the GND created by the Kalliope association . After Dorn, Friedrich Ernst. Hessian biography. (As of February 16, 2013). In: Landesgeschichtliches Informationssystem Hessen (LAGIS). June 13, 1916.
  2. ↑ Entry on Friedrich Ernst Dorn in Kalliope .
personal data
SURNAME Dorn, Friedrich Ernst
BRIEF DESCRIPTION German physicist
DATE OF BIRTH July 27, 1848
PLACE OF BIRTH Guttstadt
DATE OF DEATH December 6, 1916
Place of death Halle (Saale)