Ernst Esselbach

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Ernst Theodor Grotjahn Esselbach (born September 12, 1832 in Schleswig , † February 6, 1864 at the sea cave in the Arabian Sea off Gwadar , Pakistan ) was a German physicist.

Life and work

Ernst Esselbach, son of the restaurateur Doris Esselbach .

He attended elementary school in Altona and high school in Hamburg. In the summer semester of 1852 he matriculated at the University of Kiel as a student in the philosophical faculty. After a year he moved to the University of Göttingen , where he became a member of the Hannovera fraternity . In the summer semester of 1855 he moved to the University of Königsberg and assisted Hermann von Helmholtz . In 1857 he returned to Kiel, where he was promoted to Dr. phil. PhD.

In the winter of 1857/58 he was the private tutor of the son of the Duke of Orléans in London for half a year . In 1858 he joined the Siemens and Halske telegraph construction company in Berlin. Werner von Siemens sent him to the London branch some time later. There he worked on the technical improvement of submarine cables . He then entered service in the UK and took part in the laying of submarine cables to India with the title of “Chief Superintendent”. On February 6, 1864, Ernst Esselbach jumped overboard in a maddened fever and drowned about 180 miles west of the port of Gwadar (Pakistan).

Publications

  • By measuring the wavelength of ultraviolet light. In: Reports on the negotiations of the Royal Prussian Academy of Sciences in Berlin from 1855, p. 757-760, with an addition on the physiological-optical results of this study by Hermann von Helmholtz, pp. 760-761.
  • On the applicability of Talbot's lines as a means of measuring optical constants with reference to Airy's theory of the same. In: Poggendorff, Annalen der Physik und Chemie. Volume 98, 1856, pp. 527-541.
  • Measurement of the refraction exponents of the ordinary ray in quartz. In: Poggendorff, Annalen der Physik und Chemie. Volume 98, 1856, pp. 541-546.
  • About the line resistance of some submarine cables. In: Journal of the German-Austrian Telegraph Association. 1859, pp. 109-110.
  • Duration of Fluorescence (over the duration of the fluorescence). In: Report of the British Association for the Advancement of Science. 1862, p. 1.
  • Experimental Determination of the Absolute Quantity of the Electrical Charge of Condensors (experimental determination of the absolute quantity of electrical charge on condensers). In: Report of the British Association for the Advancement of Science. 1862.

literature

  • Johann Christian Poggendorff : Concise dictionary for the history of the exact sciences . tape 1 . Publisher by Johann Ambrosius Barth, Leipzig 1863, DNB  560792514 , p. 685 .
  • W. Barentin: Name and subject register on the advances in physics . Georg Reimer, Leipzig 1872, p. 83 .
  • Berend Wilhelm Feddersen , JA von Öttinger: Biographical-literary concise dictionary of the exact natural sciences . tape 3 . Johann Ambrosius Barth, Leipzig, DNB  367611724 , p. 413 .
  • Thomas Otto Achelis: Register of the Schleswig students 1517–1864 . Gads, Copenhagen, DNB  560308256 .
  • Kenneth L. Caneva: The Form and Function of Scientific Discoveries . Smithsonian Institution Libraries, Washington, DC November 16, 2000, OCLC 623186913 (English).

Individual evidence

  1. ^ Henning Tegtmeyer : Directory of members of the fraternity of Hannovera Göttingen, 1848–1998 , page 18
personal data
SURNAME Esselbach, Ernst
ALTERNATIVE NAMES Esselbach, Ernst Theodor Grotjahn (full name)
BRIEF DESCRIPTION German physicist
DATE OF BIRTH September 12, 1832
PLACE OF BIRTH Schleswig
DATE OF DEATH February 6, 1864
Place of death Arabian Sea