Wilhelm Ludwig Jaeger

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Wilhelm Ludwig Jaeger (born January 26, 1862 in Frankfurt am Main , † May 18, 1937 in Berlin ) was a German physicist.

Jaeger was the son of a businessman and studied mathematics, physics and chemistry in Heidelberg from 1882 and then in Berlin. His teachers included Robert Bunsen in Heidelberg and Hermann von Helmholtz . In 1887 he received his doctorate in Berlin ( on the speed of sound in vapors and the determination of vapor density ) and then went to the Physikalisch-Technische Reichsanstalt. There he became a member in 1892, a professor in 1897, a secret councilor in 1908 and a senior councilor in 1920. From 1905 to 1920 he was also a non-permanent member of the patent office.

He dealt in particular with precision measurements of the electrical base units, first of the resistance (unit ohm), for which he was able to reduce the measurement uncertainty by ten times, then of the voltage (with the Weston standard element ) and of the current. He examined electrical oscillation processes, dealt with galvanometers and heat conduction in metals (with Hermann Dießelhorst ), with calorimetry and thermometers. Various chapters in the Physics Handbook by Geiger / Scheel originate from him .

He was married and had two sons, of whom Robert Jaeger also became a physics professor and Willy Ludwig Jaeger was an organist, pianist and church musician.

He also translated physics books from French, such as the physics textbook by Jules Violle and lectures by Henri Poincaré (1891/2 with Ernst Gumlich ).

Fonts

  • Werner von Siemens , Stuttgart: Ulshöfer 1906
  • The emergence of the international dimensions of electrical engineering , Springer Verlag 1932
  • The normal elements and their application in electrical measurement technology , 1902
  • Electrical measurement technology. Theory and practice of electrical and magnetic measurements , 1917, 3rd edition, Leipzig: Barth 1928

literature

personal data
SURNAME Jaeger, Wilhelm Ludwig
BRIEF DESCRIPTION German physicist
DATE OF BIRTH January 26, 1862
PLACE OF BIRTH Frankfurt am Main
DATE OF DEATH May 18, 1937
Place of death Berlin