Wilhelm Heinrich Heraeus—Doctoral Student at the University Frankfurt

AbstractWilhelm Heinrich Heraeus (*1900 – †1985), the founder of the Wilhelm and Else Heraeus Foundation, wrote his doctoral thesis at the University of Frankfurt in 1922–23 under the supervision of Richard Wachsmuth and Walther Gerlach. Thereby, he became a witness of the Stern-Gerlach experiment, completed in Frankfurt in 1922. In his thesis, Heraeus investigated “The dependence of the thermoelectrical force of iron on its structure” and was able to show that earlier measurements by G. Borelius were incorrect and irreproducible. On 23 July 1923, Heraeus passed his doctoral examination in Frankfurt under Wachsmuth’s auspices.