ˈæftɚwɚd, hiː bɪkˌeɪm pɹəfˈɛsɚɹ ɪn ɹˈɑːstɑːk nˈaɪntiːnhˈʌndɹɪd, ˈɜːlændʒən nˈaɪntiːnhˈʌndɹɪd θɹˈiː, wˈuːəzbˌɜːɡ nˈaɪntiːnhˈʌndɹɪd θˈɜːtiːn ænd ᵻvˈɛntʃuːəli ðə jˌuːnɪvˈɜːsᵻɾi ʌv ɡˈɜːtɪndʒən nˈaɪntiːnhˈʌndɹɪd nˈaɪntiːn.
Afterward, he became professor in Rostock (1900), Erlangen (1903), Würzburg (1913) and eventually the University of Göttingen (1919).