ɪn wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd ˈeɪɾi hiː wʌz ɐwˈɔːɹdᵻd hɪz pˌiːˈeɪtʃ.dˈiː. fɹʌm hˈʌmboʊldtjˈuːnɪvɚsˌɪɾɛt ʌv bɜːlˈɪn wɪð ɐ dɪsɚtˈeɪʃən tˈaɪɾəld, ˈuːbɚ dˈɛn ˈaɪnflʌs vˈɑːn lˈʌftdɹʌk ˈʌnd wˈɛəm ˈɔːf dˈaɪ pˈɛndɪlbjˌuːɪɡˌʌŋ ɔnðɪ ˈɪnfluːəns ʌv ˈɛɹ pɹˈɛʃɚ ænd hˈiːt ɔnðə mˈuːvmənt əvə pˈɛndʒuːləm.
In 1880 he was awarded his Ph.D. from Humboldt-Universität of Berlin with a dissertation titled, Über den Einfluss von Luftdruck und Wärme auf die Pendelbewegung (On the influence of air pressure and heat on the movement of a pendulum).