hiː kɚɹˈɛktli mˈɛʒɚd ðə mˈæstətʃˈɑːɹdʒ ɹˈeɪʃɪˌoʊ ʌv ðiːz pˈɑːɹɾɪkəlz bˌʌt fˈeɪld tə tˈeɪk ðə fˈaɪnəl stˈɛp ænd ɛksplˈeɪn ðæt ðiːz pˈɑːɹɾɪkəlz wɜːɹ ɐ nˈuː tˈaɪp ʌv ˌɛlɪmˈɛntɚɹi pˈɑːɹɾɪkəl ðɪ ᵻlˈɛktɹɑːn.
He correctly measured the Mass-to-charge ratio of these particles but failed to take the final step and explain that these particles were a new type of elementary particle - the electron.