In 1917, Rutherford succeeded in generating hydrogen nuclei from a nuclear reaction between alpha particles and nitrogen gas, and believed he had proven Prout's law.
ɪn nˈaɪntiːnhˈʌndɹɪd sˈɛvəntˌiːn, ɹˈʌðɚfɚd səksˈiːdᵻd ɪn dʒˈɛnɚɹˌeɪɾɪŋ hˈaɪdɹədʒən nˈuːklɪi fɹʌm ɐ nˈuːklɪɹ ɹɪˈækʃən bᵻtwˌiːn ˈælfə pˈɑːɹɾɪkəlz ænd nˈaɪtɹədʒən ɡˈæs, ænd bᵻlˈiːvd hiː hæd pɹˈuːvən pɹˈaʊts lˈɔː.