These were the foundations that one of Wiechert's students, Beno Gutenberg, used to discover the three-layered Earth in 1914.
ðiːz wɜː ðə faʊndˈeɪʃənz ðˈætwˌʌn ʌv wˈaɪtʃɚts stˈuːdənts, bᵻnˈoʊ ɡjˈuːtənbˌɜːɡ, jˈuːzd tə dɪskˈʌvɚ ðə θɹˈiːlˈeɪɚd ˈɜːθ ɪn nˈaɪntiːnhˈʌndɹɪd fˈoːɹtiːn.