Poinsot’s geometric interpretation of Earth’s polhode motion was still based on the assumption that the Earth was a completely rigid rotating body.
pˈɔɪnsɑːts dʒˌiːoʊmˈɛtɹɪk ɪntˌɜːpɹɪtˈeɪʃən ʌv ˈɜːθz pˈɑːlhoʊd mˈoʊʃən wʌz stˈɪl bˈeɪst ɔnðɪ ɐsˈʌmpʃən ðætðɪ ˈɜːθ wʌzɐ kəmplˈiːtli ɹˈɪdʒɪd ɹoʊtˈeɪɾɪŋ bˈɑːdi.