dˈʊɹɹɪŋ ðə mˈɪd nˈaɪntiːnθ sˈɛntʃɚɹi, lˈuːi pˈɔɪnsɑːt dɪvˈɛləpt ɐ dʒˌiːoʊmˈɛtɹɪk ɪntˌɜːpɹɪtˈeɪʃən ʌvðə fˈɪzɪks ʌv ɹoʊtˈeɪɾɪŋ bˈɑːdiz ðæt pɹəvˈaɪdᵻd ɐ vˈɪʒuːəl kˈaʊntɚpˌɑːɹt tʊ ˈɔɪlɚz ˌældʒɪbɹˈeɪɪk ᵻkwˈeɪʒənz.
During the mid 19th century, Louis Poinsot developed a geometric interpretation of the physics of rotating bodies that provided a visual counterpart to Euler’s algebraic equations.