hiː pˈɔɪnts ˈaʊt ðætðə hˈɪstɚɹi ʌv sˈaɪəns hɐz sˈiːn mˈɛni pˈɑːzɪts ðæt wɜː kənsˈɪdɚd æz ɹˈiːəl ˈɛntᵻɾiz: sˈʌtʃ ɐz flˈɑːdʒɪstən; kælˈɔːɹɪk; ðə lˌuːmɪnˈɪfɚɹəs ˈiːθɚ; ænd vˈaɪɾəl fˈoːɹsᵻz ðæt wɜː ðˈʌs ᵻlˈɪmᵻnˌeɪɾᵻd.
He points out that the history of science has seen many posits that were considered as real entities: such as phlogiston; caloric; the luminiferous ether; and vital forces that were thus eliminated.