hiː dᵻskɹˈaɪbz vˈɛntᵻlˌeɪɾɪŋ məʃˈiːnz ɪn diːtˈeɪl, ɪŋklˈuːdɪŋ ɐ kˈuːlɪŋ sˈɪstəm jˈuːzɪŋ sˌʌbtɪɹˈeɪniən tˈuːbz ænd ðə ɹᵻfɹˈɪdʒɚɹˌeɪɾɚ hɪz ˈoʊn ɪnvˈɛnʃən, ænd bˈeɪst ˌɔn ɪvˈæpɹətˌɪv kˈuːlɪŋ.
He describes ventilating machines in detail, including a cooling system using subterranean tubes and the Refrigerator (his own invention), and based on evaporative cooling.