vˈækjuːm pˈaʊɚ vˈaɪəɹ ɐ pˈaɪp wʌz jˈuːzd fɚðɪ ɐsˈɛnt tə dˈælki, spˈiːdz ʌv ˌʌp tə bˌiːɪŋ ɐtʃˈiːvd, ænd ðə ɹᵻtˈɜːn dʒˈɜːni wʌz baɪ mˈiːnz ʌv ɡɹˈævᵻɾi.
Vacuum power via a  pipe was used for the ascent to Dalkey, speeds of up to  being achieved, and the return journey was by means of gravity.