text_original: This was an improvement of considerable import  ance. All those stony minerals which contain a notable proportion of silica, in general become solu~ ble after having been kept for some time in a state of ignition with twice their weight of carbonate of soda.
text_transcription: THIS WAS AN IMPROVEMENT OF CONSIDERABLE IMPORTANCE ALL THOSE STONY MINERALS WHICH CONTAIN A NOTABLE PROPORTION OF SILICA IN GENERAL BECOMES SOLUBLE AFTER HAVING BEEN KEPT FOR SOME TIME IN A STATE OF IGNITION WITH TWICE THEIR WEIGHT OF CARBONATE OF SODA
phonemes: ðɪs wʌz ɐn ɪmpɹˈuːvmənt ʌv kənsˈɪdɚɹəbəl ɪmpˈɔːɹt ˈæns. ˈɔːl ðoʊz stˈoʊni mˈɪnɚɹəlz wˌɪtʃ kəntˈeɪn ɐ nˈoʊɾəbəl pɹəpˈɔːɹʃən ʌv sˈɪlɪkə, ɪn dʒˈɛnɚɹəl bɪkˌʌm sˈɑːluː tˈɪldə blˈiː ˈæftɚ hˌævɪŋ bˌɪn kˈɛpt fɔːɹ sˌʌm tˈaɪm ɪn ɐ stˈeɪt ʌv ɪɡnˈɪʃən wɪð twˈaɪs ðɛɹ wˈeɪt ʌv kˈɑːɹbənˌeɪt ʌv sˈoʊdə.