text_original: After having ascertained the quantity of silica, and of earths, and metallic oxides, which the mineral con  tained, his last process to determine the potash in it was conducted in this way : A portion of the mineral leduced to a fine po\Mer was mixed with four or five times its weight of carbonate of barytes, and kept for some time (in a platinum crucible) in a red heat. By this process, the whole becomes soluble in muriatic acid.
text_transcription: AFTER HAVING ASCERTAINED THE QUANTITY OF SILICA AND OF EARTHS AND METALLIC OXIDES WHICH THE MINERAL CONTAINED HIS LAST PROCESS TO DETERMINE THE POTASH IN IT WAS CONDUCTED IN THIS WAY A PORTION OF THE MINERAL REDUCED TO A FINE POWDER WAS MIXED WITH FOUR OR FIVE TIMES ITS WEIGHT OF CARBONATE OF BAREITES AND KEPT FOR SOME TIME IN A PLATINUM CRUCIBLE IN A RED HEAT BY THIS PROCESS THE WHOLE BECOMES SOLUBLE IN MYRIADIC ACID
phonemes: ˈæftɚ hˌævɪŋ ˌæsɚtˈeɪnd ðə kwˈɔntᵻɾi ʌv sˈɪlɪkə, ænd ʌv ˈɜːθs, ænd mətˈælɪk ˈɑːksaɪdz, wˌɪtʃ ðə mˈɪnɚɹəl kˈɑːn tˈeɪnd, hɪz lˈæst pɹˈɑːsɛs tə dɪtˈɜːmɪn ðə pˈɑːɾæʃ ɪn ɪt wʌz kəndˈʌktᵻd ɪn ðɪs wˈeɪ : ɐ pˈɔːɹʃən ʌvðə mˈɪnɚɹəl lˈɛdʒuːst tʊ ɐ fˈaɪn pˈoʊ bˈækslæʃ mˈɜː wʌz mˈɪkst wɪð fˈɔːɹ ɔːɹ fˈaɪv tˈaɪmz ɪts wˈeɪt ʌv kˈɑːɹbənˌeɪt ʌv bˈæɹaɪts, ænd kˈɛpt fɔːɹ sˌʌm tˈaɪm (ɪn ɐ plˈætɪnəm kɹˈuːsᵻbəl) ɪn ɐ ɹˈɛd hˈiːt. baɪ ðɪs pɹˈɑːsɛs, ðə hˈoʊl bɪkˌʌmz sˈɑːljuːbəl ɪn mjˌʊɹɹɪˈæɾɪk ˈæsɪd.