text_original: But when the quantity of silica is small, or when it is totally absent, heating with carbonate of soda does not answer so well. With such minerals, caustic potash or soda m&y be substituted with ad  PBOG&E&S OF AVAJLTTICAI* CHZMISTRT. 201 mmtage ; and there are some of them that cannot be voalyz^ without having recourse to that agent.
text_transcription: BUT WHEN THE QUANTITY OF SILICA IS SMALL OR WHEN IT IS TOTALLY ABSENT HEATING WITH CARBONATE OF SODA DOES NOT ANSWER SO WELL WITH SUCH MINERALS CAUSTIC POTASH OR SODA MAY BE SUBSTITUTED WITH ADVANTAGE AND THERE ARE SOME OF THEM THAT CANNOT BE ANALYZED WITHOUT HAVING RECOURSE TO THAT AGENT
phonemes: bˌʌt wɛn ðə kwˈɔntᵻɾi ʌv sˈɪlɪkə ɪz smˈɔːl, ɔːɹ wɛn ɪɾ ɪz tˈoʊɾəli ˈæbsənt, hˈiːɾɪŋ wɪð kˈɑːɹbənˌeɪt ʌv sˈoʊdə dʌznˌɑːt ˈænsɚ sˌoʊ wˈɛl. wɪð sˈʌtʃ mˈɪnɚɹəlz, kˈɔːstɪk pˈɑːɾæʃ ɔːɹ sˈoʊdə ˈɛm ænd wˈaɪ biː sˈʌbstɪtˌuːɾᵻd wɪð ˈæd pˈiːbˈɑːɡ ænd ˈiː ænd ˈɛs ʌv ˈævɐdʒltˌɪkaɪ ˈæstɚɹˌɪsk sˌiːˌeɪtʃzˈiːmˈɪstət. tˈuːhˈʌndɹɪd wˈʌn ˌɛmˈɛmtˈeɪdʒ ; ænd ðɛɹˌɑːɹ sˌʌm ʌv ðˌɛm ðæt kænˈɑːt biː vˈoʊlɪz wɪðˌaʊt hˌævɪŋ ɹᵻkˈɔːɹs tə ðæt ˈeɪdʒənt.