text_original: I have some  times suspected that his reagents were not always Tery pure ; but I believe the true reason of the un  PROGRESa OF ANALYTICAL CREMISTRT. 213 ^tisfactory nature of many of his analyses, is the :li&d choice made of the specimens selected for ana  lyeia.
text_transcription: I HAVE SOMETIMES SUSPECTED THAT HIS REAGENTS WERE NOT ALWAYS VERY PURE BUT I BELIEVE THE TRUE REASON OF THE UNSATISFACTORY NATURE OF MANY OF HIS ANALYSES IS THE BAD CHOICE MADE OF THE SPECIMENS SELECTED FOR ANALYSIS
phonemes: aɪ hæv sˌʌm tˈaɪmz səspˈɛktᵻd ðæt hɪz ɹɪˈeɪdʒənts wɜː nˌɑːt ˈɔːlweɪz tˈɜːɹi pjˈʊɹ ; bˌʌt aɪ bᵻlˈiːv ðə tɹˈuː ɹˈiːzən ʌvðɪ ˈʌn pɹəɡɹˈɛsə ʌv ˌænɐlˈɪɾɪkəl kɹˈɛmɪstət. tˈuːhˈʌndɹɪd θˈɜːtiːn tɪsfˈæktɚɹi nˈeɪtʃɚɹ ʌv mˈɛnɪəv hɪz ɐnˈæləsˌiːz, ɪz ðə :lˈaɪ ænd dˈiː tʃˈɔɪs mˌeɪd ʌvðə spˈɛsɪmənz sᵻlˈɛktᵻd fɔːɹ ˈɑːnə lˈaɪeɪə.