text_original: Expose the writing to the vapour of sulphuret of ammonia, or dip it into a solution of the sulphuret.
text_transcription: EXPOSE THE WRITING TO THE VAPOR OF SULPHURET OF AMMONIA OR DIP IT IN A SOLUTION OF THE SULPHURET
phonemes: ɛkspˈoʊz ðə ɹˈaɪɾɪŋ tə ðə vˈeɪpɚɹ ʌv sˈʌlfjʊɹɹət ʌv æmˈoʊniə, ɔːɹ dˈɪp ɪɾ ˌɪntʊ ɐ səlˈuːʃən ʌvðə sˈʌlfjʊɹɹət.