text_original: At first the yield of a tree is only about one half pound of rubber a year, and this increases so slowly that it is many years before it amounts to as much as ten pounds a year.
text_transcription: AT FIRST THE YIELD OF A TREE IS ONLY ABOUT ONE HALF POUND OF RUBBER A YEAR AND THIS INCREASES SO SLOWLY THAT IT IS MANY YEARS BEFORE IT AMOUNTS TO AS MUCH AS TEN POUNDS A YEAR
phonemes: æt fˈɜːst ðə jˈiːld əvə tɹˈiː ɪz ˈoʊnli ɐbˌaʊt wˈʌn hˈæf pˈaʊnd ʌv ɹˈʌbɚɹ ɐ jˈɪɹ, ænd ðɪs ɪŋkɹˈiːsᵻz sˌoʊ slˈoʊli ðˌɐɾɪt ɪz mˈɛni jˈɪɹz bᵻfˌɔːɹ ɪɾ ɐmˈaʊnts tʊ æz mˈʌtʃ æz tˈɛn pˈaʊndz ɐ jˈɪɹ.