(1983), De multiplicatione specierum and De speculis comburentibus, in David C. Lindberg, ed., Roger Bacon’s Philosophy of Nature:
mˈil nˈɔvɨsˈeɪŋtuʒˌi oɪtˈeɪŋtɐitɹˈeʃ, dɨ mˌuwtiplˌikɐtiˈonɨ spˌesiɨɾˈũŋ ˈɐ̃ŋd dɨ spˌekulˈiʃ kˌumbuɾˌeɪŋtibˈuʃ, ˈin dɐvˈid sˈe. liŋdbˈeɾəɡ, ˈed., ʁuʒˈeɹ bɐkˈoŋʃ fˌiluzˈofi ˈɔf nˌɐtˈuɾɨ: