Nuovi frammenti dei trattati di Dietrich di Freiberg nelle biblioteche di Berlino, Heidelberg, Londra e Utopia

In this paper, three fragments of Dietrich of Freiberg's treatises are reported and analyzed from a philological point of view. The first one, Staatsbibliothek zu Berlin - Preußischer Kulturbesitz, Fragm. var. 397A, attests about 6000 words of the questions Utrum in deo sit aliqua vis cognitiva inferior intellectu (final part), Utrum corpus Christi vivum et mortuum fuerit idem numero (initial part), and of the treatises De tempore (final part) and De mensuris durationis entium (initial part). The second fragment, Universitätsbibliothek Heidelberg, Cod. XIV, 35, attests about 2400 words from the first redaction of De iride and the reconstruction of the figures of Berthold of Moosburg to the third book of Aristotle’s Meteorologica. The third fragment, London, Private Collection, attests about 1100 words from the second redaction of De iride. Finally, a new complete manuscript of De iride, formerly in Shirburn Castle, Macclesfield Library, Cod. 182.C.29 and currently in a private library not accessible for consultation, is reported and classified. From the complex of these findings emerges a good number of important textual variants and a hitherto unsuspected diffusion of Dietrich's scientific treatises.