Decem tractatus astronomiae (BL, Arundel MS 66)

The divisions and order of treatises in Arundel MS 66 differ from the tradition that informed the first printed editions: the Decem tractatus Astronomiae (Erhard Ratdolt, Venice, 1491) and Guidonis Bonati Forliviensis Mathematici de astronomia tractatus X (Basel, 1550).

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Gothic hybrid

Parchment

Table of contents: ff. 48r-52r

Decem tractatus astronomiae : ff. 53r-248v
ff. 53r-57r: Tractatus primus 'Ad ostendendum utilitatis quas possumus sequi de astronomia.'
ff. 57r-65r: Tractatus secundus 'De divisione orbis signorum.'
ff. 65r-73v: Tractatus secundus, 3rd part (here: Tractatus tertius).
ff. 73v-80r: Tractatus tertius, 1st part 'De naturis septem planetarum' (here: Tractatus quartus).
ff. 80v-85v: Tractatus tertius, 2nd part (here: Tractatus quintus).
ff. 86r-88r: Tractatus quartus 'De consideratione quarundam coniunctionum' (here: Tractatus sextus).
ff. 89r-128v: Tractatus sextus 'Super iudiciis astrorum'.
ff. 129r-147v: Tractatus septimus 'De electionibus' in two parts: 'Tractatus de electionibus primo universaliter' (129r-137r), and 'tractatus 2 de electionibus particularibus' (ff. 137r-143v); imperfect; includes an extract from Haly ibn Ragel [‘Ali ibn abi ’r-Rijal], De iudiciis astrorum (ff. 143v-147v).
ff. 148r-186v: Tractatus nonus 'De nativitatibus' in 4 parts.
ff. 187r-200v: Tractatus quintus 'De considerationibus.'
ff. 201r-243v: Tractatus optimus 'De revolutionibus annorum mundi' in 2 parts.
ff. 243v-248r: Tractatus decimus 'Tractatus de imbribus et aeris'.

Latin

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