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Ptolemaeus Arabus et Latinus

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Florence, Biblioteca Medicea Laurenziana, Conv. Soppr. 414

s. XIIIex-XIVin (14th c. acc. Crociani et al., but the year 1304 is given as the ‘present year’ in a gloss on f. 60r (ed. below); the year 1263 is also given as the present year in a long note added f. 63v (‘… aliquando etiam fiet equinoctium Sole existente in 21 gradu Piscis ut nunc, anno domini M°.200.63 …’), but this note might have been added later as a historical record of the date of the spring equinox for future reference).

Or.:

most probably Paris, as f. 1-60r were copied on MS Paris, BnF, lat. 16657 (see), f. 82v-146v, a MS which was at the college of Sorbonne since 1272.

Prov.:

Florence, basilica della Santissima Annunziata.

Parchment, 63 f., a single hand.

Astronomy and algebra: Ptolemaica (1r-45r and 46r-60r); two diagrams and a note on retrogradation ‘Nota: p est centrum terre, o centrum ecentrici deferentis…’ (45v); Liber restauracionis ‘Unitas est principium numeri et non est numerus…’ (60va-63vb).

Lit.

L. Crociani, M. G. Ciardi Dupré Dal Pogetto, D. Liscia Bemporad, I codici della basilica della SS. Annunziata in Firenze nella Biblioteca Medicea Laurenziana, Firenze, 1983, 117-118 (no. 82); H. Zepeda, The First Latin Treatise on Ptolemy’s Astronomy: The Almagesti minor (c. 1200), Turnhout, 2018, 56-57; M. Moyon, ‘The Liber Restauracionis: A Newly Discovered Copy of a Mediaeval Algebra in Florence’, Historia Mathematica 46 (2019), 1-37: 4-5.

1r‑45r

‘Incipit liber Albategni qui dicitur Almagesti parvum [title in upper margin by a later hand]. Omnium recte philosophancium non solum verisimilibus et credibilibus tenebrarum sic se habent. Explicit hic sextus liber et sexti glosa textus.’

= Almagesti minor (C.1.4). Occasional short marginal notes.

46r‑60r

‘Tabula stellarum fixarum secundum quod sunt semper in ymaginibus signorum. Stellatio Urse Minoris. Illa que est super extremitatem caude: 2s 7° 15’ – 66° 0’ – 3. Illa que est post istam super caudam: 2s 9° 35’ – 70° 0’ – 4 — chaugebe dicuntur comate.’

= Ptolemy, Almagesti (tr. Gerard of Cremona) (A.1.2), VII.5-VIII.1, star catalogue, with longitudes adjusted +7°05’ (same in Paris, BnF, lat. 16657). The same or another hand later added the coordinates from the Alfonsine tables (2s 17° 18’, 2s 19° 38’, etc.), as well as glosses, including the following one at the end (60r): ‘Notandum quod super tabulas hic positas ab antiquo addunt nove tabule Alfunsi 10 gradus et 3 minuta. Sed anno domini 1304 addebantur ad hoc 23 minuta. Et antique tabule hic posite addunt super tabulas Ptholomei in Almagesti de stellis fixis 0 signum 7 gradus 5 minuta, ita quod tempus presentis anni, scilicet 1304, addit super tempus Ptholomei 0 signum, 17 gradus, 8 minuta’. The date 1304 is confirmed by another gloss on the same page, that speaks of 1185 years since Ptolemy’s epoch of 118 (!) A.D. The first gloss turns out to be the earliest mention of the Alfonsine tables.