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Ptolemaeus

Arabus et Latinus

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Work C.1.6

Anonymous
Vatican Commentary on the Almagest

Text ‘(Vatican, BAV, Vat. lat. 3100) [book i] Quod perpendicularis cadens ex extremitate arcus super diametrum productam ex extremitate eius secunda sit sinus eius— (6v) sunt descripti super duos polos orbis equatoris diei. [book ii] Tractatus secundus libri almagesti. Hic queritur quare Ptolomeus hic distinctionem fecerit tractatus — (10v) quicquid est usque ad finem planum est. [book iii] Tractatus tertius. Postquam declaravimus etc. Vidimus oportunum esse ut illud — (20v) ad quod declarandum talem subicimus figuram. [book iv] Incipit dictio Almagesti quarta. Capitulum primum ex quibus considerationibus oporteat esse investigationem a Luna — (32r) scilicet sive agatur in eis secundum ecentricum sive secundum orbem revolutionis eadem invenitur proprotio in omnibus illis eclipsibus. [book v] Dictio quinta libri Almagesti. Capitulum 1 de artificio id est quomodo fiat instrumentum armillarum — (50r) ab orbe signorum cum Luna in altera. Aliud vero totum planum est. [book vi] Dictio sexta Almagesti tredecim continens capitula in hoc dictione intendit Ptolomeus tractare de eclipsibus — (63v) in qua sunt septem climata in secunda dictione Almagesti existit. [book vii] Dictio septima Almagesti et reliqua totum quod continetur in capitulis istis facile est — (66r) quia hoc dicit littera ista que stais facilis est. [book viii] In tabulis quas ego transtuli defuit tabula una — (70v) secundum viginti octo mansiones. [book viiii] Dictio nona in qua sunt undecimi capitula. In istis capitulis — (81r) id est in parte Piscis in qua fuit Sol totum quod sequitur usque ad finem capituli planum est. [book x] Dictio decima Almagesti in qua sunt decem capitula. Capitulum primum in declaratione etc. — (89v) ponit viginti nonem, totum vero quod sequitur usque ad finem huius capituli planum est et per se patet. [book xi] Dictio undecima libri Ptolomei qui dicitur Almagesti in qua sunt duodecim capitula. Capitulum primum etc. — (95v) scilicet totum angulum aek. Quod vero sequitur usque ad finem huius capituli planum est. Expleta est dictio undecima Almagesti. [book xii] Dictio Almagesti duodecima in qua sunt nonem capitula. Capitulum primum etc. — (100v) sic ibi ubi dicit: In stella autem Mercurii ponem causam alleu (?). [book xiii] Incipit dictio tertia decima. In hac dictione ponuntur undecim capitula — (108v) in eo dicendum finite sunt notule Almagesti. (Followed by what looks like extra notes on different parts of the Almagest: Sciendum est quod in secundo libro est quidam de proportionibus — (109r) que est in capitulo quarto libri tertiidecimi.’)

Content A commentary on the complete text of the Almagest in Gerard of Cremona’s translation. It also includes (I.12) a full commentary on Thebit Bencora’s De figura sectore.

Origin Anonymous. The text is prior to 1318, on which date Vatican, BAV, Vat. lat. 3100 was bought according to a note on f. 1r.

Bibl. H. Zepeda, The Medieval Latin Transmission of the Menelaus Theorem, PhD Dissertation, University of Oklahoma at Norman, 2013, 222-259.

Ed. --- except I.12-II.12 in Zepeda, 573-636 (from both MSS).

MSS

Madrid, BRAH, 97, s. XIV, f. 1r-138vImages

Vatican, BAV, Vat. lat. 3100, s. XIV, f. 1ra-109ra

Vatican, BAV, Vat. lat. 6795, s. XIV, f. 1ra-97vb