Project icon: lavishly furnished initial letter with a painting of Ptolemy using an astrolab.

Ptolemaeus

Arabus et Latinus

_ (the underscore) is the placeholder for exactly one character.
% (the percent sign) is the placeholder for no, one or more than one character.

At the beginning and at the end, these placeholders are superfluous.

Vatican, Biblioteca Apostolica Vaticana, Reg. lat. 1904

s. XV-XVI.

Paper, 103 f., fours hands (I: f. 1-56; II: f. 57-70r and 86-102; III: f. 70v-83v; IV: 84v and 85r).

Astronomy and mathematics: Ptolemaica (1r-56r and 57r-61r); ‘Kardaga est porcio circuli ex 15 gradibus…’ (61r-62v); Thebit Bencora, De figura sectore, anonymous tr. (62v-70r); Jordanus of Nemore, Elementa super demonstrationem ponderum (70v-73r); Liber de canonio (73v-76v); fragment on the Roman balance ‘Queritur in longitudine…’, attr. Thebit (76v-77r); Pseudo-Euclid, De ponderoso et levi (77r-78r); Pseudo-Thebit Bencora, De motu octave spere (79r-83v); ‘Data elevationis (?) cum instrumento ab orizonte… Esto meridianus circulus abcd…’ (84v); ‘Nota quod habita notitia arcus diei et altitudinis Solis…’ (85r); Euclid, Elementa, tr. Gerard of Cremona, excerpts XV.1-5 and XIII.16 (86r-90r); John of Ligneres, Canones primi mobilis (91r-102v). Blank: 56v, 78v, 84r, 85v, 90v, 103.

Lit.

---

1r‑56r

‘Diffinitio tractatus tertii Iohannis de Blanchinis de Bononia. Si duo numeri ad invicem multiplicentur et productum per primum multiplicantem — et aggregati radix diminuta medietate arborum valet res.’

= Giovanni Bianchini, Flores Almagesti (C.1.16)

. III, 1r-12r; IV, 12r-17r; V, 17v-37v; I, 38r-52r; II, 52v-56r. A few marginal notes by the scribe.

57r‑61r

‘Incipit liber primus Thebith de his que indigent expositione antequam legitur Almagesti. <E>quator diei est circulus maior qui describitur super duos polos orbis ― aut propinqui oppositioni erunt retrogradi. Explicit Thebith filii Chorae de his quae indigent expositione antequam legatur Almagesti.’