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Ptolemaeus Arabus et Latinus

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Work C.3.20

Pseudo-Giovanni Pontano
Expositio in verbum 51 Centiloquii Ptholomei


‘(Vienna, ÖNB, 5503) Ioviani Pontani expositio in verbum 51 Centiloquii Ptholomei. Circulum geniture in exitu nati ab utero secundum verbum 51 sic extrahitur. Primum ad tempus datum inveniatur locus Solis cum quo erigatur celi figura ad quam imponatur locus Lune verus — maxime ubi Luna dignitatem nechyam (?) vendicaverit sibi. Τελóσ’ (followed by tables f. 111r-114v).


 A commentary on Centiloquium v. 51. In MS Vienna, ÖNB, 5503, the text is followed by four tables ‘Tabula more infantis in utero matris. Mora occidentalis, Luna super terram’, ‘Tabula more infantis in utero matris. Mora orientalis, Luna infra terram’, ‘Tabula mediorum motuum infra tempus more’ and ‘Tabula mediorum mottum in horis et minutis hore infra tempus more’. It is unclear whether these tables belong to the text. Notes in the upper margin of f. 111r-114r ascribe these tables to Johannes Bianchini and similar tables are indeed found in the second edition (ed. Luca Gaurico, Venice, 1526, sig. 394v-397v) of Bianchini’s astronomical tables, where they are attributed to Jacobus de Dondis and Luca Gaurico (cf. J. Chabás, B. R. Goldstein, The Astronomical Tables of Giovanni Bianchini, Leiden-Boston, 2009, 129-132).


In the two known MSS, this commentary is attributed to Giovanni Pontano, but it is unlikely to be correct, as neither the text nor the commentary corresponds to Pontano’s. By contrast, both the text and the commentary show similarities with Albertus de Brudzewo’s (?) Circulum pro exitu geniture ab utero iuxta verbum Ptolomei 51 rectificare (C.3.17). This commentary is prior to 1506-1507, when Johannes Schöner copied it in MS Vienna, ÖNB, 5503.