PAL

Ptolemaeus Arabus et Latinus

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Ptolemy, De suppositione planetarum (tr. before 1595)

Schweinfurt, SB, Ha 16 (H 85) · 17r

Facsimile

supputationem unius gradus sexagesima 3. Rursus autem consideretur et in epicycli sphaera parvus circulus circa centrum ipsius in obliqui circuli plano, recta per utrunque centrum ducta et illius et magis apogei duorum dictorum circa quod moventur pari celeritate pari celeritate] corr. in aequabiliter (perhaps other hand) eadem puncta semper circelli apprehendentis quae vocamus apogeum et perigeum. Et alius parvus circulus concentricus ipsi feratur in eodem plano et circa idem centrum pari celeritate ut discessus secundum apogeum in contraria revolutioni mundi constituat parem transitum ei quae dicitur epicycli. Gerat autem etiam hic parvus circulus alium sibi impositum corr. in inclinatum (perhaps other hand) et circa idem centrum immutabilis, situ continente angulum talium rursum 1 ½ qualium est una recta una recta] corr. in unus rectus (perhaps other hand) 90. Eius autem quae a centro eccentrico ad eam quae e centro circelli ratio est eadem quae 60 ad 39 ½. Et super hoc circello moveatur stella circa centrum ipsius pari celeritate digressu secundum apogeum in contraria revolutioni mundi constituente parem transitum utrisque et epicycli et stellae, hoc est eminentia