PAL

Ptolemaeus Arabus et Latinus

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Federico Commandino, In Planisphaerium Ptolemaei commentarius

Venice, Paulus Manutius Aldi, 1558 · 8r

Facsimile

producto cono et plane secante complebitur, et circulus vel ellipsis ex quinta et decimatertia primi conicorum.

At vero, cum circuli ABCDLMNO diameter AL non sit in eadem recta linea, ipsi GF communes sectiones non erunt, neque circuli neque ellipses, quoniam plani, in quo est coni basis et tabulae ipsius, communis sectio non erit recta linea perpendicularis