# Elementa astronomia 17-4

Geminus, Elementa astronomia, Cap. XVIII. Περὶ ἐξελιγμοῦ.. Ancient Greek.

Canonical: https://interlinea.aeterna-institute.org/library/greek/geminus/elementa-astronomia/17-4

ὃς πολυπλασιάσας τὸ τέταρτον μέρος τοῦ ἀποκαταστατικοῦ χρόνου ἀποτελέσει τινὰ ἀριθμόν, ὃς προστεθεὶς μὲν τῇ μέσῃ κινήσει ποιήσει τινὰ ἀριθμὸν μείζονα μὲν ⟨τῶν⟩ ιε′ μοιρῶν, ἐλάττονα δὲ τῶν ις′, ἀφαιρεθεὶς δὲ ἀπὸ τῆς μέσης κινήσεως ἀπολείψει τινὰ ἀριθμὸν μείζονα μὲν τῶν ια′ μοιρῶν, ἐλάττονα δὲ τῶν ιβ′· τὰ δὲ προστιθέμενα ταῖς ιε′ μοίραις καὶ ταῖς ια′ ἔσται ἐπὶ τὸ αὐτὸ πρῶτα ἑξηκοστὰ κα′ καὶ δεύτερα ι′.

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Geminus, Elementa astronomia, ed. Charles Manitius. Text: The Greek Library, from the Perseus Digital Library and other open sources, CC BY-SA 4.0. Changes: apostrophes normalised and the text divided into reading sections by Interlinea.
License: CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/). Source: https://thegreeklibrary.pages.lisn.upsaclay.fr/works/tlg1383.tlg001.local001/.