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Thales' Determination of the Diameters of the Sun and Moon
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Cle omedes, De motu circulari corporum caelestium. II. 75 (p. 136 Ziegler). Ἐλέγχεται δὲ καὶ διὰ τῶν ὑδρολογίων τὸ εὔηθες τοῦ λόγου [viz. ὅτι ποδιαῖός ἐστιν ὁ ἥλιος]. Δείκνυται γὰρ δι' αὐτῶν, ὅτι, ἂν ᾖ ποδιαῖος ὁ ἥλιος, δεήσει τὸν μέγιστον τοῦ οὐρανοῦ κύκλον ἑπτακοσίων πεντήκοντα ποδῶν εἶναι. Διὰ γὰρ τῶν ὑδρολογίων καταμετρούμενος εὑρίσκεται μέρος ἑπτακοσιοστὸν καὶ πεντηκοστὸν τοὑ οἰκείου κύκλου. Ἐὰν γὰρ, ἐν ᾧ αὐτὸς ἀνέρχεται πᾶς ἐκ τοῦ ὁρίƷοντος ὁ ἥλιος, κύαθος, φέρε εἰπεῖν, ῥεύσῃ, τὸ ὅδωρ ἀφεθὲν ὅλῃ τῇ ἡμέρᾳ καὶ νυκτὶ ῥεῖν εὑρίσκεται κυάθους ἔχον ἑπτακοσίους καὶ πεντήκοντα. Λέγεται δὲ ἡ τοιαύτη ἔφοδος ὑπὸ πρώτων τῶν Αἰγυπτίων ἐπινοηθῆναι.
Title: Thales' Determination of the Diameters of the Sun and Moon
Description:
Cle omedes, De motu circulari corporum caelestium.
II.
75 (p.
136 Ziegler).
Ἐλέγχεται δὲ καὶ διὰ τῶν ὑδρολογίων τὸ εὔηθες τοῦ λόγου [viz.
ὅτι ποδιαῖός ἐστιν ὁ ἥλιος].
Δείκνυται γὰρ δι' αὐτῶν, ὅτι, ἂν ᾖ ποδιαῖος ὁ ἥλιος, δεήσει τὸν μέγιστον τοῦ οὐρανοῦ κύκλον ἑπτακοσίων πεντήκοντα ποδῶν εἶναι.
Διὰ γὰρ τῶν ὑδρολογίων καταμετρούμενος εὑρίσκεται μέρος ἑπτακοσιοστὸν καὶ πεντηκοστὸν τοὑ οἰκείου κύκλου.
Ἐὰν γὰρ, ἐν ᾧ αὐτὸς ἀνέρχεται πᾶς ἐκ τοῦ ὁρίƷοντος ὁ ἥλιος, κύαθος, φέρε εἰπεῖν, ῥεύσῃ, τὸ ὅδωρ ἀφεθὲν ὅλῃ τῇ ἡμέρᾳ καὶ νυκτὶ ῥεῖν εὑρίσκεται κυάθους ἔχον ἑπτακοσίους καὶ πεντήκοντα.
Λέγεται δὲ ἡ τοιαύτη ἔφοδος ὑπὸ πρώτων τῶν Αἰγυπτίων ἐπινοηθῆναι.
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