n Hippocratis aphorismos commentarii vii 17b.532.1K

Hello, can someone help me with the translation of this:

οὐ μὴν οὐδὲ τὸ κατὰ τὸ πρῶτον τῶν ἐπιδημιῶν γεγραμμένον, καὶ μάλιστα ἔθνησκον οἷς ἔῤῥεπεν ἡ φύσις ἐπὶ τὸ φθινῶδες, ἐναντιοῦται τοῖς εἰρημένοις. οὐ γὰρ τὴν ἐκ τῶν στοιχείων κρᾶσιν εἴρηκε νῦν, ἀλλὰ τὴν τοῦ σώματος ἰδέαν. ἔστιν ὅτε γὰρ ὀνομάζουσι φύσιν καὶ ταύτην.

If Iunderstand the meaning, it is definying φύσις as τοῦ σώματος ἰδέαν, right?

Thanks a lot in advance.