Note 27 — Chapter VI · THE STUDY OF NATURE. FUNDAMENTAL POSITIONS.

Stob. Ecl. i. 346 (Plut. Pl. i. 12, 4). Zeno, Ibid. 406: οὐ πάντως δὲ σῶμα βάρος ἔχειν, ἀλλ’ ἀβαρῆ εἶναι ἀέρα καὶ πῦρ … φύσει γὰρ ἀνώφοιτα ταῦτ’ εἶναι διὰ τὸ μηδενὸς μετέχειν βάρους. Plut. Sto. Rep. 42, p. 1053: In the treatise περὶ κινήσεως, Chrysippus calls fire ἀβαρὲς and ἀνωφερὲς καὶ τούτῳ παραπλησίως τὸν ἀέρα, τοῦ μὲν ὕδατος τῇ γῇ μᾶλλον προσνεμομένου, τοῦ δ’ ἀέρος, τῷ πυρί. (So too in Ach. Tat. Isag. i. 4 in Pet. Doctr. Temp. iii. 75.) On the other hand, in his Φυσικαὶ τέχναι, he inclines to the view that air in itself is neither heavy nor light, which however can only mean that it is neither absolutely, being heavy compared with fire, and light compared with water and earth. ↑