# Περὶ πυρός 4.33

Theophrastus, Περὶ πυρός, Chapter 4. Ancient Greek.

Canonical: https://interlinea.aeterna-institute.org/library/greek/theophrastus/text-3/4.33

πάντων δὲ τούτων καὶ τῶν τοιούτων αἰτιάσαιτ᾽ ἄν τις τὴν λεπτότητα καὶ παχύτητα· θερμαίνει τε γὰρ τὴν σάρκα καὶ τὸ ὕδωρ ἡ τῶν καλάμων τάχιστα διὰ τὴν λεπτότητα καὶ πυκνότητα. λεπτὴ μὲν γὰρ ὅτι κοῦφος, πυκνὴ δὲ ὅτι συνεχής. τὸ δὲ λεπτὸν διαδυτικὸν καὶ τὸ θερμαίνεσθαι διὰ τὴν συναφὴν καὶ κατάμιξιν· ἥ τε φλὸξ ὅλως τῶν ἀνθράκων μᾶλλον διαδυτικὴ καὶ ἅμα πλείων ἡ ἀπορροὴ καὶ ἀθροωτέρα.

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Theophrastus, Περὶ πυρός, ed. Friedrich Wimmer. 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/tlg0093.tlg005.local001/.