Note 52 — Chapter VI · THE STUDY OF NATURE. FUNDAMENTAL POSITIONS.
Oswald J. (Oswald Joseph) Reichel translation
Thus colours are explained as πρῶτοι σχηματισμοὶ τῆς ὕλης (Stob. i. 364; Plac. i. 15, 5); and sounds are spoken of as undulations in the air by Plut. Plac. iv. 19, 5; Diog. 158. ↑