Note 31 — Chapter I · SPECULATIVE PHILOSOPHY IN GREECE, BEFORE AND IN THE TIME OF SOKRATES.
Reading edition
Philolaus, Fr., p. 62, Boeckh. — Diogen. L. viii. 7, 85.
By ἁρμονία, Philolaus meant the musical octave: and his work included many explanations and comparisons respecting the intervals of the musical scale. (Boeckh, p. 65 seq.)