Note 677 — Chapter VI · LUNAR CALENDARS AND THE WEEK
Reading edition
As a matter of fact the gamut, or scale of seven notes comprised within the interval of an octave, rests on no fundamental laws of acoustic phenomena but is itself a product of the all-pervading symbolism of seven. This system of musical numeration has spread from Greece as far east as India and China. See J. Combarieu, La musique et la magie, Paris, 1909, pp. 176-200.