Hughes
The twelve keys, their trinities, scales, and chords, rising seven times through seven octaves, each thirteenth note octave of the previous twelve and first of the rising twelve
—Descending, ascending reversed
—Keys mingled
—The Pendulograph alluded to, . . . 28 [Harmonies of Tones and Colours, Table of Contents2 - Harmonies]

See Also

---

7.22 - Thirteenth
thirteen
thirteen keys
thirteen major mathematical scales
thirteen minor mathematical scales
thirteen pairs
thirteen scales
thirteenth
thirteenth key
thirteenth note
thirteenth note octave
thirteenth octave
thirteenth scale