Hughes
The modulating gamut
—One series of the twelve keys meeting by fifths through seven octaves
—Keys not mingled
—A table of the key-notes and their trinities thus meeting
—The fourths not isolated
—The table of the twelve scales meeting by fifths
—The twelve keys, trinities, scales, and chords thus meeting are written in musical clef
—The twelve meeting through seven circles, each circle representing the eighteen tones
—The keys of C and G meeting, coloured
—Retrospection of the various major developments, . . . . 29 [Harmonies of Tones and Colours, Table of Contents3 - Harmonies]
Finally, trace the twelve keys by fifths as they veer round through the seven circles, each circle representing the eighteen tones. Beginning with C in the innermost circle ascending, C becomes the root of G, G of D, and so on. In descending, begin with C in the outermost circle (though really the first of a higher series which we have not the power of striking on instruments); F, its root, becomes the key-note, B? the root and then the key-note, and so on. The keys thus gained are written in musical clef below. [Harmonies of Tones and Colours, The Twelve Scales Meeting by Fifths, page 31a]
The 12 Major Key-notes meeting by fifths veering round. Each of the seven circles represents a musical clef of the 18 tones. The note or notes, whether in musical clef on spaces or lines, are written here on the circle from which they rise. [Harmonies of Tones and Colours, Diagram VII Continued2, page 31e]
Lastly, we trace the twelve ascending by fifths as they veer round through the seven circles, each circle representing the eighteen tones, beginning with A in the innermost circle. A becomes the root of E, E of B, and so on. In descending, we begin with A in the outermost circle, though it is in fact the commencement of a higher series which we cannot strike. D, its root, becomes the fifth key-note lower, and so on. The keys of A and E are coloured, to show the result of the minor harmonies meeting by fifths. [Harmonies of Tones and Colours, Diagram XIV - The Modulating Gamut of the Twelve Minor Keys by Fifths3, page 41a]
This diagram shews the modulating gamut of the 12 Minor Keys meeting by fifths; each of the 7 circles representing musical clefs of the 18 tones, as before. [Harmonies of Tones and Colours, Diagram Shews the Modulating of the 12 Minor Keys, page 41e]
See Also