Hughes
The twelve major and the twelve minor keys written in musical clef
—First, the twelve major keys rising mingled as they develope seven times through seven octaves
—Second, one series of the twelve meeting by fifths, keys not mingled
—Third, the twelve minor keys mingled
—Fourth, the twelve minor key-notes and their trinities, the keys meeting by fifths in the line above the keys of the ascending scales, and in the line below the keys of the descending scales, 42 [Harmonies of Tones and Colours, Table of Contents3 - Harmonies]

See Also

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falling
bottom of the descending genesis
descend
descendant
Descending
descending piston
descending scale
development-fostering falling temperature gradient
down
free-fall
keys of the descending scales
law of a falling body