Ramsay
There are very few things in music which have not change written upon them. TWELVE and THREE, however, are stable. There is nothing that will disturb the propriety of the circle of twelve fifths, as in the tempered system of music; for, although the mathematical-intonation indulges in thirteen keys, the thirteenth is simply the first of a new cycle of twelve.
The working model of three fifths is that which possesses musical life-powers; and these life-powers go with it wherever it goes, and they go with nothing else. [Scientific Basis and Build of Music, page 74]
sexual note in the scales of G major and E minor are the two A's; in D major and B minor, the two E's; in A major and F# minor, the two B's; in E major and C# minor, the two F's; in B major and G# minor, the two C's; and in F# major and D# minor, the two G's. These two last scales being the beginning of a second cycle of twelve scales when the scales are written half in flats and half in sharps, as we have done them in this case. Turning to the other half of our circle, those which we have, and which usually in music books are, written in flats, in F major and D minor the sexual notes are the two G's; in B? and G, the two C's, in E? and C, the two F's; in A? and F, the two B's; in D? and B?, the two E's; and in G? and E?, the two A's. [Scientific Basis and Build of Music, page 91]
See Also
7.22 - Thirteenth
circle of twelve fifths
cycle
Keeper of the Keys
key
progression of keys
Ramsay - PLATE VII - The 24 Keys and their Chords
Ramsay - PLATE X - Growth-like Continuity of Chords and Keys
Ramsay - PLATE XXII - Mathematical Table of the Twelve Major Scales and their relative Minors
Ramsay - The Closed System of the Twelve Keys
Ramsay - The New Notes of New Keys and their Service
system of twelve Fifths
thirteen pairs
thirteenth scale
twelve fifths
twelve keys
twelve major keys
twelve major scales
twelve minor keys
twelve minor scales
twelve
twice twelve-fold family of keys