I did some reading on chord inversions on wikipedia, and there is a quote i'd like to ask about:
Inversions are not restricted to the same number of tones as the original chord, nor to any fixed order of tones except with regard to the interval between the root, or its octave, and the bass note, hence, great variety results.
(Hubbard, William Lines (1908). The American History and Encyclopedia of Music, Vol. 10: Musical Dictionary, p.103. Irving Squire: London)
I am wondering about the exception last in the quote, regarding interval between the root and the bass note. Given that the harmonic interval between root and base note varies for each inversion, what is the actual recommendation for creating variations here?