“In this manner twenty notes are obtained, eight of which are fundamental: do, re, mi, fa, sol, la, si, do; and twelve intermediate: two between each of the following two notes: do-re re-mi fa-sol sol-la LA-SI; and one between each of the following two notes: mi-fa si-do. “But in practice, that is, in music, instead of twelve intermediate semitones only five are taken, that is one semitone between: do-re re-mi fa-sol sol-la LA-SI. “Between mi and fa and between si and do the semitone is not taken at all. Fragments: Seven