NATURAL a.
Applied to an air or modulation of harmony which moves by easy and smooth transitions, digressing but little from the original key. Moore (Encyc. of Music). Natural day, the space of twenty-four hours. Chaucer. -- Natural fats, Natural gas, etc. See under Fat, Gas. etc. -- Natural Harmony (Mus.), the harmony of the t…
PROGRESSION n.
lar succession of tones or chords; the movement of the parts in harmony; the order of the modulations in a piece from key to key. Arithmetical progression, a progression in which the terms increase or decrease by equal differences, as the numbers 2, 4, 6, 8, 1010, 8, 6, 4, 2 -- Geometrical progression, a progression in…