John Weeks Moore, Complete Encyclopaedia of Music… (1880)
“ In music there is no such thing as a simple sound ; that is, no tone of a musical character can be produced which is, strictly speaking, one and indivisible. It is capable of separation into distinct constituent parts. As the rays of light are the result of the combination of the seven primary colors, which can he separated by the prismatic glass, so musical sounds are themselves combinations of other sounds. ”
