Ramsay
Such is the economy of Nature, that from one system of proportions employed in two ways - in the one case as periods of vibrations, and in the other case as quantities of strings - everything in music is derived. The numbers which are the periods in the one are the numbers which are the quantities in the other. And abundantly throughout Creation reigneth the Law of Duality, which thus reigneth here in this region of most perfect response.2[Scientific Basis and Build of Music, page 44]
See Also
first comparison and combination of quantities
harp string
laws of quantities and motions
Laws of String Vibration
nine string chord
order of quantities
quantities
quantities and motions
Ramsay - Duality in Quantities of Strings and Vibrations
Ramsay - PLATE XXIV - Vibrations of the Major are the String-lengths for the Minor
relative quantities
strand of wire or gut-string
string
String Theory
sympathetic string
unit of quantities