If, however, the weight in a degraded form, and the foot in an undegraded form, come from the East, it is needless to look for an exact relation between them, but rather for a mere working equivalent, like the 1000 ounces to the cubit foot in England.
The Romans commonly used fractions with denominator 12; these were described as unciae (ounces), being twelfths of the as (pound).
Instead of expressing the amounts of gold and silver in percentages of the weight of ore, they are expressed in ounces to the ton, the ounce being the troy ounce and the ton that of 2000 avoirdupois pounds.
Twelve years of campaigning on the Galician frontier were concluded in 1143 by the peace of Zamora, in which Alphonso was recognized as independent of any Spanish sovereign, although he promised to be a faithful vassal of the pope and to pay him a yearly tribute of four ounces of gold.
" Japan " copper is purple-red in colour, and is formed by casting into ingots, weighing from six ounces to a pound, and rapidly cooling by immersion in water.