book 1

, chap. v.

The price in money, or _nominal_ price of a thing, differs from its _real_ price, which is its valuation by the quantity of labour expended upon it, or which it represents--ibid.

Laws, according to which the price of wealth is naturally fixed; and those accidental circumstances which occasion the actual to differ from the natural price, and which gave rise to a distinction between the _natural_ and the _market price_--