Labour is the real measure of exchangeable value,
and the first price paid for all things.
Wealth is power of purchasing labour.
But value is not commonly estimated by labour, because labour is difficult to measure.
and commodities are more frequently exchanged for other commodities,
especially money, which is therefore more frequently used in estimating value.
But gold and silver vary in value, sometimes costing more and sometimes less labour, whereas equal labour always means equal sacrifice to the labourer,
although the employer regards labour as varying in value.
So regarded, labour has a real and a nominal price.
The distinction between real and nominal is sometimes useful in practice,
since the amount of metal in coins tends to diminish,
and the value of gold and silver to fall.
English rents reserved in money have fallen to a fourth since 1586,
and similar Scotch and French rents almost to nothing.
Corn rents are more stable than money rents,
but liable to much larger annual variations,
so that labour is the only universal standard.
But in ordinary transactions money is sufficient,
being perfectly accurate at the same time and place,
and the only thing to be considered in transactions between distant places.
So it is no wonder that money price has been more attended to.
In this work corn prices will sometimes be used.
Several metals have been coined, but only one is used as the standard, and that usually the one first used in commerce,
as the Romans used copper,
and modern European nations silver.
The standard metal originally was the only legal tender,
later the proportion between the values of the two metals is declared by law, and both are legal tender, the distinction between them ceasing to be of importance,
except when a change is made in the regulated proportion.
During the continuance of a regulated proportion, the value of the most precious metal regulates the value of the whole coinage, as in Great Britain,
where the reformation of the gold coin has raised the value of the silver coin.
Silver is rated below its value in England.
Locke’s explanation of the high price of silver bullion is wrong.
If the silver coin were reformed, it would be melted.
Silver ought to be rated higher and should not be legal tender for more than a guinea.
If it were properly rated, silver bullion would fall below the mint price without any re-coinage.
A seignorage would prevent melting and discourage exportation.
Fluctuations in the market price of gold and silver are due to ordinary commercial causes, but steady divergence from mint price is due to the state of the coin.
The price of goods is adjusted to the actual contents of the coinage.