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Such parts only of the produce of land can commonly be brought to

market, of which the ordinary price is sufficient to replace the

stock which must be employed in bringing them thither, together

with its ordinary profits. If the ordinary price is more than

this, the surplus part of it will naturally go to the rent of the

land. If it is not more, though the commodity may be brought to

market, it can afford no rent to the landlord. Whether the price

is, or is not more, depends upon the demand.

There are some parts of the produce of land, for which the demand

must always be such as to afford a greater price than what is

sufficient to bring them to market; and there are others for

which it either may or may not be such as to afford this greater

price. The former must always afford a rent to the landlord. The

latter sometimes may and sometimes may not, according to

different circumstances.