icher, by adding to value in use; but as they perform their work
gratuitously, as nothing is paid for the use of air, of heat, and of
water, the assistance which they afford us, adds nothing to value in
exchange. In the first chapter of the second book, M. Say himself gives
a similar statement of value, for he says that "utility is the
foundation of value, that commodities are only desirable, because they
are in some way useful, but that their value depends not on their
utility, not on the degree in which they are desired, but on the
quantity of labour necessary to procure them." "The utility of a
commodity thus understood, makes it an object of man's desire, makes him
wish for it, and establishes a demand for it. When to obtain a thing, it
is sufficient to desire it, it may be considered as an article of
natural wealth, given to man in an unlimited quantity, and which he
enjoys, without purchasing it by any sacrifice; such are the air, water,
the light of the sun. If he obtained in this manner all the objects of
his wants and desires, he would be infinitely rich: he would be in want
of nothing. But unfortunately this is not the case; the greater part of
the things which are convenient and agreeable to him, as well as those
which are indispensably necessary in the social state, for which man
seems to be specifically formed, are not given to him gratuitously; they
could only exist by the exertion of certain labour, the employment of a
certain capital, and, in many cases, by the use of land. These are
obstacles in the way of gratuitous enjoyment; obstacles from which
result a real expense of production; because we are obliged to pay for
the assistance of these agents of production." "It is only when this
utility has thus been communicated to a thing (viz. by industry,
capital, and land,) that it is a production, _and that it has a value_.
It is its utility which is the foundation of the demand for it, _but the
sacrifices, and the charges necessary to obtain it, or in other
words, its price_, limits the extent of this demand."

The confusion which arises from confounding the terms "value" and
"riches" will best be seen in the following passages.[31] His pupil
observes: "You have said, besides, that the riches of a society were
composed of the sum total of the values which it possessed; it appears
to me to follow, that the fall of one production, of stockings for
example, by diminishing the sum total of the value belonging t