part of his neat revenue, which must consist altogether in his profits. But though the circulating capital of every individual makes a part of that of the society to which he belongs, it is not upon that account totally excluded from making a part likewise of their neat revenue. Though the whole goods in a merchant’s shop must by no means be placed in his own stock reserved for immediate consumption, they may in that of other people, who, from a revenue derived from other funds, may regularly replace their value to him, together with its profits, without occasioning any diminution either of his capital or of theirs.
Money, therefore, is the only part of the circulating capital of a society, of which the maintenance can occasion any diminution in their neat revenue.
The fixed capital, and that part of the circulating capital which consists in money, so far as they affect the revenue of the society, bear a very great resemblance to one another.
First, as those machines and instruments of trade, etc. require a certain expense, first to erect them, and afterwards to support them, both which expenses, though they make a part of the gross, are deductions from the neat revenue of the society; so the stock of money which circulates in any country must require a certain expense, first to collect it, and afterwards to support it; both which expenses, though they make a part of the gross, are, in the same manner, deductions from the neat revenue of the society. A certain quantity of very valuable materials, gold and silver, and of very curious labour, instead of augmenting the stock reserved for immediate consumption, the subsistence, conveniencies, and amusements of individuals, is employed in supporting that great but expensive instrument of commerce, by means of which every individual in the society has his subsistence, conveniencies, and amusements, regularly distributed to him in their proper proportions.