The Wealth of Nations by Part 2 Chapter 2 Page 12

his subsistence, conveniencies, and amusements regularly distributed to him in their proper proportions.

Secondly, as the machines and instruments of a trade, etc., which compose the fixed capital either of an individual or of a society, make no part either of the gross or of the net revenue of either; so money, by means of which the whole revenue of the society is regularly distributed among all its different members, makes itself no part of that revenue. The great wheel of circulation is altogether different from the goods which are circulated by means of it. The revenue of the society consists altogether in those goods, and not in the wheel which circulates them. In computing either the gross or the net revenue of any society, we must always, from their whole annual circulation of money and goods, deduct the whole value