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 actually been exchanged for money or other goods, nor has it been raised with the intention of being so exchanged, and therefore, according to the last definition, it ought not to be considered as wealth.

It must be allowed nevertheless, that it has exchangeable value; and here one of the great characteristic differences between material objects and objects which are not material appears in a striking point of view. Of the quantity and quality of the material commodities here noticed it would not be difficult to make an inventory. Many household books indeed furnish one; and knowing pretty nearly the quantity and quality of such articles, a fair approximation to their value might be attained by estimating them according to the market prices of the district at the time. But in regard to immaterial objects, the difficulty seems to be insurmountable. Where is an inventory to be found, or how is one to be made of the quantity and quality of that large mass of knowledge and talents reserved for the use and consumption of the individual possessors and their friends. Or supposing it were possible to form such an inventory, how could we make any moderate approaches towards a valuation of the articles it contained. Consequently, if by objects which have value in exchange we mean objects which are susceptible of being exchanged, we shall include such a mass of the mental and physical qualities of mankind as to make the term wealth convey no tolerably distinct and useful meaning.

And if by objects which have value in exchange we mean only those objects which have actually been, or are specifically intended to be exchanged, we shall exclude from the denomination of wealth a large mass of material commodities which have always, and most justly, been classed under that head?

To get rid of these obvious embarrassments, it has sometimes been the practice to consider the labour which is hired, as the wealth which is purchased without reference to its results. But it seems very