Page:Contribution to the Critique of Political Economy, A - Karl Marx.djvu/27

Rh indifference to the nature of its economic destination, i.e. use-value as such lies outside the sphere of investigation of political economy. It falls within the sphere of the latter only in so far as it forms its own economic destination. It forms the material basis which directly underlies a definite economic relation called exchange value.

Exchange-value appears at first sight as a quantitative relation, as a proportion in which use-values are exchanged for one another. In such a relation they constitute equal exchangeable quantities. Thus, a volume of Propercius and eight ounces of snuff may represent the same exchange value, in spite of the dissimilar use-values of tobacco and elegy. As exchange-value, one kind of use-value is worth as much as another kind, if only taken in right proportion. The exchange value of a palace can be expressed in a certain number of boxes of shoe-blacking. On the contrary, London manufacturers of shoe-blacking have expressed the exchange value of their many boxes of blacking, in palaces. Thus, entirely apart from their natural forms and without regard to the specific kind of wants for which they serve as use-values, commodities in certain quantities equal each other, take each other's place in exchange, pass as equivalents, and in spite of their variegated appearance, represent the same entity.