particular wants, in short, a relation in which they are distinguished as actual use-values. But this equivalence and non-equivalence mutually exclude each other. Thus we have before us not only a vicious circle of problems in which the solution of one implies that of the other, but a combination of contradicting claims, since the fulfillment of one is directly connected with that of its opposite. The process of exchange of commodities must result both in the unfolding and in the solution of these contradictions, neither of which, however, can appear in that process in this simple way. We have only observed how commodities are mutually related to each other as use-values, i. e., how they appear as use-values _within_ the process of exchange. The exchange-value, on the contrary, as we have considered it so far, appeared as an abstraction formed in our own minds, or―if we may so put it―in the mind of the individual owner of commodities, which lie stored in his warehouse as use-values, and weigh upon his conscience as exchange values. In the process of exchange, however, commodities must be not only use-values, but also exchange values to one another, and that should appear as their own mutual relation. The difficulty which we first encountered was that a commodity must be first alienated and delivered to its purchasers as a use-value, in order to appear as an exchange value, as materialized labor, while on the other hand its alienation as use-value implies its being an exchange value. But let us assume that this difficulty has been overcome. Suppose the commodity has divested itself of its use-value, and has thereby fulfilled the material condition of being socially useful labor, instead of a particular labor of an individual. In that case, the commodity must become an exchange value, a universal equivalent, an embodiment of universal labor-time for all other commodities in the process of exchange, and thus, leaving behind its limited role of a particular use-value, acquire the ability to be directly represented in all use-values as its equivalents. But every commodity is _just such_ a commodity, appearing as a direct incarnation of universal labor-time by divesting itself of its particular use-value. On the other hand, however, commodities confront each other in the process of exchange as particular commodities, as the labor of private individuals embodied in particular use-values. Universal labor-time is itself an abstraction, which, as such, does not exist for commodities. Let us examine the series of equations in which the exchange value of a commodity finds its concrete expression, e. g.: 1 yard of linen = 2 lbs. of coffee. 1 yard of linen = 1/2 lb. of tea. 1 yard of linen = 8 lbs. of bread, etc.