be those of owners of commodities.
Now, if we consider the result of C—M—C, it comes down to mere interchange of matter, C—C. A commodity has been exchanged for a commodity, a use-value for a use-value, and the transformation of the commodity into money, or the commodity in its form of money, serves merely as a means of effecting this interchange of matter. Money thus appears merely as a medium of exchange of commodities; not as a medium of exchange in general, but as a means of exchange in the sphere of circulation, i. e., a medium of circulation.69
We have seen that the process of circulation of commodities comes to a completion in C—C, appearing as mere barter carried on by means of money; further, that C—M—C represents in general not only two isolated processes, but their dynamic union as well; but to draw from that the conclusion that purchase and sale form an indivisible unit, is a mode of thinking the criticism of which belongs to the domain of logic, and not to that of economics. The separation of purchase and sale in the process of exchange destroys