of circulation, we witness the same monotonous operation. After realizing the price of C, M successively realizes those of C', C'', etc., and commodities C', C'', C''', etc., constantly take the place which money has left. Money thus appears to keep commodities in circulation by realizing their prices. In discharging this function of realization of prices, money is itself constantly circulating, now changing its place, now describing a curve of circulation, now completing a small circuit where the starting and returning points coincide. As a medium of circulation, money is subject to a circulation of its own. The change of form of the circulating commodities appears, therefore, as a movement of money which furthers the exchange of commodities, motionless in themselves. The movement of the circulation process of commodities thus takes on the form of the movement of gold as a medium of circulation, i. e. of the circulation of money.
Since owners of commodities give the products of their individual labor the appearance of products of social labor by turning one object, viz. gold, into the direct expression of universal labor-time and therefore into money, their own movement by which all of them effect the interchange of the material products of their labor now appears to them as the direct movement of that one object, as the circulation of gold. The social movement itself appears to the owners of commodities partly as an outward necessity and partly as a mere formal intermediary process which enables every individual who puts any use-value into circulation to get other use-values out of it of an equal value. The use-value of commodities comes into play with their disappearance
