Page:Contribution to the Critique of Political Economy, A - Karl Marx.djvu/138

Rh by two conditions: first, the sum total of the prices; second, the average number of moves made by one coin. This number of moves or the rapidity of circulation of money is in its turn determined by or expresses the average rapidity with which commodities go through the different phases of their metamorphoses, the rapidity with which these metamorphoses succeed one another, and with which those commodities that have gone through their metamorphoses are replaced by new commodities in the process of circulation. We have seen that in the process of the determination of prices the exchange value of all commodities is ideally converted into a certain quantity of gold of the same value and that the same amount of value is present in a double form in either of the isolated acts of circulation M—C and C—M, first embodied in the commodity, and second, in gold; yet gold enjoys the capacity of a medium of circulation not by virtue of its isolated relation to separate commodities in a state of rest, but owing to its active presence in the dynamic world of commodities, viz., its function of expressing the change of form of commodities by its change of place and expressing the rapidity of their change of form by the rapidity of its change of place. The extent to which it is present in the sphere of circulation, i. e., the actual quantity of gold in circulation, is thus determined by the extent to which it is discharging its function throughout the entire process.

The circulation of money implies the circulation of commodities; money circulates commodities which have prices, i. e., which are beforehand ideally equated to certain quantities of gold. In the determination of the