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
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 prices of commodities, the value of the quantity of gold which serves as a unit of measure, or the value of gold, is assumed to be given. Under that assumption the quantity of gold necessary for circulation is determined first of all by the sum total of the prices of commodities that are to be realized. But this sum is itself determined: 1. By the level of prices, the relatively high or low exchange value of commodities estimated in gold; and 2. By the mass of commodities circulating at fixed prices, i. e. by the number of purchases and sales at given prices.73 If one quarter of wheat is worth 60 shillings, then twice as much gold is required to circulate it or to realize its price as would be the case if it were worth only 30 shillings. To circulate 500 quarters of wheat at 60 shillings, twice as much gold is necessary as for the circulation of 250 quarters at the same price. Finally, to circulate 10 quarters at 100 shillings only half as much money is necessary as when circulating 40 quarters at 50 shillings. It follows that the quantity of gold required for circulation may fall in spite of a rise in price, if the mass of commodities in circulation declines in a greater ratio than the rise of the combined sum of