prices; and, inversely, the quantity of the circulating medium may rise in spite of a decline of the mass of commodities in circulation, if the sum total of prices rises in a greater ratio. Thorough and minute English investigations have demonstrated e. g. that in the early stages of a dearth of grain in England the quantity of money in circulation increases, because the total price of the diminished supply of grain is greater than the former total price of a larger supply of grain, while the circulation of the other commodities continues undisturbed for some time at their old prices. At a later stage of the dearth of grain, there is a decline in the quantity of circulating money, either because less goods are sold at old prices besides grain, or the same quantity of those goods is sold at
But, as we have seen, the quantity of money in circulation is determined not only by the sum total of prices of commodities that are to be realized, but also by the rapidity with which money circulates or with which it completes this work of realization. If the same sovereign makes ten purchases a day, each of a commodity having a price of one sovereign, and thus changes hands ten times, it does as much work as would be accomplished by ten sovereigns each performing but a single act of circulation a day.74 Consequently, rapidity of gold circulation can make up for its quantity, or the presence of gold in the sphere of circulation is determined not only by its presence as an equivalent of a commodity side by side with it, but also by its participation in the movement of metamorphoses of commodities. The rapidity of the circulation of money, however, can serve as a substitute for its quantity only to a limited extent, since at any given moment an endless number of isolated purchases and sales takes places in different localities.
If the total price of the commodities in circulation rises, but in a smaller ratio than the increase in the rapidity of circulation of money, the volume of the circulating medium will diminish. If on the contrary the rapidity of circulation decreases in a greater ratio than the total price of the commodities in circulation, the