periodic fluctuations in the quantity of money in circulation, has been scientifically investigated but lately.
In so far as the payments mutually balance as positive and negative quantities, no money actually appears on the scene. It figures here only in its capacity of a measure of value: first, in the prices of commodities, and second, in the magnitude of mutual obligations. Aside from its ideal form, exchange value does not exist here independently, not even in the form of a token of value; that is to say, money plays here only the part of ideal money of account. The function of money as a means of payment thus implies a contradiction. On the one hand, in so far as payments balance, it serves only ideally as a measure of value. On the other hand, in so far as a payment has actually to be made, money enters circulation not as a transient circulating medium, but as the final resting form of the universal equivalent, as the absolute commodity, in a word, as money. Therefore, whenever such a thing as a chain of payments and an artificial system of settling them, is developed, money suddenly changes its visionary nebulous shape as a measure of value, turning into hard cash or means of payment, as soon as some shock causes a violent interruption of the flow of payments and disturbs the mechanism of their settlement. Thus, under conditions of fully developed capitalist production, where the commodity owner has long become a capitalist, knows his Adam Smith, and condescendingly laughs at the superstition that gold and silver alone constitute money or that money differs at all from other commodities as the absolute commodity, money
