circulation of money as coin or as a means of purchase. The sum total of prices made up by all the purchases and sales taking place at the same time, and, therefore, side by side, constitutes the limit for the substitution of the volume of coin by the rapidity of its circulation. If the payments that are to be made simultaneously are concentrated at one place―which naturally arises at first at points where the circulation of commodities is largest―the payments balance each other as negative and positive quantities: A is under obligations to pay B, while he has to be paid by C. etc. The quantity of money required as a means of payment will, therefore, be determined not by the total amount of payments which have to be made simultaneously, but by the greater or less concentration of the same and by the magnitude of the balance remaining after their mutual neutralization as negative and positive quantities. Special arrangements are made for settlements of this kind even where the credit system is not developed at all, as was the case e. g. in ancient Rome. The consideration of these arrangements, however, as well as that of the general time limits of payment, which are everywhere established among certain elements in the community, does not belong here. We may add that the specific influence which these time settlements exert on the 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