Together with this additional quantity of commodities, a part of the additional money needed for its realisation is thrown into circulation, inasmuch as the value of this mass of commodities is equal to that of the productive capital consumed in their production. This additional amount of money has been advanced precisely as additional money-capital, and therefore returns to the capitalist through the turnover of his capital. Here the same question as above re-appears. Where does the additional money come from with which to realise the additional surplus-value now contained in the form of commodities?
The general reply is again the same. The sum total of the prices of the circulating commodities has been increased, not because the prices of a given quantity of commodities have risen, but because the mass of commodities now circulating is greater than that of the previously circulating commodities, without it being offset by a fall in prices. The additional money required for the circulation of this greater quantity of commodities of greater value must be secured either by greater economy in the use of the circulating quantity of money -- whether by balancing the payments, etc., by measures which accelerate the circulation of the same coins --or by the transformation of money from the form of a hoard into that of a circulating medium. The latter does not only imply that idle money-capital begins to function as a means of purchase or payment, or that money-capital already functioning as a reserve fund while performing this function for its owner, actively circulates for society (as is the case with bank deposits which are continually lent), thus performing a double function. It also implies that the stagnating reserve funds of coins are economised.
"In order that money should flow continuously as coin, coin must constantly coagulate as money. The continual currency of coin depends on its continual stagnation, in greater or smaller quantities, in reserve funds of coin which spring up throughout the sphere of circulation and also necessitate it; the formation, distribution, dissolution, and re-formation of these reserve funds are constantly alternating, their existence constantly disappears, their disappearance constantly exists. Adam Smith ex-pressed this never-ceasing transformation of coin into money and of money into coin by saying that every owner of commodities must always keep in supply, aside from the particular commodity which he sells, a certain quantity of the universal commodity with which he buys. We saw that in the circulation C---M---C the second member M---C splits up constantly into a series of purchases which do not take place at once but at successive intervals of time, so that one part of M is current as coin while the other rests as money. As a matter of fact money is in that case only suspended coin and the separate parts of the current mass of coins continuously appear now in the one form, and now in the other, alternating constantly. This first transformation of the medium of circulation into money represents, therefore, but a technical aspect of money-circulation itself." (Karl Marx, Zur Kritik der Politischen Oekonomie , 1859, SS. 105, 106.) ("Coin" as distinguished from money is here employed to indicate money in its function of a mere medium of circulation in contrast with its other functions.)When all these measures do not suffice, additional gold must be produced, or, what amounts to the same, a part of the additional product exchanged, directly or indirectly, for gold -- the product of countries in which precious metals are mined.
The entire amount of labour-power and social means of production expended in the annual production of gold and silver intended as instruments of circulation constitutes a bulky item of the faux frais of the capitalist mode of production, of the production of commodities in general.
It is an equivalent abstraction from social utilisation of as many additional means of production and consumption as possible, i.e., of real wealth.
To the extent that the costs of this expensive machinery of circulation are decreased, the given scale of production or the given degree of its extension remaining constant, the productive power of social labour is eo ipso increased. Hence, so far as the expediencies developing with the credit system have this effect, they increase capitalist wealth directly, either by performing a large portion of the social production and labour-power without any intervention of real money, or by raising the functional capacity of the quantity of money really functioning.
This disposes also of the absurd question whether capitalist production in its present volume would be possible without the credit system (even if regarded only from this point of view), that is, with the circulation of metallic coin alone. Evidently this is not the case. It would rather have encountered barriers in the volume of production of precious metals.
On the other hand one must not entertain any fantastic illusions on the productive power of the credit system, so far as it supplies or sets in motion money-capital. A further analysis of this question is out of place here.
We have now to investigate the case in which there takes place no real accumulation, i.e., no direct expansion of the scale of production, but where a part of the realised surplus-value is accumulated for a longer or shorter time as a money-reserve fund, in order to be transformed later into productive capital.
Inasmuch as the money so accumulating is additional money, the matter needs no explanation. It can only be a portion of the surplus-gold brought from gold-producing countries. In this connection it must be noted that the home product, in exchange for which this gold is imported, is no longer in the country in question. It has been exported to foreign countries in exchange for gold.