Two questions now arise: (1) by whom should the money be owned, and (2) how much of it should there be? The answer to the first question, no doubt, is that the workers receive their wages in the form of money with which they buy consumer goods. From the point of view of society, this means merely that the workers are allocated a certain share of the fund for consumption: every society, whatever its historical form of production, makes such allocations to its workers. It is, however, an essential characteristic of the capitalist form of production that the workers do not obtain their share directly in the form of goods but by way of commodity exchange, just as it is an essential feature of the capitalist mode of production that their labour power is not applied directly, as a result of a relation of personal domination, but again by way of commodity exchange: the workers selling their labour power to the owners of the means of production, and purchasing freely their consumer goods. Variable capital in its money form is the expression and medium of both these transactions. Money, then, comes first into circulation by the payment of wages. The capitalist class must therefore set a certain quantity of money circulating in the first place, and this must be equal to the amount they pay in wages. The capitalists of Department I need 1,000 units of money, and the capitalists of Department II need 500 to meet their wages bill. Thus, according to our diagram, two quantities of money are circulating: I(1,000_v_) and II(500_v_). The workers spend the total of 1,500 on consumer goods, i.e. on the products of Department II. In this way, labour power is maintained, that is to say the variable capital of society is reproduced in its natural form, as the foundation of all other reproductions of capital. At the same time, the capitalists of Department II dispose of their aggregate product (1,500) in the following manner: their own workers receive 500 and the workers of Department I receive 1,000. This exchange gives the capitalists of Department II possession of 1,500 money units: 500 are their own variable capital which has returned to them; these may start circulating again as variable capital but for the time being they have completed their course. The other 1,000 accrue to them year by year out of the realisation of one-third of their own products. The capitalists of Department II now buy means of production from the capitalists of Department I for these 1,000 money units in order to renew the part of their own constant capital that has been used up. By means of this purchase, Department II renews in its natural form half of the constant capital II_c_ it requires. Department I now has in return 1,000 money units which are nothing more than the money originally paid to its own workers. Now, after having changed hands twice, the money has returned to Department I, to become effective later as variable capital. This