It is not quite clear how this can help us over the hurdle, help to get accumulation going. For one thing, the formation of additional variable capital in Department II is not much use if we have no additional constant capital for this department, being in fact engaged on the task of finding it. For another thing, our present concern is to see if we can find in Department II a source of money for the purchase of additional means of production from I, and Department II's problem how to place its own additional product in some way or other in the process of production is beside the point. Further, is the implication that the respective consumer goods should be used 'direct', i.e. without the mediation of money, in the production of Department II, so that the corresponding amount of money can be diverted from variable capital to the purpose of accumulation? If so, we could not accept the solution. Under normal conditions of capitalist production, the remuneration of the workers by consumer goods direct is precluded, one of the corner-stones of capitalist economy being the money-form of the variable capital, the independent transaction between the worker as buyer of commodities and producer of consumer goods. Marx himself stresses this point in another context: 'We know that the actual variable capital consists of labour-power, and therefore the additional must consist of the same thing. It is not the capitalist of I who among other things buys from II a supply of necessities of life for his labourers, or accumulates them for this purpose, as the slave holder had to do. It is the labourers themselves who trade with II.'[131] And that goes for the capitalists of Department II just as much as for those of Department I, thus disposing of Marx's last effort. Marx ends up by referring us to the last part of _Capital_, volume ii, chapter 21, the 'Concluding Remarks _sub iv_', as Engels has called them. Here we find the curt explanation: 'The original source for the money of II is _v + s_ of the gold producers in Department I, exchanged for a portion of II_c_. Only to the extent that the gold producer accumulates surplus-value or converts it into means of production of I, in other words, to the extent that he expands his production, does his _v + s_ stay out of Department II. On the other hand, to the extent that the accumulation of gold on the part of the gold producer himself leads ultimately to an expansion of production, a portion of the surplus-value of gold production not spent as revenue passes into Department II as additional variable capital of the gold producers, promotes the accumulation of new hoards in II and supplies it with means by which to buy from I without having to sell to it immediately.'[132]