'(1) ... the forming of such supplies and the necessity for it applies to all capitalists, those of I as well as of II. Considering them in their capacity as sellers of commodities, they differ only by the fact that they sell different kinds of commodities. A supply of commodities of II implies a previous supply of commodities of I. If we neglect this supply on the one side, we must also do so on the other. But if we count them in on both sides, the problem is not altered in any way. (2) Just as this year closes on the side of II with a supply of commodities for the next year, so it was opened by a supply of commodities on the same side, taken over from last year. In the analysis of annual reproduction, reduced to its abstract form, we must therefore strike it out at both ends. By leaving this year in possession of its entire production, including the supply held for next year, we take from it the supply of commodities transferred from last year, and thus we have actually to deal with the aggregate product of an average year as the object of our analysis. (3) The simple circumstance that the difficulty which must be overcome did not show itself in the analysis of simple reproduction proves that it is a specific phenomenon due merely to the different arrangement of the elements of Department I with a view to reproduction, an arrangement without which reproduction on an expanded scale cannot take place at all.'[125] The last remark, be it noted, is equally damaging to his own earlier attempt at resolving the specific difficulties of accumulation by moments pertaining to simple reproduction, viz. the formation of a hoard consequent upon the gradual turnover of the fixed capital in the hands of the capitalists which was previously adduced as the explanation of accumulation in Department I. Marx then proceeds to set out enlarged reproduction in the form of diagrams. But no sooner does he begin to analyse his diagram, than the same difficulty crops up anew in a slightly different guise. Assuming that the capitalists of Department II must for their part convert 140_s_ into constant capital so as to make accumulation possible for the others, he asks: 'Therefore Department II must buy 140_s_ for cash without recovering this money by a subsequent sale of its commodities to I. And this is a process which is continually repeated in every new annual production, so far as it is reproduction on an enlarged scale. Where does II get the money for this?'[126] In the following, Marx tries out various approaches in order to discover this source. First the expenditure on variable capital by the capitalists in Department II is closely scrutinised. True, it exists in the form of money; but its proper function is the purchase of labour power, and it cannot possibly be withdrawn and made to serve, maybe, for purchasing additional means of production.