Department II, in turn, after selling these consumer goods to the value of 100, is now in a position to acquire additional means of production to the same amount from Department I. And in fact, Department I still has precisely one hundred of its surplus product left over which now find their way into Department II, enabling the latter to expand its own reproduction as well. Yet here, too, the additional means of production alone are not much use; to make them operate, additional labour power is needed. Assuming again that the previous composition of capital has been maintained, with a ratio of 2 to 1 as regards constant and variable capital, additional labour to the tune of 50 is required to work the additional 100 means of production. This additional labour, however, needs additional consumer goods to the amount of its wages, which are in fact supplied by Department II itself. This department must therefore produce, in addition to the 100 additional consumer goods for the new workers of Department I and the goods for the consumption of its own workers, a further amount of consumer goods to the tune of 50 as part of its aggregate product. Department II therefore starts on enlarged reproduction at a rate of _1,600c + 800v_. Now the aggregate product of Department I (6,000) has been absorbed completely. 5,500 were necessary for renewing the old and used-up means of production in both departments, and the remaining 500 for the expansion of production: 400 in Department I and 100 in Department II. As regards the aggregate product of Department II (3,000), 1,900 have been used for the increased labour force in the two departments, and the 1,100 consumer goods which remain serve the capitalists for their personal consumption, the consumption of their surplus value. 500 are consumed in Department I, and 600 in Department II where, out of a surplus value of 700, only 150 had been capitalised (100 being expended on means of production and 50 on wages). Enlarged reproduction can now proceed on its course. If we maintain our rate of exploitation at 100 per cent, as in the case of the original capital, the next period will give the following results: I. _4,400c + 1,100v + 1,100s = 6,600_ II. _1,600c + 800v + 800s = 3,200_ ----- Total: 9,800