The first enlargement of reproduction gave the following picture: I. _4,400c + 1,100v + 1,100s = 6,600_ II. _1,600c + 800v + 800s = 3,200_ ----- Total: 9,800 This already clearly expresses the interdependence of the two departments--but it is a dependence of a peculiar kind. Accumulation here originates in Department I, and Department II merely follows suit. Thus it is Department I alone that determines the volume of accumulation. Marx effects accumulation here by allowing Department I to capitalise one-half of its surplus value; Department II, however, may capitalise only as much as is necessary to assure the production and accumulation of Department I. He makes the capitalists of Department II consume 600_s_ as against the consumption of only 500_s_ by the capitalists of Department I who have appropriated twice the amount of value and far more surplus value. In the next year, he assumes the capitalists of Department I again to capitalise half their surplus value, this time making the capitalists of Department II capitalise more than in the previous year--summarily fixing the amount to tally exactly with the needs of Department I. 500_s_ now remain for the consumption of the capitalists of Department II--less than the year before--surely a rather queer result of accumulation on any showing. Marx now describes the process as follows: 'Then let Department I continue accumulation at the same ratio, so that 550_s_ are spent as revenue, and 55_s_ accumulated. In that case, 1,100 I_v_ are first replaced by 1,100 I_c_, and 550 I_s_ must be realised in an equal amount of commodities of II, making a total of 1,650 I(_v + s_). But the constant capital of II, which is to be replaced, amounts only to 1,600, and the remaining 50 must be made up out of 800 II_s_. Leaving aside the money aspect of the matter, we have as a result of this transaction: 'I. _4,400c + 550s_ (to be capitalised); furthermore, realised in commodities of II for the fund for consumption of the capitalists and labourers of I, 1,650 (_v + s_). 'II. _1,650c + 825v + 725s_.