nifies for the industrial capital in action that the commodities into which the money is reconverted are elements of production (instruments of labour and labour-power), that, therefore, the change of form renders the function of industrial capital continuous, renders the process of production a continuous one, or a process of reproduction. This entire change of form takes place in circulation. It is this change of form that brings about the real passage of the commodities from hand to hand. But the metamorphoses gone through by productive capital within its process of production are on the contrary metamorphoses that pertain to the labour-process and are necessary to transform the elements of production into the desired product. Adam Smith clings to the fact that a part of the means of production (the instruments of labour proper) serve in the labour-process (“yield a profit to their master,” as he erroneously expresses it) without changing their bodily form and wear out only by degrees; while the other part, the materials, change and by virtue of this very change attain their destination as means of production. This difference in the behaviour of the elements of productive capital in the labour-process forms however only the point of departure of the difference between fixed and non-fixed capital, not this difference itself. That follows from the fact alone that this different behaviour exists in equal measure under all modes of production, capitalist and non-capitalist. To this different behaviour of material elements corresponds however the transmission of value to the product, and to this in turn corresponds the replacement of value by the sale of the product. That and that alone is what constitutes the difference in question. Hence capital is not called fixed because it is fixed in the instruments of labour but because a part of its value laid out in instruments of labour remains fixed in them, while the other part circulates as a component part of the value of the product.
"If it (the stock) is employed in procuring future profit, it must procure this profit either by staying with him (the employer), or by going from him. In the one case it is a fixed, in the other it is a circulating capital." (p. 189.)
What strikes one here above all is that the crudely empirical conception of profit derived from the outlook of the ordinary capitalist, which wholly contradicts the better esoteric understanding of Adam Smith. Not only the price of materials and that of the labour-power is replaced in the price of the product, but also that part of value which is transferred by wear and tear from the instruments of labour to the product. Under no circumstances does this replacement yield profit. Whether a value advanced for the production of a commodity is replaced entirely or piecemeal, at one time or gradually, by the sale of that commodity, cannot change anything except the manner and time of replacement. But in no event can it transform that which is common to both, the replacement of value, into a creation of surplus-value. At the bottom of it all lies the commonly held idea that, because surplus-value is not realised until the product is sold, until it circulates, it originates only from sales, from the circulation. Indeed the different manner of origination of profit is in this case but a wrong way of expressing the fact that the different elements of productive capital serve differently, that as productive elements they act differently in the labour-process. In the end, the difference is not derived from the process of labour or self-expansion, not from the function of productive capital itself, but it is supposed to apply only subjectively to the individual capitalist, to whom one part of capital serves a useful purpose in one way, while another part does so in another way.
Quesnay, on the other hand, had derived these differences from the process of reproduction and its necessities. In order that this process may be continuous, the value of the annual advances must annually be replaced in full out of the value of the ann