But with exceptions of no consequence here, means of production and articles of consumption are wholly different kinds of commodities, products of entirely different bodily or use-forms, and, therefore, products of wholly different classes of concrete labour. The labour which employs machinery in the production of means of subsistence is vastly different from the labour which makes machinery. The entire aggregate annual working-day, whose value-expression is 3,000, seems spent in the production of articles of consumption equal to 3,000, in which no constant portion of value re-appears, since these 3,000, equal to 1,500v + 1,500s, resolve themselves only into variable capital-value and surplus-value. On the other hand the constant capital-value of 6,000 re-appears in a class of products quite different from articles of consumption, namely in means of production, while as a matter of fact no part of the social working-day seems spent in the production of these new products. It seems rather that the entire working-day consists only of classes of labour which do not result in means of production but in articles of consumption. This mystery has already been cleared up. The value-product of the year’s labour is equal to the value of the products of department II, to the total value of the newly produced articles of consumption. But the value of these products is greater by two-thirds than that portion of the annual labour which has been expended in the sphere of production of articles of consumption (department II). Only one-third of the annual labour has been expended in their production. Two-thirds of this annual labour have been expended in the production of means of production, that is to say, in department I. The value-product created during this time in I, equal to the variable capital-value plus surplus-value produced in I, is equal to the constant-capital-value of II re-appearing in articles of consumption of II. Hence they may be mutually exchanged and replaced in kind. The total value of the articles of consumption of II is therefore equal to the sum of the new value-product of I and II, or II(c + v + s) equal to I(v + s) + II(v + s), hence equal to the sum of the new values produced by the year’s labour in the form of v plus s.