therefore does not depend upon wages, but upon amount of labor. The working class renders to the capitalist class a greater amount of value than it receives in wages and thus the profit of capital as of all other forms of the appropriation of unpaid for products of labor is to be explained on the simple ground of the surplus value discovered by Marx.
VI. Simple and Compound Labor
(The argument of Duehring against which Engels here directs his efforts may be best summed up in Duehring's concluding words "Marx in his utterances on value cannot escape the lurking ghost of highly skilled labor. The prevalent notion of the intellectual classes has been a hindrance to him in this matter, for according to this idea it is an enormity to reckon the labor time of a barrow pusher and an architect as economic equivalents.")
Engels thereupon says "the passage in the works of Marx which caused this outbreak on the part of Duehring is very short. Marx is examining the question as to the basis of the value of commodities and answers it by the statement that it is the amount of human labor contained in them. "This" he goes on "is the expression of that simple labor force which belongs to the average human being without any special devolpment. Skilled labor is a power or rather a multiple of simple labor, so that a small amount of skilled labor is equivalent to a larger amount of unskilled labor. Practice shows that this reduction to the terms of unskilled labor takes place. A commodity may be the product of skilled labor, its value may be equivalent to a product of unskilled labor skilled labor. The proportion in which different forms of labor are reduced to their general standard in un-
