is not a symbol, no more than the commodity aspect of a use-value is a symbol. That a social relation of production takes the form of an object existing outside of individuals, and that the definite relations into which individuals enter in the process of production carried on in society, assume the form of specific properties of a thing, is a perversion and by no means imaginary, but prosaically real, mystification marking all social forms of labor which creates exchange value. In money this mystification appears only more strikingly than in commodities. The necessary physical properties of the particular commodity in which the money form of all other commodities is to be crystallized―as far as they are directly determined by the nature of exchange value―are: divisibility to any desired extent, homogeneity of its parts, and uniformity of all the specimens of the commodity. As an embodiment of universal labor-time it must be homogeneous in its structure and capable of representing only quantitative differences. Another necessary property is durability of its use-value, as it must last through the process of exchange. The precious metals excel in these qualities. Money not being a result of a scheme or agreement, but having been produced instinctively in the process of exchange, a great variety of more or less unsuited commodities had successively performed its functions. At a certain stage of development of the process of exchange, the necessity arises for a polar distribution of the functions of exchange value and use-value among commodities, so that one commodity e. g. should act as a medium of exchange, while another is being alienated as a use-value. This necessity brings it about that one or even several commodities possessing the most generally accepted use-value, begin, incidentally at first, to play the part of money. Even if not direct means of satisfying existing wants, their being the most considerable material constituent part of wealth, insures to them a more general character than to the other use-values.