Coming back now to C—M—C, or to circulation as a whole, it is apparent that it contains the combined series of metamorphoses through which a commodity passes. But at the same time as one commodity enters the first phase of its circulation and completes its first metamorphosis, another commodity enters the second phase of circulation, completes its second metamorphosis and falls out of circulation; the first commodity enters at the same time the second phase of circulation completes its second metamorphosis and falls out of circulation, while a third commodity enters circulation, passes through the first phase of its course completing the first metamorphosis.
Thus, the combined circulation C—M—C, as a complete metamorphosis of a commodity always constitutes at the same time the end of the complete metamorphosis of another commodity and the beginning of a complete metamorphosis of a third commodity, i. e., a series without beginning or end. To illustrate this let us call C in either extreme C’ and C” respectively, in order to distinguish the commodities, the series reading thus: C’—M—C”. The first member, C’—M, presupposes in fact that M is the result of another transaction C—M, and is thus itself merely the last member of a series C—M—C’, while the second part M—C” is merely a result of C”—M, or appears as the first part of C”—M—C’”, and so on. Furthermore, although M is the result of only one sale, it appears that the last part M—C, may be represented as M—C’ + M—C” + M—C’”, etc., i. e., it may be split up into