THE TURNOVER OF CAPITAL
THE WORKING PERIODLet us take two branches of business with working-days of equal length, say, of ten hours each, one of them a cotton spinning-mill, the other a locomotive works. In one of these branches a definite quantity of finished product, cotton yarn, is turned out daily or weekly; in the other, the labour-process has to be repeated or perhaps three months in order to manufacture a finished product, a locomotive. In one case the product is discrete in nature; and each day a week the same labour starts over again. In the other case the labour-process is continuous and extends over a rather great number of daily labour-processes which, in their interconnection, in the continuity of their operation, bring forth a finished product only after a rather long period of time. Although the duration of the daily labour-process is the same here, there is a very marked difference in the duration of the productive act, i.e., in the duration of the repeated labour-processes required to get out a finished product, to market it as a commodity, hence to convert it from productive to commodity-capital. The distinction between fixed and circulating capital has nothing to do with this. The distinction indicated would exist even if the very same proportions of fixed and circulating capital were employed in both branches of production.
These differences in the duration of the productive act can be observed not alone between different spheres of production, but also within one and the same sphere of production, depending on the amount of product to be turned out. An ordinary dwelling house is built in less time than a large factory and therefore requires fewer continuous labour-processes.
While the building of a locomotive takes three months, that of an armoured man-of-war requires one year or more. It takes nearly a year to produce grain and several years to raise big cattle, while timber-growing needs from twelve to one hundred years. A few months will suffice for a country road, while a railway is a job of years. An ordinary carpet is made in about a week, but a Gobelin takes years, etc. Hence the time consumed in the performance of the productive act varies infinitely.
The difference in the duration of the productive act must evidently give rise to a difference in the velocity of the turnover, if invested capitals are equal, in other words, must make a difference in the time for which a certain capital is advanced. Assume that a spinning-mill and a locomotive works employ the same amount of capital, that the ratio of their constant to their variable capital is the same, likewise the proportion between the fixed and circulating parts of the capitals, and that lastly their working-day is of equal length and its division into necessary and surplus-labour the same. In order to eliminate, furthermore, all the circumstances arising out of the process of circulation and having no bearing on the present case, let us suppose that both the yarn and the locomotive are made to order and will be paid on delivery of the finished product. At the end of the week, on delivery of the finished yarn, the spinning-mill owner recovers his outlay for circulating capital (leaving the surplus-value out of consideration), likewise the fixed capital's wear and tear incorporated in the value of the yarn. He can therefore repeat the same circuit anew with the same capital. It has completed its turnover. The locomotive manufacturer on the other hand must lay out ever new capital for wages and raw material every week for three months in succession, and it is only after three months, after the delivery of the locomotive, that the circulating capital, meanwhile gradually laid out in one and the same productive act for the manufacture of one and the same commodity, once more exists in a form in which it can renew its circuit. The wear and tear of his machinery during these three months is likewise replaced only now. The expenditure of the one is made for one week, that of the other is the weekly expenditure multiplied by twelve. All other circumstances being assumed as equal, the one must have twelve times as much circulating capital at his disposal as the other.
It is however immaterial here that the capitals advanced weekly are equal. Whatever the amount of the advanced capital, it is advanced for only one week in the one case and for twelve weeks in the other, and the above periods must respectively elapse before it can be used for a new operation, before the same operation can be repeated with it, or a different one inaugurated.
The difference in the velocity of the turnover, or in the length of time for which the individual capital must be advanced before the same capital-value can be employed in a new labour- or self-expansion process, arises here from the following circumstances:
Granted the manufacture of a locomotive or of any other machine requires 100 working-days. So far as the labourers employed in the manufacture of yarn or the building of locomotives are concerned, 100 working-days constitute in either case a discontinuous (discrete) magnitude, consisting, according to our assumption, of 100 consecutive separate ten-hour labour-processes.