erected the farm-buildings; the hedgers and ditchers who made the fences necessary for the protection of the crop; the miners and smelters who extracted or prepared the iron of which the plough and other instruments were made. These, however, and the plough-maker, do not depend for their remuneration upon the bread made from the produce of a single harvest, but upon that made from the produce of all the harvests which are successively gathered until the plough, or the buildings and fences, are worn out. We must add yet another kind of labour; that of transporting the produce from the place of its production to the place of its destined use: the labour of carrying the corn to market, and from market to the miller's, the flour from the miller's to the baker's, and the bread from the baker's to the place of its final consumption. This labour is sometimes very considerable: flour is transported to England from beyond the Atlantic, corn from the heart of Russia; and in addition to the labourers immediately employed, the waggoners and sailors, there are also costly instruments, such as ships, in the construction of which much labour has been expended: that labour, however, not depending for its whole remuneration upon the bread, but for a part only; ships being usually, during the course of their existence, employed in the transport of many different kinds of commodities.
To estimate, therefore, the labour of which any given commodity is the result, is far from a simple operation. The items in the calculation are very numerous—as it may seem to some persons, infinitely so; for if, as a part of the labour employed in making bread, we count the labour of the blacksmith who made the plough, why not also (it may be asked) the labour of making the tools used by the blacksmith, and the tools used in making those tools, and so back to the origin of things? But after mounting one or two steps in this ascending scale, we come into a region of fractions too minute for calculation. Suppose, for instance, that the same plough will last, before being worn out, a dozen years. Only
