roads and water carriage; or, finally, the population too poor, that is, their collective labour too little effective, to admit of their being large consumers. Indolence, want of skill, and want of combination of labour, among those who would otherwise be buyers of a commodity, limit, therefore, the practical amount of combination of labour among its producers. In an early stage of civilization, when the demand of any particular locality was necessarily small, industry only flourished among those who by their command of the sea-coast or of a navigable river, could have the whole world, or all that part of it which lay on coasts or navigable rivers, as a market for their productions. The increase of the general riches of the world, when accompanied with freedom of commercial intercourse, improvements in navigation, and inland communication by roads, canals, or railways, tends to give increased productiveness to the labour of every nation in particular, by enabling each locality to supply with its special products so much larger a market, that a great extension of the division of labour in their production is an ordinary consequence.
The division of labour is also limited, in many cases, by the nature of the employment. Agriculture, for example, is not susceptible of so great a division of occupations as many branches of manufactures, because its different operations cannot possibly be simultaneous. One man cannot be always ploughing, another sowing, and another reaping. A workman who only practised one agricultural operation would be idle eleven months of the year. The same person may perform them all in succession, and have, in most climates, a considerable amount of unoccupied time. To execute a great agricultural improvement, it is often necessary that many labourers should work together; but in general, except the few whose business is superintendence, they all work in the same manner. A canal or a railway embankment cannot be made without a combination of many labourers; but they are all excavators, except the engineers and a few clerks.
