It is not possible to form a very accurate estimate of the relative importance of the different industries as measured either by the money value of their products, or by the amount of labour engaged in producing them. Eighteenth century statistics, as we saw, furnished no close estimate of the total income of the nation or of the value of home industries. Since no direct census of the English population was taken before 1805, the numbers were never exactly known, and eighteenth century economists spent much time and ingenuity in trying to ascertain the growth of population by calculations based upon the number of occupied houses, or by generalising from slender and unreliable local statistics, without in the end arriving at any close agreement. Still less reliable will be the estimates of the relative size and importance of the different industries. Two such attempts, however, one slightly prior to the special period we are investigating, and one a little later, may be taken as general indications of the comparative importance of the great divisions of industry, agriculture, manufacture, distribution or commerce. The first is that of Gregory King in the year 1688. King's calculation, however, can only be regarded as roughly approximate. The quantity of combined agriculture and manufacture, and the amount of domestic industry for domestic consumption, renders the manufacturing figures, however carefully they might have been collected, very deceptive. The same criticism, though to a less degree, applies to the estimate of Arthur Young for 1769. [Illustration] If to Young's estimate of the population dependent upon agriculture we add the class of landlords and their direct dependents and a proper proportion of the non-industrious poor, who, though not to be so classed in a direct measurement of occupations, are supported out of the produce of agriculture, we shall see that in 1769 we are justified in believing that agriculture was in its productiveness almost equivalent to the whole of manufactures and commerce. In turning to the several branches of manufacture, the abnormal development of one of them, viz. the woollen, for purposes of foreign trade, marks the first and only considerable specialisation of English industry before the advent of steam machinery. With the single exception of woollen goods almost the whole of English manufactures were for home consumption. At the opening of the eighteenth century, and even as late as 1770, no other single manufacture played any comparable part in the composition of our export trade. According to Chalmers,[16] in the period 1699-1701, the annual value of woollen exports was over two and a half million pounds, or about two-fifths of the total export trade, while in 1769-71 it still amounted to nearly one-third of the whole, giving entire or partial employment to no fewer than "a million and a half of people," or half of the total number assigned by Young to manufacture.