The same activity manifested itself in the manufacture of wool. This had hitherto been the leading department of English industry, but the quantities formerly produced are as nothing in comparison with that which is now manufactured. In 1782 the whole wool crop of the preceding three years lay unused for want of workers, and would have continued so to lie if the newly invented machinery had not come to its assistance and spun it. The adaptation of this machinery to the spinning of wool was most successfully accomplished. Then began the same sudden development in the wool district, which we have already seen in the cotton districts. In 1738 there were 75,000 pieces of woollen cloth produced in the West Riding of Yorkshire; in 1817 there were 490,000 pieces, and so rapid was the extension of the industry that in 1834, 450,000 more pieces were produced than in 1825. In 1801, 101,000,000 pounds of wool (7,000,000 pounds of it imported) were worked up; in 1835, 180,000,000 pounds were worked up; of which 42,000,000 pounds were imported. The principal centre of this industry is the West Riding of Yorkshire, where, especially at Bradford, long English wool is converted into worsted yarns, etc.; while in the other cities, Leeds, Halifax, Huddersfield, etc., short wool is converted into hard-spun yarn and cloth. Then come the adjacent part of Lancashire, the region of Rochdale, where in addition to the cotton industry much flannel is produced, and the West of England which supplies the finest cloths. Here also the growth of population is worthy of observation: Bradford contained in 1801 29,000, and in 1831 77,000 inhabitants. Halifax ,, ,, 68,000, ,, ,, 110,000 ,, Huddersfield ,, ,, 15,000, ,, ,, 34,000 ,, Leeds,, ,, 53,000, ,, ,, 123,000 ,, And the whole West Riding 564,000, ,, ,, 980,000 ,, A population which, since 1831, must have increased at least 20 to 25 per cent. further. In 1835 the spinning of wool employed in the United Kingdom 1,313 mills, with 71,300 workers, these last being but a small portion of the multitude who are supported directly or indirectly by the manufacture of wool, and excluding nearly all weavers.