of England. The stocking frame invented in 1589 for silk became viable when in 1759, Jedediah Strutt introduced an attachment for the frame which produced what became known as the Derby Rib, that produced a knit and purl stitch. This allowed stockings to be manufactured in silk and later in cotton. In 1768, Hammond modified the stocking frame to weave weft-knitted openworks or nets by crossing over the loops, using a mobile tickler bar- this led in 1781 to Thomas Frost's square net. Cotton had been too coarse for lace, but by 1805 Houldsworths of Manchester were producing reliable 300 count cotton thread. 19th-century developments With the Cartwright Loom, the Spinning Mule and the Boulton & Watt steam engine, the pieces were in place to build a mechanised woven fabric textile industry. From this point there were no new inventions, but a continuous improvement in technology as the mill-owner strove to reduce cost and improve quality. Developments in the transport infrastructure; that is the canals and after 1831 the railways facilitated the import of raw materials and export of finished cloth. Firstly, the use of water power to drive mills was supplemented by steam driven water pumps, and then superseded completely by the steam engines. For example, Samuel Greg joined his uncle's firm of textile merchants, and, on taking over the company in 1782, he sought out a site to establish a mill.Quarry Bank Mill was built on the River Bollin at Styal in Cheshire. It was initially powered by a water wheel, but installed steam engines in 1810. Quarry Bank Mill in Cheshire still exists as a well-preserved museum, having been in use from its construction in 1784 until 1959. It also illustrates how the mill owners exploited child labour, taking orphans from nearby Manchester to work the cotton. It shows that these children were housed, clothed, fed and provided with some education. In 1830, the average power of a mill engine was 48 hp, but Quarry Bank mill installed a new 100 hp water wheel. William Fairbairn addressed the problem of line-shafting and was responsible for improving the efficiency of the mill. In 1815 he replaced the wooden turning shafts that drove the machines at 50rpm, to wrought iron shafting working at 250 rpm, these were a third of the weight of the previous ones and absorbed less power. Secondly, in 1830, using an 1822 patent, Richard Roberts