The Leeds Industrial Museum at Armley Mills is on the River Aire and fronts onto the Leeds and Liverpool Canal. When built in 1805 it was the largest woollen mill in the world with 18 fulling stocks and 50 looms. It contains a collection of textile machines. A 73 inch loom has 1606 individual warp threads that must be wound (warped) tidily onto the back beam. The warping process does this.