208 



TEXTILE FIBRES. 



more sensitive than those of other staples, and the exact temperature 

 that will suit the washing of the fibres is best tested by experience. 



The wools intended for worsted spinning are better with latent than 

 strong felting properties. 



Fig. 134. Woollen yarn scoured and purified (magn.). 



In woollen spinning, generally, felting is a potent factor in most 

 makes of cloth, where milling up is essential; but in worsteds, wools 

 that have fewer felting scales, but otherwise of good, long, and fine 

 staples, are often preferred on account of their excellent lustre. 



Fig. 135. Woollen yarn (rnagn.). 



[When wool has been thoroughly washed it assists the operation of 

 dyeing, and prevents certain faults appearing in the cloth when dyed, 

 such as flecks or stripes. The appearance of the two latter is often to be 



