Ventilation is notoriously bad in those factories where previously only men were employed, but new and large factories, particularly where there is a Welfare Worker, show much improvement, and under such conditions headaches are said to be rare. Defective eyesight is a frequent cause of headaches, and here again a careful Welfare supervisor can do much good by advising a visit to the optician or eye hospital. Clothing operatives are especially liable to eye-strain, and care in lighting arrangements is very necessary. Mending in the worsted industry is also trying for the eyes. In one large mill visited a superior woman overlooker was in charge of the mending and burling, and she was careful to vary the work so that the tedious pieces did not always come to the same girls. By this means, and by the use of eye-shades to keep off the glare of the light, she finds headaches can be largely prevented. It is to be feared that such care is not general in the industry, as a Trade Union representative reports that headaches are very common. _Nervous Disorders._--The evidence here is extremely scanty. One doctor drew attention to the danger of automatism. When very monotonous and restricted movements are employed, a whole room of girls may become nervous and hysterical. He has known this to occur in the making of nails, where the difference between the various processes is so slight that the monotony cannot be obviated by periodically transferring the girls to different kinds of work. Two other witnesses drew attention to the effect of piece-work at high pressure in causing a tendency to hysteria and other nerve disorders, and doffing in the worsted spinning rooms is said to be responsible for the noisy excitability which is so marked among the younger boys and girls. The more common experience, however, is the absence of nervous disorders among industrially employed girls. Various doctors in Lancashire and Welfare Workers and others in Birmingham and Coventry commented on this, and recorded their conviction that the social influences at work, cheerful companionship and an increased interest in life, are powerful antidotes to possible nervous afflictions.