Document DGBJNmZb6z3qRewDGD3jJ652O

Page 3372 1 where raw asbestos was turned into products, friction 2 products like clutches and brakes, cloth, insulation 3 products, things in which asbestos had been a useful 4 material for the purpose desired. 5 He looked at the plants, he measured the 6 levels of dust of the various operation, and he found 7 in some instances that the levels of dust were 8 astronomically high, thousands of fibers per 9 milliliter of air in areas such as dumping out sacks 10 of raw asbestos and so forth. 11 He found other areas where there were lesser 12 levels of dust and some areas where the levels of dust 13 were small or even nonexistent. 14 In examining the workers, he found a number 15 of cases of lung fibrosis, about a quarter of the 16 workers or more had evidence either on X-ray or on 17 clinical exam of diffuse lung scarring. 18 He found a relationship between the level of 19 exposure and the amount of disease. Very high dusty 20 areas, a large proportion of the workers had disease; 21 the disease was more severe and people took fewer