Document pejEBNONkL57jgx4ywLmdgQZd

Page 321 1 Mr. McGowan talked about this briefly, but, 2 in 1938, a gentleman by the name of Dreessen did a 3 study at asbestos textile mills, and he addressed the 4 second question or, really, what concentration of 5 asbestos dust can be tolerated without any injury to 6 your health. 7 To answer this question, Dr. Dreessen went 8 to asbestos textile mills, and he measured the dust 9 with the best process that they had available then, 10 midget impingers and other items that they used to 11 find out what dose of asbestos people were exposed 12 to. 13 And the second thing that they did was, they 14 examined the X-rays of the workers and looked for the 15 presence or absence of disease in those workers. 16 Did anybody in these textile mills get 17 sick? Well, yes, they did. Some of these people had 18 asbestosis. 19 When the researchers matched up the amount 20 of exposure people had with the disease, they reached 21 an interesting conclusion.