Document MGL4GE5aaxYR0B5g3rkmxxzX9

Mr-. Covan Eagle Picher - Pa 7010 A diatonaeeous earth product"of the Eagle Picher Company vhich it mines and manufactures in Iievada. ' Material is used on industrial floors as an adsorbent, and Mr. Covan is anxious to know vhether there is any risk of silicosis to the user. The manufacturing process involves the use of heat up to 1850F vhich may change some of the material tc a crystalline form. I told him that unless there vas a considerable amount of crystalline silicon dioxide in it that ^the dangers vere probably small. I also told him that the material vould have to be examined to ascertain its exact nature in the finished state Hill you please call him on Monday or Tuesday _ end make a date vhen he can see you to ascertain the magnitude of the project and its probable .cost? He have looked up the literature and the risk from hatural diatomaceous earth unprocessed even in very dusty minesdoes not seem to be great. Wm. F. Ashe, M.D. 1-20-49 000525?