Document Rgo28N3pExVo3dmNLNMpnL8E

Et hyl Gasol ine Corporat ion Rksear oh Labor at or ires 72) East Mil waukkb Avenit k De t r o it , Mic h ig a n' July 29, 1938. Dr. W.F. ^aohle College of Medicine University of Cincinnati Cincinnati, Ohio. Dear Machie: Some time ago I found that Pratt and Whitney were removing lead deposit from spark plug cores with sand-paper. This operation wa3 not protected with suction ventilation. You will note from the attached correspondence that they have now installed a fan and are getting somewhat worried about the job. You will note from my reply that I have been rash enough to express opinions on the hazards of this operation. The correspondence is forwarded for your information and I do not expect a reply unless you feel that I have made any dangerous suggestions. Yours sincerely, SDH:EEL S.D. Harn KE 0009092