Document dRJ0BjmvaRbznbe0EkM0aMae

PRATT AND WHITNEY AIRCRAFT East Hartford, Conn C 0 p Y July 26, 1938. Ethyl Gasoline Corporation Detroit, Michigan Attention: Mr. S.D, Heron Gentlemen: As a precaution we have installed a blower on our spark plug reconiitioning bench to pull the dust from the cleaning apparatus and discharge through the roof of the building, I am inclosing a sample of this dust and wonder whether you would please analyze it and report whether or not there might be a health hazard connected with this job. Thanking you for any comments you might care to make. Veiy truly yours, PRATT AND WHITNEY AIRCRAFT (Signed) S.J. Bussey General Superintendent Experimental Test Department EJB:a Inc.