Document XOam7v7ON5roaQEk6QqwkRQvd

August 5, 1938 Hr. D. J. Bussey, General Superintendent Experimental Test Department Pratt and Whitney Airoraft Bast Hartford, Conn. Dear Bussey: I'any thanks for yours of August 3 concerning spark plug cleaning. Vie should bo interested in knowing from just what part of the spark plug cleaning apparatus the dust sample forwarded with your letter of July 2Q was collected. This 5.nfomation will give us some idea of the adequacy of the ventilating system described in your letter of August 3. I hope to be at Pratt and Whitney within the next few weeks and should very much like to inspect the apparatus in question. Yours very truly. SDH:GPU CC: Dr. Maehle Mr. S. D. Huron Ethyl Gasoline Corporation Research Laboratories 723 East Milwaukee Ave. Detroit, Michigan Dear Mr. Heron: In reply to your letter of July 23 regarding the possible health, hazards connected with our spark plug cleaning opera-* tion, the cleaning fixture is a double ended grinder with a chuck at one end and a wire brash whaol at the other sad. The duct froxa tha blower is connected by a Y to ducts which cover both ends of this grinder. The dusty air is discharged 20 feet above the ground level and the vacuum measured at the Y is 8.2 ii20. If you require further information we will be glad to furnish it. Thank you very nuoh for your coiaaents. Very truly PRATT h SJBserg ccs Dr. W. F 2&.ohle E. J. Busaey General Superintendent ~ Experimental Test Department HE 0009096 N9910.01