Document 6RKqLv3b59KQ439wJmx33OMn3

ETHYL CORPORATION Research Laboratories 1600 West Sight Mile Road Ferhdale 20, Detroit, Michigan Dr. Robert A. Kehoe College of Medicine University of Cincinnati Cincinnati 19, Ohio Dear Dr. Kehoe: For your information end file, we are sending you herewith one copy each of our reports LTD 43-53 and 44-47 43- 53 Basic Study of the Stability of Ethyl Fluid 44- 47 Decomposition Products of Ethyl Fluids Please sign and return the duplicate of this letter to us. Very truly yours H. A. Beatty Assistant Director of Research It K 0020927