Document NGB311XZKLyN93KxrxGmZxaqw

June 30, 1969 Mr. H. S. Hesselberg Ethyl Corporation 1600 West Eight Mile Road Ferndale, Michigan 43220 Dear Howard: I send herewith the article by C. C. Patterson of which we spoke. I had a few copies struck off; but since Z have no idea of the number you need; I'm sending only one; which I believe is suitable for reproduction In any number you may wish to have. You need not return the copy which I am sending. You will note that there is no name or date on the manuscript, and it is possible that it will not be published. I should think it likely that it will be, however, in some form, and in any case, a considerable number of people received the copies provided for those who attended the meeting of the Philosophical Society, It was good to see you in New York and to meet again my friends in Ethyl Corporation, and the guests. With best regards. Sincerely, RAKjwp enclosure Robert A. Kehoe, M.D. Professor Emeritus of Occupational Medicine N13336