Document ybD5bx2yoOYdV2kymmw7bOp3

f i HAROLD R. B0HLMAN. M. D. '2I4-J7 MEDICAL ARTS BUILDING CATHEDRAL STREET AT- READ Ba l t imo r e , Ma r y l a n d February Twentv--fiffch 1933 Dr, R, A, Kehoe: University of Cincinnati Cincinnati, Ohio Bear Doctor Kehoe: T or. taking the liberty of -writing you at the suggestion of Dr, Graham Edgar, Director of Research for the Ethyl Gasoline Corporation, Dr, Edgar tells ne that yon.are doing work on the physiological effect of exhaust gas from gasoline containing tetraethyl load, - I am partioularlv interested in this, as I have occasion to fly Hornet powered' airplanes witu short exhaust stacks , I Vv noted certain symptoms, -Pter long flights, suggesting too imch carh^nmonoxide inhalation, or ^ossihl-"the effects of lead. Dr,. Graham has very kindly forwarded - to ms the bulletin of the U. S Bureau of Mines published in 192?, and also the report of the British Ministry of Health dated 1930, I shall be greatly indebted to you if you , can pass on to me anv information which you may have gathered since these dates, particular ly with reference to the amount of lead'which can and may he absorbed by the alveolar surfaces in flying the above motors, I am, referring to Douglas Airplanes of the observation type, powered with Hornet motors. This amount of lead would appear to be considerable, since on rather damp days,* after flying for three or four hours, I have noted a distinct gray deposit all glass faces of the instruments, sufficient so that I could easily trace finger marks in the deposit, This is especially noticeable if one turns the plane so that the sun strikes on the instruments over one's shoulder. With many thanks, I am Very tnilv vour's. HRB:JC 0020114