Document 7ODwyx3M2bQkxM0NqmZ54yzZj

HARVARD MEDICALSCHOOL D EP ARTM EN T OF PEDIATRICS Ch ild ren 's H ospital 3 0 0 Jjngw tod aAvenue `Bosten,.... Jun.e...7* *93 7 Dr. Holiert A. Kehoe, Kettering Research Laboratory, University of Cincinnati Medical School, Cincinnati, Ohio. Pear Dr. Kehoe: I would appreciate so much having your opinion as to the levels of lead in spinal fluid and blood as determined by the spectroscopic method. I am interested in knowing what you regard as normal and the values above normal which would indicate that there is an excessive amount of lead in these fluids which, we are obtaining in children with clinical and roentgenological evidences of lead poisoning. - Very ^ince^ely yours Kenneth D. Blackfan, M.D