Document JNEZz116VpnRBKaO31OgzKkQr

3J6 Vermont Street West Roxbury, Mass.,C2132 Feb. 6, 1972 Robert A. Kehoe Kettering Laboratories University of Cincinati ** Cincinnati, Ohio Dear Sir, In an article in Scientific American,Feb. 1971 written by J. J. Chisolm,M.D. he mentions your studies of lead. He states that 90% of lead ingested in the diet is not absorbed and that under "normal" conditions there is no net reten tion. In a subsequent sentence he states that the concentration of lead in bones increases with age. If lead is not retained, how does the lead content in bones increase with age? What are the abnormal conditions that lead to lead retention? Dr. Chisolm also speaks of a study in which the fecal excretion in children with severe plumbism has been k k mgm./day whereas in normal unexposed children lead in fecal excretion was ,2mgm./day. This only proves that lead is excreted from these children, not retained. I ama graduate student at Boston Uhiversity School of Nursing and I am presently researching the current status of studies of lead poisoning. I would appreciate any information you can give me on lead poisoning and any answers to my questions above. I have enclosed a return envelope. Thank you. Yours truly, Norma I. Halley N5989