Document QXLZ21xQnjRDM7oRz96xqneO4

ugU3t 1, 1953 Dp . George P. Rouse 2031 Locust Street Philadelphia, Pa. Dear Doctor Rouse; I am sending you herewith the results of the analysis of tbs urine and blood of an interpretation of the together with In commenting on the attached report and its recorded interpretation, I believe it may be of interest to you to call attention specifically to the "low normal" con centration of lead in the urine. Thl3 is no surprise to me, and it will not surprise you, but it is of some con sequence to recognize that, following the absorption of significant quantities of tetraethyl lead from any source, or over any length of time, the concentration of lead in the blood undergoes little or no change, while the urinary lead concentration goes to high levels which vary with the severity of the exposure. This result, therefor is doubly significant. C ordially yours, RAK:S3 ITobert A7~lio'aoe~} RT~d 7