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Dr. Robert A. Kehoe, Director, Kettering Laboratory of^Applied Physiology, College of Medicine, University of Cincinnati, Cincinnati 19, Ohio.
Dear Doctor Kehoe:
Referring to my letter to you of May 14th, I enclose copy of Safe Practice Bulletin No. 52 "Lead Poisoning, Part 1", issued by the Department of Labor and Industry of the Common wealth of Pennsylvania.
Thanking you for your courtesy in this matter and with kind
personal regards, I am
,
Very truly yours,
AI57H/h
Chief Medical Examiner.
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they a l l o ^ t h e samples to stand, but I do not regard this as satis factory technique, since during this period the blood can and does undergo certain chemical changes which might well alter the dlstri-