Document Qk9wKr7GKVZMe5QOXaEv4Kxg8

MEDICAL EXAMINM'S CFFICE 9th. Ave. * 12th. St. Altoona, ?enna. November 23, 1951 Frank Princi, M. d . University of Cincinnatii Kettering laboratories gear Ur. Princi: Thank you for your letter of November 20, 1951. My apologies for having misinformed you. The reports referred to were misplaced but have bem found. I also note that at the time these samples were sub mitted, I also submitted samples from these same individuals to our laboratories and to Dr. Hamlin. I am sending these comparative results for your study. You might like to comment. May I, in the near future, submit some other bloods for comparative studies. I feel that by this exchange of information can we maintain a fairly satisfactory check on our laboratory and findings. AGC/mb Att: Sincerely yours, Medical Examiner in ]j> HE 0020312 w Comparative Blood Analysis for Lead Concentration Sampled 11-14-50 Gamma lead per 100 grams of -whole blood American Brake University of Cincinnati P.R.R. Shoe Co. College of Medicine Gamma Gamma Gamma Polarograph Polarograph Spectrograph DitMzone Method Method Method Method 84 72 85 65 67 60 40 . 60 40 95 40 40 88 96 55 55 Urine Samples, P. R. R. only, milligrams of lead per 1000 c. c. 0,4S - 11-14-50 0.38 - 11/14/50 0.06 - 11-14-50 0.15 - 11-14-50 0.04 - 11-24-50 0.13 - 12-7-50 0.05 - 12-7-50 0.05 - 11-20-50 0020313 N20709.01