COPY w as a P a 't i e r r t a t t h e Mayo C l i n i c O c t o b e r t e n t h t o fo u ^ e e ^ n ^ o P N o v e m b e r 1932, August t w e n t y - fir st to O ctober t w e l f t h , 1 9 3 3 , Ja n u a r y se c o n d t o A p r i l t w e l f t h , 1 9 3 4 , May 7 t h t o A u gu st t h i r t i e t h , 1934, Ju n e n in t h and t e n t h , 1935.

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potiit d e N e m o u r s & Co m pa n y IN C O R PO R A T E D Wil m in g t o n , De l a w a r e R EOICAL S l S t C T O R 'S O F F ICE April 24, 1939 Dr.

Sr.

\ m,Hovember 1933 I am afraid that I am unable to reply Intelligently to the question In your letter of November ljth.

Filling Station Ethyl 1927 - 1929 Lead in Urine rags.

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Jun e 13, X93+1 b p . .Joseph k e lso n 1<?

THEOCEANACCIDENTANDGUAIlRAnNTSEECORPORATION,LIMITED ONE PARK AVElNilUE, NEW YORK HEN-- RY/.

May 13, 191i-2 Mr.

February 2, 1962 Dr.

A October 16, 1961 Air Mail.

March 7, 1932 Mr.

July 16, 1946 ' C r-* * ` d /O D r .

August il# 19^2 Mr Philip Drinker , Harvard University School of Public Health, 55 Shattuck Street, Boston, Mass* .