DEPARTMENT OF PHYSIOLOGY HARVARD UNIVERSITY SCHOOL OF PUBLIC HEALTH 55 VAN DYKE STREET BOSTON, MASSACHUSETTS Dr.

March 5, 1934 Dr* Graham Edgar Ethyl Gasoline Corporation Chrysler Building Hew York Qtty New xork Dear Dr.

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SAFETY DIVISION Ro b e r t A.

Et h y l Ga s o l in e Co r p o r a t i Ch r y s l e r Bu il d in g 405 Le x in g t o n Av e n u e 1 Ne w Yo r k July 17th, 1935 Or* Robert A Kehoe Dear Dr.

IRVING GRAY, M.D..

January 29, 1931 Mr* Thomas K.

Th e A n a c o n d a Co mpa n y P.O.

Et hyl Ga so l ine Co r po r at io n Chr ysl er Buil ding 135East 42*iPSt r eet N e w Y o r k April 5, 1934.

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June 5*1939 Mr, W* A.

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August 7* 1939 Dr .

Th e jou rn al of Industrial H ygien e Editor for the United States D a v id L.