40 Rich Avenue Mount Vernon, Rev?

L^" <> yI V1 ETHYL CORPORATION RESEARCH LABORATORIES 1600 WEST EIGHT MILE ROAD EERNDALE 20 DETROIT.

THE ASSOCIATED ETHYL COMPANY LIMITED iliey.Ojffi/x.THE ADELPHI, LONDON, W.

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J&;'HE ASSOCIATED ETHYL COMPANY , jRejpstervdOffice: THE ADELPHI.LOlTDOSr.W.C.a LIMITED ^Address a ll comm unications u n tilJ u tth e r notice to: A R TILLER Y H O U SE, A R TILLER Y ROW, LO NDO N, S.W 1 Jelepkon: abbey 3974 Jelegmms: ETHYLPORT.SOWEST,LONDON ^Directors: N.

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HARVARD UNIVERSITY SCH O O L O F PUBLIC H EALTH Depar t ment of Indust r ial Hygiene \ 55 Shattuc\ Street Boston, Massachusetts February 10, 1941 Dr, Robert A.

IN REPLY IN G A D D R E SS D ivision of Research G rants and Fellow ships FED ERA L SECU RI T Y A GEN CY PUBLIC HEALTH SERVICE N A T I O N A L I N ST I T U T ES O F H EA L T H B e t h e s d a 14, M a r y l a n d A p ril 4 , 1949 In reply re fe r to our RG--1970 OOKFIDMTIAL D r.

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