\ T.e a s s o c ia t e d e t h y l c o m pa n y l im it e d MEDICAL SERV ICES 2 0 BERKELEY S Q U A R E , L O N D O N , W.

T im floxqoiJODt&ncD Mi m i m g a m S m e l t i n g Oo m p a m t ' OF A M A A *tefim P E R SO N N E L DIVISION P .

eS TA B U S K E O S 02 E.

ETHYL CORPORATION OO PARK AVENUE BUILDING AT 41sr STREET NEWYORK17, N.

May 31* 1950 Dr, B.

Transfer of M etallic C onstituents of C ig a r e tte s t o th e Main Stream Smoke E v e r e tt C.

July 12, 1956 PERSONAL AND CONFIDENTIAL .

UNIVERSITY OF CINCINNATI DEPARTMENT OF PREVENTIVE MEDICINE AND INDUSTRIAL HEALTH COLLEGE OF MEDICINE CINCINNATI 19, OHIO Au gu st 25, 1959 M E M OR AN D UM : TO: D r .

ETHYL CORPORATION RESEA R CH AND ENG INEERING DEPARTM ENT RESEARCH LABORATORIES 1 6 0 0 W EST E IG H T M ILE ROAD FERN DALE 2 0 , DETROIT, MICHIGAN February 15, 1956 Dr.

t l e a i I ii t a sfm e s ssM a fiiiit ANDREW FLETCHER, PRESIDENT K.

Resea r c h La b o r a t o r i e s Di v i s i o n GENERAL MOTORS CORPORATION 4 8 5 WEST MILWAUKEE AVE.

January 131 1953 Dr.

Febru ary 26, 1958 Dr.

June 29, 1951 Ir.

bcc: Mr.