ETHYL CORPORATION loo PARK AVENUE BUILDING AT 41st STREET NEW YORK 17, N.

June 20, 1950 Dr.

D ecem b er 15, 1958 M r , M an fred Bow ditch D ir ecto r of H ealth an d Safety Lead In d u stries A sso ciatio n 60 E a st 42nd Str eet New York 17, New York D ear M an fred : '* I am som ew h at fa m ilia r w ith th e M .S.A .

July 2, 1951 AIR MAIL Mr* H.

Ui Febr uar y 10# 1955 Mr .

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COPY <** - Dr R.

Ju n e 17, 1955 & M r.

JCIATED ETHYL COMPANY LIMITED MEDICAL SERVICES 2 0 BERKELEY SQUARE, LO N D O N , W.

Mr.

HEALTH COM M I SSI ON ER CITY O F ST.

ETHYL CORPORATION RESEARCH LABORATORI ES 1600 WEST EI GHT MI LE ROAD .

A u gu st 3, 1956 D r.

April 11, 1952 Mr.

East Texas Pulp and Paper Company Ev a d a l e,Texa s April 7, 1958 MAILING ADDRESS P.O.