R.A.

i January 29, 1955 Mr* John Sohaofar Ethyl Gasoline Corporation P* 0* Box 688 Wilmington, Delaware Dear Mr*.

Lamb, J.

C h i c x e D e t e i o p m e n t C o .

ETHYL CORPORATION lOO PARK A V EN U E B U IL D IN G AT 4Isx S T R E E T N E W Y O R K 17, N.

ANDREW FLETCHER, PRESIDENT K.

April 18, 1952 Dr.

January p i > 1950 Mr.

Dr.

April 21, 1952 Mr.

Of f i c e s J o h n s -Manviixb C or p o r a t i o n TWNTY-TWO EAST FORTIETH STREET NEW YORK 16, K.Y.

TO FROM s u b je c t ETHYL CORPORATION i i. 1D r .

Januaiy 28, 1958 Dear Dr.

April 20, 1951 Mr.

ETH YL CORP ORATION HIGHER TEL CONCENTRATIONS Since 1956 Ethyl Corporation has reported to refiners from time to time on its efforts to obtain an increase in the maximum allowable TEL concentration in motor gasoline.