March 21, 1958 Mr* 0 .

, .V-* I, Mr.

ETHYL CORPORATION 100 P A R K A V EN U E BU I LD I N G AT 41st ST R E E T NEW YORK 17, N.

sJ.

; .'

THEMEDICALCENTER Ch a r l e s A.

THEAMERICANPUBLICHEALTHASSOCIATION, inc.

LOU IS I.DUBLIN 't h ir d V i c e - P r e s i d e n t an d .

A.

The Shell Co. of Singapore Ltd. } Singapore Branch, MacDonald House, Orchard Road, SINGAPORE. 7th October 1950 The Shell Co. of Singapore Ltd., Shell House, Collyer Quay, SINGAPORE.

March 9, 1959 Dr.

\ I NT ER- OF FI CE CORRESPONDENCE Et hyl Ga so l ine Co r po r at io n Chr ysl er Buil ding 135East 42iPSt r eet "Ne w York March 20, 1954.

IN TE R -O F F ICE CO R R E SP O N D E N CE Et h y l Ga s o l i n e Co r p o r a t i o n ` orx-- Ch r ysl er buil ding 135 Ea st 4 2 n d St r eet N E W Y o r k March 15, 1952.

A p r il 9, 1957 D r .

JOSEPH COHEN CHARLES S.