April 16, 1929 Mr, Calvin P.'

i I n t k r -O f f ic b C O R R K S P O N U E iS iC B Et h y l '`S 0 . 1 G a s o l i n e Co r p o r a t i o n 25 Br o a d w a y Ne w Y o r k March s, isso.

E.

CR --S97S* E.

ETHYL CORPORATION RESEARCH AND DEVELOPM ENT DEPARTMENT R E SE A R C H LABORATORIES 1 6 0 0 W EST E IG H T M ILE ROAD FERNDALE 2 0 , DETROIT, MICHIGAN Ja n u a ry 25, 1962 D r.

' wswspr tit * EASTERN AIR LINES ' M ED .i1-: IivCi.#.T- -;'D " E P A R.T ME N i T ' CAYNE BLVD. 901 LEXINGTON AVE.

WEBSTER 3-6111 R I K E R L A B O R A T O R I E S , I NC.

\ Correspondence to 3 DA.YLESFOSD ROAD, GATLY 573a P R O F E S S O R R O N A L D E.

July 3} 967 O.

N14849 Dr.

vy*f, February 2 7 , 1956.

Cbu unit tee of the Pr ogr essive H air l/e Indust ry Ro o m 510-11, 60 E a s t 42n d St r e e t N e w Yo r k , N e w Yo r k 10017 M ember x Co m be Ch em ic a l .

STRICTLY CONFI DENTI AL MAY BE RELEASED ONLY BY DULY AUTHORIZED PERSONNEL ETHYL CORPORATION Inter-Office Correspondence To: Mr.

EDGEW O O D 4- 290 8 CABLE AD D RESS: W I FPO DEPARTMENT OF RES EA RCH G- D EV EL O PM EN T 1151 W EST FI FTH STREET AZU SA, CA LI FO RN I A September 28, 1960 Dr, Robert A.

U.US ESTABLISHED1802 E.