IN D U S T R IA L H Y G IE N E F O U N D A T IO N O F A M E R IC A , INC. 4400 Fi f t h Av e n u e Pi t t s b u r g h 13, Pa .

August 8, 1944 Mr.

PRESIDENT HP.i'tJt.HsbS. .uSrBCguhHr,RePaEeuNnKonf.syMPlvH;na.ensiDa.

/ September 14, 1942.

EFFEC T OF THE FOURTH MILLIMETER ON GASOLINE T EL CONCENTRATIONS Introduction Petroleum refin ers currently a re licensed to use up to 3.0 m iilileters of te tra ethyllead per gallon in autom otive g asolines.

June 10, 1944 19 Mr'.'

ETHYL CORPORATION CHRYSLER BUILDING 405 LEXINGTON AVENUE NEW YORK 17 June 7, 1911 TO ALL DIVISION MANAGERS COPY FOR MR.

Buen os A i r e s ,O ctober 2 3 r d ,1941 Dr.W .S.Dove Apartado Aereo 100 Colom bian P etr oleu m Company Cu cu ta, Colombia Dear Dr.Dove, Colom bian P etr oleu m Company h as a d v ise d me t h a t you h ave replaced Dr,E,H urtado as M edical D ir e ct o r .

U n iv ersity of C in cin n ati C o lleg e o f M edicine K e tte rin g Lab. o f A pplied P h y sio lo g y Eden Avenue O ctober 28, 1941 D r.

April 2k, 1939 Dr, Henri Giroire 2 Hue Scribe * Hantes (Loire Inferieur) France Dear Doctor Giroire t send you herewith the results of the analyses of the samples of urine which came to us from the plant at Paimboeuf some weeks ago, I dare say you will he gratified* as I am* to find that there are no examples of dangerously high results* As a matter of fact all of these results are well within the limits of our findings among workmen in industries that we regard as entirely safe, The mean of these results iscalso gratifying low.

TH E A SSO C IA TED ETH Y L COM PANY LIM ITED A R TIIA ER -X H O U SE, A R TILLER Y ROW, LO YDO Y, SAK 1 Jelephone : ABBEY 3 9 7 4 Jelegram s: ETHYL PORT, SOW EST.

H ovem ber I4., 19 55 Mr, John Sch a efer E th yl Gasolin e Corp ora tion Bos 688 W ilm in gton , Delaware Dear Mr, Sch a efer s ?.

ternary 3.9* 3. 937 Mr.

'sy m bo l s `,,tiis is a fa s t m essage unless its deferred ch a r acter is indicated by th e proper sym bol - W .

Et hyl Gasol ine Corporat ion Manufact ur ing and Tr affic Depar t ment J.