C 0 P 1 Chicago, I llin o is J u ly 29, 19UI Mr. 0 . 3 . le w i s Dear Oscar, D e c e n tly th e Mine S a fe ty A p p lia n ces Company r e p r e se n ta tiv e was in to see us and l e f t th e attach ed l i t e r a t u r e r e g a r d in g t h e ir new Comfo M etal iume R e s p ir a to r He s t a t e d th a t t h i s r e s p ir a t o r c o u ld he worn beneath a w eld er' s helm et and th a t i t g iv e s p r o te c tio n a gain st a l l metal fumes, in clu d in g lea d fumes.

/ LABORATORY OF AP P LIED P HYSIOLOGY UNIVERSITY OF CINCINNATI COLLEGE OF MEDICINE GENERAL HOSPITAL July 18, 19 Kr. 0.

<% NOMATCHES ,, genTEeTr EaAl EsTaHfYetLyLrEAuDl es NOMATCHES KEEP YOURMIND ONYOUR WORK GENERAL RULES 1.

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November 13, 1J44 Dr.

March 25* 19^3 Dr.

. _ Prendent f pal :?

Et h y l Ga s o l i n e Co r p o r a t i o n Re s e a r c h La b o r a t o r i e s 72 3 Ea s t Miu v a u k e e Av e n u e De t r o it , Mic h i g a n Ap r i l 1 1 , 1 9 40 Fi l e A 140.00 Dr .

L h a cl (. ch:u*3 t r i ex5 o n 1a t i o ta r E L l* EDGAB WOO M S E A .M M -O C x t K C BB OW NEL L . v e t BMtS'OExr U a, " B f l N O . > c t C<S - o C* T 0 6 CB T L N01.EV Z 'C C ^ C L O .

ETHYL CORPORATION Ma nuf a ct ur ing a nd Tr a f f ic Depa r t ment PLEASE ADDRESS REPLY TO CHRYSLER BUILDING AOS LEXINGTON AVE.

f * *> December 1, 195?

Shipping Dept. & Blast Furnace, saws pipe S/2Q/55 .26 rag. of lead per l.of urine - 6/30/56 .33. mg. of lead per l.of uriu Battery Room, Shoveling Dry Flue Dust 7/17/56 .31 mg. of lead per 1. of urin Battery Room, Shoveling Dry Flue Dust Furnace Operator 7/11/56 .30 mg. of lead per 1. of urin .10/25/55 .18 mg. of lead per 1 of urin 7/11/56 .22 mg. of lead per 1. of urin Lead Pots and Blast Furnace .

September 22, 193& Mr* Theo H* Eubbuch 2291 Bardstown Hoad Lou lsVille* Ky* Dear Mr* Hubbucht I have been delayed in replyin g to your le t t e r of September l8fcb sin ce I only returned to Cin cin n ati a day or two ago* I h asten to confima my speaking engagement in Lo u isv ille on the n igh t of October 13th , and I sh all be very happy to be th ere un less some unforeseen circumstance preven ts i t * I sh all t alk on the gen eral su bject of lead absorption and lead poison in g, f i r s t d iscu ssin g the lead in take and output of in dividu als outside the lead trades'.

f Dr.

Fr i g i d a i r e D i v i s i o n Gen er al Mo t o r s Co r po r at io n DAYTON.