Mar oh 1 3 , 19 38 Dr, A, J, L*mza _ As s is t a n t Med ical d ir e ct o r ?

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V 1 April 17, 19S1 Sr* A, iw Mewton, Jr., Sterling Oil Company, Easlenton, Pa.

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REPORT OF THE PROGRESS OF AN INVESTIGATION TO DEVELOP A STANDARD FOR THE TOLERABLE CONCENTRATION OF IEAD IN THE AMBIENT AIR '' ' 'A' ' '' The American Petroleum Institute - Project L-6 Lead Industries Association - Project LH-75 THE FATE OF INHALED PARTICULATE LEAD COMPOUNDS ; IN THE HUMAN RESPIRATORY TRACT 1 Prepared by , Robert A.

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M.artjs ville TOk io April 1, I S k y Dr Robert A ICehoe University of Cincinnati Kettering Laboratory of Applied Physiology Cincinnati Ohio Dear Doctor Ilehoe: Thank you for your very informative letter of Larch 2c. vie would life to have our research man stop down to see you and discuss our problem in more detail.

1 Ms-ai-per-BEP Te l e ph o n s n a t io n a l 2 3 2 6 BOX 6 8 0 B e n ja m in F r a n k l in S t a t io n W A SH IN GTO N , D.

`Red (th-and LINE \ ........ \>-/ V W.C.

Dr, Bonnard Teagarden 1 East Ninth Street Hew York, New York Dear Doctor Teegarden: I am sending you two mailing tubes arrive in good condition.

S A F E TY COMMITTEE O.B.Lewis CHAIRMAN Et h y l Ga s o l i n e Co r p o r a t i o n Ch r y s l e r B u i l d i n g 405Lexingt on Avenue Ne w Yo r k Novem ber 2U, 19 3 7 D r .

act Messrs* B* B.

STATE O F CALIFORNIA DEPARTMENT O F PUBLIC HEALTH M ALCOLM H .