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LEAD INDUSTRIES ASSOCIATION 420 Lexlm gton Aven u e New York 17, N. Y. MANF RED BOWDI T CH D IR EC T O R O F H EA LTH A N D SA F E T Y A p r il 1 , 9h9 George H. Gehxmann, M, D. -ae c lic a l D ir e c t o r B. 1 , duPont de Nemours Go. Dulsiin gton 9 8 , Delaware Dear Gehraanni Thank you fo r y ou r prompt r e p ly t o ray l e t t e r o f March 29* I sh ou ld have t o ld you t h a t I had w r it t e n si r a i l a r l y t o Bob Behoe sin c e I r e gar d you an d him a s t h e two b e st p o st e d a u t h o r it ie s on m at t e r s su ch a s t h e one in q u e st io n . P lease be assu r e d t h a t I have no th ough t o f car ryin g t h is l i t t l e in q u ir y beyond th e poin t of try in g t o add t o ray cm 1- st o r e o f kn ow ledge. The q u e st io n s propoun ded b y my w est c o a st v i s i t o r were so beyond my ken t h a t I f e l t j u s t i f i e d i n se e k in g seme en ligh ten m en t. Sin cer ely you rs, \ m b/sd CG Rob er t A. Keh oe , M. Hi 0014743