Document gDbqVwZydbv1432LgVrvnO5KG

January 13 , 1939 Dr* J . A. Sa n fo r d E. I . duP0n t do H on oura an d Co, Baton Hours Lou isia n a Dear D octor San fo"d i I an 3en d in g you h e r e w it h t h e a n a ly t ic a l r c s u it e o b t a in e d on th e l a s t s e r ie s o f r e g u la r ncir-piec s u p p lie d t o u s some t im e a go . In accordance 1th ny u su a l custom , I h ave u n d erscored a l l th ose r e s u lt s w h ich a r e s i g n i f i c a n t l y h igh .- 1. am g la d t o s a y t h a t t h e r e a r e o n ly two su ch r e s u lt s among th e u r in e sa m p les. There is som eth in g r a t h e r s ig n ific a n t a b o u t t h e f a c t , ho-m over, t h a t ^ | 0 P a n d h ave shown h igh va lu e s on b o th o cca s io n s . Uhen we come t o t h e r e s u l t s on th e fe c e s , th e r e a r e q u it e a number o f h igh r e s u lt s w h ich in t h e m s e lve s would' n o t b e s i g n i f i c a n t n e c e s s a r i ly e xce p t fo r t h e fa c t t h a t in t h e m ain co r r e s p o n d in g ly h igh r e s u lt s o ccu r r e d in th e same in d iv id u a ls in th e secon d q u a r te r . 'Sm s th e r e a r e tw elve h igh r e s u lt s t h a t o ccu r among th e same in d iv id u a ls d u r in g t h e s e two q u a r t e r s . I t was s u g g e s t e d t h a t t h e h ig h r e s u lt s o b t a in e d d u r in g th e p r eviou s q u a r te r m igh t be due in p a r t to th e co n ta m in a tio n o f sam ple c o n t a in e r s wh ich h ad b een k e p t in s t o r a ge a t th e p la n t for^ u n d itly lo n g p e r io d , i/ ith th e r e s u lts a va ila b le fo r the presen t, q u a rter, i t is q u ite ap p aren t th a t th a t exp la n a tion is n ot ten a b le a n d t h a t we a r e d e a lin g h e r e w it h le a d e xp o s u r e s w h ich a r e e it h e r the r e s u lt o f u n u su a lly h igh lea d con ten t o f fo o d or a r c a s s o cia t e d w ith a co n s id e r a b le d egr ee o f exposure in th e p la n t. ' Th is co n d it io n i s b y no moans a la r m in g b u t r e q u i r e s r a t h e r c a r e f u l e xa m in a t io n '.in t o t h e f a c t s w it h r e s p e c t t o t h e e xp o s u r e o f t h e men i n vo lved . Very t r u ly yo u r s , -- 4.- w w R o b er t A. H olioc, .D .n f i 'i