Document 0qbav7aL3kNR2O2vYX3KvLr5d

October 28,1936 Dr * P . W* P o r r o , D ir e c t o r S t , Law ren ce Coun ty La b o r at o r y A. Bar t o n Hepburn H o sp it a l O gd en sbu r g, Hew York Dear Dr* P orroj P le a so a c c e p t my t h an k s f o r you r l e t t e r o f O ct ob er 17t h . I s h a l l sen d a copy o f ou r r e s u l t s t o Mr* Maxwell o f t h e St an d ar d O il Company o f Hew Yo r k , , an d I d ar e sa y h e w i l l make r e p o r t t o th e Com m ission * However, I h ave no o b je c t io n t o you r se n d in g th e r e s u l t s t o t h en a t an y t in e you may w ish t o do so * I th in k you ar e probably r igh t in poin tin g out th at cer tain v ar iat io n s in the r e su lt s in th e san e t i ssu e s n ay be due to s l i g h t v a r ia t io n s in th e m eth od* A c t u a lly we h ave fou n d t h a t t h e D it h izo n e method a s we a r e now h an d lin g i t , t en d s t o g iv e r e s u l t s somewhat h i flie r than th ose ob tain ed by th e Sp ectrogr ap h ic method. Th is is th e r e su lt of ce r tain im perfection s in the pro cedure a t presen t due la r ge ly to th e siz e of the b lan k . We h ave no r e aso n t o b e lie v e t h a t t h e se im p e r fe c t io n s may not be elim in ated , and in fa c t th ey have been in d ealin g w ith c e r t a in ty p es o f sam p les* However, where one i s d e a lin g w it h m a t e r i a l s wh ich may h ave been con t am in at ed , i t i s q u ite p o ssib le to obtain uneven r e su lt s sin ce the contam inant i 3 r a r e ly even ly d ist r ib u t e d th rough th e m aterial* I am su r e t h a t i f we co u ld b e o f any se r v ic e to you in makin g an o c c a sio n a l a n a ly sis of e it h e r t i s s u e s o r e x c r e t a , we sh o u ld b e h appy t o do so * O b v io u sly we do n o t make i t a p o in t t o c a r r y on an y c o n sid e r a b le burden o f r o u t in e work o f a d ia g n o st ic ch ar acter , but con sid erin g the d iffic u lt ie s of lead a n a l y se s, we a r e q u it e w i lli n g t o do them from tim e t o tim e u n der su i t a b l e c o n d it io n s* The g r e a t e st d i f f i c u l t y in th ese c a se s, h ow ever, is to ob tain m at e r ials th at have feeen so h an d led a s t o c e r t a i n l y av o id s l i g h t co n t am in at io n * C o r d ially you rs. RAKjis KZ 0 0 21&48 R o b e r t A* Keh oe, w.D.