Document 70mgrkyyxopV85O13XK414ndR

f X I H A R O LD R. B O H LM A N . M .D . '2h4-17 MEDICAL ARTS BUILDING CATHEDRAL STREET AT- READ Ba l t imo r e , Ma r y l a n d February T w entv-fifth 19 ? 3 Dr, R, A, Kehoe: U n iv ersity o f C incinnati C in c in n a ti, Ohio Bear D octor Kehoe: . T nr. t a k in g t h e M h e r ty o f w r i t i n g you a t t h e s u g g e s t io n o f Dr, Graham Edgar, D irector o f Research fo r the Ethyl G asoline C o ro o n tien , Dr, Edgar t e l l s ne th a t yon.are doing work on the p h y s io lo g ic a l.e ffe c t o f e x h a u s t g a s from g a s o li n e c o n t a in in g t e t r a e t h y l lo a d , - I am p a r t io u la r lv in te r e ste d in t h is , as I have occa sio n to f ly Hornet powered a ir p la n e s w ith s h o r t e x h a u s t s t a c k s , I have n o te d c e r t a i n s-',rmp:toms% r,'pt e r lo n g f l i g h t s , sut-'^esting t o o much o a rb o n m cn cx ile i n h a l a t i o n , o r ^ o s s ih l^ the e ffe c ts o f lead . Dr,. Graham h a s v e r y k in d l y forw arded -t o ms t h e b u l l e t i n o f t h e TJ. S , Bureau o f Mines n u b lish ed in 192?, and a ls o th e r e p o r t o f t h e B r it is h M in istry o f H ealth dated 1930 I s h a ll be g r e a tly in d eb ted to you i f you ,can pass on to me a n v in fo r m a tio n w h ich you may have g a th e r e d s i n c e t h e s e d a t e s , p a r t i c u l a r l y w ith r e fe r e n c e t o th e amount o f le a d w hich can and may be absorbed by th e a lv eo la r surfaces in fly in g th e above m otors, I am, r e f e r r i n g t o D ou glas A ir p la n e s o f t h e o b s e r v a t io n t y p e , pow ered w it h H ornet m otors. T his amount o f lead would appear to be c o n sid e r a b le , s in c e on r a th e r damp days,* a f t e r f l y i n g f o r t h r e e o r f o u r h o u r s , I h a v e n o te d a d istin c t gray d ep osit a ll g la ss fa ce s o f the instrum ents, s u ffic ie n t so t h a t I cou ld e a s il y tr a c e f in g e r marks in th e d e p o s it. T h is i s e s p e c ia lly n o tic e a b le i f one turns th e plane so th a t th e sun s tr ik e s on th e instrum ents over one's shoulder, : With many t h a n k s , am . ' V ery t r u l v v o u r 's . HRB:JC X. 00201H