Document JN2Gnew9QaYLL94jQVjVEzYg2

Ju ly 29, 1933 Mr. S , J . Uu3S3y P r a t t and ..h it n ay M r or a i t Ea3t r- a r t fo r d , Conn. Dear Mr. Du ssey: "'o have a n aly se d th e scrapie o f d u st at t ac h e d t o y o u r lo t v o r o f Ju ly 23t h . Vfe o n ly r an a q u a l i t a t i v e t o s t and t h i s showed a v e r y la r g e amount o f le a d p r e se n t . In o u r o p in io n t h e r e w ould be a c o n sid e r " ab le h ealth h azard w ith t h is spark p lu g clean in g op er ation i f the o p e r a t o r w as c o n t in u a lly an gaged in i t and i f st r o n g su c t io n v e n t i la t io n was n et em ployed. I f pow erful su ct io n v e n t ila t io n i s employed w ith an a i r stream , o f s u f f i c i e n t v e lo c it y t o Im m ed iat ely remove an y d u st a s i t i s formed t h e r e would seem t o bo no h azar d in v o lv e d p r o v id e d t h e d u st y a i r i s `su it a b ly d isp o se d o f . The d u st y a i r , i n our o p in io n , sh ou ld be d i s ch ar ged w e ll above groun d l e v e l so t h a t t h e lo ad d u st w i l l be r a p id ly d isp ersed . Any h e a lt h h azar d from t h e le a d d e p o sit s o c c u r r in g in an en gin e i s alm o st e n t i r e l y due t o in h a la t io n o f d u st . I f an y d u st formed i s r a p id ly removed by v e n t ila t io n o r a l t e r n a t i v e l y , i f d e p o sit s ar e w et t ed w ith o i l b e fo r e rem oval a l l h azar d sh ou ld be p r a c t i c a l l y e lim in a t e d . Tie w ould be in t e r e st e d t o know w h eth er t h e v e n t i la t io n sy st em you h ave in st a lle d com plies w ith th e above su gge st io n s. Vie a r e for w ar d in g a copy o f y o u r l e t t e r and ou r r e p ly t o o u r m ed ical co n su lt an t s and sh a l l a lso p a ss them an y fu r t h e r in for m at ion you have t o o ffe r , , Yours ver y t r u l y , // SDK:EEL CCj Dr. W .F. Maohle S.D . Heron Ktr 0009093