Document xjMD701zB1mZD0wb1a0ENpQ4J

Dr* Norman Roberts, Quarantine Station, Staton Island, N. Y. My dear Doctor Roberts:- I h ave yours o f November 1 3 th , w ith e n c lo s u r e . I th in k you h a v e g o t t e n th e s i t u a t i o n rem ark ab ly w e l l , and I have no comments or c o r r e c t io n s to make. However, s in c e t a lk in g w ith you, we have b een m aking some rough c a l c u l a t i o n s , and fin d th a t in the v eh icu la r tu n n el w ith th e v e n tila tio n as proposed by F ie ld n er , which is con sid ered a b so lu te ly e s s e n t ia l to avoid the dangers o f carbon m o n o x id e, a man w i l l ta k e in t o M s lu n g s a p p r o x im a te ly l / Z milogram o f lead in the fou r hours th a t F ield n er c a lc u la t e s as a maximum l e n g t h o f t i n e h e sh ou ld spend in t h e t u n n e l. How much o f tx t h is 1 /2 m ilogram w i l l be absorbed i s , o f c o u r s e , an im p o ssib le q u e s tio n to answer at the p r e se n t tim e, but i t d o e s not seem l i k e a v e r y l a r g e amount a t the m o st. p e o p le m ust b e g e t t i n g t h i s much lea d r e g u la r ly a lr e a d y in a g r e a t many o th e r l i n e s o f work. I s in c e r e ly w ish that you m ight be d e ta ile d on t h is prob lem , a s I an su re th a t we could work to g e th e r w it h m utual s a t i s f a c tion . A lw ays w ith th e k in d e s t p e r s o n a l r e g a r d s , I am Very tr u ly yours, (SIGNED) BiOMAS 11IDGLEY, J R ., C hief E ngineer, Fuel S ection . TM -Jr.- D KJDR