Document DMnGeq7Mn55GNqMnD6j5M6w44

FILE NAME: Asbestos Mining (ASMI) DATE: 1949 Mar 19 DOC#: ASMI014 DOCUMENT DESCRIPTION: Summary of Saranac Report on Experimental Asbestosis with Cover Memo from Dr. Kenneth Smith ^ fi-flJ L X COSFISEBTZiL Gaorf* S F oster ib M to ii Quo. March 1 9 . 1W 9. rh* m a r t on c p ir tM R ta l u b * * to ili * b - -- rlvwad. Ih* o x p a ri ita m d r --u ltla t eooelujil lT9 gusaarlsad i a th a attach ed re p o rt, to w hich I uwo added wf own e o M B ti and r eo*tio o * . * fee reeownandatloii* it # fo r *"* * * ^ rbslo. e re ra l points need fa rth e r 5 i ^ s 2 2 2 S * ' vbm th e se bawe hewn d iscu ssed w ith th e Soronoe people Z s h a ll subm it an o th er re p o rt. EW8/h.n. t a i i t h V Smith, BD. 4 d PLAINTIFFS EXHIBIT * ' pnmAOT or rutPUBS A. T tr lo w f e n s o f a sb e sto s f ib r e s produce t j p l e a l fibrosis la the lm i> o f o a l ^ s . B. flb ro sle Is produeed bp th e a setn n lesl and net the c t s i c i l ctiaa of the fib re. C. fib ro sis i s produeed bp th e le a f fib re s (20-50 aicroos) end n o t bp the s t e r t fib re s (aid er 20 m eso n s). D. A sbestosis < produeed I n a n a ta o s p h e re w ith a t o t a l d u st count o f 13 . f . f . C . f . o f which only 0.6* were 10 nicrons or looser. f . as th e eo n een tratlo o o f le n s f ib r e s l a the a i r i s i a ereased, the fib ro sis develops la a shorter tin s . . p. fib ro sis w ill n et prosress a fte r renewal fron dnst to nomal air. 0 . A sbestosis bodies a re fbrned around fib re s to prewoxt further Irrita tio n . . E. A lum therapy Is u seless la asb e sto sis. . I . Asbestos d u st causes no s U n lfie a n t ehane la the eourse of pnlnonary tu b ercu lo sis. 1X- STiaSrai *d Sandl r a * e* pti.br iallptyt ibtollitthy. rd*ua.t UQOLC1Lrari hLraSpSlo5praIs*toli* b**B not*d ihr w ny yrar 2. . .i i th tat^ aa of thv duat v u M Ctoalcil ctoralcl * ff* e t, X t o l l K s ? r a p o .* d to hih eoncantrotiooa o f duat. - -w . t h w p f th o etio o only by Ion* fih r* o f 20-50 mieroM i s , 3 * t f i r s t , hard to oeeopt bocott*** (*) X oratooaU y hr* hoord th* " ! SS* K ' -obhlT th* ooat dan**roua l n * t o l u f i j i r a o f o a h M te fis or* tho** o f 5 to 15 * i - L raftT (h) (e) eeeurrd. ,, ^ ,, t o .s js W Saranoe fiadia to c ia i : ik s jr ^ if s s - ^ T .ir is - . n s w y s K s y ^ H !* " S i^ iS 1 6" - * t^1*r * 3 * "* ' b ar* ha o ffliad 1A Km ^ TTY - Saranac dso ha* shown t h a t , lo g ic a lly , as th # eoneaatration of lose fibres is increased, so rt flb re sla develops. fQ* d e a a s lta lit th a Tbatford araa ara o f ion or rip re than the fSbeftos f t o o i i r . "XlttBoib S i r s is no d a ta lo g * 7 , ^ e might I tiu a t th at th a dust la tha Thatford Mill* has a higher porcatage of tha loncar flh ras than th at in * tha Asbestos Mills This 1rtit srm iin t in a rt fo r ihw s r o a ta r nigbar. o f-ss b a s t a j l s c a s ts , saan in th e fffeTxord P la n ts. I T - Tha r e la tiv e ly small noabar o f asb e sto sis oasas oeeurrln In tha asbastoa a la a s and s i l l s as compared w ith tha ta x tlla p la n ts nigh* ba d u e to p art to tha p ercatag s of flb ras la tha Industrial atmosphere. Dost counts in various ta x tlla p lan ts shoo up t o 26% flb r a o h ila counts in our n i l l s shoa only & -5$ fib re . 1. That tha fib ro sis of asbastosls w ill not ft jt w t iI of th a tn ln a l fro o d u st to normal a i r can e a s ily be b eliev ed . I have seen tsaay m oho, when tra n s fe rre d to aoa-dusty jo b s , have lnprovad p h y s ic a lly and whose x-ray s have shown no p ro g ressio n . a Ve alw ars have b elieved th a t th e as be*te a ls bodies are n o t evidence 5` o f S n E e " t e t r tip ly the fa e t th a t fib re has been Inhaled and the tody has shown defensive a c tio n i n an e f f o r t to n e u tr a lis e th a Irritatio n . 6 . X s t i l l believe th a t asbestos dust w ill not aggravate a pre-existing tu b e rc u lo sis; also th a t th e course o f tu b ercu lo sis w ill not be a lte r e d In a man who has worked fo r sev e ra l years I n our n i l l s as long a s ha has no x -ray evidence o f a s b a s to s ls . However, a t the noo a t X can n e ith e r accept nor deny the statement th a t asbastosls has no o ffs e t on superlsposed tuberculosis. The Saranac experlnents have shown th a t asb esto s i s n o t an i * d u st l i k e gypsum, n o r is I t a very a c tiv e d u s t l i k e q u a rts . They have shown th a t concurrent a sb e s to sis and tu b e rc u lo sis produce nore f ib r o s is than does e ith e r d ln a se a lo n e. Also I t has **ea shown th a t tu b e rc le b a c i l l i have been found in th e e sb e sto tlc fib r o s is which i s not the u sual s ita fo r th is in fe c tio n . These experiments hsve shown t h a t th e re nay be sons connection b e tw e a nan-tuberculous infection a d asbestosis. 1 believe ttm t th is Is a fa c t fo r, although X do n et think our m ill workers have nore resp irato ry complaints than the averagem aa, X have Teral eases where pneum ola has developed on a p re -e x istin g S . S S each cases a e x tr - e ly d iff ic u lt to tr e a t, shoe a very aloe recovery and considerable f ib r o s is In th e x -ra y . The lo c a l doc to r s have s ta te d th a t pneumonia in a employee who has worked fo r r .,, T yU r l ia the dust often has a fa ta l term ination. T_ f th e probable detrim ental a ffe c t o f asbestosis on superl- .Id^n2am oula; X boUeve th at the relationship of tuberculosis d 3 o K ! ? v 'e ill- e s ta b lls h o d asbestosis shouldhave f a th e r S S ^ S t h o o g h th is rs la tlo u s h lp has not b o a shown in the r e c a t ex p e r i m a t s , my opinions must be n e u tra l u n t i l more eases o f th e d isease among our employees have been stu d ied . 1* r n i~ niff*--1- -i V .Ut Vrft',, yr t- COPT 1 - n . .1 , S U ' S S 'S pS ^ S i s f f i . - i - * ***" ' n - U b tito il* can bo e c n tro lW , . th* dust eencootrs- (i) trtrj offort aaploy sad 1 tloa in tbs sorkln sr^o^ JJJ rff*ctd boforo 0) tr" `f!!f*- , P^Nblr ss soon SS S r f i 2 " i i - Taboreulosls m id not bo s p r o b l- If* m- i s ' Srsyy s*tlo esso is lso lsto d tad not silo ' ' to'oork; r .ind fa r Do * r o tl7 s rro s to d e sso s; W out. S S S o i . e o o tro l > * o * " 1*4 XT 2 j s s a i * s a f r M g S s ? S ^ ^ issisrssys^SSSk9a s a r * ss- *