Document vVGNYm9M02JMmyZnj4MjNkbJY

. I'.CC X? uj ~MOr * j .. .* "" ' American Smelting and Refining Company , ^.v ^- jrcBncygfrvnwwnanKmtww .>...- -v-.,/; - .v r SALT CAKE CITY l. U T A N r'ST'-^ F "Y - V ,-v. .. ' ' ^c- ".'>,*. ::6etofcer 51,--i960 r. ^ ... v 'V; r i-'l -` ', -'4 ':.T^ '--i- -- *. _..*-i **-=' IV ' P, 0. Boa 12? South PUt afield . a'*?*'.'.* Toxicity' - Chrysotile-, ' ^;;:^lead,`arsenic, etc. Sxcept for .the feet that therejs'a congpiete'lack of information,* ; the literature at hand, about the oral toxicity of -cteyeoilU * . asbestos,- I cannot document y -stateaeat that "Asbestos ii 'boi^takio" j.. "' '' Determinations of oral toxicity, ' so. far as l ean deter r .-> L -* been done.' The sole proved effects of asbestos on i r. those of aabestosis, via Inhaling asbestos dusts, and asbest^^iri^Vf^fx^*'--. te'.internally was regarded as unlikely; because!tis`sn'Insbl vv.-o* .magnesium'silicate like talc;; or becausiee' neither'the r:!vccr the-.silleate'ioa is-regarded"as toxlicc. - I have' fcurvi, on* >yfa :: ' ;-' on solubility, a paper by Claric and Hol4t" .oemn.. "WS*ol4uti*oanm...^ ^VwaaAAfl --"t- Asbestos in Water, Acid, aul.Allali^.U,faiture;YolV xS5,^p'."45?^i? *'J' ' ' connection see the paper by Braun and Trusn, "An Epideaiiologlcal Study F of Lung Cancer in Asbestos toners". ' This paper, appeared''lh_ilia :jL]Lk,\i^: '- Archives of Industrial Sealth.of-June, 1950/ and says' ... - -- it seeos fair to conclude that 'the. asbestos .ainera in''the ProvincHs^i-:' of Quebec do not h f. ' than do eoaparable : good bibliography. '1!" 5 v. - _ ' . t v. .ii*-. rl- *-":;:/ <. r ' ^'-\- =-;- "-V*. s* . -t. .r ,* * L* * * a..-. - . * ' '*'' , . *. . -y v.. i** ; '' ^ * -A-.Si'&s.-fidk*-- ''^ b.r.vVLHL~-.il-:',.-.-. jjJ&'Js ASARCO ALL 0000046 ,-sra-v . '." >&- `--"'''S'* To sy knowledge there are no paper ctn 'the asatter c^Sbe^faircSiogeMc^ properties the > Isn't asbestos cement pipe.' approved for`use in .. some research was undertaken by J.-M. to prove that'asbestos vaa safe for such use. "". : '* . ~ If we arua-t furnish proof of non-toxicity and oanjcarcinbgeoctigr kb'Jd-L- (orally), ve are faced with long-time, expensive -experiments which had best be supported by the asbestos industry fs a whole,,vy- ,1 formerly worked with the Division of Pharmacology of Food andDrug A; in Washington. If there is any way ay contacts there might be- i please let me know. -. . .......... ";;- " - > ; KWN/sb cc: Dr. Pinto ,i :: i. .Very truly yours^:'^-.^;';-;;' . * . -h * *; T .' ' .'i-i -- ? *L ** K. W. Nelson . ' *a *- .-11 'l' ' " . '' -- tr * f'i' ,4W *" { ' *............... r ,t.Mr l '. ..'... V . v.v : . F - - . -- "/v, - .>>!- y?-^a- V'vi. '-- , 'f- ^ r .j.. ' rtf . v;..*>.T.'. . - Srf I .* 'v ' ' 4*'"**, * 'i*" *t ^ .* -" \ . :r. > ....... "" - t. :': ;'' , ;- . . * . ,. - .-.v-..,-;V-.... ;. - . - V. - A .--V- - _-<& *V,tC .<V* ..- ' .'.. ti- . -- r.................... * IV. ^ .' ASARCO ALL 0000047 . . -O'