Document ymG1qy8Gj61OMj7j2xV9ZzreD

to iU'co t.ie conclusion:; ;t?ri'-*od i:x nv-?^v--ation at.-. r.ccceaar/, SalXcv c~c.'\ one rith & brim' raau.i;': of ',\\e, evidence. A. ''uriocs fora* of asbestos fiAorc wwjrr c. pcr3rrv.:cr.ielar :iVroc.in c iur.rs o;` tpi; \hh pi<;t, l'cle, cafes c~d ribbifee art n.<fe of idee zsA clogs. Both inhilAtier and injection ernicincuts proride rr.ple support for this tonelesion. Fi:;vrcs arl 6 ;ihoi the reaction fea tm different kir.ce of .nsbesto:; nincrei. S. The rc-ia of -Letion cppscre Vo rvirnril/ mchcniccl rather than chccdcal in nature. Tne eridc.ice is (jivon in fccsicn lUZVi. * FiC'3r`?s -> m ^ b-r-J? illustrate the important points. The fibrous filament d _ structure of asbestos appears to p.lap an essential part in the -irritatin'; action, sir.c* the solid fibres of -Li?? mol co roc produce fibrosis (see i''L-.ure r*). / Slort osbeafeo fiber? do rot croduoc fibrosi3. The oancJ.-rrion. is implied Lr. the ;rrjr.cnne ncnticred in para graph S beers, csperir.e-.ts 'd'.ioh further 3up.:.ort this fir.diry are reported ir. Tablei fl and 2;.. D. ?7pictl fibrosis con be produced br on atoarpheric - uspension of asbestos duct ccntednin? only ai extrenely snail pronc^tion of lens fibers. la the inaulAtion experief.r-t with 100 per ccr.t bill-oilLed asbestos dust a typical, though delayed, fibrosis tnu