Document mmxZJyG3eD7qxqj24Bn5q6pek

Tha balk of tha asbectcs of corrarco 3.3 chryo: ^ile. 3'5C.2Si.C2.2*20, which la alnwi lr. the Ihatford recion of the frcr/wr? c: C.iebec. Crocidc- lite and erodto are also csed coee.-jrcisliy' hut ir. sculler amount*. Chr78otil occur? x reins in serpentina, a fair,era! rr'i: 1q ciiarical coa- poaitlcn to chrysotiia tut T.tiich exists in n&ssiva X'arr. and is cade irp of nicrcacopic fibers without tha parallel oricrnts.ticn characJuristic of chryso- tll* Tha aaaeiva blue black eerpeaiir.e which i3 r.ooth -\r.d soapy to tha touch. Is traversed by rain? of fibrous chrysotiio varylas in width frosj a barely perceptible tin* to sir or joore inch. The fiber? run aeroas tha rein end not lencthwis* with tha formation. Attention is directed to tha sdnaral brucite, YrC.F.oO, rrhich is often found in the saaa formations with serpentina ?rd chrysotils nod aay be fibrcua in structure* It has no cccrsatrcial value at present J.^causa its fibers ara not sufficiently flexible to bn usee in textiles hut thsy ara capable of repeated lan^itudir-tl yubdirision. Unlike oth<?r esbostlfora minerals, brucita is not a silicate end for this reason it has boon a valuable '-col in an axpcrircatal evaluation of the action of fibrous cinersic upon 1-^ tissue. 17* sxpsmfgrcAL asbestos is For cany y&sra studies have been carried on by the Saranac laboratory in an tnvfstijixion of tha cszxss, nature and developssnt. of asbtstosii. The present r part is devoted to ExpsriasatAl Ishestos.lSo In it are doscribcd tha active! ex periment# with various kinds of errbeetnn dust, /-rather report, to bs pr-spars'd and if.jjvyftd liter, sill b* ccr.cwmnd th Human Jt^beetonia JJed rill cover ha ha* aspect* of sorters srtv> here b*-*n to asbestos dust in an industrial enviroooent