Document JNJ7ZrQk7d11p19gD2R5gNQz2

s INTRODUCTION Asboetooiu is a form of pneumoconiosis.resulting frots prolonged inhalation of asbestos duot. Tho name asboatoo, literally ''unburnable," Ic not that of a opooific mineral but la a torn oppliod to a number of different minorals whoso oharactoriotio featuro ia a structure composed of long, parallel, flexible fibers. This structure is unique beoauae tho fibers aro capablo of ropoatod longitudinal subdivision to units of molecular propoi-tiorifl. In length the fibers vary from a few microns to sit or moro inches. Some varieties aro otiffer than others but many aro sufficiently flexible to be upun into yarn and wovon on modified textile machinery. .. Tho aobeotoo mincrols are uilioatos of verlablo composition and be long to the serpentine and tho amphibolo groups. Llstod bolow are the moro ooasaan varieties. Amphibolo Group Aotinolito Anthophyllito AinoGito Crocidolite . Amphibolo. .Tremolito ' Scrocntlno Group Chryootlle -- ^ -The built of tho asboatoa of comaorce is ohryaotile, 3Hg02r>i022U20* whioh is mlnod on this contlnont principally in the Thotford region of tho Provinoe of Quobeo and In Vermont. Crooidollte and anasite also aro \ 1- -