Document oR3q3eLKjo1BgXGw6b6wR1YR

c. c > used commercially but In v.iuh nailer amount!. Chryaotllo ocours as veins la sorpentlae, a mineral of almilar chemloal composition^tloh oxlate la massive form end le made up of microocopio flbore without tho parallel orientation eheractorlatlo of chryaotllo. The maeaivo bludsh* % black serpent inn, srhloh le smooth sad soapy to the touch, le traversed by volns of fibrous chryaotllo varying in width from e beroly pereoptlble lino to elx of Mrs Inchoa. The fibers run aoroas the vein and not length* wine with the formation* Attention La directed to the mineral brucito, lfgO.HgO, which le often \ ** found in tho onuo format!one with eorpontlne and chryeotlle ^nd may be fibrous in structure* Except for the manufeoture of megneelum, bruclte hne no commercial valuo at proaent because its fibers are not sufficiently flexible to be used in toxtllos, but they are capable of repoated longi* tuoinol subdivision. Unlike othor aibestiform minerals, bruclte is not a sllLeato end for this reason It has been, a valuable tool In an experimental evaluation of "the aotlon of fibrous minerals upon lung tissue. EXPEHIUEHTAL ASBSSTOSZS For many ynere atudies^#^^ have boon oarrlod on at the Saranac Lab* oratory in so investigation of the caused nature and development of asbes* tools. The present peper.te devoted.to experimental abootoalc and In It lGardner, l.if. and Cummings, D.K.i Studies on Experimental Pneumoconiosis. VI. Inhalation of Asbestos Oust* J, Induet* Uyg* 13t 65, 07, 1931* 2. Gardner, L.U.t Chryeotlle Asbestos as an Indicator of Subtile Dif ferences In Animal tissues* Am* Rev. Tubero* 46t 7C2, 1942* i T