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4i© TALC GENUS. . , Gives a Aiming ftreak. Very foft, palling into friable. Mild. - - - 2 5 Adheros fcarce perceptibly to the tongue. Feels greafy. Not particularly heavy. Sometimes it is coloured and mixed with iroa ochre, but this is to be confidered as accidental. ■ J.3 i I > V , .. !■ . ‘ V* ” Chemical Cbaraderl™"-' , ‘ ! ■ * ^ 0l l.VV — ■>-!■ ,2- ^ jt*- liT It melts into a brown fpungy fcoria; it falls to pieces in water without forming a pafte with it, or without foaming like foap, as is alTerted by fome authors. ' • ~ nr-. ■ } I ' Constituent Parts. t ... ■ Sl . .• . Hamplhire fullers earth affords Silica j, } 8 (■j'.'t ’ 'iin Alumina., 45,0 •, • Lime 22 “ r; # r- 3*3 \ t ^ V" : - : Magnefia , * 0,7 • , ' t l - . L I.J * . Iron 0,7 X f^ r . *5,5 Bergman. Opufcul. t. 4. p. 156. ^ • 1 ,4 '■ iD • ■ . ’ Gcognojtic ’• f
