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Show AsIkiIiu tllnlnr. HH In Canada aro a number of mines Wm whero asbestos Is produced, and ono bfflf of the largest of thete It near Shor- mm. brooke. In Ontario. The serpentine MM rock Is mined In open quarries, and WM after It has been carried lo the surface, Kfif that bearing the asbestos Is separated sHy from tho barren material by hand- VB picking. At a cobbing house the long- ?B nberel atbestos Is knocke-1 off fron tbe serpentine by hand If the veins (kR2 are more than three-quarters of an Mti Inch thick, but In the smaller piece SftU this separation It made by machlnory. KM |