Show fill mines with sand the of man mail minerv in an fur 01 bopf an aal I 1 australia till fill the abandoned sand so that tile the mirits ma become ancis morp corp a pirt of the solid cruet of the alie earth 01 j worked out coit mines are often a menace to build ings or above aboia th ahnin iii aud and protection b tin chich alch 1 the american method affords sect irit for no great length of tinie time sand filling liis his bf ben n practical pl in the mines of us ralla for the last four teen ae irs 11 II arising in the and mining lour jour n nil 0 ay ays that the cost in us ii 19 about 20 cents for each ton toll of ore ex ei |