Show A bill of interest to the zinc producers ot of the west has passed the house the bill provides for a protective tariff on zinc im ported to this country and if passed by the senate will have the eff effect act of finding a ready market for the product of numerous large properties now forced to store their zine zinc I 1 0 the used during the war to detect tunneling operations of the enemy forces underground will come into use in practical mining operations this delicate instrument can detect sounds at a distance of t 1500 feet through solid ground and 1200 teet feet in coal it will be used for the purpose of catching the tapping of entombed miners diners and noting the distance of drilling operations from a tunnel |