| Show I PROBE ASKED F FOR OR R SMELTERS OF ZINC By Associated Press Preas JOPLIN Mo Sept 21 At At a meeting of ot representative zinc ore producers of i Missouri Kansas ana and Oklahoma it was agree to petition the federal trade commission com corn mission for for- foran al an investigation of f the zinc smelting companies of the country Mine operators claim that with spelter selling at 9 40 to 9 50 a hundred pounds zinc concentrates should bring more than a ton This was the price paid last week Many mines in this district have been forced to close because of the low prices offered for the ore by smelting com corn panics |