Show the upper mississippi valley region including adjacent parts of wisconsin illinois and iowa estimated from the wieldy reports of J E kennedy suffered a considerable sid erable decrease in lead and zinc ore production in 1913 the lead content of 1913 ls is esti est lead concentrates produced in of tons mated at 2411 tons a decrease or about 28 per cent while the recoverable in that aba zinc content of zinc ores produced compared tons as year was about to tons in 1912 a loss of over 20 per cent wisconsin thus drops to fifth place in Montan AlOn tana 3 zinc production being passed by to the shipments of zinc concentrates while wbk tons smelters shelters sm elters approximated lit a was the quantity of lead concentrates tle tie less than tons |