The Mineral Industry, Volume 28

alloys aluminium American amount antimony average bituminous blast-furnace bullion Canada capacity cement cent coal Cobalt coke compared concentrates consumption containing copper copper mines cost crucible crude cyanide decrease demand deposits district dredges electric electrolytic estimated exports field figures flotation fluorspar France fuel furnace gold graphite gross tons gypsum important increase industry iron and steel Jour labor Lake leaching lead lignite lode long tons magnesite manganese manufacture matte metal metric tons Mexico miles mill miners molybdenum months nickel operations Ounces output oxide pig iron placer placer mining plant Portland cement pounds precipitation production quantity railroad reduced refined reported reverberatory reverberatory furnace shipments shipped short tons shows silver slag smelter smelting solution South stocks strike sulphide sulphur supply Surv tanks tion tonnage Tonopah tons daily tons valued U. S. Geol United yield zinc