A Rudimentary Treatise on the Metallurgy of Copper

allowed alloy amount antimony apertures arsenic arsenic acid assay blue borax bottom brass bronze brought calcining carbon cent charcoal charge chemical Chili clay coarse copper coarse metal coke colour combustion compound consists containing cooling Cornwall crucible crystallises cupola furnace deposits dissolved English method feet fire fluid flux formed fuel fumes furnished fused fusion gives glass globule grains green hammer heaps hearth heat hydrochloric acid impurities inches iron known Lake Superior layer lead malleability Mansfeld mass matt melted metallurgic mineral coal mines mixed mixture nickel nitric acid obtained occurs operation oxide oxide of copper oxidising oxygen placed plate portion powder produced pure pyrites re-agents reducing flame refining reverberatory furnace roasting salt silica silver slag smelter smelting soluble solution specific gravity streak suboxide substances sulphate of copper sulphide sulphuric acid surface Swansea thrown tons tube various vats veins wood zinc