Smelt′er's fume.
（Metallurgy.) The metallic fume resulting from the smelting of lead, the sublimation of zinc from ore, mercury from cinnabar, etc. The fumes of some lead-smelting furnaces are 3 feet in width, 6 feet in hight, and are sometimes several thousand yards in length. The gallery of the Allen lead-mill Northumberland, England, has a length of 8,789 yards (nearly 5 miles), a hight of 8 feet, and a width of 6. The lead thus collected in Mr. Beaumont's mines, in the district mentioned, amounts to $50,000 annually. Quicksilver furnaces are elaborate examples of this form of condenser. See mercury; Aludel. Blende or black-jack is sublimed, and the fumes filtered through bags. See zinc. The fumes of the copper-smelting furnace are led to great distances to avoid injury to animal and vegetable life in the vicinity. Sulphur and arsenic fumes are an incident to many metallurgical operations. Condensers, of much smaller proportions, in which the assistance of water is invoked, are in common use. See condenser. The arsenic and lampblack chambers are merely large buildings, with one or more apartments, in which the fumes cool and deposit.
