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Knight's Mechanical Encyclopedia (ed. Knight), M. (search)
roduct is but a small proportion of the amount obtained by a careful analysis. It is understood that in Europe the ores are heated upon open arches and the vapors condensed within brick chambers. For detailed description of the process and apparatus, we must refer the reader to Ure's Dictionary and chemical treatises, as the subject is not so clearly within the scope of this work that it can be treated at any length. The extensive quicksilver mine of New Almaden is twelve miles from San Jose in California, and has had the benefit of energy, skill, and capital in its development. A good description of the place and the works was written in 1857, and given in Harper's Magazine, June, 1863. Changes may have since taken place. The mode of mining and breaking into pieces suitable for the furnace has nothing peculiar to offer, but the condensing-furnaces are worthy of notice. They are sixteen in number, arranged side by side, and extend a distance of several hundred feet beneath