metal, silver, separation of the ore from the lead, wood engraving, out of: "Brockhaus Konversations-Lexikon", 14th edition, Leipzig, 1891 - 1895, Additional-Rights-Clearences-Not Available

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Keywords: 19th, benefication, century, cleansing, deep, dressing, engraving, extraction, extractive, graphic, graphics, historic, historical, industries, industry, lead, metal, metallurgy, metals, mining, open-cut, open-pit, opencast, ore, people, precious, preparation, processing, separate, separating, separation, seperation, silver, underground, winning, wood