Encyclopaedia Britannica, 11th Edition, Slice 7 Volume 2

Encyclopaedia Britannica, 11th Edition, Slice 7 Volume 2

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Excerpt: ...containing the gold or silver is cupelled and the resulting gold or silver button is weighed. The first is conducted in one of two ways, known respectively as the crucible method and the scorification method. The crucible method is generally used for ores containing gold in small amounts and for certain classes of silver ores. The amount of ore taken for assay is generally one-halfshow more

Product details

  • Paperback | 208 pages
  • 189 x 246 x 11mm | 381g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236735366
  • 9781236735362