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The History of a Lump of Gold

The History of a Lump of Gold


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About the Book

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1885. Excerpt: ... schlich accumulates, and gradually penetrates into a space between its external surface and the bottom or interior surface of the iron basin; from this it flows to the next mill by a spout. In the bottom of the fixed vessel about half a hundredweight of mercury is placed, which lies to the depth of about half an inch, and when the machine is in motion, the pounded mineral is constantly agitated and mixed with the liquid metal. The minute particles of gold are there seized by the mercury, and become dissolved by it, while those which escape amalgamation in the first mill are retained by the second, third, and so on through the series. The mills are worked in this way for several weeks, or until the mercury becomes sufficiently charged with gold, when they are stopped, and the amalgam removed and strained through chamois leather to separate the excess of mercury from the amalgam, which usually contains about onethird its weight of pure gold. The mercury is afterwards recovered by distillation in an iron retort, the beak of which dips into water. About twenty shillings' worth of gold are obtained from each 150 lb. of mineral.--Muspratt. In extracting gold by amalgamation, various forms of apparatus are employed, but the principle of the process will doubtless be sufficiently understood by the examples we have given. We may, however, state that during the great gold mania in 1853, Mr. Burdon, of New York, contrived a very useful machine--well known as Burdon's gold ore pulverizor and amalgamator--which proved very effective at a time when it was really needed. The gold which is obtained by the process of amalgamation generally contains silver, copper, and other metals in varying proportion, according to the source from which it is derived. When we bear in min...


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Product Details
  • ISBN-13: 9780217950374
  • Publisher: General Books
  • Publisher Imprint: General Books
  • Height: 246 mm
  • No of Pages: 28
  • Spine Width: 2 mm
  • Width: 189 mm
  • ISBN-10: 021795037X
  • Publisher Date: 06 Feb 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 68 gr


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