Ask the Experts
April 2014 by Chris RalphBismuth oxide for assaying?
After a short time, the tailings pile can get very large, and can actually block the downstream end of the sluice box.
Science has shown, over the past few centuries, that there is a direct correlation between certain plants and their geophysical surroundings.
The whole purpose of sampling mineralized ground is to measure the values in a small volume of material that would be representative of a much larger volume of similar material. The key word is representative. Chemical and fire assaying will not accurately represent placer deposits by themselves.
Once you get down to the black sands or a few tablespoons of material, the technique changes dramatically.
South African gold miners are turning their anger towards Britain, charging that the sale of 25 tons of gold by the Bank of England has depressed gold prices and put them out of work.
From this I inferred that engine 2 had a carburetor problem. In this article, I discuss the specific engine/carburetor problem, and the surprising solution to this problem.
Silver recovery from low-level solutions is frequently done in a cell that has a cathode with 2 to 5 or more times the surface area as the anode.
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