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In 1878, mrs. frank leslie toured the comstock with the team from her husbands illustrated newspaper. this lithograph shows her peering into a milling process that turned ore into bullion.
Arrastras, employing an older spanish form of breaking down ore, are shown in this lithograph in the foreground. modern, more costly mills of the nineteenth century appear in the background.
The mexican mill of the comstock lode was typical of the architecture use for buildings that processed ore. millers used gravity to draw gold-and-silver-bearing rocks from stamping at the top down into the various steps that eventually yielded bullion.
Stamp mills, often running twenty-four hours a day, roared as their pistons rose and fell, hammering ore into dust. hundreds of these worked during the height of the comstock mining in the 1860s and 70s.
A lithograph shows how complex comstock mills became as the science of removing gold and silver from ore was perfected in the nineteenth century.
One of the greatest challenges the mining industry faces is the extraction of resources from ore, the material that encases valuable minerals. this task follows the better known first phase of mining, the retrieval of ore from the surface or underground. during the nineteenth century, nevada industrialists revolutionized the milling of gold and silver ore.
Nineteenth-century millers used various techniques. most employed mercury, a metal that readily bonds with gold and silver to form what is known as an amalgam. this compoundmdashonce a standard for dental workmdashcould be heated to boil off the mercury, leaving the precious metal behind. placer miners, who arrived in the west with the 1849 california gold rush, often used this approach after washing loose soil containing diffused microscopic gold.
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During the nineteenth century, nevada industrialists revolutionized the milling of gold and silver ore. nineteenth-century millers used various techniques. most employed mercury, a metal that readily bonds with gold and silver to form what is known as an amalgam. this compoundonce a standard for dental workcould be heated to boil off the ...
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