An Arrastra (or Arastra) is a primitive mill for grinding and pulverizing (typically) gold or silver ore.The simplest form of the arrastra is two or more flat-bottomed drag stones placed in a circular pit paved with flat stones, and connected to a center post by a long arm.
An Easier Way to Crush Rocks! Once primarily used by landscapers and contractors to crush rock for demolition, gold miners are now using them to both test material in the field, and recover gold back at home.
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North Eastern Railway Memorial, York Teachers who Fell in 1914-18 Teachers who Served in 1914-18 Teachers who won Military Honours during 1914-18
Porphyry Deposits Every investor in the mining industry has heard about porphyry deposits, yet few understand the significance of the term. Porphyry deposits are often enormous in size, representing the most important source of copper and one of the leading sources of gold.
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The History of Ballarat, from the First Pastoral Settlement to the Present Time by William Bramwell Withers.
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A stamp mill (or stamp battery or stamping mill) is a type of mill machine that crushes material by pounding rather than grinding, either for further processing or for extraction of metallic ores.
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What is pie? Pie is what happens when pastry meets filling. Pie can be closed, open, small, large, savory or sweet. The basic concept of pies and tarts has changed little throughout the ages.
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Early Gold Mining Methods . Miners during the early Gold Rush years wanted only one thing: gold. They didn't care about elegance, craft or aesthetics.