Free-milling
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free milling — I. noun : the treatment of gold or silver ore by crushing and amalgamation II. adjective of gold or silver ore : lending itself to free milling : in native form and easily amalgamated or cyanided … Useful english dictionary
Milling cutter — Milling cutters are cutting tools typically used in milling machines or machining centres (and occasionally in other machine tools). They remove material by their movement within the machine (e.g., a ball nose mill) or directly from the cutter s… … Wikipedia
free boring — noun : a milling of the rifling from a section of the bore of a firearm immediately forward of the chamber … Useful english dictionary
Flour-milling — B Stimulated by British preference of, 1843, 32; advantage swept away by free trade measure of 1846, 32; in 1834, 54 … The makers of Canada
Black Hills Gold Rush — The Black Hills Gold Rush took place in Dakota Territory in the United States, and is general considered to have started 1860 70. It reached a peak in 1876.Rumors and poorly documented reports of gold in the Black Hills go back to the early 1800s … Wikipedia
Gold rush — A gold rush is a period of feverish migration of workers into the area of a dramatic discovery of commercial quantities of gold. Eight gold rushes took place throughout the 19th century in Argentina, Australia, Brazil, Canada, Chile, New Zealand … Wikipedia
Death Valley National Park — IUCN Category II (National Park) … Wikipedia
Manhattan, Colorado — Manhattan is a ghost town located in the foothills of the Rocky Mountains in northwestern Larimer County, Colorado, United States. The town was founded in 1886 as a gold mining camp, during the height of the Colorado Silver Boom. The town never… … Wikipedia
Monte Cristo Gold Mine — Coordinates: 34°21′N 118°05′W / 34.35°N 118.08°W / 34.35; 118.08 The Monte Cristo Gold Mine (Spanish for Mountain of Christ Gold Mi … Wikipedia
Treadwell gold mine — The Treadwell gold mine was the largest mine of the Alaskan Panhandle and, in its time, the largest gold mine in the world. During its operation from 1881 to 1922 over 3 million troy ounces of gold were extracted. The mine was owned and operated… … Wikipedia
