Glossary of Mining Terms - SEC.gov High-grader - One who steals rich ore especially gold from a mine. Hoist - The machine used for raising and lowering the cage or other conveyance in a shaft.
Mining Techniques of the Sierra Nevada and Gold Country To access the gold the ore had to be crushed. The first crushing equipment was the Mexican arrastra a device that ground the ore between two stone slabs
Artisanal and Small-Scale Gold Mining Without Mercury - EPA Nov 21 2018 Seeking to learn about gold mining without mercury? a pipe at the top of the machine in a slurry of around 60-75% water and 40-35% solids.
Mining in the Southern California Deserts - Bureau of Land Photograph of a man operating a hoist at a mine run by Free Gold Mining ing and mining machinery; and visited mining districts across the state The cage and men fell 520 ft. went through a bulkhead of 8-in. square timber A food-storage dugout was found at Hart Swope and Hall 2000:92 94–95 and a cold-stor-.
A History of Mining Machines in Yukon-Charley Rivers National A placer gold miner in California using a compact sluice box called a “rocker” or “cradle” to separate gold from creek gravel 1883. Courtesy of Library of Congress.