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Paymaster Stamp Mill, relocated to Jake Jackson Museum, Weaverville, California; Kentucky Mine Stamp Mill and museum, near Sierra City, California; 30 stamp mill near Cordova, Ontario; Mining History Illustrations 5 cutaway drawings of mills produced by the Joshua Hendy Iron Works Company during the early 1900s. Western Museum of Mining and ...
Exhibits include the crystalline gold Fricot Nugget, weighing 201 troy ounces (6.25 kg), the largest found during the California Gold Rush; a working scale model of a stamp mill over 100 years old, demonstrating the process of extracting gold from quartz rock; and a replica hard rock mine tunnel that allows visitors to better understand California's hard rock mines.
The Davis Mill is a historic stamp mill located off of North Bloomfield Road northeast of Nevada City, California. The mill served the Randolph Mine, a small gold mine run by the Davis family, from 1915 to 1940. It included the standard machinery of an early 20th century stamp mill, which consisted of a stamp battery, a rock crusher, an ore bin ...
Second, the construction of the water pipeline was a phenomenal engineering feat; its scar can still be seen between its origin near Telescope Peak and the mill site. The fifteen-stamp amalgamation and cyanide mill built by the Skidoo Mines Company is a rare surviving example of an early 20th-century gravity-feed system for separating gold from ...
By the middle of the twentieth century, hundreds of stamp clubs had formed throughout the United States, often affiliated with large organizations, such as the American Philatelic Society or the American Topical Association. Many published their own scholarly articles or journals, while others advertised in the journals of larger philatelic ...
After Joshua Hendy died in 1891, management of the company was taken over by his nephews Samuel and John. After the April 18, 1906 earthquake a fire devastated the original San Francisco factory, and the company was re-established in Sunnyvale, California after the local government enticed the company with free land.
The rock was crushed in a four-stamp mill with 600-pound stamps, and a 5-foot (1.5 m) Huntington mill. Two of the above-mentioned mines were free milling and two produced sulfide ore. Five men were engaged on the property at the time, mainly on development work. The owner in 1895 was R.E. Hudson.
The stamp mill contained 40 1,250 pounds (570 kg) stamps. Ore entering the mill from the tramway went over grizzlies. It then went to stamps which dropped 106 times per minute. Only outside amalgamation was used, and the pulp flowed over 6 feet (1.8 m) amalgamating plates to Frenier sand pumps, which sent it to hydraulic classifiers.