Alluvial gold washing machines were used extensively in Europe during the 19th century for the extraction of gold from alluvial deposits. These machines were essentially large sluice boxes that were used to separate gold from gravel and sand using a combination of gravity and water.
The machines were typically made of wood and were powered by water or steam. They consisted of a series of riffles, which were inclined channels that were designed to trap gold particles as the water and gravel flowed over them. The gravel and sand would be fed into the machine at one end, and the gold would be collected at the other end.
One of the most popular types of alluvial gold washing machines in Europe was the cradle or rocker box. This machine consisted of a wooden box mounted on rockers that would be rocked back and forth by hand. The gravel and sand would be placed in the box, and water would be added to create a slurry. As the box was rocked, the heavier gold particles would settle to the bottom, where they could be collected.
Another popular type of alluvial gold washing machine was the sluice box. This machine consisted of a long, narrow trough that was lined with riffles. The gravel and sand would be fed into the top of the sluice box, and water would be added to create a slurry. As the slurry flowed down the length of the trough, the heavier gold particles would settle to the bottom, where they could be collected.
Alluvial gold washing machines played a significant role in the European gold rush of the 19th century, which saw thousands of prospectors flocking to areas such as California and Australia in search of gold. While these machines have largely been replaced by more modern mining equipment, they remain an important part of European mining history.
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