Rocker box
A rocker box (also known as a cradle or a big box) is a gold mining implement for separating alluvial placer gold from sand and gravel which was used in placer mining in the 19th century. It consists of a high-sided box, which is open on one end and on top, [1] and was placed on rockers. Gold prospector pouring water through his rocker box, Pinos …
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