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Mining Methods For Alluvial Gold Quart

The lower end of the trough is cut off at an angle of about 45176 and closed by a screen of sheetiron, B, in which a number of halfinch holes are punched, so that the fine dirt is allowed to pass through while the stones are retained.Below the screen is the upper end of the rifflebox, C, which is usually about 9 feet long, 3 feet wide, and at about the same inclination as the upper trough.

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