r to a grindingpan.
The ore and water enter the eye of the runner, and pass between it and the bed-plate to the periphery, at which they are discharged by a spout to a series of amalgamating-boxes, each of which consists of a case R containing a series of copper pans placed in vertical series.
The upper muller L has a rotary motion, and the lower one an oscillation, derived from the crank and pitman O. The shell M, whose floor forms the lower muller, travels on rollers as it oscillates.
Brock, May 1, 1860.
The upper surface of the revolving disk e is divided into a number of receptacles, and the lower surface of the disk above it is ribbed.
The respective disks revolve in different directions.
The receptacles are filled with mercury, and the action of the upper plate o is to feed the pulverized ore from the center continually towards the periphery, its gravity keeping it as a film in contact with the mercury upon which it floats and travels.
The disks are rotated by the enga