. Appleton's dictionary of machines, mechanics, engine-work, and engineering. In Fig. 2S15 is such a machine represented as it is in operation at Goldhill. It is a cast-iron circulartrough of about 16 feet diameter, 10 inches wide, and 6 inches deep; the trough is firmly fixed uponthe floor of the mill In this trough five travellers or head-stones are moving, of 3 feet diameter and6 inches thick, rounded on the edge, made of cast-iron. These travellers are fixed to the revolving-shaftin the centre, and are moved by it. The circular trough is supplied with coarsely broken ore and a con-stant cu
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. In Fig. 2S15 is such a machine represented as it is in operation at Goldhill. It is a cast-iron circulartrough of about 16 feet diameter, 10 inches wide, and 6 inches deep; the trough is firmly fixed uponthe floor of the mill In this trough five travellers or head-stones are moving, of 3 feet diameter and6 inches thick, rounded on the edge, made of cast-iron. These travellers are fixed to the revolving-shaftin the centre, and are moved by it. The circular trough is supplied with coarsely broken ore and a con-stant current of water, which latter washes off all the light impurities, and leaves the gold in the the close of every days work the trough is supplied with some quicksilver, which is worked in it fori or •§? hours time, in which time it absorbs the gold, and is then removed as amalgam. The waterfrom these mills is generally conducted into other machines, in which some of the fine gold which passesfrom the first machine is gathered. In most cases a shallow round ba
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
