The Silken East La-
close of each day the gravel is drawn ; but all day long the water that has poured through them has borne away the yellow clay, not unmixed with a small percentage of rubies. This clay is distributed outside the works, and as it heaps up it makes a cone like that of a mud volcano, furrowed and built up, and furrowed again, by the water hastening on its way.
The motive power is electricity, and its action is communicated in the ordinary way by means of innumerable wheels and endless leather bands. The whole purpose of the machinery, which has been adapted from that in use at the diamond mines at Kimberley, is first