Besides the mines, there are also "_Stream Works_," which afford a large quantity of the purest _oxide_.[109] They occur in vallies, and derive their name from the manner in which they are worked; which merely consists in washing the alluvial soil by directing a stream of water over it, when the finer particles being washed away, the _Tin ore_ is procured in a separate form.[110] The process is termed _Streaming for Tin_. It is a singular fact that the only traces of Gold to be found in Cornwall[111] are in these alluvial depositions, in which it sometimes occurs in small grains, mostly detached, but occasionally adhering to quartz. The miners engaged in the stream works are generally prepared with quills, into which they drop these particles as they find them, and when the quill is full, it is carried to the goldsmith for sale, and considered as a perquisite. But it is time for us to resume our topographical descriptions-- In our road to Redruth we pass _Clowance_ the seat of Sir John St. Aubyn, Baronet. _Pendarves_ the residence of Edward William Wynne Pendarves, Esq. son of the late John Stackhouse, Esq. the elegant author of "_Nereis Britannica_," and _Tehidy Park_, the mansion of Francis Basset, Lord de Dunstanville, &c. About two miles west of Redruth, is DOLCOATH, a copper mine which every intelligent traveller ought to visit, not only on account of the immensity of the concern, and the ability and liberality with which it is conducted, but because it is so situated on the brow of a hill, that the spectator can at one glance see all the principal machinery by which it is worked. It is quite impossible to convey an idea of this singular and interesting scene;--Steam Engines;--Water Wheels;--Horse Whims;--Stamping Mills,--are all in motion before us, while in the glen beneath us many hundred labourers are to be seen busily engaged in the different operations of separating, dressing, and carrying the ore. The same stream of water pouring down the hill turns successively numerous overshot wheels, and serves various other purposes in its course; and, having thus performed upon the surface, all that ingenuity could devise, or the operations of mining require, it is conducted into the bowels of the earth, where, at a hundred and fifty feet beneath its surface, it again turns an overshot wheel of fifty feet in diameter, and becomes again subservient to the skilful exertions of the miner. In the whole circle of human inventions there is nothing which so fully manifests the resources of intellect, for the production of immense effects, as the stupendous art of mining; and it is impossible that the workings of Dolcoath can be viewed without the strongest sensation of wonder and exultation. The works of the mine stretch upwards of a mile in length from east to west; an extent of ground penetrated by innumerable shafts, and honey-combed by subterranean galleries. Upon the summit of the hill is another rich copper mine, _Cook's Kitchen_,