those at the western extremity. The stream issues from an aperture in the side of the mine, (being the termination of the subterranean conduit,) and flows along a wooden gutter, in a westerly direction; the body of water being only one foot wide, and half a foot deep. This turns the first wheel, which like all the rest, is fourteen feet in diameter, and two feet in width; and is constructed with troughs, called Buckets, to receive the water, which falls into them from a shoot, to which the stream is conducted, at the top of the wheel and the buckets retain the water, during their descent, till they nearly reach the ground. The power of this wheel is great; for, there are forty buckets attached to it, each holding two gallons; and nearly half the buckets being full at a time: an admirable mode of giving great power to a feeble stream! I do not mention this as new; for it is old: I praise it as a skilful invention. As the water falls from the buckets, it enters a cesspool, without any material diminution :

and is conducted, twenty or thirty yards, in a westerly direction, to the top of the second wheel, which it acts upon, in the same manner as it acts upon the first; and so it continues to flow westerly, and act on the third and fourth wheels. I have already stated that these three inner wheels. are each sixteen feet lower than the wheel adjoining them, eastwards; so that the top of the wheel, to which the stream is conducted, is two feet lower than the bottom of the easterly adjoining wheel, from whence the water flows: thereby giving the water a fall of two feet, in its passage from one wheel to another.

These eight mills are applied to the stamping of tin; each wheel turning an ex, with four keps; with the exception of one, which turns an ex with only three keps; these keps rising against the lifters, raise the stampers, one after another, seriatim. The action of the barrel of a handorgan, on the valves of its pipes, affords a good illustration of this machinery: for a

description of which, and of the action of the stampers, and of the water on the ore, and the whole process, till the pulverized ore reaches the stamp pits, the reader is requested to refer to Wheal Vor, under the head of Stamping Mills.

The lavatory processes are effected in the Buddle, the Wreck and the Keeve: of which, in their order.—

The Buddle, is the utensil in which the pulverized ore is first washed. A minor stream of water is conducted along a Condur, (or arriss gutter,) from that which supplies the wheels, and it forms a little reservoir or cesspool, called the Buddle Pool. The water flows from hence over an inclined plane, called the Buddle Head; at the lower end of which is a dam; and over this dam, flows the current, which is regulated so as to be about one sixteenth of an inch deep, and passes over another inclined plane, two feet and a half wide, and half a yard long, with a fall of three inches. On this inclined plane, is laid a shovel-full

of the pulverized ore, (which has been previously taken up from the Stamp Pit, and left to drain;) the ore is then divided into ten streaks, (or ridges,) between which the water flows, washing the sides of each. The tin, by reason of its gravitation, remains; notwithstanding this current of water passing between its rows, and coming in contact with it, as the workman spreads it out, and again divides it as before; but the water carries baser, (because lighter) matter off. There is a third inclined plane to the buddle, seven feet long; which is half a yard lower than that I have last described; and upon this, any ore, which escapes in washing, lodges.

After many repeated washings in the Buddle, the ore is laid on the Wreck, another inclined plane, about seven feet long and five wide; over this it is thinly spread, and is agitated with a feather, fixed at the end of a light wand; water flowing over it, as before.

The ore is next put into the Keeve,

which is a large wooden vessel in the shape of a half-hogshead; and is two feet and a half wide and high. This being half-filled with water, one man drops, from his shovel, the pulverized ore, whilst another stirs the water round, till the vessel is filled; which occupies ten minutes: the side of the Keeve is then gently knocked with an iron bar, for ten minutes; the effect of which process is, that the tin, being most weighty, goes to the bottom, -the mundick lies on the tin, and the waste is at the top of all. The waste is removed; and the Keeve being emptied, and replenished with clean water, the ore is put into a brazen sieve, and immersed into the water, and sifted under its surface. Mundick is a semimetallic compound, in which tin is found, when in lodes ; and being heavier than the stone, and other minerals or waste which are pulverized with the tin, abides with the tin through all its washings: the lighter waste being carried off. Tin at Carclaze, is in the proportion of twenty per cent. of the pow