Page:Transactions of the Geological Society, 1st series, vol. 4.djvu/154



It next became the object of the miner to discover the parts of the copper and tin veins, which had been severed and carried away by the flucan. This after much labour and expence was effected. On pursuing the downward direction of the flucan vein, after it had quitted the tin vein at B, it was found that the copper vein had been carried down about 18 fathoms from A to C, and the tin vein as much from B to D.

The working of the tin vein being the object of the miner, he found it proceeding in its underlie from D in the same direction as it had assumed between the surface and its place of intersection with the vein of flucan at B; but after sinking upon it about 9 fathoms, it was found (to use his phrase) cut out by the copper vein at E, whence a new and unlocked for delay and expense were incurred. It was at length discovered that the effect of this intersection was immediately opposed to that occasioned by the flucan vein, for the tin vein was as it were, heaved up by the copper vein 8 fathoms to F, whence it resumed its customary underlie and direction, and was followed for about 42 fathoms in depth to G, where it was intersected by the south slide d, by which it was heaved up about nine feet; it afterwards continued its course downwards as before, and was worked about 38 fathoms below to H. The south slide underlies towards the north about six feet in a fathom.

The accompanying longitudinal section of Huel Peever is along the run of the tin vein, and supposes its south side or wall taken away in order to exhibit the workings of the mine; and for the same reason also supposes a perfect continuation of the tin vein from the eastern side of the western cross vein z to the western side of the eastern cross vein x, although the fact was, as has been already noticed, that the tin vein was separated by the slide at 26 fathoms on its underlie from the surface, and carried