III. On the composition and origin of the waters of a salt spring in Huel Seton Mine, with a chemical and microscopical examination of certain rocks in its vicinity

Huel Seton Copper-Mine is situated about one mile north-east of the town of Camborne, Cornwall, and is distant from the sea, on the north coast, a little more than three miles. The workings of Huel Seton are entirely in “killas,” or clay-slate, and the saline waters issue at the rate of 50 gallons per minute, and at a temperature of 92° F., from the eastern fore breast of the 160-fathom level. This has intersected a fault, or cross course, which may be traced in a northerly direction to the sea.