Page:Transactions of the Geological Society, 1st series, vol. 4.djvu/63

 and other springs in that neighbourhood, which was addressed in a letter to the Bishop of Carlisle, and inserted in the Philosophical Transactions. The spring continues to flow from the crevices of a basaltic vein for the space of 50 yards in length by 10 in breadth, and in summer, when the water is low, tinges the rocks red, and deposits a crust of salt upon them. The brine of this spring contains carbonate of iron, muriate of soda, and sulphate and carbonate of lime; but as it becomes mixed with the fresh water in issuing from the rock, the proportions of the mineral ingredients have not been well ascertained.

Within the distance of 200 yards from this spring two others of very different natures rise from bore-holes in the coal-measures. These are situated in a small dell, and according to Mr. Todd were discovered at the depth of 12$$\scriptstyle \frac 12$$ fathoms.

The spring furthest from the river is called the sweet well, and contains according to Dr. Clanny a small quantity of lime held in solution by carbonic acid. Half way between the sweet well and the Wear a sulphurous spring issues, and from the following analysis by Dr. Clanny, it will probably be found to possess valuable medicinal properties.